1. The surface of the filler is rough, the coefficient of resistance is large, and there is leakage. Other smooth agents that have been immersed for a long time are easy to lose.
2. When the newly repaired equipment starts to operate, the shaft seal is in good condition, but it will not be long before the leakage amount is added from time to time, and the operation of adjusting the gland and exchanging the packing is also gradually frequent. The shaft sleeve has been worn into vase shape within one cycle of operation. When it is severe, the shaft sleeve will be worn out, and the packing that cannot be exchanged at the back of the water seal ring has rotted and cannot play a sealing role.
3. The packing is in direct contact with the shaft and is relatively rolling, which constitutes the wear of the shaft and the shaft sleeve. Therefore, it is necessary to exchange the shaft sleeve regularly or irregularly.
4. In order to dissipate the heat of conflict between packing and shaft or shaft sleeve in time, it is necessary to adhere to a certain amount of disclosure of packing seal, which is not easy to control.
5. The conflict between the packing and the shaft or the shaft sleeve constitutes the reduction of the useful power of the motor and the consumption of electric energy.