汽轮机技术
汽輪機技術
기륜궤기술
TURBINE TECHNOLOGY
2014年
6期
467-468
,共2页
600 MW汽轮发电机组%振动%动平衡%差胀
600 MW汽輪髮電機組%振動%動平衡%差脹
600 MW기륜발전궤조%진동%동평형%차창
600MW turbo-generator set%vibration%dynamic balancing%differential expansion
某电厂600MW机组存在临界转速下高中压转子相对轴振过大、工作转速下高中压转子相对轴振偏高问题以及高中压缸胀差变化问题。通过分析实测振动数据,诊断高中压转子临界转速及工作转速下相对轴振偏大原因为转子存在严重的一阶质量不平衡,采用现场高速动平衡技术,使机组振动达到优良水平。此外,诊断高中压缸胀差变化的原因是传感器失效所致,现场检查验证了故障诊断的正确性。
某電廠600MW機組存在臨界轉速下高中壓轉子相對軸振過大、工作轉速下高中壓轉子相對軸振偏高問題以及高中壓缸脹差變化問題。通過分析實測振動數據,診斷高中壓轉子臨界轉速及工作轉速下相對軸振偏大原因為轉子存在嚴重的一階質量不平衡,採用現場高速動平衡技術,使機組振動達到優良水平。此外,診斷高中壓缸脹差變化的原因是傳感器失效所緻,現場檢查驗證瞭故障診斷的正確性。
모전엄600MW궤조존재림계전속하고중압전자상대축진과대、공작전속하고중압전자상대축진편고문제이급고중압항창차변화문제。통과분석실측진동수거,진단고중압전자림계전속급공작전속하상대축진편대원인위전자존재엄중적일계질량불평형,채용현장고속동평형기술,사궤조진동체도우량수평。차외,진단고중압항창차변화적원인시전감기실효소치,현장검사험증료고장진단적정학성。
The shaft vibration of HIP rotor for 600MW unit of one power plant has been seriously exceeded standard at critical speed and rated speed.Meanwhile,the differential expansion of high pressure cylinder was varying.By analyzing the vibration data,diagnosing the failure cause is that there is serious first-order mass imbalance.Through adopting field dynamic balancing method,the HIP rotor vibration has been controlled to a satisfied level.In addition,the reason that the differential expansion of high pressure cylinder changed was sensor invalid.Field inspection has verified the accuracy of fault diagnosis.