Кафедра "Вагони та вагонне господарство" ДІІТ
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ENG: Department of Wagons and Rolling Stock
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Browsing Кафедра "Вагони та вагонне господарство" ДІІТ by Author "Bulakh, Maryna"
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Item Determination of the Filler Concentration of the Composite Tape(MDPI, 2022) Baranovskyi, Denys; Myamlin, Sergey; Bulakh, Maryna; Podosonov, Dmytro; Muradian, LeontyENG: For the first time, a theoretical dependence was obtained to determine the filler concentration of the composite tape. On the basis of this dependence, a composite tape with variable mechanical and tribological properties can be obtained. It is proposed that the composite tape is welded onto the cylindrical surface of the central bowl of the rail truck bolster. The bench tests made it possible to determine the degree of wear of the central bowl of the rail truck bolster by means of a welded composite tape. The wear value of the central bowl of the rail truck bolster with welded-on composite tapes is 0.15–0.18 mm per 10,000 km of a freight car’s mileage. The predicted service life of the central bowl of the rail truck bolster with a welded-on composite tape is 320–420 thousand km.Item Determination of the Risk of Failures of Locomotive Diesel Engines in Maintenance(MDPI, 2023) Baranovskyi, Denys; Bulakh, Maryna; Michajłyszyn, Adam; Myamlin, Sergey; Muradian, Leonty A.ENG: This article presents a mathematical model of the risk of failures, depending on the operating parameters, of locomotive diesel engines. The purpose of this study is to determine the risk of failures of locomotive diesel engines in maintenance. The theory of probability and the theory of logic and reliability are used in this theoretical study. The innovations and main works are the first approaches to calculating the risk of failures of locomotive diesel engines by hourly fuel consumption, which, under operational conditions, allows for extending the life of locomotive diesel engines during maintenance. As a result, a maintenance process for 5D49 diesel engines is developed in a locomotive depot. When managing the maintenance processes of 5D49 diesel engines in the locomotive depot, it is determined that the optimal mileage is 45,000 km. The resource of 5D49 diesel engines in the locomotive depot increased by 2.4% in the management of the maintenance process compared to the existing maintenance system.