Asymmetric sealing means for fluid dynamic bearings

Details Asymmetric sealing means for fluid dynamic bearings Asymmetric sealing means for fluid dynamic bearings

1998-04-14

1999-11-09

Footland, Lenard A.

Bearings

Rotary bearing

Fluid bearing

384110, F16C 1710

Patent

active

059801131

ABSTRACT:
An improved capillary seal for use with a hydrodynamic bearing is disclosed, which provides a stronger or stiffer seal for a fluid dynamic bearing motor which is open at both ends, and is used with top cover attached motors utilizing fluid dynamic bearings. The design for the seal system actively pushes the oil back into the FDB while it is spinning, combined with the capillary tension which holds oil in the FDB during stationary periods, and allows air, trapped within the seal and the associated FDB, to be expelled, eliminating air bubbles from the fluid dynamic bearing.

REFERENCES:
patent: 5448120 (1995-09-01), Schaule et al.
patent: 5876124 (1999-03-01), Zang et al.

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