The centrifugal pump mechanical seal is the key consumables of the centrifugal pump. The long -term operation life will gradually become shorter. How to make the centrifugal pump mechanical sealing "extended life" must have a good maintenance skills for centrifugal pump mechanical sealing. So do you want to understand the six misunderstandings of centrifugal pump mechanical sealing and maintenance? The main manifestation in the following 6 aspects:
Centrifugal pump mechanical sealing and maintenance misunderstanding
1. The larger the compression of the spring, the better the sealing effect
In fact, the amount of spring compression is too large, which can cause the friction and subtle drama to wear and instantly burn; excessive compression causes the spring to lose the ability to regulate the end surface of the dynamic ring, resulting in a seal failure.
2. The tighter the dynamic ring seal, the better, the tightly sealing ring is too tight and harmful.
1. Exile the wear between the sealing ring and the axis cover, overly premature leakage;
2. Increasing the resistance of the axis and movement of the dynamic ring, it cannot be adjusted in a timely manner when the working conditions are frequent;
3. Spring over excessive fatigue is easy to damage;
4. Deformation of the dynamic ring sealing circle, affecting 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 relatively tight sealing effect will be better, but too tight is also harmful.
1. Caused the static ring seal due to excessive deformation and affect the sealing effect;
2. Most of the static ring materials are graphite, which is generally crispy, and excessive force is easily caused by cracking;
3. Difficulty installation and disassembly can easily damage the static ring.
4. Multi -level centrifugal pump leaf wheel lock mother
In the leakage of mechanical sealing, the leakage between the shaft and the axis (leakage between shafts) is more common. It is generally believed that the leakage of the shaft is that the impeller lock the mother is not locked. In fact, there are many factors that cause leakage between the shaft. The bit error, the contact surface is destroyed, there is a gap between the components on the shaft, and the long thread of the shaft head will cause leakage between the shaft. Excessive locks of the lock mother will only cause the shaft pad to fail early. On the contrary, moderate locking the mother, so that the cushion of the shaft always maintains a certain compression elasticity. During the operation, the lock mother will automatically lock in time, so that the between the shaft is always good Sealing state.
5. The new one is better than the old one
Relatively speaking, the effect of using the new mechanical sealing of the pump is better than the old, but the quality or material selection of the new machine seal is not at the time, and the size error will meet the sealing effect; Excessive wear is not replaced. Because the static ring is in a static state in the static ring for a long time, the polymer and impurities are deposited into one, and it plays a good sealing role.
6. Repairing and repairing is better than not to demolish
Once a mechanical seal leak occurs, it is anxious to disassemble. In fact, sometimes the seal is not damaged. Just adjust the working conditions or adjust the seal appropriately to eliminate the leak. This avoids both waste and can verify its own failure judgment ability, and accumulates maintenance experience to improve the quality of maintenance.
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