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Introduction. The paper considers equipping rolling stock with new lightweight wheel stops of increased reliability, as well as the use of the drag shoes on space intervals, including abnormal situations.Materials and methods. The authors performed field tests to compare the performance of lightweight wheel stops TM 37.10.2016 and hump drag shoes 8739.00. The paper determined the tractive force for moving a empty car train and loaded car train equipped with drag shoes.Results. The paper analyses the securing of railway rolling stock with wheel stops on space intervals with different gradients and different weights of trailing rolling stock. The paper describes the developed methodology of emergency withdrawal of a multiple unit rolling stock with a wedged wheel pair using wheel stops and determines the ultimate sliding distance of the wedged wheel pair compared to the hump drag shoes. The paper established that withdrawing the electric rolling stock from the space interval with the wedged wheel pair requires 4 times more wheel stops than the hump drag shoes.Discussion and conclusion. The authors shown that traction rolling stock permits the practical replacement of hump drag shoes 8739.00 currently in use with wheel stops TM 37.10.2016. The braking characteristics of wheel stops and hump drag shoes only differ during the short initial period of paint abrasion on the rubbing surface of the wheel stop skids. Since the drag shoes for rolling stock are intended for emergency, their rubbing surface must not be painted.

Introduction. Railway transport has ultrasonic control as one of the main methods of detection of defects of the type of continuity violation (cracks, pores and others) both in the base metal and in weld seams of various items. Ultrasonic control tools primarily include a flaw detector with piezoelectric transducers. Piezoelectric transducers are usually supplied with the flaw detector depending on the general or specialized configuration. Flaw detector manufacturers often offer the customer their own piezoelectric transducer kits for certain device configurations with installed software referring to incompatibility of other manufacturers piezoelectric transducers with the electronic unit. The article is intended to carry out a comparative analysis of ultrasonic control sensitivity using straight and angle transducers of different manufacturers, and to compare the results with the control sensitivity using piezoelectric transducers traditionally used on the railways.Materials and methods. The paper gives the results of testing the sample using Flaw Detector UD2-102 Peleng produced by Altek LLC. Industrial oil I-20 was used as a contact fluid. The authors compared the following piezoelectric transducers: straight (made by Altek LLC and NPO INAKON (Russia)) and angle (Altek LLC (Russia), Iskatel-2 LLC (Russia) and SIUI (China)).Results. The paper reports the results of an experiment detecting artificial reflectors in the form of through cylindrical side holes in a sample of 20GL steel by straight and angle piezoelectric transducers of different manufacturers using Flaw Detector UD2-102 Peleng.Discussion and conclusion. Connection of other manufacturers transducers to Flaw Detector UD2-102 Peleng of Altek LLC confirmed that they are compatible with the electronic unit. Thus, given the choice of a wide selection of piezoelectric converters from various manufacturers, the requirement of coordination with the electronic unit of Flaw Detector UD2-102 may be neglected. At the same time, it is important that the manufacturer stipulates the joint use of its product with other types of flaw detectors.

Introduction. Interference in the continuous automatic cab signalling channel distorts transmitted signals and causes signalling malfunctions. Reduction of interference in the channel involved a previously proposed receiver with quadrature channels and its implementations with non-linear signal transformation in one or two sections of the receiver. The research is intended to find the best implementations of the quadrature receiver.Materials and methods. The research uses a computer simulation of the operation of the studied receivers under the influence of harmonic interference from a power line. For this purpose, the authors used Simulink visual programming environment and developed receiver simulations, applied the harmonic interference simulation model and conducted experiments to assess noise immunity expressed as a time interval showing receiver malfunction.Results. The researchers determined the effect of non-linear signal transformation on the harmonic noise immunity of the receivers.Discussion and conclusion. The research shows that the receiver with a deadband is the most preferable of all considered variants of quadrature receivers in terms of maximum harmonic noise immunity. The receiver with combined interference suppressor and deadband is slightly inferior.

