Statistical Analysis Of The Damages Of Pantograph/Catenary Friction Materials And Study On Their Preventive Measures

In today’s world, the electrified railway transportation gains a rapid development. The electric locomotive is a traction power of electrified railway. A cate nary/panto graph system consists of a catenary and pantographs of an electric locomotive, which transmit the power on the ground to the moving electric locomotive.The pantograph/catenary system performance directly affects the quality of power transmission of electric locomotives and its regular operation, and the wear of pantograph/catenary friction materials is an important factor determining the pantograph system performance, work quality and service life. Whether the pantograph/catenary system is good or bad directly affects the quality of power transmission of electric locomotives, thereby it affects the operation of the whole train.Through the statistical analysis of the damages of the pantograph/catenary friction materials, we can find evolutions of the wear of these materials from application. Based on the statistical analysis, we can obtain an understanding of the wear performances of the pantograph/catenary friction materials, especially, where and why the severe wear and abrasion happen in the pantograph/catenary system from the theoretical point of view. Based on the analysis result combined with applications, we can propose some measures to prevent severe wear of pantograph/catenary friction materials for engineering applications.In the thesis, the author collected a lot of wear data of pantograph/catenary friction materials from the application spots including the wear of the contact wire from Qianan to Baoguanying to Lulong to Shuangwang and the wear of the contact strip in the same section from Oct.2012 to Jan.2013. The statistical analysis of these wear data is conducted according to their types and application parameters combined with the material wear theory. It allows the reader to clearly understand the wear situation of the contact wire or pantograph strip combined with the local specific application parameters. Based on the statistical analysis result, a wear timetable of different locomotive pantograph strips is obtained. The author extracts key data and omit miscellaneous data. The statistical analysis and research results is not only beneficial to the further analysis, but also convenient for the actual engineering application.According to statistical analysis of the wear data in application sites combined with practical application parameters, the author finds the places where the severe wear of the catenary and pantograph materials are located at the lifting or descending spots of locomotive pantographs, the electrical connection clamp and the joint conversion of anchor section, etc. There are security risks in these spots where the local contact wire and pantograph strip are badly worn. The author analyzes potential problems of catenary hard spots and possible harm to pantograph strips, and proposes appropriate preventive measures according to the actual conditions. In addition, the author discusses the encountered conditions of pantograph strips in actual applications, at the same time introduces the harm caused by mistake operations and summarizes the ways to reduce these mistake operations.