Seal exit flow discourager

Details Seal exit flow discourager Seal exit flow discourager

1992-01-28

1993-06-15

Bertsch, Richard A.

Power plants

Combustion products used as motive fluid

Combustion products generator

277 53, 4151745, F02C 300

Patent

active

052188167

ABSTRACT:
A circumferential element discourages the flow of hot gases exiting from a labyrinth or other type of seal in a gas turbine engine. This seal exit flow discourager may be integrally incorporated in the honeycombed seal surface of a labyrinth seal or in the ring supporting the honeycombed seal surface. The seal exit flow discourager has a generally radial surface upon which impinges the jet of hot gases exiting from the labyrinth seal. This surface prevents the exiting hot gases from impinging directly on the low-pressure turbine shaft. At the same time low-temperature air from the compressor is flowing through an annular passageway located between the labyrinth seal and the low-pressure turbine shaft. The seal exit flow discourager diverts the hot gases exiting from the labyrinth seal into the stream of cooling air, thereby causing turbulent mixing of the hot gases and cool air.

REFERENCES:
patent: 3589475 (1971-06-01), Alford
patent: 4137705 (1979-02-01), Anderson
patent: 4190397 (1980-02-01), Schilling et al.
patent: 4320903 (1982-03-01), Ayache
patent: 4815272 (1989-03-01), Laurello

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