Compressor bleed valve

Details Compressor bleed valve Compressor bleed valve

1998-02-13

2000-09-26

Freay, Charles G.

Power plants

Combustion products used as motive fluid

60 3929, F02C 918

Patent

active

061229059

ABSTRACT:
A bleed valve is in fluid communication with the compressor fluid flow path and the bypass fluid flow path whereby a piston extends radially of the valve and includes a piston head radially remote from the compressor fluid flow path. A pneumatic chamber surrounds a portion of the piston head, and air from a source downstream of the impeller is introduced into the chamber. The piston including a valving member and a rigid sleeve connecting the piston head to the valving means opens or closes the communication between the compressor flow path and the bypass flow path. A precompressed spring is associated with the piston to normally urge the piston radially outwardly relative to the compressor fluid flow path to a valve open position, and when the pneumatic pressure in the chamber surrounding the piston head overcomes the precompressed spring, the valve is closed.

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