Labyrinth seals

Details Labyrinth seals Labyrinth seals

1979-09-27

1982-03-23

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 53, 415110, 415174, 415176, 415178, 415180, F01D 508, F16J 1544

Patent

active

043209033

ABSTRACT:
A labyrinth seal mounted between a shaft and the casing of a gas turbine combustion chamber, wherein the support of an abradable sealing surface in the seal which operates in conjunction with rapidly rotating fins is cooled by an upstream airflow parallel to the envelope surface of the extremities of such fins and opening into an upstream space. The cooling air is taken in from the casing by means of a conduit which is connected with an overflow valve tied to the gas turbine load. The invention is applicable to aviation turbojets.

REFERENCES:
patent: 2891808 (1959-06-01), Richardson
patent: 3339933 (1967-09-01), Foster
patent: 3603599 (1971-09-01), Laird
patent: 3679217 (1972-07-01), Lesiecki
patent: 3756020 (1973-09-01), Moskowitz et al.
patent: 3836156 (1974-09-01), Dunthorne
patent: 3989410 (1976-11-01), Ferrari
patent: 4190397 (1980-02-01), Schilling et al.
"Advanced Seal Technology", Technical Report AFAPL-TR-72-8, Feb. 1972, Air orce Aero Propulsion Laboratory, Air Force Systems Command, Wright-Patterson Air Force Base, Ohio 45433, front page and p. 59.

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