| 低热负载红外探测器渐变壁厚冷指结构设计 |
| 投稿时间：2024-09-26 修订日期：2024-10-17 点此下载全文 |
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| 中文摘要:随着制冷型红外探测器研制进度的发展,对杜瓦结构提出了低漏热的需求。为设计低漏热的杜瓦结构,本文通过力学仿真与传导热负载理论分析,提出了一种低热负载红外探测器渐变壁厚冷指结构设计,并且探究渐变壁厚冷指外径渐变位置对力学可靠性与传导漏热的影响。结果表明,若为大量级的振动条件,渐变壁厚冷指外径渐变位置可适当上移,增强结构稳定性；若为小量级的振动条件,外径渐变位置可适当下移,满足力学可靠性前提下,进一步降低热负载,并进行组件优化验证,该结构在保证力学可靠性的前提下,可降低杜瓦静态热负载15%-18%。 |
| 中文关键词:红外探测器 冷指 传导热负载 |
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| Design of low thermal load infrared detector with gradient wall thickness cold finger structure |
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| Abstract:With the development of refrigerated infrared detector, the Dewar structure is required for low heat leakage. In order to design Dewar structure with low heat leakage, this paper proposes a low heat load infrared detector with graded wall thickness cold finger structure through mechanical simulation and conduction heat load theory analysis. The influence of the gradient position of cold finger outer diameter on mechanical reliability and conduction heat leakage was investigated. The results show that under a large number of vibration conditions, the gradient position of the outer diameter of the cold finger with gradient wall thickness can be shifted up appropriately to enhance the stability of the structure. If the vibration condition is low, the gradient position of the outer diameter can be moved down appropriately, and the thermal load can be further reduced under the premise of mechanical reliability, and the component optimization verification is carried out. The structure can reduce the static thermal load of Dewar by 15%-18% under the premise of ensuring mechanical reliability. |
| keywords:infrared detector Cold finger Conduction heat load |
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