| 引用本文: | 王莉娜,孙恒超,孙伟,綦磊,孙立臣,孟冬辉.考虑应力松弛效应的球头-锥面密封性能分析[J].哈尔滨工业大学学报,2020,52(1):156.DOI:10.11918/201901186 |
| WANG Li’na,SUN Hengchao,SUN Wei,QI Lei,SUN Lichen,MENG Donghui.Performance analysis of globe-cone sealing considering stress relaxation effect[J].Journal of Harbin Institute of Technology,2020,52(1):156.DOI:10.11918/201901186 |
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| 摘要: |
| 建立了考虑应力松弛效应的球头-锥面密封有限元模型,并采用这一模型获得螺母残余预紧应力及球头-锥面间接触应力随蠕变时间的变化规律. 在此基础上,依据Roth提出的泄漏模型推导出考虑应力松弛效应下球头-锥面密封泄漏率的计算公式,并采用这一公式获得不同工况参数下考虑应力-松弛效应的球头-锥面密封泄漏率随蠕变时间的变化规律. 本文在球头-锥面密封性能分析中实现了应力松弛效应影响的嵌入,这一研究不仅有助于球头-锥面密封性能分析技术在其工程分析设计中的实用化,也在一定程度上对球头-锥面密封性能研究理论体系和方法有所完善. |
| 关键词: 球头-锥面密封 卫星推进系统 应力松弛效应 泄漏率 残余预紧应力 接触压力 |
| DOI：10.11918/201901186 |
| 分类号:TH122 |
| 文献标识码:A |
| 基金项目:国家自然科学联合基金(51905039) |
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| Performance analysis of globe-cone sealing considering stress relaxation effect |
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WANG Li’na1,SUN Hengchao2,SUN Wei1,QI Lei1,SUN Lichen1,MENG Donghui1
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（1. Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China; 2. Institute of Telecommunication Satellite, China Academy of Space Technology, Beijing 100094, China)
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| Abstract: |
| When globe-cone sealing has long storage or working requirement, it is necessary to consider the effect of stress relaxation on the globe-cone seal performance. Based on this, a finite element model of globe-cone sealing considering stress relaxation is established, and the law of the nut residual preload force and the contact stress between globe and cone is obtained with increasing creep time by this model. Then the calculating formulas of globe-cone seal leakage rate are presented by the leakage model which is presented by Roth considering stress relaxation effect, and the law of leakage rate is obtained with increasing creep time under different working parameters. The effect of stress relaxation on globe-cone seal performance is analyzed in the paper, which would be practical in the engineering design, and also improve the theory system and method about globe-cone seal performance analysis in a certain extent. |
| Key words: globe-cone sealing satellite propulsion system stress relaxation effect leakage rate residual preload force contact pressure |
