帽形滑环式组合密封的密封性能研究
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摘要
采用ABAQUS软件建立帽形滑环式组合密封有限元模型,研究不同工作压力、密封间隙、运动速度和摩擦因数对其密封性能的影响规律。研究结果表明:静密封工况下,活塞杆与O形圈间的最大接触应力是影响密封性能的关键因素,随着工作压力的增大或密封间隙的减小,O形圈与帽形滑环的最大Von Mises应力均逐渐增大,各表面间的接触应力也逐渐上升;动密封工况下,工作压力越大、密封间隙越小,接触应力越大,密封间隙为0.3 mm其动密封性能最优,而随摩擦因数的增大,接触应力总体呈上升趋势,运动速度则对于接触应力基本无影响。
The finite element model of cap-shaped slip ring type composite seals was set up by using ABAQUS.The sealing performances of the cap-shaped slip ring type composite seals under different working pressures,sealing gaps,moving speeds and friction coefficients were studied.It is found that the maximum contact stress between the piston rod and the O-ring is the key factor affecting the sealing performance under static sealing conditions.With the increase of working pressure or the decrease of sealing gap,the maximum Von Mises stress of O-rings and cap-shape ring is gradually increased,and the contact stress between surfaces is also gradually increased.Under dynamic sealing conditions,the contact stress is increased with the increase of working pressure or the decrease of sealing gap,when the sealing gap is 0.3 mm,the dynamic sealing performance of the composite seal is the optimal.With the increase of the friction coefficient,the contact stress is generally increased,while the moving speed has little effect on the contact stress.
The finite element model of cap-shaped slip ring type composite seals was set up by using ABAQUS.The sealing performances of the cap-shaped slip ring type composite seals under different working pressures,sealing gaps,moving speeds and friction coefficients were studied.It is found that the maximum contact stress between the piston rod and the O-ring is the key factor affecting the sealing performance under static sealing conditions.With the increase of working pressure or the decrease of sealing gap,the maximum Von Mises stress of O-rings and cap-shape ring is gradually increased,and the contact stress between surfaces is also gradually increased.Under dynamic sealing conditions,the contact stress is increased with the increase of working pressure or the decrease of sealing gap,when the sealing gap is 0.3 mm,the dynamic sealing performance of the composite seal is the optimal.With the increase of the friction coefficient,the contact stress is generally increased,while the moving speed has little effect on the contact stress.
引文
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[2]谭晶,杨卫民,丁玉梅,等.滑环式组合密封件的研究(I):方形同轴密封件(格来圈)的分析[J].润滑与密封,2007,32(1):53-55.TAN J,YANG W M,DING Y M,et al.The study of a sliding ring combined sea lring(I):the analysis of rectangle coaxial seal[J].Lubrication Engineering,2007,32(1):53-55.
[3]谭晶,梁军,杨卫民,等.滑环式组合密封件的研究(II):阶梯形同轴密封件(斯特圈)的有限元分析[J].润滑与密封,2007,32(7):16-19.TAN J,LIANG J,YANG W M,et al.The study of a sliding ring combined seal ring(Ⅱ):the finite element analysis of step seals(Si-Te-ring)[J].Lubrication Engineering,2007,32(7):16-19.
[4]张欢,夏毅敏,罗春雷,等.DAS组合密封圈静特性研究[J].润滑与密封,2016,41(1):120-123.ZHANG H,XIA Y M,LUO C L,et al.Static performance of DAScomposition seal ring for automobile crane leg cylinder[J].Lubrication Engineering,2016,41(1):120-123.
[5]刘清友,杨亚强,朱海燕,等.C形滑环式组合密封的密封性能[J].润滑与密封,2017,42(8):36-41.LIU Q Y,YANG Y Q,ZHU H Y,et al.Sealing performance of C-sliding ring combined seals[J].Lubrication Engineering,2017,42(8):36-41.
[6]陈家旺,郦炳杰,杨俊毅,等.齿形滑环组合密封的摩擦力矩计算[J].海洋工程,2018,36(1):91-98.CHEN J W,LI B J,YANG J Y,et al.Friction torque calculation of tooth shape combined slip ring[J].The Ocean Engineering,2018,36(1):91-98
[7]王嘉毅,霍良青,张奇峰.叶片式摆动缸组合密封性能分析与研究[J].液压与气动,2018(1):40-45.WANG J Y,HUO L Q,ZHANG Q F.Analysis of combined sealing structure of rotary vane actuator[J].Chinese Hydraulics&Pneumatics,2018(1):40-45.
[8]NIKAS G K,SAYLES R S.Modelling and optimization of composite rectangular reciprocating seals[J].Proceedings of the Institution of Mechanical Engineers,Part J.Journal of Engineering Tribology,2006,220:395-412.
[9]YONG H,WEN H,JIA W.Design and finite element analysis on self-compensating coaxial OCSR(Oblique-Cone-Slid-Ring)assembly seal device[C]//Proceedings of International Conference on Digital Manufacturing&Automation.Changcha:IEEEComputer Society,2010:469-472.
[10]成大先.机械设计手册[M].6版.北京:化学工业出版社,2016.
[11]MOONEY M.A theory of large elastic deformation[J].Journal of Applied Physics,2004,11:582-592.
[12]YU J Y,GAO J Y,LIN W,et al.Experimental study and finite element analysis of the performance of reciprocating seal in rapping device of gasifier[J].Applied Mechanics&Materials,2010,42:48-53.
[13]汤斌,薛璞,王华.车氏密封在水下电机密封装置中的有限元分析[J].机械研究与应用,2012(2):76-77.TANG B,XUE P,WANG H.Finite element analysis of Chehengde sealing applied on motor dynamic sealing device[J].Mechanical Research&Application,2012(2):76-77.