永磁涡流传动调速设备支承座动力学分析及结构改进

Dynamic analysis and structure improvement of support seat of permanent magnetic eddy current transmission speed regulation device

永磁涡流传动设备中支承座的共振现象将会影响到设备整机的运行性能,以某型号永磁涡流传动设备中支承座为研究对象,对支承座进行了三维建模,通过三维建模软件与ANSYS Workbench系统间的模型互动,对支承座进行模态及谐响应仿真分析,获得了支承座的前4阶固有模态频率、振型和扫频带宽为0~900 Hz的结构动态特性。仿真表明:激励频率在586 Hz时,轴承座前端面X轴向共振位移达到了峰值;为提高支承座第1阶模态频率和改善其安全可靠性,对原支承座约束与结构参数进行了优化改进,仿真表明:总质量在小于10%增幅的情况下,提高了支承座前4阶固有模态频率值,且其第1阶模态频率提高了56.6%,扫频900 Hz时X轴向共振最大位移仅为0.07 mm,有效地改善了支承座的动力学性能,其研究结果为永磁涡流传动设备支承座的优化设计提供了参考借鉴。

The resonance of the support seat in the permanent magnet eddy current transmission device will affect the operating performance of the equipment. A support seat in permanent magnet eddy current device is taken as research subject, the support seat 3 D modeling is established. Through the transfer of data between modeling software and ANSYS Workbench, the modal analysis and harmonic response analysis are worked out, the first four natural frequencies, vibration modes and dynamic bandwidth for 0-900 Hz structure characteristics of the support seat are obtained. Simulation results show that the X axial resonance displacement of the front end face of the bearing pedestal reaches the maximum with the excitation frequency is 586 Hz;In order to improve the support seat of the first order modal frequency and safety performance, the constrained original support seat structure parameters are optimized. Research results shown that the total quality in less than 10% growth, the support seat of the first four natural frequencies, and the first order modal frequency is increased by 56.6%, and when the maximum displacement frequency 900 Hz, X axial vibration is only 0.07 mm, the dynamic performance of the support seat is improved effectively,the results provide reference for optimization design of the support seat in permanent magnet eddy current transmission device.