转子系统永磁变刚度抑振及吸振研究

发布时间：2018-02-04 04:21

本文关键词： 永久磁铁变刚度机构转子系统振动抑制动力吸振器　出处：《机械工程学报》2017年09期 　论文类型：期刊论文

【摘要】：针对旋转机械往往存在振动过大的问题,提出了采用永久磁铁构成的变刚度机构实现转子系统抑振和吸振。首先应用电磁学理论推导了永磁变刚度机构的刚度公式并进行分析;其次将永磁变刚度机构应用于转子系统的振动抑制并进行了试验研究;最后设计了含永磁变刚度机构的旋转机械动力吸振器,并进行了转子-吸振器系统的动力学仿真和试验研究。结果表明,所提出的永磁变刚度机构具有非接触、刚度值大、容许相对位移大、线性度好等优点,且可以通过动静磁铁间距调整实现刚度变化;该机构对转子系统的振动抑制和吸振都有良好的效果。
[Abstract]:In view of rotating machinery, there is often a problem of excessive vibration. A variable stiffness mechanism composed of permanent magnet is proposed to suppress vibration and absorb vibration of rotor system. Firstly, the stiffness formula of permanent magnet variable stiffness mechanism is derived and analyzed by electromagnetic theory. Secondly, the permanent magnet variable stiffness mechanism is applied to the vibration suppression of rotor system and the experimental study is carried out. Finally, the dynamic vibration absorber of rotating machinery with permanent magnet variable stiffness mechanism is designed, and the dynamic simulation and experimental study of the rotor vibration absorber system are carried out. The results show that the proposed permanent magnet variable stiffness mechanism is non-contact. The stiffness value is large, the relative displacement is large, the linearity is good, and the stiffness can be changed by adjusting the distance between static and static magnets. The mechanism has good effect on vibration suppression and vibration absorption of rotor system.
【作者单位】：东北大学机械工程与自动化学院;
【基金】：国家重点基础研究发展计划(973计划,2012CB026006) 国家自然科学基金(51475085)资助项目
【分类号】：TH113
【正文快照】： 0前言1旋转机械在运行过程中,其核心部件—转子系统由于不平衡等原因会产生振动,强烈的振动会对旋转机械的稳定运行带来不良影响,因此研究转子系统的振动控制问题非常重要[1]。目前对转子系统的振动控制手段可分为两类:减振和吸振。减振即通过改变转子系统的阻尼、刚度或施加/

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