Non-contacting gas seal for relatively rotating parts

Details Non-contacting gas seal for relatively rotating parts Non-contacting gas seal for relatively rotating parts

1982-01-20

1984-01-17

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 961, 277199, F16J 1534

Patent

active

044260873

ABSTRACT:
In a non-contacting gas seal for a gas turbine engine a seal ring (12) (FIG. 3) is formed from a ring of overlapping segments (16) mounted in a housing (14) on a static component (9) of the engine, and co-operating to define a sealing face (15) which confronts a sealing face (10) on a rotating component (8) to form a seal. The segments overlap and are spaced at their leading ends from the rotating component to define a tapering gap (19) therebetween so that they lift away from the rotating component in operation to ride on a gas film leaving only a very small clearance.
In order to ensure that the relative circumferential dispositions of the segments does not alter significantly due to eccentric movements of the rotating component in operation, a dogged ring (34) is provided which is located in the housing by an anti-rotation dog (38) and has spaced dogs (36) engaging each of the segments to prevent circumferential movement thereof while allowing limited radial movement.

REFERENCES:
patent: 2402032 (1946-06-01), Flinn
patent: 2828983 (1958-04-01), Hunt
patent: 2921806 (1960-01-01), Carter
patent: 3305241 (1967-02-01), Hart
patent: 3606349 (1971-09-01), Petrie et al.
patent: 4082296 (1978-04-01), Stein
patent: 4114900 (1978-09-01), Wiese

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