Pump for filtration systems

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

Patent

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Details

F04D 13/02 (2006.01) F04D 29/04 (2006.01) F04D 29/10 (2006.01) F04D 29/12 (2006.01) F16D 1/05 (2006.01) F16D 1/08 (2006.01) F16D 1/091 (2006.01) F16D 1/094 (2006.01) F16D 1/096 (2006.01)

Patent

CA 2179193

A pump (20) for pumping fluids in a filtration system is disclosed. The pump (20) has a thrust balancer to reduce axial loads on motor bearings of the pump (20) during operation of the pump (20). A drive system of the pump (20) includes a elongate flexible shaft (32) interconnecting a drive shaft (24) and an impeller shaft (34). The elongate flexible shaft (32) bends and twists to accommodate misalignment during assembly of the drive system. A seal assembly (26) is provided for sealing about a drive shaft (24). The seal assembly (26) is evacuated to prevent pumped fluid from contaminating fluids in a motor (22). A concentric coupling (30) and method for making the same are taught which include a cylindrical block which is concentrically bored and cut into an annular L-shaped segment (100) having an L-shaped notch and semi-cylindrical mating segment (110) which is received into the notch. The coupling concentrically joins a pair of shafts (24,32) together.

Pompe (20) destinée au pompage de fluides dans un système de filtration. Cette pompe (20) présente un dispositif d'équilibrage de poussée permettant de réduire les charges axiales exercées sur les paliers du moteur de la pompe (20) au cours du fonctionnement de celle-ci. Un système de commande de la pompe (20) comprend un arbre flexible et allongé (32) rattachant un arbre d'entraînement (24) et un arbre de rotor (34). L'arbre flexible et allongé (32) se plie et se tord afin de s'adapter à un défaut d'alignement au cours de l'assemblage du système de commande. Un ensemble d'étanchéité (26) est prévu afin d'obturer l'espace autour de l'arbre d'entraînement (24). On crée un vide dans cet ensemble d'étanchéité (26) afin d'empêcher qu'un fluide pompé ne contamine les fluides d'un moteur (22). Un raccord concentrique (30) et son procédé de fabrication sont également décrits, le raccord comprenant un bloc cylindrique qui subit un alésage concentrique et qui est coupé de manière à former un segment annulaire en L (100) doté d'une entaille en L, ainsi qu'un segment cylindrique apparié (110) se logeant dans l'entaille. Ce raccord permet d'accoupler deux arbres (24, 32) de manière concentrique.

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