Stepped tooth rotating labyrinth seal

Details Stepped tooth rotating labyrinth seal Stepped tooth rotating labyrinth seal

1990-02-21

1992-09-01

Shoap, Allan N.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

4151744, 4151745, F16J 15447, F01D 1102

Patent

active

051433834

ABSTRACT:
A rotating labyrinth seal especially useful for effecting sealing between two plenums in aircraft gas turbine engines comprising a base and a plurality of radially-directed seal teeth rings extending circumferentially around the outer peripheral surface of the base. Each of the seal teeth rings has a body portion and a tip portion, with the body portion being substantially thicker than the tip portion. Seal teeth rings of the invention exhibit improved resistance to fatigue crack propagation compared to conventional seal teeth rings.

REFERENCES:
patent: 899319 (1908-09-01), Parson et al.
patent: 3042365 (1962-07-01), Curtis et al.
patent: 3092393 (1963-06-01), Morley et al.
patent: 3514112 (1970-05-01), Pettengill
patent: 3733146 (1973-05-01), Smith et al.
patent: 4351532 (1982-09-01), Laverty
patent: 4386784 (1983-06-01), Banks
J. A. Harris et al., AFWAL-TR-80-4118--Concept Definition: Retirement for Cause of F100 Rotor Components--Sep. 1980.

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