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针对磁悬浮轴承系统中通常需要一套保护轴承作为磁悬浮轴承失效后转子的临时支撑,转子跌落后将产生的巨大冲击和振动这一问题,提出将弹性环分别安装于转子和保护轴承外圈两种不同位置来缓冲转子跌落所带来的冲击和振动.针对两种位置建立转子跌落的动力学模型,并对所建立的模型进行数值仿真计算,主要分析对比了安装位置不同对转子跌落后碰撞力、轴心轨迹和保护轴承内圈转速的影响.在理论分析的基础上,进行了相应的试验研究.仿真和试验结果表明:将弹性环安装于转子上更能有效地减小转子跌落后的振动幅度和冲击力.
For a bearing system of magnetic suspension, a set of protection bearings is usually required as a temporary support for the rotor after the failure of the magnetic suspension bearing, and a huge impact and vibration will be generated after the rotor falls. The elastic rings are respectively installed on the rotor and the outer ring of the protection bearing Different positions to buffer the impact and vibration caused by the rotor drop.The dynamic model of the rotor drop is established for the two positions and the numerical simulation of the established model is carried out.The main analysis and comparison of the different post- , The trajectory of the shaft and the inner speed of the inner ring of the bearing are also studied.Based on the theoretical analysis, the corresponding experimental studies are carried out.The simulation and experimental results show that the installation of the elastic ring on the rotor can effectively reduce the rotor Vibration amplitude and impact.