A pressure-reducing valve includes a valve body that defines an inlet, an outlet, a chamber, and a flow path from the inlet to the outlet through the chamber. A poppet in the chamber is moveable over a stroke distance between open and closed positions with respect to a valve seat for flow through the flow path. The poppet is in the open position by default and has as head end, a shank end, and a gland disposed circumferentially near the shank end. A non-slip seal is disposed between the gland and the valve body in the chamber to the poppet against the valve body. The non-slip seal experiences elastic deformation upon movement of the poppet over the stroke distance. The elastic deformation provides elastic potential energy that acts to bias the poppet against the movement.
G05D 16/02 - Modifications du système pour réduire les effets d'instabilité, p.ex. dus aux vibrations, au frottement, à la température anormale, à la surcharge ou au déséquilibrage
G05D 16/10 - Commande de la pression d'un fluide sans source d'énergie auxiliaire l'élément sensible étant un piston ou un plongeur
F16J 15/32 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par joints élastiques, p.ex. joints toriques
A valve includes a valve body that has a flow path that connects the inlet and the outlet. A seal is disposed in the flow path. The seal has a closed state so as to block flow through the flow path and an open state so as to permit flow through the flow path. An armature is disposed in the valve body and is moveable with respect to the seal. An electromagnet is configured to selectively receive an electric current in a first current direction or a second, opposite current direction. When the electric current is in the first current direction the electromagnet actuates the armature to move the seal from closed to open and when the electric current is in the second current direction the electromagnet magnetically actuates the armature to move the seal from the open to closed.
A coupling includes first and second housings, a valve element, and a guide link. The first housing is rotatable relative to the second housing. The first housing has helical cam slots and the second housing has linear cam tracks. The guide link is in the first housing and is fixed with the valve element. The guide link carries cam rollers. The cam rollers ride in the helical slots and the linear cam tracks. Rotation of the first housing causes rotation of the helical slots. The rotation of the helical slots induces the cam rollers to travel along the helical slots and along the linear cam tracks such that the guide link translates linearly. The valve element moves with the guide link between open and closed positions.
F16L 37/244 - Accouplements du type à action rapide dans lesquels l'assemblage est réalisé par insertion selon l'axe d'un organe dans l'autre organe et en le faisant tourner d'une amplitude limitée, p.ex. comme dans un raccord à baïonnette dans lesquels l'accouplement et le tuyau sont coaxiaux
F16L 37/30 - Accouplements du type à action rapide avec moyens pour couper l'écoulement du fluide avec un obturateur dans chaque extrémité de tuyau
B64G 1/40 - Aménagements ou adaptations des systèmes de propulsion
B64G 5/00 - Equipement au sol pour les véhicules, p.ex. tours de lancement, installations de ravitaillement en combustible
F02K 9/00 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande
A shoot-through protection circuit including a first switch connected to a positive bus and connected to a first center node via a first electrical path, a second switch connected to a negative bus and connected to the first center node via a second electrical path, a circuitous third electrical path connecting the first center node to a first load output, a first magnetic core surrounding the first electrical path and the circuitous third electrical path, a second magnetic core surrounding the second electrical path and the circuitous third electrical path, and wherein a polarity of one of the first electrical path and the second electrical path is aligned with a polarity of the circuitous third electrical path within the corresponding one of the first magnetic core and the second magnetic core and a polarity of the other of the first electrical path and the second electrical path opposes the polarity of the circuitous third electrical path within the corresponding one of the first magnetic core and the second magnetic core.
H02M 1/38 - Moyens pour empêcher la conduction simultanée de commutateurs
H02M 1/00 - APPAREILS POUR LA TRANSFORMATION DE COURANT ALTERNATIF EN COURANT ALTERNATIF, DE COURANT ALTERNATIF EN COURANT CONTINU OU VICE VERSA OU DE COURANT CONTINU EN COURANT CONTINU ET EMPLOYÉS AVEC LES RÉSEAUX DE DISTRIBUTION D'ÉNERGIE OU DES SYSTÈMES D'ALI; TRANSFORMATION D'UNE PUISSANCE D'ENTRÉE EN COURANT CONTINU OU COURANT ALTERNATIF EN UNE PUISSANCE DE SORTIE DE CHOC; LEUR COMMANDE OU RÉGULATION - Détails d'appareils pour transformation
H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
A fuel-isolation system includes a valve body that defines a flow passage that extends from an inlet to an outlet, a rupture diaphragm in the flow passage and fluidly sealing the inlet from the outlet, and an actuator situated adjacent the rupture diaphragm. The ruprture diaphragm is integral with the valve body. The actuator includes a plunger that is configured to move and cause breach of the rupture diaphragm and thereby fluidly connect the inlet and the inlet.
F16K 17/16 - Soupapes ou clapets de sûreté; Soupapes ou clapets d'équilibrage fermant sur insuffisance de pression d'un côté avec élément de rupture l'élément étant un diaphragme de rupture
F16K 31/00 - Moyens de fonctionnement; Dispositifs de retour à la position de repos
A machine includes a stator and a rotor that is rotatable with respect to the stator. The rotor includes a shaft that has a paramagnetic shell. The shell defines a cavity therein, and there is a magnet disposed in the cavity. The magnet is of complementary shape to the cavity such that the magnet and paramagnetic shell are rotationally interlocked.
A spacecraft propulsion system including a first thruster system including a first power processing unit (30) connected to a first thruster string (20) via a crossover switching unit (40) and connected to a second thruster string (20) via the crossover switching unit (40). A second thruster system including a second power processing unit (30) connected to the second thruster string (20) via the crossover switching unit (40) and to the first thruster string (20) via the crossover switching unit (40). A controller (50) is connected to each of the first power processing unit, the second power processing unit, and the crossover switching unit.
A combustor includes a pressure-containing housing (22) and a one- piece body (24) disposed along an axis. The one-piece body has an exhaust manifold section (40) and a liner section (42). The exhaust manifold section defines a flow path and the liner section at least partially defines a combustion chamber (26) and extends axially from the exhaust manifold section into the pressure-containing housing. The exhaust manifold section is hermetically sealed to the housing. The liner section loosely abuts the pressure-containing housing at an end opposite the exhaust manifold section. The liner section and pressure-containing housing define an insulation cavity (58).
A valve device (20) includes male and female housings (22, 24) that together define a fluid through-passage (28). The male and female housings have, respectively, exterior and interior annular channels (22a, 24a). The male housing is receivable into the female housing such that the exterior and interior annular channels together define a toroidal tube. First and second valve elements (30, 32) are disposed, respectively, in the male and female housings. Ball locks (36) are receivable into the toroidal tube and axially lock the male and female housings together. A lock (40) engageable when the first and second valve elements are in functional alignment and which when engaged rotationally locks the male and female housings.
