Face type shaft seal for liquid metal pumps

Details Face type shaft seal for liquid metal pumps Face type shaft seal for liquid metal pumps

1979-08-14

1981-06-30

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 962, 277134, 277135, F16J 1534, F16J 1540

Patent

active

042758912

ABSTRACT:
A face type shaft seal for liquid metal pumps comprises a non-contacting seal in which at least one seal face has spiral grooves therein. The seal faces are gold plated and designed so that the liquid metal wets the seal faces and creates a thin layer of liquid metal between the two seal faces during both rotation of the pump shaft and non-rotation of the pump shaft. The thin layer of liquid metal prevents contact of the two seal faces during initial rotation of the pump shaft.

REFERENCES:
patent: 2949321 (1960-08-01), Tracy
patent: 3502342 (1970-03-01), Albert
patent: 3638957 (1972-02-01), Marsi
patent: 3675935 (1972-07-01), Ludwig et al.
patent: 3894741 (1975-07-01), McHugh
patent: 3973781 (1976-08-01), Grorich
patent: 4007940 (1977-02-01), Chapa
"Metal V-Seals Mark II", Parker Seal Company, Culver City, Calif., Booklet issued Mar. 1969, Booklet No. V5870, p. 5.

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