600MW汽轮发电机不稳定振动故障诊断与处理
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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 600 MW unit, after fixed speed3000 r/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.
To diagnose the unsteady vibration occurred on a 600 MW unit, after fixed speed3000 r/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.
引文
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[14]寇胜利,尹赐君.元宝山电厂600MW发电机的振动[J].大电机技术,2003(6):20-25.
[15]寇胜利.发电机的现场动平衡[J].大电机技术,2006(1):14-22.
[16]王延博,李甲伟,杨青.600MW机组轴系振动故障诊断及处理[J].热力发电,2012,41(8):59-61.
[2]施维新.汽轮机工作转速下转轴碰摩振动及其诊断[J].中国电力,1994(6):28-34.
[3]何国安,王忠安,张卫军,等.1000MW汽轮机低压缸动静碰摩分析与处理[J].热力透平,2013,42(1):58-61.
[4]冯永新,刘石,邓小文.某660MW机组中低压转子振动故障原因分析与处理[J].汽轮机技术,2009,51(3):226-228.
[5]施维新,石静波.汽轮发电机组振动及事故[M].中国电力出版社,2008.
[6]施维新.柔性转子轴系平衡技术的发展[J].中国电力,2011,44(2):31-36.
[7]何国安,闵昌发,张学延,等.国产600MW汽轮发电机组轴系动平衡研究[J].动力工程学报2012,32(4):282-288.
[8]高庆水,刘石,张楚.汽轮机座缸式轴承振动影响因素研究[J].振动与冲击,2014,33(13):26-30.
[9]张学延.汽轮发电机组振动诊断[M].中国电力出版社.
[10]施维新.浮动和接触密封对轴系振动影响的测试及分析[J].中国电力,2004,37(2):11-16.
[11]李录平,晋风华,游力元,等.汽轮发电机组起动过程振动故障诊断与处理措施[J].热力发电,2006(11):37-41.
[12]刘石,刘兴久,冯永新,等.超临界600MW机组检修后振动分析及处理[J].振动、测试与诊断,2009,29(4):406-409.
[13]刘石,王飞,冯永新,等.引进型600MW发电机组轴系振动特征及处理[J].大电机技术,2009(5):4-12.
[14]寇胜利,尹赐君.元宝山电厂600MW发电机的振动[J].大电机技术,2003(6):20-25.
[15]寇胜利.发电机的现场动平衡[J].大电机技术,2006(1):14-22.
[16]王延博,李甲伟,杨青.600MW机组轴系振动故障诊断及处理[J].热力发电,2012,41(8):59-61.