Switching bleed valve for a gas turbine engine
AssigneeUnited Technologies Corporation
InventorEnzo DiBenedetto
Life of this patent
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Abstract
A gas turbine engine includes a compressor section having multiple stages, a combustor section fluidly connected to the compressor section, a turbine section fluidly connected to the combustor section, and a bleed structure radially outward of the stages. The bleed structure includes a body structure having a first set of openings radially outward of a first stage and a second set of openings radially outward of a second stage. The bleed structure further includes a circumferential sleeve configured to cover the first set of openings in a first position and configured to cover the second set of openings in a second position. An actuator is coupled to the circumferential sleeve and is configured to articulate the sleeve between the first and second positions.
Claims14
A gas turbine engine comprising:
- a compressor section including a plurality of stages;
- a combustor section fluidly connected to the compressor section;
- a turbine section fluidly connected to the combustor section;
- a bleed structure radially outward of the plurality of stages, the bleed structure including a body structure having a first set of openings radially outward of a first stage and a second set of openings radially outward of a second stage, the bleed structure further including a circumferential sleeve configured to cover the first set of openings in a first position and configured to cover the second set of openings in a second position, the sleeve including a slot, and wherein the body structure includes a post protruding radially into the slot, and wherein the slot is angled relative to an actuation arm of the actuator;
- and
- an actuator coupled to the circumferential sleeve, the actuator being configured to articulate the sleeve between the first and second positions.
A switching bleed valve for a gas turbine engine comprising:
- a body structure having a first set of openings disposed circumferentially about a first edge and a second set of openings circumferentially disposed about a second edge, the body being ring shaped and defining an axis;
- a circumferential sleeve radially outward of the body structure and configured to cover the first set of openings in a first position and configured to cover the second set of openings in a second position, the circumferential sleeve including a slot;
- an actuator coupled to the circumferential sleeve, the actuator being configured to articulate the sleeve between the first and second positions;
- and
- wherein the slot is angled relative to an actuation direction of the actuator such that circumferential actuation of the circumferential sleeve is translated into axial motion of the circumferential sleeve.
A method for adjusting a temperature and pressure of bleed air in a gas turbine engine comprising:
- shifting a circumferential sleeve of a switching bleed valve axially by providing a circumferential actuation via a rack and pinion actuator, and translating the circumferential actuation to an axial motion using at least one follower received in a track of the circumferential sleeve, and thereby covering a first set of bleed openings connected to a first stage of a compressor and uncovering a second set of bleed openings connected to a second stage of a compressor.
Dependencies are inferred from the claim text.