Multi-stage pump is a kind of high-efficiency, energy-saving pump equipment, widely used in all kinds of industrial, agricultural and civil fields. It consists of several main components, each of which has its own unique function and role. The following is the main structure of the multi-stage pump and its function.

Inlet section: The inlet section is the first part of the multistage pump, which is responsible for leading the water flow into the pump. The structure of the inlet section usually has a large flow channel to reduce the resistance of the water flow into the pump to ensure that the water flows smoothly into the pump.

Intermediate section: the intermediate section is a multi-stage pump to connect the impeller components, it has the role of supporting and fixing the impeller. The construction of the intermediate section requires high strength and balance to ensure that the pump can withstand the impact of the water flow and pressure during operation.

Outlet section: the outlet section is another part of the multi-stage pump, it is responsible for the water flow from the pump out. The construction of the outlet section usually has a smaller flow channel to increase the pressure of the water flow, so that it meets the application requirements.

Impeller: The impeller is the main part of the multi-stage pump, which rotates to create the power of the water flow. Impeller usually consists of a number of blades, the shape and number of blades in accordance with the performance requirements of the pump. The manufacturing material of the impeller is usually cast steel or cast iron to ensure that it has better corrosion resistance and wear resistance.

Shaft: The shaft is the rotating part of the multi-stage pump, which is responsible for connecting the motor and the impeller, so that the impeller can rotate. The material of the shaft is usually high strength steel or cast steel to ensure that it has good bending and torsion resistance.

Bearings: Bearings are used to support the shaft and reduce friction when the shaft is rotating. Multi-stage pumps usually use rolling bearings or plain bearings, the specific choice depends on the pump’s operating environment and performance requirements.

Seals: Seals are used to prevent the water inside the pump from leaking to the outside, ensuring the normal operation of the pump. Multi-stage pumps usually use mechanical seals or packing seals to realize the sealing effect. Mechanical seal has a good sealing effect, the advantages of small leakage, suitable for sealing performance requirements of high sites; and packing seal has a simple structure, easy maintenance advantages, suitable for some of the sealing performance requirements of the site is not high.

In short, the multi-stage pump structure includes inlet section, intermediate section, outlet section, impeller, shaft, bearings and sealing devices and other parts. Each part has an indispensable role, together to ensure the efficient and balanced operation of multistage pumps. In the selection and use of multi-stage pumps, you need to fully understand its composition and performance characteristics to ensure that it can meet the practical application requirements.