Pump and pump impeller

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

Patent

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Details

F04D 29/24 (2006.01) F04D 7/04 (2006.01)

Patent

CA 2688175

A pump assembly that includes a pump housing defining an inlet for receiving fluid to be pumped and an outlet for discharging fluid. A rotatable impeller operatively coupled to a drive motor includes a plurality of vane structures integrally formed with a shroud. Each vane structure includes a curved, axial vane segment extending axially from the shroud. A compound, multi-step auxiliary vane extends transversely from each axial vane segment. The auxiliary vane or wing includes at least first and second sections, with the second section overlying the first section in a staggered configuration such that the trailing edges of the first and second sections are spaced apart to form a step. The second auxiliary vane section includes an axial surface that also forms a working vane surface for the auxiliary vane.

L'invention concerne un ensemble pompe qui comprend un boîtier de pompe définissant une entrée destinée à recevoir un fluide devant être pompé, et une sortie destinée à l'évacuation d'un fluide. Une turbine rotative couplée de manière opérationnelle à un moteur d'entraînement comprend une pluralité de structures d'aube formées en un seul bloc avec un flasque. Chaque structure d'aube comprend un segment d'aube axial incurvé s'étendant axialement depuis le flasque. Une aube auxiliaire à gradins multiples combinés s'étend transversalement à partir de chaque segment d'aube axial. L'aube ou l'aile auxiliaire comprend au moins des première et seconde sections, la seconde section recouvrant la première section selon une configuration décalée de telle sorte que les bords de fuite des première et seconde sections sont espacés pour former un gradin. La seconde section d'aube auxiliaire comprend une surface axiale qui forme également une section d'aube de travail pour l'aube auxiliaire.

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