Analysis of the Causes of Mechanical Seals Leakage in Centrifugal Pumps

Pumps Asia] pump seal mainly in two categories: one for the static seal, one for the dynamic seal. Next Xiaobian introduce you to the cause of the mechanical seal leaks centrifugal pump. Centrifugal pump mechanical seal leakage causes analysis Centrifugal pump mechanical seal leakage reasons ⑴, end flatness is not up to the standard or scratched the surface; ⑵, the medium is not mixed with granular impurities, the centrifugal pump is running, the medium is in High-speed movement, the end surface of the plan. ⑶, gland force deformation, uneven pre-tightening force, resulting in seal damage; ⑷, the media meet the condensation of frozen spring, resulting in seal damage; ⑸, the actual output of the centrifugal pump smaller, so a lot of medium in the pump Internal circulation, heat accumulation, causing gasification of the medium, leading to seal failure; ⑹, ring material selection error, the choice of hard alloy, engineering ceramics, graphite and other brittle material sealing ring, sometimes there will be radial cracks on the end face, causing rapid wear and tear parts ; ⑺, Centrifugal pump due to taking the time, cavitation lead to a sharp increase in pressure within the pump, resulting in seal damage; ⑻, Centrifugal pump has not been used for a long time, re-activation and no manual operation of the impeller may be damaged due to adhesions seal; Too tight, resulting in rapid wear sealing surface failure, but also to increase power consumption. ⑽, moving ring seal is too tight will make the spring spring damaged due to fatigue, but also will speed up the wear and tear between the ring and the sleeve, the seal failure. ⑾, transmission parts due to poor coaxiality, running during the friction due to shaking the end face, resulting in end vaporization, overheating wear. ⑿, centrifugal pump idle or seal off the water pipe, the sealing surface is dry grinding state, so that the seal damage. ⒀, Centrifugal pump installation or maintenance, installation screws tighten the seal resulting failure. ⒁, sealing the end face due to overheating and deformation, the formation of many dents, resulting in serious wear and tear to damage the surface of the seal failure. ⒂, high temperature caused seal parts aging, cracking and deformation, the sealing end of the lack of closure force leakage, resulting in loss of sealing performance. Corrosive damage ⒃, Seal components are corrosive medium erosion for a long time, leading to seal damage. (Editor: Li Juan QQ:) Recommended reading: Acting purchasing the top ten brands of centrifugal pumps

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