摘要
在电主轴转子系统中,轴承与轴承座主要通过间隙配合方式连接,在轴承热变形的影响下间隙配合量会产生非均匀性变化。为了探究轴承配合间隙变化对转子系统振动特性的影响,创建考虑间隙配合的电主轴转子系统动力学模型。利用时域响应和傅里叶频谱分析系统的振动特性,结合分叉图和庞加莱映射分析轴承间隙配合对转子系统稳定性的影响。最后通过搭建电主轴振动测试平台,对仿真结果进行验证。结果表明:在不同转速下,转子系统的振动随着轴承配合间隙的增大而增强,系统稳定性随着配合间隙的增大从周期运动过渡到拟周期运动最后进入混沌状态;间隙为5μm时,试验结果与仿真结果的振动误差率约为4.18%,验证了模型的准确性。
In the motorized spindle rotor system,the bearing and the pedestal are mainly connected by clearance fit,and the amount of clearance fit will change non-uniformly under the influence of the thermal deformation of the bearing.In order to investigate the influence of the bearing fit clearance change on the vibration characteristics of the rotor system,the dynamics model of the motorized spindle rotor system with consideration of the clearance fit was created.The vibration characteristics of the system were analyzed by using the time domain response and Fourier spectrum,and the influence of bearing clearance fit on the stability of the rotor system was analyzed by combining the bifurcation diagram and Poncalai mapping.Finally,the simulation results were verified by setting up the motorized spindle vibration test bench.The results show that the vibration of the rotor system is enhanced with the increase of the bearing clearance at different rotational speeds,and the stability of the system will be transitioned from the periodic motion to the proposed periodic motion and then into the chaotic state with the increase of the clearance.When the gap is 5μm,the vibration error between the test results and the simulation results is about 4.18%,which verifies the accuracy of the model.
作者
张珂
丁馨怡
王展
王子男
ZHANG Ke;DING Xinyi;WANG Zhan;WANG Zinan(School of Mechanical Engineering,Shenyang Jianzhu University,Shenyang Liaoning 110168,China)
出处
《机床与液压》
北大核心
2024年第15期172-177,共6页
Machine Tool & Hydraulics
基金
国家自然科学基金面上项目(52175107)
国家自然科学基金青年科学基金项目(52205117)。
关键词
电主轴转子系统
间隙配合
非线性动力学
振动特性
motorized spindle rotor system
clearance fit
nonlinear dynamics
vibration characteristics
