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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.

The results of the pilot studies to increase the resource of the wheel of the rail stock are presented. The electroslag melting is used to restore the surface rolling and the wheel cam of the cars and locs wheels. The experimental research adopts its perspective.

On the basis of the analysis of statistics of the incidents which have occurred on the railroads of Russia and connected with collisions of trains with obstacles, the most probable scenarios of development of an emergency situation are allocated. Modern methods of investigation of kinematics and dynamics of vehicles are analyzed. By methods of solid-state computer modeling the estimation of the dynamic loadings acting on the locomotive and passenger cars at collision of the passenger train with an obstacle in the form of the lorry on the railway crossing is carried out. For this purpose solid-state computer model of a passenger train and a cargo car. The obtained results indicate a high dynamic load of the locomotive in a collision. At the same time, passenger cars are affected by low dynamic loads that do not lead to damage to the load-bearing structures of passenger cars. The obtained results can be used in the creation of modern passenger rolling stock, characterized by high demands on safety in emergency situations. The work was carried out within the grant of the President of the Russian Federation for the state support of young Russian scientists MK-2881.2018.8.

This article discusses the use of innovative technology-carburizing copper collector plates and apparatus for forming a carbon layer on the working surface of the collector traction motors. To improve switching performance and improve the reliability of electric vehicles are encouraged to use the DC electroerosion processing method.

At this time, an urgent area of development in the field of railway transport is the reduction of operating costs for maintenance and repair of collector traction motors . The analysis of data from the monitoring of new rolling stock shows that one of the elements affecting the reliability during the operation of traction motors is the collector-brush unit. Failures associated with unsatisfactory operation of the collector-brush unit elements reach 30% of the total number for traction motors. At work of traction electric motors there is a continuous process of mechanical, electric and chemical interaction of electric brushes with a collector, leading to deterioration of electric brushes. During the research, the authors proposed a mathematical model to determine the intensity of wear of electric brushes. The paper provides information about developing an approach that allows using the operating data recorded by locomotive on-board parameter monitoring system to determine the service life of traction motor brushes. For elimination of the problem connected with processing of big arrays of parameter values for calculation, in mathematical model of intensity of wear of electric brushes it is offered to divide the received data into intervals with definition of average values and probability of approach for each of them, and also the technique on realization of the offered decision is resulted. The developed approach allows us to eliminate the need for long-term wear tests on traction motors in operation and reduce not only time, but also financial costs. The reliability of the developed method was assessed by comparing the wear values of different types of electric brushes installed on locomotive traction motors in operation with the calculated values.

The article considers the dynamic processes of the oscillatory system «wagon - way», its mathematical model is formed and its features are established. The analysis of existing approaches to the consideration of the influence of dissipative forces on the stability of rolling stock is carried out, their shortcomings are revealed. When composing dynamic process equations, it is important to proceed from their exact expressions when considering kinetic and potential energy, i.e. to take into account the relationship between generalized coordinates, which will allow us to consider in detail the process of rolling stock oscillations. The zone of autoparametric resonance is found. It is established that dry friction forces do not interfere with parametric resonance. Dynamic equations are compiled taking into account the scattering forces arising in the contact points of the structural elements of the car. The influence of dry friction forces on the critical coefficient of parametric excitation is determined. The areas of dynamic instability of a car when moving along a railway track with different characteristics are determined. The features of the behavior of the system under the influence of dry friction forces are revealed. It is established that dry friction forces do not reduce the amplitude of bouncing and can lead to an increase in lateral pitching vibrations due to energy pumping.

The article discusses the specifics of the locomotive reliability indicators use in the Russian Railways. Examples of locomotive reliability indicators and the indicators used in the Russian Railways in the conclusion of service contracts, including under the life cycle contract are given. A method of transition from national standard to Russian Railways has been proposed. It is concluded that these procedures can be automated.

