一种磁悬转子-轴承系统的动力学分析  

Dynamic Analysis of a Magnetically Suspended Rotor-bearing System

作　　者：丁建刚 郝守忠 苏金胜 Ding Jiangang;Hao Shouzhong;Su Jinsheng(Shaanxi Yulin Energy Group Coal Import and Export Co.,Ltd.,Yulin,Shaanxi 719000,China)

机构地区：[1]陕西榆林能源集团煤炭进出口有限公司,陕西榆林719000

出　　处：《机电工程技术》2025年第4期128-130,196,共4页Mechanical & Electrical Engineering Technology

摘　　要：以应用于气流纺的磁悬浮纺杯转子-轴承系统为例,建立了纺杯转子的动力学模型,基于Riccati传递矩阵法,对转子在轴承刚度为5×10^(6)N/m时的3阶临界转速以及临界转速随轴承刚度的变化情况进行了计算分析,基于ANSYS13.0对上述纺杯转子-轴承系统进行了动力学仿真分析,并将仿真结果与Riccati传递矩阵法计算结果进行了对比,两者相对误差在5%以内。采用HP35670A频率响应分析仪分别对自由状态以及悬浮时的纺杯转子进行了模态试验,测出了转子在两种状态下的固有频率。整个转子-轴承系统的高速运转试验对转子在不同转速下磁浮轴承处的位移进行了统计分析,以达到对理论计算、仿真分析结果进一步验证的目的。结果表明:所建立的转子-轴承系统动力学模型是合理的,对柔性转子的设计与分析具有一定的参考意义。Taking the magnetic levitation spinning cup rotor bearing system applied to air flow spinning as an example,the dynamic model of maglev spinning cup is established.Based on Riccati transfer matrix method,the third order critical speed of the rotor when the bearing stiffness is 5×10^(6)N/m and the change of the critical speed with the bearing stiffness are calculated and analyzed.Based on ANSYS13.0,the dynamic simulation analysis of the spinning cup rotor-bearing system above is carried out.The simulation results are compared with those calculated by Riccati transfer matrix method,and the relative error is less than 5%.By means of HP35670A frequency response analyzer,the modal tests of spinning cup rotor in free state and suspension state are carried out,and the natural frequencies of rotor in two states are measured.The high speed test of the whole rotor-bearing system is carried out to analyze the rotor displacement at the maglev bearing at different speed,so as to further verify the theoretical calculation and simulation analysis results.The results show that the established rotorbearing system dynamics model is reasonable and has certain reference significance for the design and analysis of flexible rotors.

关 键 词：磁悬浮纺杯转子 Riccati传递矩阵法 有限元法 试验模态分析 

分 类 号：TH133[机械工程—机械制造及自动化]