Troubleshooting vibration faults in boiler feedwater pump systems. Bearing system faults in boiler feedwater pumps can cause insufficient flow, pump body heating, and poor operation. One of the reasons for these faults is due to insufficient lubrication or impurities in the lubricating oil, and the vibration of the unit can also increase the number of bearing system faults. Excessive vibration of the feedwater pump system can have a significant impact on the safety of the entire unit, seriously endangering the safe and stable operation of the unit. Moreover, excessive vibration has a significant impact on the unit, its foundation, and other aspects. The main reasons for excessive vibration of the unit are deformation of the pump shaft or motor rotor shaft, damage to bearings, and loosening of the base fixing bolts. After excessive vibration of the unit occurs, the first step is to check whether the fixed base bolts are firm, and then check whether there are overheating and poor rotation in the bearing parts. If the above situation occurs, it can be determined that the cause of excessive vibration is bearing damage. If the vibration of the unit still persists after excluding other reasons, it can be considered that excessive vibration is caused by deformation of the pump shaft or motor rotor shaft. The deformation of the pump shaft or motor rotor shaft is mostly temporary, which is caused by local overheating due to damage to the unit bearings. The temperature equilibrium deformation can disappear after shutdown.

The daily maintenance of modern boiler feedwater pumps, with fault prevention as the main focus, must be aimed at fault prevention and establish a scientific maintenance system and system to guide the daily maintenance work of feedwater pumps. Establish a record of component failures and replacements for the water supply pump, with a detailed understanding of the time of damage to each component, in order to facilitate timely replacement before the component reaches its service life in the future, and to avoid damage to the unit if components (such as bearings) are not detected in a timely manner. In addition, it is necessary to strengthen the maintenance of the lubrication system of the water supply pump, regularly check the amount of lubricating oil, lubricate the components in a timely manner, and avoid situations such as dry grinding. Before adding lubricating oil, pay attention to checking the oil quality and the cleanliness of the adding port to avoid introducing impurities and damaging the bearings during the adding process. During maintenance, attention should also be paid to the inspection and maintenance of the water supply pump system pipeline, timely plugging of leaks, frequent inspection of the rust proof coating on the outer side of the pipeline, and timely spraying of the coating peeling off areas to ensure the corrosion resistance of the pipeline. During maintenance, attention should also be paid to the inspection and maintenance of the water source treatment system of the feedwater pump.