Slurry pump impeller

F - Mech Eng,Light,Heat,Weapons – 04 – D

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F04D 29/22 (2006.01)

Patent

CA 2725536

A slurry pump impeller which includes 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, the pumping vanes being disposed in spaced apart relation. Each pumping vane includes 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 has associated therewith a discharge guide vane, each discharge guide vane being disposed within a respective passageway and located closer to one or the other of the pumping vanes and projecting from the inner main face of at least one of the or each shrouds.

Linvention concerne une turbine de pompe à boue qui comprend un flasque avant et un flasque arrière présentant chacun une face intérieure principale à bord périphérique extérieur et axe central. Plusieurs aubes de pompage s'étendent entre les faces intérieures principales des flasques et sont diposées à distance les unes des autres. Chaque aube de pompage comprend un bord d'attaque dans la zone de l'axe central et un bord de fuite dans la zone des bords périphériques extérieurs des flasques, un passage étant ménagé entre des aubes de pompage adjacentes. Chaque passage est associé à une aube directrice de décharge disposée à l'intérieur d'un passage respectif et située plus près de l'une ou l'autre aube de pompage, dans le prolongement de la face intérieure principale d'au moins un des flasques.

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