管式空气预热器的防振设计示例与分析

:CN23-1249(2002)02-0028-02:2002-02-03:(1972-),,,1995,,(,150046):,fkfC,,,:;;;;:TK223.34:BAnalysisandExampleofAntivibrationDesignofTubularAirPreheaterWANGXin-ying,SUNZhen-long,LUHong(HarbinBoilerCo.,Lid.,Harbin150046,China)Abstract:ProvidingthemethodofjudgingwhetherTubularairpreheatervibrates,andacquaintingthepracticablemethodtoeliminatethevibrationbycomparingthevalueofkarmanvortexfrequency(Fk)withthevalueofair-chamberacousticwavesfrequency(Fc).Now,Wereceivethegoodeffectinthepractica2bleproject.Keywords:Tubularairpreheater;Vibrate;karmanvortexfrequency(Fk);Air-chamberacousticwavesfrequency(Fc);Clapboard.0,,,,,,,,1,3:fkfc;;,1,,,fkfc,fc,,fk,fk220025BOILERMANUFACTURINGNo2May.2002©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.60Hz,fk40Hz,,1.1,;,112StSt40mm,,S160mm,40mm,,St0145-01551.2.1CC,,,1125MWCFB4BMCRC1BMCR4/ms-1//ms-1916268125464179102281754471481318912542914715149175410171.2.2BMCRfkfcnfkfc,n,n=1,n=44,fk:fk=StVD(1):D,m;V,m/sfc:fc=nc2L(2):n,n=1234;L,L=12.13m;C,m/sStCV(1)(2),::fk1=59Hz,fc1=19.1nHz;:fk2=56Hz,fc2=18.5nHz;:fk3=51Hz,fc3=17.1nHz;:fk4=46Hz,fc4=16.9nHz,BMCR(fk40Hz),fkfc,n=3,fcfk3,1.2.3(1)(2),,L,,fc,3(4mm),4,:L=L4=3.032m,(St),25%-30%,fc(1.25-1.3)fk4,1,1L(2),:fc=nc2L=76.6Hz,fc-fkfk=013fc(1.25-1.3)fk3=4mm,,,,,2,,(:)922,:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.