Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1990-03-16
1991-05-07
Stephan, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 90, 360 980T, 384100, 384309, H02K 2122, G11B 5012
Patent
active
050139479
ABSTRACT:
A disk drive motor having a low profile construction and a gas-lubricated deflecting pad support usable in the disk drive motor and elsewhere includes a cup-shaped rotor having an integral cylindrical portion extending from the base of the cup; the cylindrical extension may be a shaft or a large hollow extension which encloses the stator windings. The stator can be conventional or can have a closed end and/or a cup-like portion to simplify construction and eliminate the need for a seal. A support mounted on the stator or the rotor supports the rotor for rotation relative to the stator. The support can be a deflecting pad support such as a deflecting pad hydrodynamic bearing or the plane or gas-lubricated deflecting pad support disclosed herein.
The gas-lubricated deflecting pad support member includes bearing pads and a support structure which supports the bearings for strictly radial movement. A contoured surface is formed on the pad surfaces or a support surface opposing the pad surfaces or both. Relative rotation between the pad surfaces and the support surface results in the development of a pressurized gas film between the support surface and the pad surface.
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"Gas-Lubricated Bearings", E. Bisson et al., Bearing Technology, pp. 119-124, 1965.
Rebsch D. L.
Stephan Steven L.
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