一种用于电磁轴承特性可控的弹性备用轴承  

A Controllable Flexible Backup Bearing for Active Magnetic Bearings

作　　者：祝长生[1] 

机构地区：[1]浙江大学电气工程学院,浙江杭州310027

出　　处：《航空学报》2010年第10期2087-2092,共6页Acta Aeronautica et Astronautica Sinica

基　　金：国家"863"计划(2006AA05Z201);国家自然科学基金(10772160);浙江省自然科学基金(R104129)

摘　　要：为了提高电磁轴承备用轴承的性能,基于动力特性可控的径向电涡流阻尼器、弹性支撑以及滚动型或衬套型备用轴承提出了一种动力特性可控的弹性备用轴承新结构。介绍了这种新型备用轴承的结构和工作原理,在不同的转速和转子不平衡量下测量了电磁轴承失效后转子坠落在新型弹性备用轴承上的瞬态响应,分析了新型备用轴承对转子坠落在备用轴承上的瞬态冲击响应的抑制作用。结果表明:这种新型弹性备用轴承不仅具有结构简单、无工作介质、动力特性易于进行控制等特点,而且还能够显著减小电磁轴承失效后转子坠落在备用轴承上的瞬态冲击响应,使转子的振动很快得以衰减,减小了转子对备用轴承的冲击作用,是一种具有良好发展和应用前景的主动电磁轴承备用轴承结构。A novel controllable flexible backup bearing for active magnetic bearings is presented which is constructed on the basis of the controllable radial eddy current damper,flexible support and rolling element or bushing type.The basic structure and the operating principle of the novel backup bearing are introduced.The transient responses of the rotor system dropping in the bearing are measured after the active magnetic bearing fails at different rotating speeds and rotor unbalances.The effectiveness of the novel backup bearing is analysed for improving the transient impact dynamic characteristics of the rotor dropping on the backup bearing after the active magnetic bearing failure.It is found that the novel controllable flexible backup bearing not only possesses such advantages as simple structure,no need for working fluid and easily controllable dynamic behavior,but also can significantly reduce the transient impact responses of the rotor system and the impact effect during dropping on the backup bearing after the active magnetic bearing failure.It is a useful prospective backup bearing for active magnetic bearings.

关 键 词：主动电磁轴承 备用轴承 电涡流阻尼器 转子 坠落 

分 类 号：TH113[机械工程—机械设计及理论]