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600MW超临界机组汽动锅炉给水泵水动力及临界转速的分析与计算的综述报告.docx

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600MW超临界机组汽动锅炉给水泵水动力及临界转速的分析与计算的综述报告 Abstract Inthisreport,thewaterdynamicsandcriticalspeedanalysisandcalculationforthe600MWultra-supercriticalunitsteamboilerfeedpumparereviewed.First,thebasicprinciplesandparametersofthesteamboilerfeedpumpsystemareintroduced.Next,thecalculationmethodandformulaforcalculatingthecriticalspeedofthefeedpumprotorarediscussedindetail.Theimportanceofwaterdynamicsinthesystemisdiscussed,andthefactorsaffectingwaterresistanceareanalyzed.Finally,thereportdiscussesthemeasuresthatcanbetakentoreducewaterresistanceandpreventcriticalspeedsfromoccurringinthesystem. Introduction Thesteamboilerfeedpumpisanimportantcomponentinapowerplant,responsibleforprovidinghigh-pressurewatertothesteamboiler.Thewaterdynamicsandcriticalspeedofthefeedpumpsystemareimportantfactorsthatneedtobeconsideredduringthedesignandoperationoftheplant. The600MWultra-supercriticalunitsteamboilerfeedpumpisacomplexsystem.Ifthepumprotoroperatesataspeedclosetoitscriticalspeed,itmaycausevibrationanddamagetothepump.Therefore,itisnecessarytoanalyzethewaterdynamicsandcriticalspeedofthefeedpumpsystemandtakeeffectivemeasurestopreventpotentialproblems. Basicprinciplesandparametersofsteamboilerfeedpump Thesteamboilerfeedpumpsystemisdesignedtoprovidehigh-pressurewatertothesteamboiler.Thesystemconsistsofthefeedpump,theturbine,andthecondenser.Thefeedpumpisdrivenbyasteamturbine,whichispoweredbythesteamgeneratedbytheboiler.Thehigh-pressurewaterispumpedfromthefeedwatertanktothesteamgenerator,whereitisheatedtoproducesteam.Thesteamisthenusedtodrivetheturbineandgenerateelectricity. Theparametersofthefeedpumpsystemincludetheflowrate,pressure,andspeedofthewater.Theflowrateofthewaterisdeterminedbythepoweroutputoftheplantandthespecificenergyconsumptionofthefeedpump.Thepressureofthewaterisdeterminedbythepressureofthesteamintheboilerandthepressuredropinthefeedpump.Thespeedofthepumprotorisanimportantfactorthataffectsthewaterdynamicsandcriticalspeedofthesystem. Calculationmethodandformulaforcriticalspeed