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US 2009/0022582 A1Published application
Pump for pumping contaminated liquid including solid matter
AssigneeITT Manufacturing Enterprise, Inc.
InventorPatrik Andersson
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AssigneeITT Manufacturing Enterprise, Inc.
InventorPatrik Andersson
Estimating the term…
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.
A pump for pumping contaminated liquid including solid matter, comprising an open 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 radial opening gap (20) connecting said cavity and said pump chamber, wherein said opening gap (20) has a first flow area when the impeller (1), in the normal operation of the pump 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.
Dependencies are inferred from the claim text.