An assembly for a papermaking machine includes: a seal strip with an upper surface configured to provide a seal for a suction roll; a seal strip holder, the seal strip residing in the seal strip holder and movable relative thereto; and a wear monitoring system. The wear monitoring system may include a magnet and magnetic field sensors or an ultrasonic transducer to monitor movement of the seal strip relative to the holder, thereby indicating wear.
D21F 3/10 - Rouleaux aspirants, p.ex. rouleaux de couchage
G01B 17/02 - Dispositions pour la mesure caractérisées par l'utilisation de vibrations infrasonores, sonores ou ultrasonores pour mesurer l'épaisseur
G01B 17/04 - Dispositions pour la mesure caractérisées par l'utilisation de vibrations infrasonores, sonores ou ultrasonores pour mesurer la déformation dans un solide, p.ex. par corde vibrante
G01J 5/00 - Pyrométrie des radiations, p.ex. thermométrie infrarouge ou optique
G01J 5/10 - Pyrométrie des radiations, p.ex. thermométrie infrarouge ou optique en utilisant des détecteurs électriques de radiations
2.
SUCTION ROLL SEAL STRIP MONITOR AND LUBRICATION WATER CONTROL SYSTEM
Features of the described system can provide methods to measure strip temperature, strip wear and a method to purge clogged lubrication shower nozzles with an electronic multi- microprocessor based measurement and control system. Features to gauge the strip movement and also pilot bearing temperature and vibration are also described. In an embodiment, a suction roll is provided, including: a cylindrical shell; a suction box in the lumen of the shell; a suction source operatively connected with the suction box; at least one seal strip attached to the suction box and configured to assist in forming a seal between the suction box and the shell; first, second and third sensors attached to the seal strip and mounted on a printed circuit board; and a controller operatively connected with the sensors. The sensors are configured to convey signals to the controller, the signals being processed to provide data on the seal strip on at least one of temperature, wear, vibration, and pressure.
D21F 3/10 - Rouleaux aspirants, p.ex. rouleaux de couchage
D21F 11/00 - Procédés de fabrication de longueurs continues de papier ou de carton, ou de nappe humide pour la production de panneaux de fibres, sur des machines à papier
3.
SUCTION ROLL WITH PATTERN OF THROUGH HOLES AND BLIND DRILLED HOLES THAT IMPROVES LAND DISTANCE
A cylindrical polymeric cover for an industrial roll that improves land distance includes a plurality of through holes and blind drilled holes. The through holes and blind drilled holes are arranged in a pattern in which: (a) through holes are arranged in rows that define an oblique angle relative to a plane perpendicular to a longitudinal axis of the cover; (b) through holes of one row are offset from through holes of the adjacent row, with the offset between rows defining an angle of approximately 20-40 degrees; (c) the blind drilled holes are arranged in rows between rows of through holes; (d) a slight offset between adjacent rows of blind drill holes defining an angle similar to that defined by the through holes; and (e) each of the blind drilled holes is located at the substantial center of a triangle defined by the closest three through holes.
A calender roll for a papermaking machine includes: a substantially cylindrical core; and a cover circumferentially surrounding the core. The cover comprises: a base layer circumferentially overlying the core; and a topstock layer comprising polyurethane circumferentially overlying the base layer, the topstock layer being fiber-reinforced, the polyurethane having a glass transition temperature of between about 120 and 150ºC, the topstock layer having a hardness of 70 to 90 ShD.
An industrial roll includes: a substantially cylindrical shell having an outer surface and an internal lumen; a polymeric cover circumferentially overlying the shell outer surface, wherein the shell and cover have a plurality of through holes that provide fluid communication between the lumen and the atmosphere; and a sensing system. The sensing system includes: a plurality of sensors embedded in the cover, the sensors configured to sense an operating parameter of the roll and provide signals related to the operating parameter; at least one signal-carrying member connected with at least one of the sensors, wherein the signal-carrying member includes openings that align at least partially with some of the through holes of the shell and cover; and a processor operatively associated with the sensors that processes signals provided by the sensors.
B30B 15/00 - PRESSES EN GÉNÉRAL; PRESSES NON PRÉVUES AILLEURS - Parties constitutives des presses ou accessoires de presses; Mesures auxiliaires prises en rapport avec le pressage
B30B 3/04 - Presses caractérisées par l'emploi d'organes de pression rotatifs, p.ex. rouleaux, anneaux, disques les organes rotatifs coopérant entre eux, p.ex. cônes associés
G01K 13/08 - Thermomètres spécialement adaptés à des fins spécifiques pour mesurer la température de corps solides en mouvement en mouvement rotatif
G01L 5/00 - Appareils ou procédés pour la mesure des forces, du travail, de la puissance mécanique ou du couple, spécialement adaptés à des fins spécifiques
G01L 5/04 - Appareils ou procédés pour la mesure des forces, du travail, de la puissance mécanique ou du couple, spécialement adaptés à des fins spécifiques pour la mesure de la tension dans les éléments flexibles, p.ex. dans les cordages, les câbles, les fils métalliques, les filaments, les courroies ou les bandes
6.
SUCTION ROLL WITH SENSORS FOR DETECTING OPERATIONAL PARAMETERS
An industrial roll includes: a substantially cylindrical shell having an outer surface and an internal lumen; a polymeric cover circumferentially overlying the shell outer surface, wherein the shell and cover have a plurality of through holes that provide fluid communication between the lumen and the atmosphere; and a sensing system. The sensing system includes: a plurality of sensors embedded in the cover, the sensors configured to sense an operating parameter of the roll and provide signals related to the operating parameter; at least one signal-carrying member connected with at least one of the sensors, wherein the signal-carrying member includes openings that align at least partially with some of the through holes of the shell and cover; and a processor operatively associated with the sensors that processes signals provided by the sensors.
