Abstract: A shaft current collector for a shaft assembly has a shaft and a machine part surrounding the shaft. The shaft current collector has an electrically conductive ring for arrangement on the shaft so as to electrically contact the same. The ring has an engagement recess which is arranged so as to extend axially relative to the central axis of the ring. A blocking element can be secured on the machine part relative to the shaft. When the shaft current collector is in the installed state, the blocking element engages into the engagement recess of the ring such that, as the shaft rotates, a rotation of the ring is restricted by the blocking element while the ring is electrically conductively contacted by the blocking element. A shaft assembly may have such a shaft current collector.

Abstract: A shaft sealing ring for sealing off a media side from an outer side of a shaft arrangement is disclosed. A sealing portion, in the operating state, extends along a sealing axis, and has a running surface for dynamic sealing contact with a sealing surface of a machine part of the shaft arrangement. The sealing portion is provided with a plurality of profile grooves, which are each laterally delimited by a first lateral flank, which is arranged on the media side during operational use of the shaft sealing ring. A second lateral flank is arranged on the ambient side during operational use. The profile grooves have a flow cross section with maxima and minima for a lubricating medium. Each minimum of the flow cross section of a profile groove is arranged substantially in alignment with a maximum of the flow cross section of the respectively closest profile groove.

Abstract: A shaft sealing kit for a sealing gap is formed between a shaft and a machine part engaging around the shaft. A foam ring of an elastically deformable foam material can be arranged in the sealing gap to be sealed off. The shaft sealing kit also has a kneading ring, which can be arranged in a rotationally fixed manner on the shaft and has a main body away from which there at least one cam extends which cam serves for locally compressing the foam material of the foam ring in the assembled state of the shaft sealing kit. A shaft arrangement can include a shaft sealing kit or a plurality of such shaft sealing kits.

Abstract: A sealing arrangement includes a housing, a shaft and a sealing unit. The sealing unit includes a sealing ring having a retaining section and having a sealing lip which extends outwardly from the retaining section in a direction radial to the central axis of the sealing unit and which dynamically sealingly rests against a sealing surface of a housing of the sealing arrangement. The sealing unit includes an internally tensioning clamping ring which is arranged embedded in the material of the sealing ring and secures the axial position of the retaining section in the retaining groove and ensures that the retaining section is circumferentially pretensioned and statically sealingly rests against the shaft.

Abstract: An impulse scraper and scraper arrangement for scraping a foreign body off the mating running surface of a machine part is disclosed. The impulse scraper has a holding section and a scraper lip with a scraper edge, extending around the central axis of the impulse scraper, for dynamically contacting and scraping the foreign body off the mating running surface. The scraper lip is intrinsically elastically deformable and, on its peripheral side facing away from the holding section, has one or more annular material weaknesses, each defining a predetermined bending zone of the scraper lip. The scraper lip itself forms an axial stop for a respective longitudinal segment of the scraper lip arranged distally with respect to the axial stop. Alternatively, the scraper lip is arranged on the holding section via a support element, the axial deflection movement of which relative to the holding section is limited by an axial stop.

Abstract: A slotted guide ring for a piston-cylinder unit has a first free end portion and a second free end portion, which are arranged at a distance from one another in the circumferential direction of the guide ring, forming an axial through gap, and the end faces of which are arranged parallel to one another or substantially parallel to one another. In their projection on the central axis Z, the end faces enclose an acute angle ? with the central axis Z of 15°???75°. On the guide side, a lubricant channel is formed which extends from the first free end portion to the second free end portion and which is open on both sides towards the axial through gap. The invention further relates to a piston-cylinder unit with such a guide ring.

Abstract: A sealing device has a sensor system for condition monitoring. The sealing device includes a sealing ring with a dynamic sealing section for dynamically sealing abutment at a sealing surface of a machine part and a pretensioning ring for pretensioning the sealing section against the sealing surface having a first section and a second section. The second section can be deflected in a spring-elastic manner in an axial or radial direction relative to the central axis of the sealing device from a first position relative to the first section. The sensor system includes at least one measuring element arranged in the intermediate space on the pretensioning ring, which responds indirectly or directly to a deflection movement of the first section of the pretensioning ring. A sealing arrangement may have such a sealing device.

