FIELD: mechanical engineering.
SUBSTANCE: turbine contains a wheel with multiple grooves located between wheel projections and multiple blades. Each blades and each groove has interleaved system of recessions and bosses with the result that blades can be fitted singly in grooves on the wheel. Each of the recessions and bosses is formed by combination of curved and straight surfaces. Each recession contains two straight portions located at an angle to each other and curved portion connecting two straight portions. The recessions formed on blade have angles between their straight portions in the range of 50° to 57°. Each of the blades has lower boss formed by curved surfaces with more than one curvature. Another invention of the group refers to blade of above mentioned turbine and has described above design.
EFFECT: inventions make possible to lower stresses in turbine wheel and to increase allowable load transferred from blade to wheel.
13 cl, 15 dwg
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