基于滚压成型工艺的无扩口接头静密封特性分析  

Static Sealing Characteristics of Flareless Joints Based on Roll Forming Process

作　　者：黄卫华 刘学文 耿语恒 宫瀚文 权凌霄[2,3] 苏驰 HUANG Wei-hua;LIU Xue-wen;GENG Yu-heng;GONG Han-wen;QUAN Ling-xiao;SU Chi(Wuhu State-owned Machinery Factory,Wuhu 241000,China;School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control,Yanshan University,Qinhuangdao 066004,China;People's Liberation Army Unit 93147,Chengdu 610000,China)

机构地区：[1]国营芜湖机械厂,安徽芜湖241000 [2]燕山大学机械工程学院,河北秦皇岛066004 [3]燕山大学河北省重型机械流体动力传输与控制实验室,河北秦皇岛066004 [4]中国人民解放军93147部队,四川成都610000

出　　处：《液压气动与密封》2024年第8期17-24,共8页Hydraulics Pneumatics & Seals

基　　金：国家自然科学基金面上项目(51775477)。

摘　　要：针对滚压成型工艺下无扩口导管接头,将三维滚压过程简化到二维平面进行分析,建立成型扭矩及螺母预紧力矩的等效换算方程,对导管-管套接触面间的密封机理进行解析。基于无扩口导管接头二维有限元模型,对滚压接触面间的密封性能进行评价,得到四处有效密封带。同时,深入探究了滚压成型扭矩以及装配状态下介质压力对接头体密封性能的影响规律,结果表明,成型扭矩及介质压力均对接头体的密封性能具有正向作用。最后,进行了接头体在2倍工作压力下耐压试验,经检验试验件无泄漏情况,证明接头体具有良好的密封性能。The three-dimensional rolling process is simplified to a two-dimensional plane for the analysis of the flareless conduit joint body under the rolling molding process,and the equivalent conversion equations of the molding torque and the nut preloading torque are established to analyze the sealing mechanism between the conduit-sleeve contact surfaces.Based on the two-dimensional finite element model of the flareless conduit joint,the sealing performance between the rolled contact surfaces is evaluated,and four effective sealing bands are obtained.At the same time,the influence of rolling molding torque and medium pressure on the sealing performance of the joint body under the assembly state was investigated in depth,and the results showed that both the molding torque and medium pressure had a positive effect on the sealing performance of the joint body.Finally,the pressure resistance test of the joint body was carried out under 2 times of the working pressure,and the test pieces were inspected without leakage,which proved that the joint body had good sealing performance.

关 键 词：导管接头 滚压成型 密封性能 有效密封带 耐压试验 

分 类 号：TH137[机械工程—机械制造及自动化] TB42[一般工业技术]