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ID:33606530
大小:1.52 MB
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时间:2019-02-27
《核主泵用流体动压型机械密封耦合模型与性能分析》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、第33卷第2期摩擦学学报Vol33No22013年3月TribologyMar,2013核主泵用流体动压型机械密封耦合模型与性能分析王小燕,孟祥铠,刘鑫,盛颂恩,彭旭东(浙江工业大学过程装备及其再制造教育部工程研究中心,浙江杭州310032)摘要:以某型核主泵用流体动压型机械密封为对象,考虑密封环组件的接触和密封端面的流固耦合作用,建立了密封组件三维多场耦合模型,结合有限差分法和有限单元法,采用数值迭代技术进行了耦合场的计算.研究了高压下密封端面变形的特点和规律,分析了密封压力对密封性能的影响作用.结果表明:密封环端面产生
2、径向收敛锥度和周向波度,高压侧密封深槽对密封端面周向波度的生成起重要作用,密封端面锥度的形成与密封环宏观结构密切相关.随密封压力的增大,密封端面收敛锥度和波度均增大,密封泄漏率增加,而端面摩擦系数减小.为在高压下形成较大的波度,建议将动压深槽加工在软质密封环端面上.关键词:核主泵;流体动压机械密封;有限元;密封性能;耦合模型中图分类号:TH117.3文献标志码:A文章编号:1004-0595(2013)02-0169-08CouplingModelandPerformanceAnalysisofHydrodynamicMec
3、hanicalSealforReactorCoolantPump,WANGXiao-yan,MENGXiang-kaiLIUXin,SHENGSong-en,PENGXu-dong((EngineeringResearchCenterofProcessEquipmentandItsRemanufacturingofministryofEducation,ZhejiangUniversityofTechnology,Hangzhou,310032,China)Abstract:Accordingtoatypeofservic
4、edhydrodynamicmechanicalsealinreactorcoolantpump,athree-dimensionalmulti-fieldcouplingmathematicmodelforsealassemblywasdeveloped,takingthecontactandfluid-solidcouplingbetweensealcomponentsintoconsideration.Combinedfinitedifferencemethodwithfiniteelementmethod,anume
5、ricaliterationmethodwasusedtosolvecouplingproblem.Thedeformationcharacteristicsofendfaceswerestudiedunderdifferenthighpressureconditions;meanwhile,theinfluencesofsealpressureonsealwereanalyzed.Resultsshowthatradialconvergenttaperandcircumferentialwaveswereformedons
6、ealendfaces,respectivelyduetoaffectionofsealringsmacro-structureandtheexistenceofdeephydropads.Whensealpressureincreased,boththeradialtaperandcircumferentialwaveonsealendfacesincreased;andanincreasingleakagerateandadecreasingfrictioncoefficientbetweensealfacesweres
7、hown.Inordertoformalargerwaveunderhighpressure,itissuggestedthatthedeephydropadsaremachinedonthesoftsealrings.Keywords:reactorcoolantpump,hydrodynamicmechanicalseal,finiteelement,sealperformance,couplingmodelReceived13August2012,revised26September2012,accepted5Dece
8、mber2012,availableonline28March2013.Correspondingauthor.E-mail:mengxk@zjut.edu.cn,Tel:+86-571-88320293.TheprojectwassupportbytheNationalNaturalS
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