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May 11, 2022 View:

Rotary Lobe Pump Mechanical Seal Problems And Solutions

Mechanical seal is a very important part of the rot or pump, once a failure occurs, it will increase the chance of the entire mechanical seal failure. Today Ace has compiled a few possible problems and liberation methods for lobe pump mechanical seal, hope it will help you!

1、Leakage during static test of lobe pump installation

After the mechanical seal is installed and commissioned, the pump should be tested to observe the amount of leakage of the equipment. If there is a smaller leak, the cause is mostly the dynamic ring or static ring seal ring problems; if there is a relatively large amount of leakage, it may be the dynamic, static ring friction between the problem. When the pump seal leakage occurs, the first thing to do is to observe the amount of leakage of the pump, determine the general location, and then manually pan the car to observe.

2, lobe pump test run errors

After the pump has been tested at the above stage, the centrifugal force generated during operation due to high speed rotation will also inhibit the leakage of media. Therefore, the mechanical seal leakage during the trial run is basically due to the damage caused by the friction of the moving and static rings after the failure of the discharge inter-shaft and end cap seals. The main reasons for these phenomena are: the operation of the process of evacuation, cavitation, holding pressure, etc., thus causing a larger axial force, after leading to dynamic, static ring contact surface separation; excessive compression leads to friction surface abrasion is more serious; dynamic ring seal ring is too tight, the spring can not adjust the dynamic ring axial floating amount; static ring seal ring is too loose, when the dynamic ring axial floating, static ring from the static ring seat.

3, due to the corrosion of equipment caused by the mechanical seal failure of the lobe pump: the face of the seal joint corrosion occurred, resulting in the penetration and thus the phenomenon of pump leakage.

4, due to high temperature effect and lead to mechanical seal failure of the lobe pump: at the sealing surface due to long-term dry friction of equipment, cooling water suddenly interrupted, impurities into the sealing surface, evacuation, etc., will lead to radial cracking of the replacement surface; some auxiliary seals in the non-normal temperature, will lead to aging, cracking, after hardening and loss of elasticity. These same phenomena can lead to pump leaks.

The above is the lobe pump mechanical seal problems and solutions, to learn more about a lobe pump related knowledge please feel free to pay attention to our website, we will regularly share relevant knowledge about the lobe pump for everyone.