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中文摘要：
采用正弦扫频振动和随机振动模拟卫星发射振动工况,对磁悬浮飞轮锁紧装置在不同锁紧力下的微动行为进行研究,并利用电涡流位移传感器测量定、转子在锁紧接触面处的微动位移,发现锁紧面处存在包含切向和径向的复合微动.实验后,采用扫描电子显微镜对3种锁紧接触副（1Cr18Ni9Ti/GCr15,渗氮1Cr18Ni9Ti/GCr15和GCr15/GCr15）的锁紧表面进行分析.结果表明：锁紧力从200 N增至300 N时,最大微动位移从60μm降至8μm,相应的微动位移最大振幅从25μm降至4μm,使得切向微动从滑移区变化至部分滑移区,从而降低了切向微动磨损程度.而增加接触刚度或选择相似接触体可减小微滑发生机率,避免径向微动损伤.两者共同作用,抑制了锁紧面内的复合微动损伤发生.
英文摘要：
To study the fretting behaviors of locking device for magnetically suspended flywheel under different locking forces,the swept-sine vibration and random vibration were carried out to simulate the vibration environment during launch.The fretting displacements between stator and rotor measured by eddy current displacement sensor indicate the composite fretting regime including tangential and radial fretting in locking surface.After tests,the surfaces of three contacts including 1Cr18Ni9Ti/GCr15,nitrided 1Cr18Ni9Ti/GCr15 and GCr15/GCr15 were analyzed using scanning electronic microscopy.The results show that with the increase of locking force from 200 N to 300 N,the maximum fretting displacement decreased from 60 μm to 8 μm and its corresponding amplitude decreased from 25 μm to 4 μm.This results in tangential fretting transition from slip regime to partial slip regime and reduced the fretting damage.In addition,the micro-slip and radial fretting damage can be avoided by increasing contact stiffness and choosing similar contact bodies.The two fretting resistances can inhibit composite fretting damage in locking surface.
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