Abrégé

The invention relates to an axial piston machine in which pistons carry out a stroke movement in cylinders and in which the pistons have a seal ring receptacle for a seal ring. In order to improve robustness, wear resistance, friction and stick-slip behavior, according to the invention, the seal ring is spherical, wherein the curvature radius of the seal ring, which is spherical in regions, substantially corresponds to half the diameter of the cylinder inner wall.

Classes IPC  ?

• F03C 1/28 - Pistons spécialement adaptés à ces machines motrices
• F04B 1/124 - Pistons
• F04B 53/14 - Pistons, tiges de piston ou liaisons piston-tige

Abrégé

The present invention relates to a method for determining a present state of wear of a hydrostatic machine during the operation of the hydrostatic machine. The hydrostatic machine comprises a drive with variable rotational speed and comprises a hydrostatic pump, wherein the drive is designed to drive the hydrostatic pump in order to generate a volume flow of a fluid, and wherein the hydrostatic machine is connected to a fluid transport channel in which the fluid is transported in a manner driven by the hydrostatic machine. The method has a step for determining a first torque of the drive in the case of a specified drive vector. Furthermore, the method has a step for ascertaining a second torque of the drive in the case of the specified drive vector using a first calculation method, and furthermore, the method has a step for determining the present state of wear of the hydrostatic machine using a second calculation method in order to correlate the first determined torque with the second ascertained torque.

Classes IPC  ?

• F16H 57/01 - Surveillance de l'usure ou de la sollicitation des éléments de transmission, p.ex. pour déclencher les opérations de maintenance
• F04B 51/00 - Tests des "machines", pompes ou installations de pompage

Abrégé

The present invention relates to an electrohydrostatic system having a hydraulic cylinder comprising a first cylinder chamber and a second cylinder chamber. Furthermore, the electrohydrostatic system has a fluid hydraulic supply device for providing a hydraulic fluid, a fluid hydraulic motor pump unit designed to provide a fluid hydraulic volume flow in order to move the hydraulic cylinder. A motor control device is designed to provide a rated current for an electrical drive of the fluid hydraulic motor pump unit. Moreover, the electrohydrostatic system has at least one fluid hydraulic safety valve, which on a first valve side is connected to one of the cylinder chambers of the hydraulic cylinder and on a second valve side is connected to the fluid hydraulic motor pump unit. The fluid hydraulic safety valve can be bridged via a bypass connection with a fixed orifice plate, the bypass connection being connected to the first valve side and to the second valve side of the at least one fluid hydraulic safety valve. Moreover, the electrohydrostatic system has a pressure sensor which is connected to one of the cylinder chambers of the hydraulic cylinder. The pressure sensor is designed to detect a fluid hydraulic pressure on one of the cylinder chambers and, according to the detected fluid hydraulic pressure, to provide an enabling signal for the motor control device to provide the rated current for the electrical drive of the fluid hydraulic motor pump unit.

Classes IPC  ?

• B30B 15/20 - Commande des presses actionnées pneumatiquement commandant le mouvement alternatif du pilon commandant la vitesse du pilon, p.ex. vitesse d'approche, de la course de pressage ou de la course de retour
• B30B 15/28 - Dispositions pour empêcher la déformation ou l'avarie des presses ou des parties de presses
• F15B 11/00 - Systèmes de servomoteurs dépourvus d'asservissement
• F15B 13/01 - Clapets de blocage ou autres dispositifs de détente

Abrégé

An electro-hydrostatic actuation system and a method for driving a hydraulic actuator, e.g. a hydraulic cylinder, are described, wherein the system comprising a leakage branch, and wherein preferably an additional pump is arranged. The system further comprises a source for providing hydraulic liquid; a high-pressure circuit to direct the hydraulic liquid to a hydraulic actuator, such as e.g. a hydraulic cylinder; a low-pressure circuit having several branches; a main pump for hydraulic liquid arranged in the high-pressure circuit, comprising a housing having a high-pressure section and a low-pressure section, separated by gap sealings, wherein the high-pressure section comprises a first outlet and a second outlet to provide the hydraulic liquid flow in the high-pressure circuit; and wherein the low- pressure section comprises a leakage outlet; an electric motor driving the main pump.

