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©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.()(),,5,5cS;St/T,S,4t/Tt/T=1.0TQ05312A025426094(2009)0420343205,(=d/D0.5,dD)GB15021998,,[14],;[5,6],(),,,,,,11.1,,1=0.75,T,t,4(t/T=0.250.500.751.00),,(),1/411.220g,,,,[]t=137MPa,s=3433643,,19683,,213016©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=191GPa,=0.31.3,,,,3:,3[7],,5500060000,221.4FCDz,yx,,xp=1.000MPa,BGpz=15.129MPa,EFpx=14.088MPa1.5,[8]1[8],22.12.1.11[8][8]MPa[8]MPaMPa%4749.052.18853.3088.795849.052.14553.2208.616949.051.87651.9598.08,,,,2.1.2,,,;,,,2.1.3,,,3,,,2.2,,,,,,[9],,4432009©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:()E(),3,c,dc32.3,,,,,,,p(pm,pLpb),QF3(Sm),:pm=SIKSmpL=S1.5KSmpL+pb=S1.5KSmpL+pb+Q=S3SmpL+pb+Q+F=SSaK;Sa3,SS2S,t/T,c,(,c),,ct/T,c,S,(,[10]),t/T,a,,,bd,t/T=1.0,abcd,t/T(t/T=0.25),E(2)2,e,,t/T,,,543364©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:S1.5[]t=205.5MPaS3[]t=411.0MPa2,33,t/T=1.00()3t/T0.250.500.751.00Smax/MPa265.0256.3230.4187.9Smax/MPa308.8281.3269.6228.444.1,4.2,5,cS,St/T4.3SS4t/T,,t/T=1.001,,..,1991,50(1):8162,.0.5.,1991,8(3):39453,,..,1992,13(6):264MoffatDG,MistryJ.InteractionofExternalMomentLoadswithInternalPressureonanEqualDiameterBranchPipeIntersection.JournalofPressureVesselTechnology,1986,108(4):4434525..,1998,20(2):71746,,..,2007,20(2):58627MoffatDG,MistryJ,MooreSE.EffectiveStressFac2torCorrelationEquationsforPipingBranchJunctionsun2derInternalPressureLoading.JournalofPressureVesselTechnology,1999,121(2):1211268.:[].:,20009..:,199510,..,2000,17(5):3740(:2009202226,:2009204215)EvaluationontheStressStrengthattheJunctionAreabetweentheCylinderofanInternalPressureVesselandItsBigNozzleZHANGJing1,GUILiang2(1JiangsuPolytechnicUniversity,Changzhou,213016,Jiangsu,China;2XianUniversityofTechnology,Xian,710048,Shaanxi,China)AbstractThestressdistributionofthestructureofapressurevesselwiththesameopeningratiosanddifferentdiameterratiosbetweennozzlesandcylinderswascalculatedusingfiniteelementmethodfortheproblemthataveryhighstressconcentrationwouldbegeneratedafterabigdiameterholewasopenedonthecylinderof(ContinuedonPage354)6432009©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(6):101910282,,..,2005,27():32373,,..,2007,34(6):3213254,.().:,2006.3313325,..:,2005.164178(:2008210208,:2008212209)DynamicPerformanceAnalysisofCoaxialOppositeDirectionImpingingStreamMixersLIChengzhi,ZHANGJianwei,HUBailong(ShenyangInstituteofChemicalTechnology,Shenyang,110142,Liaoning,China)AbstractAcalculationmodeloftheoutlettemperatureofthecoaxialoppositedirectionimpingingmixerswasfoundedintheimpingingandmixingprocessofcoolandhotwaterbasedonthemixingcharacteristicsofthemixers,thedynamicprocessoftheoutlettemperaturevaryingwithphasestepoftheinlettemperatureofcoolandhotwaterwascalculated,theinfluenceoftheflowofcoolandhotwateratinletandthevolumeofthemix2ersonthedynamicprocesswasinvestigated.Theresultshowsthatthedynamicprocessoftheinlettemperatureofthemixersisanasymptoticprocesswithoutoscillation,theregulatingtimesignificantlyincreaseswiththeincreasesoftheflowatinletandthevolumeofmixers.KeywordsImpingingStreamMixer,DynamicCharacteristics(ContinuedfromPage346)aninternalpressurevessel,andfivestresstreatmentlinesonthestressdangersectionwereselectedforstressstrengthevaluation.TheresultshowsthattheprimarylocalthinmembranestresscomponentS0ofthestresstreatmentlinecamongthefivestresstreatmentlinesismaximum;andthemaximumvalueoftheprimarystressplussecondarystressSoccursindifferentstresstreatmentlinesbasedonthet/Tratio.Therefore,theevaluationofSshouldbeperformedforeachstresstreatmentline.Inthecalculationsampleoftheauthor,onlythestructureoft/T=1.0infourstructuresoft/Tcansatisfythecriteriademandofanalysisanddesignofstress.KeywordsPressureVessel,Cylinder,Nozzle,JunctionArea,StressStrength,FiniteElementAnalysis(397)LeakCauseAnalysesoftheMechanicalSealsoftheCentrifugalPumpoftheReboilerinanAcrylAcidPlantandRetrofitsSHENHongyun,MAZhenlong(WeidaConstructionandInstallationEngineeringCompany,CNPCLanzhouChemicalCompany,Lanzhou,730060,Gansu,China)AbstractTheleakcausesofthemechanicalsealsofthecentrifugalpumpofthereboilerinanacrylacidplantwereanalyzed,somecorrespondingretrofitmethodswereproposed,andgoodoperationresultswereobtained.KeywordsCentrifugalPump,AcrylAcidPlant,MechanicalSeal,Retrofit4532009