TURBO-PUMP UNIT, AND COLD, HOT AND INDUSTRIAL WATER PUMPING METHOD Russian patent published in 2014 - IPC F04D13/04 F01D15/08 F01D5/14 F01D9/02 

FIELD: engines and pumps.

SUBSTANCE: turbo-pump unit includes a turbine assembly with working medium inlet and outlet housings, a nozzle block and a single-stage turbine. The unit includes a pump assembly with a screw centrifugal impeller. The working medium supply housing is equipped with a manifold including an axisymmetrical tight annular cover. The large part of the cover has the shape of a longitudinally flattened fragment of a tore or a toroid. Turbine runner blades are convex-and-concave as to width, radial height of 0.05÷0.25 of the turbine runner disc radius. The blade thickness is accepted as variable in the direction of working medium flow vector with maximum in the middle part of the blade chord width. The chord width of the blade in the projection to a conditional chord plane attaching inlet and outlet side edges of the blade does not exceed radial height of the blade. The inter-blade channel is of a confuser-and-diffuser type in the direction of the steam flow vector with maximum constriction of flow cross sectional area determined in zone of maximum thickness of blades. Total number of turbine runner blades exceeds by 2.6÷34.4 times the number of nozzles in the nozzle block.

EFFECT: increasing service life of a unit, improving reliability and pumping effectiveness, compactness and efficiency at simultaneous reduction of material consumption.

19 cl, 6 dwg