汽轮机低压缸膨胀受阻导致的振动异常原因分析及处理  

Cause Analysis and Treatment of Turbine Unit Vibration by Poor Expansion of Low Pressure Cylinder

作　　者：张伟江 唐广通 张营 高翔 李浩 ZHANG Wei-jiang;TANG Guang-tong;ZHANG Ying;GAO Xiang;LI Hao(State Grid Hebei Energy Technology Service Co.,Ltd.,Shijiazhuang 050021,China)

机构地区：[1]国网河北能源技术服务有限公司,石家庄050021

出　　处：《汽轮机技术》2023年第2期147-148,156,共3页Turbine Technology

摘　　要：针对某330MW汽轮机大修后低压转子振动异常故障,根据低压缸结构,通过分析轴承振动故障特征,诊断出振动异常的原因是低压缸发生膨胀受阻、缸体变形故障。通过对低压转子进行精密动平衡,减小了转子激振力,消除了振动异常故障。Aimed at theabnormal vibration of low-pressure rotors ofa 330MW steam turbine unit after overhaul,According to low-pressurecylinder structure,the characteristics of vibration are analyzed.The diagnostic conclusion of the abnormal vibration was due topoorexpansion and deformed of the low-pressure cylinder.Through dynamic balance test of low-pressure rotor,reduced the exciting force,the vibration abnormality was eliminated.

关 键 词：轴承振动 胀差 膨胀受阻 油膜刚度 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]