Mechanical seal: the drawbacks of the slurry pump packing seal device-

Mechanical seal: the drawbacks of the slurry pump packing seal device

　2016-12-19　　

The traditional slurry pump shaft seal is mainly packing seal. The packing has rough surface, high friction coefficient, and leakage. In addition, the lubricant that has been immersed in it is easy to lose after a long time. Oil-impregnated asbestos packing will become very hard after long-term soaking in water, and because of the large expansion coefficient, the friction force is relatively large. In production, there is often such a situation: the newly repaired equipment, the shaft seal is in good condition when it starts to run, but after a short time, the leakage will continue to increase, and the work of adjusting the gland and replacing the packing is gradually frequent, and there is less than one operation. During the cycle, the shaft sleeve is worn into a vase-like shape. In severe cases, the shaft sleeve will wear off, and the packing behind the water seal ring that cannot be replaced is rotted and cannot play a sealing role.

Disadvantages of packing seals: ①The packing is in direct contact with the shaft and rotates relative to each other, causing wear of the shaft and sleeve. Therefore, the sleeve must be replaced regularly or irregularly. ②In order to make the packing between the shaft or sleeve The generated frictional heat is dissipated in time, and the packing seal must maintain a certain amount of leakage, and it is not easy to control. ③The friction between the packing and the shaft or sleeve causes the effective power of the motor to decrease and consumes electric energy, sometimes the proportion is 5%-10 ％~④ Packing seal shaft seal structure, a large amount of material leaks when running and stopping.　　205.html,

Common damage parts of mechanical seals Three 　　 mechanical seals are also called end seals