Grundfos Management A/s

Lars Ostergaard

Aage Bruhn

The impeller for a centrifugal pump includes a carrier disk and possibly a shroud. The blades of the impeller are identical, but are arranged in pairs such that impellers of different hydraulic characteristics are formed with blades of the same shape.

Impeller for a centrifugal pump

An axial face seal (), which seals a pump housing in the region of the pump shaft (), is constructed in an axially compact manner. Spring holders (), which transmit the required pressing force of a compression spring (), are connected to one another with a positive fit in a rotation direction, and hold a rotating axial face seal ring () in a rotationally fixed manner to the pump shaft (). The spring holders () are compact and enclose an abutment ring () for pump impellers as well as the compression spring (). A motor-side spring () engages over the rotating axial face seal ring (), by which an axially extremely short constructional length is achieved.

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Randers NV, Denmark

Lars Ostergaard