Classes IPC  ?

• F15B 7/00 - Systèmes de manœuvre utilisant la pression d'un fluide dans lesquels le mouvement produit est lié de façon définie au débit d'une pompe volumétrique; Télémoteurs
• F15B 19/00 - Test des systèmes ou appareils de manœuvre utilisant la pression d'un fluide, dans la mesure où ils ne sont pas prévus ailleurs
• F04B 17/03 - Pompes caractérisées par leur combinaison avec des machines motrices ou moteurs particuliers qui les entraînent ou par leur adaptation à ceux-ci entraînées par des moteurs électriques

Abrégé

The invention relates to a device and a method for open-open or closed-loop control of a movement of a die cushion of a die cushion press. The device has an control value encoder (11), a speed controller (12), a current controller (13) and a motor control device (14) for providing a nominal current for an electrical drive (15) of a fluid-hydraulic motor pump unit (20) for moving a die cushion of a die cushion press. The control value encoder (11) is provided in order to calculate a setpoint speed based on a die cushion control value command and a piece of die cushion information. The speed controller (12) calculates a setpoint current based on the setpoint speed. The current controller (13) calculates a control signal based on the setpoint current, and the motor control device (14) calculates the nominal current based on the control current. According to the invention, the dynamics of the control of the electrical machine can thus be improved.

Classes IPC  ?

• H02P 27/08 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de tension d'alimentation utilisant une tension d’alimentation à fréquence variable, p.ex. tension d’alimentation d’onduleurs ou de convertisseurs utilisant des convertisseurs de courant continu en courant alternatif ou des onduleurs avec modulation de largeur d'impulsions
• H02P 23/16 - Commande de la vitesse angulaire d’un arbre
• H02P 25/00 - Dispositions ou procédés pour la commande de moteurs à courant alternatif caractérisés par le type de moteur ou par des détails de structure
• B21D 24/14 - Dispositifs commandant ou manœuvrant les serre-flans indépendamment, ou en relation avec les matrices pneumatiquement ou hydrauliquement
• F04B 17/03 - Pompes caractérisées par leur combinaison avec des machines motrices ou moteurs particuliers qui les entraînent ou par leur adaptation à ceux-ci entraînées par des moteurs électriques
• F04B 49/08 - Régulation par la pression de refoulement
• F04B 49/20 - Commande des "machines", pompes ou installations de pompage ou mesures de sécurité les concernant non prévues dans les groupes ou présentant un intérêt autre que celui visé par ces groupes en modifiant la vitesse d'entraînement

Abrégé

The invention relates to a radial reciprocating engine (1) having cylinders (5) arranged in a cylinder carrier (16) and a piston element (21) arranged in every cylinder (6), which piston element is connected to a guide element (22), wherein the guide element (22) runs on a sliding surface (14), as a result of which a stroke movement is imposed on the piston element (21). Because the piston element (21) is spherical, at least in the region of the piston element (21) which effects a seal during the stroke movements on inner walls (51) of the cylinder (5), a linear seal is created which allows a more compact design compared to radial pumps having cylindrical piston elements.

Classes IPC  ?

• F04B 1/0404 - "Machines" ou pompes multicylindres caractérisées par le nombre ou la disposition des cylindres ayant des cylindres disposés en étoile ou en éventail - Détails ou parties constitutives
• F04B 1/0408 - Pistons
• F04B 1/0413 - Cames
• F04B 1/0426 - Agencements pour presser les pistons contre la came actionnée; Agencements pour connecter les pistons à la came actionnée
• F04B 1/1071 - "Machines" ou pompes multicylindres caractérisées par le nombre ou la disposition des cylindres ayant des cylindres disposés en étoile ou en éventail les cylindres étant mobiles, p.ex. rotatifs avec des éléments actionnants ou actionnés aux extrémités extérieures des cylindres avec des blocs-cylindres rotatifs

