摘要
建立了柴油机气门油封结构有限元二维轴对称模型,研究了在气门工作条件下油封的动态密封性能,同时分析了油封不同结构参数对油封密封性能的影响。仿真分析表明,油封密封性能随着凸轮转角的变化而发生明显变化,气门运动速度波动对油封密封性能有很大影响,在气门运动换向时刻油封嘴唇口发生剧烈运动。通过仿真得到了油封结构参数与油封动态密封性能之间的关系,为油封设计工作提供了重要依据。
Two-dimension axisymmetric finite element models of valve oil seal structure were built.The dynamic sealing performance of valve oil seal under valve working condition was investigated,and the influence of seal different structure parameters on dynamic sealing performance was analyzed.It shows that the sealing performance changes with the time greatly,and is affected by the valve velocity fluctuations,and the sealing lip has a strenuous exercise while the valve changing directions.The relationship between the dynamic sealing performance and geometric design parameters is studied through simulation,which is the important basis for oil seal design.
引文
[1]Lifeng Xu,Robert W McCabe,Carolyn P.Hubbard.Impact of Oil Consumption Modes and Pathways on Oil-Derived Catalyst Deposits[C].SAE Paper,2007-01-1072.
[2]朱艳峰,王红橡胶材料硬化的结构模型与有限元分析[J].武汉工程大学学报,2008,30(1):34-45.
[3]Allan Mason Jones,Alan Fern.Further Finite Element Analysis of Reciprocating Valve Stem seals[C].SAE Paper,1999-01-0885.
[4]Juergen Netzer,Karl Heinz Maus.Improvements of Valve Stem Seals to Meet Future Emission Requirements[C].SAE Paper,980581.
[5]Philip C Hadinata,Lyndon Scott Stephens.Soft Elastohydrodynamic Analysis of Radial Lip Seals With Deterministic Microasperities on the Shaft[J].Journal of Tribology,2007,129(4):851-859.
[6]A Maoui,M Hajjam,D Bonneau.Numerical Analysis of Thermoelastohydrodynamic Behavior of Elastomer Radial Lip Seals[J].Journal of Tribology,2008,130(1):504-603.
[7]M Thomine,J M Degrange,G Vigier,et al.Study of Relations Between Viscoelasticity and Tribological Behaviour of Filed Elastomer for Lip Seal Application[J].Tribology International,2007,40(2):405-411.
[8]Goich Mori,Takashi Umeki,Yoshinobu Ueno,et al.Engine Valve Stem Seal,Oil Leakage Control Technology and Performance[C].SAE Paper,960208.