超临界600MW机组检修后振动分析及处理  

Vibration Problem Study on an Overhauled 600 MW Supercritical Power Unit

作　　者：刘石 刘兴久 冯永新 刘永生 朱军 肖小清 王栋 

机构地区：[1]广东省电力工业局试验研究所,广州510600 [2]大唐潮州发电厂,潮州515723

出　　处：《振动．测试与诊断》2009年第4期406-409,共4页Journal of Vibration,Measurement & Diagnosis

基　　金：国家自然科学基金资助项目(编号:50475084);广东电网公司科研资助项目(编号:10083092)

摘　　要：对某国产超临界600MW汽轮发电机组的检修中,仅将2号低压缸进行了揭缸检查。修后启动中低压缸和发电机转子轴振动远大于修前,并超过报警值。振动分析表明,因机组轴系中心变化引起轴承载荷分配不一致导致了振动,并伴有碰磨故障。为了节省停机处理的时间,需在消除碰磨点后,通过现场全息动平衡方法将各瓦轴振动降至合格。After opening the No.2 low-pressure cylinder for overhauling a 600 MW supercritical unit,the vibrations of the cylinder and generator exceeded the values before overhauling and the alarm threshold value. The data analysis shows that the change of bearing-load distribution due to adjusting alignment is the main reason resulting in serious vibrations. In order to saving the repair time,the field holo-balancing is used for damping the vibrations of all bearings to standard limits.

关 键 词：振动 诊断 动平衡 全息谱 超临界机组 

分 类 号：TK267[动力工程及工程热物理—动力机械及工程] TH133[机械工程—机械制造及自动化]