BY-PASS GAS-TURBINE ENGINE Russian patent published in 2004 - IPC

FIELD: mechanical engineering; gas-turbine engines. SUBSTANCE: proposed by-pass gas-turbine engine with outer and inner circuit channels contains high-pressure compressor with cooled radial-thrust bearing, combustion chamber and low-pressure turbine with cooled radial bearing. Relief space is made behind high-pressure compressor. Space to deliver cooling air to high-pressure turbine rotor, air spaces for cooling oil spaces of compressor and turbine bearings, and relief space are connected with intermediate air space located under inner housing of combustion chamber and connected at outlet with outer circuit channel through pipes at combustion chamber inlet. EFFECT: improved reliability and economy owing to minimization of pressure differential across shaft casing and axial loads on radial-thrust bearing of compressor. 4 dwg