Motor with a hydro-dynamic bearing

Details Motor with a hydro-dynamic bearing Motor with a hydro-dynamic bearing

1995-12-01

1997-08-19

Hannon, Thomas R.

Bearings

Rotary bearing

Fluid bearing

384119, 384132, F16C 3206, F16C 3382

Patent

active

056580800

ABSTRACT:
A motor includes a shaft; a shaft retainer which retains the shaft and a thrust plate provided to the shaft, and thrust dynamic pressure fluid bearing means are provided between the thrust plate and the shaft retainer and radial dynamic pressure fluid bearing means are provided between the shaft retainer and the shaft. Between the outer circumferential surface of the thrust plate and the inner circumferential surface of the shaft retainer, a ring-shaped space is formed and oil is filled in a part of this ring-shaped space. Ring-shaped projections are provided on the outer circumferential surface of the thrust plate. When the motor is running at a high-speed, oil in the ring-shaped space is retained on the shaft retainer and through this oil, oil in the thrust dynamic pressure fluid bearings at the upper and lower surface sides are communicated with each other.

REFERENCES:
patent: 3778123 (1973-12-01), Hendler et al.
patent: 4445793 (1984-05-01), Shinohara
patent: 4892418 (1990-01-01), Asada et al.
patent: 5112142 (1992-05-01), Titcomb et al.
patent: 5246294 (1993-09-01), Pan
patent: 5427456 (1995-06-01), Hansel
patent: 5433529 (1995-07-01), Hensel

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