What is the difference between the pump body of the single-stage pump and the multi-stage pump?

1. Why is the pump body of the single-stage pump snail-shaped?

Designed according to the free flow trajectory of the liquid after it leaves the impeller. Because the flow area increases gradually as the liquid flows outward in the volute, the flow rate is evenly and slowly, so the kinetic energy is converted into static pressure energy. The outlet portion of the pump is gradually expanding and becomes a place for energy conversion.

2. Why is the pump body of the multistage pump round?

The pump body of the multistage pump is fixed to a guide wheel near the impeller, which guides the liquid from the upper impeller to the lower impeller, and then leads to the pump outlet flow passage. Because there are many guide vanes on the guide wheel, it can also convert energy.