A shoot-through protection circuit includes a current sensor providing a sensor signal connected to a comparator (230) input via at least a burden resistor (120). A switch protection circuit (250) including a protection input connected to an output of the comparator and a plurality of outputs. Each of the outputs is connected to a corresponding switch (270) in a plurality of stacked switches. Wherein the switch protection circuit is configured to drive each switch of the plurality of stacked switches open in response to a positive output signal (240) from the comparator.
H02H 1/00 - CIRCUITS DE PROTECTION DE SÉCURITÉ - Détails de circuits de protection de sécurité
H02H 3/06 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec reconnexion automatique
H02H 3/08 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une surcharge
H02H 5/00 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions non électriques normales de travail avec ou sans reconnexion
H02H 7/122 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour redresseurs pour convertisseurs ou redresseurs statiques pour onduleurs, c. à d. convertisseurs de courant continu en courant alternatif
H02M 1/32 - Moyens pour protéger les convertisseurs autrement que par mise hors circuit automatique
H03K 17/08 - Modifications pour protéger le circuit de commutation contre la surintensité ou la surtension
An article includes a completed fabric structure that has multiple plies of fiber reinforced fabric. A first portion of the fabric structure has a three-directional fiber reinforced configuration and, exclusive of the first portion, a second portion of the fabric structure having a two-directional fiber reinforced configuration. In the three-directional fiber reinforced configuration there are multiple plies that are bound together via a matrix and a plurality of fibers normal through the multiple plies. In the two-directional fiber reinforced configuration the multiple plies are bound to one another via the matrix and not fibers normal through the multiple plies.
B32B 3/06 - Caractérisés par des caractéristiques de forme en des endroits déterminés, p.ex. au voisinage des bords pour attacher le produit à quelque chose d'autre p.ex. à un support
B32B 5/06 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par les caractéristiques de structure d'une couche comprenant des fibres ou des filaments caractérisés par une couche fibreuse imbriquée ou cousue avec une autre couche, p.ex. de fibres, de papier
B32B 5/26 - Produits stratifiés caractérisés par l'hétérogénéité ou la structure physique d'une des couches caractérisés par la présence de plusieurs couches qui comportent des fibres, filaments, grains ou poudre, ou qui sont sous forme de mousse ou essentiellement poreuses une des couches étant fibreuse ou filamenteuse un autre couche également étant fibreuse ou filamenteuse
B32B 7/09 - Liaison entre couches par des moyens mécaniques par couture, aiguilletage ou piqûre
B32B 19/02 - Produits stratifiés composés essentiellement de fibres ou particules minérales naturelles, p.ex. d'amiante, de mica collées avec ou enrobées dans une substance plastique
12.
THRUSTER NOZZLE ASSEMBLY WITH FLOW REGULATOR IN THROAT AREA AND ROTARY JOINT
A nozzle assembly according to an exemplary aspect of the present disclosure includes, among other things, a nozzle including a throat section. The nozzle further includes a ball portion of a ball and socket joint. The assembly further includes a vehicle including a socket portion of the ball and socket joint. The nozzle is mounted to the vehicle and the ball portion is received at least partially in the socket portion. A flow regulator is arranged adjacent the throat section and configured to regulate a flow of fluid through the throat section. The flow regulator is attached to the nozzle upstream of the throat section. An actuator is attached to the nozzle, and the actuator is configured to selectively rotate the nozzle via the ball and socket joint about a first axis normal to a longitudinal axis of the vehicle. A rocket and method are also disclosed.
F02K 9/84 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande caractérisés par la commande de la poussée ou du vecteur poussée utilisant des tuyères mobiles
F02K 1/08 - Variation de la section utile de la tubulure de jet ou de la tuyère par déplacement axial ou déformation transversale d'un organe interne, p.ex. du cône d'échappement
A liquid fuel rocket engine according to one example includes a combustor, a liquid fuel repository connected to the combustor via a fuel line and a first valve, an oxidizer repository connected to the combustor via an oxidizer line and a second valve, a valve controller configured to output a valve control current to the first valve, the valve controller storing instructions for determining at least one actual minimum impulse bit of a valve based on a current profile and a voltage profile of a single operation of the first valve, and to adjust valve controls to account for the at least one actual minimum impulse bit.
F02K 9/58 - Soupapes d'alimentation en combustible
F02K 9/80 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande caractérisés par la commande de la poussée ou du vecteur poussée
A catalyst-containing material includes a refractory matrix and particles of one or more catalytic metal elements or catalytic oxides. The particles are dispersed through, and embedded in, the refractory matrix.
F02C 3/14 - Ensembles fonctionnels de turbines à gaz caractérisés par l'utilisation de produits de combustion comme fluide de travail caractérisés par l'aménagement de la chambre de combustion dans l'ensemble
F02K 9/80 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande caractérisés par la commande de la poussée ou du vecteur poussée
A monopropellant thruster according to an exemplary aspect of the present disclosure includes, among other things, a first part having a catalyst bed, a thrust chamber, and a nozzle. The first part is integrally formed via a single additive manufacturing process. The thruster further includes a second part, which is a closeout. A method is also disclosed.
A reconfigurable power processing unit for a spacecraft including a plurality of power modules. Each of the power modules includes a first power source and a second power source. The first power source and the second power source are configured to be in series in a first state and in parallel in a second state. A plurality of contactors connect each power module to at least one of another power module in the plurality of power modules and a power processing output and are configured to control the state of the power modules.
A circuit for igniting and sustaining an electron discharge includes an ignitor circuit. The igniter circuit includes a high voltage transformer and a switch connected in series between a primary of the transformer and a DC source return. The switch is configured to receive a driving signal. A reset circuit is connected in parallel to the primary of the high voltage transformer. A first rectifier is connected in series between a secondary of the high voltage transformer and a keeper. A terminal of the secondary of transformer is connected to a cathode. The circuit for igniting and sustaining the electron discharge also includes a sustaining circuit having a current source with a return connected to a cathode and a second rectifier connected in series between the current source and the keeper.
