Experimental Investigation of the Diagnosis of Angular Contact Ball Bearings Using Acoustic Emission Method and Empirical Mode Decomposition

IF 1.5 Q3 ENGINEERING, MECHANICAL Advances in Tribology Pub Date : 2020-09-29 DOI:10.1155/2020/8231752
Ramtin Tabatabaei, Aref Aasi, S. M. Jafari, E. Ciulli
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引用次数: 15

Abstract

Early detection of angular contact bearings, one of the important subsets of rolling element bearings (REBs), is critical for applications of high accuracy and high speed performance. In this study, acoustic emission (AE) method was applied to an experimental case with defects on angular contact bearing. AE signals were collected by AE sensors in different operating conditions. Signal to noise ratio (SNR) was calculated by kurtosis to entropy ratio (KER), then acquired signals were denoised by empirical mode decomposition (EMD) method, and optimal intrinsic mode function (IMF) was selected by the proposed method. Finally, envelope spectrum was applied to the denoised signals, and frequencies of defects were obtained in different rotating speeds, loadings, and defect sizes. For the first time, a small defect with width of 0.3 mm and loading of 475 N was detected in early stage of 0.04 KHz. Moreover, a comparison between theoretical and extracted defect frequencies suggested that our method successfully detected localized defects in both inner and outer race. Our results show promise in detecting small size defects in REBs.
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声发射法和经验模态分解在角接触球轴承故障诊断中的实验研究
角接触轴承是滚动元件轴承的重要子集之一,其早期检测对于高精度和高速性能的应用至关重要。本研究将声发射(AE)方法应用于角接触轴承缺陷的实验案例。声发射传感器在不同的工作条件下采集声发射信号。通过峰度熵比(KER)计算信噪比(SNR),然后用经验模态分解(EMD)方法对采集的信号进行去噪,并用该方法选择最优本征模态函数(IMF)。最后,将包络谱应用于去噪信号,获得了不同转速、载荷和缺陷尺寸下的缺陷频率。首次出现宽度为0.3的小缺陷 mm,载荷475 在0.04的早期阶段检测到N KHz。此外,理论缺陷频率和提取的缺陷频率之间的比较表明,我们的方法成功地检测到了内圈和外圈中的局部缺陷。我们的结果显示出在检测REB中的小尺寸缺陷方面的前景。
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来源期刊
Advances in Tribology
Advances in Tribology ENGINEERING, MECHANICAL-
CiteScore
5.00
自引率
0.00%
发文量
1
审稿时长
13 weeks
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