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:100225855(2006)0520001204:(1947-),,,,(,315020)AutoCAD,;;;:TH134:ATriminterferenceanalysisofmetalhardseatedbutterflyvalveNIPing,YANGJian-ning(NingboAMICOCopperValvesMfgInc,Ningbo315020,China)Abstract:ThisessayistoprovidequalitativeandquantitativeanalysisfortheinterferencesolidcreatedduringsealextrusionofmetalhardseatedbutterflyvalvewithAutoCAD,aswellastoprovidedesign2ingproofforthemodification,validationanddeterminationofthethree-eccentricityparametersofbutterflyvalve,withanalysisoftheoptimizedperformanceofdoubleeccentricitysphere.Keywords:metalhardseatedbutterflyvalve;three-eccentricitybutterflyvalve;seal;interference1(),,AutoCAD,(),,(1)(2),(3)(),01030105mm()(4)(,)(5),011,,221112avatf(=),a,afXafab=H,L(L)Yb,afcb,atmn,cbnm,nbAA90,BAAgddbnbhhd1200651o(),hoe,af,=,K=B/tg2cos2B,,mmK,mmA,mmA=Bcos/cos2H,mmH=Kcos==9,A=11013B,K=31156B,=01228212PN=215MPa,DN=800mmB=770mm,L=36mm,h=13mmb=62mm,e=12mm,922(DN800mm)213,Q0101,AutoCAD,,()UCS,,90(3),UCS,XY,()3,(1)1mm01010102011m013337016743137m01337016743137m101827211665108179m121147241308122111214D507,1215mm=/E,l=pl/EAE=2106105MPa,P/A=qMF,2,qMF=19MPalmax=22mm,l=01002mm,01002mm,,,,,01010103mm,,220065215(1)(2),(3)010101013mm,,0102,,010007mm,,(01005mm),,011,,0112mm,,,,,,,,,,,3,,,,,311PN215MPa,DN200mm,B=185mm,12mm,8mmb=22mm,e=6mm,9,44(DN200mm)312(1)011,,(5)5(2)011,(6),18,6313,,e,b(2),e,b=32006512,P(4),,e2emmbmmmm01101106229512-41072119,,,,,4740mm,33mm,3mme=2mm,b=25mm,,,-015-1-4,,7UCSY25mm,Y,Y90,(3)3mm-015010202010202010203010203-110010401010401010406010406-4100115600115600116060116063,0101mm,,,,(8),85(1)AutoCAD,,,(2)e,b,(3),,,,(4)1,..J,2003(8),18-20.2.M.:,1992.(:2006108107)420065