With the rapid advancement of industrial development, multistage centrifugal pumps are increasingly widely used in industrial production. However, some users have found that leakage often occurs at the shaft seal of multi-stage centrifugal pumps during use, which seriously affects the normal operation and working efficiency of the equipment. Changsha Zoomlian Pump Industry, a professional pump manufacturer with over 30 years of experience in producing multi-stage centrifugal pumps, has rich experience in the main causes and solutions of leakage at the shaft seal of multi-stage centrifugal pumps. This article will provide a detailed analysis of this issue.
The main reasons for water leakage at the shaft seal of a multistage centrifugal pump are as follows:
1、 Damaged shaft seal: The shaft seal is an important component of a multistage centrifugal pump. It includes water seals and oil seals and is responsible for preventing the leakage of the medium inside the pump. However, due to long-term operation and use, the shaft seal may be damaged due to wear and aging, resulting in leakage.
2、 Improper selection of pump body material: Choosing the right pump body material is crucial for preventing leakage at the shaft seal. If the material of the pump body is not strong enough, it is prone to deformation and corrosion, which can lead to leakage at the shaft seal.
3、 Poor lubrication: Appropriate lubrication should be maintained at the shaft seal to reduce friction and wear. Insufficient lubrication or substandard lubricating oil quality can increase friction at the shaft seal, leading to leakage problems.
4、 The motor or diesel engine driving the multistage centrifugal pump has an unmatched speed. We once encountered a situation where the diesel engine speed was set too high, resulting in severe water leakage at the shaft seal of the multistage centrifugal pump.
Second, we will propose some solutions to the above problems:
1、Regular inspection and replacement of shaft seals: Inspect the shaft seals in a timely manner. When damage or wear is found, replace them promptly to prevent water leakage at the shaft seal. Additionally, choose reliable shaft seal products to increase their service life.
2、 Select appropriate pump body material: When choosing a multistage centrifugal pump, the appropriate pump body material should be selected based on factors such as the nature and temperature of the medium to avoid leakage at the shaft seal due to insufficient material strength.
3、 Strengthen lubrication management: Regularly inspect the lubrication system to ensure the quality of lubricating oil is up to standard, and replace or add lubricating oil as needed. Reasonable lubrication measures can reduce friction at the shaft seal and lower the risk of water leakage.
4、 Adjust the speed of the prime mover according to the speed of the multistage centrifugal pump to ensure it meets the requirements of the pump.
To sum up, the reasons for water leakage at the shaft seal of a multistage centrifugal pump may include damaged shaft seals, improper selection of pump body materials, poor lubrication, and excessive speed of the prime mover, among others. To address this issue, we can take a series of measures, such as regular inspection and replacement of shaft seals, selection of appropriate pump body materials, and enhanced lubrication management. Only in this way can we ensure the normal operation of the multistage centrifugal pump, improve work efficiency, and guarantee the smooth progress of production.