Magnetic fluid sealing device

Details Magnetic fluid sealing device Magnetic fluid sealing device

1983-09-13

1986-08-12

Frankfort, Charles

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277135, F16J 1540

Patent

active

046052330

ABSTRACT:
A magnetic fluid sealing device has a housing, a shaft accommodated in the housing, a plurality of permanent magnets disposed, in series, coaxially with each other, and polepieces disposed between the two adjoining magnets. The polepieces have one or more concave grooves to form a plurality of knife edges for concentrating magnetic flux. The density of magnetic flux passing through the edge or edges located adjacent to a vacuum environment is more increased than that through other edges.

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