Dynamic-pressure gas bearing

Details Dynamic-pressure gas bearing Dynamic-pressure gas bearing

1997-01-31

1998-05-05

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384120, F16C 3206

Patent

active

057465150

ABSTRACT:
A dynamic-pressure gas bearing wherein a rotational shaft is disposed to surround an outer circumference of a stationary shaft or to be surrounded by an inner circumference of a stationary shaft, and a dynamic pressure is generated between the stationary shaft and the rotational shaft through rotation of the rotational shaft, characterized in that a water relief portion is provided. In a dynamic-pressure gas-bearing having a water relief portion, even when the bearing is used in a high-humidity environment or even when water (water vapor) contained in a gas liquefies due to high pressure, a pressure change, or the like, the water relief portion prevents a water film from being formed to thereby prevent an increase in a shear force acting between the stationary shaft and the rotational shaft.

REFERENCES:
patent: 4808070 (1989-02-01), Fonda-Bonardi
patent: 5240332 (1993-08-01), Onishi et al.
patent: 5415476 (1995-05-01), Onishi

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