Leakage of the mechanical seal is the dynamic and static ring plane wear. There are six aspects of the dynamic and static ring plane wear:
1.A tight installation.
Observation of mechanical sealing static ring plane, such as a severe burning phenomenon, flat black and deep traces, the sealing rubber hardens, loss of elasticity, this phenomenon is due to caused by the installation too tight. Treatment: adjust the installation height, impeller installation, with a screwdriver to pull out the spring, the spring has a strong tension, after the release of the reset, there is 2 - 4mm of the moving distance can be.
2. Install too loose.
Observation of machine closure dynamic and static ring plane, the surface have a very thin layer of scale, to wipe the surface, the basic non wear, which is the loss of flexibility and spring assembly caused by bad, or motor axial dynamic.
3. The water quality is poor.
Due to poor water quality, containing high hydrochloride content in small particles and medium, the formation of abrasive wear machine sealing plane or pulling the surface groove, ring groove, such phenomenon. Treatment: to improve the water pressure or media, the replacement of mechanical seals.
4. Dry operation caused by dry grinding damage.
This phenomenon is more common in type valve at the end of the installation form of inlet pressure, inlet air, pump cavity with air, starting the pump, mechanical seal friction high-speed operation and produces high temperature, unable to get cooling, check sealing machine, spring tension is normal, friction surface charred black, rubber hard cracking. Treatment: exhaust pipe and pump cavity air, the replacement of mechanical seals.
5. Cavitation. Cavitation is mainly produced in hot water pump.
The medium is water, the water temperature is too high to produce steam, steam pipe into the pump cavity height, this part of the steam can not be ruled out, resulting in running water, sealing machine dry abrasion failure, cavitation loading automatic exhaust valve, replacement of machine closure.
6. Assembly problem.
When installing the pump cover, it may not be installed flat, causing the shaft and the pump cover is not perpendicular to the static and dynamic plane can not be consistent, the boot time is not long, resulting in unilateral wear and water seepage. There may be movement in the ring when installed, will damage rubber parts, or static surface bumps ring. Treatment: removal of heavy equipment, check whether the pump cover.
