Balance piston and seal for gas turbine engine

Details Balance piston and seal for gas turbine engine Balance piston and seal for gas turbine engine

1979-06-25

1981-12-22

Freeh, William L.

Rotary kinetic fluid motors or pumps

With diversely oriented inlet or additional inlet for...

417173, F03B 1100, F04D 2908

Patent

active

043068340

ABSTRACT:
The turbine section of a gas turbine engine includes structure in the disc cavity for separating high pressure air into cooling air for delivery to cooled blades and sealing air for preventing hot motive fluid from entering the cavity. A disc cavity seal is provided to minimize leakage of the sealing air into the motive gas path resulting in increased air pressure on the air separator structure (which is integrally attached to the rotor) and providing a balance piston for counteracting the normal thrust on the rotor and reducing the thrust bearing load. The resultant decrease in leakage of high pressure air also improves the engine performance efficiency.

REFERENCES:
patent: 2410769 (1946-11-01), Baumann
patent: 2647684 (1953-04-01), Lombard
patent: 2966296 (1960-12-01), Morley et al.
patent: 3602605 (1971-08-01), Lee
patent: 3814539 (1974-06-01), Klompay
patent: 3846899 (1974-11-01), Gross
patent: 3936216 (1976-02-01), Dixon

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