螺母预紧力对滚珠丝杠副振动特性的影响

发布时间：2018-11-22 06:12

【摘要】：基于滚珠丝杠副可靠性试验台研究了滚珠丝杠副预紧力的变化与测得的振动信号的关系。首先,介绍了滚珠丝杠副可靠性试验台的预紧力加载装置;接着,对预紧力加载装置进行动力学建模,搭建振动信号测试平台,采集不同预紧力水平下的振动信号;最后,通过振动信号的频域分析和预紧力加载装置的动力学分析,发现预紧力的变化可以通过两个参数进行监测:振动信号峰值频率的偏移和峰值频率振动幅值的变化。实验结果和动力学分析的结论十分吻合:随着滚珠丝杠副预紧力的增大,峰值频率不断增大,峰值频率的振动幅值也不断增大。研究结论发现,可以通过监测振动信号峰值频率的偏移和峰值频率的振动幅值来监测预紧力的变化,这为检测滚珠丝杠副的健康水平提供了一种新的研究方法,这对于促进滚珠丝杠副进给驱动系统的发展具有重大意义。
[Abstract]:Based on the reliability test bed of ball screw pair, the relationship between the change of pretightening force and the measured vibration signal is studied. Firstly, the preload force loading device of the reliability test rig of ball screw is introduced, and then, the dynamic modeling of the preload device is carried out, the vibration signal testing platform is built, and the vibration signal is collected under different pretightening force levels. Finally, through the frequency domain analysis of the vibration signal and the dynamic analysis of the preload device, it is found that the change of the preload force can be monitored by two parameters: the deviation of the peak frequency of the vibration signal and the change of the amplitude of the vibration of the peak frequency. The experimental results are in good agreement with the conclusion of the dynamic analysis: with the increase of the pre-tightening force of the ball screw, the peak frequency increases and the vibration amplitude of the peak frequency increases. It is found that the change of pretightening force can be monitored by monitoring the deviation of peak frequency of vibration signal and the amplitude of vibration of peak frequency, which provides a new research method for detecting the health level of ball screw pair. It is of great significance to promote the development of ball screw feed drive system.
【作者单位】：南京理工大学机械工程学院;
【基金】：国家科技重大专项(2016ZX04004007)
【分类号】：TH132

【相似文献】