Improved velocity profile impeller vane

B - Operations – Transporting – 63 – H

Patent

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Details

B63H 1/16 (2006.01) B64C 11/00 (2006.01) B64C 27/20 (2006.01)

Patent

CA 2558869

In accordance with the present invention, an impeller for use in a centrifugal pump has at least one vane the radially outer terminal end of which is configured to produce a flow velocity profile that controls and reduces the wear caused by slurry fluid being expelled from the impeller on the inner surface of the pump casing. The impeller vanes of the present invention are generally configured with a radially outwardly extending portion, as compared with the conventional straight or concave edge of an impeller vane. The outwardly extending portion may vary in shape, but is selected to produce a flow velocity profile that reduces wear in the pump casing.

La présente invention se rapporte à une roue destinée à être utilisée dans une pompe centrifuge. La roue selon l'invention comprend au moins une aube, dont l'extrémité terminale radialement externe est adaptée pour générer un profil de vitesse d'écoulement qui régule et réduit l'usure causée par l'expulsion de fluide en suspension épaisse de la roue sur la surface interne du corps de pompe. Les aubes de roue selon l'invention sont généralement dotées d'une partie s'étendant radialement vers l'extérieur, à la différence du bord droit ou concave des aubes de roue classique. La forme de la partie s'étendant vers l'extérieur peut varier, mais est sélectionnée de manière à générer un profil de vitesse d'écoulement qui réduit l'usure du corps de pompe.

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