B30B 15/00 - PRESSES EN GÉNÉRAL; PRESSES NON PRÉVUES AILLEURS - Parties constitutives des presses ou accessoires de presses; Mesures auxiliaires prises en rapport avec le pressage
B30B 3/04 - Presses caractérisées par l'emploi d'organes de pression rotatifs, p.ex. rouleaux, anneaux, disques les organes rotatifs coopérant entre eux, p.ex. cônes associés
G01L 5/00 - Appareils ou procédés pour la mesure des forces, du travail, de la puissance mécanique ou du couple, spécialement adaptés à des fins spécifiques
An industrial roll includes: a substantially cylindrical metallic core; a base layer that is adhered to and circumferentially overlies the core; and a top stock layer that circumferentially overlies the base layer. The top stock layer comprises a material having a Pusey and Jones (P&J) hardness of 35 or higher. The top stock layer includes circumferential grooves, wherein the grooves have a width/height ratio of at least 0.7.
A method of determining the rotative position of an industrial roll includes (a) providing a rotating industrial roll having a longitudinal axis, the industrial roll having mounted on one end thereof an accelerometer, the industrial roll further including a plurality of sensors; (b) determining a pre-trigger angular position of the roll based on a first gravity vector provided by the accelerometer; then (c) determining a trigger angular position of the roll based on a second gravity vector provided by the accelerometer, the magnitude of the second gravity vector differing from the magnitude of the first gravity vector by more than the magnitude of a typical noise signal; and (d) gathering data from the sensors after the roll has passed the trigger angular position; and (e) matching data gathered in step (d) with a respective sensor of the plurality of sensors based on the determination of the trigger angular position.
D21G 9/00 - Autres accessoires pour machines à fabriquer le papier
G01D 5/02 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensible; Moyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminé; Transducteurs non spécialement adaptés à une variable particulière utilisant des moyens mécaniques
The present invention relates generally to an industrial roll, particularly to papermaking roll covers that have different balances of properties, particularly sheet release and water diffusion. The industrial roll comprises: a substantially cylindrical metallic core; a base layer that is adhered to and circumferentially overlies the core; a polymeric topstock layer that circumferentially overlies the base layer. In some embodiments, a hydrophobic or amphiphobic coating circumferentially overlies the topstock layer; wherein the polymeric topstock layer comprises polyurethane and the hydrophobic or amphiphobic coating comprises a hydrophobic or amphiphobic compound and a matrix material comprising polyurethane. In some embodiments, the topstock layer comprises a plurality of recesses having an interior surface coated with a hydrophobic or amphiphobic coating. In some embodiments, a method of constructing the industrial roll includes applying a bi-layer over the base layer, the bi-layer comprising the topstock layer and the hydrophobic or amphiphobic coating.
A method of determining the angular position of a roll includes: (a) detecting signals generated by an accelerometer attached to an end of a rotating roll; (b) determining whether a signal generated in step (a) has reached a pre-trigger threshold, and repeating step (a) if the signal has not reached the pre-trigger threshold; (c) if the signal is determined in step (b) to have reached the pre-trigger threshold, detecting a subsequent signal generated by the accelerometer; (d) determining whether the signal detected in step (c) has reached a trigger threshold, and repeating step (c) if the signal has not reached the trigger threshold; and (e) if the signal has reached the trigger threshold, establishing the angular position of the roll based on the signal that has reached the trigger threshold.
A method of determining the width of a nip formed by an industrial roll and a mating structure includes: providing an industrial roll having a cylindrical core, a polymeric cover surrounding the core and a plurality of pressure sensors mounted in the roll. The industrial roll is positioned in contact with the mating structure to form a nip and the industrial roll is rotated. Pressure signals are received from the pressure sensors at a controller. The pressure signals are utilized to determine the width of the nip at locations on the roll. The pressure signals are used to determine the peak pressure for a sensor, two signals are identified that correspond to a pressure level that is less than the peak and a partial nip width is calculated from the two signals, and the partial nip width is multiplied by multiplier to determine an estimated nip width.
G01B 7/04 - Dispositions pour la mesure caractérisées par l'utilisation de techniques électriques ou magnétiques pour mesurer la longueur, la largeur ou l'épaisseur spécialement adaptés pour mesurer la longueur ou la largeur d'objets en mouvement
G01L 5/00 - Appareils ou procédés pour la mesure des forces, du travail, de la puissance mécanique ou du couple, spécialement adaptés à des fins spécifiques
G01L 5/04 - Appareils ou procédés pour la mesure des forces, du travail, de la puissance mécanique ou du couple, spécialement adaptés à des fins spécifiques pour la mesure de la tension dans les éléments flexibles, p.ex. dans les cordages, les câbles, les fils métalliques, les filaments, les courroies ou les bandes
An industrial roll includes: a substantially cylindrical core having an outer surface; a polymeric cover circumferentially overlying the core outer surface; and a sensing system. The sensing system includes: a first signal carrying member serially connecting a first set of sensors; a second signal carrying member serially connecting a second set of sensors; and a signal processing unit operatively associated with the first and second signal carrying members and configured to selectively monitor the signals provided by the first and second set of sensors.
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