Impeller for centrifugal pump and pump including the same

Details Impeller for centrifugal pump and pump including the same Impeller for centrifugal pump and pump including the same

F - Mech Eng,Light,Heat,Weapons

04

D

F04D 7/04 (2006.01) F04D 1/04 (2006.01) F04D 29/24 (2006.01)

Patent

CA 2731127

A centrifugal pump impeller (11) is provided with an impeller body having an in-ner flow path (35) formed therein, and also with a single centrifugal impeller (37) mounted to the impeller body such that the position of an exit (34) is the front edge of the centrifugal impeller and a specific position of the outer peripheral edge of the impeller body is the rear edge of the centrifugal impeller. The centrifugal blade (37) is designed such that the ratio between the area of an outer flow path (36) defined by the cen-trifugal impeller (37), the area having the angu-lar range of 270 degrees in the circumferential direction from the rear edge of the centrifugal impeller (37), and the area of the entire impeller body surrounded by the outer peripheral edge of the impeller body is less than 0.3.

L'invention porte sur une roue à aube de pompe centrifuge (11) qui comporte un corps de roue à aube contenant un trajet d'écoulement interne (35) qui y est formé, et comporte également une unique roue à aube centrifuge (37) montée sur le corps de roue à aube de telle sorte que la position d'une sortie (34) correspond au bord avant de la roue à aube centrifuge et une position spécifique du bord périphérique externe du corps de roue à aube correspond au bord arrière de la roue à aube centrifuge. La roue à aube centrifuge (37) est agencée de telle sorte que le rapport entre la surface de la section d'un trajet d'écoulement externe (36) défini par la roue à aube centrifuge (37), la surface de la section dont la plage angulaire de 270 degrés est dans la direction circonférentielle à partir du bord arrière de la roue à aube centrifuge (37), et la surface de la totalité du corps de roue à aube entourée par le bord périphérique externe du corps de roue à aube, est inférieur à 0,3.

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