FIELD: machine building.
SUBSTANCE: invention relates to the field of hydraulic engineering, namely to centrifugal single-stage pumps for pumping liquids. Pump comprises a housing with semi-helical delivery channels and a spiral channel for withdrawing the working fluid and a replaceable impeller installed therein. Wheel is single-flow with a flowing part communicated only to one of the half-helical feed channels. In the other half-helical feed channel, a sealing element is provided forming, together with the housing, a slit seal symmetrical to the slit seal formed between the cover plate of the impeller and the body. Impeller is installed behind the impeller.
EFFECT: invention is aimed at increasing the efficiency of a single-stage centrifugal single-stage pump on main pipelines operated at low feed rates due to an increase in the efficiency of the replacement impeller of the pump.
7 cl, 2 dwg
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