Boiler fan is one of the important rotating mechanical equipment in thermal power plant. Abnormal vibration of bearing pedestal is a common fault of fan. The common causes of abnormal vibration of bearing pedestal are analyzed.Combined with several examples of abnormal vibration treatment on site

it is found that the problems can be diagnosed by means of external characteristic test

spectrum test and other test methods. After targeted treatment by taking measures such as dynamic balance counterweight and replacement of rolling bearing

the vibration displacement of bearing pedestal is less than50 μm. The vibration speed is less than 2.7 mm/s

which can effectively solve the problem of excessive vibration of boiler fan bearing pedestal. The proposed diagnosis method reduces the analysis and treatment time of vibration abnormalities

saves human and material resources

and has good effect

which ensures the energy-saving

safe and stable operation of power plant equipment

and has reference significance for the analysis and treatment of similar faults.