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| 标 题： |
Analysis of the Dynamic Characteristics of a Gear-Rotor-Bearing System with External Excitation
带外部激励的齿轮-转子-轴承系统的动态特性分析 |
| 作 者： |
Na, Risu
Jia, Kaifa
Miao, Shujing
Zhang, Weiguo
Zhang, Quan |
| 关键词： |
rotor dynamics [转子动力学]
external incentives [ 外部激励]
finite element method [ 有限元法]
bearing [ 轴承]
gear [ 齿轮]
MODEL [ 型号] |
| 出版年： |
2023 |
| 期刊名： |
Journal of Mechanical Engineering
机械工程杂志 |
| 年卷期： |
2023, vol.69, no.1/2 |
| 摘 要： |
The dynamic response of the rotor system in a ring die granulator is complex and difficult to solve when it operates under joint external, support and gear mesh forces. To solve this problem, a finite element method and extrusion theory was applied in this study to develop a dynamic coupling model for a hollow overhung rotor with external load excitation. A Newmark-beta numerical integration method was used to solve for the dynamic response of the overhung rotor under multiple excitation forces. The results included time-domain response diagrams, frequency-domain response diagrams, phase diagrams, Poincare section diagrams, and bifurcation diagrams. The model and the method were verified by testing a ring die granulator. On this basis, the dynamic response of the system is predicted according to the influence of different parameters. As the bearing support distance increased, the roller eccentricity decreased, the bearing clearance decreased, the response of the rotor system was significantly optimized, and the system tended to stabilize gradually. Therefore, this paper provides a theoretical basis and experimental verification for the optimization of a pelleting machine transmission structure.
环模造粒机转子系统的动态响应复杂，当其在外部载荷、支撑力和齿轮啮合力共同作用下运行时，难以求解。为解决这一问题，本研究采用有限元方法与挤出理论，针对带外部载荷激励的空心悬臂转子建立了一个动态耦合模型。利用Newmark-β数值积分法求解了悬臂转子在多向激励下的动态响应。结果包括时域响应图、频域响应图、相位图、庞加莱截面图以及分岔图。该模型与方法通过环模造粒机的实际测试得到验证。在此基础上，根据不同参数的影响预测了系统动态响应。随着轴承支撑距离增加、滚轮偏心距减小、轴承间隙减小，转子系统的响应显著优化，系统趋于逐渐稳定。因此，本文为颗粒机传动结构的优化提供了理论依据和实验验证。 |
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