Abrégé

The hydraulic system according to the invention comprises: a hydraulic circuit with a low-pressure region and a high-pressure region; and a volume- and/or speed-variable hydraulic machine, which is driven by a first electric motor and which has an inlet and an outlet and provides a volume flow of a hydraulic fluid in the high-pressure region of the hydraulic circuit. The hydraulic system according to the invention further comprises: at least one movable shaft, which is arranged in the high-pressure region of the hydraulic circuit; at least one valve, which separates the high-pressure region from the low-pressure region; and at least one hydraulic fluid container, which is hydraulically connected to the low-pressure region of the hydraulic circuit. The hydraulic system according to the invention also has a discharge line, which discharges hydraulic fluid from the leakage of the hydraulic machine, and a cooling line for transporting the hydraulic fluid in order to cool the electric motor, the discharge line and the cooling line being fluidically connected to at least one of the hydraulic fluid containers.

Classes IPC  ?

• F15B 21/0423 - Refroidissement
• F15B 21/04 - Mesures particulières prises en rapport avec les propriétés du fluide
• F15B 7/00 - Systèmes de manœuvre utilisant la pression d'un fluide dans lesquels le mouvement produit est lié de façon définie au débit d'une pompe volumétrique; Télémoteurs

Abrégé

The invention relates to a hydraulic system for controlling a stabiliser drive, in particular for controlling an angle of attack and/or controlling the pivoting out and in of a stabiliser wing, preferably for ships. The hydraulic system according to the invention comprises: a rotary vane motor which changes the angle of attack of the stabiliser wing; and/or a hydraulic cylinder for pivoting the stabiliser wing out and in. The hydraulic system also comprises a first hydraulic circuit. The first hydraulic circuit also comprises a low-pressure circuit and a high-pressure circuit, a device for providing an admission pressure of the low-pressure circuit, and two anti-cavitation valves which separate the first low-pressure circuit from the first high-pressure circuit. The hydraulic system according to the invention is also characterised in that a first hydraulic pump which is driven by an electric motor and has two connections is integrated in the high-pressure circuit and is hydraulically connected to the rotary vane motor and/or the hydraulic cylinder.

Classes IPC  ?

• F15B 11/16 - Systèmes de servomoteurs dépourvus d'asservissement avec plusieurs servomoteurs

Abrégé

Electrohydrostatic drive with an electromechanical drive with a rotating drive shaft and a first receiving unit, wherein the electromechanical drive is arranged in the first receiving unit. Furthermore, the electrohydrostatic drive comprises a pump unit and a second receiving unit, wherein the pump unit is arranged in the second receiving unit and the second receiving unit contains a transport fluid, and the first receiving unit and the second receiving unit are arranged in contact with one another, with the result that the electromechanical drive and the pump unit are connected to one another via the drive shaft. In addition, the electromechanical drive comprises a slide ring seal, wherein the slide ring seal is arranged along the direction of extent of the drive shaft, between the electromechanical drive and the pump unit, in such a way that the first receiving unit with the electromechanical drive and the second receiving unit with the pump unit are connected along the rotating drive shaft in a fluid-tight manner with respect to one another by way of the slide ring seal.

Classes IPC  ?

• F04B 1/0448 - Joints d’étanchéité, p.ex. des arbres ou des carters
• F04B 17/03 - Pompes caractérisées par leur combinaison avec des machines motrices ou moteurs particuliers qui les entraînent ou par leur adaptation à ceux-ci entraînées par des moteurs électriques
• F04B 53/16 - Carcasses d'enveloppe; Cylindres; Chemises de cylindre ou culasses; Connexions des tubulures pour fluide
• F16J 15/34 - Joints d'étanchéité entre deux surfaces mobiles l'une par rapport à l'autre par bague glissante pressée contre la face plus ou moins radiale d'une des deux parties

Abrégé

An electrohydrostatic actuator system comprising: a volume- and/or speed-variable hydraulic machine which is driven by an electric motor, for providing a volumetric flow of a hydraulic fluid; a differential cylinder with a piston side and a ring side, and at least one pretensioning source. The actuator system has a closed hydraulic circuit, wherein, during operation, the hydraulic fluid in the hydraulic circuit is pressurized by means of the hydraulic machine and/or the pretensioning source. Furthermore, according to the invention, the differential cylinder provides a power motion operating mode and a rapid motion operating mode. In order to balance a volume of the hydraulic fluid in the closed hydraulic circuit, according to the invention an expansion reservoir is connected to the piston side of the differential cylinder via a valve.

