滚动轴承微小故障的细化包络分析方法研究

发布时间：2018-05-27 23:31

本文选题：滚动轴承 + 故障诊断　；参考：《河南科技大学》2011年硕士论文

【摘要】：近年来,机械设备故障诊断技术无论在国内还是国外都得到了较大的发展,在国民生产中越来越起到举足轻重的作用。滚动轴承是旋转机械设备中的重要零件之一,它的运行状态往往直接影响到与之相关联的轴以及安装在轴上的齿轮及至整台设备的性能,其缺陷通常会使设备产生异常的振动和噪声,严重时会引起设备的损坏、生产的停止以及重大机械事故。因此,开展滚动轴承的状态检测和故障诊断,尤其是滚动轴承早期微小故障的诊断有很大的必要性。本文首先阐述了当前故障诊断和轴承故障诊断基本情况,接着分析总结了滚动轴承典型故障产生的机理、常见失效形式和监测诊断方法,然后详细讨论了振动信号处理的一般方法,以及功率谱、包络解调和希尔伯特变换的基本原理,最后以滚动轴承6202为研究对象,通过DBV I型数字化轴承振动测量仪测得滚动轴承早期故障振动信号,根据滚动轴承缺陷信号的特点,融合了小波变换、Hilbert变换、包络谱细化分析等特点,提出了先将采集的轴承振动信号进行小波变换滤波重构,并经希尔伯特变换得到包络信号,最后把包络谱进行细化分析得到振动频谱图,依据该频谱图判别轴承故障的方法,该方法完成了整个诊断过程,有效地实现了滚动轴承的故障诊断,通过实验可以证明该方法是行之有效的。本文成功实现滚动轴承典型故障的诊断工作,为保证滚动轴承在旋转机械中正常使用提供了有力依据,为机械故障的判定、诊断提供了一种思路和方法。
[Abstract]:In recent years , the fault diagnosis technology of mechanical equipment has been developed in both domestic and abroad , and plays an important role in the national production . Rolling bearings are one of the important parts in rotary machinery equipment . The running state of the rolling bearing is often directly affected to the performance of the shaft and the gear installed on the shaft to the whole equipment . The defects of the rolling bearing often cause the equipment to be damaged , the production stops and the major mechanical accidents are caused . Therefore , the state detection and fault diagnosis of the rolling bearing are carried out , especially the diagnosis of the early minor faults of the rolling bearing is very necessary .

This paper first expounds the basic situation of fault diagnosis and fault diagnosis of bearing , then analyzes the mechanism , common failure mode and monitoring and diagnosis method of the typical fault of rolling bearing , and then discusses the general method of vibration signal processing , and the basic principle of power spectrum , envelope demodulation and Hilbert transform .

In this paper , the diagnosis of typical faults of rolling bearing is successfully realized , which provides a powerful basis for ensuring the normal use of the rolling bearing in the rotating machinery , and provides a way of thinking and method for the determination and diagnosis of the mechanical failure .
【学位授予单位】：河南科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH165.3

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