Shaft seal for gas-filled machines

Details Shaft seal for gas-filled machines Shaft seal for gas-filled machines

1988-03-23

1989-03-28

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 15, 277 27, F16J 1540, F16J 1548

Patent

active

048157481

ABSTRACT:
In a shaft seal for hydrogen-cooled, turbo-generators, the operating requirements for a minimum gas-side leakage flow without secondary liquid circuit and cooling of the entire axial ring length are fulfilled either with choke elements (8) or with an inner transfer of sealing liquid from the gas side (G) to the air side (L) so that this shaft seal can function with a single sealing liquid circuit as a so-called single-circuit seal in parameter areas which are at present still the preserve of a multi-circuit seal.

REFERENCES:
patent: 3119623 (1964-01-01), Schevchenko
patent: 4486024 (1984-12-01), Cooper
patent: 4502693 (1985-03-01), Lesiecki et al.
patent: 4534569 (1985-08-01), Ishitani et al.
patent: 4579349 (1986-04-01), Pipich
BBC, Brown Boveri, Publication No. CH-T 070 022E, 3 pages, supplied by applicant, no date given.

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