H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
F03H 1/00 - Utilisation du plasma pour produire une poussée propulsive par réaction
B64G 1/22 - Parties de véhicules spatiaux ou équipements spécialement destinés à être fixés dans ou sur ces véhicules
H02M 1/40 - Moyens pour empêcher la saturation magnétique
H02M 3/28 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire
The hydrazine-containing composition is a liquid mixture that includes from 5 mol% to 95 mol% of unprotonated hydrazine selected from hydrazine, monomoethylhydrazine, dimethylhydrazine, ethylhydrazine, and combinations thereof, and from 5 mol% to 90 mol% of at least one oxygen-containing solute or solvent selected from acetals, acetyls, alcoxyamines having two or more carbon atoms, aldehydes, amides, amides and particularly carboxamides, aminoalcohols, carbazides, semicarbazides, carbon-containing nitrate salts comprising cations with logarithmic dissociation constants less than 9.2, hydroxyalkyl nitro compounds, hydroxyalkylhydrazines, carbonates, carboxylic acids and anhydrides of carboxylic acids, esters, ethers, ketals, ketones, mono- and poly-alcohols in 31% or greater mass fraction, nitrate esters, nitrosamines, sugars, and combinations thereof. The unprotonated hydrazine has a first vapor pressure and the oxygen-containing solvent has a second vapor pressure that is less than the first vapor pressure.
C06B 47/08 - Compositions dans lesquelles les composants sont conservés séparément jusqu'au moment de l'explosion ou de la combustion, p.ex. explosifs du type "Sprengel"; Suspensions d'un composant solide dans une phase liquide normalement non explosive, y compris une phase aqueuse épaissie les composants comportant un propergol binaire un composant contenant de l'hydrazine ou un dérivé d'hydrazine
The hydrazine-containing composition is a liquid mixture that includes from 5 mol% to 95 mol% of unprotonated hydrazine selected from hydrazine, monomoethylhydrazine, dimethylhydrazine, ethylhydrazine, and combinations thereof, and from 5 mol% to 90 mol% of at least one oxygen-containing solute or solvent selected from acetals, acetyls, alcoxyamines having two or more carbon atoms, aldehydes, amides, amides and particularly carboxamides, aminoalcohols, carbazides, semicarbazides, carbon-containing nitrate salts comprising cations with logarithmic dissociation constants less than 9.2, hydroxyalkyl nitro compounds, hydroxyalkylhydrazines, carbonates, carboxylic acids and anhydrides of carboxylic acids, esters, ethers, ketals, ketones, mono- and poly-alcohols in 31% or greater mass fraction, nitrate esters, nitrosamines, sugars, and combinations thereof. The unprotonated hydrazine has a first vapor pressure and the oxygen-containing solvent has a second vapor pressure that is less than the first vapor pressure.
C06B 47/08 - Compositions dans lesquelles les composants sont conservés séparément jusqu'au moment de l'explosion ou de la combustion, p.ex. explosifs du type "Sprengel"; Suspensions d'un composant solide dans une phase liquide normalement non explosive, y compris une phase aqueuse épaissie les composants comportant un propergol binaire un composant contenant de l'hydrazine ou un dérivé d'hydrazine
20.
INJECTOR WITH INJECTOR ELEMENTS IN CIRCUMFERENTIAL ROWS THAT ALTERNATE BETWEEN COUNTER-CLOCKWISE AND CLOCKWISE SWIRL
An injector for a liquid rocket engine includes an array of injector elements. Each injector element includes a central passage and a plurality of peripheral transverse passages. The central passages are configured to provide axial injection flow and the peripheral transverse passages are configured to provide swirl injection flow about the axial injection flow. A portion of the injector elements are configured to provide the swirl injection flow in a clockwise direction and another portion of the injector elements are configured to provide the swirl injection flow in a counter-clockwise direction. The injector elements are arranged to form a plurality of circumferential rows. The injector elements of each individual circumferential row are either all of the clockwise direction or all of the counter-clockwise direction. At least one of the circumferential rows is of the clockwise direction and at least one of the circumferential rows is of the counter-clockwise direction.
A pump includes a shaft that is rotatable about a central axis. An inducer is mounted on the shaft and has an inducer blade and inducer shroud attached at an outer end of the inducer blade. An impeller is mounted on the shaft downstream of the inducer and has an impeller blade and an impeller shroud attached at an outer end of the impeller blade. There is an axially-elongated annular seal element disposed at an axial end of the inducer shroud that provides sealing between the inducer shroud and the impeller shroud.
A power converter includes a first rectifier circuit having a pair of first rectifier circuit output terminals and a second rectifier circuit having a pair of second rectifier circuit output terminals, a snubber circuit comprising a first diode and a first capacitor connected to each other at a first node and connecting the pair of first rectifier circuit output terminals, a second diode and a second capacitor connected to each other at a second node and connecting the pair of second rectifier circuit output terminals, a third diode connecting the first node to one of the pair of second rectifier output terminals, and a fourth diode connecting the second node to one of the pair of first rectifier output terminals.
H02M 1/00 - APPAREILS POUR LA TRANSFORMATION DE COURANT ALTERNATIF EN COURANT ALTERNATIF, DE COURANT ALTERNATIF EN COURANT CONTINU OU VICE VERSA OU DE COURANT CONTINU EN COURANT CONTINU ET EMPLOYÉS AVEC LES RÉSEAUX DE DISTRIBUTION D'ÉNERGIE OU DES SYSTÈMES D'ALI; TRANSFORMATION D'UNE PUISSANCE D'ENTRÉE EN COURANT CONTINU OU COURANT ALTERNATIF EN UNE PUISSANCE DE SORTIE DE CHOC; LEUR COMMANDE OU RÉGULATION - Détails d'appareils pour transformation
H02M 7/06 - Transformation d'une puissance d'entrée en courant alternatif en une puissance de sortie en courant continu sans possibilité de réversibilité par convertisseurs statiques utilisant des tubes à décharge sans électrode de commande ou des dispositifs à semi-conducteurs sans éléctrode de commande
An impedance measurement circuit includes a signal injector having a voltage input and a voltage output, a controllable switch, and a voltage drop device connected in parallel with the controllable switch between the voltage input and the voltage output. The voltage output is connected to a load. A voltage sensor is configured to measure a voltage across the load. A current sensor is configured to measure a current draw of the load. A computing device is configured to determine an impedance of the load at a frequency based on the measured voltage and the measured current. The computing device controls the switch based on the frequency.
G01R 27/02 - Mesure de résistances, de réactances, d'impédances réelles ou complexes, ou autres caractéristiques bipolaires qui en dérivent, p.ex. constante de temps
25.
COPPER COMBUSTION CHAMBER ATTACHED TO INJECTOR BY NON-COPPER WELD TRANSITION RING
A rocket engine includes a copper alloy combustion chamber, a non-copper weld transition ring welded to the copper alloy combustion chamber, and an injector assembly welded to the non-copper weld transition ring. The engine can be manufactured by forming the copper alloy combustion chamber using additive manufacturing, welding the non-copper weld transition ring to the copper alloy combustion chamber, and welding the injector assembly to the non-copper weld transition ring.
