O形与C形组合密封圈的力学性能对比分析  

Comparative analysis on the mechanical properties of O-ring and C-ring built-up seals

作　　者：黎伟[1,2] 刘志新 陈曦 夏杨 胡亚军 李玉民 Li Wei;Liu Zhixin;Chen Xi;Xia Yang;Hu Yajun;Li Yumin(School of Mechanical and Electrical Engineering,Southwest Petroleum University,610500,Chengdu,China;Key Laboratory of Oil and Gas Equipment Ministry of Education,Southwest Petroleum University,610500,Chengdu,China;Drilling Tubes&Tools Service Company of Zhongyuan Oilfield Service Corporation of Sinopec,457300,Puyang,China)

机构地区：[1]西南石油大学机电工程学院,成都610500 [2]西南石油大学石油天然气装备教育部重点实验室,成都610500 [3]中石化中原石油工程有限公司管具公司,濮阳457300

出　　处：《应用力学学报》2021年第1期306-312,共7页Chinese Journal of Applied Mechanics

基　　金：2019年度四川省苗子工程小发明小创造项目;深海采矿工艺流程及装备技术研究(XSHZ201612);双梯度钻井套管内压力梯度隔断封隔器研究(2018YFC0310201-06);油田智能分注工艺关键技术及测控系统研究与应用(2019E0230)。

摘　　要：建立了O形密封圈与C形组合密封圈的轴对称模型,分析了两种密封圈的静、动密封性能和过孔性能,并计算出了不同压力下密封圈的摩擦阻力。对比两种密封圈的性能,结果表明:O形密封圈适用于较低压力的静密封;高压静密封、压力超过15MPa时的动密封及过孔工况下,O形密封圈的使用需增加挡圈;因O形圈变形严重,局部应力较大,易发生疲劳失效,不适合用于高压下频繁运动和需要过孔的动密封工况;C形组合密封圈的摩擦阻力较小,在动密封和过孔的工况下表现出良好的性能。The axisymmetric model of O-ring and C-type combined sealing ring is established, the static and dynamic sealing performances and through hole performance of the two sealing rings are analyzed, and the friction resistance of the sealing ring under different pressures is calculated. Comparing the performances of the two sealing rings, the results show that: O-rings are suitable for static sealing with lower pressure;for high-pressure static sealing, dynamic sealing with pressure over 15 MPa and through-hole conditions, the use of O-rings requires additional retaining rings. Due to the serious deformation of the O-ring and the large local stress, fatigue failure is easy to occur, and it is not suitable for the dynamic sealing conditions of frequent movement under high pressure and the need for through holes;the frictional resistance of the C-type combined sealing ring is small, and it shows good performance under dynamic sealing and through-hole conditions.

关 键 词：O形密封圈 C形组合密封圈 密封性能 摩擦阻力 

分 类 号：TB42[一般工业技术]