Centrifugal pump is a kind of equipment that drives the impeller to rotate at high speed through an electric motor, so that the liquid is thrown out under the action of centrifugal force, so as to realize the liquid transportation. It has the characteristics of simple structure, convenient maintenance, uniform flow and stable operation, so it has been widely used in industrial production.
The impeller of the centrifugal pump rotates at high speed under the drive of the motor, generating centrifugal force to make the liquid obtain energy, and then it is pressed out through the flow channel of the pump casing to realize the transportation of the liquid. The centrifugal pump has a wide range of flow and head, and is suitable for a variety of different conveying occasions. According to the number of working impellers, centrifugal pumps can be divided into single-stage pumps and multi-stage pumps. The single-stage pump has only one impeller, which is simple in structure, and is suitable for occasions with small flow and low headThe multistage pump has multiple impellers and a high head, which is suitable for occasions with large conveying flow and high head.
There are many forms of impellers for centrifugal pumps, and there are three common types: closed, semi-open and open. The closed impeller has good hydraulic performance and is suitable for conveying liquids containing impurities or particlesSemi-open impellers are suitable for conveying liquids containing larger particles or fibersOpen impellers are suitable for conveying liquids with a high viscosity.
In the process of using centrifugal pumps, it is necessary to pay attention to the temperature, viscosity and other parameters of the liquid, as well as the installation height of the pump, the length and diameter of the suction pipeline and other parameters to ensure the normal operation of the centrifugal pump and prolong the service life. At the same time, it is also necessary to pay attention to the maintenance and maintenance of centrifugal pumps, regularly check the wear and tear of bearings, mechanical seals and other components, replace damaged parts in time, and keep the centrifugal pump in good condition.
In addition to centrifugal pumps, progressive cavity pumps are also a commonly used liquid transfer equipment. The screw pump is suitable for transporting clean water and lightly corrosive liquid media, and has the characteristics of simple structure, stable flow and pressure, stable operation and low noise. In petroleum and petrochemical production, centrifugal pumps and progressive cavity pumps have their own applicable occasions, and the appropriate pump type can be selected according to the actual situation to better meet the production needs.
In short, centrifugal pumps, as an important liquid conveying equipment, have been widely used in industrial production and life. Understanding the structure, working principle and precautions of centrifugal pumps is of great significance for the correct use and maintenance of centrifugal pumps.