CENTRIFUGAL STAGE CHAMBER TWO-FLOW PUMP Russian patent published in 1997 - IPC

FIELD: stage chamber pumps. SUBSTANCE: the pump uses the central and intermediate stage chambers made in the form of two loops-external suction and internal delivery ones. The suction loop of the central stage chamber is formed by the suction pipe connection and delivery spaces, the delivery loop- by the delivery pipe connection and volute diffuser. The external suction loop of the intermediate stage chambers is made on the guide vane case, its flow area is formed inside by the cylindrical surface of the guide vane case, and from the outside - by the concentric cylindrical wall fastened to the case by ribs made in the form of profiled vanes. The use of one inlet pipe connection and feed in the central stage chamber made in the same base member with a volute diffuser make it possible to install a different number of intermediate stage chambers at the respective variation of the shaft length for variation of pressure head. The delivery pipeline and all pump components remain unchanged for any number of stage chambers for the planned range of pressure heads. EFFECT: enhanced safety of pump operation in case of a seal failure of the delivery space. 2 cl, 2 dwg