The present disclosure relates to a mechanical assembly of two mechanical parts rotatable relative to each other and enabling a self-centering fluid bearing to be obtained; it comprises a first part provided with a cylindrical cavity, a second part (34) having at least one cylindrical portion engaged in the cylindrical cavity of the first part, a gap separating the cylindrical portion and the wall of the cylindrical cavity so as to allow relative movement in rotation between the first part and the second part (34), and a lubricant distribution network (37, 38) configured for feeding said gap with a fluid lubricant so as to form a fluid bearing; a first surface (34s) selected from the inside surface of the cylindrical cavity of the first part and the outside surface of the cylindrical portion of the second part is provided with at least two lubricant admission orifices (39a, 39b) that are spaced apart from each other by not less than 120° about the main axis (F) of the first surface (34s), and the first surface (34s) also presents at least one circumferential groove (40a) extending circumferentially from the vicinity of a first lubricant admission orifice (39a) over at least 100° and in the direction of rotation of the second of said surfaces relative to the first surface (34s).

A device includes a bearing-in-bearing with an inner ring, an intermediate ring and an outer ring. Between the inner ring and the intermediate ring and between the intermediate ring and the outer ring, inner roller elements, and outer roller elements, are attached, respectively. The bearing-in-bearing is attached between two components that can rotate in relation to each other, a shaft and a housing, of which one component is or can be connected to a drive. A transmission is provided between the intermediate ring and the driven component in order to drive the intermediate ring. The transmission is a contactless transmission.

A torque transmission comprising input and output shaft adapters. Pins disposed on an outer surface of the input shaft adapter. Each pin provides a curved pin portion oriented generally perpendicular to the input shaft adapter's longitudinal axis. The output shaft adapter provides a recess with a plurality of receptacles (or notches) formed in the recess's periphery, wherein the recess is shaped and sized such that when the input shaft adapter is received inside the recess, each pin is received into a corresponding notch. The torque transmission further comprises torsional bearings interposed between the pins and the notches, each torsional bearing providing a curved laminate portion such that the curved laminate portions contact the curved pin portions when the pins are received into their corresponding notches. The torsional bearings may further provide flat laminate portions that contact the notch when the pins are received into the notches.

A torque transmission comprising input and output shaft adapters. Pins disposed on an outer surface of the input shaft adapter. Each pin provides a curved pin portion oriented generally perpendicular to the input shaft adapter's longitudinal axis. The output shaft adapter provides a recess with a plurality of receptacles (or notches) formed in the recess's periphery, wherein the recess is shaped and sized such that when the input shaft adapter is received inside the recess, each pin is received into a corresponding notch. The torque transmission further comprises torsional bearings interposed between the pins and the notches, each torsional bearing providing a curved laminate portion such that the curved laminate portions contact the curved pin portions when the pins are received into their corresponding notches. The torsional bearings may further provide flat laminate portions that contact the notch when the pins are received into the notches.

A device includes a bearing-in-bearing with an inner ring, an intermediate ring and an outer ring. Between the inner ring and the intermediate ring and between the intermediate ring and the outer ring, inner roller elements, and outer roller elements, are attached, respectively. The bearing-in-bearing is attached between two components that can rotate in relation to each other, a shaft and a housing, of which one component is or can be connected to a drive. A transmission is provided between the intermediate ring and the driven component in order to drive the intermediate ring. The transmission is a contactless transmission.

A camshaft may comprise a main shaft, on which at least two sliding cam pieces are accommodated in a rotationally fixed and axially displaceable manner, wherein the sliding cam pieces each comprise a carrier tube, on which are seated cam groups each comprising at least two cam tracks for valve-control purposes, as well as an adjustment element that can be brought into operative connection with an actuator for axial displacement of the two sliding cam pieces. A method for assembling such a camshaft may involve providing a module body with bearing bridges that receive the camshaft in a rotatable manner, inserting a first sliding cam piece into a first bearing bridge, connecting the first sliding cam piece to the adjustment element, inserting a second sliding cam piece into a second bearing bridge, and connecting the second sliding cam piece to the adjustment element with the aid of an axial adjustment distance of at least one of the sliding cam pieces in the bearing bridges.

A camshaft may comprise a main shaft, on which at least two sliding cam pieces are accommodated in a rotationally fixed and axially displaceable manner, wherein the sliding cam pieces each comprise a carrier tube, on which are seated cam groups each comprising at least two cam tracks for valve-control purposes, as well as an adjustment element that can be brought into operative connection with an actuator for axial displacement of the two sliding cam pieces. A method for assembling such a camshaft may involve providing a module body with bearing bridges that receive the camshaft in a rotatable manner, inserting a first sliding cam piece into a first bearing bridge, connecting the first sliding cam piece to the adjustment element, inserting a second sliding cam piece into a second bearing bridge, and connecting the second sliding cam piece to the adjustment element with the aid of an axial adjustment distance of at least one of the sliding cam pieces in the bearing bridges.

A porous ultrasonic bearing includes a ring, a high-strength outer casing, a bearing bushing and a vibration collar. The high-strength outer casing is sheathed on the bearing bushing, and a group of radial holes that penetrate are provided on the bearing bushing. The vibration collar is arranged between the high-strength outer casing and the bearing bushing. The outer cylindrical surface of the vibration collar is fixedly connected to the inner hole of the high-strength outer casing. A gap is provided between the inner hole of the vibration collar and the outer cylindrical surface of the bearing bushing. The vibration collar radially vibrates at high frequency. A high-strength lubricating oil film is formed between the inner hole of the bearing bushing and the shaft, so that the friction between the inner hole of the bearing bushing and the shaft is reduced.

A fuel flow control assembly for an aircraft engine. The assembly includes a gear arrangement having a shaft. Also included is a bearing structure operatively coupled to each shaft. Further included is a pressure pad disposed adjacent the bearing structure, the pressure pad having a radially extending port for receiving a fuel flow. Yet further included is a flow metering device in flow communication with the port of the pressure pad to restrict the fuel flow at a low pressure operating condition and open the port to increase the fuel flow at a high pressure operating condition.

A drive for a belt conveyor system includes a permanently excited synchronous motor having a stator and a rotor, wherein a gap size is formed between the rotor and the stator, and a holding device is provided, which is secured to the stator via a first securing device and to the rotor via a second securing device in order to provide secure assembly of the drive, such that the gap size is maintained, where the first securing device and/or the second securing device are detachably formed, such that an uninterrupted operation of the belt conveyor system is guaranteed.