| 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 |
摘要:
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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。 | |||
| 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 words：flexible graphite composite gasketgraphite gasketsealing interfacefinite element simulationelastic-plastic | |||
| 收稿日期: 2013-11-13 出版日期: 2016-02-17 | |||
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| 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 |
图表:
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| 图1 柔性石墨复合垫片 |
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| 图2 垫片系统有限元模型 |
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| 图3 垫片综合性能试验机示意图 |
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| 图4 加载过程中法兰与垫片密封面接触压力的变化特征 |
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| 图5 石墨垫片中环变形 |
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| 图6 垫片压缩回弹曲线仿真结果与实验测量的对比 |
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| 图7 不同载荷下法兰密封垫片的连接刚度变化 |
参考文献:
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