Classes IPC  ?

• F15B 1/26 - Réservoirs d'alimentation ou de pompage
• F15B 7/00 - Systèmes de manœuvre utilisant la pression d'un fluide dans lesquels le mouvement produit est lié de façon définie au débit d'une pompe volumétrique; Télémoteurs
• F15B 11/17 - Systèmes de servomoteurs dépourvus d'asservissement avec plusieurs servomoteurs utilisant plusieurs pompes

Abrégé

The invention relates to an extrusion press (10, 20, 30) with a press cylinder (111), which is driven by a electro-hydrostatic control system (104) for a power mode and is connected to a separate drive (120) for a speed mode, a detector (115), which is connected to a hydraulic cylinder (117) for the power mode and to an additional separate drive (119, 300) for the speed mode, and a hydraulic cylinder (101) with a blocking device (103) for the drive of a shearing tool (102), wherein the hydraulic cylinder (101) is connected to the electro-hydrostatic control system (104), and the press cylinder (111), in the power mode, and the hydraulic cylinder (101) for the drive of the shearing tool (102) are controlled in an alternating manner via the common electro-hydrostatic control system (104).

Classes IPC  ?

• B21C 23/21 - Presses spécialement adaptées à l'extrusion du métal
• B21C 35/04 - Coupage ou enlèvement des déchets

Abrégé

The invention relates to a press drive, such as those used in powder presses for example. A system according to the invention comprises an electro-hydrostatic actuator system (10) for a press drive, having an upper piston (100) with a press surface (120), which acts from a first direction, wherein the press surface (120) of the upper piston (100) is actuated by means of a piston rod (118) in a hydraulic cylinder (110) of the upper piston (100) and traverses a first distance during a press run, and a first electro-hydrostatic actuator (130) for driving the upper piston (100), comprising a first pump (132) and a first motor generator (134) which is actuated by a first controller (140). The system additionally comprises at least one auxiliary piston (200) with a press surface (220), which acts from a second direction opposite the first direction, wherein the press surface (220) of the auxiliary piston (200) is actuated by means of a piston rod (218) in a hydraulic cylinder (210) of the auxiliary piston (100) and traverses a second distance during the press run, and a second electro-hydrostatic actuator (230) for driving the at least one auxiliary piston (200), comprising a second pump (232) and a second motor generator (234) which is actuated by a second controller (240). The system is characterized in that the second motor generator (234) of the second electro-hydrostatic actuator (230) is operated as a generator during the press run, thereby generating energy which is provided to the first motor generator or auxiliary piston that is being operated as the motor via a common DC bus.

Classes IPC  ?

• B30B 15/16 - Commande des presses actionnées pneumatiquement

Abrégé

The present invention relates to an actuating drive having a variable-speed pump, as used, for example, in steam turbines, gas turbines and die casting machines. The electrohydrostatic actuating drive (10) has a variable-volume and/or variable-speed hydraulic machine which is driven by an electric motor, for the provision of a volumetric flow of a hydraulic fluid. Furthermore, the actuating drive comprises a cylinder (200) with a piston (210), a piston rod (230) and a first piston chamber (220), a valve (100) with a first position and a second position, which valve (100) can be moved by a first hydraulic actuator into the first position and by a second hydraulic actuator into the second position, wherein the second position controls a greater volumetric flow of the hydraulic fluid than the first position, a sink, a main line (130, 160) which connects a first piston chamber (220) of the cylinder (200) to the sink and in which the hydraulic machine (50) is arranged, an auxiliary line (110, 120) which connects the first piston chamber (220) to the sink and in which the valve (100) is arranged, a first control line (140) to the first hydraulic actuator, and a second control line (150) to the second hydraulic actuator. The actuating drive is characterized in that a hydraulic resistance (180) is arranged in the main line (130, 160) in series with the hydraulic machine (50), the first control line (140) is connected at the main line (130, 160), and the second control line (150) is connected between the hydraulic resistance (180) and the first piston chamber (220).

