GAS TURBINE ENGINE TURBINE Russian patent published in 2014 - IPC F01D11/22 

FIELD: engines and pumps.

SUBSTANCE: proposed turbine comprises housing, shaft and at least one stage with nozzle guide vanes and impeller with circular insert above every impeller and radial clearance control means of at least one turbine stage. Ring inserts above impeller are secured to mid and inner casings. Said radial clearance control means is composed of radial rods with one end thrusting against mid casing and opposite resting on displacement mechanism. Said displacement mechanism can be made of hydraulic cylinder, or air cylinder, or stepped motor. Swirler can be arranged ahead of impeller and connected with cooling air feed line. Valve is arranged in cooling air feed line. Opening is made in outer housing and communicated with cooling air feed line.

EFFECT: efficient control over radial clearance, higher takeoff and augmenter thrust, efficiency and reliability.

5 cl, 7 dwg