Multi-circuit buffer system for a gas turbine engine

摘要

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.

主权项

1. 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.