界面尺寸对分瓣式磁性液体密封性能的影响及有限元分析

发布时间：2018-10-14 12:08

【摘要】：分瓣式磁性液体密封是本实验室研究的一项新密封技术,胶接面的密封是分瓣式磁性液体密封失效的主要因素之一。本文基于Volkersen剪滞模型理论,采用有限元分析的方法,对受法向和切向联合载荷作用下的胶涂层内部应力进行了模拟计算。分析了不同微坑深度、微坑宽度以及微坑间距对密封性能的影响。结果表明:当粗糙度增大时,处于波峰位置的Mises应力相应减小,波谷位置的Mises应力相应增大。当减小微坑宽度时,曲线曲率明显增大,更容易出现应力集中,密封性能相应越差。边界处的波形对τxy和σy的影响很大,边界处处于波峰形状更有利于密封性能。微坑间距的变化对密封性能的影响不会起到主导作用。模拟结果能为不同密封装置的基底密封性能的评价以及界面失效临界应力的预估提供参考。
[Abstract]:Split magnetic liquid seal is a new sealing technology studied in our laboratory. Sealing of glued surface is one of the main factors of failure of split magnetic liquid seal. Based on the theory of Volkersen shear lag model, the internal stress of rubber coating under combined normal and tangential loads is simulated and calculated by finite element method. The effects of different depth of micropits, width of micropits and spacing of micropits on sealing performance were analyzed. The results show that the Mises stress at the peak position decreases and the Mises stress at the trough position increases when the roughness increases. When the width of the microcrater is reduced, the curvature of the curve increases obviously, the stress concentration appears more easily, and the sealing performance is worse. The waveform at the boundary has a great influence on 蟿 xy and 蟽 y, and the shape of the wave peak at the boundary is more favorable to the sealing performance. The change of the distance between the micropits will not play a leading role in the sealing performance. The simulation results can provide a reference for the evaluation of the performance of the substrate seal and the prediction of the critical stress of the interface failure.
【作者单位】：北京交通大学机械与电子控制工程学院;石家庄学院计算机学院;
【基金】：教育部创新团队发展计划——载运工具关键设备的磁性液体密封研究(IRT13046)
【分类号】：TB42

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