摘要
为了检验新型可重复锁紧装置在卫星发射主动段对磁悬浮飞轮的保护效果,采用三轴正弦扫频振动和随机振动模拟发射振动工况对其进行振动测试实验。提出了基于电涡流位移传感器的转子振动位移检测方法,以及基于扫描电子显微镜(scanning electron microscopy,简称SEM)和能量色散谱仪(energy dispersive spectroscopy,简称EDS)的锁紧接触面形貌分析方法,对锁紧装置的宏观、微观保护效果进行评估分析。振动测试结果表明,飞轮转子最大振动位移为45μm,小于100μm的飞轮保护间隙,锁紧装置对飞轮起到了有效的保护作用。微观分析则揭示出,锁紧接触面内存在脆性断裂和疲劳断裂两种微动磨损机制,并伴有氧化反应发生,可以采取微动抑制措施进一步改善锁紧保护效果。
To verify the protective effect of novel repeated locking device for magnetic bearing flywheel during satellite launch vibration,swept-sine vibration and random vibration in three principal axes are carried out.Two methods are used for evaluating the protective effect.Macroscopically,the eddy current displacement sensor is applied to measuring the vibration displacement between the stator and the rotor.Microscopically,the locking contact surfaces are investigated by SEM(scanning electron microscopy) and EDS(energy dispersive spectroscopy).The results show that the maximum macroscopic vibration displacement is 45 microns,less than the protect gap of 100 microns.It indicates that the novel repeated locking device can effectively carry out the locking protection function to the flywheel system.Moreover,microscopic analysis discloses that two wear mechanisms of brittle fracture and fatigue facture occurre in locking contact surfaces,with the occurrence of oxidation.The microscopic protective effect can be improved by means of suppression fretting wear.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2012年第6期926-930,1034,共5页
Journal of Vibration,Measurement & Diagnosis
基金
国家杰出青年科学基金资助项目(编号:60825305)
国家基础研究发展计划("九七三"计划)资助项目(编号:2009CB724001)
关键词
锁紧装置
磁悬浮飞轮
正弦扫频振动
随机振动
微动磨损
locking device,magnetic bearing flywheel,swept-sine vibration,random vibration,fretting wear
