US 2003/0111627 A1 · Bleed valve system for a gas turbine engine

Abstract

A bleed valve assembly includes a valve poppet having a bleed portion and a base portion separated by a radially extending flange. The radially extending flange is located about the perimeter of the valve poppet to engage the valve seat on one side and receive a biasing member on the other. The flange engages the valve seat such that initial valve performance is similar to a disk valve, i.e., soft seating and very low leakage when closed. A plurality of openings extend through the bleed portion such that partial open operation of the bleed valve assembly is particularly tailored for a desired flow. As the valve poppet of the present invention moves off the valve seat, the initial gain is very low and then the gain increases steadily as more openings are exposed.

Claims19

Dependent claims

A bleed air valve assembly for a gas turbine engine comprising:

a valve body having a valve seat;
and
a valve poppet selectively movable along an axis relative to said valve seat to selectively expose a plurality of openings through said valve poppet.

Dependencies are inferred from the claim text.

Facts

Application

10/025,227Filed 19 Dec 2001

Published

19 Jun 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

F01D 17/145
By means of shiftable members or valves obturating part of the flow path: by means of valves, e.g. for steam turbines
F01D 17/105
Final actuators: by passing part of the fluid
F04D 27/0215
By bleeding, bypassing or recycling fluids: arrangements therefor, e.g. bleed or by-pass valves
F04D 27/023
By bleeding, bypassing or recycling fluids: details or means for fluid extraction

Bleed valve system for a gas turbine engine

Life of this patent

Bleed valve system for a gas turbine engine

Life of this patent

Abstract

Claims19