Pressurized face seal with initial run-in surface

Details Pressurized face seal with initial run-in surface Pressurized face seal with initial run-in surface

1980-10-02

1982-07-06

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 53, 277 83, 277 961, 277173, F16J 1538, F16J 1548

Patent

active

043379516

ABSTRACT:
In order to seal a rotating shaft in relation to a stationary housing portion or part a sealing bushing is arranged between both of these parts. The sealing bushing, while forming a sliding fit and being non-rotatable during operation, is arranged in a housing bore of the housing part and forms with a rotor portion or part arranged upon the shaft a contactless labyrinth seal. This sealing bushing bears in axial direction towards a side impinged with lower pressure, by means of a first sealing surface which tends to wear rather markedly during the running-in time of the sliding bushing, against a second sealing surface which is arranged at a rotor part rotatable relative thereto. To limit this wear and to obtain a sealing bushing which is free of play and contactless at the sealing region the sealing bushing is provided with a stop which, following the initial play, after expiration of the running-in time, bears against the stationary housing portion and thus limits the wear of the first sealing surface to a predetermined value.

REFERENCES:
patent: 2221225 (1940-11-01), Weis et al.
patent: 3093382 (1963-06-01), Macks
patent: 3529839 (1970-09-01), Greiner et al.
patent: 3606350 (1971-09-01), Gravelle
patent: 3685839 (1972-08-01), Frei
patent: 3823950 (1974-07-01), Pederson

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