摘要
针对某台600MW汽轮发电机组定速3000r/min后出现的不稳定振动进行分析诊断,确定造成不稳定振动的原因是低压轴端汽封动静碰摩,轴瓦支撑刚度低,密封瓦碰摩,滑环轴存在不平衡质量及碳刷碰摩等,采取了提高发电机密封油油温,滑环轴热态动平衡等处理措施,消除了不稳定振动。
To diagnose the unsteady vibration occurred on a 600MW unit,after fixed speed 3000r/min.It's found out that the cause of the unsteady vibration of the turbine is impact-rubbing between the gland seal of LP shaft and rotating shaft,low support dynamic stiffness of bearing,impact-rubbing of sealing pad,unbalance of slip ring shaft,and impact-rubbing of carbon brush etc.By increasing the tempreture of sealing oil of generator,thermal dynamic balance of slip ring shaft etc.the unsteady vibration of the turbine is eliminated.
作者
牟法海
吕冬梅
曹伟
张立
王博磊
MU Fahai;LV Dongmei;CAO Wei;ZHANG Li;WANG Bolei(HEBEI Ji-Yan Energy and Technology Research Institute Co.,Ltd.,Shijiazhuang 050051,China;HCIG Guo-Rong Energy Service Co.,Ltd.,Shijiazhuang 050051,China)
出处
《大电机技术》
2019年第3期38-42,共5页
Large Electric Machine and Hydraulic Turbine
关键词
汽轮发电机组
不稳定振动
密封瓦碰摩
碳刷碰摩
热态动平衡
turbo-generator
unsteady vibration
impact-rubbing of sealing pad
impact-rubbing of carbon brush
thermal dynamic balance
