汽轮发电机组轴系周期性振动分析及处理  

Analysis and Treatment on Cyclical Vibration of Steam Turbine

作　　者：王乃斌 王俊山 徐威 冯永雷 

机构地区：[1]中电华创电力技术研究有限公司,上海200086 [2]中电神头发电有限责任公司,朔州036000

出　　处：《汽轮机技术》2017年第4期313-315,共3页Turbine Technology

摘　　要：针对某电厂2号机组长期存在发电机转子6瓦轴振周期性振动超标的问题,分析了机组振动异常的原因和机理,阐明了碳刷与转轴的碰摩是引起周期性振动的主要原因,经过对集电环刷架间隙进行调整,消除了机组在正常运行情况下的异常振动,通过高速动平衡降低了由于转子热应力变化导致6瓦振动爬升趋势。Cyclical vibration has been a long-standing problem in generator rotor No. 6 bearing of a power plant unit No. 2. Analyze the mechanism of abnormal vibration. It is concluded that the rub between the carbon brush and shaft is the main reason for the unstable vibration. After adjusting the clearance of collecting ring brush holder, eliminate the abnormal vibration under normal operating conditions. By the high speed dynamic balance, reduce the shaft vibration due to the thermal stress change of No. 6 bearing.

关 键 词：汽轮发电机组 周期性振动 摩擦 

分 类 号：TK268.1[动力工程及工程热物理—动力机械及工程]