MULTISTAGE RADIAL TURBINE Russian patent published in 2014 - IPC F01D1/06 

FIELD: engines and pumps.

SUBSTANCE: proposed turbine comprises rotary shaft, set of rotor blades, set of nozzles and connection channel. Rotor blades are fitted on the shaft and spaced apart thereat to direct working fluid flow in, in fact, lengthwise direction. Nozzles are arranged at top upstream part of every rotor blade to accelerate working fluid flow. Connection section has curved U-like section, blade section and inverse bend section. Said curved U-like section deflects working fluid flow from rotor blade radially outward in lengthwise direction. Blade section comprises a set of blades deflecting working fluid flow in direction of blades rotation, from said curved U-like section radially outward. Said inverse bend section deflects the flow radially inward, flow flowing from blade section radially outward. Said curved U-like section features cross-section area nearby blade section, downstream of section end, not exceeding 0.8-0.9 of its across-section area nearby the end proximate to radial turbine rotor blade, at its upper side.

EFFECT: decreased leaks via turbine shaft support bearings.

2 cl, 2 dwg