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US 8,769,962 B2Granted
Multi-circuit buffer system for a gas turbine engine
AssigneeUnited Technologies Corporation
InventorsJorn A. Glahn, William K. Ackermann, Clifton J. Crawley, Philip S. Stripinis
Life of this patent
Estimating the term…
Abstract
A gas turbine engine includes a buffer system that includes a first circuit and a second circuit. The first circuit can communicate a first buffer supply air to a first portion of the gas turbine engine and the second circuit can communicate a second buffer supply air to a second portion of the gas turbine engine.
Claims22
A gas turbine engine, comprising:
- a buffer system that includes a first circuit that communicates a first buffer supply air to a first portion of the gas turbine engine and a second circuit that communicates a second buffer supply air to a second portion of the gas turbine engine, wherein said first buffer supply air and said second buffer supply air address different pressure requirements of separate bearing compartments to contain lubricant within said separate bearing compartments;
- wherein said first buffer supply air and said second buffer supply air do not share a common source of air within the engine;
- wherein said first circuit includes a first bleed air supply, a second bleed air supply and a valve;
- and
- wherein said second circuit includes a first bleed air supply, a second bleed air supply, a valve and a conditioning device.
2 more elements
A gas turbine engine, comprising:
- a compressor section;
- a combustor in fluid communication with said compressor section;
- a turbine section in fluid communication with said combustor;
- a buffer system including a first circuit that supplies a first buffer supply air and a second circuit that supplies a second buffer supply air;
- wherein said first buffer supply air and said second buffer supply air do not share a common source of air within the engine,
- wherein said first circuit addresses a component subject to a first pressure requirement of the gas turbine engine with said first buffer supply air to contain lubricant within said component;
- and
- wherein said second circuit addresses a second component subject to a second pressure requirement of the gas turbine engine that is different from said first pressure requirement with said second buffer supply air to contain lubricant within said second component;
- wherein said first circuit includes a first bleed air supply, a second bleed air supply and a valve;
- and
- wherein said second circuit includes a first bleed air supply, a second bleed air supply, a valve and a conditioning device.
8 more elements
A method of cooling a portion of a gas turbine engine, comprising:
- addressing a component subject to a first pressure requirement of the gas turbine engine with a first buffer supply air from a first circuit of a buffer system to contain lubricant within the component;
- and
- addressing a second component subject to a second pressure requirement of the gas turbine engine that is different from the first pressure requirement with a second buffer supply air from a second circuit of the buffer system to contain lubricant within the second component, the first buffer supply air and the second buffer supply air do not share a common source of air within the engine;
- wherein said first circuit includes a first bleed air supply, a second bleed air supply and a valve;
- and
- wherein said second circuit includes a first bleed air supply, a second bleed air supply, a valve and a conditioning device.
3 more elements
A gas turbine engine, comprising:
- a buffer system that includes a first circuit that communicates a first buffer supply air to a first portion of the gas turbine engine and a second circuit that communicates a second buffer supply air to a second portion of the gas turbine engine, wherein said first buffer supply air and said second buffer supply air address different pressure requirements of separate bearing compartments to contain lubricant within said separate bearing compartments;
- and
- wherein each of said first circuit and said second circuit include at least two bleed air supplies, and said at least two bleed air supplies of said first circuit are completely separate from said at least two bleed air supplies of said second circuit.
Dependencies are inferred from the claim text.