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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.

Traffic safety of trains is a priority task of JSC «Russian Railways». In article the reasons of spontaneous operation of brakes of freight trains are investigated and their statistics depending on density of brake network of the train is given. Calculation of pressure in the camera under the equalization piston of the crane of the driver is made. Inertial characteristics of the equalization piston and its static characteristics are defined. Process of spontaneous operation of autobrakes on the basis of fundamental laws of a hydraulic gas dynamics is simulated.

Constantly conducted studies of the reliability of electric equipment of traction rolling stock have shown that the most vulnerable element is the insulation design of the windings of power equipment, especially traction motors. Existing methods and means of restoration and repair of insulating structures of windings of traction motors of modern electric locomotives, based on drying polymer insulation in convective high-power electric furnaces, are energy and time-consuming. This technology has not undergone significant changes for over 50 years. In order to extend the polymer insulation life of electric vehicles of traction rolling stock, an insulation drying technology using thermal radiation was proposed that reduces the cost of electricity for repairs and increases the drying speed by reducing heat loss. The article is devoted to the design of a new device for drying the insulation of the windings of the magnetic system of the skeleton of the backbone of the electric locomotive traction engine by a rotating thermal field. The analysis of works and conclusions based on the results of theoretical studies related to mathematical modeling is presented. As a method of mathematical modeling, the finite element method was used in the work. A simplified 3D model of the winding of the core magnetic system with infrared emitters was created. According to the results of finite element mathematical modeling, temperature fields of heating the polymer insulation of the windings of the core of the traction motor were obtained. Based on this calculation, the work selected the optimal design parameters of the proposed device that provide the minimum energy costs for various sizes of the skeleton of the traction engines. Based on the proposed device variant, an application for a patent for a utility model has been filed, and this prototype is being assembled on the basis of the Ulan-Ude locomotive and car repair plant, a branch of Zheldorremmash JSC. New directions for further research are also set.

This article analyzes the conditions of work of asynchronous auxiliary machines (AVM) electric AC, mainly operated on the network of the East-Siberian railway. Presented the experimental data on the dependence of the motor phase currents ANE 225 locomotive VL 85 on the value of the supply voltage, the duration of start - MC with an induction motor, depending on the voltage of contact network, change the moment of resistance of the compressor depending on the air temperature. Reviewed the features work of the AVM, in particular, their alternate launch of its own needs winding of traction transformer. As a result of systematization of operating conditions affecting the isolation of AVM in order to optimize the parameter tracking their rate of wear, which resulted in the allocated two major factors of aging insulation overheating and vibration, and one factor that increases the probability of failure, regardless of the degree of aging of insulation - it moisturized

In this article, the authors have studied the electromagnetic processes of an inverter based on thyristors and IGBT transistors of an AC electric train in the regenerative braking mode. To accomplish this task, a method was used to compose instantaneous replacement schemes and systems of differential equations corresponding to a certain time interval of the rectified voltage diagram and the currents of the inverter arms. On the basis of the study were given the disadvantages of thyristor inverter and the advantages of transistor.

Currently, in the brake system of operated cars, there is a problem of lack of brake pressure on the wheel, which is necessary for the movement of the train at a set speed in accordance with the regulatory documentation. This is due to the tendency to increase the mass of trains and the maximum load of cars with a constant tare weight, which requires an extended range of pressure control in the brake cylinder by an air distributor or auto mode, depending on the load of the car. To solve this problem, calculations were made of the braking coefficient of cars equipped with air distributors № 483, which showed that the freight car was not equipped with brakes to run as part of a train at a set speed. In the course of engineering studies, it turned out that increasing the spring rate of loaded and medium modes can increase the adjusting range of the air distributor and partially solve the problem of lack of brake pressure. Thus, it is proposed to recalculate the stiffness of the adjusting spring. Calculations of the rigidity of regular and proposed springs were made. The braking coefficient has been recalculated, taking into account the increased spring constant. As a result, this coefficient has increased, which makes it possible to remove speed limits. The proposed method for upgrading the air distributor can be carried out on all types of repairs, which facilitates the implementation process.