Abstract: A pumping assembly includes a flexible tube extending along a longitudinal axis. The flexible tube defines an internal cavity extending along the longitudinal axis. The internal cavity is configured to contain a fluid disposed therein, wherein the fluid is a liquid and/or a gas. A plurality of ferromagnetic or magnetic particles are disposed within at least a portion of a thickness of the flexible tube. The plurality of ferromagnetic or magnetic particles are also disposed extending along the longitudinal axis. A plurality of electromagnets are placed in series adjacent to one another. The flexible tube is disposed adjacent to the plurality of electromagnets. A controller is configured to selectively magnetize at least one electromagnet from the plurality of electromagnets in a progression along the plurality of electromagnets, thereby compressing the tubing in a progression being a pumping action. A power source is electrically connected to the controller.

Abstract: A master piston for a hydraulic vehicle brake is arranged in a master cylinder of the hydraulic vehicle brake and is movable in a reciprocal manner along a master piston longitudinal axis. The master piston has at least one piston element and a seal which is injection molded onto the piston element. The master piston has at least one guide portion for guiding the master piston in the master cylinder. The guide portion is elastically deformable at least in some portions in a radial direction to the master piston longitudinal axis. The guide portion is formed at least partially from a different material from the piston element. The piston element, the seal and the guide portion are produced together by a multi-component injection molding method. A method for producing the master piston is disclosed.

Abstract: A seal assembly includes a first and second machine element, a seal and a support ring. The support ring has a first side edge facing a high-pressure side which is partially convexly curved, formed obliquely or is partially formed at an acute angle relative to a movement axis of the two machine elements. The seal has a retaining portion and a primary sealing lip extending from the retaining portion on the high-pressure side and abuts in a dynamically sealing manner against a sealing surface of the second machine element. The primary sealing lip directly abuts and is supported over the majority of its longitudinal extent on the first side edge of the support ring on the low-pressure side. The retaining section of the seal is held clamped between the support ring and the first machine element and abuts the first machine element in a statically or indirectly statically sealing manner.

Abstract: A rotary seal arrangement includes a first machine part being a shaft and a second machine part encompassing the shaft. The first and second machine parts are spaced apart and rotatable relative to one another forming a sealing gap. A seal holding structure is formed on one of the two machine parts. A rotary seal has a foot section and a sealing lip connected via a connecting section. The foot section is arranged on or in the seal holding structure. The sealing lip rests sealingly on a sealing surface of the respective other machine part to seal an oil side from an outside of the rotary seal arrangement. On the oil side there is a foam ring with a base body and with a holding section which surrounds the first machine part and which is held on the foot section of the rotary seal via the holding section.

Abstract: A method of manufacturing a high-pressure composite pressure vessel for high-pressure being at or above 70 bar (1000 PSI or 7 MPa) includes providing an expandable core vessel defining a hoop section between end domes. An aligned discontinuous fiber composite material is wrapped over the expandable core vessel aligning with a plurality of load paths present in the expandable core vessel being over the hoop section and end domes. The aligned discontinuous fiber composite material has fibers in a prepreg tape that are at least 5 mm in length to 100 mm in length or less. Next, a continuous fiber-reinforced composite is wrapped over the aligned discontinuous fiber-reinforced composite along the hoop section and not wrapped along the end domes. The expandable core vessel may be pressurized and heated to consolidate the composite overwrap. Finally, the vessel is cooled under pressure resulting in the high-pressure composite pressure vessel.

Abstract: A method of manufacturing a stator sleeve starts with wrapping a cylindrical mandrel with a heated prepreg tape using automated fiber placement. The prepreg tape has a continuous fiber reinforcement within a polymer matrix. Next, cool and remove the cylindrical mandrel from the wrapped prepreg tape resulting in an unfinished cylindrically shaped stator sleeve. Each end of the unfinished stator sleeve is trimmed. Next, abut a first and a second end ring respectively against a first and a second ends of the trimmed stator sleeve using a cylindrical fixture tool. The first and second end rings are the same material as the polymer matrix of the prepreg tape. Finally, laser welding or melt bonding the first and second rings to the first and second ends of the trimmed stator sleeve.

