The main part of the pump casing, the guide shell, the upper bearing jacket and the lower bearing jacket. In order to meet the needs of head, a multi-stage centrifugal pump is composed of many identical single stage centrifugal pumps.
1.The structural characteristics of the submersible multistage centrifugal pump:
1).Diameter is small, the series is many, the length is big.
2).Axial unloading, radial.
3).Pump suction inlet with a special device
4).The upper part of the pump outlet is provided with a single flow valve and a relief valve.
2.The working principle of the submersible multistage centrifugal pump :
When filled in the impeller in the liquid under the centrifugal flow Q along the blade from the impeller center to the impeller thrown around, liquid by blade, the pressure and velocity increases at the same time, and the guide wheel is directed to a secondary impeller flow channel. In this way, step by step through all of the impeller and the guide wheel, the liquid pressure can further increase, get a lift on stage stacking, which will lift the well liquid to the ground.
