Compact electric motor construction employing fluid bearings

Details Compact electric motor construction employing fluid bearings Compact electric motor construction employing fluid bearings

1995-06-13

1998-06-23

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 67R, 384100, 384107, 384112, 384121, 384123, 384132, F16C 1710, F16C 3372, H02K 708

Patent

active

057709068

ABSTRACT:
A compact electric motor construction employing fluid bearings for use in a disk drive apparatus includes a spindle having a shaft and a thrust plate and a hub assembly including a hub having an outer disk support portion with an inner thrust bearing surface located axially above the upper thrust bearing surface of the thrust plate. The hub also includes an inner sleeve which substantially surrounds the shaft and provides an air gap between its inner diameter and the outer diameter of the thrust plate. The air gap is vented to the interior of the motor cavity by vent passages. Transition grooves are provided on bearing surfaces adjacent all fluid seal zones for controlling the migration of bearing fluid in a radial direction and for providing a low fluid pressure region adjacent capillary seals at the ends of the shaft to contain the seal and prevent leakage.

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