Browsing by Author "Gorbunov, M. I."

Now showing 1 - 13 of 13
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    Conceptual basis of thermo-controllability in railway braking tribo pairs.
    (2019) Gorbunov, M. I.; Fomin, O. V.; Prosvirova, O. V.; Prokopenko, P. M.
    Nowadays, the problem of insufficient braking power is solved by increasing the number of friction pairs, resulting in an increase in resource and labor intensity, unsprung mass, resistance to movement, and low resource efficiency. Also acute is the problem of reducing the noise level when using friction brakes. The analysis of the problems of existing brake equipment led to the choice of a promising direction of research on the effectiveness of braking ‒ control of the temperature of the brake friction surfaces. Purpose. To create a method for increasing the efficiency of the braking system by controlling the cooling of the friction surfaces by adaptive air supply; to create a mathematical model of air pressure supply to the brake frictional contact in order to obtain the optimal diameter of friction lining holes and the air feed rate. Methodology. During the research, the analysis of leading modern studies and patents of technical solutions aimed at improving the frictional properties of brake devices, methods of decision-making theory and expert evaluation of methods for improving the operational characteristics of railway braking systems is conducted. Mathematical modeling of air pressure supply to the zone of relevant frictional contact is applied. Findings. A concept of adaptive energy consumption management at self-ventilation of a brake disc plate using the improved mathematical model which considers geometric parameters of air courses. A method for assessing the influence of the factors on brake equipment operation while supplying the compressed air to the frictional contact is suggested. Originality. The mathematical model of air pressure supply to brake frictional contact is developed in order to obtain the optimal diameter of the friction lining holes. Application of the suggested technique for cooling will allow advancing efficiency of operation of frictional braking elements of rolling stock, increasing the adhesive coefficient, stabilizing the temperature in the tribo-contact, decreasing the wear of brake surfaces of friction and increasing safety of operation. Practical value. As a result of the conducted research complex, the method of adaptive forced cooling of the friction surfaces of the brake was proposed and scientifically substantiated for the first time, which will provide effective characteristics of the cooling process, will allow reducing significantly the dependence of the coefficient of friction on the temperature in the contact zone of the working elements during braking. The application of the proposed developments will allow: - using the compressed air, which is drawn from the brake cylinders, effectively; - cooling the contact area of “brake pad ‒ wheel”, “brake pad ‒ disk”, by supplying compressed cooled air into the holes of the brake pad or formation in the contact zone of the active gaseous medium; - increasing braking efficiency and reducing the intensity of wear of the brake pads due to the timely removal of friction wear from the contact area; - increasing the rail traffic safety by enhancing the reliability of braking.
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    Conceptual basis of thermo-controllability in railways braking tribopairs.
    (2019) Gorbunov, M. I.; Fomin, O. V.; Prosvirova, O. V.; Prokopenko, P. M.
    Nowadays, the problem of insufficient braking power is solved by increasing the number of friction pairs, resulting in an increase in resource and labor intensity, unsprung mass, resistance to movement, and low resource efficiency. Also acute is the problem of reducing the noise level when using friction brakes. The analysis of the problems of existing brake equipment led to the choice of a promising direction of research on the effectiveness of braking ‒ control of the temperature of the brake friction surfaces.
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    Creation of the image of the new generation freight car bogie.
    (2018) Gorbunov, M. I.; Kara, S.; Nozhenko, O.; Fomin, O.; Vaičiūnas, G.; Petrenko, V.
    Analysis of the operating problems of freight car bogies are carried out, analysis of the reasons for low dynamic qualities, which do not allow to increase the speed of movement. The main directions of the development of the bogies constructions are substantiated. The image of the new generation freight car bogie is formulated based on analysis, ideas of car building projects using the method of intellectual decision support. Concept image and patented technical solutions for implementation are solving the problem of minimizing the weight of the bogie (increasing of coefficient of mass utilization) by using a modular design, application of elastic-damping structures, prestressed state of structural elements. Technical solutions improve the strength characteristic and dynamic properties of the freight car bogies on the basis of the above principles of engineering.
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    Development and evaluation of technical solutions to increase the qualitative level of the locomotive undercarriage
    (СНУ ім. В. Даля, 2021) Gorbunov, M. I.; Kovtanets, M. V.; Serhiienko, O. V.; Kovtanets, T. M.; Горбунов, М. І.; Ковтанець, М. В.; Сергієнко, О. В.; Ковтанець, Т. М.
    The monograph deals with issues of development and evaluation of technical solutions that increase the quality level of the locomotive's running gear. The evaluation of the effectiveness of the constructive options of nodes and devices is carried out with the help of simulation and mathematical modeling methods.
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    Development of the theory and methodology of controlling the local tribological contact thermomechanical loading.
    (2018) Gorbunov, M. I.; Kovtanets, M.; Kostyukevich, A.; Nozhenko, V.; Vaičiūnas, G.; Steišūnas, S.
    Theoretical and experimental studies have been carried out, which confirmed the fact that the contact temperature is the most important factor affecting the entire complex of service properties of the contacting materials. The authors of the paper propose the control of the frictional interaction of the tribological contact by controlling the temperature by forced cooling, which will stabilize the coefficient of engagement of the wheel with the rail.
