Bleed valve with neutral or closing bias
AssigneeUnited Technologies Corporation
InventorJonathan Little
Life of this patent
Estimating the term…
Abstract
A compressor assembly may include a compressor case disposed about an axis. A bleed valve may be disposed about the compressor case to translate axially and/or rotationally relative to the compressor case. A first seal may be disposed in a forward seal housing of the bleed valve a first radial distance from the axis. A first sealing wall may be fixed relative to the compressor case and configured to engage the first seal. A second seal may be disposed in an aft seal housing of the bleed valve at a second radial distance from the axis. The first radial distance may be substantially equal to the second radial distance. A second sealing wall may be fixed relative to the compressor case and configured to engage the second seal.
Claims19
A bleed valve assembly, comprising:
- a bleed valve disposed about an axis and configured to translate relative to a compressor case;
- a first seal disposed in a forward seal housing of the bleed valve, wherein the first seal is disposed at a first radial distance from the axis;
- and
- a second seal disposed in an aft seal housing of the bleed valve, wherein the second seal is disposed at a second radial distance from the axis, wherein the first radial distance is substantially equal to the second radial distance and wherein the bleed valve is configured to have a neutral bias based on a pressure difference acting on the bleed valve.
A compressor assembly, comprising:
- a compressor case disposed about an axis;
- a bleed valve disposed about the compressor case and configured to translate at least one of axially or rotationally relative to the compressor case;
- a first seal disposed in a forward seal housing of the bleed valve, wherein the first seal is disposed at a first radial distance from the axis;
- a first sealing wall fixed relative to the compressor case and configured to engage the first seal;
- a second seal disposed in an aft seal housing of the bleed valve, wherein the second seal is disposed at a second radial distance from the axis, wherein the first radial distance is substantially equal to the second radial distance and wherein the bleed valve is configured to have a neutral bias based on a pressure difference acting on the bleed valve;
- and
- a second sealing wall fixed relative to the compressor case and configured to engage the second seal.
A gas turbine engine, comprising:
- a compressor section configured to rotate about an axis, the compressor section comprising:
- a compressor case,
- a bleed valve disposed about the compressor case and configured to translate axially relative to the compressor case,
- a first seal disposed in a forward seal housing of the bleed valve, wherein the first seal is disposed at a first radial distance from the axis, and
- a second seal disposed in an aft seal housing of the bleed valve, wherein the second seal is disposed at a second radial distance from the axis and wherein the bleed valve is configured to have a neutral bias based on a pressure difference based on a pressure difference acting on the bleed valve;
- a combustor section aft of the compressor section and in fluid communication with the compressor section;
- and
- a turbine section aft of the combustor section and in fluid communication with the combustor section.
Dependencies are inferred from the claim text.