A comparative experimental study on the use of acoustic emission and vibration analysis for bearing defect identification and estimation of defect size
A comparative experimental study on the use of acoustic emission and vibration analysis for bearing defect identification and estimation of defect size
复制标题
DOI：
10.1016/j.ymssp.2004.10.013
复制
发表时间：
2006-10-01
影响因子：
8.4
通讯作者：
Mba, David
中科院分区：
文献类型：
--
作者：
Al-Ghamd, Abdullah M.;Mba, David
滚动轴承的振动监测可能是旋转机械中最成熟的诊断技术。作为一种辅助诊断工具，声发射（AE）在轴承诊断中的应用正在取得进展，然而，声发射技术成功应用的局限性部分是由于难以处理、解释和分类所获得的数据。此外，轴承损坏的程度也没有得到诊断。本文报道的实验研究集中在应用声发射技术来识别径向载荷轴承上缺陷的存在和大小。设计了一个实验试验台，使不同尺寸的缺陷可以播种到测试轴承的外圈上。给出了在一定转速和载荷条件下声发射和振动分析的比较。此外，研究了由播种缺陷引起的声发射活动的主要来源。与振动分析相比，声发射可以更早地发现故障，提高识别能力。此外，声发射技术还提供了缺陷尺寸的指示，允许用户监测轴承上的退化率；振动分析无法实现。(c) 2005 Elsevier Ltd版权所有。
Vibration monitoring of rolling element bearings is probably the most established diagnostic technique for rotating machinery. The application of acoustic emission (AE) for bearing diagnosis is gaining ground as a complementary diagnostic tool, however, limitations in the successful application of the AE technique have been partly due to the difficulty in processing, interpreting and classifying the acquired data. Furthermore, the extent of bearing damage has eluded the diagnostician. The experimental investigation reported in this paper was centred on the application of the AE technique for identifying the presence and size of a defect on a radially loaded bearing. An experimental test rig was designed such that defects of varying sizes could be seeded onto the outer race of a test bearing. Comparisons between AE and vibration analysis over a range of speed and load conditions are presented. In addition, the primary source of AE activity from seeded defects is investigated. It is concluded that AE offers earlier fault detection and improved identification capabilities than vibration analysis. Furthermore, the AE technique also provided an indication of the defect size, allowing the user to monitor the rate of degradation on the bearing; unachievable with vibration analysis. (c) 2005 Elsevier Ltd. All rights reserved.