特大型灯泡贯流式机组机电安装技术难点.docx

DOI:10.3880/j.issn.1006Ο7647.2010.01.017特大型灯泡贯流式机组机电安装技术难点黄中良1,赵显忠2,程云山3(1.广西方元电力股份有限公司,广西南宁530022;2.中国水利水电第七工程局机电安装分局,四川彭山620860;3.河海大学水利水电学院,江苏南京210098)摘要:通过桥巩水电站工程建设实践,分析特大型灯泡贯流式机组机电安装中的技术难点:①尾水管里衬、座环、导水机构的吊装变形和焊接变形以及浇筑混凝土引起的尾水管里衬、座环变形;②发电机组合轴承和水轮机径向导轴承间隙调整。介绍克服这些技术难点的工艺措施:缩短起吊部件滞空时间,加大起吊部件整体刚度是减少吊装变形的有效方法;改进焊接工艺是减少焊接变形的有效方法;分层、分步浇筑混凝土并注意浇筑速度是控制混凝土浇筑变形的有效方法。正确估计组合轴承和水轮机径向导轴承在静止和运行状态间隙变化量是调整轴承间隙的重要依据。该工艺措施为提高我国大型灯泡贯流机组的设计、制造和安装水平提供了宝贵的经验。关键词:灯泡贯流式水轮机;吊装变形;焊接变形;间隙调整中图分类号:TV547;TV734文献标识码:A文章编号:1006Ο7647(2010)01Ο0072Ο04Technicaldifficultiesofinstallationofmechanicalandelectricalequipmentforlargescalebulbtubularturbineunits//HUANGZhong2liang1,ZHAOXian2zhong2,CHENGYun2shan3(1.GuangxiFangyuanElectricPowerCo.,Ltd.,Nanning530022,China;2.MechanicalandElectricalErectionCompanyofChina7thWaterConservancyandHydropowerBureau,Pengshan620860,China;3.CollegeofWaterConservancyandHydropowerEngineering,HohaiUniversity,Nanjing210098,China)Abstract:BasedontheconstructionpracticesofQiaogongHydropowerStation,thetechnicaldifficultiesofinstallationofmechanicalandelectricalequipmentforlargescalebulbtubularturbineunitswereanalyzed:oneisthehoistingandweldingdeformationsofliningsofdrafttubes,stayringsandwaterguidemechanismandthedeformationofliningsofdrafttubesandstayringscausedbyconcretefilling;theotheristheadjustmentofthegapbetweenthecombinedbearingofgeneratorandtheradialguidebearingofwaterturbine.Thecorrespondingtechnologicalmeasureswereintroducedasfollows:toreducetheairstayingtimeandtostrengthenthewholerigidityofhoistingequipmentweretheeffectivemethodtoreducethehoistingdeformation;toimproveweldingprocedureswastheeffectivemethodtoreducetheweldingdeformation;tofillconcretestepbystepandlayerbylayerandtocontrolfillingspeedweretheeffectivewaytocontrolthedeformationinducedbyconcretefilling;tocorrectlyevaluatethegapvariationsbetweenthecombinedbearingofthegeneratorandtheradialguidebearingofthewaterturbineunderstaticandrunningconditionswastheimportantbasisfortheadjustmentofbearinggap.Thesolutiontot