CENTRIFUGAL SLURRY PUMP HAVING ANNULAR SEAL SLOPING TOWARDS DIRECTION OF INLET MAIN FLUID FLOW FOR REDUCED IMPELLER WEAR

摘要

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 0 DEG and 60 DEG to the axis of rotation of the impeller (2).