摘要为了加强对关键设备的管理及预测维修，需要大力开展设备的状态监测及故障分析工作，特别是在线状态监测工作。机组作为整个系统的重要部分，其运作状况显著影响系统的运作周期与能源损耗，运行顺利，不只可以节约电力，减少资源损耗，此外还可以确保所有机组的顺利运作，进而保证设施的正常生产。本文烟机在线状态监管和问题诊断技术的应用研究作为切入点，通过在重油催化装置的烟气轮机和众多规模庞大的机组在线状态监测的应用，全面分析烟气轮机的重要问题：转子不对中、不平衡、轴弯、油膜涡动、转子碰摩、轴裂纹等，分别从故障危害性、故障原因分析以及特性分析角度进行分析。通过现场的在线监测系统结合实际故障案例得出了不对中、不平衡、摩擦以及油膜涡动的故障特征，故障原因及解决措施，深入研究了各种故障的特征图谱。总结了烟气轮机故障诊断中常见的分析方法：时域诊断法、传统谱分析法、轴心轨迹分析法。通过对故障的分析，结合停机修理的结果与分析研究，最终推断出各种类型的数据和图谱所对应的不同故障类型，对于烟机转子及一、二级静叶密封结构进行了改进，降低了设备的故障率，机组实现了长周期平稳运行，对关键设备进行预知性维修，最终得到了满意的效果，取得可观的经济效益和社会效益。关键词：烟气轮机；在线监测；故障诊断；诊断技术应用Studyontheapplicationofon-linemonitoringandfaultdiagnosistechnologyofgasexpanderABSTRACTInordertostrengthenthemanagementandforecastmaintenanceofkeyequipment,itisnecessarytocarryoutthestatemonitoringandfaultanalysisofequipment,especiallytheon-lineconditionmonitoring.Unitasakeyequipmentoftheentiredevice,itsoperationconditionsdirectlyaffecttheunitrunningcycleandenergyconsumptionlevel,runwell,notonlycansavealotofpower,reducetheenergyconsumptionofthedevicelevel,butalsotoensurethesafeoperationoftheunit,toensurethesafetyoftheplantproduction.Inthispaper,theapplicationoftheon-linestatemonitoringandfaultdiagnosistechnologyofthecigarettemachineisusedasthebreakthroughpoint.Throughtheapplicationoftheon-linestatemonitoringonthefluegasturbineandthelargeunitsoftheheavyoilcatalyticunit,themainfaultformsofthefluegasturbinearestudiedsystematically,includingthemisalignment,unbalanceandaxisbendingoftherotorofthefluegasturbine.Oilwhirl,rotorrubbing,shaftcrack,etc.,areanalyzedfromthepointofviewoffaultharmfulness,failurecauseanalysisandcharacteristicanalysis.Throughtheon-linemonitoringsystemcombinedwiththeactualfailurecases,thefaultfeatures,thecausesofthefailureandthesolutionoftheoilfilmvorticityareobtained,andthecharacteristicsofvariousfaultsarestudiedindepth.Thecommonmethodsforfaultdiagnosisoffluegasturbinearesummarized:timedomaindiagnosis,traditionalspectrumanalysisandaxlecentertrajectoryanalysis.Throughtheanalysisofthefaultandtheanalysisandanalysisoftheresultandanalysisoftheshutdownrepair,thedifferenttypesoffaulttypescorrespondingtovarioustypesofdataandatlasareconcluded.Thestructureofthemachinerotorandtheoneortwostagestaticsealstructureisimproved,andthefailurerateoftheequipmentisreduced.Theunitrealizesthelongperiodandsmoothoperation,andthekeyisthekey.Thepredictivemaintenanceoftheequipmenthasachievedsatisfactoryresultsandachievedconsiderableeconomicandsocialbenefits.KeyWords：Gasexpander;Onlinemonitoring;Faultdiagnosis;Diagnostictechnologyapplication目录工程硕士学位论文独创性声明........................................................................................I工程硕士学位论文版权使用授权书................................................................................I摘要......................................................
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