FIELD: engines and pumps.
SUBSTANCE: proposed pump is designed to be used as primary stage of radial-flow pump or as axial pump operated in a wide range of output. Pump consists of a screw with variable-pitch vanes 2. Pitch of vanes 2 varies from inlet to outlet with pitch at inlet S1 exceeding that at outlet S2.
EFFECT: higher output and efficiency, improved cavitation characteristics.
3 dwg
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