Finite Element Analysis of the Dynamic Sealing Characteristics for O-ring
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摘要: 利用软件ABAQUS建立了O形圈的轴对称有限元模型,分析了其在往复动密封中的密封性能,并对其不同工况下的力学性能进行了研究。结果表明:往复动密封中,O形圈主密封面最大接触应力与Von Mises应力的作用位置随运动方向的变化而改变,且大小随时间呈波动变化;速度小于0.25 m/s时,速度对摩擦力与剪切应力几乎无影响;随着摩擦系数、介质压力的增大,摩擦力与剪切应力对速度的敏感性变高;介质压力与摩擦系数对摩擦力与剪切应力影响较大,剪切应力与摩擦力呈同步变化;密封外行程Von Mises应力与剪切应力均大于内行程,更易引起疲劳与剪切破坏;预压缩率增加到一定值时,O形圈在动密封中所受的摩擦力急剧上升,动密封中预压缩率不宜过大。Abstract: An axisymmetric finite element model for O-ring was built based on the soft-ware Abaqus, and its seal performance in reciprocating dynamic seals and its mechanical properties under different conditions were analyzed. The results show that the biggest contact stress on the primary seal face and Von Mises stress's acting position change with the direction of movement and the size fluctuated over time. When reciprocating speed is less than 0.25 m/s, the friction force and shear stress are almost not affected by speed. With the friction coefficient and medium presure increased, friction force and shear stress become higher sensitive for speed. Medium presure and friction coefficient have a great impact on friction force and shear stress. Friction force and shear stress change simultaneously. The Von Mises stress and shear stress in outer journey are bigger than the inner journey, and outer journey is more likely to cause fatigue and shear failure. The friction force of O-ring in dynamic seal suffered a sharp rise when compression ratio get to a certain value, so too large compression ratio should not be adopted in dynamic seal.
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Key words:
- ABAQUS /
- compression ratio /
- constitutive models /
- fatigue of materials /
- finite element method
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[1] 吴琼,索双富,廖传军,等.丁腈橡胶O形圈往复密封性能试验研究[J].润滑与密封,2012,37(2):29-33 Wu Q, Suo S F, Liao C J, et al. Experimental tudy of reciprocating sealing performance of nitrile rubber O-ring[J]. Lubricating Engineering,2012,37(2):29-33 (in Chinese) [2] X·阿弗鲁辛科.橡胶密封[M].北京:机械工业出版社,1983 X. Ephruszinko.Rubber seal[M].Beijing:Machinery Industry Press,1983 (in Chinese) [3] 陈志,高钰,董榕,等.机械密封橡胶O形圈密封性能的有限元分析[J].四川大学学报,2011,43(5):234-239 Chen Z, Gao Y, Dong R, et al. Finite element analysis of sealing characteristics of the rubber O-ring for a mechanical seal[J]. Journal of Sichuan University,2011,43(5):234-239 (in Chinese) [4] 韩传军,张杰,黄岗,等.往复密封中星型密封圈的密封性能分析[J].润滑与密封,2012,37(9):28-36 Han C J, Zhang J, Huang G, et al. Seal performance analysis of a star sealing ring in reciprocating seal[J]. Lubricating Engineering,2012,37(9):28-33 (in Chinese) [5] 周志鸿,张康雷,李静,等.O形橡胶密封圈应力与接触压力的有限元分析[J].润滑与密封,2006,31(4):86-89 Zhou Z H, Zhang K L, Li J, et al. Finite element analysis of stress and contact pressure on the rubber sealing O-ring[J]. Lubrication Engineering,2006,31(4):86-89 (in Chinese) [6] 杨春明,谢禹钧.基于 Ansys的橡胶O形密封圈的密封性能有限元分析[J].弹性体,2010,20(6):49-52 Yang C M, Xie Y J. Ansys analysis of the sealing performance of rubber O-sealing ring[J]. Elastomerics,2010,20(6):49-52 (in Chinese) [7] 赵腾伦.ABAQUS6.6在机械工程中的应用[M].北京:中国水利水电出版社,2007 Zhao T L.ABAQUS6.6 application in mechanical engineering[M]. Beijing:China Water Power Press,2007 (in Chinese) [8] 刘印文,刘振华,刘涌.橡胶密封制品实用加工技术[M].北京:化学工业出版社,2002 Liu Y W, Liu Z H, Liu Y. Rubber sealing products practical processing technology[M].Beijing:Chemical Industry Press,2002 (in Chinese) [9] 中国机械工程学会设备与维修工程分会.密封使用与维修问答[M].北京:机械工业出版社,2005 Chinese mechanical engineering society of equipment and maintenance engineering branch.Seal use and maintenance answers[M]. Beijing:Machinery Industry Press,2005 (in Chinese) [10] 陈国定,Haiser H,Haas W, et al. O形密封圈的有限元力学分析[J].机械科学与技术,2000,19(5):740-743 Chen G D, Haiser H, Haas W, et al. Analysis of O-ring seals using the finite element method[J]. Mechanical Science and Technology,2000,19(5):740-743 (in Chinese) [11] A.N.詹特.橡胶工程-如何设计橡胶配件[M].北京:化学工业出版社,2002 Gent A N. Engineering with rubber-how to design rubber components[M]. Beijing:Chemical Industry Press,2002 (in Chinese)
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