A pump for pumping contaminated liquid including solid matter

Details A pump for pumping contaminated liquid including solid matter A pump for pumping contaminated liquid including solid matter

F - Mech Eng,Light,Heat,Weapons

04

D

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

Patent

CA 2636358

The invention relates to a pump for pumping contaminated liquid including solid matter, comprising an impeller (1), which is rotatable in a pump chamber of said pump, the impeller (1) being movable in the axial direction in relation to a seal housing cover (3) between a first position adjacent to an impeller seat (2) and a second position spaced apart from said impeller seat (2) , said pump also comprising a cavity (17) defined by the seal housing cover (3) and the impeller (1) , and at least one opening gap (20) connecting said cavity and said pump chamber. Furthermore, said opening gap (20) has a first flow area when the impeller (1) is in the first position, and a second flow area bigger than said first flow area when the- impeller (1) is' spaced apart from said first position.

Pompe destinée à pomper un liquide contaminé comprenant des matières solides, comportant une roue à aubes (1) susceptible d'être mise en rotation dans une chambre de pompe de ladite pompe, la roue à aubes (1) pouvant être déplacée dans la direction axiale par rapport à un couvercle (3) de boîtier de joint entre une première position adjacente à un siège (2) de roue à aubes et une deuxième position écartée dudit siège (2) de roue à aubes, ladite pompe comportant également une cavité (17) définie par le couvercle (3) de boîtier de joint et la roue à aubes (1), et au moins un interstice (20) d'ouverture reliant ladite cavité à ladite chambre de pompe. En outre, ledit interstice (20) d'ouverture présente une première aire utile d'écoulement lorsque la roue à aubes (1) se trouve dans la première position et une deuxième aire utile d'écoulement supérieure à ladite première aire utile d'écoulement lorsque la roue à aubes (1) se trouve écartée de ladite première position.

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