What is the pump body of the multi-stage pump and what is its function

Category: Water pump knowledge

2024-07-29

multistage pumpIt is a device widely used in fluid transportation, with complex structure and stable performance, which can meet the needs of liquid transmission in various industrial fields. With regard to the pump body of the multi-stage pump, the following is a detailed introduction.

Overview of 1. multistage pump body

The pump body of the multi-stage pump is its core component and is usually made of high-strength metal materials, such as cast iron and stainless steel. The inside of the pump body is designed with fine flow channels to ensure that the liquid can pass smoothly.

The multistage pump body surrounds the rotating impeller and is provided with a liquid inlet and a tangential outlet perpendicular to the impeller. The multi-stage pump body forms a snail-shaped channel with a gradually expanding cross-sectional area around the impeller, so it is often called a volute. The direction of rotation of the impeller in the shell is along the direction of gradual expansion in the volute-shaped channel (that is, the blades are bent backward according to the direction of rotation of the impeller). The closer to the outlet, the greater the amount of liquid accepted in the shell, so The cross-sectional area of the channel must gradually increase. More importantly, the liquid thrown from the impeller at high speed gradually reduces the speed in the channel, so that a large part of the kinetic energy is converted into static pressure, which improves the pressure of the liquid and reduces the energy loss caused by the excessive flow rate inside the pump. Therefore, the multi-stage pump housing is not only the collection of liquid as the housing of the pump, but also an energy conversion device.

Main structure of 2. pump body

1. Inlet section: the inlet part of the pump body, where the liquid is introduced into the pump.

2. Middle section: the main part of the pump body, where the liquid is stepped up.

3. Water outlet section: the outlet part of the pump body, from which the pressurized liquid flows out.

4. Interstage transition part: connecting the transition area of the impeller at all levels to ensure the smooth transition of the liquid at all levels.

3. the role of the pump body

1. Liquid guide: the pump body provides a flow channel for the liquid to ensure that the liquid can enter and flow out smoothly.

2. Pressure increase: Through the rotation of the impeller of the multi-stage pump, the liquid obtains pressure in the pump body to realize the transportation of the liquid.

3. Energy conversion: the pump body converts the rotary motion of the motor into the pressure energy of the liquid to complete the energy conversion.

4. Smooth transition: The design of the flow channel in the pump body makes the liquid stable during the transition between all levels and reduces the flow loss.

5. Support and positioning: The pump body provides support and positioning for the impeller, shaft and other components to ensure the normal operation of the pump.

4. Summary

The pump body of the multi-stage pump is an important part of the whole pump. Its function is to guide the flow of liquid, increase the pressure of the liquid, realize the energy conversion and ensure the smooth transition of the liquid at all levels. In addition, the pump body also provides support and positioning for the impeller, shaft and other components to ensure the stable operation of the pump.

In practical application, the pump body of multi-stage pump needs to be selected and designed according to specific working conditions to meet different liquid delivery requirements. At the same time, the maintenance and maintenance of the pump body is also very important, which is related to the operating efficiency and life of the entire pump. Therefore, the user needs to regularly check and repair the pump body to ensure that it is in good working condition.

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