摘要
为了实现航空发动机机匣安装边结合面接触应力测量与分布规律研究,基于一种具有超宽压力监测范围的MXene柔性压力传感器建立了机匣安装边接触应力动态测量系统,将其安装在两层安装边之间,并铺设13个测点,根据传感器的电阻变化率时域响应及压力标定曲线,实时获得对应测点的应力变化。将试验结果与仿真结果进行对比,趋势吻合良好,应力误差均低于7%。并开展结构参数与预紧力矩对接触应力影响规律的研究,得到提高密封性能的措施。研究表明,所建立的分析方法和测量系统可以准确实现接触应力的动态测量,影响规律分析可以为安装边密封设计提供参考。此外,研究方法具有普遍的适用性,对实现不同机匣安装边接触应力测量与规律分析具有一定的指导意义。
This study is aimed at investigating the measurement of contact stress and its distribution pattern across the attachment surface of an aero-engine casing flange.To begin with,a dynamic contact stress measurement system for casing flanges was established based on MXene flexible pressure sensors with an ultra-wide pressure monitoring range.The measurement system was sandwiched by two flanges,and up to 13 measurement points were distributed therein.The stress changes of the corresponding measurement points were obtained in real time according to the time-domain response of the sensor resistance change rate and the pressure calibration curve.The comparison of the test results with the simulation shows satisfactorily consistent trends,displaying stress errors lower than 7%.Subsequently,the influence of structural parameters and pre-tightening torque on contact stress were studied,and possible measures for improving the sealing performance were applied.The findings suggest that not only can the proposed analytical method and measurement system provide accurate dynamic measurements for contact stresses,but the studied influencing relationship can also serve as a reliable reference for upcoming sealing performance optimization design for flanges.Last but not least,owing to the universal applicability of the methods presented,this research method also offers an invaluable guidance for contact stress measurements and distribution analyses of various casing flanges.
作者
艾延廷
王银虎
刘玉
田晶
付鹏哲
刘仕运
AI Yanting;WANG Yinhu;LIU Yu;TIAN Jing;FU Pengzhe;LIU Shiyun(Liaoning Key Laboratory of Advanced Measurement and Test Technology for Aviation Propulsion System,School of Aero-Engine,Shenyang Aerospace University,Shenyang 110136,China;AECC Shenyang Engine Research Institute,Shenyang 110015,China)
出处
《航空制造技术》
CSCD
北大核心
2023年第19期76-83,共8页
Aeronautical Manufacturing Technology
基金
辽宁省教育厅面上项目(JYT2020053)
沈阳航空航天大学博士启动基金(19YB39)。