Classes IPC  ?

• F15B 11/08 - Systèmes de servomoteurs dépourvus d'asservissement avec un seul servomoteur
• F01D 21/18 - Modificateur instantané utilisant des dispositifs hydrauliques

Abrégé

The present invention relates to hydraulic presses that has an electro-hydrostatic drive (10) for realizing a rapid movement and a force-building movement, comprising a hydro-machine (50) with variable volume and/or rotational speed, driven by an electric motor (60), for furnishing / providing a volume-flow of a hydraulic fluid, a first cylinder (100) with a housing (105), a piston (110), a cylinder rod (122), and a first (120) and a second (130) cylinder chamber, a second cylinder (200) with a piston (210), a cylinder rod (222), and a first (220) and a second (230) cylinder chamber, a moveable carrier plate (430), a pillar (410), and a clamping apparatus (390) to clamp and/or unclamp the first cylinder (100) to the pillar (410), where the hydraulic drive (10) has a closed hydraulic circuit, which has, when run, a positive pressure above atmospheric pressure and which, by means of the hydro- machine (50), can pressurize either the first (120) or the second (130) cylinder chamber of the first cylinder (100) and/or the first (220) or the second (230) cylinder chamber of the second cylinder (200). The invention is characterized in that the moveable carrier plate (430) is connected both to the first cylinder (100) and to the second cylinder (200), for the force-building movement, the first cylinder (100) is clamped, by the clamping apparatus (390), to the pillar (410) and one cylinder chamber (120, 130) of the first cylinder (100) is pressurized with the hydraulic fluid, and for the rapid movement, the first cylinder (100) is undamped, by the clamping apparatus (390), from the pillar (410) and one cylinder chamber (220, 230) of the second cylinder (200) is pressurized with the hydraulic fluid.

Classes IPC  ?

• B30B 1/32 - Presses, utilisant un élément pilonnant, caractérisées par le mode d'entraînement du pilon, la pression étant transmise au pilon ou à la platine de presse directement ou uniquement par l'intermédiaire d'organes travaillant en simple poussée ou tracti par des plongeurs sous pression de fluide
• B29C 45/67 - Dispositifs d'ouverture, de fermeture ou de serrage des moules hydrauliques
• B30B 15/16 - Commande des presses actionnées pneumatiquement

Abrégé

The invention relates to a worm drive comprising a worm shaft and a first receiving unit. The worm shaft is rotatably mounted in the first receiving unit. Furthermore, the worm drive comprises a worm wheel and a second receiving unit. The worm wheel is rotatably mounted in the second receiving unit. The first receiving unit is arranged on the second receiving unit and the rotatably mounted worm shaft is in contact with the worm wheel of the second receiving unit in order to transmit a torque. Furthermore, the worm drive comprises guide pins for detachably connecting the first receiving unit to the second receiving unit. More particularly, the first receiving unit receives at least part of the guide pins and the second receiving unit is connected to one of the guide pins, preferably to a first end of the guide pin. A spring element is arranged on a second end of the guide pin between the first receiving unit and a fastening means.

Classes IPC  ?

• F16H 57/039 - Boîtes de vitesses pour engrenages à vis sans fin
• F16H 57/12 - Dispositions non prévues ailleurs pour ajuster ou pour reprendre le jeu
• F16H 57/022 - Ajustement d'arbres ou de paliers de transmission

Abrégé

actcomp)actcompcomp).

Classes IPC  ?

