Pumps

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

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F04D 1/00 (2006.01) F04D 7/04 (2006.01) F04D 29/42 (2006.01)

Patent

CA 1160507

ABSTRACT OF THE DISCLOSURE A pump, for example, a centrifugal slurry pump, has a casing with an inlet and an outlet. The casing and a separate backliner define a chamber in which an impeller is arranged to be rotated by way of a drive shaft which extends axially with-respect to the casing. Fine running clearances are defined between the front and rear surfaces of the im- peller and the adjacent surfaces of the casing and the back- liner. In order to compensate for increases of the running clearances, for example, due to erosion, the backliner may be moved axially relative to the casing. The backliner is connected to an annular flange which is bolted to an annular flange connected to the casing and the spacing between the flanges may be adjusted by removing one or more shims pro- vided therebetween.

372498

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