TWO-SHAFT GAS-TURBINE ENGINE Russian patent published in 2005 - IPC

FIELD: manufacture of gas-turbine engines.

SUBSTANCE: proposed gas-turbine engine includes low-pressure compressor with load-bearing intermediate casing and high-pressure compressor with swivel inlet guide apparatus and rotor mounted on bearing on side of first impeller of high-pressure compressor. Provided at outlet of intermediate casing on its bush is taper surface directed towards flow section of high-pressure compressor, thus forming slotted cavity with front baffle plate of ring of internal inlet guide apparatus of high-pressure compressor; this slotted cavity is connected with oil cavity and intermediate inlet cavity at outlet through inter-labyrinth cavity and labyrinth seals. Angle of generatrix of cone of taper surface of bush of load-bearing intermediate casing ranges from 10 to 40 deg. Ratio of height of blade of swivel inlet guide apparatus of high-pressure compressor to height of slotted cavity between taper surface of bush of load-bearing intermediate casing and baffle plate of inner ring of swivel guide apparatus of high-pressure compressor is equal to 30-70.

EFFECT: enhanced reliability of engine due to increased service life of oil support of front bearing of high-pressure compressor and avoidance of leaks.

2 dwg