石油井安全阀弹簧蓄能密封性能分析及结构优化  

Performance Analysis and Structure Optimization of Spring Energy Storage Seal for Oil Well Safety Valve

作　　者：纪佳馨 杨志康 张帆[2] 陈升山 王跃明 郭飞[2] JI Jiaxin;YANG Zhikang;ZHANG Fan;CHEN Shengshan;WANG Yueming;GUO Fei(College of Mechanical and Electronic Engineering,China University of Petroleum(East China),Qingdao Shandong 266580,China;State Key Laboratory of Tribology in Advanced Equipment,Tsinghua University,Beijing 100084,China;Beijing Qinglan Xinke Sealing Technology Co.,Ltd.,Beijing 100084,China)

机构地区：[1]中国石油大学(华东)机电工程学院,山东青岛266580 [2]清华大学高端装备界面科学与技术全国重点实验室,北京100084 [3]北京清蓝新科密封技术有限公司,北京100084

出　　处：《润滑与密封》2024年第8期1-9,共9页Lubrication Engineering

基　　金：国家重点研发计划项目(2021YFB3400601)。

摘　　要：为研究一种适用于超高压石油井安全阀用密封圈,设计一种适用于做往复运动的弹簧蓄能密封圈结构方案,并分析密封圈唇口结构对密封性能的影响规律。通过构建V形等效弹簧建立二维轴对称模型,借助ABAQUS有限元仿真软件分析不同唇口结构的接触应力状态;以泄漏量为指标,评价单唇和双唇在介质压力35、70、105 MPa和相对运动速度4~8 mm/s下的密封性能;并在双唇口结构优化的基础上,分析唇口角度和唇口间距对密封性能的影响规律。结果表明:在70 MPa介质压力以下,单/双唇结构的密封性能随介质压力变化的趋势相同,随着介质压力逐渐升高,双唇结构的优势逐渐明显;双唇优化后,唇口角度和唇口间距仅对唇口局部接触压力分布有影响,对密封性能的影响十分有限;相对运动速度对2种结构的密封性能影响具有相同的规律;双唇结构密封性能整体比单唇结构提高约25%。To study a sealing ring suitable for safety valves in ultra-high pressure oil wells,a spring energy storage sealing ring structure scheme suitable for reciprocating motion was designed,and the influence of the sealing ring lip structure on sealing performance was analyzed.By constructing a V-shaped equivalent spring and establishing a two-dimensional axisymmetric model,the contact stress states of different lip structures were analyzed using ABAQUS finite element simulation software.The sealing performance of single and double lips was evaluated using leakage as an indicator under medium pressures of 35 MPa,70 MPa,105 MPa,and relative motion speeds of 4 mm/s to 8 mm/s.On the basis of optimizing the double lip structure,the influence of lip angle and lip spacing on sealing performance was analyzed.The results show that under a medium pressure of 70 MPa,the sealing performance of single/double lip structures exhibits the same trend as the medium pressure changes.As the medium pressure gradually increases,the advantages of double lip structures become apparent.After optimizing the double lips,the lip angle and lip spacing only affect the local contact pressure distribution at the lip,and the impact on sealing performance is very limited.The relative motion speed has the same effect on the sealing performance of the two structures.The overall sealing performance of the double lip structure is improved by about 25%compared to the single lip structure.

关 键 词：弹簧蓄能密封 弹簧等效 双唇结构 泄漏量 石油井安全阀 

分 类 号：TH136[机械工程—机械制造及自动化]