SYSTEM OF BLADES COOLED BY MEANS OF SPIRAL GUIDE SURFACE, CASCADE COLLISION AND SYSTEM WITH BRIDGES IN DOUBLE SHELL Russian patent published in 2000 - IPC

FIELD: mechanical engineering; turbines; cooled turbine blades. SUBSTANCE: inner space of proposed blade is divided into three spaces 11, 12, 13 by two radial partitions 9.10. Front space 11 in direction of flow has part with screw guide surface 30 and is supplied with cooling air in root part of this blade 3 through inlet hole 22. Middle space 12 is also supplied with cooling air in root part of blade 3 and is provided with perforated housing divided into compartments. Cooling air is removed from each compartment through collision holes and it passes into following compartment through special slots. Finally air is directed into hot gas flow of this turbine through hole in blade head. Side walls of blade opposite to rear space 13 in direction of flow have double shell with bridges. Cooling air passes through these double shells and then centripetally passes into front part 15 of rear space 13 in direction of flow and then gets into rear part 16 of rear space 13 in direction of flow for subsequent discharge through slots 19 made in rear edge 6 of this blade. Third radial partition 14 divides rear space 13 in direction of flow into two parts 15 and 15. EFFECT: reduced consumption of air for blade cooling, increased efficiency of turbine. 7 cl, 14 dwg