汽轮机密封技术的应用和发展

:2004-12-27;:2005-07-04:(1955-),,,.:1001-2060(2005)05-0455-04,,,(,150036):,,,,,,:;;;:TK26:A1,,,,,,,,:;:,,1P3,,,,,,,,2,,,,,3540mPs,3000.20.6mm,0.50.6mm,3,,,,,,1.6mm,(0.8mm),(3.2mm),0.51.6mm,,0.200.40mm,20520059JOURNALOFENGINEERINGFORTHERMALENERGYANDPOWERVol.20,No.5Sep.,2005©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1;0.06mm,,,,,,,4,,50%:,;,(20%)100,,0.8mm45mm12mm0.5MPa,20%,1,(1(a)),(1(b)),,,,45,,,,,;,P,,,,:0.51mm1.27mm,,,,5:,,,,,,,,,,,,,,,,V,,,,,,,,,,6542005©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,;,,,,2080,,Brandon,19891990,GEGE,,,,,,,GE,,,,,,,,,,,,,,,:64,23,2634,,,,33,,,,,(),,,,1%2%,:,,;,6,,;;;,7545,:©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,,,,,,,,,,,:[1]K,S.[M].,.:,2002.[2]H.[M].:,1988.[3],,,.[J].,2004,19(5):5212525.[4].[M].:BrandonEn2gineeringInc,1998.[5]MACGREGORJP.Improvedturbineheatratewithretractablepackingrings[A].InternationalTurbomachineryCongress[C].LondonEngland:InternationalTurbo2machineryCongress,1989.1-22.[6]WESCOTTJ,BRANDONRE,Sustainedturbineefficiencyusingvariableclearancepacking[A].EPRIHeatRateImprove2mentConference[C].RichmondVirgin2ia:EPRIHeatRateImprovementConfer2ence,1988.1-10.[7]MILTONJ,SNOWDONT.Theapplictionofahighaccuracydatacollectionsystem[A].EPRIHeatRateImprovementConference[C].RichmondVirginia:EPRIHeatRateImprovementConference,1988.1-6.[8]MEYERC,LOWRIEJ.Theleakagethroughstraightandslantlabyrinthandho2neycombseals[A].ASMEWinterMeet2ing[C].NewYork:ASMEWinterMeeting,1974.23-30.ASMEJournalofEngineeringforGasTurbinesandPower200410,,,,,,,,,53%,13%,25%,,,,,,,()8542005©1995-2005TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.=DevelopmentofHeatExchangeTechnologyfromMacro2sizedHeatEx2changeUnitstoMiniaturizedOnes[,]PZHOUGuo2yan,TUShan2dong(Mechanical&PowerEngineeringInsti2tuteundertheEastChinaUniversityofScience&Technology,Shanghai,China,PostCode:200237)PPJournalofEngi2neeringforThermalEnergy&Power.-2005,20(5).-447454Onthebasisofanalyzingtheconstructionfeaturesoftraditionalheatexchangersaspecificanalysiswasconductedoftheconstruction,performanceandapplicationsofnowcommonlyusedcompactheatexchangersalongwithanexpositionoftheirdevelopmentandpotentialuseinmicro2sizedchemico2mechanicalsystems.Withanammoniacoolerservingasanexamplethedesignofaplate2finheatexchangerandanotherkindofhigh2efficiencyminiaturizedheatexchangeunit,theso2calledheat2pipeheatexchanger,wasrespectivelycarriedout.Itcanbeshownthattheplate2finheatexchangerfea2tureshigherheat2exchangeefficiencyandacompactstructure.Thisalsoinacomprehensivewayindicatestheinevitabledevelopmenttrendofheatexchangetechnologyfrommacro2sizedunitstocompactandminiaturizedones.Thewidepros2pectsoftheapplicationofminiaturizedheatexchangedevicesarespecificallyanalyzedbycitingasexamplessuchtypicalminiaturizedheatexchangeunitsasmicro2channelheatexchangers,micro2channelevaporatorsandmicro2channelheat2ers.Keywords:heatexchangetechnology,miniaturization,micro2channel,microheattransfer,miniaturizedchemico2mechanicalsystem,plate2fintype,heat2pipetype=ApplicationandDevelopmentofSteamTurbineSealingTechnologies[,]PWEILin2jian,LIChun2qing,GAOLei,etal(HarbinNo.703ResearchInstitute,Harbin,China,PostCode:150036)PPJournalofEngineeringforThermalEnergy&Power.-2005,20(5).-455458Steamturbineglandsealisamajorconstituentelementofaturbine,whichhasadirectbearingonthesteamleakageofaturbineseal,andthusaffectsthethermalefficiencyofasteamturbineunit.Inthelightofthesealingmechanismofvariouskindsofglandsealconstructionthesealingperformanceofvariousturbineglandsealscurrentlyinuseisanalyzedandcom2paredalongwithaforecastofthedevelopmentprospectsofturbinesealingtechnology.DescribedinespecialdetailistheadjustableglandsealofBrandontypedevelopedbyU.S.BrandonEngineeringCo.intherecentdecadeorsoandnowex2tensivelyusedworldwide.Byusingthistypeofglandsealsitispossibletoenhancetheturbineoperationalsafetyandreli2abilityaswellassignificantlyimproveitsthermalefficiency.However,itsuseinChinahasgivenrisetoglandsealrustcor2rosionandspringplasticdeformation.Keywords:steamturbine,steamgland,application,development=Three2dimensionalNumericalSimulationoftheFlowCharacteristicsataLargeIncidenceoftheVariable2geometryPowerTurbineofaMarineGasTurbine[,]PFENGYong2ming,LIUShun2long(Power&NuclearEnergyEngineeringInstituteundertheHarbinEngineer2ingUniversity,Harbin,China,PostCode:150001),LIUMin,WANGLin(HarbinNo.703ResearchInstitute,Har2bin,China,PostCode:150036)PPJournalofEngineeringforThermalEnergy&Power.-2005,20(5).-459463Byemployingthree2dimensionalnumericalsimulationtechniquesastudywasconductedoftheflowfieldmechanismoftheaerodynamicperformancevariationofavariable2geometrypowerturbinecausedbytherotationofadjustableguidevanes.Theresultsofthestudyindicatethatwithinarangeofrelativelysmallturninganglestheadjustableguidevanesdesignedbyusingalargeturninganglewillenabletheturbinetooperateatalargeincidence.Thethree2dimensionalseparationflowfieldstructureanditsgenerationmechanismintherotatingcascadeflowchannelofanadjustableguidevanestageatalargepositive