1000MW机组轴瓦异常振动问题的分析与解决

Analysis and Solution of Bush Vibration Anomalies in One 1000 MW Steam Turbine Unit

针对某电厂1000 MW机组投产后出现的1号轴瓦振动异常问题,机组在运期间根据轴瓦异常振动情况进行了初步分析,停运后结合揭瓦检查的情况,确认了轴承安装缺陷、轴承承载较轻稳定性裕度不足、高压转子动静碰摩等3个方面因素是引起轴瓦振动异常的主要原因。针对发现问题采取相应措施,措施实施后机组1号轴瓦的异常振动问题得到解决。

Vibration anomalies occurred on No. 1 bearing bush of one 1000 MW power unit after the unit was put into operation. Preliminary analysis, carried out during operation periods and combined with the bearing bush inspection after the unit was shut down, confirmed that the defects of bearing installation, the lack of bearing stability and the static and dynamic components rubbing of the high-pressure rotor were the main reasons for the bush vibration anomalies. Through analyzing the problems, corresponding solution measures were proposed. After implememing these measures, the bush vibration anomalies on No. 1 bearing bush were finally solved.