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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (3): 626586.doi: 10.7527/S1000-6893.2021.26586

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Design of nano-aerogel thermal insulation device and its application in Zhurong Mars Rover

XUE Shuyan1, JIA Yang2, ZHANG Bingqiang1, XIANG Yanchao1, DAI Chenghao1, WANG Xue1, ZHENG Kai1   

  1. 1. Beijing Key Laboratory of Space Thermal Control Technology, Beijing Institute of Spacecraft System Engineering, Beijing 100094, China;
    2. Beijing Institute of Spacecraft System Engineering, Beijing 100094, China
  • Received:2021-10-29 Revised:2021-11-15 Online:2022-03-15 Published:2021-12-24
  • Supported by:
    National Science and Technology Major Project

Abstract: The insulation performance of the multi-layer insulation module degrades sharply in the low temperature atmosphere on the surface of Mars, so that the need for insulation of the Mars rover cannot be satisfied.The design method of a new, efficient and lightweight nano-aerogel thermal insulation device is proposed.Nano-aerogel, which has extremely low thermal conductivity in the vacuum and Mars atmosphere, is used as the insulation material.Using the methods such as box covering and local supporting based on low thermal conductivity composite materials, filling the space between nano-aerogel and the architecture with buffer foam to filter redundancy, laying the reflector to insulate radiation heat leakage and opening vent holes, the problems in application such as mechanical property enhancement, redundancy control, radiation heat leakage insulation, and rapid air entry and exit are solved.Nano-aerogel is successfully applied in Zhurong Rover.The ground test results show that in 1 400 Pa CO2 atmosphere, the total thermal conductivity of the nano-aerogel insulation device is 0.008 0 W/(m·K) at 25℃, which effectively ensures that the temperature of the equipment inside Zhurong Mars Rover is in the allowable range with zero compensation of heating power.The total weight of the nano-aerogel thermal insulation device is 5.95 kg,only 2.5% of the total weight of Zhurong Mars Rover.

Key words: Mars rover, nano-aerogel thermal insulation device, lightweight, encapsulation, thermal insulation performance

CLC Number: