ROTATING DEVICE

摘要

A rotating device includes a beam unit and a beam receiving unit. The beam unit includes a shaft part, a first flange part projecting in a ring shape from one end of the shaft part in a radial direction, and a second flange part projecting in a ring shape in the radial direction from another end of the shaft part. The beam receiving unit includes a sleeve part surrounding the shaft part in a state in which the sleeve part is rotatable, wherein a lubricant is provided in a region including a gap between the beam unit and the beam receiving unit. A radial dynamic pressure generating groove is provided between the beam unit and the sleeve part, and first and second thrust dynamic pressure generating grooves are provided between the first flange part and the sleeve part, and between the second flange part and the sleeve part, respectively.

主权项

1. A rotating device comprising:
a beam unit that includes a shaft part, a first flange part projecting in a ring shape from one end of the shaft part in a radial direction perpendicular to an axial direction, and a second flange part projecting in a ring shape in the radial direction from another end of the shaft part; a beam receiving unit that includes a sleeve part surrounding the shaft part in a state in which the sleeve part is rotatable relative to the shaft part, wherein a lubricant is provided in a region that includes a first gap between the beam unit and the beam receiving unit; a single radial dynamic pressure generating groove provided at one of mutually opposing surfaces of the shaft part and the sleeve part, opposing each other in the radial direction; a first thrust dynamic pressure generating groove provided at one of mutually opposing surfaces of the first flange part and the sleeve part, opposing each other in the axial direction; and a second thrust dynamic pressure generating groove provided at one of mutually opposing surfaces of the second flange part and the sleeve part, opposing each other in the axial direction, wherein the first thrust dynamic pressure generating groove and the second thrust dynamic pressure generating groove are separated from the shaft part along the radial direction.