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In article the possibilities of decrease in energy consumption on draft at the movement of electric trains in the conditions of a flat profile of West Siberian Railway due to shutdown of traction section of an electric train and rational distribution of time of the course in all direction of the movement are considered. During the calculating and creation of schedules of the train for site is used an analytical method of the solution of the differential equation of the movement of the train. For the analysis of optimum schedules of the train at each stage of their modeling an inspection of calculations which allows to guarantee reliability of the received results is car-ried out. For definition of potential opportunities of decrease in energy consumption on draft at traffic control of an electric train the concrete trip of an electric train of ED4M along a route Omsk - Irtyshskaya is analysed. Settlement schedules of an electric train are provided in the considered trip, and also with shutdown of one traction section. Average is defined by standard means of system of computer modeling on the way the electric train speed, dispersion of speed on the way, energy consumption. The received size of energy consumption for draft with the disconnected traction section is much less than energy consumption on a real trip. Rational distribution of time of the course of the electric train in all direction of movement from a condition of preserving time of its arrival also allows to reduce an electric power expense on draft by the terminal station. Based on consumption data of the electric power in general possible economy of energy costs on draft due to application of the offered methods is determined by Omsk TCh-31 depot.

The article includes research results of substantiation 3ТЕ10М diеsel locomotive`s movement work parameters on a hilly-mountainous direction of railway while moving freight trains with stops and without any stops on the spaces stations and separating points

The article includes research results of analyzing and evaluating 3ТЕ10М diesel locomotive`s efficiency on a hilly-mountainous direction Marokand-Navoi of Uzbekistan railways while hauling freight trains with and without stopping on through stations (division points).Main parameters of basic movement work of researched UzTE16M3 diesel locomotives are shown as tabled values and graphic dependencies,also equations of organizing necessary calculations mentioned above in accepted range of mass variation are marked here.

The introduced results of the investigation by valuation of efficiency the employment of the locomotives of the diesel (the diesel locomotives 3TE10M, UzTE16M3) and of the electrical (the electric locomotives 3VL80S) tractions in the plainly direction of railway track by the method of averagin design values. Modified average significances main indicator move working of the investigations of the diesel locomotives 3TE10M, UzTE16M3 of the evaluation mind numeral and table facts, and also graphic arts dependences, representative oneself arithmetical mean value with taking into account of the movement goods trains without any stops and with stops on the spaces stations, passing - tracks and divides points, which have received in the result to uses of the traction calculation for different conditions organization of the goods movement. Designate equations for organization calculation values mention exponents in the accepted range changing of the masses trains

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.

The results of the investigations on the study condition movement of high-speed trains with active and passive systems inclination of body of the carriage in the curved directions of railway track with the registrations of the organizes in the movement and exploitation of the electric trains «Afrosiyob» in the direction Tashkent - Samarkand of the Uzbek railway track are presented are presented.

The results of the investigations on the evaluation of efficiency use of the diesel locomotives UzTE16M4 in the mountainous direction Kumkurgan - Tashguzar of the Uzbek railways track by of the movement goods trains with stops and without any stops on the spaces station are presented.

Investigation of instantaneous and average velocities of train movement, their properties and their application, including calculation of speed coefficients and movement time. Determination of influence of the movement speed and its restrictions, stops and delays onto travel time losses and traction energy consumptions of loaded and empty trains. Time and energy saving estimation due to the application of regenerative braking on the electric locomotive. Development of the recommendations for increasing average speed, decreasing travel time and energy consumption of freight trains.

The aim of the work is to study and evaluate the energy efficiency of regenerative braking of an electric locomotive when a freight train is moving at an unsteady and steady speed, to determine the degree of influence on the return of electricity of various factors, first of all, the mass of the train, the speed of movement, resistance to movement, the steepness of the slope of the track profile, driving conditions, the efficiency of traction motors and the needs of an electric locomotive own needs. Also, the purpose of the study is to develop recommendations for improving the energy efficiency of regenerative braking of an electric freight locomotive. Methods used: mathematical analysis, methods of traction calculations and energy balance. The equations of the energy balance of the movement of a freight train and its components in the mode of regenerative braking are considered, which make it possible to identify the main factors affecting the return of electricity at unsteady and steady speed. The calculated dependences of the return of electricity during regenerative braking of an electric locomotive with loaded and empty freight trains consisting of 71 four-axle cars, when moving with reduced speed and constant speed on sections of track with slopes of different steepness, characterizing the influence of individual factors on the return of electricity during regenerative braking of an electric locomotive, are obtained. It is shown that the specific return of electricity during regenerative braking of an electric locomotive with a loaded freight train weighing 7100 tons when moving with a decrease in speed on a track section with a zero profile is approximately the same as with a steady speed of movement on descents with a steepness of 6 ...7 ‰. The specific return of electricity during regenerative braking of an electric locomotive with an empty freight train weighing 1775 tons when moving with a decrease in speed on a track section with a zero profile is approximately the same as with a steady speed on descents with a steepness of 11 ‰ or more. The conditions under which the maximum return of electricity is achieved during regenerative braking of electric freight locomotives are determined. Recommendations have been developed to improve the energy efficiency of regenerative braking of electric freight locomotives.

