Research on Sealing Improvement Technology of A Pin Puller for Airbags
- 摘要
|
- 图/表
|
- 访问统计
|
- 参考文献
|
- 相似文献
|
- 引证文献
|
- 资源附件
|
- 文章评论
摘要:针对安全气囊用拔销器在作用过程中出现的偶发火星问题，提出了一种基于O形圈压缩率优化的密封性改进技术。通过理论分析及试验验证，确定O形圈Ⅱ的低压缩率是导致密封失效的主因。优化零部件尺寸后，将O形圈Ⅱ的下极限压缩率由1.83%提升至14.85%。利用非线性有限元分析方法，研究了O形圈的形变、Von-Mises应力和接触压力分布规律，确定了最佳密封沟槽宽度为1.40 ~1.45 mm。试验表明：改进后的密封装置在极限工况（-40~+85 ℃）及长期高温老化（107 ℃/17 d）后均无火星产生，密封可靠性显著提升。本研究为火工装置动密封设计提供了理论依据与工程参考。
Abstract:To address the sporadic sparking issue during the operation of a pin puller for airbags, a sealing improvement technology based on the optimization of O-ring compression ratio was proposed. Theoretical analysis and experimental verification reveal that the low compression ratio of O-ring II is the main cause of sealing failure. By optimizing component dimensions, the lower limit compression ratio of O-ring II is increased from 1.83% to 14.85%. Nonlinear finite element analysis was conducted to investigate the deformation, Von-Mises stress, and contact pressure distribution of the O-ring, determining the optimal sealing groove width as 1.40 ~1.45 mm. Tests demonstrate that the improved sealing device exhibits no spark generation under extreme conditions (-40~+85 ℃) or after long-term high-temperature aging (107 ℃/17 d), confirming enhanced sealing reliability. This study provides theoretical and engineering insights for dynamic sealing design in pyrotechnic devices.
var swiper = new Swiper('.swiper_xq', {
navigation: {
nextEl: '.swiper-button-next',
prevEl: '.swiper-button-prev',
},
});
$(function(){
$('img').bigic();
});
jQuery(".slideTxtBox").slide({ trigger: "click" });
