第44卷第3期2023年6月Vol.44No.3June2023内燃机工程ChineseInternalCombustionEngineEngineering缸盖螺栓连接副结构对柴油机铝合金缸体缸孔变形的影响包宇专1，雷基林1，李维贤1，邓伟1，宋国富2，刘康2（1.昆明理工大学云南省内燃机重点实验室，昆明650224；2.昆明云内动力股份有限公司，昆明650217）InfluencesofStructureofCylinderHeadBoltCouplingonCylinderHoleDeformationofDieselAluminumAlloyCylinderBlockBAOYuzhuan1，LEIJilin1，LIWeixian1，DENGWei1，SONGGuofu2，LIUKang2（1.YunnanKeyLaboratoryofInternalCombustionEngine，KunmingUniversityofScienceandTechnology，Kunming650224，China；2.KunmingYunneiPowerCo.，Ltd.，Kunming650217，China）Abstract：Acylinderhead–gasket–blockcouplingmodelwaspresentedandthenumericalsimulationmethodwasusedtodeterminetheeffectsofchangingtheboltholedesignparametersonthekeysectionofroundcylinderholedeformation.Andfourevaluationindexesincludingtheaverageroundness，cylindricity，coaxality，andlight-leakingundertheconditionthatthesamecylinderheadboltpre-tighteningforcewasappliedtobothcastironcylinderandaluminumalloycylinder.Accordingtothestudy，thereisalmostnodifferenceinthedeformationtrendofthekeysectionbetweencastironcylindersandaluminumalloycylindersasshownintheFouriertransformation.Theaverageroundness，cylindricity，andcoaxalityroseby54.41%，38.39%，and27.08%，respectively，withlittledifferenceinlight-leaking.Inthecaseofaluminumalloycylinders，alowercounterboreholetoboltholeratioledtolesscomprehensivedeformationofeachsectionandloweraverageroundness，cylindricity，andcoaxality.However，thesectionbelowthemainforcesectionofthescrewthreadwaslessconsistentintheextremephaseangleofthefourth-orderFourierdeformation.Whenthecounterboredepthwaskeptconstantwhilethelengthofthescrewthreadwasraisedproperly，theaverageroundness，cylindricity，andcoaxalityofcylinderholesdecreasedmostdramatically.Asthelengthofscrewthreadwaskeptconstantwhilethecounterboredepthwasreduced，theaverageroundness，cylindricity，andcoaxalityofcylinderholeswerethesmallest，anddecreasedby32.74%，31.24%，...
