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自紧式V形金属密封特性及悬臂结构影响

张大伟 雷征 闫方琦 田冲 王晨浩 李智军

张大伟, 雷征, 闫方琦, 田冲, 王晨浩, 李智军. 自紧式V形金属密封特性及悬臂结构影响[J]. 机械科学与技术, 2023, 42(7): 1114-1119. doi: 10.13433/j.cnki.1003-8728.20220079
引用本文: 张大伟, 雷征, 闫方琦, 田冲, 王晨浩, 李智军. 自紧式V形金属密封特性及悬臂结构影响[J]. 机械科学与技术, 2023, 42(7): 1114-1119. doi: 10.13433/j.cnki.1003-8728.20220079
ZHANG Dawei, LEI Zheng, YAN Fangqi, TIAN Chong, WANG Chenhao, LI Zhijun. Sealing Characteristics and Influence of Aantilever Geometry on Pressure-actuated V-shaped Metal Seal[J]. Mechanical Science and Technology for Aerospace Engineering, 2023, 42(7): 1114-1119. doi: 10.13433/j.cnki.1003-8728.20220079
Citation: ZHANG Dawei, LEI Zheng, YAN Fangqi, TIAN Chong, WANG Chenhao, LI Zhijun. Sealing Characteristics and Influence of Aantilever Geometry on Pressure-actuated V-shaped Metal Seal[J]. Mechanical Science and Technology for Aerospace Engineering, 2023, 42(7): 1114-1119. doi: 10.13433/j.cnki.1003-8728.20220079

自紧式V形金属密封特性及悬臂结构影响

doi: 10.13433/j.cnki.1003-8728.20220079
详细信息
    作者简介:

    张大伟(1982-), 教授, 博士生导师, 博士, 研究方向为机械结构设计及优化、智能成形工艺及装备等, zhangdawei2000@mail.xjtu.edu.cn

  • 中图分类号: V431;TB42

Sealing Characteristics and Influence of Aantilever Geometry on Pressure-actuated V-shaped Metal Seal

  • 摘要: 自紧式V形金属密封在液体火箭发动机中有广泛应用,然而不同使用环境下的结构形式、几何参数、材料选用等变化繁多。基于工况和空间约束设计了一种V形金属密封结构,并基于ABAQUS平台,建立V形金属密封装配-承压-卸载-拆卸全工作过程有限元模型,研究工作全过程的密封特性和可控几何参数影响。结果表明:密封唇高温承压后屈服变形并持续增加属塑性变形,密封悬臂处塑性变形先增加后保持不变,具备良好自紧特性,拆卸分离后密封唇处无明显局部压痕、密封件回弹率为88.4%,可保证密封性能和重复使用性;回弹率随两悬臂间内张角α和悬臂内外侧张角β增加而增加, β对接触压强和回弹率影响大于α;通过几何参数优化,可进一步提高回弹率。
  • 图  1  自紧式V形金属密封结构及工作全过程有限元模型

    Figure  1.  The pressure-actuated V-shaped metal seal structure and full working process finite element model

    图  2  自紧式V形金属密封工作参数

    Figure  2.  Pressure-actuated V-shaped metal seal working parameters

    图  3  不同工作阶段的等效应力分布

    Figure  3.  Equivalent stress distribution in different working stages

    图  4  不同工作阶段的密封比压

    Figure  4.  Sealing-specific pressure in different working stages

    图  5  不同工作阶段的等效应变分布

    Figure  5.  Equivalent strain distribution in different working stages

    图  6  内张角α对应力、应变和接触压强的影响

    Figure  6.  The influence of the inner wedge angle α on stress, strain, and contact pressure

    图  7  几何参数对回弹率的影响

    Figure  7.  The influence of geometric parameters on degree of rebound

    图  8  张角β对应力、应变和接触压强的影响

    Figure  8.  The influence of the wedge angle β on stress, strain, and contact pressure

    表  1  材料的力学性能参数

    Table  1.   The mechanical performance parameters of the material

    参数 GH4169 GH4202
    弹性模量/GPa 194.2 216
    泊松比 0.29 0.3
    屈服应力/MPa 1 035 49
    抗拉强度/MPa 1 270 830
    延伸率/% 12 16
    下载: 导出CSV
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  • 收稿日期:  2021-08-18
  • 刊出日期:  2023-07-25

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