Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2006-11-03
2009-02-10
Lam, Thanh (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S06700R
Reexamination Certificate
active
07489059
ABSTRACT:
A motor is composed of a rotor and a stator. The rotor includes a shaft, a hub having a cylindrical wall and a thrust ring. The stator includes a motor base, an inner seal and a sleeve having a flange section. The rotor is supported in a thrust direction by a first thrust dynamic pressure fluid bearing constituted by a top surface of the thrust ring, a surface of the flange section with having a first gap between them, and lubrication fluid filled in the first gap and a second thrust dynamic pressure fluid bearing constituted by a bottom surface of the thrust ring, an end surface of the inner seal with having a second gap between them, and the lubrication fluid filled in the second gap, and supported in a radial direction by a radial dynamic pressure fluid bearing constituted by an inner circumferential surface of the sleeve, an outer circumferential surface of the shaft with having a third gap between them, and the lubrication fluid filled in the third gap. The motor is further composed of a taper seal section constituted by an inner circumferential surface of the cylindrical wall and an outer circumferential surface of the inner seal, a main lubrication route linking the taper seal section, the second gap, the first gap and the third gap, and a bypass route linking the third gap and an intermediate point between the second and first gaps, wherein both routes are filled with the lubrication fluid.
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Connolly Bove & Lodge & Hutz LLP
Lam Thanh
Victor Company of Japan , Limited
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