Ksb Aktiengesellschaft

Wolfgang Metzinger

Peter Hergt

Rolf Witzel

Sonke Brodersen

Paul Krieger

A guide apparatus for use with centrifugal pumps which transport fluids that contain foreign bodies. The guide apparatus includes a plurality of guide blades. Each of the guide blades has a predetermined width. Each guide blade has a rounded guide-blade protrusion which has a rounding radius. A ratio of the rounding radius to the width of the guide blade ranges from 0.15 to 0.5. Each of the guide blades, in an inlet area of the guide apparatus, has an approach angle. The approach angle corresponds to an angle between a direction of a tangent to a curve of the path of a fluid particle in the transported liquid and a tangent to a circle about a rotational axis of the pump. Each of the guide blades outlet edge is disposed steeper than the guide blade inlet edge by such an amount that the flow of fluid substantially always approaches the guide blade in a manner so as to represent a partial load.

Guide apparatus for centrifugal pumps

A centrifugal pump impeller for delivering solids-containing media includes a blade having a beginning portion. In the plane of the middle blade surface, there is, in front of the blade beginnings, a very fiat transition from the impeller covering disks to the blade beginnings.

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Pegnitz, Germany

Wolfgang Metzinger