Analysis and Research on Abnormal Wear of High-Speed EMU Grounding Brush
A certain type of High-speed Railway grounding device friction pair is far lower than the expected 1.2 million kilometres,The service life of the material with different brush wear conditions of composition and its microstructure are analyzed,finding that the material composition of different brush and organizational structure,internal organization of distribution is relatively uniform.The wear process was analyzed by observing the morphology of the wear surface,and the discharge between the friction pairs was found to be an important cause of wear acceleration.The performance test results of the same group of brush loading springs show that the difference of the performance of the loading springs will lead to the vibration of the brush structure under the condition of high-speed wear,which will cause the instantaneous separation of the friction pair and lead to discharge,which is the main reason for the abnormal accelerated wear of brush materials.
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