A pump includes an axial inducer. The axial inducer includes a housing that has an internal surface that defines an axial fluid passage. A rotor is disposed about a central axis in the fluid passage. The rotor includes at least one blade that defines at least one blade tip. The internal surface of the housing defines a plurality of grooves adjacent the at least one blade tip. The grooves are elongated in a circumferential direction.
F04D 29/42 - Carters d'enveloppe; Tubulures pour le fluide énergétique pour pompes radiales ou hélicocentrifuges
F04D 29/16 - Joints d'étanchéité entre le côté du refoulement et celui de l'aspiration
F04D 29/22 - Rotors spécialement pour les pompes centrifuges
F04D 29/68 - Lutte contre la cavitation, les tourbillons, le bruit, les vibrations ou phénomènes analogues; Equilibrage en agissant sur les couches limites
An injector element for a liquid propellant rocket engine includes an oxidizer conduit, a central cavity that is fluidly coupled with the oxidizer conduit downstream of the oxidizer conduit, a first annulus that at least partially surrounds the oxidizer conduit and is fluidly coupled with an ignition fluid supply downstream of the ignition fluid supply, and a second annulus that at least partially surrounds the oxidizer conduit and is fluidly coupled with a fuel supply downstream of the fuel supply. The second annulus is fluidly coupled between the first annulus and the central cavity
A modified projectile includes a projectile, a container, and a liquid propellant in the container. The container is detachably attached to the projectile
F41A 1/04 - Propulsion de projectiles utilisant la combustion d'une charge propulsive liquide ou gazeuse, p.ex. d'un hypergol
F42B 14/08 - Sabots contenant une charge propulsive; Enlèvement de sabots par la combustion des éléments pyrotechniques ou par la pression des gaz propulsifs
F42B 5/10 - Cartouches, c. à d. projectile et douille avec charge propulsive formant un tout avec balle autopropulsée
A turbopump includes a slinger that has a first section and a second section. The first and second sections are disposed substantially radially in a fluid circuit. The second section is downstream of, and radially inward of, the first section. A housing is located downstream and adjacent to the first section of the slinger and radially outward of the second section of the slinger.
A liquid propellant rocket engine includes a pump that is disposed along a central axis. The pump includes a purge system, a collection annulus in fluid communication with the purge system, and a drain. The collection annulus has an outer diameter wall, an inner diameter wall, and an end wall. The end wall defines an annular channel that has a channel depth that varies circumferentially. The drain opens to the collection annulus. At the drain, the annular channel has a lowest point at which the channel depth is maximum depth.
F02K 9/48 - Alimentation en propergols utilisant des pompes entraînées par une turbine à gaz, elle-même entraînée par les gaz de combustion des propergols
F02K 9/54 - Détecteurs de fuite; Systèmes de purge; Systèmes de filtration
A liquid propellant rocket engine includes a main turbo-pump and a boost turbo-pump. The main turbo-pump has a main pump with an outlet that is fluidly coupled with a supply line. The boost turbo-pump includes a housing, a rotor, a boost pump, and a turbine. The boost pump includes a first portion of the housing and a first portion the rotor. The turbine includes a second portion of the housing and a second portion of the rotor. The turbine has turbine blades attached to the second portion of the rotor and an inlet fluidly coupled with the supply line. The turbine has a plurality of circumferentially disposed feed lines defined by the second portion of the housing and not the first portion of the housing. The feed lines are fluidly coupled between the inlet and the turbine blades. The feed lines have an acute angle turn.
F04D 13/04 - Ensembles comprenant les pompes et leurs moyens d'entraînement la pompe étant entraînée par un fluide
B64G 1/40 - Aménagements ou adaptations des systèmes de propulsion
F02K 9/48 - Alimentation en propergols utilisant des pompes entraînées par une turbine à gaz, elle-même entraînée par les gaz de combustion des propergols
F04D 29/52 - Carters d'enveloppe; Tubulures pour le fluide énergétique pour pompes axiales
An engine start system includes a facility that has a ground based hydraulic pressurization system and a combustor of a liquid propellant rocket engine. The engine is fluidly coupled to the ground based hydraulic pressurization system. The liquid propellant rocket engine is operably detachable from the ground based hydraulic pressurization system.
F02K 9/95 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande caractérisés par des moyens ou des aménagements de démarrage ou d'allumage
A solid rocket motor (20) includes a case (32), a throat (24a), a nozzle (22), a nitinol ring (138a) at least partially surrounding the throat, and a spring-loaded pin (36) to which the ring is attached. The spring-loaded pin abuts the throat.
F02K 9/86 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande caractérisés par la commande de la poussée ou du vecteur poussée utilisant des tuyères à section réglable
A duct includes first and second bellows sections. First and second torsional rings are attached to, respectively, the first and second bellows sections. First and second dynamic seals are sandwiched between the first and second torsional rings.
F02K 9/80 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande caractérisés par la commande de la poussée ou du vecteur poussée
F16J 15/16 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre
35.
LIQUID PROPELLANT ROCKET ENGINE WITH PASSIVE CONDENSATE COOLING
A liquid propellant rocket engine includes a combustion chamber that has a throat and a nozzle aft of the throat. The nozzle has a first nozzle section adjacent the throat and a second nozzle section aft of the first nozzle section. The first nozzle section includes active cooling features and the second nozzle section excludes any active cooling features. The first nozzle section is operative via at least the active cooling features to form a condensate that passively cools the second nozzle section.
A solid rocket motor includes a fuel, a binder, a perchlorate oxidizer that is thermally decomposable to perchlorate decomposition products, and a salt compound that is reactive with one or more of the perchlorate decomposition products.
A solid rocket propellant includes a hydroxyl-terminated polybudadiene (HTPB) binder system having a high molecular weight diol that is greater than thirty carbon atoms (> C30) and less than fifty carbon atoms (< C50) and excluding dimeryl diisocyanate (DDI).
C06B 45/10 - Compositions ou produits définis par une structure ou des dispositions particulières des composants ou du produit comportant des particules solides dispersées dans une solution solide ou une matrice le composé étant une solution solide ou matrice contenant un composant organique le composant organique contenant une résine
A rocket motor includes a case and first and second nozzles in the case. The first nozzle is disposed in the second nozzle. The first nozzle includes a forward leg, a rear leg, and an intermediate leg. The intermediate leg has a convex conical geometry, and the forward leg has a forward lip that is spaced from the case. The rear leg has a rear lip that is spaced from the case. The forward leg and the rear leg at least partially define a flow passage through the first nozzle. The first nozzle is exclusively secured by the intermediate leg to at least one of the case or the second nozzle. At least a portion of a fragmentation system is disposed between the first and second nozzles.
