Multi-stage centrifugal pump e.g. submersible motor-driven pump, for drainage of mining industry enterprises in e.g. open pits, has vanes forming channel, where distance of vanes at inlet side corresponds to distance of vanes at outlet side

摘要

The pump e.g. submersible motor-driven pump (1), has impellers (5) formed as closed radial impellers rotatably arranged behind each other in a conveying direction, and a guide wheel (6) arranged between the impellers. The wheel is provided with two guide vanes, which form a return channel. The vanes form a diffusor channel (13) widened in a flow direction of a medium to be conveyed, and a distance of the vanes at an inlet side corresponds to a distance of the vanes at an outlet side of the impellers. The vanes are formed such that the wheel increases static pressure of the medium.