Impeller pumps

Details Impeller pumps Impeller pumps

1989-09-07

1992-03-31

Wayner, William E.

Fluid reaction surfaces (i.e., impellers)

Diverse impellers or working members

415143, 416183, B63H 100

Patent

active

051002957

ABSTRACT:
A mixed-flow impeller pump, which may be used, for example, as a primary pump for circulating sodium as the primary coolant in a fast nuclear reactor, comprises an impeller with evenly-spaced blades. Some of the blades, which are symmetrically disposed around the axis of rotation of the impeller, extend beyond the ends of the other blades towards the suction side of the pump to form an inducer. The channels defined between the extensions of the extended blades follow helical paths parallel to the axis of rotation. The leading edges of the unextended blades are interposed between the extended blades in the region of divergence of flow from the axis of rotation. The provision of the inducer reduces the risk of cavitation in the pump, which could cause rapid wear of the impeller.

REFERENCES:
patent: 2761393 (1956-09-01), DiStefano et al.
patent: 3153119 (1964-12-01), Huppert et al.
patent: 3644056 (1972-02-01), Wiselius
patent: 3953150 (1976-04-01), Onal
patent: 4443152 (1984-04-01), Wong et al.
patent: 4530639 (1985-07-01), Mowill
patent: 4826398 (1989-05-01), Gullichsen

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