摘要
为解决实际工况中飞机管路密封性能问题,根据扩口式液压管路连接件的结构特点,考虑连接件接触对的多种接触关系,建立飞机管路连接件多体接触有限元模型,提出保证扩口式管路连接件基本密封性能的密封闭环、有效密封面积以及有效密封比压3个主要密封准则。利用有限元软件ANSYS/Workbench分析振动工况对管路密封性能的影响规律,探讨管路密封性能的变化过程、振动载荷作用点与载荷幅值对管路密封性能的影响。结果表明:在振动工况作用下管路连接件外套螺母将逐渐产生松动,进而导致管路连接件的密封性能发生衰退;随着振动周期的增加,外套螺母的松动角度越来越大;当振幅相同时,载荷作用点离螺纹连接副越近,管路连接件密封性能衰减速度越快;当载荷作用点相同时,振幅越大,管路连接件密封性能衰减速度越快。为减少振动工况对管路密封性能的影响,应尽量使管路连接件远离振动激励源并降低振动载荷的幅值,实际工程应用中一般通过打保险丝来减缓管路连接件密封性能的衰退过程。
To solve the problem of sealing performance in aircraft pipeline under actual working conditions,a multi-body contact finite element model of aircraft pipeline connection was established based on the structural characteristics of the expanded hydraulic pipeline connector and considering the multiple contact relationships of the connector contact pairs.Three main sealing criteria were proposed to ensure the basic sealing performance of the expanded pipeline connector,including the sealing closed loop,effective sealing area,and effective sealing pressure ratio.Using finite element simulation software ANSYS/Workbench,the variation process of pipeline sealing performance under vibration working conditions and the influence of vibration load location and amplitude on pipeline sealing performance were analyzed.The results show that the outer nut of the pipeline connector will gradually become loose under vibration conditions,leading to the degradation of pipeline sealing performance.As the vibration period increases,the loosening angle of the outer nut increases.When the amplitude of vibration load is the same,the closer the vibration load location is to the threaded connection pair,the faster the sealing performance of the pipeline connection decreases.When the vibration load location is the same,the larger the amplitude of vibration load,the faster the degradation rate of the pipeline sealing performance.To reduce the impact of vibration on pipeline sealing performance,the pipeline connector should be kept away from vibration excitation sources as far as possible,and the amplitude of vibration load should be reduced.In practical engineering applications,the deterioration process of pipeline connection sealing performance is generally mitigated by blowing fuses.
作者
寸文渊
王博雅
钱进
张杰毅
李栎森
陈果
CUN Wenyuan;WANG Boya;QIAN Jin;ZHANG Jieyi;LI Lisen;CHEN Guo(Chengdu Aircraft Industrial(Group)Company Ltd.,Chengdu Sichuan 610092,China;College of Civil Aviation,Nanjing University of Aeronautics and Astronautics,Nanjing Jiangsu 210016,China;College of General Aviation and Flight,Nanjing University of Aeronautics and Astronautics,Liyang Jiangsu 213300,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2023年第8期181-187,共7页
Lubrication Engineering
基金
国家科技重大专项(2017-Ⅳ-0008-0045)
国家自然科学基金项目(51675263)。
关键词
管路连接件
密封准则
密封性能
振动环境
液压管路
piping connections
sealing criteria
sealing performance
vibration environment
hydraulic pipeline
