FIELD: engines and pumps.
SUBSTANCE: rotary pump impeller comprises, at least, two vanes with different mounting angle βL1. All vanes are arranged with constant pitch a and identical mounting angle βL2. In particular case, vane with said angle βL1 fitted in symmetry about impeller center corresponds to every vane. Impeller may comprises three pairs of vanes with different angles βL1.
EFFECT: higher pump efficiency.
5 cl, 3 dwg
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