Repair Techniques for Mechanical Seal Leakage of Slurry Pump

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• TIME : 2025-04-18

1. Confirm the cause of the leak

Before starting the repair, it is necessary to first confirm the specific cause of the leak. For example, it may be due to abnormal phenomena such as evacuation, cavitation, and pressure build-up during operation that cause significant axial forces, resulting in separation of the contact surfaces between the dynamic and static rings. Or it may be due to insufficient lubricating oil on the sealing surface causing dry friction or fraying of the sealing end face. Understanding the root cause of a leak is a prerequisite for developing an effective repair plan.

2. Check and replace seals

If the leakage is caused by damaged seals, such as damage to the dynamic and static ring friction pairs, then new seals need to be replaced. When replacing, it is important to choose the appropriate friction pair material to adapt to different media.

3. Adjust the installation of mechanical seals

Sometimes, mechanical seal leakage may be caused by improper installation. For example, excessive compression during installation may cause severe wear on the friction pair end face, while insufficient compression may result in poor sealing. Therefore, during maintenance, it is necessary to check the installation of the mechanical seal and make appropriate adjustments.

4. Maintenance and upkeep

Regular maintenance and upkeep are also important measures to prevent mechanical seal leakage. For example, before starting the slurry pump, it is necessary to check whether the attached devices of the mechanical seal and the cooling and lubrication system are complete and unobstructed. In addition, it is necessary to regularly check the wear of mechanical seals and replace them in a timely manner.

5. Technological transformation

For some special slurry pumps, technical modifications may be required to achieve online maintenance of mechanical seals. For example, it may be necessary to modify the impeller fixing ring and positioning shaft sleeve between the machine seal shaft sleeve and the bearing bracket to provide sufficient maintenance space.

The above are some repair techniques for mechanical seal leakage of slurry pumps, hoping to be helpful to you.

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(Editor in charge: Slurry Pump https://www.fuyangpumps.com/)

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