Browsing by Author "Koreniuk, Roman O."
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Item Energy Efficiency of Diesel locomotive Hydraulic Transmission Tests at locomotive Repair Plant(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпропетровськ, 2015) Bodnar, Borys Ye.; Kapitsa, Mykhaylo I.; Ochkasov, Oleksandr B.; Koreniuk, Roman O.ENG: Purpose. In difficult economic conditions, cost reduction of electricity consumption for the needs of production is an urgent task for the country’s industrial enterprises. Technical specifications of enterprises, which repair diesel locomotive hydraulic transmission, recommend conducting a certain amount of evaluation and regulatory tests to monitor their condition after repair. Experience shows that a significant portion of hydraulic transmission defects is revealed by bench tests. The advantages of bench tests include the ability to detect defects after repair, ease of maintenance of the hydraulic transmission and relatively low labour intensity for eliminating defects. The quality of these tests results in the transmission resource and its efficiency. Improvement of the technology of plant post-repairs hydraulic tests in order to reduce electricity consumption while testing. Methodology. The possible options for hydraulic transmission test bench improvement were analysed. There was proposed an energy efficiency method for diesel locomotive hydraulic transmission testing in locomotive repair plant environment. This is achieved by installing additional drive motor which receives power from the load generator. Findings. Based on the conducted analysis the necessity of improving the plant stand testing of hydraulic transmission was proved. The variants of the stand modernization were examined. The test stand modernization analysis was conducted. Originality. The possibility of using electric power load generator to power the stand electric drive motor or the additional drive motor was theoretically substantiated. Practical value. A variant of hydraulic transmission test stand based on the mutual load method was proposed. Using this method increases the hydraulic transmission load range and power consumption by stand remains unchanged. The additional drive motor will increase the speed of the input shaft that in its turn will allow testing in closer to real conditions as a result of increased load on the hydraulic transmission. Increased load on the hydraulic transmission will help to detect possible defects and hence will improve the quality of transmission repairs.Item Using the Self-Braking Method when the Post-Overhaul Diagnostics of Diesel-Hydraulic Locomotives(Kaunas University of Technology; Publishing House “Technologija“, Kaunas, Lithuania, 2018) Bodnar, Borys Ye.; Ochkasov, Oleksandr B.; Bobyr, Dmytro V.; Koreniuk, Roman O.; Bazaras, Ž.ENG: A large number of diesel-hydraulic locomotives are operated at industrial enterprises. Reliability of diesel locomotives in operation directly depends on the quality of the conducted acceptance testing of the hydro-transmission after repair. Test procedures presuppose running-in and testing the hydraulic transmission in all modes of its operation. Run-in time is established by normative and technical documentation. During the running-in, the technical condition of the hydraulic transmission is determined on the base of the control of input and output parameters (shafts speed, temperature and oil pressure). The authors propose to improve the running-in process by introduction of tools and techniques of technical diagnostics. With this aim features of post-overhaul diagnostics of diesel-hydraulic locomotive were analyzed. The article deals with the diagnostics the condition of the mechanical part of the hydraulic transmission UGP (UHT- unified hydraulic transmission) 750/120 after a major overhaul. Choosing the diagnostic parameters of the mechanical part of the hydraulic transmission was carried out. We proposed to use free path (self-braking) mode to determine the mechanical losses at bench tests. As the criteria, determining the technical state of the mechanical part of the diesel-hydraulic locomotive during the tests in the self-braking mode, the following values are proposed: run-down time of shafts; change in the braking torque and the power of mechanical losses depending on the angular velocity. Diagnostics of the hydraulic transmission according to the above criteria allows reducing the time of receive/running-in tests and significantly increasing the technical condition accuracy and characteristics of the technical condition.Item Аналитические зависимости для определения сопротивления качению конических колес(Хмельницкий национальный университет, Хмельницкий, 2011) Довбня, Николай Петрович; Довбня, Микола Петрович; Dovbnya, Mikola P.; Dovbnya, Nikolay P.; Бондаренко, Леонид Николаевич; Бондаренко, Леонід Миколайович; Bondarenko, Lеоnid M.; Bondarenko, Leonid N.; Коренюк, Роман Александрович; Коренюк, Роман Олександрович; Korenyuk, Roman А.; Koreniuk, Roman O.RU: Приведены аналитические зависимости, которые позволяют определить коэффициент трения качения для конических колес подвесных однорельсовых тележек и малоопорных поворотных устройств кранов