| 摘要: |
| 星箭锁紧装置是卫星与火箭连接的关键机构。装置中的V形卡块在预紧力施加过程中，易发生偏斜，使得星箭分离配合面接触不均匀，产生应力集中，导致星箭分离面黏着磨损。研究了星箭锁紧装置中的V形卡块和上下端框的铝合金摩擦副在不同影响因素下摩擦系数的变化，探究了温度、正压力以及铝合金表面粗糙度对界面黏着和黏滞摩擦系数的影响。研究结果表明，硫酸阳极化处理的2A14T6-2A14T6比较适合作为摩擦副材料，在加工和锁紧过程中，应合理控制其粗糙度、温度和正压力，以避免黏着磨损。 |
| 关键词: 2A14T6铝合金 2219铝合金 界面黏着 星箭分离 |
| DOI： |
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| 基金项目:火箭创新基金自主研发项目（ZH2022011） |
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| Study on the Influencing Factors of the Viscous Friction Coefficient in the Satellite and Rocket Locking Device |
| LI Yinbo,CAO Jingle,CHEN Youwei,XIE Guoxin |
| (State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing 100084, China;Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China) |
| Abstract: |
| The satellite and rocket locking device is the key mechanism used for the connecting and locking satellites and rockets. The V-shaped clamp block in the device is prone to deflection during the application of preload force, which makes the contact of the satellite and rocket separation mating surface uneven and produces stress concentration, leading to the adhesive wear of the satellite and rocket separation surface. In this paper, the changes of the friction coefficient of the aluminum alloy friction vice of the V-shaped block and the upper and lower end frames of the satellite and rocket locking device under different influencing factors are investigated, and the influences of the temperature, positive pressure, and the roughness of the aluminum alloy surface on the interfacial adhesion and viscous friction coefficients are explored. The results show that sulfuric acid anodized 2A14T6-2A14T6 is more suitable as the friction pair materials, and roughness, temperature and positive pressure should be reasonably controlled during processing and locking to avoid adhesive wear. |
| Key words: 2A14T6 aluminum alloy 2219 aluminum alloy Interface adhesion Separation of satellite and rocket |