F02K 7/10 - Ensembles fonctionnels dans lesquels le fluide de travail est utilisé uniquement sous forme de jet, c. à d. ensembles ne comportant ni turbine ni autre moteur entraînant un compresseur ou une soufflante carénée; Leur commande caractérisés par une compression dans un diffuseur, c. à d. tubulures aéro-thermodynamiques ou statoréacteurs
F02K 9/32 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande utilisant des propergols solides - Détails non prévus ailleurs
39.
PROPULSION SYSTEM WITH DIFFERENTIAL THROTTLING OF ELECTRIC THRUSTERS
A propulsion system includes at least one group of electric thrusters that are spatially distributed in a multi-axis system. A controller is in communication with each of the electric thrusters. The controller is configured to differentially throttle the thrusts of the electric thrusters with respect to propulsion force about two axes of the multi-axis system.
A solid rocket propellant includes a binder that has hydroxyl-terminated polybudadiene (HTPB) with a curative that is selected from isocyanate-terminated polyether, isocyanate-terminated polysiloxane, or combinations thereof.
C06B 45/10 - Compositions ou produits définis par une structure ou des dispositions particulières des composants ou du produit comportant des particules solides dispersées dans une solution solide ou une matrice le composé étant une solution solide ou matrice contenant un composant organique le composant organique contenant une résine
C08G 18/10 - Procédés mettant en œuvre un prépolymère impliquant la réaction d'isocyanates ou d'isothiocyanates avec des composés contenant des hydrogènes actifs, dans une première étape réactionnelle
C08L 83/08 - Polysiloxanes contenant du silicium lié à des groupes organiques contenant des atomes, autres que le carbone, l'hydrogène et l'oxygène
A method for solar array (28a, 28b) deployment includes deploying a first portion of solar cells of a solar array responsive to a first drag condition, charging a battery (26) with the first portion of solar cells, activating an electric thruster (24) at a first power level using the first portion of solar cells, deploying a second portion of solar cells of the solar array responsive to a second drag condition that is lower than the first drag condition, and activating the electric thruster at a second power level that is higher than the first power level using the first portion of solar cells and the second portion of solar cells.
C06B 45/10 - Compositions ou produits définis par une structure ou des dispositions particulières des composants ou du produit comportant des particules solides dispersées dans une solution solide ou une matrice le composé étant une solution solide ou matrice contenant un composant organique le composant organique contenant une résine
A flex joint (22) includes a bellows (33) and a liner system (46) disposed in the bellows. The liner system includes two generally cylindrical liner pieces (50,52) that are connected to each other in an articulated joint (54). One of the two generally cylindrical liner pieces defines a ball joint end (56) and the other of the two generally cylindrical liner pieces defines a socket joint end (58). The ball joint end is engaged with the socket joint end to form a ball and socket joint as the articulated joint.
F02K 9/60 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande utilisant des propergols liquides ou gazeux - Détails non prévus ailleurs
F02K 9/84 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande caractérisés par la commande de la poussée ou du vecteur poussée utilisant des tuyères mobiles
A method for fabricating a solid rocket motor case (26) includes applying an insulator material (34) around a mandrel, embedding at least two rigid support pieces (36) in the insulator material (34), wherein the at least two rigid support pieces (36) are axially symmetric about the insulator material (34), filament winding a case around the insulator (34), machining access holes (38) through the case (32) to, respectively, each of the at least two rigid support pieces (36), affixing pivoting hardware (24) to each of the at least two rigid support pieces (36) through the access holes (38), and uprighting the case (26) via the pivoting hardware (24).
B29C 70/32 - Façonnage par empilage, c.à d. application de fibres, de bandes ou de feuilles larges sur un moule, un gabarit ou un noyau; Façonnage par pistolage, c.à d. pulvérisation de fibres sur un moule, un gabarit ou un noyau sur un moule, un gabarit ou un noyau rotatifs
B29C 70/54 - Façonnage de matières composites, c. à d. de matières plastiques comprenant des renforcements, des matières de remplissage ou des parties préformées, p.ex. des inserts comprenant uniquement des renforcements, p.ex. matières plastiques auto-renforçantes opération de façonnage des matières composites comprenant uniquement des renforcements - Parties constitutives, détails ou accessoires; Opérations auxiliaires
B29C 70/86 - Incorporation dans des couches de renforcement imprégnées cohérentes
F02K 9/34 - Carters; Chambres de combustion; Leurs chemises
B64G 1/64 - Systèmes pour réunir ou séparer des véhicules spatiaux ou des parties de ceux-ci, p.ex. aménagement pour l'accostage ou l'amarrage
B29C 69/00 - Combinaisons de techniques de façonnage non prévues dans un seul des groupes principaux , p.ex. associations de techniques de moulage et d'assemblage; Appareils à cet effet
B29C 53/56 - Enroulement et assemblage, p.ex. enroulement en spirale
45.
SHORT CIRCUIT PROTECTION FOR SWITCHING POWER CONVERTERS
A circuit (100) for protecting a Switching Power Converter ("SPC") when a short-circuit load condition occurs. The SPC has an output current sensor utilizing at least one current transformer that has a primary winding connected in series with a rectifier and has a magnetic core that should avoid saturation. A pulse-width modulator includes a skip controller providing a series of control pulses to at least one switch. A control pulse is skipped when an abnormally low load resistance causes an input current ramp signal to exceed an input current setpoint signal proximate a start time of a next control pulse of the series and the output current is greater than a predetermined threshold. Operation of the SPC is stopped if more than a predetermined number of consecutive switching cycles are skipped to prevent operation of the SPC while the core of an output current transformer is saturated.
H02M 3/335 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrodes de commande pour produire le courant alternatif intermédiaire utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs
H02M 3/00 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu
H02M 3/137 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type thyratron ou thyristor exigeant des moyens d'extinction utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p.ex. régulateurs à commutation
H02M 3/156 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p.ex. régulateurs à commutation
H02M 3/157 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p.ex. régulateurs à commutation avec commande numérique
H02M 3/158 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs statiques utilisant des tubes à décharge avec électrode de commande ou des dispositifs à semi-conducteurs avec électrode de commande utilisant des dispositifs du type triode ou transistor exigeant l'application continue d'un signal de commande utilisant uniquement des dispositifs à semi-conducteurs avec commande automatique de la tension ou du courant de sortie, p.ex. régulateurs à commutation comprenant plusieurs dispositifs à semi-conducteurs comme dispositifs de commande finale pour une charge unique
H02M 3/16 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu sans transformation intermédiaire en courant alternatif par convertisseurs dynamiques
A solid rocket motor includes a case, a solid propellant, and a seal attached to the motor. The seal isolates the solid propellant from a fluid external of the case, and the seal is at least partially transparent.
