中国空间科学技术（中英文）2025，Vol.45Issue(3)：77-88,12.DOI:10.16708/j.cnki.1000-758X.2025.0040
基于记忆合金的天体样本轨道转移密封方法
Sealing method for celestial sample orbit transfer based on shape memory alloy
刘峥励 1罗熠晨 1刘洲 2于茂华 2周学 1洪昊岑 3张斌1
作者信息
- 1. 浙江大学 机械工程学院,杭州 310030||浙江大学 流体动力基础件与机电系统全国重点实验室,杭州 310058
- 2. 上海宇航系统工程研究所,上海 201109
- 3. 浙江大学 高端装备研究院,杭州 310014
- 折叠
摘要
Abstract
This study addresses the sealing challenges in planetary soil sampling.It aims to design a radial compression sealing device using a shape memory alloy(SMA)triggered by temperature changes.The device ensures sample integrity and reduces the need for high axial force,optimizing the sealing process.A microscopic leakage model,based on Roth's law,is used to evaluate the impact of structural and external factors on leakage rates.Two SMA sheet configurations are analyzed,with simulations showing that the sharp-angle design enhances sealing reliability.The device uses polyimide heating films for resistive heating,achieving sealing by radially compressing the canister.Theoretical leakage rates are predicted,and the energy consumption is assessed through thermal simulations.When the SMA sheet's diameter deviation from the inner wall is under 0.20mm,the leakage rate reaches 10-6 Pa·m3/s.Tests show an average compression stress of 160MPa,with measured leakage rates consistent with predictions.The total energy consumption is 2137.7J,demonstrating the device's high sealing efficiency for orbital sample transfer.The SMA-based device effectively seals without requiring significant axial force.The sharp-angle configuration particularly enhances performance.This device offers a reliable,energy-efficient solution for planetary sample orbit transfer sealing with broad potential applications.关键词
星壤采样/密封装置/记忆合金/漏率模型/密封漏率Key words
star soil sampling/sealing device/shape memory alloy/leakage rate model/sealing leakage rate引用本文复制引用
刘峥励,罗熠晨,刘洲,于茂华,周学,洪昊岑,张斌..基于记忆合金的天体样本轨道转移密封方法[J].中国空间科学技术（中英文）,2025,45(3):77-88,12.
