CENTRIFUGAL PUMP IMPELLER Russian patent published in 2000 - IPC

FIELD: hydraulic machine engineering. SUBSTANCE: centrifugal pump impeller has disks and spatial working blades rigidly interconnected by shanks of blades fitted in disk body. Surfaces of spatial working blades and shanks are made as ruled surfaces formed by straight lines crossing and intersecting out of blades, and shanks are made in form of dovetail. Shanks are poured with hot melt forming the disks when moulding impellers and form joint inseparable even at local defects of impeller. Blade material melting temperature should exceed melting temperature of impeller disk material. EFFECT: increased economy and improved reliability of pump owing to reduced hydrodynamic losses. 2 cl, 1 dwg