Fluid retention principle for hydrodynamic bearings

Details Fluid retention principle for hydrodynamic bearings Fluid retention principle for hydrodynamic bearings

1997-11-03

1999-11-30

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384123, 384130, 384381, F16C 1710

Patent

active

059930667

ABSTRACT:
A hydrodynamic bearing design is disclosed incorporating a flexible membrane at one end of the fluid gap in the hydrodynamic bearing. If voids exist in the fluid, and if changes in the size of these voids or bubbles occur with changes in temperature or pressure in which the disc drive is being used, then the volume of the fluid will change, and increase relative to the change in size of the volume of the surrounding physical part. The flexible membrane will yield to the increased pressure of the increasing volume of the fluid. The membrane essentially acts as a spring whose spring force is overcome by the pressure created by or accompanying a increase in volume in which the lubricating fluid is contained, and preventing its escape or being forced out of the inner region of the bearing.

REFERENCES:
patent: 4795275 (1989-01-01), Titcomb et al.
patent: 4883367 (1989-11-01), Maruyama
patent: 5018881 (1991-05-01), Asada
patent: 5141338 (1992-08-01), Asada et al.
patent: 5246294 (1993-09-01), Pan
patent: 5487608 (1996-01-01), Leuthold et al.

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