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What are the misunderstandings in the use of mechanical seals? Machinery Seal

What are the misunderstandings in the use of mechanical seals?

2021-08-30 10:20

Mechanical seal is a kind of accessory that is used more frequently now, but in the application process of the product, it is easy for some application errors to affect people's calibration, resulting in a decrease in application efficiency and a damaged environment. Next, we will introduce its application error.

1. The greater the spring compression, the better the sealing effect

In fact, it is not the case. Excessive compression of the spring can lead to rapid wear of the friction pair and instant burning. Excessive compression will cause the spring to lose its ability to adjust the end face of the moving ring, resulting in seal failure.

2. The tighter the sealing pattern of the moving ring, the better

In fact, tightness of the moving ring seal is harmful and not beneficial. One is to aggravate the wear between the sealing ring and the shaft sleeve and cause premature leakage; the other is to increase the resistance of the axial adjustment and movement of the moving ring, which cannot be adjusted in time when the working conditions change frequently; the third is that the spring is too fatigued and easily damaged; The fourth is to deform the moving ring sealing ring, which affects the sealing effect.

3. The tighter the static ring sealing ring, the better

The static ring sealing ring is basically in a static state, and the sealing effect will be better if it is tighter, but it is also harmful if it is too tight. One is that the static ring seal is caused by excessive deformation, which affects the effect of the mechanical seal; the other is that the material of the static ring is mostly graphite, which is generally brittle, and it is easy to cause cracks due to excessive force; the third is that it is difficult to install and disassemble, and it is easy to damage the static ring.

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