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620046AnalysisandTreatmentofBoilerBackPassVibration1,2,1(1.,315010;2.,310014)4600MW,34B&WB-2020/17.3-M,320047168h,,,313350MW,,,,,,450MW560MW,,560MW,,450MW,AH,,AF,,,CF,,:,;,,,:,;560MW350MW,,,,,450MW,,,,,,,70%,60%,,,,350MW675MW(:600MW,,,,:;;Abstract:Thispaperintroducesthephenomenonoftheboilerbackpassvibrationduringthetrialopera2tionoftheboilerofthe600MWset.Basedonalotoftestwork,thecausesofthevibrationareanalysedandtheprojecttoovercomethevibrationismade.Finally,theproblemhasbeensolvedandtheresultsconcludesatisfactory.KeyWords:boiler;backpass;vibration:TK227:A:1007-1881(2004)06-0006-047200461/m/Hz/m/Hz131.837.516937.5225.437.545.237.534.6637.561.437.5446.437.511537.5541.237.524.337.5638.537.510337.57--92.337.58--47.237.59--15837.5SH155.937.532337.5294.737.525737.5RH115.937.524137.5214.137.575.337.5360MW15.826.523.126.57.2126.519826.5),,,600MW,,,600MW,70%60%,30t/h,():(1),,,(2),,(3),(4)(5)22.1,CE,,,,,40,,600MW,46.55m52.6m(),,323m,4.66m,,37.5Hz360MW,,,26.5Hz,1,4,:37.17Hz,27.19Hz2,,,,,,2.2,():fs=SU/D:S;U(m/s);D(m)820046/MW600480300/480460431/358341316U1/ms-18.87.76.3U2/ms-17.86.75.3D/m0.060.060.06S1/m0.11250.11250.1125S2/m0.1020.1020.102S()0.30780.30780.3078fs/Hz45.1439.5032.32fs/Hz40.0134.3727.19:W/m19.972519.972519.9725()K/m1.331.331.33()R/J(kgK)-1282282282T/K753733704T/K631614589f/Hz13.3013.1312.8626.6126.2525.7339.9139.3838.59f/Hz12.1812.0111.7724.3624.0323.5336.5436.0435.30,,W,();,,2/3,:,=2W;,=W;,=2/3W;(Hz):f=nC/2W:C(m/s);n;w(m),(2),,,fs220%(0.8fs/f1.2),fsf,450MW,,300MW,,(3),,439200461.1311.0030.8371.0950.9540.7703fsf(fs/f)4n3N=nn=3-6N=n+1n6N=2n-51,:4,,416,,520mm,16,,11/4,6.7m,6.7m,20046,600MW,2384t/h,3.14%,100%,30%4,,,,89%,31%,2440t/h,228t/h,3.125%,,,78%,42%,:(1),2127t/h,2300t/h,2480t/h,(1.2)(2),,,,,,33,4,4,,BMCR(),5,,3,,,,:2004-08-27:(1966-),,,,,