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磁悬浮飞轮用新型可重复内锁紧机构
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国家杰出青年科学基金资助项目(60825305);国家973重点基础研究发展计划资助项目(2009CB724002)


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    摘要:

    为减小磁悬浮飞轮整机的体积质量和降低发射成本,提出了一种基于锥面锁紧和摩擦自锁的可重复内锁紧机构,并介绍了其结构、工作原理。根据发射振动条件对锁紧机构进行静力学分析,得到锁紧机构各项锁紧参数。在此基础上,通过选择锁台位置和锥面约束面积,采用有限元法对锁紧状态下的飞轮转子进行动力学模态计算。根据设计结果研制了一套锁紧机构,并通过正弦扫频振动和随机振动模拟卫星发射振动工况,检验锁紧机构对磁悬浮飞轮系统的保护效果。结果显示,振动试验中飞轮系统无明显共振发生,飞轮定、转子间最大相对振动位移为30 μm,远小于飞轮保护间隙200 μm,表明锁紧机构能够对飞轮系统实施有效保护。

    Abstract:

    In order to reduce the volume, weight and launch cost of magnetic bearing flywheel as a whole, a repeatable inner locking device based on conical surface to lock and friction selflocking to keep locking was presented. Its composition and operating principle were introduced. According to launch vibration condition, the static analysis of locking device was carried out and the locking parameters were obtained. Upon this basis, by choosing locking step position and conical constraint area, the dynamics modals of flywheel rotor under locking state were calculated by finite element method (FEM). According to design results, a locking device was developed, and vibration working condition of satellite launching was simulated by sweptsine vibration and random vibration, so as to verify the protection effects on the magnetic bearing flywheel by the locking device. The result shows that, no resonance occurs during testing of the flywheel, and the maximum relative vibration displacement between stator and rotor is at 30 μm far less than the protection gap of 200 μm, which indicates the locking device can effectively protect flywheel system.

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刘强,曹建树,房建成,徐宝东.磁悬浮飞轮用新型可重复内锁紧机构[J].机床与液压,2014,42(23):51-54.
.[J]. Machine Tool & Hydraulics,2014,42(23):51-54

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  • 在线发布日期: 2015-06-17
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