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

FIELD: turbojet by-pass engines.

SUBSTANCE: according to invention, in fan of bypass engine furnished with flow straightening vanes, aerofoil portion of straightening vane is secured by peripheral and inner roots in upper and lower shelves, each consisting of two shelves with radial ribs whose surface adjoins surfaces of vane pressure surface and vane suction face, radial ribs and roots being arranged out of the passage part of straightening vanes and interconnected by rivet joint. Groove is made in radial ribs of lower shelf in inner root of straightening vane from side of compressor axis at L/I=15-30, L/I_l=15-30 where L is radial length of aerofoil portion of straightening vane from side of trailing edge; I is radial length of peripheral root of straightening vane aerofoil portion and radial ribs of upper shelves from passage part of straightening vane; I_l is radial length of inner root of straightening vane and radial ribs of inner shelves from passage part of straightening vane.

EFFECT: improved reliability of fan of by-pass engine owing to increased vibration stability of straightening vanes.

4 dwg