• F04B 49/06 - Commande utilisant l'électricité

Abrégé

An apparatus according to the present invention is an electro-hydrostatic drive for realizing a rapid movement during a rapid movement phase, a force-building movement during a force-building movement phase. The apparatus comprises a hydro-machine (50) with variable volume and/or rotational speed, driven by an electric motor (60), for providing a volume-stream of a hydraulic fluid, a first cylinder (100) with a piston chamber (120), a rod chamber (130), and a plunger rod (132), a reservoir (200), a pressure source (400), a relief valve (480), a check valve (430), a fluid connection (125) between the piston chamber (120) and the hydro-machine (50), a fluid connection (135) between the rod chamber (130) and the hydro-machine (50), a fluid connection (125, 236, 235) between the piston chamber (120) and the reservoir (200), a fluid connection (237, 235) between the rod-chamber-side port of the hydro-machine (50) and the reservoir (200), a fluid connection, through the relief valve (480), between the reservoir (200) and the pressure source (400). The apparatus is characterized in that the relief valve (480) is for pressure safety of the reservoir (200), and the check valve (430) has a fluid connection from the pressure source (400) to the rod-chamber-side port of the hydro-machine (50), during the rapid movement phase, a first part of the hydraulic fluid is piped through the fluid connection (125) between the piston chamber (120) and the hydro-machine (50) and the fluid connection (135) between the rod chamber (130) and the hydro-machine (50), and a second part of the hydraulic fluid communicates through the fluid connection (125, 236, 235) between the piston chamber (120) and the reservoir (200), during the force-building movement phase, a first part of the hydraulic fluid is piped through the fluid connection (125) between the piston chamber (120) and the hydro-machine (50) and the fluid connection (135) between the rod chamber (130) and the hydro-machine (50), and a second part of the hydraulic fluid is piped through the fluid connection (237, 235) between the rod-chamber-side port of the hydro-machine (50) and the reservoir (200).

Classes IPC  ?

• B30B 15/16 - Commande des presses actionnées pneumatiquement
• B30B 15/18 - Commande des presses actionnées pneumatiquement commandant le mouvement alternatif du pilon
• F15B 11/02 - Systèmes comportant essentiellement des moyens particuliers pour commander la vitesse ou la puissance d'un organe de sortie

Abrégé

The invention relates to an electro-hydrostatic system (1) comprising a hydraulic machine (11) which is driven by an electric motor (10) and has a variable volume and/or rotational speed for providing a volumetric flow rate of a hydraulic fluid, a differential cylinder (20) with a piston surface and with an annular surface, and at least one equalization container (30, 37). The drive system (1) has a closed hydraulic circuit and an overpressure relative to the surroundings during operation by means of the hydraulic machine (11) and/or a pretensioning source (15, 37). The drive system (1) provides a movement of the cylinder in a first direction by means of a volumetric flow rate of the hydraulic machine (11) and a volumetric flow rate from the equalization container (30, 37) and a movement in a second direction by means of a volumetric flow rate of the hydraulic machine (11) and a volumetric flow rate into the equalization container (30, 37). A speed operating mode and a power operating mode are provided by the differential cylinder (20).

Classes IPC  ?

• F15B 7/00 - Systèmes de manœuvre utilisant la pression d'un fluide dans lesquels le mouvement produit est lié de façon définie au débit d'une pompe volumétrique; Télémoteurs
• B30B 15/16 - Commande des presses actionnées pneumatiquement
• B30B 15/20 - Commande des presses actionnées pneumatiquement commandant le mouvement alternatif du pilon commandant la vitesse du pilon, p.ex. vitesse d'approche, de la course de pressage ou de la course de retour

Abrégé

The invention relates to a safe hydraulic drive system and a process for operating such a drive system, moving a piston rod (23) of at least one cylinder (2), comprising at least one first cylinder chamber (21) and a second, separate cylinder chamber (22), which are connected to one another via a connecting line (3) to form a fluid-filled hydraulic circuit, and a hydraulic drive (4) for conveying (UN, US) the fluid (F) from one cylinder chamber (21, 22), via the connecting line (3), into the other cylinder chamber (21, 22), in which the connecting line (3) is arranged, wherein the connecting line (3) has at least one parallel system, between the hydraulic drive (4) and one of the two cylinder chambers (21, 22), consisting of at least one first sub-connection (31) with at least one first stop valve (311) and a second sub-connection (32) with a baffle (322) arranged therein, wherein the connecting line (3), excluding the second sub-connection (32), has a first flow resistance and the second sub-connection has a second flow resistance due to the baffle (322) arranged therein, which is greater than the first flow resistance for the fluid (F), wherein the drive system (1) is provided with at least one open first stop valve (311) in normal mode (N) and with a closed first stop valve (311) in safe mode (S) for conveying (UN) the fluid (F), and a suitably high second flow resistance has been selected so that a maximum permissible speed for the piston rod (23) is not exceeded in safe mode (S), even when an external force (FG) acts on the drive system (1) in the direction of movement (B) of the piston rod (23).

