Mechanical seal is the main reason for pump leakage, but the mechanical seal itself is a more demanding precision parts, design, machining, assembly quality has high requirements. In the use of mechanical seals, the mechanical seal should be used to analyze the various factors that make the mechanical seal suitable for a variety of pump technical requirements and the use of media requirements and adequate lubrication conditions, so as to ensure the long-term reliable seal operation. 　　 Empty Can Palletizer,Empty Tin Cans Palletizer,Automatic Empty Can Palletizer,Automatic High Speed Palletizer Golden Eagle , https://www.tongyi-machinery.com
Mechanical seal also known as the end seal, which has a pair of perpendicular to the axis of rotation of the end surface, the end of the fluid pressure and compensate mechanical external elastic force, depending on the auxiliary seal with the other end to maintain fit and slide relative to prevent fluid leakage.
　　
First, the common leakage phenomenon
　　
The proportion of mechanical seal leakage accounted for more than 50% of all maintenance pump, mechanical seal the operation of a direct impact on the normal operation of the pump, are summarized as follows.
　　
Periodic leakage
　　
(1) The axial displacement of the pump rotor is large, the interference between the auxiliary seal and the shaft is large, and the moving ring can not move flexibly on the shaft. In the pump flip, moving, static ring wear, not to compensate for displacement.
　　
Countermeasures: When assembling the mechanical seal, the axial displacement of the shaft should be less than 0.1mm, and the interference between the auxiliary seal and the shaft should be moderate. While ensuring radial sealing, the moving ring can be flexibly moved on the shaft after assembly The ring pressing the spring can be free to bounce back).
　　
(2) insufficient lubricant on the sealing surface causes dry friction or nap sealing of the end surface.
　　
Countermeasures: oil chamber cavity lubricating oil height should be added to the moving, stationary ring sealing surface.
　　
(3) Rotor periodic vibration. The reason is the misalignment between the stator and the upper and lower end caps or imbalance between the impeller and the main shaft, cavitation or bearing damage (wear), which can shorten the seal life and create leakage.
　　
Countermeasures: According to the maintenance standards to correct the above problems.