Troubleshooting of pump centrifugal impeller and pump mechanical seal 1、 Troubleshooting of centrifugal impeller of water pump Most of the leaves of the centrifugal impeller of the water pump are damaged due to cavitation or suction of solid matter, metal material residue, etc. Sun ring (also known as seal) The wear of the ring is generally caused by the unreasonable movement of the channeling projectile in the installation process, and the loose back cap of the centrifugal impeller will also lead to the wear of the mouth ring Wear and tear. If the mouth ring is seriously worn, the centrifugal impeller needs to be replaced; If the wear of the mouth ring is relatively light, it can be repaired. There are various self suction pumps and sewage pumps using centrifugal impellers. 2、 Fault resolution of balancer If the equalizing disc and equalizing ring are worn too much (generally more than 2mm) or uneven concave convex, weld or grind the concave on the pump body first A 3mm thick Teflon washer is added at the fusion surface between the equalizing ring and the pump body. In that way, the problem after welding repair is solved Uneven surface caused by manual grinding,. The raw material of gasket is hard and soft. If the wear is too much, replace the equalizing ring and equalizing disc with a new one. 3、 Troubleshooting of mechanical seal of water pump The mechanical seal of the water pump has a pair of inner holes vertically bisecting the rotation axis. The inner hole has the effect of liquid working pressure and compensating the external elasticity of mechanical equipment Under this condition, it depends on the coordination of the auxiliary seal to maintain the fit with the other end and slide relatively, so as to avoid liquid leakage. Mechanical seal leakage The percentage of leakage accounts for more than 50% of the leakage of all maintenance pumps. The operation of mechanical seal can directly endanger the normal operation of the pump. The leakage of the mechanical seal will cause the radial movement of the pump motor rotor, the large throwing movement, the expansion of the interference between the auxiliary seal and the shaft, and the moving ring can not work on the shaft Live move. When installing the mechanical seal, the glaze movement of the shaft should be less than 0.5% IMM, the interference between the auxiliary seal and the shaft shall be Moderately, while ensuring the axial seal, it is also necessary to ensure that the moving ring can move flexibly on the shaft after installation (press the moving ring towards the torsion spring) Can bounce back at will). If you want to prevent the inconvenience of replacing mechanical seals, you can choose unsealed pump products, such as magnetic pumps or acid-base resistant magnetic pumps.