Linear actuator for a bleed valve

Details Linear actuator for a bleed valve Linear actuator for a bleed valve

1992-01-31

1993-06-08

Casaregola, Louis J.

Power plants

Combustion products used as motive fluid

Combined with regulation of power output feature

415 27, F02C 918

Patent

active

052168778

ABSTRACT:
In a control system for a turbine engine having a variable geometry air compressor, a valve arrangement responsive to a first operational pressure differential created between a discharge fluid pressure produced by the air compressor and an environmental fluid pressure for controlling the communication of a first fluid pressure to an actuator assembly which responds to a second operational pressure differential created across a piston between the first fluid pressure and a second fluid pressure produced through a modification of the discharge fluid pressure. The second fluid pressure being developed by compressor discharge fluid pressure flowing from a blind bore in a shaft through a variable opening to one side if the piston while at the same time fluid pressure flows through a restriction to the surrounding environment. The resulting second pressure differential acts on the piston to provide the shaft with a force which is communicated through linkage to linearly change the shape of a variable area geometry device of the air compressor.

REFERENCES:
patent: 3172259 (1965-03-01), North
patent: 3646753 (1972-03-01), Colman et al.
patent: 3849021 (1974-11-01), Eastman et al.
patent: 3917430 (1975-11-01), Bloom et al.
patent: 3994617 (1976-11-01), McCombs
patent: 4251985 (1981-02-01), Sullivan

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