Purpose. Simulation of mine locomotive braking process performed by means of AP10PB wheel shoe brakes on a rail way with different coefficient of rolling friction and steps of rails joints through applying of braking torques, which cause over brings to failure of traction of the wheel in the point of its contact with the rail. Methodology. Composition of equalizations of Lagrange of the second degree, which after transformation into differential equalizations of the second degree have been solved by means of the mathematical software Wolfram Mathematica 7, has been used to determine the length of braking distance. Findings. Theoretical research of influence of muddiness and steps of mine rails track on the process of braking of biaxial locomotive AP10PB (mass of 10 tons) with rolling stock of the loaded trolleys by the devices which realize brake force in the point of contact of wheel and rail has been conducted. Even insignificant defects on rail way are able to influence considerably on the quality of braking process of biaxial locomotive AP10PB with the stock of the loaded trolleys. It is found out that influence of steps of rail joints on brake force in the contact point of wheel and rail for the biaxial locomotive is not so considerable, as for fouraxialjoint-joined one of similar trailing weight. Originality. Use of the preliminary measured parameters of rail way, such as muddiness, crossfall and inclination, steps of rail joints est. in calculation of the braking distance of a train. Practical value. The research results allow us to count the number of the loaded trolleys which can be transported by a mine locomotive through the dangerous section of rail way with known geometry features. [ABSTRACT FROM AUTHOR]

Purpose. To solve the problem of the low durability of wheelpairs of electric locomotives and trolleys working in the conditions of abrasive dust and increased humidity, with lots of curves of small radius of less than 10 meters, the poor condition of the rails and ballast. Disruption of the work rhythm of the technological chain 'face - lift' causes economic loss. Methodology. In mines of Krivyi Rig bassin we have studied the characteristics of operation of wheels (track geometric parameters and their stability, which includes broadening of rails, unevenness in height, gaps between the rail joints), environment settings and operating conditions (hardness and abrasiveness of dust, humidity of the rail track). Findings. Constructive solutions for uniform distribution of loads between the wheels and bearing units of locomotive transport, and processing methods of improvement of the reliability of wheelpairs have been found out. Based on the analysis of the locomotive transport working in mines of Krivyi Rig bassin, namely: wheel set design, production technology, operation and maintenance, recommendations on improvement of its reliability have been suggested. The most efficient and cost effective way to solve this problem is to choose the right grade of steel, production and heat treatment technology for the wheels, takind into account the wheel-rail contact. Originality. We have analyzed contact interaction between wheel and rail in real conditions and studied the effect of different factors on the wear resistance of the wheels. Practical value. We have analyzed the technology of wheels and wheel set production at factories. As a result the optimal chemical composition of steel and proper heat treatment technology has been suggested. After analysis of the operating conditions of the locomotive transport and production technologies we have proposed ways to improve the wear resistance of the wheelpairs. Constructive solutions concerning design of wheels and suspension system, as well as technological methods of rising reliability of the wheelpairs will reduce the production cost of minerals, and increase productivity. [ABSTRACT FROM AUTHOR]

In the beginning of XXI c. it is quite possible to state the mass-cultural end of the Freudian decentered subject. Instead of it there is ideologically dominant re-centered cognitive-behavior individual. That is why we think it is important to come back today to the points in the history of the Western culture when the revolutions of decentration took place. In this text -- Noises of the Little Hans and Hum of Time -- there are some principle figures of the decentration revolution: The Little Hans, Freud, Lacan, Russolo, Schoenberg, Avraamov and also a displaced horse and a coming locomotive. [ABSTRACT FROM AUTHOR]

Processes of thermal transference from conductor with direct current to insulation and iron sheets of diesel locomotive traction motor rotor are considered in this article. The method of thermal process computer modeling in traction motor with help of computer program Solid Works. [ABSTRACT FROM AUTHOR]