Multistage centrifugal pump with canned magnetic bearing

F - Mech Eng,Light,Heat,Weapons – 04 – D

Patent

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Details

F04D 29/04 (2006.01) F04D 1/06 (2006.01)

Patent

CA 2174662

A multistage centrifugal pump for increasing the pressure of a product fluid passing through it. The pump includes a casing (12), an impeller shaft (18) mounted for rotation within the casing (12) and a plurality of impellers (28) mounted back-to-back on the impeller shaft. A canned magnetic radial bearing (26) is mounted around the outboard end (22) of the impeller shaft (18) and a magnetic thrust bearing (44) and a magnetic radial bearing (24) are mounted around the drive end (20) of the impeller shaft. The pump is free of any product fluid return line connecting the product fluid chambers at the drive and outboard ends of the shaft.

Pompe centrifuge à étages multiples permettant d'augmenter la pression d'un produit fluide la traversant. Cette pompe comprend un carter (12), un arbre (18) à roues monté rotatif dans le carter (12), ainsi qu'une pluralité de roues (28) montées dos à dos sur l'arbre à roues. Un palier magnétique radial (26) à gaine est monté autour d'une extrémité externe (22) de l'arbre (18), et un palier de buée magnétique (44) ainsi qu'un palier magnétique radial (24) sont montés autour de l'extrémité d'entraînement (20) de l'arbre. La pompe est dépourvue de toute conduite de retour de fluide produit reliant les chambres de fluide produit au niveau des extrémités d'entraînemnt et externe de l'arbre.

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