Bearings – Rotary bearing – Fluid bearing
Patent
1999-11-02
2000-10-03
Footland, Lenard A.
Bearings
Rotary bearing
Fluid bearing
384107, F16C 1710
Patent
active
061263206
ABSTRACT:
In a hydrodynamic pressure bearing according to the present invention, the lubricating fluid held in the radial bearing portion is pumped toward the thrust bearing portion by grooves formed in the radial bearing portion. And the hydrodynamic pressure bearing is provided with a circumferential groove formed in the vicinity of the boundary region between the radial and thrust bearing portions so as to control the flow of lubricating fluid between the bearing portions depending on the amount of lubricating fluid held therein. The circumferential groove is formed on the sleeve member near the inner opening of a communicating hole which in turn axially passes through the thrust plate and communicates the gap defined by the shaft and the sleeve member therebetween with the external atmosphere. While a predetermined amount of lubricating fluid is retained in the gap, some extra lubricating fluid is also retained in the vicinity of the inner opening of the communicating hole. As the lubricating fluid is reduced by evaporation or other factors, air enters the gap through the communicating hole by the effect of atmospheric pressure. The air is retained near the circumferential groove and separates the lubricating fluid into the radial bearing portion and the thrust bearing portion. As a result, the flow of the lubricating fluid is interrupted.
REFERENCES:
patent: 5141338 (1992-08-01), Asada et al.
patent: 5407281 (1995-04-01), Chen
patent: 5423612 (1995-06-01), Zang et al.
patent: 5433529 (1995-07-01), Hensel
patent: 5487608 (1996-01-01), Leuthold et al.
patent: 5524986 (1996-06-01), Leuthold et al.
patent: 5536088 (1996-07-01), Cheever et al.
patent: 5558445 (1996-09-01), Chen et al.
patent: 5658080 (1997-08-01), Ichiyama
patent: 5667309 (1997-09-01), Nose
patent: 5685647 (1997-11-01), Leuthold et al.
patent: 5718516 (1998-02-01), Cheever et al.
Footland Lenard A.
Nidec Corporation
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