| 摘要 |
FIELD: engines and pumps. ^ SUBSTANCE: turbine incorporates fixed guide nozzle box and at least one vane wheel rotor, fitted on the shaft, with shaped grooves made along rotor edges, the groove side walls furnished with ledges and recesses. Arc-like cross section rotor blades seat in the said grooves and comprise upper and lower cross plates with their lateral sides abutting on cross plates of adjacent blades. Blade width, over its cross section profile convex side, makes 0.6 and more of the length of its operating part. Turbine wheel arc-like shaped grooves feature variable cross section area. Aforesaid groove side wall ledges and recesses are formed by different-diametre arcs lying in parallel planes. The centers of the said arcs are located on parallel straight lines run within the limits of the rotor, nearby its rear end face plane. Blade root cross section profile matches that of the wheel groove cross section, when blade moves along the wheel groove. Lower and upper cross plates feature arc-like shape, with their side surfaces formed by arcs. The said arcs centers lye on one of parallel straight lines. The centers of arcs that form appropriate adjacent wheel grooves lye on aforesaid parallel straight lines and on straight line displaced from the said parallel straight line through angle =360/n, where n is the number of turbine rotor blades. ^ EFFECT: higher efficiency of turbine. ^ 4 dwg |
