Multi stage centrifugal pump - has bladeless area either side of outlet blades and housing with integral inlet and outlet blades per stage

摘要

Centrifugal multi-stage pump, in which each stage comprises an impeller (4), an axial distributor section (7), and a cadial diverter section (10). The distributor section (7) is formed by an axial portion of the housing mantle (3), outlet guide blades (71), and a fixed impeller shroud ring (8), and there is a blade-less space (9, 9') arranged on either side in axial direction of this section. In each stage, the distributor section (7) and the radial diverter section (10), formed by the forward disc (5), the inlet guide blades (10') and the rearward disc (31), form an integral housing (1) for that stage.