WORKING FLUID INJECTING DEVICE AND METHOD FOR FLUID DYNAMIC-PRESSURE BEARING, AND MANUFACTURING METHOD OF FLUID DYNAMIC-PRESSURE BEARING

摘要

PROBLEM TO BE SOLVED: To fill a minute clearance of a bearing unit with a working fluid in a simple process by neither mixing bubbles nor scattering splash of working fluid around. SOLUTION: The working fluid injecting device for a fluid dynamic-pressure bearing is mounted in a contact state on the upper surface 5a of the housing 5 in which a ring-shaped opened part 11 formed in an opening 10a of a housing 5 is upwardly provided, and equipped above the opened part 11 with: a cover member 35 forming a storage part 39 in which the working fluid 2 can be stored; a chamber 14 for sealably accommodating a bearing unit 6 on which the cover member 35 is mounted, a valve device for opening/closing the inside space of the chamber 14 with respect to the outside space; an exhaust device for creating a pressure-reduced condition by exhausting air in the inside space of the chamber 14; and a dispenser for dripping the working fluid 2 to the storage part 39 in the pressure-reduced chamber 14. COPYRIGHT: (C)2005,JPO&NCIPI