Arrangement for centering the impellers in a multi-stage centrif

Details Arrangement for centering the impellers in a multi-stage centrif Arrangement for centering the impellers in a multi-stage centrif

1977-04-26

1979-10-30

Powell, Jr., Everette A.

Rotary kinetic fluid motors or pumps

Working fluid passage or distributing means associated with...

Plural rigidly related blade sets

415173R, 415176, 415200, 415214, F04D 2922

Patent

active

041726901

ABSTRACT:
The casings, partitions and impellers of neighboring stages of a submersible motor pump consist of synthetic plastic material and are stacked in a cylindrical pump body consisting of metallic material. The shells of the casings are biased axially so that they bulge outwardly into frictional engagement with the pump body, and each casing has a cylindrical hub which spacedly surrounds the nave of the respective impeller. Each impeller has a neck portion which is spacedly surrounded by the adjacent partition. The naves of the impellers are disposed end-to-end and are driven by the pump shaft. The annular gaps between the naves and neck portions of the impellers on the one hand, and the hubs of casings and partitions on the other hand are traversed by fluid streams when the impellers are driven whereby the streams produce forces which center the impellers with respect to the casings and partitions in accordance with the Lomakin effect.

REFERENCES:
patent: 1642914 (1927-09-01), Whann
patent: 2166404 (1939-07-01), Hait
patent: 3070026 (1962-12-01), Lung
patent: 3238879 (1966-03-01), Shallenberg
patent: 3437045 (1969-04-01), Tremain
patent: 3676013 (1972-07-01), Albertson
patent: 3730641 (1973-05-01), Gordon

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