Ferrofluid bearing and seal apparatus

Details Ferrofluid bearing and seal apparatus Ferrofluid bearing and seal apparatus

1986-02-26

1986-12-23

Levy, Stuart S.

Bearings

Rotary bearing

Plain bearing

277 80, 277135, 384424, 384446, F16C 3374, F16C 3382, F16J 1540

Patent

active

046309438

ABSTRACT:
A composite ferrofluid bearing and seal apparatus which comprises a ferrofluid seal apparatus which contains disposed therein a bearing element, to form a ferrofluid-film bearing with the surface of a shaft, the ferrofluid seal apparatus retaining the bearing ferrofluid film within the bearing cavity, by forming a ferrofluid O-ring seal, held by magnetic flux, at each end of the bearing element, the composite ferrofluid bearing and seal apparatus acting to contain the bearing ferrofluid film within the fluid-film bearing cavity and to exclude gases from being entrained in the ferrofluid.

REFERENCES:
patent: 3439961 (1969-04-01), Stiles
patent: 3891282 (1975-06-01), Tuffias
patent: 4054293 (1977-10-01), Hoeg et al.
patent: 4254961 (1981-03-01), Fersht et al.
patent: 4407508 (1983-10-01), Raj et al.

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