Patent ID: 9651055
Date: 2017-05-16
CPC Classifications: F04D,Y10T

Claim:
1. A slurry pump impeller comprising a front shroud and a back shroud each having an inner main face with an outer peripheral edge and a central axis, a plurality of pumping vanes extending between the inner main faces of the shrouds to define a width of the pumping vanes therebetween, the pumping vanes being disposed in spaced apart relation, each pumping vane including opposed main side faces one of which is a pumping or pressure side face, a leading edge in the region of the central axis and a trailing edge in the region of the outer peripheral edges of the shrouds with a passageway between adjacent pumping vanes, each passageway having associated therewith a discharge guide vane, each discharge guide vane being disposed within a respective passageway and located closer to the pumping or pressure side face of the closest adjacent pumping vane and projecting from the inner main face of at least one of the or each shrouds to a height that is less than the width of the pumping vanes, and wherein each discharge guide vane has an outer end adjacent the peripheral edge of one of the shrouds, the discharge guide vane extending inwardly and terminating at an inner end which is intermediate the central axis and the peripheral edge of the shroud with which it is associated, and wherein each discharge guide vane is shorter in length than the adjacent pumping vane such that the discharge guide vane in use does not obstruct the free flow of material through the passageway.