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- W74147613 abstract "This work presents initial results from a new approach to condition monitoring of rail axle bearings, in particular some early-stage failures.Background: premature failure of rail axle bearings causes a significant increase in train operating costs and can impact on train safety. Rail axle bearings have an anticipated service life; however, some bearings do not achieve this. A new approach to degradation diagnostics is now in use on Southeastern / Bombardier trains and provides real-time vibration condition monitoring. Each independent wireless sensor unit bolts to a wheel bearing housing. The units are self-powered by vibration harvesting. This emerging methodology has been made possible by the decreasing power budget of sensor and wireless technologies. Methods: in this initial study, real ex-situ examples of failures of bearings have been examined. The damaged regions of the bearings are examined using a suite of non-destructive techniques including optical and scanning electron microscopy, computed tomography (CT) and surface profilometry as well as traditional metallographic sectioning methods. Discussion: a new on-board condition monitoring system has made possible the examination of the onset of in-service bearing degradation, allowing identification well in advance of catastrophic destruction of the evidence. Initial results indicate that the vibration sensors are correctly identifying failing bearings. CT damage maps are allowing targeted metallographic sectioning of the samples. Correlation between vibration data and the bearing damage parameters will improve diagnostic accuracy and ultimately improve train safety" @default.
- W74147613 created "2016-06-24" @default.
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- W74147613 date "2014-07-07" @default.
- W74147613 modified "2023-09-27" @default.
- W74147613 title "Sixth international conference of engineering failure analysis" @default.
- W74147613 hasPublicationYear "2014" @default.
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