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

FIELD: mechanical engineering; high by-pass ratio engines.

SUBSTANCE: invention relates to fans of by-pass turbojet engines with high by-pass ratio. According to invention, in fan of turbojet engine containing straightening blades with upper and lower flanges and aerofoil portion n between, L-shaped antivibration flanges are secured on aerofoil portion of straightening blades of fan from side of suction face of blade and blade pressure surface, being connected with overlapping by fastening members at L/1=1.7-2.3; H/h=1.1-1.5 and m/n=1.4-2.1 where L is radial height of aerofoil portion of straightening blade over its trailing edge; 1 is radial distance from upper flange of straightening device to antivibration flange from side of suction face of blade; H is radial thickness of antivibration flange from side of suction face of blade; h is radial thickness of antivibration flange from side of blade pressure surface; m is peripheral length of antivibration flange from side of suction face of blade; n is peripheral length of antivibration flange from side of blade pressure surface.

EFFECT: improved reliability and increased efficiency of fan owing to reduction of vibration stresses on aerofoil portion of straightening blades.

3 dwg