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US 10,330,110 B2Granted
Pump impeller
AssigneeSulzer Management AG
InventorsJean-Noel Bajeet, Ian Cullen
Life of this patent
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Abstract
The present invention provides a pump impeller which has improved anti clogging characteristics, in particular through the use of an impeller vane having a specially profiled leading edge which, during operation of the impeller, forces rags or the like down along the leading edge, which increases in thickness along the length thereof, until the rags become re-entrained in the fluid and thus exit the impeller avoiding the clogging thereof.
Claims16
A pump impeller for use in combination with a wear plate, the pump impeller comprising:
- a single impeller vane defining an interior space through which fluid is displaced, the impeller vane having a leading edge, a trailing edge and an upper rim for location, in use, adjacent the wear plate, wherein the impeller vane comprises a sloping inner wall that crosses a central bore for receiving a main shaft of a pump;
- and
- a shroud from which the impeller vane projects;
- wherein the leading edge is profiled to actively displace solid material entering the impeller in a direction away from the wear plate,
- wherein the leading edge defines a tip at the upper rim and a root at the shroud, the leading edge extending rearward into the impeller vane from the root and curving outward toward the tip such that the leading edge forms a first acute angle with an upper surface of the shroud at the root and a second acute angle with the upper rim at the tip.
2 more elements
Dependencies are inferred from the claim text.