(1) Before driving, it is necessary to check the condition and coordination of the equipment, the tightening of the fastening bolts, the lubrication of the bearings (if the lubricating oil is insufficient, it should be refilled, and if it deteriorates, it should be replaced), the leakage of the sealing device, fill the pump body with liquid, and close the outlet valve.
(2) When driving, always pay attention to and check the operation of the pump, regularly check the temperature changes of the bearings, whether there is noise and vibration, whether the motor is heating up (not exceeding 80 ℃), whether the motor load is normal, and the leakage of the sealing surface. If any problems are found, the machine should be stopped immediately for maintenance.
(3) Before stopping the machine, the outlet valve should be closed first, and then the machine should be stopped. If in winter, the water inside the pump and pipes should be drained after shutdown to avoid freezing the centrifugal pump.
(4) Regular maintenance. Generally, centrifugal pumps should be thoroughly inspected every 6-12 months (which can be combined with equipment overhaul). During maintenance, disassemble the pump and thoroughly clean the impeller, bearings, shaft and sleeve, water seal pipe, packing box, pump casing, etc.
After cleaning the bearings, if wear, cracks, looseness, or dents are found in the ball bearings, new bearings should be replaced. If they are intact, new lubricating oil should be replaced; If there is wear on the shaft and sleeve, they can be repaired by welding and then worn again; If the shaft is bent, it should be straightened; Impeller wear or corrosion can be repaired or replaced (after repair, a balance test must be conducted again); Replace the sealing letter with new packing. After regular maintenance and assembly, a new trial run is required.
(5) Conditions for emergency pump stop.
If there is a sudden strong vibration or clear metal friction sound inside the pump, the machine should be stopped immediately for maintenance.
