双扩口管接头拧紧过程中密封状态分析  

Analysis of the Sealing State of Double Flared Pipe Joint During Tightening Process

作　　者：张林生 刘祥斌 刘超 宋年秀[1] ZHANG Linsheng;LIU Xiangbin;LIU Chao;SONG Nianxiu(School of Mechanical and Automotive Engineering,Qingdao University of Technology,Qingdao Shandong 266525,China;Seah Qingdao Precision Metel Co.,Ltd.,Qingdao Shandong 266426,China;Zhucheng Aoling Automobile Factory of Beiqi Foton Motor Co.,Ltd.,Zhucheng Shandong 262200,china)

机构地区：[1]青岛理工大学机械与汽车学院,山东青岛266525 [2]青岛世亚精密管件有限公司,山东青岛266426 [3]北汽福田汽车股份有限公司诸城奥铃汽车厂,山东诸城262200

出　　处：《润滑与密封》2022年第7期104-110,共7页Lubrication Engineering

摘　　要：为研究汽车制动管双扩口管接头在拧紧过程中的密封性能,借助有限元分析方法构建弹塑性材料模型,研究轴向位移载荷对密封性能的影响;分析管接头在拧紧过程的摩擦力矩,得出轴向拧紧力与扭矩的关系公式;结合金属多线性强化模型与ANSYS非线性仿真,分析双扩口管接头在拧紧过程中的应力与接触面压力动态变化过程,通过扭矩高压泄漏性实验验证仿真方法的有效性。结果表明:随着位移载荷的增大,管接头蘑菇头最大应力与变形增大,接触面压力和密封宽度增大,且接触压力分布区域稳定,在接触面上形成两道密封环;而随着位移载荷的增大,蘑菇头厚度逐渐降低,其表面凹陷加深,当位移载荷增大到一定值时,蘑菇头存在被切断的风险。In order to study the sealing performance of the automobile brake pipe double flared pipe joint during the tightening process,an elastic-plastic material model was constructed with the help of finite element analysis method to study the influence of axial displacement load on the sealing performance.The friction torque of the pipe joint in the tightening process was analyzed,and the relationship formula between the axial tightening force and the torque was obtained.Combined with the metal multi-linear strengthening model and ANSYS nonlinear simulation,the dynamic change process of the stress and the contact surface pressure of the double flared pipe joint in the tightening process was analyzed.The validity of the simulation method was verified by torque high pressure leakage experiment.The results show that with the increase of displacement load,the maximum stress and deformation of the mushroom head of pipe joint increase,the pressure and sealing width of contact surface increase.The distribution area of contact pressure is stable,and two sealing rings are formed on the contact surface.With the increase of displacement load,the thickness of mushroom head decreases gradually,and its surface trench deepens.When the displacement load increases to a certain value,mushroom head may be cut off.

关 键 词：制动管 双扩口管接头 轴向位移载荷 动态密封性能 

分 类 号：TB42[一般工业技术]