After-sales service staff in the process of customer maintenance, a considerable part of the problem is the leakage of equipment. Equipment leakage of a wide variety of phenomena, mainly machine seal leakage. This article hereby introduce the reasons for mechanical seal leakage and treatment methods. First, the mechanical seals at the first possibility of water leakage is the machine seal, static plane wear. The mechanical seal caused by static and dynamic wear flat plane for six reasons: First, the installation is too tight. Observe the static and dynamic ring plane of the mechanical seal. If there is serious burning phenomenon, the surface is black and deep, the seal rubber hardens and loses its elasticity. This phenomenon is caused by the tight installation. Approach: Adjust the installation height, after the impeller is installed, pull the spring with a screwdriver, the spring has a strong tension, release immediately after reset, 24MM of the moving distance can be. Second, the installation is too loose. Observer seal, static ring plane, the surface has a thin layer of scale, to wipe the surface of the basic wear and tear, which is caused by the loss of spring flexibility and poor assembly, or motor caused by the axial movement. Third, the water quality is poor with particles. Due to poor water quality, containing small particles and medium hydrochloride content is high, the formation of abrasive wear seal plane or surface of the resulting groove, ring groove and so on. Approach: improve water pressure or medium, replace the machine seal. Cause four, dry running damage caused by running water. This phenomenon is more common in the end of the valve installation form the entrance of negative pressure, air inlet pipe, the pump cavity air, the pump boot, the machine seal friction high speed operation produces high temperature, can not be cooled, check the machine seal, spring tension normal , The friction surface burns black, the rubber hardens and cracks. Approach: drain pipes and pump cavity air, replace the mechanical seal. Five reasons, cavitation. Cavitation is mainly caused by hot Water Pump. As the medium is hot water, the water temperature is too high to produce steam, the gas inside the pipe into the pump chamber height, this part of the gas can not be excluded, resulting in water running, machine seal dry failure, cavitation automatic loading Valve, replace the machine seal. Sixth, the assembly problem. When installing the pump cover, it may not be level, causing the shaft and the pump cover is not perpendicular to the plane caused by the movement can not match, boot time is not long, resulting in unilateral wear and seepage. It is also possible to install the static and dynamic ring, the rubber damage, or dynamic and static ring surface bumps. Approach: Remove the heavy equipment, check the pump cover is installed level. Second, the second possibility of mechanical seal leakage of water mechanical seal failure. Mechanical sealant failure reasons: the old pieces of rubber rubber aging, deformation, mainly in the hot water pump, deformation. Mechanical sealant failure phenomenon is the phenomenon of water temperature is too high, the media dissolved rubber. From the appearance of rubber surface loose, rough, loss of elasticity, so that rubber failure. Approach: replace the appropriate rubber material. Third, the mechanical seals at the third possibility of water leakage is caused by the pump chamber static ring. The main reason is the large error in the processing of static hole indoor hole, rough surface. The phenomenon of performance from the axial water, there is a gap between the stationary ring and the bore, or rough bore, static ring with the turn, rubber wear. Approach: replace the pump cover. Or wrap with static belt outer ring, or add sealant for emergency treatment. Fourth, the mechanical seals at the fourth possibility of water leakage is poor machining precision motor shaft, small size, roughness and journal corrosion. The main reason is the motor shaft (ring around) processing size is small, or due to corrosive media corrosive pump shaft, and due to prolonged deactivation, water as a medium, the steel shaft and casting impeller, pump electrode potential difference , The formation of the original battery reaction, resulting in journal corrosion. The phenomenon of corrosion is the surface of the spotted spots. Approach: Rusty surface with sandpaper polishing, with raw material wound, into the moving ring for emergency treatment, the best way is to change the shaft, or shaft set after the restoration of the original shaft size.
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