Effect of Number of Blades of Slurry Pump on Lift


Published:

Dec 25,2023

Lift is one of the most important parameters in slurry pump selection. The following is the influence of the number of blades of the slurry pump on the theoretical lift.

Effect of Number of Blades of Slurry Pump on Lift

Lift is one of the most important parameters in slurry pump selection. The following is the influence of the number of blades of the slurry pump on the theoretical lift.

The basic equations of the slurry pump are derived based on the assumption of infinite number of blades. Since the slurry pump impeller has a large number of blades and a long flow channel, it can better define the trajectory of liquid movement in the flow channel, so the hypothesis is closer to the actual situation. However, as the pump speed increases, the impeller diameter shrinks, the number of blades decreases, and the flow channel becomes wider, making the assumed flow significantly different from the actual liquid flow situation. In an impeller with an infinite number of blades, the distance between the blades is extremely small. The liquid is constrained by the blades and has no room for free movement. It can only flow out of the rotating impeller along the blade gaps. The relative streamlines of the liquid are related to the blades. The shape is exactly the same; in the impeller with a limited number of blades, the degree of liquid clamping by the blades is greatly weakened, so that the inertia of the liquid can be revealed. The actual flow in the impeller can be approximately considered as the superposition of the axial vortex flow and the uniform flow (through flow) flowing through the stationary wheel. The superposition of the two flows causes the relative speed of the impeller mouth to slip.

Keyword:

SLURRY PUMP ,IMPELLER