HEATED REVOLVING RETURN-CIRCUIT RIG OF COMPRESSOR Russian patent published in 2005 - IPC

FIELD: compressor return-circuit rigs of aircraft and ground-based gas-turbine engines.

SUBSTANCE: proposed return-circuit rig characterized in that warm air is uniformly supplied to its guide vanes and escapes to flow path with minimal hydraulic loss has external ring with intermediate bushing wherein corner guide vane is mounted by means of external trunnions; ducts passing warm air to external ring, intermediate bushing, and external trunnion of vane communicating with slit inside vane feather whose inner end and internal ring are separated by radial clearance; novelty is that intermediate bushing is installed in external ring with interference fit and that air ducts are of annular design and enclose intermediate bushing; ratio of slit width inside vane feather to radial clearance between inner end of vane feather and internal ring is 0.5 - 4.3.

EFFECT: enhanced reliability of compressor, prevention of ice formation on vane surface.

1 cl, 3 dwg