Abstract: A rib-stiffened composite structure includes a composite face sheet having a continuous reinforcing fiber in a polymer matrix. A polymer core is in a grid pattern disposed on the composite face sheet, the grid pattern having a first series of paths crossing over a second series of paths. Material voids are formed in the spaces between the series of paths. A composite rib-cap is disposed upon an upper surface of the polymer core. The composite rib-cap includes a continuous reinforcing fiber in a polymer matrix. The fibers of the continuous reinforcing fiber of the polymer matrix of the composite rib cap are oriented in a direction along the first and second series of paths of the grid pattern of the extruded polymer core.

Abstract: Disclosed is a novel 3D-printer system for printing elastically deformable rubber parts such as rubber seals where the uncured rubber source material is partially cured before printing each rubber layer of the rubber part. Furthermore, disclosed is a novel 3D printing method for 3D-printing an elastically deformable rubber body using the 3D-printer system.

Abstract: A seal arrangement includes a first and a second machine part which are arranged spaced apart from one another with the formation of a sealing gap and can be moved relative to one another about a movement axis. A seal element with a base section is arranged on or in a seal holding structure of one of the two machine parts. A sealing head bears in a dynamically sealing manner by way of a sealing section against a sealing surface of the respective other machine part in order to seal a high-pressure side from a low-pressure side. The seal element on the high-pressure side has at least one flow element, wherein during relative movement of the two machine parts fluid on the high-pressure side in the area of the sealing section of flows onto the sealing head.

Abstract: A rotary seal assembly has a first and second machine element spaced apart forming a sealing gap. The first machine element has a seal-holding structure and the second machine element a sealing surface. A rotary seal is held on the seal-holding structure of the first machine element which has a sealing lip, the front side of which faces the sealing surface and at least partially abuts the sealing surface of the second machine element, pretensioned in a dynamically sealing manner. The sealing lip has pockets on its rear side or on its end face facing the high pressure side. The sealing lip on its rear side, in the case of rearwardly arranged pockets, is tensioned against the sealing surface by an elastically deformable pretensioning ring, and is tensioned in the case of the front side pockets by an elastic resilience inherent in the material of the rotary seal.

Abstract: A sealing device has a sensor system for condition monitoring. The sealing device includes a sealing ring with a dynamic sealing section for dynamically sealing abutment at a sealing surface of a machine part and a pretensioning ring for pretensioning the sealing section against the sealing surface having a first section and a second section. The second section can be deflected in a spring-elastic manner in an axial or radial direction relative to the central axis of the sealing device from a first position relative to the first section. The sensor system includes at least one measuring element arranged in the intermediate space on the pretensioning ring, which responds indirectly or directly to a deflection movement of the first section of the pretensioning ring. A sealing arrangement may have such a sealing device.

Abstract: A composite armor includes a ceramic substrate defining a frontside opposite a backside, where a thickness is defined extending between the frontside and the backside. A first tension-wrapped thermoplastic composite overwind is wrapped around the ceramic substrate about the frontside and backside. A first portion of the first overwind overlaps a second portion of the first overwind. The first and second portions of the first overwind are fixedly attached to one another utilizing a first localized heating. The first overwind includes a first tensile pretension. A backing is disposed about the backside of the ceramic substrate attached to the first overwind. The ceramic substrate has a higher modulus of elasticity in comparison to the overwind. The first overwind has a higher modulus of elasticity in comparison to the backing.

Abstract: A wear ring for guidance of two machine components are arranged movably relative to one another along/around a movement axis, which is formed in one piece from a plastic or a reinforced plastic material and which is slit such that it has two free ends. The wear ring has a cross-sectional width W, which at least sectionally, increases in a radial direction towards the rear side of the wear ring. The wear ring has one or more recesses formed on its front side and/or on its the rear side for increasing its deformability and thus facilitate mounting thereof in a mounting groove of a machine element. Furthermore, a wear ring arrangement with a wear ring can be clipped into a mounting groove of one of the machine components of the wear ring arrangement.