Impeller annular seal

Details Impeller annular seal Impeller annular seal

F - Mech Eng,Light,Heat,Weapons

04

D

F04D 29/08 (2006.01) F04D 29/16 (2006.01) F04D 29/22 (2006.01)

Patent

CA 2063624

Centrifugal pumps suffer from wear of the annular seal (1) between the impeller (2) and the casing or side liner (3), due to the returning flow of the rejoining fluid (9). The present invention ameliorates this problem by having the clearance of the annular seal (10, 11) at least adjacent the inlet (6) of the impeller (2) sloping, in the direction of the main fluid flow (7) into the impeller inlet (6), at an angle of between 0À and 60À to the axis of rotation of the impeller (2).

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