Technique for filling bearing clearance of...

Details Technique for filling bearing clearance of... Technique for filling bearing clearance of...

2008-03-18

2008-03-18

Chang, Rick K (Department: 3726)

Metal working

Method of mechanical manufacture

Process for making bearing or component thereof

C029S898000, C029S898020, C141S051000, C141S005000, C141S007000, C141S059000, C141S065000, C141S082000

Reexamination Certificate

active

07343682

ABSTRACT:
Fluid-dynamic-pressure bearing manufacturing method for more efficient and fail-safe degassing of bearing oil. Method makes it possible to prevent the generation of air bubbles in the course of an oil-charging operation that amounts to a step following degassing, and to single out the causative source of air bubbles when their generation has been detected. At the same time oil that is under a reduced-pressure environment within an oil-storing vacuum chamber is vacuum-degassed, immersed within the oil a stirrer for agitating and degassing the oil is rotated by indirect drive means, and the oil after having been degassed is supplied to a vacuum chamber where a fluid-dynamic-pressure bearing unit is retained—which has been pumped down to a pressure below the pressure within the oil-storing vacuum chamber—and is charged into the bearing clearances by raising the internal pressure of the bearing-retaining vacuum chamber.

REFERENCES:
patent: 3645508 (1972-02-01), Balteau
patent: 5601125 (1997-02-01), Parsoneault et al.
patent: 2002-005170 (2002-01-01), None
patent: 2002-213452 (2002-07-01), None

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