Sihi Gmbh & Co Kg

Sihi Gmbh & Co.

Wilfried Lehmann

Hermann Muller

Ralf Mann

Peter Fandrey

Erwin Zimmermann

Bodo Baranek

Centrifugal pump of the sectional-casing design

Centrifugal pump for the delivery of hot liquids

The invention relates to a centrifugal pump having a first centrifugal pump stage (2), which is located on the suction side and is not self-priming, and having a pump inlet nozzle (6), which is located axially at the level of the horizontal shaft (1), and having at least one centrifugal pump stage (3). which is located downstream and which, operating with the aid of auxiliary liquid, is self-priming. According to the invention, the self-priming capability and reliability of the pump, in particular for conveying media in the vicinity of their boiling point, are improved by arranging a liquid reservoir (13), of sufficient size, between two pump stages, the connection from this reservoir to the preceding centrifugal pump stage being located in the geodetically upper portion of the reservoir, and a seal (16) for closing the shaft clearance being located between the liquid reservoir (13) and the preceding centrifugal pump stage.

Self-priming centrifugal pump, in particular for conveying liquids in

A rotary pump assembly including a pump having a pump housing, a pump shaft disposed within the pump housing, a runner mounted concentrically on the pump shaft, a motor having a motor housing, and an intermediate housing interconnected between the pump- and motor-housings. The pump shaft has an end facing the motor, and the pump shaft end is formed as a hollow shaft fittingly mounted on the motor shaft. A bearing support is disposed in the intermediate housing for supporting the hollow pump shaft end, and is formed as an axial bearing with substantially no radial bearing capacity.

Rotary pump assembly

Apparatus for selectively charging and evacuating a separate liquid system such as an engine cooling system, refrigeration system or the like and having a liquid storage tank, a single fluid pump and valve means for selectively connecting both the pump inlet and pump outlet for either pumping liquid from the storage tank via a connector conduit to the separate system or from the separate system via the connector conduit to the storage tank.

Apparatus for filling a hollow and closed system provided with only one

Growing community of inventors

Heiligenstedten, Germany

Wilfried Lehmann