FAULT DIAGNOSIS AND SOLUTION OF SINGLE MECHANICAL SEAL

In industrial production, single-end mechanical seal, as an important sealing device, is widely used in various rotating equipment, such as pumps, compressors, etc. However, during its operation, various failures may occur, affecting the normal operation and production efficiency of the equipment. Therefore, accurate troubleshooting and effective solutions are essential.

There are various common fault types of single-end mechanical seals. The wear of the sealing surface is relatively common, which is usually caused by the friction between the sealing surface and the particle impurities in the medium. This will reduce the sealing performance and cause leakage. In addition, overheating is also a common problem, which may be caused by poor lubrication, cooling system failure or excessive sealing surface pressure. Overheating will accelerate the aging and damage of the seals and further affect the sealing effect.

The aging and deformation of seals are also failures that cannot be ignored. Due to long-term erosion, temperature changes and pressure of the medium, the seal may lose its elasticity, crack or deform, resulting in the failure of the seal. In addition, improper installation may also cause failure. For example, if the installation is not in-alig, the compression is not suitable, etc., which will affect the normal work of the seal.

In order to accurately diagnose the failure of single-end mechanical seals, a variety of methods need to be used comprehensively. The first is to visually check the type of fault by observing the appearance of the sealing part, such as whether there are leakage marks, the wear and tear of the sealing surface, etc. Secondly, temperature monitoring is also an effective means. Temperature measuring instruments are used to detect the temperature of the sealing site. Excessive temperature may imply problems such as poor lubrication and overheating. Pressure detection can help determine whether the pressure on the sealing surface is normal, and abnormal pressure may lead to the failure of the seal.

It is also important for vibration monitoring. Abnormal vibration may mean the looseness of the sealed parts, the imbalance of the rotating parts and other problems. In addition, through the analysis of the medium, understanding the impurity content, composition changes, etc. can also provide clues for fault diagnosis.

For different faults, the corresponding solutions also have their own focus. For the wear of the sealing surface, it is necessary to replace the seriously worn seals in time, ensure the cleanliness of the medium, and reduce the wear of impurities on the sealing surface. If it is an overheating problem, check the lubrication and cooling system to ensure its normal operation, and optimize the sealing structure if necessary to reduce friction and heat.

For the aging and deformation of the seal, the new seal should be replaced and the high-quality materials suitable for the working environment should be selected. If the failure is caused by improper installation, the correct installation must be carried out again and operate in strict accordance with the installation specifications to ensure the appropriate accuracy and compression.