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清华大学学报(自然科学版)  2016, Vol. 56 Issue (2): 167-170    DOI: 10.16511/j.cnki.qhdxxb.2016.22.005
  机械工程 本期目录 | 过刊浏览 | 高级检索 |
石墨垫片密封界面的力学特性
贾晓红1, 陈华明1, 励行根2, 王玉明1
1. 清华大学 摩擦学国家重点实验室, 北京 100084;
2. 宁波天生密封件有限公司, 宁波 315302
Mechanical properties of a graphite gasket sealing interface
JIA Xiaohong1, CHEN Huaming1, LI Xinggen2, WANG Yuming1
1. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China;
2. Ningbo Tiansheng Sealing Packing Co., Ltd, Ningbo 315302, China
全文: PDF(2188 KB)  
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摘要 石墨垫片是一种广泛使用的静密封, 其良好的密封性能取决于密封界面的力学特性。为了研究石墨垫片密封界面的力学特性, 该文基于现有密封实验台结构和材料弹塑性, 建立了垫片系统有限元模型, 模拟实验台加卸载工况, 仿真研究垫片的力学特性。实验测量了垫片压缩回弹曲线。仿真结果给出了垫片在加载和卸载过程中接触压力、变形和压缩回弹曲线的变化情况, 与实验测量结果吻合, 验证了仿真方法的正确性, 进一步从理论上阐明了此类垫片实现高接触刚度、高动载稳定性和高安装重复性的工作机理。
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贾晓红
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关键词 柔性石墨复合垫片石墨垫片密封界面有限元仿真弹塑性    
Abstract:Graphite gaskets are widely used static seals. This study examines the mechanical properties on the seal interface which is significant to the sealing performance. The study uses finite element simulations based on a test rig structure and elastic-plastic material properties. The compression-resilience curve is measured in the same test rig. The simulations show the changes in the contact pressure and deformation distribution during loading and unloading. The simulated compression-resilience curves agree with the measured data to validate the finite element model. The results explain the sealing mechanism of high contact stiffness, load stability, and installation repeatability for this kind of gasket.
Key wordsflexible graphite composite gasket    graphite gasket    sealing interface    finite element simulation    elastic-plastic
收稿日期: 2013-11-13      出版日期: 2016-02-15
ZTFLH:  TB42  
基金资助:国家科技重大专项(2014ZX06002007)
作者简介: 贾晓红(1972—), 女(汉), 山西, 副教授。E-mail: jiaxh@tsinghua.edu.cn
引用本文:   
贾晓红, 陈华明, 励行根, 王玉明. 石墨垫片密封界面的力学特性[J]. 清华大学学报(自然科学版), 2016, 56(2): 167-170.
JIA Xiaohong, CHEN Huaming, LI Xinggen, WANG Yuming. Mechanical properties of a graphite gasket sealing interface. Journal of Tsinghua University(Science and Technology), 2016, 56(2): 167-170.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2016.22.005  或          http://jst.tsinghuajournals.com/CN/Y2016/V56/I2/167
  图1 柔性石墨复合垫片
  图2 垫片系统有限元模型
  图3 垫片综合性能试验机示意图
  图4 加载过程中法兰与垫片密封面接触压力的变化特征
  图5 石墨垫片中环变形
  图6 垫片压缩回弹曲线仿真结果与实验测量的对比
  图7 不同载荷下法兰密封垫片的连接刚度变化
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