球阀球体密封应力分析及强度校核

1961－。1002-5855201601-0006-021221．2625002．730050。TH134ATheStressAnalysisandStrengthCheckontheSealingSurfaceoftheSphereofBallValveLIUMing-hua1WANGShou-jin2LIShu-xun21．ShandongYiduValveGroupCo．LtdYidu262500China2．LanzhouUniversityOfTeachnologyLanzhou730050ChinaAbstractAimingattheproblemthatstrengthofballvalvesealingsurfacecannotmeetthesecurityre-quirementsforceanalysisofthevalvespheresealingareawascarriedoutamethodofcheckingcalcu-lationforspherestrengthisputforwardwhichprovidesreferenceforrationalselectionofthespheresi-zesoftheballvalve．Keywordsballvalveinitialtensionofspringspherediameterthestressanalysisstrengthcheck1。1。。。22.1a－a11FNFMFT。FMa－aFT。FT=FNtanα1tanα=16Ｒ2D1+D2槡－12α———°Ｒ———mmD1———mmD2———mm1—6—20161DOI:10.16630/j.cnki.1002-5855.2016.01.0032.22。a－aFS'FS'=ql2+FT3q=πDp4l=D1+D24tanα5q———NP———MPal———mmabc22.33。1a－att=D1+D24－D263D———mm2AA=πD1+tt73τ4τ=FS'A83τ≤0．9σt9σt———MPa9。4。。。1．M．1994．2．．M．2010．3ASMEB16．34－2004、S．4．M．2004．5．M．2002．6．M．2009．2015．07．01—7—20161