F02K 9/96 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande caractérisés par des aménagements spécialement conçus pour des tests ou des mesures
A rocket motor (20) includes a nozzle (22) and a solid propellant section (24) in communication with the nozzle. The solid propellant section includes a first energetic grain layer (38, 32) that has a top surface and a bottom surface, and a second energetic grain layer (40, 44) that has a top surface and a bottom surface. The second layer is located on top of the first layer. The bottom surface of the second energetic grain layer partially abuts the top surface of the first energetic grain layer, and the bottom surface of the second energetic grain layer and the top surface of the first energetic grain layer define a region (46, 48) therebetween. A powder energetic (49) is disposed in the region.
F02K 9/12 - Forme ou structure des charges de propergols solides composées d'au moins deux parties brûlant à des vitesses différentes
F02K 9/18 - Forme ou structure des charges de propergols solides du type à combustion sur leur surface interne comportant une cavité interne en forme d'étoile ou en forme analogue
F02K 9/24 - Chargement des moteurs-fusées en propergols solides; Procédés ou appareils spécialement adaptés pour façonner les charges de propergols solides
B29C 67/00 - Techniques de façonnage non couvertes par les groupes , ou
48.
PROCESS FOR NON-DESTRUCTIVE TESTING USING DIRECT STRAIN IMAGING
A process for non-destructive testing includes applying a photo-curable dye to a surface of an article, selectively curing an array of dots of the photo-curable dye on the surface, removing the photo-curable dye that has not been selectively cured, mechanically testing the article, and direct strain imaging the article during the mechanical testing based on the array of dots.
G01N 3/08 - Recherche des propriétés mécaniques des matériaux solides par application d'une contrainte mécanique par application d'efforts permanents de traction ou de compression
G01B 11/16 - Dispositions pour la mesure caractérisées par l'utilisation de techniques optiques pour mesurer la déformation dans un solide, p.ex. indicateur optique de déformation
G01N 33/00 - Recherche ou analyse des matériaux par des méthodes spécifiques non couvertes par les groupes
A polar boss includes an annular body that has an inner diameter region with a plurality of fastener openings circumferentially spaced around the inner diameter region that extend into the annular body. The inner diameter region defines a central opening through the annular body. The annular body includes a core and a shell that at least partially encapsulates the core. The core is formed of a first composite material and the shell is formed of a second, different composite material.
F02K 9/18 - Forme ou structure des charges de propergols solides du type à combustion sur leur surface interne comportant une cavité interne en forme d'étoile ou en forme analogue
A solid rocket motor includes a propellant grain and a barrier shielding at least a portion of the grain. The barrier is impermeable to water, oxygen, nitrogen, and volatile solid propellant species.
F02K 9/18 - Forme ou structure des charges de propergols solides du type à combustion sur leur surface interne comportant une cavité interne en forme d'étoile ou en forme analogue
F02K 9/34 - Carters; Chambres de combustion; Leurs chemises
F02K 9/95 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande caractérisés par des moyens ou des aménagements de démarrage ou d'allumage
52.
FLOW CONTROL SYSTEM WITH PARALLEL FUEL PASSAGE NETWORK
A flow control system (22) includes a fuel passage network (34) that has first (36) and second (38) network portions that are in a parallel flow arrangement with each other. A fueldraulic device (40) is located in the first network portion. Operation of the fueldraulic device varies flow through the first network portion. A flow restriction orifice (42) is located in the fuel passage network and is arranged in series with, and upstream of, the fueldraulic device. The flow restriction orifice is operable to generate a pressure differential that varies responsive to the flow through the first network portion. A flow control valve (44) is located in the second network portion. The flow control valve is operable responsive to the pressure differential across the flow restriction orifice to control flow through the second network portion.
F02K 9/80 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande caractérisés par la commande de la poussée ou du vecteur poussée
F02K 9/46 - Alimentation en propergols utilisant des pompes
F02K 9/84 - Moteurs-fusées, c. à d. ensembles fonctionnels portant à la fois le combustible et son oxydant; Leur commande caractérisés par la commande de la poussée ou du vecteur poussée utilisant des tuyères mobiles
A catalytic thruster includes a reaction chamber that extends between first and second opposed chamber ends. The first chamber end includes a thermal standoff cup. There is a catalyst bed in the reaction chamber, and a feed tube extends into the reaction chamber through the thermal standoff cup.
An ignition system includes a multi-metallic ignition body that has at least two metallic elements in contact with each other. The metallic elements define an ignition initiation temperature above which there is a self-sustaining alloying reaction. A fluorine-containing body is in contact with the multi-metallic ignition body. The metallic elements may include palladium or palladium-ruthenium and aluminum.
A latch valve includes a ferromagnetic shell, a ferromagnetic pole, a permanent magnet, an electromagnet, and a ferromagnetic plunger that is disposed within the ferromagnetic shell.
A latch valve includes a ferromagnetic shell, a ferromagnetic pole, a permanent magnet disposed within the ferromagnetic shell, an electromagnet disposed within the ferromagnetic shell, a seal, and a magnetic plunger disposed within the ferromagnetic shell. The ferromagnetic shell, the permanent magnet, the electromagnet and the magnetic plunger are configured in a magnetic circuit, and the magnetic plunger is configured to selectively compresses the seal based on a force produced by the magnetic circuit.
A thruster nozzle (24) includes a throat (28) and a nozzle end portion (30) that is integral with the throat. The nozzle end portion includes an outer wall (32) that has a plurality of circumferentially-disposed nozzle features or connectors (34). A brace (26) may be disposed at least partially around the thruster nozzle and mated with the nozzle features to restrict relative movement between the thruster nozzle and the brace. The brace may be attached with a vehicle body (22) of a vehicle.
A Hall thruster includes an annular discharge channel, a cathode, an exclusive outer magnetic core disposed asymmetric to the annular discharge channel, and an outer magnetic pole between the cathode and the annular discharge channel. The outer magnetic core circumscribes at least a portion of the cathode.
A valve assembly includes a valve body, a first spring seat disposed within the valve body, a preload spring disposed within the valve body and mated with the first spring seat, and a second spring seat disposed within the valve body and mated with the preload spring. The second spring seat is adjustably mated to the valve body.
