超临界空冷660MW汽轮机组不稳定振动原因分析与处理

摘要

针对某厂一台超临界空冷660MW汽轮机组高中压转子过临界振动逐渐爬升的问题,详细介绍了振动特征,确定了造成振动异常的原因是转子存在较大残余内应力,应力释放使得高中压转子发生永久性弯曲,对转子采取切削加工和高速动平衡的处理方案,消除了转子弯曲和异常振动.%To solve unstable vibration of HP/EP rotor of one supercritical air-cooled 660MW turbine in one power plant, the vibration characteristics are detailedly introduced. It' s found out that the cause of abnormal vibration is the more residual stress existing in the rotor and the cause of the HP/IP rotor' s permanent bending is thejrelease of stress. By taking the techniques of machinery cutting and high-speed dynamic balancing,the rotor' s permanent bending and abnormal vibration are eliminated finally.