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This article discusses the improvement of the electrical component of the wear model of the elements of contact pairs of current collector devices under conditions of high-speed movement. The histograms of the electrical wear of contact elements obtained by calculation using the existing and improved mathematical models are presented. Analysis of the obtained histograms allows us to conclude that the calculation accuracy is improved according to an improved mathematical model by taking into account the influence of the aerodynamic effects of the air flow and the speed of the rolling stock.

Now the problem of development of the high-speed and high-speed movement on the main railway transport that is connected by increase of traffic safety of trains and ensuring reliable work of contact suspension brackets and current collectors of an electrorolling stock is actual. For increase of reliable work of current collectors there are some ways one of which is creation of the safety devices which are built in a design of current collectors and providing their automatic lowering in emergencies. In Omsk State Transport University the current collector equipped with safety devices of new generation on the basis of the operated pneumatic devices and providing protection at failure or the increased wear of contact elements, and also breakages of a runner is developed; at rise on height of more admissible at departure of an electrorolling stock for the sign «End of a Contact Suspension Bracket» or break of contact wires; at blows and arrivals on obstacles in a contact suspension bracket. For control and management of operation of safety devices the protective pneumatic contour located on the basis of a current collector in the special case is used. At operation of one of safety devices there is a depressurization of the pneumohighway of a protective contour therefore pressure of compressed air the drive of a current collector decreases and it falls under the influence of own gravity. Restoration of a current collector possibly only in the conditions of depot or point of maintenance of locomotives. Calculation of characteristics and parameters of the device of protection at blows and arrivals on obstacles in a contact suspension bracket needs to be carried out by the given technique for zones of normal, dangerous and emergency work. For an assessment of operability of safety devices and definition of their main technical indicators and parameters in laboratory of OSTU the shock and oscillatory complex is developed for research of interaction of a current collector with a contact network.

The article describes a mathematical model of electro-mechanical devices wear contact pairs current collection of electric transport in conditions as close to real operating conditions. Synthesis of models made in two directions: model the mechanical load and model of electric current flow in sliding contact. The mathematical model also allows to take into account the thermal processes oc-curring in sliding contact by passing an electric current through a sliding contact. Are compared the results of calculations and experimental studies of wear of contact pairs of different materials. Experimental studies were performed on a dedicated test bench installation created in Omsk State Transport University. Relative error between calculation and experiment is not more than 6 %.

In accordance with the long-term development program of JSC Russian Railways until 2025, it is planned to increase the level of economic connectivity of the territory of Russia by expanding the network of high-speed and high-speed transportation. This involves not only the construction of new high-speed highways, but also the modernization of the structures of individual components of rolling stock, as well as the introduction of energy and resource-saving technologies. The use of contact elements with an extended service life is one of the most economical and least costly ways to ensure reliable, economical and environmentally friendly transmission of electricity to rolling stock. An increase in the service life of the current collector element can be achieved, among other things, by reducing wear by the correct selection of contact pair elements, both from the point of view of their tribocompatibility and the ability to ensure high quality current collection. A methodology for conducting experimental studies of contact pairs of current collection devices has been developed and successfully tested at OSTU, which involves bench tests for each pair of contact materials “contact insert - contact wire” in order to determine their optimal combination to reduce wear and increase resource. Estimation of the amount of wear and prediction of the life of the elements of the contact pair is carried out including using mathematical models. However, the use of existing models for predicting wear under conditions of high-speed movement is not accurate enough due to the lack of consideration of the aerodynamic effects and the speed of the rolling stock on current collection processes. This article discusses the improvement of the mechanical component of the wear model of the elements of contact pairs of current collection devices in high-speed conditions. The graphs of the mechanical wear of the contact elements are obtained experimentally and as a result of calculation by a mathematical model. The analysis of the graphs allows us to conclude that it is possible to use an improved mathematical model for modeling the mechanical component of the wear process of the elements of contact pairs with a maximum error value of not more than 5 %.