A turbopump machine includes a housing, a shaft rotatably supported in the housing on a set of bearings, an axial pump coupled with the shaft, a circumferential discharge volute fluidly coupled with the axial pump, and a turbine coupled with the shaft. The turbine includes a blade row disposed in an axial turbine flowpath that has an axial turbine flowpath discharge that is fluidly coupled with the circumferential discharge volute. A cooling passage is disposed between the housing and the shaft about the set of bearings. The cooling passage has a cooling passage discharge that is fluidly coupled with the circumferential discharge volute. The cooling passage discharge is adjacent the axial turbine flowpath discharge. A seal isolates the cooling passage discharge from the axial turbine flowpath discharge.
F02K 9/48 - Alimentation en propergols utilisant des pompes entraînées par une turbine à gaz, elle-même entraînée par les gaz de combustion des propergols
61.
ROCKET MOTOR WITH ENERGETIC GRAIN HAVING MICRO-VOIDS, SOLID PROPELLANT AND PROCESS OF ADDITIVE MANUFACTURING FOR FABRICATING SAID PROPELLANT
A rocket motor (20) includes a nozzle (22) and a solid propellant (24) section in communication with the nozzle. The solid propellant section includes a first energetic grain layer (34) that has a top surface and a bottom surface, and a second energetic grain layer (32) that has a top surface and a bottom surface. The second layer is located on top of the first layer. The bottom surface of the second energetic grain layer partially abuts the top surface of the first energetic grain layer, and the bottom surface of the second energetic grain layer and the top surface of the first energetic grain layer define a micro-void therebetween.
A valve assembly includes a housing (22) that has a fluid input (24) and a fluid output (26). A pintle (30) is disposed in the housing, and an actuator (36) is operatively coupled to move the pintle. The pintle includes a passage (32) that fluidly couples the fluid output with a pressure balance volume (34) located between the pintle and the housing adjacent the linear actuator. A controller (38) is electrically connected with the actuator, and there is a variable flow area (40) from the fluid input to the fluid output that is defined between the pintle and the housing.
F16K 37/00 - Moyens particuliers portés par ou sur les soupapes ou autres dispositifs d'obturation pour repérer ou enregistrer leur fonctionnement ou pour permettre de donner l'alarme
F16K 39/02 - Dispositifs pour relâcher la pression sur les faces d'un joint d'étanchéité dans le cas de soupapes de levage
Systems (100) and methods (300, 500) for controlling an electromechanical valve element (116). The methods involve: building up a magnetic flux through a valve (206) of the electromechanical valve element by supplying a PWM signal to an electromechanically inductive coil (202) of the electromechanical valve element at a power level lower than a power level needed to actuate the valve. When the valve needs to be opened, an amplitude of the PWM signal is increased such that the power provided to the electromechanically inductive coil rises to a power level sufficient to actuate the valve. Notably, the valve opens when a power cycling time of the PWM signal increases beyond a minimum power required to open the valve.
Systems and methods for powering an electrical thruster (112) of a vehicle (100). The methods comprise providing an unregulated high voltage output current of a high voltage solar array (122) directly to an electric propulsion system (104) of the vehicle. The electric propulsion system generates a converted high voltage current by converting a voltage level of the unregulated high voltage output current. The converted high voltage current is supplied directly to an anode of the electrical thruster. A regulated low voltage current is also generated by regulating a low voltage output of a low voltage solar array (124). The regulated low voltage current is used to supply power to at least one electronic component of the electrical thruster.
An additive manufacturing process includes pressurizing and heating a slurry, flowing the pressurized heated slurry through a nozzle, and depositing the slurry in a predetermined pattern.
A liquid propellant rocket engine includes a combustion chamber that has a throat. A nozzle diverges from the throat. The nozzle includes an afterburner combustor section that has a fuel injector orifice. A gas generator includes an exhaust duct and there is at least one turbine that has a turbine inlet and a turbine outlet. The turbine inlet is fluidly coupled with the exhaust duct, and a turbine outlet is fluidly coupled with the fuel injector orifice.
F02K 9/48 - Alimentation en propergols utilisant des pompes entraînées par une turbine à gaz, elle-même entraînée par les gaz de combustion des propergols
A turbopump includes an impeller (22) that is rotatable about an axis (A). A discharge collector (28) is located radially outward of the impeller. A passage (30) fluidly connects the impeller to the discharge collector. The passage is curved.
A circuit (400, 700, 800) comprising: a first power source (402) supplying first current to a load (470) during a first Period of Time ("PoT"); a second power source (416) supplying a second current to the load during a second POT; a Unidirectional Current Valve ("UCV") in series with the first power source; a current detector (420, 702, 802) in series with the UCV (422); and a switch (424) in parallel with a series combination of the current detector and UCV to bypass the UCV during the second PoT. The current detector determines whether the second period of time has commenced and whether the switch has closed.
H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p.ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
A munition includes a composite case, a blast cone housed by the composite case, a grenade aft of the blast cone and housed by the composite case, a first attenuator forward of the blast cone, and a second attenuator aft of the blast cone and forward of the grenade.
F42B 12/16 - Projectiles ou mines caractérisés par la charge militaire, l'effet recherché ou le matériau caractérisés par la nature de la charge militaire ou par l'effet recherché du type perforant à charge creuse ou profilée comportant un projectile ou une charge additionnels, agissant en succession sur la cible
F42B 12/20 - Projectiles ou mines caractérisés par la charge militaire, l'effet recherché ou le matériau caractérisés par la nature de la charge militaire ou par l'effet recherché du type à explosif brisant
A fragmenting nozzle system includes a first nozzle at least partially disposed within a second nozzle. The first nozzle includes an ablative shell, a syntactic foam support disposed between the ablative shell and the second nozzle, and an ignition system disposed at least partially within the syntactic foam support. For example, the ignition system is operable to generate a controlled-energy deflagration pressure wave that fragments the first nozzle but not the second nozzle.
A monopropellant includes 30-70% by weight of an oxidizer including hydroxylammonium nitrate, 5-50% by weight of a fuel, and a burn rate modifier in a non-zero amount of up to 3% by weight. The burn rate modifier can be selected from vanadium salts, iron salts, and combinations thereof. The monopropellant is a stable liquid between -20C and 100C at ambient pressure.
