Fluid bearing with asymmetrical groove pattern

Details Fluid bearing with asymmetrical groove pattern Fluid bearing with asymmetrical groove pattern

1994-04-12

1995-06-27

Footland, Lenard A.

Bearings

Rotary bearing

Fluid bearing

384113, 384115, 384123, 384130, 384292, F16C 3200

Patent

active

054274567

ABSTRACT:
An electric motor construction includes a rotor housing and sleeve which surrounds a shaft/thrust plate. The thrust plate is enclosed in a dead end cavity and is surrounded by a fluid which forms a fluid bearing. The shaft has asymmetrical grooves which create a net pressure gradient from a capillary seal formed near the bottom of the shaft toward the dead end cavity. This helps maintain the capillary seal and reduce the risk of cavitation.

REFERENCES:
patent: 5018880 (1991-05-01), Nakasugi et al.
patent: 5096309 (1992-03-01), Nakasugi et al.
patent: 5273368 (1993-12-01), Asada et al.
patent: 5322369 (1994-06-01), Kataoka et al.

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