High performance centrifugal pump having an open-faced impeller

Details High performance centrifugal pump having an open-faced impeller High performance centrifugal pump having an open-faced impeller

1993-11-24

1995-06-27

Look, Edward K.

Rotary kinetic fluid motors or pumps

With means for re-entry of working fluid to blade set

Radial flow runner portion guides re-entry working fluid

415 583, 415 584, 415 591, 415106, 4151721, 4151733, F04D 2940

Patent

active

054274982

ABSTRACT:
The centrifugal pump with an open-faced impeller comprises at least one open-faced impeller having blades placed inside a casing defining both a delivery pipe and a suction pipe facing the base of the blades situated in the vicinity of a central shaft for driving the impeller. An active axial balancing system for the rotary assembly is integrated in the impeller and comprises a balancing chamber interposed between the rear face of the body of the impeller and an outer rear portion of the casing, the impeller itself acting as the balancing turntable. A shroud-forming intermediate part is prevented from rotating relative to the casing and is interposed between an outer front portion of the casing and the impeller, a cavity is formed between the outer front portion of the casing and the intermediate part to receive a back pressure of predetermined value serving, in operation, to maintain small clearance without contact between the intermediate part that is prevented from rotating and the blades of the impeller.

REFERENCES:
patent: 1385115 (1921-07-01), Cone
patent: 1488931 (1924-04-01), Marechal
patent: 4264271 (1981-04-01), Libertini
patent: 4687412 (1987-08-01), Chamberlain
"Centrifugal Pump With Semi-Open Impeller", Anop et al, Soviet Invention Illustrated, Sep. 1971, Derwent Publications Ltd. London, G.B. p. 24.

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