Motor having dynamic pressure bearing device

Details Motor having dynamic pressure bearing device Motor having dynamic pressure bearing device

1996-03-25

1998-08-04

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 384107, 384133, H02K 708, F16C 3382

Patent

active

057898367

ABSTRACT:
A motor having a dynamic pressure bearing device equipped with a rotor having a driving coil or a driving magnet, and a stator having the other of the driving coil or the driving magnet, the dynamic pressure bearing device comprising a shaft fixed to the rotor or the stator and having a dynamic pressure surface on its outer surface, a bearing body fixed to the other of the rotor or stator and having a dynamic pressure surface on its inner surface which is positioned to circumferentially confront the outer surface of the shaft body, a dynamic pressure generating groove formed on at least one side of both the dynamic pressure surfaces, and a lubricating fluid in which magnetic particles are dispersed in a base oil solvent containing an amine anti-gelling agent interposed between both of the dynamic pressure surfaces.

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