GAS TURBINE COOLED NOZZLE GUIDE VANE Russian patent published in 2004 - IPC

FIELD: mechanical engineering; gas turbines.

SUBSTANCE: proposed cooled nozzle guide vane of gas turbine has first and second spaces in direction of gas flow, perforated deflector in second space and deflector stops located between deflector and vane from side of vane pressure surface and suction face of vane in second space. Deflector is made in form of clamp open in front. In free state curvature of deflector from side of suction face of vane is less than curvature of vane suction face, and from side of vane pressure surface is greater than curvature of vane pressure surface. Pin with cams is installed in middle length part of deflector profile from inside. Cams thrust against deflector, being arranged at distance from each other. Cross partition between spaces in cooled nozzle guide vane can be set at angle of 50-70^o to normal to surface of vane pressure surface to wards side of leading edge. Cams of pin thrust against deflector between its stops. Deflector stops are made in form of horizontal ribs on inner surface along its profile being located between cams of pin. Assembling and disassembling of such vane do not require complex tooling which decreases labor input.

EFFECT: provision of more complete contact of deflector over support elements from side of vane suction face and pressure, improved efficiency of cooling.

4 cl, 3 dwg