300MW汽轮发电机组轴系动平衡研究  

Dynamic Balance Research of Shaft System for 300MW Turbo-generator Set

作　　者：王凤良 李剑[2] 府冬明 

机构地区：[1]黑龙江省电力科学研究院 [2]哈尔滨电站设备成套设计研究所有限公司

出　　处：《电站系统工程》2014年第4期26-28,共3页Power System Engineering

摘　　要：针对目前在役的300 MW汽轮发电机组运行中存在的轴系振动问题,分析了振动现象、振动特征、振动机理及其原因,并对现场动平衡问题的处理方法进行了总结。结果表明:目前的300 MW汽轮机高中压转子由于结构不对称存在振型干扰问题,现场平衡时应考虑在内;部分机组低压转子轴承座振动超标的原因为采用坐缸式轴承座的支撑刚度弱,现场可以通过采用精细动平衡来消除;发电机转子的振动根据结构不同而呈现二阶振型和三阶振型,现场动平衡应根据实际情况对发电机转子及励磁机转子进行平衡。According to vibration problems occurring in operation of 300MW-turbo-generator sets, an analysis has been carded out on vibration phenomenon, feature, mechanism and the causes, while various countermeasures for on-site dynamic balancing summarized. Results show that vibration disturbance exits in 300MW turbine unit medium-pressure rotors due to asymmetric structures and should be taken into consideration in site dynamic balance; the abnormal vibration occurring in low-pressure rotor of some turbine units are caused by insufficient rigidity of supports for relevant beating seats, which may be handled by fine dynamic balance on site; the vibration on generator rotor presents two-order mode and three-order mode and the dynamic balance for generator and excitation rotor should be according to actual instance on site.

关 键 词：汽轮发电机组 300 MW 轴系 振动 动平衡 

分 类 号：TK268.1[动力工程及工程热物理—动力机械及工程]