摘要
由于燃烧室机匣法兰螺栓连接处存在漏油问题,影响发动机的使用寿命和工作性能,还会污染环境、浪费油料。基于悬臂梁挠度变形理论,采用解析法推导螺栓连接结构挠度变形方程,建立优化连接结构密封设计的方法;在ANSYS中建立机匣螺栓连接精细有限元模型,计算法兰结合面在不同载荷形式下的轴向间隙分布;采用加强连接密封性的实施方案,通过数值模拟分析不同厚度密封圈的封严效果。结果表明:本文推导的方程能计算出法兰连接结构受载变形量,适用于连接结构密封优化,采用的方案能够解决实际工程应用中机匣法兰螺栓连接处漏油问题。
The oil leakage at the bolt connection of the combustion chamber casing flange can influence the service life and working performance,pollute the environment,and waste the oil.Based on the deflection deformation theory of cantilever beam,the analytical method is used to deduce the structural deflection deformation equation of bolted connection,and the sealing design method of optimized connection structure is established.The fine finite element model of the casing bolted connection is established in ANSYS to calculate the axial clearance of the flange joint surface under different load forms,and the implementation plan to strengthen the sealing performance of the connection is also proposed.Through numerical simulation,the sealing effect of the sealing ring of different thicknesses is analysed.The results show that the deduced equation can calculate the deformation of bolted connection structure under the load,and is suitable for sealing optimization of connection structure.The proposed scheme can solve the problem of oil leakage at the bolted connection of the combustion chamber casing flange.
作者
曾祥虎
许瑛
张悦
徐张桓
ZENG Xianghu;XU Ying;ZHANG Yue;XU Zhanghuan(School of Aircraft Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《航空工程进展》
CSCD
2021年第2期143-149,共7页
Advances in Aeronautical Science and Engineering
关键词
机匣
螺栓连接
漏油
轴向间隙
密封性
casing
bolted connection
oil leakage
axial clearance
sealing performance