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    Experimental study of the influence of friction surfaces cooling parameters on the efficiency of the braking system of a railway vehicle operation.
    (2018) Gorbunov, M. I.; Prosvirova, O.; Kovtanets, M.; Nozhenko, V.; Bureika, G.; Skrickij, V.
    The purpose of the study is to evaluate the effect of cooling frictional surfaces on the efficiency of the braking system by experimentally determining the coefficient of friction and the temperature of the interacting surfaces under different methods and regimes of cooling. Experimental research established that the mathematical model of the disc brake thermophysical characteristics, which takes into account the adaptive cooling system, ensures a satisfactory match of the results of calculations to experimental data; the discrepancy does not exceed 10-12%. Analysis of the experimental data obtained allows concluding that adaptive cooling of the brake friction surfaces has a positive effect on the braking efficiency. Thus, the coefficient of friction when using this system is 15-30% higher, depending on the performance and temperature of the cooling air, than without its use. The average integral temperature of surfaces in frictional interaction is lower by average of 20-30% compared to the case when adaptive cooling is not used.
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    Prediction of tractive and dynamic performance of locomotives by simulation modeling
    (СНУ ім. В. Даля, 2021) Gorbunov, M. I.; Kovtanets, M. V.; Serhiienko, O. V.; Kovtanets, T. M.; Nozhenko, V. S.; Горбунов, М. І.; Ковтанець, М. В.; Сергієнко, О. В.; Ковтанець, Т. М.; Ноженко, В. С.
    The monograph considers the issues of assessing the traction and dynamic qualities of locomotives based on the methods of simulation modeling of the processes of frictional interaction between the wheel and the rail, the characteristics of the suspension elements and the movement of the rail vehicle.
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    Reducing the wheel-rail system wear intensity with thermomechanical impact.
    (2019) Gorbunov, M. I.; Kovtanets, M.; Bureika, G.; Kovtanets, T.
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    Research to improve traction and dynamic quality of locomotives
    (2017) Gorbunov, M. I.; Pistek, V.; Kovtanets, M.; Nozhenko, O.; Kara, S.; Kučera, P.
    The article reviews and analyzes available theoretical and experimental studies aimed at improving the tractive and dynamic characteristics of locomotives. Based on the information received, the authors formulated the following tasks of further research to increase and stabilize traction and coupling qualities of the locomotive.
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    Study into Improvement of the Hatch Covers of General-Purpose Open Wagons to Provide Strength under Operational Loading Diagrams.
    (2019) Fomin, O., Gerlici, J., Gorbunov, M., Lovska, A., Kravchenko, K., Burlutski, O., Lack, T.; Fomin, O. V.; Gorbunov, M. I.; Lovska, A.; Kravchenko, K.; Burlutski, O.; Lack, T.
    The article presents the results of research into the strength of the hatch covers of general-purpose open wagons. It was detected that strength of the standard hatch covers is not provided in operational loading diagrams. Therefore, new designs of the hatch covers for open wagons were proposed. The results of the strength calculation, implemented with the finite element method, make it possible to conclude that at basic and additional operational loading diagrams the strength values for proposed designs of hatch covers do not exceed the admissible values. The research conducted can contribute to a higher strength of the carrying structures of the bodies of general-purpose open wagons in operation, thus, guaranteeing a higher operational efficiency of the rail transport.
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    Theoretical Aspects of Applied Transport Mechanics. Part 1
    (СНУ ім. В. Даля, 2019) Fomin, O. V.; Gorbunov, M. I.; Burlutski, O. V.; Фрмін, О. В.; Горбунов, М. І.; Бурлуцький, О. В.
    The monograph comprehensively defines theoretical designing principles for transport systems and mechanisms, as well as their individual components at the present stage. The results and peculiarities of the work conducted in terms of creation and investigation into carrying structures of transport facilities were previously published in some Ukrainian and international specialized editions, discussed and obtained approval at some international scientific and technical conferences. We wrote this book for scientists and engineers whose fields of the professional expertise are related to design and research of railway rolling stock, it also could be useful for the university teachers, students, post-graduate students of the named sphere.
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    Theory and practice of the innovative spring suspension design for locomotive to improve its traction and dynamic characteristics.
    (2018) Gorbunov, M. I.; Kravchenko, K.; Kara, S.; Gerlici, J.; Bureika, G.; Steišūnas, S.
    This paper deals with the methods and techniques of the locomotive dynamic characteristics improvement, decrease in force impact on the track, minimizing tire and rail wear by secondary suspension improvement. Based on the calculations carried out using the created mathematical models and experimental research, there are proposed series of construction solutions of the supporting and returning devices with rational characteristics, which allow improving traction characteristics of the locomotive and reducing its dynamic impact on the track in vertical as well as in horizontal planes, on the straight track as well as on the curved track. Moreover, the proposed solution can provide the locomotive body with the centering function relative to the bogie. The proposed body to bogie connection was tested using a special test stand and in operating conditions. According to the test results, the proposed construction of body to bogie connection can ensure the required rigidity and damping characteristics due to the design optimization.