This article describes the standard field reduction system of traction electric motors of a contactor-resistors type using inductive shunts, its drawbacks are revealed. An improved field reduction system of traction electric motors of an AC locomotive based on IGBT transistors has been developed and proposed. The proposed solution will allow to exclude the copper-containing inductive shunt from the power circuit, while providing reliable protection in non-stationary operating modes of the electric locomotive, as well as reduce electricity consumption for train traction. To prove the advantages of the proposed the field reduction system of traction electric motors, a method of comparative analysis of electromagnetic processes of the mathematical model of the standard and proposed systems of the field reduction of traction electric motors of an electric locomotive obtained in the MatLab Simulink environment was applied. As a result, it is proved that the implementation of the field reduction systems of traction electric motors using IGBT transistors with the developed control algorithm provides an increase in the power factor of an electric locomotive on average by at least 4%, and also significantly reduces the ripple current of the traction electric motor.

The article proposes a method of calculation the load between the rolling bodies of the swinging bearings and the bearings of the traction motor, which makes it possible to have the value of the radial clearance in the bearing, as well as the radial movement of the inner rings relative to the outer one. To determine the load perceived by the most loaded rollers, a solution of the equilibrium equation for internal elements is proposed using simple iterations. The implementation of the method is implemented in the Matlab software package. Using the proposed method, the load distribution between the rollers in the traction motor of the VL11K electric locomotive was calculated. To determine the load acting on the bearing, the “Sarga-Subic” section was selected, which has a mountain profile.

The article describes the calculation of parameters of diesel fuel equipment on the nature of the change and the amount of fuel injection. Provides an implementation of the mathematical model of the fuel to be used when the kits before you install them on diesel and for calculation of parameters of parts used in the high pressure fuel pumps running on stands with a view to approximating the conditions of work in the booth to real conditions of a diesel engine and determine the correct performance of the pumps at the stand.

Abstact. During automated rheostat tests of locomotives itʹs necessary to control a lot of parameters of the diesel generator set and support systems. Due to the features of perception of the information by human the control is brought to the observation of a small number of parameters. Implementation in practice of rheostat tests of automated systems of inspection and testing allowed to expand the amount of received information. In this article is offered using automated control systems of diesel-generator sets parameters during rheostat tests which allow to accumulate and analyze test date using developed protocols forms and pivot tables with parameters in entire range of loads, also it helps to determine the quantitative index of a technical condition of diesel-generator set.

It is shown that dynamic systems, «rolling stock - way» due to the unevenness of the path on length should be described by ordinary differential equations with variable coefficients, the method of analyzing differential equations with constant, variable and random coefficients describing the movement of electric locomotive nodes when they move along an uneven path. In the transition to a new paradigm, we can talk about areas of dynamic instability, which in the case of simple parametric resonances develop near critical frequencies, but this is not one specific point, but a zone that expands with increasing coefficients of parametric excitation. In addition, the presence of friction in the system does not guarantee the limitation of resonant amplitudes. The effect of parametric arousal factors on the width of the dynamic instability zone has been established. There are many other features in the behavior of differential equations with variable coefficients, so it is impossible to replace the action of unevenness with some equivalent geometric irregularity, since at this moment there is no exact solution to the problem with which to compare the results of approximate mathematical models.

This article presents an analysis of the reliability of asynchronous auxiliary machines (AAM) type NVA-55 electric locomotives «Ermak» in custody Art. Vihorevka (East-Siberian Railway) and Art. Smolyaninovo (Far Eastern) for the 2009-2011 year. Identified the weakest in terms of reliability components and analyzes the main types and causes of these types of faults AAM. One of the research objectives reliability AAM type NVA-55 is to determine the mean time between failures that could prevent failures in the organization of maintenance and repair, as well as extend the life of the machine. Defining the objective mathematical expectation of failure AAM for effective correcting the overhaul life mileage is not possible, since failures are largely have random and not permanent.

The author considered the problem solving of control of the boiler hermeticity of railway tanks using contemporary control methods. The author described the activities and equipment which are necessary for assessment of technical state of large-volume vessels. The implementing algorithms of step-by-step operations for monitoring and analyzing the results processing are proposed. The proposed method of technical condition of the railway tanks boilers is based on the use of serial thermal imaging equipment, which allows to reduce the economic costs of monitoring and improve the working culture of the flaw inspector.

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 contains information about policy public corporation «RZD» in energy-saving and energy efficiency. Assessment of energy efficiency of application back-to-back method in testing induction tractive motors was executed as an example on modeling testing process of motors type NTA-1200.

