文章编号:1000-8055(2023)06-1467-07doi:10.13224/j.cnki.jasp.20220764基于适航要求的某涡轴发动机最大不平衡探索宋明波1,严平2,王旭1,向有志1,杨洋1,谢荣华1(1.中国航发湖南动力机械研究所,湖南株洲412002;2.军委审计署北京审计中心,北京100041)摘要:以国内某在研民用涡轴发动机为对象,系统开展基于适航要求的最大不平衡探索研究。统计分析同构型同量级某在役涡轴发动机首次翻修间隔期不平衡量恶化情况,得到该涡轴发动机正常服役不平衡量恶化分布于20~70g·mm,极个别情况下达到80g·mm以上,接近100g·mm。在此基础上,基于短轴承半油膜模型进行该涡轴发动机转子不平衡响应计算分析,并在转子和整机平台上进行了最大不平衡探索试验。计算与试验结果均表明,在正常服役平衡恶化(70g·mm)下,该发动机全转速范围振动平稳,能够稳定工作;特殊情况下,当不平衡量达到并超过100g·mm时,发动机振动较大,尤其是不平衡呈反相位分布时,激起转子在第2阶临界转速区域剧烈振动,覆盖转速范围更宽,发动机无法正常工作。关键词:适航;涡轴发动机;转子;最大不平衡;振动中图分类号:V231.96文献标志码:AExplorationofmaximumunbalanceofaturboshaftengineaccordingtoairworthinessrequirementsSONGMingbo1,YANPing2,WANGXu1,XIANGYouzhi1,YANGYang1,XIERonghua1(1.HunanAviationPowerplantResearchInstitute,AeroEngineCorporationofChina,ZhuzhouHunan412002,China;2.BeijingAuditCenteroftheCentralMilitaryCommissionAuditOffice,Beijing100041,China)Abstract:Takingadomesticindependently-developedcivilturboshaftengineindevelopmentastheobject,themaximumunbalanceexplorationresearchbasedonairworthinessrequirementswascarriedout.ThedeteriorationofunbalanceduringthefirstTBOofanin-serviceturboshaftenginewasstatisticallyanalyzed,findingthisturboshaftenginehadthesameconfigurationandthesamemagnitudewiththisoneresearchedinthispaper.Thedeteriorationofunbalanceinnormalserviceofthisturboshaftenginewas20−70g·mm,andinthoserarecasesitreachedabove80g·mm,closeto100g·mm.Onthisbasis,theunbalanceresponseoftheturboshaftenginewasanalyzedbasedontheshortbearingπoilfilmmodel,andthemaximumunbalanceexploratoryexperimentwascarriedoutbothonarotortestdeviceandanengi...