Classes IPC  ?

• F15B 20/00 - Dispositions propres à la sécurité pour systèmes de manœuvre utilisant les fluides; Utilisation des dispositifs de sécurité dans les systèmes de manœuvre utilisant des fluides; Mesures d'urgence pour les systèmes de manœuvre utilisant des fluides
• F15B 11/04 - Systèmes comportant essentiellement des moyens particuliers pour commander la vitesse ou la puissance d'un organe de sortie pour commander la vitesse

Abrégé

This invention is about an apparatus (10) for measuring a hydraulic pressure of a hydraulic component (200), comprising a pressure sensor module (100) and a mounting plate (210), that is either an outer contour of the hydraulic component (200) or is connectable with the hydraulic component (200) in a substance-to-substance, form-locking and/or force-locking manner, wherein the pressure sensor module (100) comprises a housing (110), at least one pressure sensor (190) for determining the pressure of a fluid, at least one fluid connector (130) for hydraulic connection of the hydraulic component (200), at least one electrical connector comprising a conductive mating surface (125); the mounting plate (210) has a basic area (211) and at least one electrical connecting pin (222), whereby the connecting pin (222) spring loaded and is essentially perpendicular to the basic area (211) of the mounting plate (210), the first end (223) of the connecting pin (222) is oriented towards the basic area (211), the second end (224) of the connecting pin (222) is oriented away from the basic area (211), and the second end (224) of the connecting pin (222) is pressed, by means of an elastic element, away from the basic area (211) and towards the electrical connector (125) when the mounting plate (210) and the pressure sensor module (100) are assembled and the pressure sensor module (100) and/or the mounting plate (210) have at least one guiding element (341). The invention is characterized in that the pressure sensor (190), the fluid connector (130) and the electrical connector (125) are arranged within the housing (110), the mounting plate (210) is connectable with the pressure sensor module (100) in a force-locking manner and when the mounting plate (210) and the pressure sensor module (100) are assembled, the electrical connecting pin (222) is connected with the electrical connector (125) via its second end (224).

Classes IPC  ?

• G01L 19/00 - MESURE DES FORCES, DES CONTRAINTES, DES COUPLES, DU TRAVAIL, DE LA PUISSANCE MÉCANIQUE, DU RENDEMENT MÉCANIQUE OU DE LA PRESSION DES FLUIDES - Détails ou accessoires des appareils pour la mesure de la pression permanente ou quasi permanente d'un milieu fluent dans la mesure où ces détails ou accessoires ne sont pas particuliers à des types particuliers de manomètres

Abrégé

The invention relates to a hydraulic drive (1) comprising a working cylinder (2) and a travel cylinder (3) which is mechanically connected to the working cylinder (2). The working cylinder (2) and the travel cylinder (3) each comprise an upper and a lower cylinder chamber (21, 22, 31, 32), and all four cylinder chambers (21, 22, 31, 32) of the working and travel cylinder (2, 3) are connected to one another in a suitable manner in a closed pressure circuit (4) which is filled and prestressed with a hydraulic fluid (F). A rotational speed-variable hydraulic machine (5) with a first and second pressure connection (51, 52) is arranged in the pressure circuit (4) in order to conduct the hydraulic fluid (F) between the individual cylinder chambers (21, 22, 31, 32) of the working and travel cylinder (2, 3) during the operation (B) of the hydraulic drive (1). At least one first and second distributing valve (6, 7) are arranged in the pressure circuit (4) such that the respective valve switch positions (61, 62, 71, 72, 73) which are suitable for the different operating phases of the hydraulic drive (1) together with the suitably driven hydraulic machine (5) allow a common movement of the work and travel cylinder (2, 3) in one or the other piston movement direction (R1, R2). For this purpose, preferably only the first and the second distributing valve (6, 7) are arranged in the pressure circuit (4). The hydraulic drive (1) requires a minimum number of components, maintains a low installation complexity, improves the energy efficiency, can be constructed in a compact manner, and can be operated in a sufficiently variable manner.

