Centrifugal pump

Details Centrifugal pump Centrifugal pump

1985-07-10

1988-02-23

Garrett, Robert E.

Rotary kinetic fluid motors or pumps

Plural runners having different type flow paths

4151982, F04D 900

Patent

active

047267348

ABSTRACT:
A centrifugal pump which is used to convey a liquefied gaseous fluid has a housing with an inlet which extends axially and an outlet which extends radially of the pump shaft. The shaft drives the impellers of several coaxial stages including a first stage which is a full-admission standard-impeller-type stage, a last stage which is a partial-admission self-priming regenerative stage, and a compressor stage upstream of the first stage. The pump can convey liquefied gases from a vessel which is located at a level well below the housing. If the liquefied fluid is converted back into a gaseous fluid as a result of prolonged idleness of the pump, the compressor stage reconverts the gas into a liquid and such liquid is then conveyed to the regenerative stage by the first stage so that the regenerative stage is ready to immediately proceed with the self-priming operation.

REFERENCES:
patent: 2875698 (1959-03-01), Roth
patent: 3385225 (1968-05-01), Hagemann
patent: 3614256 (1971-10-01), Sieghartner
patent: 4299536 (1981-11-01), Sieghartner et al.
patent: 4390317 (1983-06-01), Lehmann et al.

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