Experimental and analytical studies on behavior of shape memory alloy-based knife-edge seal system for extraterrestrial soil sample return mission

Wang, Jin; Li, Detian; Zhang, Ruguang; Wang, Yongjun; Qing, Gang; Liu, Kun; Xie, Yuanhua; He, Chengdan

doi:10.1016/j.vacuum.2024.113048

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2024

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“…These fins press into the inner wall of the tube, forming a hermetic seal [26,27]. Wang et al [28] proposed an SMA-based sealing system. When subjected to controlled heating, the SMA component contracts in diameter.…”

Section: Introductionmentioning

confidence: 99%

Design of an Automatic Sealing Mechanism for Extraterrestrial Sample-Collecting Robot

Mu,

Yuan,

et al. 2024

Aerospace

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Returning extraterrestrial samples to Earth for analysis is crucial for planetary geological research and resource utilization. However, during their return journey, these samples undergo significant environmental changes, such as varying pressure, temperature, impact, and vibration. Hence, a dependable sealing technique that preserves sample integrity without requiring high-powered tools is necessary. This article aims to develop an automatic sealing system for collecting extraterrestrial samples, conducting parametric design and mechanical analysis on two types of proposed sealing structures with minimal sealing force as the benchmark. Additionally, the system will undergo validation through sealing and leakage detection experiments. An automated sealing system, capable of storing samples in multiple sampling tubes, is assembled for the extraterrestrial sampling device.

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Section: Introductionmentioning

confidence: 99%