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发动机轴承内环装配工艺对转子动力学特性影响的试验研究 |
桑潇潇1,廖明夫1,吴法勇2,王德友2,杨法立2,李浩1,廖俊1,蒋云帆1
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(1.西北工业大学动力与能源学院,陕西西安710072;2.中国航空工业集团公司沈阳发动机设计研究所,辽宁沈阳110015)
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摘要: |
试验研究航空发动机高压涡轮后支点轴承内环的装配工艺对转子支承系统振动特性的影响。改变转子轴承内环和内环衬套的配合公差与轴承内环锁紧螺母拧紧力矩,研究以上参数与转子支承系统振动响应的关系。结果表明:间隙配合和较小的锁紧螺母拧紧力矩给转子系统带来较强的非线性性,转子支承处出现丰富的分数倍频成分;过盈配合时转子振动对内环锁紧螺母拧紧力矩改变不敏感;间隙配合时,较大的锁紧螺母拧紧力矩可以抑制转子支承处的分数倍频成分。 |
关键词: 航空发动机 涡轮 轴承 内环 锁紧螺母 拧紧力矩 配合公差中图分类号:V231.9文献标识码:A文章编号:1001-4055(2015)12-1874-07DOI:10.13675/j.cnki.tjjs.2015.12.017 |
DOI: |
分类号:V231.9 |
基金项目: |
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ExperimentalStudyonRotor-DynamicBehaviorDependenton |
SANGXiao-xiao1,LIAOMing-fu1,WUFa-yong2,WANGDe-you2,YANGFa-li2,LIHao1,LIAOJun1,JIANGYun-fan1
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(1.CollegeofPowerandEnergy,NorthwesternPolytechnicalUniversity,Xi’an710072,China;2.ShenyangEngineDesignandResearchInstitute,AviationIndustryCorporationofChina,Shenyang110015,China)
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Abstract: |
Atestrigwasbuilttostimulatethebearinglocatedinthebackstayofthehighpressureturbine.Inordertoidentifyandassesstheeffectsoftheinnerringassemblytechnologyonthevibrationoftherotor,anexperimentalinvestigationwasperformed.Arangeoffittolerancesandthetighteningtorquesofthelocknutwereusedtotestthedynamicbehavioroftherotor.Theexperimentalresultsrevealthatthepresenceofaninnerringinclearancefitandinsufficienttighteningtoqueintroduceshighnonlinearitytotherotor,thesupportofwhichre.spondswithrichfractionalharmoniccomponents.Withtheinnerringininterferencefit,therotorvibrationisal.mostindependentofthetighteningtoques.Withtheinnerringinclearancefit,aconsiderablylargetighteningtoqueiseffectiveinattenuatingthefractionalharmonicresponseoftherotorsupport. |
Key words: Aero-engine Turbine Bearing Innerring Locknut Tighteningtorque Fittolerance |