XI Wenkui, HE Guoan, ZHANG Gang, et al. Shaft vibration in a 200MW unit:reason analysis and countermeasures[J]. Thermal power generation, 2016, 45(9): 81-85.
XI Wenkui, HE Guoan, ZHANG Gang, et al. Shaft vibration in a 200MW unit:reason analysis and countermeasures[J]. Thermal power generation, 2016, 45(9): 81-85.DOI:
During start up and operation process of a newly built air cooling 200 MW turbo-generator
serious vibration faults occurred
such as No.2bearing shaft vibration peak with turbine speed ranging from 2835r/min to 2 865r/min
No.1to No.3 shaft bearing vibration climbing
and No.3to No.5shaft bearing vibration exceeded the standard.In order to solve this problem
the vibration data in site were measured and the record of operation and examination was analyzed.It can be found that the fault was caused by the sensor bracket resonance
poor expansion of the cylinder and the rotor quality imbalance.Through bracket reinforcement
sliding key system repairing and high-speed dynamic balance
the vibration of the unit shaft system can be controlled at a level of excellence.