A pump

Details A pump A pump

F - Mech Eng,Light,Heat,Weapons

04

D

F04D 7/04 (2006.01) F04D 29/22 (2006.01)

Patent

CA 2610567

The invention relates to a pump for pumping contaminated liquid including solid matter, comprising a pump housing provided with a rotatable impeller (3) having at least one vane (9) and an impeller seat (4), the impeller seat (4) presenting at least one recess (13) in the top surface (11) thereof, a sheering/cutting action arising between an cutting edge (15) of said recess (13) and a lower edge (14) of the vane (9) as the impeller (3) rotates relative to the impeller seat (4) . Furthermore, the pump also comprises means for guiding the solid matter towards said recess (13) , the guiding means comprising at least one guide pin and at least one projection (20) , an upper surface (19) of the guide pin extending from a position contiguous to the most inner part of the vane (9) of the impeller (3) towards the impeller seat (4), and the projection (20) protruding from the impeller seat (4) .

La pompe selon l'invention permet de pomper du liquide contaminé comprenant des matières solides et comprend un boîtier de pompe pourvu d'une turbine rotative (3) ayant au moins une aube (9) et un siège de turbine (4), le siège de turbine (4) présentant au moins un renfoncement (13) dans sa surface supérieure (11), une action de tranchage/coupe survenant entre un bord d'attaque (15) dudit renfoncement (13) et un bord inférieur (14) de l'aube (9) lorsque la turbine (3) tourne par rapport au siège de turbine (4). En outre, la pompe comprend également des moyens de guidage de la matière solide vers ledit renfoncement (13), les moyens de guidage comprenant au moins une colonne de guidage et au moins une partie saillante (20), une surface supérieure (19) de la colonne de guidage s'étendant d'une position adjacente à la partie la plus intérieure de l'aube (9) de la turbine (3) vers le siège de turbine (4) et la partie saillante (20) ressortant du siège de turbine (4).

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