Classes IPC  ?

• F15B 11/02 - Systèmes comportant essentiellement des moyens particuliers pour commander la vitesse ou la puissance d'un organe de sortie
• B30B 15/16 - Commande des presses actionnées pneumatiquement
• F15B 11/036 - Systèmes comportant essentiellement des moyens particuliers pour commander la vitesse ou la puissance d'un organe de sortie pour régler la puissance au moyen de servomoteurs comportant plusieurs chambres de travail

Abrégé

The invention relates to a hydrostatic radial piston machine, in particular a hydrostatic radial piston machine for actuating a differential cylinder. According to the invention, the hydrostatic machine of radial piston design has a control pin in a housing, wherein the hydrostatic machine has three hydraulic working connectors. The first working connector can be connected to the piston side of a differential cylinder, whereas the second working connector can be connected to the rod side of the differential cylinder. Finally, the third working connector can be connected to a tank. As a result of this arrangement, the differential cylinder can be operated directly with the aid of a single hydrostatic machine, wherein the connection of proportional or regulating valves in between can be dispensed with.

Classes IPC  ?

• F04B 1/04 - "Machines" ou pompes multicylindres caractérisées par le nombre ou la disposition des cylindres ayant des cylindres disposés en étoile ou en éventail
• F04B 1/047 - "Machines" ou pompes multicylindres caractérisées par le nombre ou la disposition des cylindres ayant des cylindres disposés en étoile ou en éventail avec des éléments actionnants ou actionnés aux extrémités extérieures des cylindres
• F04B 1/053 - "Machines" ou pompes multicylindres caractérisées par le nombre ou la disposition des cylindres ayant des cylindres disposés en étoile ou en éventail avec des éléments actionnants ou actionnés aux extrémités intérieures des cylindres
• F04B 1/06 - Commande
• F03C 1/36 - Organes de distribution cylindriques
• F03C 1/34 - Organes de distribution spécialement adaptés à des machines motrices à cylindres multiples
• F03C 1/40 - Commande spécialement adaptée à ces machines motrices
• F03C 1/047 - Machines motrices à liquide à pistons alternatifs avec des cylindres multiples et caractérisées par le nombre ou la disposition des cylindres avec cylindres disposés en étoile ou en éventail les moyens coopérant avec un élément actionné aux extrémités extérieures des cylindres
• F03C 1/053 - Machines motrices à liquide à pistons alternatifs avec des cylindres multiples et caractérisées par le nombre ou la disposition des cylindres avec cylindres disposés en étoile ou en éventail les moyens coopérant avec un élément actionné aux extrémités intérieures des cylindres

Abrégé

Disclosed is a fail-safe fluidic actuation system (1) having a safety position, comprising a control element (2) having at least one first and one second chamber (3, 4); having a working circuit (5) with a motor/pump device (6), wherein the control element can be actuated by means of the working circuit at least in the operational state. Furthermore, the actuating system comprises a discharge valve (9) which, in a failure state, is placed into a pass-through position in order to discharge fluid from the second chamber, and the safety circuit is designed such that, in the operational state, an inflow decoupled from the store can be generated into the control element by means of the working circuit with the motor/pump device, wherein by means of the safety circuit, in a failure state, an inflow fully decoupled from the working circuit with the motor/pump device is provided into the first chamber by means of the store, wherein the control element has three chambers, and wherein the safety circuit is designed such that, in the operational state, an inflow decoupled from the store can be generated into the third chamber (15) by means of the working circuit with the motor/pump device.

Classes IPC  ?

• F15B 20/00 - Dispositions propres à la sécurité pour systèmes de manœuvre utilisant les fluides; Utilisation des dispositifs de sécurité dans les systèmes de manœuvre utilisant des fluides; Mesures d'urgence pour les systèmes de manœuvre utilisant des fluides
• F03D 7/04 - Commande automatique; Régulation