期刊
CHINESE JOURNAL OF AERONAUTICS
卷 32, 期 7, 页码 1727-1732出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cja.2018.08.017
关键词
Lattice structure; Lightweight; Selective laser melting (SLM); Spacecraft; Thermal controller
资金
- Beijing Institute of Spacecraft System Engineering
- China Association for Science and Technology [2017QNRC001, 2016QNRC001]
Thermal controllers equipped with phase-change materials are widely used for maintaining the moderate temperatures of various electric devices used in spacecraft. Yet, the structures of amounts of thermal controllers add up to such a large value that restricts the employment of scientific devices due to the limit of rocket capacity. A lightweight structure of phase-change thermal controllers has been one of the main focuses of spacecraft design engineering. In this work, we design a lightweight phase-change thermal controller structure based on lattice cells. The structure is manufactured entirely with AlSi 10Mg by direct metal laser melting. The dimensions of the structure are 230 mm x 170 mm x 15 mm, and the mass is 190 g, which is 60% lighter than most traditional structures (500-600 g) with the same dimensions. The 3D-printed structure can reduce the risk of leakage at soldering manufacture by a welding process. Whether the strength of the designed structure is sufficient is determined through mechanical analysis and experiments. Thermal test results show that the thermal capacity of the lattice-based thermal controller is increased by 50% compared to that of traditional controllers with the same volume. (C) 2018 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd.
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