Mechanical face seal for sealing slurry liquid

Details Mechanical face seal for sealing slurry liquid Mechanical face seal for sealing slurry liquid

1984-07-06

1985-10-08

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 82, 277 87, 277134, 277135, F16J 1538

Patent

active

045455880

ABSTRACT:
A mechanical seal for sealing a slurry liquid between a casing and a rotary shaft comprises a fixed seat ring; a rotatable slide ring in the casing and abutting against the seat ring to form a sealing face therebetween; a helical spring in the casing and surrounding the rotary shaft, and biassing the rotatable slide ring toward the seat ring; and a rotatable ring on the rotary shaft and rotatable with the rotary shaft and holding the spring at a predetermined position relative to the rotary shaft, the spring being interposed between the rotatable slide ring and the rotatable ring. A small space is provided between the casing and the rotatable ring and the rotatable ring has a helical projection on the outer surface thereof. The helical projection of the rotatable ring and the helical spring are directed such that upon rotation thereof a force is produced in a direction away from the sealing face and toward the interior of the casing. The spring is preferably a helical screw-thread-like member of rectangular cross-section.

REFERENCES:
patent: 1997613 (1935-04-01), Vroom
patent: 2096329 (1937-10-01), Kagi
patent: 2201478 (1940-05-01), Czarnecki et al.
patent: 2297477 (1942-09-01), Huhn et al.
patent: 2354478 (1944-07-01), Reinhardt et al.
patent: 3578803 (1971-05-01), Huhn
patent: 3746350 (1973-07-01), Mayer et al.
patent: 3765689 (1973-10-01), Adams
patent: 4084825 (1978-04-01), Ludwig
patent: 4243230 (1981-01-01), Baker et al.

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