MATEC Web Conf.
Volume 116, 20176th International Scientific Conference “Reliability and Durability of Railway Transport Engineering Structures and Buildings” (Transbud-2017)
|Number of page(s)||7|
|Section||Railways and Highways, Subways and Industrial Transport|
|Published online||10 July 2017|
Study of the predominant defect development in rails of underground systems after preventive grinding and lubrication
1 Ukrainian State University of Railway Transport, Department of Construction, track and handling machines, Feuerbach sq., 7, Kharkov, Ukraine, 61050
2 Ukrainian State University of Railway Transport, Department of Track and track facilities, Feuerbach sq., 7, Kharkov, Ukraine, 61050
* Corresponding author: firstname.lastname@example.org
In order to determine the method of contact surface treatment and to define the rational surface roughness in the wheel/rail contact for the minimal growth rate of contact fatigue defects the program of experiments in operational conditions was developed. On the basis of the results and calculations the coefficients of regression equations, which describe dependencies of the wear rate on the parameters of the contact surface treatment in real operational conditions were obtained. Besides, the diagrams of dependencies of the friction coefficient on the roughness of railhead contact surface of the high rails with and without lubrication, when laid in curves of underground systems, were built. The experiments conducted in operational conditions of Kharkiv Metro revealed the influence of roughness of the railhead side surface of the high rails in curves on the contact fatigue defect development after preventive grinding and lubrication. According to the results of the experiments it was established that the rail preventive grinding with simultaneous lubrication led to slower contact fatigue defect development in rails of underground systems. The rational roughness of the railhead side surface of the high rails in curves after preventive grinding, which led to the minimal rate of defect development, was defined.
© The Authors, published by EDP Sciences, 2017
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