带有SSS离合器汽轮发电机组轴系振动分析与处理  

Analysis and Treatment of the Shafting Vibration of Steam Turbine Generator Set with SSS Clutch

作　　者：宋亚军 司派友 郝向中 刘双白 SONG Ya-jun;SI Pai-you;HAO Xiang-zhong;LIU Shuang-bai(State Grid Jjibei Electric Power Co.Ltd.Electric Power Research Institute(North China Electric Power Research Institute Co.,Ltd.),Bejing,China,Post Code:100045)

机构地区：[1]国网冀北电力有限公司电力科学研究院(华北电力科学研究院有限责任公司),北京100045

出　　处：《热能动力工程》2022年第7期171-176,共6页Journal of Engineering for Thermal Energy and Power

摘　　要：针对某厂带有SSS离合器的300 MW级“凝汽-抽汽-背压”(NCB)式汽轮机纯凝运行模式下的轴系振动故障,进行了振动矢量计算、轴瓦温度分析和可倾瓦工作原理分析。计算与分析发现,振动是由高中压转子残余不平衡量、轴瓦载荷较轻、轴瓦瓦块调节性能差等多因素导致。提出提高轴瓦载荷、更换轴瓦瓦块并进行现场轴系动平衡的振动处理方案。运行结果表明:与振动处理前相比,高中压转子高压排汽侧支撑瓦的振动波动现象消失;在汽轮机空负荷工况下,高中压转子高压排汽侧支撑瓦X向通频振动由118μm降低至20μm。For the shafting vibration fault problem of the 300 MW condensing-extraction-back pressure(NCB)steam turbine with SSS clutch in a power plant in the mode of pure condensation,the vibration vector calculation,bearing shell temperature analysis and working principle analysis of the tilting pad were carried out respectively.Through the calculation and analysis,it is found that the vibration is caused by many factors,such as the residual imbalance of high and intermedium-pressure rotors,low bearing shell load,poor adjustment performance of bearing shell and so on.The vibration treatment scheme is proposed to enhance the bearing shell load,replace the bearing shell and perform the on-site dynamic balancing of the shafting.The operation result shows that compared with that one before vibration treatment,the vibration wave phenomenon of bearing shell on the side of HP steam exhaust of high and intermedium-pressure rotor disappears.Under the working condition of empty load of steam turbine,its direct vibration frequency in X direction is reduced from 118μm to 20μm.

关 键 词：SSS离合器 汽轮机轴系 振动 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]