A sliding surface of a second sliding component is provided with a plurality of second positive pressure generation grooves communicating with a leakage side space, extending in a relative rotation direction of the second sliding component, and having closed terminating end portions, a sliding surface of a first sliding component is provided with a plurality of first positive pressure generation grooves communicating with the leakage side space, extending in a relative rotation direction of the second sliding component, and having closed terminating end portions, and the sliding surface and the sliding surface slide on each other at least in such a manner that the first positive pressure generation grooves and the second positive pressure generation grooves overlap and intersect with each other.

A thrust washer is provided with a ring-shaped portion that surrounds an insertion hole, the thrust washer is provided with a sliding surface and an oil groove configured to allow lubricating oil to flow in, the oil groove is provided with an opening portion configured to allow the lubricating oil to flow in from the insertion hole side in an inner peripheral end side, an outer periphery end side of the ring-shaped portion of at least one of the oil groove is provided with an oil stop wall which is configured to suppress flow of the lubricating oil toward an outer periphery side of the ring-shaped portion, and a sliding area ratio of each of the sliding surfaces to a projection plane in plan view of the ring-shaped portion is provided within a range of from 60% to 85%

A drive assembly for a torque converter is provided. The drive assembly includes a turbine; a damper assembly fixed to a first side of the turbine by connectors; and a hydrodynamic bearing fixed to a second side of the turbine opposite the first side. The hydrodynamic bearing includes at least one recess formed therein receiving ends of the connectors. A method of forming a drive assembly is also provided. The method includes fixing a damper assembly cover plate to a first side of a turbine via connectors; and fixing a hydrodynamic bearing to a second side of the turbine opposite the first side. The hydrodynamic bearing including at least one recess formed therein receiving an ends the connectors. A torque converter is also provided.

A thrust washer may include a metallic substrate layer having an axial substrate face. The thrust washer may also include a polymer layer on the axial substrate face. The polymer layer may have an axial polymer face opposed to the axial substrate face. The axial polymer face may be profiled and may have at least one oil distribution groove. At least one of the substrate layer and the polymer layer may be a machined layer having a thickness that may vary in correspondence with the at least one distribution groove.

A thrust sliding bearing reduces the number of components to thereby reduce the burden of assembly and components management and prevents unusual wear of a surface of an annular synthetic resin-made sliding bearing piece, which faces an annular metal plate. A thrust sliding bearing comprises an upper case which is integrally formed at least by an annular upper case base having an annular bottom surface and by an upper case cylindrical portion which is provided vertically from the annular bottom surface of the upper case base to be fitted in a lower case, wherein a synthetic resin-made sliding bearing piece is fixed to the inner side of the upper case cylindrical portion.

A bearing structure for an X-ray tube is provided that includes a journal bearing shaft with a radially protruding thrust bearing encased within a bearing sleeve, one of which rotates relative to the other. The stationary component, e.g., the journal bearing and/or the thrust bearing includes at least one vent groove formed therein that improves the ability of the journal bearing structure to enable gases trapped by the liquid metal within the bearing assembly to escape through the vent groove to the exterior of the X-ray tube. By adding a strategically located channel or vent groove of sufficient size in at least one of the journal bearing or the thrust bearing, the pressures resisted by the seal created between the liquid metal and the vent groove(s) in the bearing components is significantly reduced, allowing escape of the gases to avoid detrimental effects to the operation of the X-ray tube, while maintaining the load carrying capacity of the bearing assembly.

A pair of sliding members sliding relative to each other at sliding faces (S) is configured such that at least one of the sliding faces (S) includes a negative pressure generation mechanism (21) separated from a leakage side by a leakage-side land portion (R2) and a land portion (26) arranged in the negative pressure generation mechanism (21). In the compact sliding members, sliding torque can be reduced and a sealing function can be maintained.

A thrust washer is provided with a ring-shaped portion that surrounds an insertion hole, the thrust washer is provided with a sliding surface and an oil groove configured to allow lubricating oil to flow in, the oil groove is provided with an opening portion configured to allow the lubricating oil to flow in from the insertion hole side in an inner peripheral end side, an outer periphery end side of the ring-shaped portion of at least one of the oil groove is provided with an oil stop wall which is configured to suppress flow of the lubricating oil toward an outer periphery side of the ring-shaped portion, and a sliding area ratio of each of the sliding surfaces to a projection plane in plan view of the ring-shaped portion is provided within a range of from 60% to 85%

A suspension thrust bearing device for use with a suspension spring in an automotive suspension strut of a vehicle. The device includes a bearing having upper and lower annular bearing members in relative rotation, the lower annular bearing member, and a damping element. An axial stiffening insert in a hub of lower annular bearing member provides a lower end curved towards the interior of the device. Lower annular bearing member has at least one slender groove opening radially outwards and having a bottom end opening axially downwards, the damping element providing a portion fitted within the slender groove.

A washer assembly and a hydrodynamic torque converter comprising the washer assembly is provided. The washer assembly comprises a washer and a plate; the washer is annular and comprises a washer body and two or more positioning clamps protruding radially inward from an inner periphery of the washer body, at least one side of the positioning clamp in a circumferential direction having a positioning protrusion protruding; the plate is annular, an inner periphery portion of the plate being provided with two or more positioning notches; an edge of at least one side of the positioning notch in the circumferential direction being provided with a positioning groove; and the washer is mounted to one end face of the plate. The washer assembly saves the internal space of the torque converter and saves the material cost of the washer.