Magnetic fluid seal

Details Magnetic fluid seal Magnetic fluid seal

1985-01-14

1986-01-21

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 80, 277135, F16J 1542

Patent

active

045653798

ABSTRACT:
A magnetic fluid seal provided in a sealing gap defined between an inner surface of an outer rotor and the outer periphery of a disc-shaped magnet includes magnetic liquid situated in the sealing gap and the improvement wherein the inner surface of the outer rotor is inclined so that in a cross-section through a plane containing the axis of rotation of the rotor, the inner surface forms an angle with the axis of rotation of the rotor whereby retention of the magnetic liquid in the sealing gap is facilitated by the reaction forces to the centrifugal forces acting on the magnetic liquid during operation.

REFERENCES:
patent: 4200296 (1980-04-01), Holliston et al.
patent: 4304411 (1981-12-01), Wilcock
patent: 4335885 (1982-06-01), Heshmat
patent: 4526380 (1985-07-01), Raj et al.

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