Eliminating centrifugal pump impeller clearance is too large
. The gap is too large, the ring before and after the pressure difference, high end to the low end of the leakage, and the head of the pump efficiency will decline, and prone to vibration, generally the ring gap wear to the standard clearance 1.5 times recommended replacement.
The clearance of the inner ring is large, and the internal return flow is increased. In theory, the inlet pressure of a little impeller is increased, which is a positive influence on the cavitation performance. But through the impeller of the total flow increased, the pump's cavitation margin will rise, this is a negative impact
Eliminating centrifugal pump impeller clearance is too large:Increase or decrease clearance by adjusting the position of the bearing seat at the end of the bearing case of the centrifugal pump. Loosen the four screw rotating bearing box cover, the shaft will forward or backward forward, only need to use the gap can be a feeler.
