指尖密封径向临界工作能力快速评估方法研究  

Rapid evaluation method for radial critical operating capacity of finger seal

作　　者：王强 张峰 黄清伟 吉洪湖[2] WANG Qiang;ZHANG Feng;HUANG Qingwei;JI Honghu(Shaanxi Interstellar Glory Space Technology Co.,Ltd.,Xi’an 710199,China;College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]陕西星际荣耀空间科技有限责任公司,陕西西安710199 [2]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《推进技术》2024年第7期227-236,共10页Journal of Propulsion Technology

基　　金：陕西省创新能力支撑计划(2022KJXX-30)。

摘　　要：指尖密封具有一定的径向变形能力,从而适应转子的偏心、跳动、离心膨胀和热膨胀,但当转子的径向位移量超过指尖密封正常工作所允许的径向临界工作能力时,将导致密封发生严重的磨损并伴有大量摩擦生热,最终失效。本文建立了一套能够快速评估指尖密封径向临界工作能力的方法。首先针对圆弧型指尖密封,通过理论分析的方法建立了径向临界工作能力的计算模型;其次,开展了实验研究并利用试验数据修正和验证了计算模型;最后,分析了结构参数对径向临界工作能力影响的敏感度。研究结果表明:快速评估方法具有较高的计算精度,验证算例的最大误差约2.55%;指梁之间间隙宽度和指梁根圆直径两个结构参数对指尖密封径向临界工作能力的影响最为显著。Finger seal has a certain degree of radial deformation ability to adapt to the eccentricity,runout,centrifugal expansion,and thermal expansion of the rotor.While the radial displacement of the rotor exceeds the critical operating capacity of finger seal for regular operation,severely wear and frictional heat generation will oc-cur,which ultimately leading to seal failure.A rapid evaluation method for radial critical operating capacity of fin-ger seal was established.Firstly,a calculation model for radial critical operating capacity of the circular arc finger seal was established by using theoretical analysis method.Secondly,experimental research was conducted and the calculation model was corrected and validated using the experimental data.Finally,the sensitivity of structur-al parameters to the radial critical operating capacity was analyzed.The research results indicate that the rapid evaluation method has high computational accuracy,with a maximum error of approximately 2.55%in the valida-tion case.The gap width between finger beams and the diameter of the root circle of the finger beam have a signifi-cant impact on the radial critical operating capacity of the finger seal.

关 键 词：指尖密封 临界工作能力 正交实验设计 快速评估方法 参数敏感度分析 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]