Provided is a bearing structure, including: a thrust bearing surface having a through hole for allowing a shaft to be inserted therethrough; a plurality of land portions, which are formed on the thrust bearing surface, and are separated apart from each other in a rotation direction of the shaft; a tapered portion, which is formed between the plurality of land portions on the thrust bearing surface, and has a projection height in an insertion direction of the shaft which becomes higher toward a forward side in the rotation direction; and a thrust groove, which is formed in the tapered portion, and extends from the through hole to a radially inner side of an outer peripheral end of the tapered portion.

A thrust washer according to an embodiment has an annular washer body having a first thrust surface and a second thrust surface that receive a thrust load, and a tapered portion formed on at least one of the first thrust surface and the second thrust surface, and the washer body has a waviness larger than a difference in height of the tapered portion in a direction perpendicular to the thrust surface.

A hydrodynamic bearing contains a body of which an inner surface forms a cavity arranged to accommodate and surround a rotary shaft. The cavity has a plurality of pads installed on the inner surface so as to support and guide the rotary shaft in rotation in a direction of rotation w from upstream to downstream. Each pad has an upper surface of which one portion, referred to as the active surface, acts as a sliding surface for the rotary shaft. The bearing having at least one pad included in an active angular sector of the bearing and at least one pad included in a passive angular sector of the bearing such that the active surface of each pad of the passive angular sector is lower than the active surface of each of the pads of the active angular sector.

The invention relates to an exhaust-gas-driven turbocharger having a hydrodynamic plain bearing having a rotor and a stator, the rotor being rotatable with respect to the stator, the rotor bearing surface being located opposite a counter-surface of the stator in order to generate hydrodynamic pressure in the region of a converging gap. In such a hydrodynamic plain bearing, the application properties can be improved by the fact that the rotor bearing surface and/or the counter-surface constitutes in a section view, in the context of a section along and through the rotation axis, a continuous bearing contour that is constituted from convex or concave curvatures and/or from at least two contour segments that are embodied as straight lines and/or curvatures. The invention also relates to a hydrodynamic plain bearing or bearing arrangement having such a plain bearing.

A slide surface of a thrust bearing includes a planar portion, a taper portion, and a pocket portion. The pocket portion includes a bottom surface, a first side surface, and a second side surface. The first side surface is formed on the side of the taper portion. The second side surface is formed on a side opposed to the first side surface. A depth from the plane of the planar portion to the thinnest portion of the taper portion is between 10 m and 80 m. A first angle that is an angle between a virtual surface obtained by extending the bottom surface and the second side surface is between 90 and 120. And a second angle that is an angle between a virtual surface obtained by extending the first side surface and the tapered surface is between 60 and 120.

A system includes a hydraulic energy transfer system configured to exchange pressures between a first fluid and a second fluid, wherein the first fluid has a pressure higher than the second fluid. The hydraulic transfer system includes a cylindrical rotor configured to rotate circumferentially about a rotational axis and having a first end face and a second end face disposed opposite each other, a first end cover having a first surface that interfaces with the first end face of the cylindrical rotor, and a hybrid hydrodynamic-hydrostatic bearing system configured to resist axial displacement of the cylindrical rotor.

The invention relates to a hydrodynamic bearing, namely a hydrodynamic disk-shaped thrust bearing or hydrodynamic thrust washer, wherein hydrodynamic structures having elevations and having depressions arranged between adjacent elevations are arranged on opposite sides of the bearing, which hydrodynamic structures extend in the peripheral direction, and slopes of the hydrodynamic structures are arranged between adjacent depressions, which slopes extend from the depressions toward the elevations. According to the invention, at least some of the elevations of the hydrodynamic structures of the first side of the bearing are arranged in the region between two depressions of the hydrodynamic structures of the second side of the bearing, the elevations of a side of the bearing being arranged at an offset to each other in the peripheral direction. The hydrodynamic bearing can be easily adapted to expected axial loads of the bearing and enables low-loss and low-wear axial support.

A bearing assembly is for movably coupling first and second members, one being movable relative to the other. A plain bearing section includes an inner ring connectable with the first member and an outer convex bearing surface. An outer ring is disposed about the inner ring and has an inner concave bearing surface disposed against the inner ring bearing surface. The two bearing surfaces are formed such that one bearing surfaces slides against the other when the movable member displaces about a first axis and two bearing surfaces engage to prevent displacement between the two rings when the movable member displaces about a second axis. An elastomeric bearing section is disposed about the plain bearing section, is connected with the second member and formed such that at least a portion of the elastomeric bearing section flexes when the movable member angularly displaces about the second axis.

A motor is configured to drive a centrifugal compressor. The motor includes a stator, a rotor, and a shaft. The shaft is supported by a pressure dam bearing (230,240). The pressure dam bearing is lubricated with a lubricant. The lubricant creates a lubricant wedge within the pressure dam bearing that exert an upward force on the shaft. The upward force causes an amount of vibration within the motor. The pressure dam bearing includes a pressure dam (232,242) configured to hold a portion of the lubricant and exert a downward force on the shaft. The downward force balances the upward force and reduces the amount of vibration within the motor, thus achieving greater hydrodynamic stabilization.

An axial bearing may include a body having a disk-form configuration, a centrally disposed passage opening extending axially into the body structured to receive a shaft, and at least one circular segmental oil pocket opening towards the passage opening. The at least one oil pocket, in both circumferential directions relative to the body, may transition into a plateau surface section directly adjoining the at least one oil pocket.