Traction electric machines (TEM) of locomotives operating at the Eastern circulation range have insufficient reliability, mainly in terms of insulation breakdown, being one of the most important problems in the operation of electric rolling stock. This article discusses the method of drying wetted insulation by mobile and stationary electric heaters, which are used in the process of repairing traction electric motors of locomotives and electric trains. The problem of operating these installations is their low energy efficiency. With a constant power supply, the heating elements and the fan of the electric heater remain on during the entire drying process of the insulation, which leads to significant energy consumption, and the drying process is recorded by conducting paper workflow, recording the technical condition of the TU-152 locomotive in the log. To eliminate these shortcomings, the authors propose the modernization of the electric heating installation by introducing into it a microprocessor-based system for automatic regulation of the drying process with cloud storage technology. The article presents a block diagram of the proposed automated system, which will implement the three-cycle amplitude-latitude-discontinuous method of energy supply proposed at the FGBOU VO "IrGUPS" in the process of drying the wet insulation of the TED. Currently, cloud storage technologies have found their application in companies of various kinds of activity, it is being actively improved due to the constant increase in the amount of information that needs to be stored or transferred, and in addition, the user can have access to it from anywhere in the world. In recent years, the world has noticeably increased interest in the application of this technology in railway transport. As part of the modernization of the installation, it becomes possible to remotely control its operation, as well as store and process the information received on the drying process of wetted insulation.

Corrosion processes at various constructive changes of grounding system of traction substation are considered: construction of new cable lines, expansion of the territory of substation, etc. Calculation of corrosion processes of the grounding system consisting of three electrodes is carried out: steel in concrete, the metal gauze in soil, a steel vertical electrode in soil. Results of calculations are presented, the analysis of corrosion processes is made under various conditions.

The mathematical method of calculation of currents of corrosion of two models of grounding models - ekvipotentsialny and nonkvipotentsialny is presented. Soil and electric corrosion of both models is considered. The mathematical method of calculation of sizes of corrosion currents and potentials will allow to estimate a corrosion condition of elements of grounding system of traction substation.

At this time the traction electric motor (TEM) is one of the most important elements of the design of rolling stock, since the safety and stability of the transportation process on the railway network of JSC "Russian Railways" depends on its uninterrupted operation. This article is given a detailed analysis of the TEM failures of diesel locomotives of the 2,3TE10 v / series and the assigned fleet of the Novaya Chara locomotive depot of the East Siberian Traction Directorate. The section of circulation of diesel locomotives from Taksimo station to Hani station is one of the most difficult not only in the borders The East Siberian Railway, but also the entire railway network of the country. The analysis of the statistics of the reasons for the failures of the TEM of locomotives of the Novaya Chara locomotive depot for 2006 - 2012 showed that there is a rather extreme operation mode and that most of the failures are due to the breakdown of the insulation of the anchor winding of the TEM. During a research trip to the diesel locomotive maintenance site, a team of IRGUPSA scientists conducted full-scale measurements speed of movement, driving mode of the train, heating temperature of the TEM, taken into account the climate factors - ambient temperature, relative humidity, pressure and others. After studying the available information, it was proposed to additionally coat the insulation with FL-98 varnish in order to maintain and restore its properties in the conditions of the Winter locomotive depot during TR-3. IRGUPS has been working for a long time to study the process of drying insulation using infrared radiation (IR). The effectiveness of this method has been proven by numerous experimental studies. Several PhD theses have already been defended in various dissertation councils on this topic. This article presents also the statistics of failures of operated TEM already with additional varnish-impregnated insulation of open frontal parts after the implementation of measures based on the results of the work of the IRGUPS group of scientists. It is established that the method of applying the compound to the insulation of the frontal part of the windings of electric machines and encapsulating it with the help of IR radiation energy is effective in combating TEM failures due to insulation breakdown.

In this article, the currently existing methods for determining such a technical parameter as the sliding friction coefficient were considered. The coefficient of friction is one of the main parameters characterizing the operation of tribological pairs of any engineering system. Stable and efficient operation of tribological pairs in such systems, along with high strength and fatigue characteristics, are not only the basis of safety, but also a promising direction in terms of economic benefits in the design and operation of various devices and systems. Accordingly, this area of research is very relevant for the railway industry, and for railway rolling stock in particular. This is caused by a large number of friction pairs in different nodes of passenger and freight cars, locomotives, ensuring safe and uninterrupted movement of rolling stock as a whole on iron drogs. Tribological processes are important both directly during movement and during braking processes. In this matter, the factor of determining and analyzing the sliding friction coefficient comes to the fore. One of these friction pairs is the «pad-wheel» system, which is the executive body of the braking system of a railway train. Optimization of contact in this system is one of the determining factors for the growth of braking efficiency during braking, increasing the working life of the elements of the friction pair, reducing the likelihood of defects. The search for new approaches to the study of friction issues is a direct catalyst for scientific and technological progress in the engineering industry.