Since putting unit no.2 at Guohua Zhunge’er Power Plant into operation

the original vibration of bearings no.2 and 3 in the shafting system reached about 75μm. The shaking of shaft neck in bearing no.1 was remarkable under condition of turning. At the end of year 2003

intermitent vibration also occurred frequently on bearings no.2 and 3 of unit no.2

max. peak value of vibration reached 134 μm. From middle ten days of August in 2003

the vibration of bearing no.7 concerning the generator in load augmentation has grater increasing tendency

max. value reaching 103 μm. affecting seriously normal and stable operation of the unit. Through comprehensive discussion and analysis of the on-line monitoring data for shaft vibration of the unit

as well as of problems left over during installation period in capital construction

corresponding repair scheme has been worked out. After implementation of said scheme in major repair at the begining of 2004

the above-mentioned problems have been fairly well solved.