Self regulating bleed valve

Details Self regulating bleed valve Self regulating bleed valve

1995-08-24

1996-07-02

Look, Edward K.

Rotary kinetic fluid motors or pumps

Working fluid bypass

Selectively adjustable vane or working fluid control for bypass

415144, 415146, 415147, 60 3907, F01D 1700

Patent

active

055315666

ABSTRACT:
A self regulating bleed valve for a gas turbine engine is provided which taps or bleeds a portion of a gas, typically air, from a duct of the gas turbine having a wall bounding the gas flow. The bleed valve has a valve member pivotally attached to the wall such that the valve member extends through a main opening formed in the wall. The valve member has an internal cavity in communication with a gas inlet opening and a gas exhaust opening and is pivotally movable between an extended position wherein the gas inlet opening portion of the valve member extends into the gas flow duct such that the inlet opening faces generally in an upstream direction so as to deflect a portion of gas flow into the internal cavity, and a retracted position wherein the inlet opening extends obliquely, generally parallel, to the gas flow so as to minimize the air tapped or bled from the gas flow. The bleed valve also includes a control device fixedly attached to the valve member which is acted on by the flow of gas to cause the valve member to pivot between its extended and retracted positions, depending upon the speed and pressure of the gas flow. Thus, the self-regulating bleed valve taps or bleeds a generally constant amount of air regardless of the speed or pressure of the gas flow with which the valve is associated.

REFERENCES:
patent: 2546432 (1951-03-01), Darling
patent: 3487767 (1970-01-01), Kristiansen
patent: 3909152 (1975-09-01), Rannenberg
patent: 3915587 (1975-10-01), Rannenberg
patent: 5279109 (1994-01-01), Liu et al.

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