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562006(07):20051111(,276826)[]1,,,,,[];;[]TK223.3+2[]B[]10023364(2006)0800560211FosterWheelerFWESA1189.2/17.141,1999915,164,L,,15,20(2TP304H,18T22);30,10(TP304H)20041,716342,7171110,72,1(TP304H,d57.15mm7.2mm)22300mm,190mm,156mm,1(4.55.0)mm,;;1m,d67mm,17.5%(2),(3);,,(4),,,2006(07)572320042003,,,80100,,,,/,,,20041B,TP304H,1/2,,0.1mm(5)520051C,,300,59,20%;45,15%,195,65%;,3/4,0.5cm,,(60)602006(07),,,,,96.5MPa,,,,96.5MPa,(),2,4,,,,42984MWC3660MW,,[][1],.[M].,1997.(55)[][1],.[M].:,1985.[2].[M].:,1985.[3],.BT250225125021[J].,1998.[4],.150[R].,2004.[5].150[R].,2004.[6].50MW[J].,2003.[7],,.[J].,2003.[8].[J].,2002.[9].[J].,2006.[10].4[R].,1987.[11],.3[R].,1988.[12].[J].,1989.(57)4,,,:(1),(2),,1mg/L,(3),,,(4),Keywords:methodofmeasuringsilicon;silicicacidradica;sheltering;dissociation;phosphomolybdicheteropolyacidANALYSISOFTHERMALSTRESSFORROTOROF50MWSTEAMTURBINEHUANGWeixian,WANGBining,YANGBaixunetal(52)Abstract:Thetemperaturefield,thermalstressfield,andmechanicalstressunderdifferentoperatingconditionsbeforeandaftercrackturningoftherotorfor50MWsteamturbineinonepowerplanthavebeencalculatedthroughthefiniteelementanalysis.Theresultsofcalculationshowthatthecracktobesituatedatlocationofmax.stressoccurredontherotor.Afterturning,theelasticslotatthecrackpositionmakesthemax.stressontherotortobelowered,thesizeofelasticslotaffectsgreatlythefactorofstressconcentration.Theresultsofcalculationprovidetechnicaldataforrotorscrackturningfabricatingschemeandforsafetyassessment.Keywords:50MWsteamturbine;crackonrotor;stressanalysis;transienttemperaturefield;thermalstress;centrifugalforceANALYSISOFTUBEBURSTRESULTINGFROMPEELOFFOFOXIDESKINFROMINTERNALWALLANDBLOCKAGEINAUSTENITICSTAINLESSPIPE,ASWELLASCOUNTERMEASURESTHEREOFWANGSheng(56)Abstract:Directingagainsttubeburstproblemofausteniticstainlesssteelpipeinfinalstagesuperheaterofboilerno.1inonepowerplant,itisbe2lievedthatthemaincausetobepeeloffofoxideskinfrominernalwallofsteelpipeandblockageinthesaidtubethroughmacroscopicexamination,metallurgicalanalysisandoxideskininspection.Forthis,somemeasureshavebeenputforward,including:strictlycontrollingmetaltemperatureofturbineandboilerparts;blowingoutwithsteam;suitablyenhancingthespeedofincreasingordecreasingtheloadofunit;carryingoutaimeddetec2tionbyusingoxideskindetectingtechnologyetc.,toensurethesafetyofoperation.Keywords:austeniticstainlesssteel;oxideskin;peeloff;blockage;overtemperaturetubeburstAPPLICATIONOFHYDRAULICRADIALFITBOLTSONTOCOUPLINGSMENGTao,LUBaocheng,LIPengju(58)Abstract:Thestructure,features,workingprinciple,andrepairtechnologyetc.ofhydraulicredialfitboltsmanufacturedbyPIGRIMcompanyinUSAandusedoncouplingshavebeenpresentedindetail.Comparedwithconventionalcouplingbolts,thehydraulicradialfitboltscaneffectivelypreventunsmoothstagnation.Applicationofhydraulicradialfitboltsontocouplingscanshortenrepairtimeduration,enhancingrepairqualityoftheunits.Keywords:turbogenerator;coupling;hydraulicradialfitboltREMEDYOFELECTROCORROSIONFAULTFORGEARSINCOUPLINGOFMOTORDRIVENFEEDWATERPUMPSHIXinfeng,YAOYao(61)Abstract:Thetransmissiongearsofmainoilpumpinhydrauliccouplingofthemotordrivenpumpsetfor200MWunitinZhengzhouXinliElectricPowerCoLtdhavebeenfrequentlydamaged.Itisbelievedthroughanalysisthatthecausetobeelectrocorrosion.Thisproblemhasbeensuccessful2lysolvedbyadoptingmethodtocutoffthepathofshaftcurrent,andpreventivemeasuresbeingfurtherputforward.Keywords:motordrivenfeedwaterpumpset;hydrauliccoupling;gears;electrocorrosion;insulationEXISTINGPROBLEMSINAIRCOOLINGSYSTEMOFGENERATORNO.1ANDRETROFITTHEREOFLIUFeng,YANGGuiying(63)Abstract:Themidleparttemperatureofstatorwindingforgeneratorno.1inminemouthpowerplantunderPingmeiGroupwassomewhathigher,limitingtheoutputcapacityofsaidgenerator.Throughanalysisandtest,ithasbeenfoundthattheunreasonabledistributionofgeneratorscoolingairtobethemaincauseresultinginhighmidleparttemperatureofthestatorwinding.Directingagainstthesaidproblem,retrofitofthecoolingairsys2temforthegeneratorhasbeencarriedout.Afterretrofitting,themidleparttemperatureofstatorwindinghasbeengreatlylowered,thegeneratorcanadditionallybeloadedabout5000kW,havinggoodresult.Keywords:generator;statorwinding;statorsironcore;aircooler;coolingairCAUSEANALYSISOFJAMMINGANDAIRLEAKAGEOFTHEHOTAIRDAMPERANDRETROFITTHEREOFANXuezhong,XIEWenjun,YIEFeng(65)Abstract:Thecausesleadingtojammingtroubleandairleakageoftheprimaryhotairdamperinapositivepressuredirectinjectioncoalpulverizingsystemofa600MWthermalpowerunithavebeenanalysed,andaretrofitschemebeingputforward.Afterretrofitting,theoperationaleffectivenessofsaiddamperisgood,theleakageairandservicepowerarereduced.Keywords:600MWunit;boiler;coalpulverizingsystem;hotairdamper;jammingtrouble;airleakageCAUSEANALYSISANDCOUNTERMEASURESFORBURSTCRACKINGOFPLATENSUPERHEATEROFBOILERNO.1ZHANGMinqi,XUEJialin,GAOShangde(69)Abstract:Throughmacroscopicexamination,wallthicknessmeasurement,andmetallographicexaminationoftubespecimentakenfromtheburstedplatensuperheaterofboilerno.1,thecausesleadingtotubebursthavebeenanalysed.Resultsshowthatthetubeburstismain