Possibilities of expansion of settle of typical elementary links of mechanical oscillation systems are considered. As examples of links for transformation of movement the screw and level mechanisms are offered. Introduction of new links is equivalent of elementary links with transfer function of differential of second order. The method for definition of parameters of dynamical absorbtions of oscillation are offered.

This article presents dynamic model for numerical researches of oscillations of the main frame of an electric locomotive taking into account the impact of longitudinal efforts arising in the automatic coupler.

The purpose of the work is to assess the energy efficiency of recuperative braking of a passenger DC electric locomotive when a train is moving at an unsteady and steady speed, to determine the degree of influence of the speed of movement and electric heating of passenger cars on the return of electricity during recuperative braking of an electric locomotive, to develop recommendations for improving the energy efficiency of passenger DC electric locomotives. The following methods were used: comparative analysis, methods of traction calculations, linear regression analysis, energy balance method. The equations of the energy balance of the movement of a passenger train and its components are considered in the mode of regenerative braking, allowing to identify the main factors affecting the return of electricity. The dependences of the return of electricity during regenerative braking, allowing to evaluate the influence of the train running mode and electric heating of passenger cars on the return of electricity during regenerative braking of an electric locomotive, are obtained. Developed recommendations to reduce the energy consumption of passenger trains. The conditions under which it is possible to increase the return of electricity during regenerative braking of passenger electric locomotives are determined. The developed proposals will allow increasing the energy efficiency of passenger DC electric locomotives.

The way of diagnosing allowing without removal and dismantling of a nozzle on the working engine to define the chart of movement of a needle of a spray by means of the sensor of pressure, established in a cavity over a nozzle needle is offered, to estimate the valid corner of an advancing of injection of fuel and a technical condition of a nozzle of the diesel.

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 %.

The purpose of this article is to analyze the voltage drop in the contact network caused by poor-quality operation of an alternating current electric locomotive when passing heavy trains. Heavy-haul traffic is considered today as a valid and necessary tool for increasing weight norms and increasing the throughput of railway sections. The article provides statistics on the passage of heavy and connected trains on the Krasnoyarsk railway for 2019 and 2020. For the effective use of heavy traffic, it is necessary to solve a number of problems, one of which is to reduce the voltage in the overhead network when passing heavy trains, this negatively affects the speed of the train along the haul, the conditions for cooling the power equipment of the electric locomotive deteriorate, etc. As a result of the analysis of the operation of the thyristor rectifier-inverter converter, a number of disadvantages were revealed. The reason for the low power factor of the electric locomotive lies in the use of an outdated element base based on thyristors, their closure is carried out only in the next voltage half-cycle, long-term switching and a large opening angle of thyristors leads to a significant reactive current in the contact network. Based on the analysis the voltage losses at the current collector, it was concluded that it is necessary to reduce the duration of the switching process of the arms of the rectifier-inverter converter, in which a short circuit occurs in the secondary winding of the traction transformer. An alternative version of the converter based on fully controlled semiconductor devices - IGBT transistors is proposed. The ability to open and close at any time of such elements allows you to minimize the phase angle and increase the power factor. Due to the almost instantaneous switching of transistors, the distortion in the contact network is minimized.

The paper discusses the use of automated electricity metering systems to control parameters of the traction power supply system in terms of speed and heavy movements. As the main control system offered an automated system for monitoring energy efficiency of transportation process. The results of testing of the system considered in the measurement example, the boundaries of the active area of railways DC Shalya - Podvoloshnaya Sverdlovsk railway.

The article discusses the traction parameters of a new generation electric locomotive. The existing schemes of service areas by electric locomotives and locomotive brigades on the studied railway test site are presented. A comparison is made of the main parameters of DC and single-phase AC electric locomotives, the operation of which is currently organized on sections of movement with trains of calculated mass in the long-term mode of thrust on the climbs of various steepness. The scheme of the proposed organization of operation of a double power locomotive and locomotive crews is presented. Calculated traction parameters of a two-system electric locomotive, taking into account the plan and profile of the track in the proposed areas of operation, specific resistivity to the movement of the locomotive and the composition of the train at the estimated speed, specific accelerating and decelerating forces of the train. When two-system electric locomotives are put into operation, it will be possible to reduce the fleet of locomotives in operation, the number of traction arms due to their lengthening and the number of locomotive change points, reduce the transit time of freight trains, increase technical and local speed, average daily mileage and average daily performance of the locomotive, reduce power consumption per traction . The operation of such electric locomotives contributes to the development of polygon technologies for managing the transportation process, improving the quantitative and qualitative indicators of various railway enterprises.

Analysis of failures of axlebox units of bogies for freight cars in the network of JSC «Russian Railways» for the period from 2010 to 2012, disadvantages of this node known construction trucks of the car of model 18-100. Defined vertical, horizontal and longitudinal loads acting on the buchs site. Mathematical modeling of the dynamic loading roller bearing axle-box under radial load. The influence of dynamic loads and defects in a roller bearing axle-box site on a safety of movement of the carriage.