C06B 23/00 - Compositions caractérisées par des constituants non explosifs ou non thermiques
C06B 31/00 - Compositions contenant un sel inorganique d'un composé d'azote et d'oxygène
C06B 47/00 - Compositions dans lesquelles les composants sont conservés séparément jusqu'au moment de l'explosion ou de la combustion, p.ex. explosifs du type "Sprengel"; Suspensions d'un composant solide dans une phase liquide normalement non explosive, y compris une phase aqueuse épaissie
System (300, 400) and methods (500) for testing a reaction thruster (100) in a vacuum environment. The methods comprise: disposing the reaction thruster in a vacuum chamber which is at least partially connected to earth ground; removing at least one gas from the vacuum chamber to provide the vacuum environment; operating the reaction thruster so as to create a beam of electrons; and/or electrically isolating the electrons of the beam from at least one electrically conductive surface of the vacuum chamber. The electrical isolation can be achieved by applying an electrical bias voltage to the beam via an electrode. The electrode may comprise a conductive object disposed in the vacuum chamber and/or at least a portion of a vacuum chamber wall. In all cases, the electrode is electrically isolated from a portion of the vacuum chamber that is connected to ground.
A propulsion system according to an exemplary aspect of the present disclosure includes, among other things, a pressurant selectively released from a pressure tank to drive a pump to sustain propellant flow for main combustion.
F02K 9/48 - Alimentation en propergols utilisant des pompes entraînées par une turbine à gaz, elle-même entraînée par les gaz de combustion des propergols
F02K 9/50 - Alimentation en propergols utilisant du fluide pressurisé pour mettre les propergols sous pression
74.
GAS GENERATOR AND REACTANT THAT INCLUDE NITROALCOHOL
A gas generator includes a reactor and a reactant. The reactant includes nitroalcohol, and the reactor is operable to decompose the reactant to generate a gaseous product. Also disclosed is a reactant system for generating a gaseous product. The reactant system includes at least first and second reactants, one of which includes nitroalcohol. The first and second reactants are cooperatively thermally decomposable to generate the gaseous product. A method of providing a reactant system for generating a gaseous product includes contacting a first reactant with a second reactant, and the first reactant includes nitroalcohol.
C06B 25/00 - Compositions contenant un composé organique nitré
C06B 47/00 - Compositions dans lesquelles les composants sont conservés séparément jusqu'au moment de l'explosion ou de la combustion, p.ex. explosifs du type "Sprengel"; Suspensions d'un composant solide dans une phase liquide normalement non explosive, y compris une phase aqueuse épaissie
C06B 47/02 - Compositions dans lesquelles les composants sont conservés séparément jusqu'au moment de l'explosion ou de la combustion, p.ex. explosifs du type "Sprengel"; Suspensions d'un composant solide dans une phase liquide normalement non explosive, y compris une phase aqueuse épaissie les composants comportant un propergol binaire
C06B 29/00 - Compositions contenant un sel inorganique d'un composé d'halogène et d'oxygène, p.ex. chlorate, perchlorate
A method for the manufacture of a composite fragmenting material having exothermic properties includes the steps of packing a mold with preformed metal fragments; filling interstitial spaces surrounding the metal fragments with a reactive metal powder to form a mixture; and then sintering the mixture at a temperature effective to both coat the metal fragments with the reactive metal powder and to bond the metal fragments together. In one embodiment the composite fragmenting material is formed into a nosecone for a warhead.
F42B 12/22 - Projectiles ou mines caractérisés par la charge militaire, l'effet recherché ou le matériau caractérisés par la nature de la charge militaire ou par l'effet recherché du type à explosif brisant à structure de corps de fragmentation
F42B 12/32 - Projectiles ou mines caractérisés par la charge militaire, l'effet recherché ou le matériau caractérisés par la nature de la charge militaire ou par l'effet recherché du type à explosif brisant à structure de corps de fragmentation l'enveloppe ou la paroi du projectile contenant un ensemble de corps individuels encastrés, p.ex. de sphères en acier
C06D 5/06 - Production de gaz sous pression, p.ex. pour cartouches de mine, cartouches de mise à feu, fusées par réaction de plusieurs solides
76.
ENHANCED RADIATIVE TRANSFER AND HEAT RECOVERY FOR COMBUSTION DEVICE
A stove (100) includes a combustion chamber (126) for producing heat, a thermoelectric device (122) thermally coupled to a hot source (114) and a cold source (116), a battery, a fan (118) electrically connected to the thermoelectric device (122) and the battery, and a controller configured to monitor the battery and thermoelectric device (122) and configured to direct the fan (118) be operated from power provided from the battery when power produced from the thermoelectric device (122) is insufficient to power the fan (118). The stove (100) can have an associated heating plate (106), and the walls of the combustion chamber (126) can be configured to reflect heat onto the heating plate (106).
F24B 13/00 - POÊLES OU FOURNEAUX À USAGE DOMESTIQUE, POUR COMBUSTIBLES SOLIDES ; INSTRUMENTS ACCESSOIRES POUR L'UTILISATION DES POÊLES OU DES FOURNEAUX - Parties constitutives propres uniquement aux poêles ou fourneaux brûlant des combustibles solides
H02N 3/00 - Générateurs dans lesquels l'énergie thermique ou cinétique est convertie en énergie électrique par ionisation d'un fluide et enlèvement de sa charge
F02G 5/00 - Utilisation non prévue ailleurs de la chaleur perdue par les moteurs à combustion
A stove (100) includes a combustion chamber (126) for producing heat, a thermoelectric device (120) thermally coupled to a hot source (114) and a cold source (116), a battery, a fan (118) electrically connected to the thermoelectric device (120) and the battery, and a controller configured to monitor the battery and thermoelectric device (120) and configured to direct the fan (118) be operated from power provided from the battery when power produced from the thermoelectric device (120) is insufficient to power the fan (118).
H02N 3/00 - Générateurs dans lesquels l'énergie thermique ou cinétique est convertie en énergie électrique par ionisation d'un fluide et enlèvement de sa charge
F24B 13/00 - POÊLES OU FOURNEAUX À USAGE DOMESTIQUE, POUR COMBUSTIBLES SOLIDES ; INSTRUMENTS ACCESSOIRES POUR L'UTILISATION DES POÊLES OU DES FOURNEAUX - Parties constitutives propres uniquement aux poêles ou fourneaux brûlant des combustibles solides
A catalyst includes a carrier of essentially hafnia, up to an equal part zirconia, and optionally additional stabilizers, upon the surface of which is deposited an active metal suitable to promote the reaction of propellants to be used in gas generators and thrusters.
B01J 21/06 - Silicium, titane, zirconium ou hafnium; Leurs oxydes ou hydroxydes
B01J 23/46 - Ruthénium, rhodium, osmium ou iridium
B01J 23/10 - Catalyseurs contenant des métaux, oxydes ou hydroxydes métalliques non prévus dans le groupe des terres rares
B01J 19/26 - Réacteurs du type à injecteur, c. à d. dans lesquels la distribution des réactifs de départ dans le réacteur est effectuée par introduction ou injection au moyen d'injecteurs