Principle of vertical multistage centrifugal pump:

When the centrifugal impeller on the shaft is driven by the motor to run at a high speed, the liquid filled in the centrifugal impeller is thrown around the centrifugal impeller from the centrifugal impeller management center along the passage between the leaves under the effect of centripetal force. Because the liquid is affected by the effect of the leaves, the working pressure and speed are increased, and is led to the secondary centrifugal impeller through the passage of the guide shell, Based on this basic principle, it passes through all centrifugal impellers and guide shells for many times to further improve the working pressure and kinetic energy of the liquid. After each centrifugal impeller is gradually accumulated, the pump head is obtained.

The vertical multistage centrifugal pump adopts superior hydropower entity model and good manufacturing and processing technology to further improve the characteristics and service life of the pump.

1. The column type adopts superior hydraulic power generation solid model and good manufacturing and processing technology to further improve the characteristics and service life of the pump.

2. Because the raw material of water pump seal is cemented carbide cutter and fluorine rubber mechanical seal, the stability of pump operation and the temperature of transported substances can be improved.

3. Part of the overcurrent of the vertical multistage centrifugal pump is made of stainless steel plate stamping die by electric welding, which makes the pump applicable to slightly corrosive substances.

4. The overall structure is compact, small, light, low noise, remarkable effect of environmental protection and energy saving, and convenient maintenance.

5. The inlet pipe and outlet of the vertical multistage centrifugal pump are located at the same horizontal line of the pump base and can be used in the pipeline immediately.

6. By selecting standard motors, customers can easily configure motors according to their needs.

7. Intelligent protection devices can be configured according to customers' needs to carry out reasonable maintenance on pump dry running, phase failure, load, etc.

The causes of vibration of vertical multistage centrifugal pump are as follows:

1. The vibration caused by the poor centrifugal pump scheme: the stiffness of the centrifugal pump scheme is not enough, the hydraulic power generation scheme of the centrifugal impeller is not fully considered, the static balance of the centrifugal impeller is not strictly required, the overall planning of the bearing with seat is not safe, and the basic plate is not strong and reliable.

2. Vibration caused by low production and manufacturing quality of vertical multistage centrifugal pump: the parallelism deviation of all rotating components in the production and manufacturing of centrifugal pump, and the unsmooth production and manufacturing quality of centrifugal impeller and pump shaft make the centrifugal pump vibrate.

3. Vibration caused by confusion of centrifugal pump machinery and equipment: for example, when TSWA multi-stage centrifugal pump machinery and equipment, the basic plate is not leveled and aligned on the ground, the pump shaft and motor shaft do not meet the needs of parallelism, the pipeline configuration is unscientific, the pipeline produces in-situ stress deformation, and the basic anchor bolts are not firm, resulting in pump vibration.

4. The vibration caused by improper operation of vertical multistage centrifugal pump is applied. The centrifugal pump with too high speed rotation is selected in the application, the actual operation is poor, the total flow is small, the sealing of the pump is poor, and the query of the running state of the pump is not tight, which will lead to the vibration of the centrifugal pump.