Centrifugal capillary seal for use with fluid dynamic bearings

Details Centrifugal capillary seal for use with fluid dynamic bearings Centrifugal capillary seal for use with fluid dynamic bearings

1998-04-14

2000-11-28

Klimowicz, William

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 9807, 384110, G11B 1702, F16C 3374

Patent

active

06154339&

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 of the capillary seal uses centrifuigal force to actively push the oil back into the FDB while it is spinning, combined with the capillary tension which holds oil in the FDB during stationary periods. Also, the seal design comprises two walls which converge toward an apex near an adjacent fluid dynamic bearing. This design allows air, trapped within the seal and the associated FDB, to be expelled, eliminating air bubbles from the fluid dynamic bearing.

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