Magnetically coupled centrifugal pump with improved casting and

Details Magnetically coupled centrifugal pump with improved casting and Magnetically coupled centrifugal pump with improved casting and

1992-11-02

1993-09-28

Bertsch, Richard A.

Pumps

Motor driven

Including means utilizing pump fluid for augmenting cooling,...

417369, 417420, 415110, 4151701, F04B 1700

Patent

active

052482456

ABSTRACT:
A magnetically coupled centrifugal pump comprising a pump housing containing a pumping chamber and having an inlet and an outlet, a shaft mounted in the pump housing for rotation, a pump impeller attached to the forward end of the shaft for rotation with the shaft in the pumping chamber and a first magnet attached to the rear end of the shaft, the first magnet adapted to be magnetically coupled to a second magnet rotated by a rotary driving device, the shaft being mounted in at least two bearings spaced from each other along the length of the shaft and located between the impeller and the first magnet, a shell surrounding the shaft bearings and first magnet to seal the pump from the exterior and prevent the pumped fluid from leaking, the shell being located between the two magnets and being able to transmit magnet forces between the two magnets for magnetically coupling the two magnets together, the pump housing containing a passage for conducting cooling fluid from the discharge of the pump impeller to the bearings and the shell, the passage dividing the cooling flow into parts such that the cooling fluid cools the bearings and the shell in parallel.

REFERENCES:
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patent: 4780066 (1988-10-01), Hauenstein
patent: 4838763 (1989-06-01), Kramer et al.
patent: 4850818 (1989-07-01), Kotera
patent: 4871301 (1989-10-01), Buse
patent: 5017102 (1991-05-01), Shimaguchi et al.
patent: 5160246 (1992-11-01), Horiuchi
Heald, Behnke & Gussert, "Development and Qualification of a Magnetically Coupled Process Pump for API 610 7th Edition Services", Proceedings of the Ninth International Pump Users Symposium, 1992.

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