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20~70 g·mm,极个别情况下达到80 g·mm以上,接近100 g·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(70 g·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100 g·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。
Taking a domestic independently-developed civil turboshaft engine in development as the object,the maximum unbalance exploration research based on airworthiness requirements was carried out.The deterioration of unbalance during the first TBO of an in-service turboshaft engine was statistically analyzed,finding this turboshaft engine had the same configuration and the same magnitude with this one researched in this paper.The deterioration of unbalance in normal service of this turboshaft engine was 20-70 g·mm,and in those rare cases it reached above 80 g·mm,close to 100 g·mm.On this basis,the unbalance response of the turboshaft engine was analyzed based on the short bearingπoil film model,and the maximum unbalance exploratory experiment was carried out both on a rotor test device and an engine test device.The calculation and experiment results showed that,the engine could work stably at all speeds in normal service unbalance deterioration(70 g·mm);under special cases,when the unbalance reached and exceeded 100 g·mm,the engine vibrated seriously,especially when the unbalance was of out-of-phase distribution,the engine vibrated violently during the 2st critical speed region.The vibration speed range was wider,and the engine could not work properly.
作者
宋明波
严平
王旭
向有志
杨洋
谢荣华
SONG Mingbo;YAN Ping;WANG Xu;XIANG Youzhi;YANG Yang;XIE Ronghua(Hunan Aviation Powerplant Research Institute,Aero Engine Corporation of China,Zhuzhou Hunan 412002,China;Beijing Audit Center of the Central Military Commission Audit Office,Beijing 100041,China)
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2023年第6期1467-1473,共7页
Journal of Aerospace Power
基金
国家科技重大专项(2017-Ⅰ-0008-0009,J2019-Ⅳ-0005-0072)。
关键词
适航
涡轴发动机
转子
最大不平衡
振动
airworthiness
turboshaft engine
rotor
maximum unbalance
vibration
