US 12,352,281 B2
Centrifugal slurry pump impeller shroud with lip
Luis Moscoso Lavagna, North Ryde (AU); Garry Bruce Glaves, Eastwood (AU); and Adrian Lionel Bois, Pymble (AU)
Assigned to Weir Minerals Australia Ltd., (AU)
Appl. No. 18/565,695
Filed by Weir Minerals Australia Ltd, Artarmon (AU)
PCT Filed Jun. 24, 2022, PCT No. PCT/AU2022/050650
§ 371(c)(1), (2) Date Nov. 30, 2023,
PCT Pub. No. WO2022/266721, PCT Pub. Date Dec. 29, 2022.
Claims priority of application No. 2021901936 (AU), filed on Jun. 25, 2021.
Prior Publication US 2024/0254999 A1, Aug. 1, 2024
Int. Cl. F04D 29/22 (2006.01); F04D 1/00 (2006.01); F04D 7/04 (2006.01)
CPC F04D 29/2216 (2013.01) [F04D 1/00 (2013.01); F04D 29/2272 (2013.01); F04D 7/04 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A centrifugal slurry pump impeller including:
a back shroud and a front shroud each with opposed inner and outer faces and an outer peripheral edge,
a central axis,
a plurality of pumping vanes extending between the inner faces of the back and front shrouds, the pumping vanes being disposed in spaced apart relation, each pumping vane including opposed main side faces, a leading edge in a region of the central axis and a trailing edge in a region of the outer peripheral edges of the back and front shrouds with passageways between adjacent pumping vanes, wherein the inner faces of the back and front shrouds along a length of the passageways, leading from the leading edges to the trailing edges, includes a planar inner region beginning adjacent the leading edges of the plurality of pumping vanes, and an outer region ending at the outer peripheral edge of the back shroud, wherein the outer region of the inner face of the back shroud includes a lip formation with an apex including a convex surface, and the outer region of the inner face of the front shroud is substantially planar and is in a plane that is substantially perpendicular to the central axis.