Patent ID: 8870522

Claim:
A centrifugal pump ( 1 ), comprising: a housing ( 3 ) with a pumping chamber ( 5 ) and a dry space ( 7 ), a drive shaft ( 13 ) rotatably supported with respect to the housing ( 3 ) with an impeller ( 11 ) mounted on the drive shaft ( 13 ) for rotation therewith for pumping a liquid flow medium M disposed in the pumping chamber ( 5 ), and a shaft seal arranged in an inner radial area R i for sealing the dry space ( 7 ) with respect to the flow medium (M), and at least part of the shaft seal being fixed to a seal carrier ( 15 ) connected to the housing ( 3 ), the seal carrier ( 15 ) having a surface area which axially faces the impeller ( 11 ) and which is provided with a guide structure (L) by which, with the impeller ( 11 ) rotating during operation, a flow medium (M) is conducted from an outer radial area (R a ) to the inner radial area (R i ), the guide structure (L) including at least a guide area which projects axially from the surface area (F), and which extends in a straight line at an angle with respect to a direction of rotation (D) of the impeller ( 11 ) and extends in the form of a secant from the radially outer area (R a ) tangentially to the circumference of the drive shaft ( 13 ) to the inner area (R i ) and back to the radial outer area.