Maintenance measures of mine multistage centrifugal pump

1、 It is better to turn on the machine continuously for 8 ~ 16 hours every day Spare parts shall be provided for 24-hour continuous work, and they shall be replaced and repaired regularly. The replacement period is generally two to three months, and they shall be removed for overhaul when they expire. Production will not be affected, and non continuous work can be overhauled at any time

2、 When the specific energy of the conveying medium is greater than 1.2, an additional motor shall be equipped, otherwise the lift will be affected or the motor will be burnt out

3、 After using for a period of time, it is found that the leakage of the mechanical seal end face is caused by the wear of the carbonyl surface. The moving ring should be adjusted, and the two screws of stainless steel semicircle should be loosened. It is suitable for advancing forward. It is better to rotate the pump shaft by hand with ease and no resistance. Leakage will occur if it is loose, and the mechanical seal life will be affected if it is too tight and easy to wear

4、 Maintenance: remove the dirt in the pump casing, front and rear pump covers, impellers and mechanical seal components, and wash them away. If there is no damage, they can be used again. Check whether the two ends of the mechanical seal are damaged. If there is less wear or scratch on the end face of the moving ring, they can be used again after being polished on a flat plate with fine metallographic sand

5、 The disassembly sequence is as follows: remove the motor, bracket, bottom plate screws, remove the mechanical seal cover, allow the water nozzle to drain, loosen the moving ring snap ring bolts, the static ring pressure plate bolts, and the front and rear pump cover bolts, loosen the Feng Ding screws of the impeller shaft pull rod, screw them out for 3 ~ 5mm, knock the pull rod with a hammer, loosen the impeller, and then remove the pull rod, impeller and mechanical seal. When removing the mechanical seal, it should be done manually, not with metal tools, to avoid damage