Centrifugal pump impeller with tapered shroud
AssigneeWeir Minerals Australia Ltd.
InventorMichael George Dern
Life of this patent
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Abstract
An impeller for a centrifugal pump has an inlet through which fluid passes into the impeller as well as pumping vanes for pumping the fluid from the inlet and expelling the fluid into a pumping chamber of the centrifugal pump in which the impeller operates, and the impeller also has at least one shroud extending radially from an axis of rotation for the impeller and attached to the pumping vanes, the at least one shroud having a planar portion located towards a center of the impeller and a tapered portion located towards an outer edge of the shroud, the tapered portion being a compound shape and having a concave and a convex region.
Claims7
An impeller for a centrifugal slurry pump, the impeller comprising:
- an inlet through which fluid passes into the impeller;
- pumping vanes for pumping the fluid from the inlet and expelling the fluid into a pumping chamber of the centrifugal pump in which the impeller operates;
- and
- at least one shroud extending radially from an axis of rotation for the impeller and attached to the pumping vanes, the at least one shroud having an outer surface facing away from the pumping vanes, wherein the at least one shroud includes a planar portion and a tapering portion associated with the outer surface of the at least one shroud, the planar portion located near a centre of the impeller and the tapering portion located at an outer edge of the at least one shroud so that the respective shroud tapers continuously from the planar portion to the outer edge, each tapering portion being a compound shape with contiguous concave and convex regions.
Dependencies are inferred from the claim text.