HYDRODYNAMIC BEARING, HYDRODYNAMIC BEARING DEVICE, AND MOTOR

WIPO Patent Application WO/2024/057868

A1

A hydrodynamic bearing (bearing sleeve 8) is equipped with a sintered body in which dynamic pressure-generating parts A1, A2 are die-formed on the inner-circumferential surface thereof. The dynamic pressure-generating parts A1, A2 have a plurality of dynamic pressure grooves G1 which extend in a direction which is angled relative to the circumferential direction, and a plurality of inclined hill sections G3 which are provided between the plurality of dynamic pressure grooves G1 in the circumferential direction. The circumferential direction width h[mm] of each inclined hill section G3 and the dynamic pressure groove G1 depth Hf[μm] adjacent to said hill section G3 on one side thereof in the circumferential direction satisfy 0.1