The development of the system is accompanied by the diagnostics of their achievement in the technical system. Using the possibility of identifying defects in nodal technical systems in the early stages of their occurrence in order to timely and promptly anticipate, the emergence of work productivity, identify simple repair time, identify material costs for replacement or deep restoration. Railway transport is also at the stage of a wide identification of various components and parts of the rolling stock. the appointment of diagnostic systems is a locomotive fleet, as a more identified technical unit. Today, the locomotive fleet uses hardware and software diagnostic complexes, microprocessor-based diagnostic systems, on-board and track monitoring systems that cover the entire range of diagnostic data of the main technical units. However, the use of the availability of systems requires constant improvement of the mathematical model of diagnosis. One of the options for choosing diagnostic models is the use of artificial intelligence research methods - sections of artificial neural networks, which, in comparison with the classical polynomial regression properties, are manifested by the properties of extrapolation accuracy and are applicable for predicting the values of diagnostic parameters according to the data that were due to the sampling of an artificial neural network. These characteristics make it possible to predict the development of defects and possible failures safely and accurately to obtain them and obtain an economic result. The paper presents an example of the development of a diagnostic artificial neural network model for diagnosing oil starvation of motor-axial bearings of the wheel-motor block of a cargo mainline electric locomotive of the 3ES5K «Ermak» series. This factor has a low level of reliability, so the use of continuous diagnostics is required, which requires the use of a point in time.

Introduced on the Russian Railways network monitoring system download the snow train has allowed to identify cases of export volume of the snow mass is much less possible when cleaning railway tracks from snow, which leads to the underutilization of capacity of the snow trains and shunting locomotives and irrational use of fuel and energy resources for operation of rolling stock. The purpose of the work is to consider the fuel and energy efficiency of snow-removal trains and shunting locomotives carrying out their movement and to determine ways to reduce the consumption of fuel and energy resources for the performance of works on cleaning the tracks from snow (in economic traffic). To achieve this goal, one of the structural divisions of JSC "Russian Railways" estimated the volume of snow removal by snow-removal trains, calculated the values of mechanical work performed by locomotives to move snow-removal equipment and fuel consumption by snow-removal trains and locomotives to perform work on clearing snow from the tracks. On the basis of the comparative analysis the conclusion is made on the available reserves of increase of fuel and energy performance of the rolling stock while clearing paths of snow and the technique allowing to estimate the total fuel consumption for snow removal snow plow trains and traction units (locomotives), and ways to improve the power efficiency of snow-removing trains and working with them traction means, such as the use of rolling stock with a rational value of mass and power depending on weather conditions.

The article discusses the possibility of determining the specific fuel consumption of diesel locomotives in operation using indirect calculation methods based on the use of these locomotive onboard systems and supplementing them with mathematical models of the operating cycle and the model for determining the composition of the exhaust gases of a diesel engine. The basic equations and algorithms proposed for the implementation of such a method of mathematical models and the results of their use are presented, the results of a comparison of simulation results and experimental data on the specific consumption of fuel of diesel locomotives TEM18DM are presented. A possible algorithm for their joint use is proposed, conclusions are made on the possible development of such a method for determining the energy efficiency of diesel locomotives without taking them out of service.

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.

Article is devoted to mathematical modeling of heat transfer to the cooling system of locomotive diesel engine . The article presents the features of calculation of heat to the cooling system of a diesel engine when idling.

Offers a probabilistic model of formation of modes load of diesel-generator unit locomotives given the power of auxiliary units in conditions of their operation on the example of locomotives 2TE10M.

This article describes different ways of mass-burned fraction curve calculation, shows the Pugachev’s combustion rate equation structure, method of this equation factors selection and simulating versus experimental data matching.

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

He method of researching the dynamic properties of the railway crew in the action on it harmonic parametric perturbation, caused by the changing rigidity of the base of the rail, is set out. For such differential equations there are no regular methods of solving them, moreover, their exact solutions are not known at present, so they are used by approaching methods. A two-degree mechanical system with a harmonic parametric perturbation described by a system of ordinary homogeneous differential equations is considered. One of the hard-bone parameters is a function of time and varies from 2000 to 3000 N/m. To calculate the boundaries of dynamic instability (parametric resonance) a method of generalized Hill definers is used, which does not require the introduction of small parameters. The area of interaction of parametrically excited and forced vibrations has been determined.