The influence of important factors on the distribution of heat flows in elements of drum brakes of vehicles

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dc.citation.epage89
dc.citation.issue1
dc.citation.spage83
dc.contributor.affiliationLviv Polytechnic National University
dc.contributor.authorHudz, Hustav
dc.contributor.authorHlobchak, Mykhailo
dc.coverage.placenameЛьвів
dc.coverage.placenameLviv
dc.date.accessioned2023-07-05T07:55:33Z
dc.date.available2023-07-05T07:55:33Z
dc.date.created2023-06-30
dc.date.issued2023-06-30
dc.description.abstractЗазначено, що рух автотранспортних засобів на значних швидкостях неможливий без гальмівної системи, здатної забезпечити високу ефективність гальмування. Встановлено, що найбільш нестійкою ланкою гальмівної системи є гальмовий механізм, оскільки з енергетичної точки зору гальмування фрикційними гальмами становить процес перетворення у тепло частини механічної енергії автотранспортного засобу. Гальмування – власне тривалий процес, упродовж якого змінюються багато параметрів контртіл, зокрема, теплофізичні параметри внаслідок температурних змін, коефіцієнт тертя тощо. Якщо за цих обставин поверхневі та об’ємні температури перевищують допустимі значення, то змінюються фрикційні властивості пар тертя й умови взаємодії деталей, що обумовлює зміну характеристик гальмових механізмів та гальмівної системи загалом. Стандартами більшості країн та міжнародними приписами регламентовано вимірники гальмівних властивостей не тільки за одноразових екстрених гальмувань холодними гальмами, але й за екстрених гальмувань, що здійснюються після перетворення в тепло заданої кількості енергії впродовж заданого часу. З’ясовано, що збереження необхідної ефективності гальмування після перетворення у тепло заданої кількості енергії буде забезпечено лише у випадку, коли гальмівна система володіє достатньою енергоємністю. Об’єктом дослідження є розподіл теплових потоків в елементах гальмового механізму, які визначають критичну температуру поверхонь тертя. Встановлено неспроможність формули Ф. Шаррона коректно оцінити такий розподіл через врахування тільки теплофізичних властивостей матеріалів пар тертя. Показано, що на сіткових теплових моделях із залученням програмного комплексу “Фур’є-2хуz” можна також оцінити вплив конструктивних параметрів гальма та режимів його роботи на розподіл теплових потоків у барабанному гальмі автотранспортного засобу.
dc.description.abstractThe movement of motor vehicles at high speeds is impossible without a braking system capable of ensuring high braking efficiency. It has been established that the most unstable link of the braking system is the brake mechanism, since from the energy point of view, braking with friction brakes is the process of converting part of the mechanical energy of the motor vehicle into heat. Braking is a long process during which many counterbody parameters change, in particular, thermophysical parameters due to temperature changes, friction coefficient, etc. If, under these circumstances, the surface and volume temperatures exceed the permissible values, then the frictional properties of the friction pairs and the conditions of the interaction of the parts change, which leads to a change in the characteristics of the brake mechanisms and the brake system as a whole. The standards of most countries and international prescriptions regulate braking performance meters not only for one-time emergency braking with cold brakes but also for emergency braking performed after the conversion of a given amount of energy into heat during a given time. It was found that the preservation of the necessary braking efficiency after the conversion of a given amount of energy into heat will be ensured only if the braking system has sufficient energy capacity. The object of the research is the distribution of heat flows in the elements of the brake mechanism, which determine the critical temperature of the friction surfaces. It was established that F. Charron's formula cannot correctly estimate such a distribution due to taking into account only the thermophysical properties of materials of friction pairs. It is shown that the influence of the design parameters of the brake and its modes of operation on the distribution of heat flows in the drum brake of a motor vehicle can also be estimated on grid thermal models with the involvement of the “Fourier-2xyz” software complex.
dc.format.extent83-89
dc.format.pages7
dc.identifier.citationHudz H. The influence of important factors on the distribution of heat flows in elements of drum brakes of vehicles / Hustav Hudz, Mykhailo Hlobchak // Transport Technologies. — Lviv : Lviv Politechnic Publishing House, 2023. — Vol 4. — No 1. — P. 83–89.
dc.identifier.citationenHudz H., Hlobchak M. (2023) The influence of important factors on the distribution of heat flows in elements of drum brakes of vehicles. Transport Technologies (Lviv), vol. 4, no 1, pp. 83-89.
dc.identifier.doihttps://doi.org/10.23939/tt2023.01.083
dc.identifier.urihttps://ena.lpnu.ua/handle/ntb/59388
dc.language.isoen
dc.publisherВидавництво Львівської політехніки
dc.publisherLviv Politechnic Publishing House
dc.relation.ispartofTransport Technologies, 1 (4), 2023
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dc.relation.references8. Hudz H. S., Hlobchak M. V. & Zakhara I. Ya. (2018). Teplovyi rozrakhunok dyskovykh halm avtomobiliv na tsyklichnykh rezhymakh roboty [Thermal calculation of car disc brakes in cyclic modes of operation]. Lviv: HALYCh PRES (in Ukrainian).
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dc.relation.references13. Tryshevskyi, O. I., Saltavets, M. V., & Vorobiov, D. S. (2019). Metodyka rishennia zvorotnykh zadach teploprovidnosti [Technique of solution of reverse tasks of heat conduction]. Visnyk Natsionalnoho tekhnichnoho universytetu “Kharkivskyi politekhnichnyi instytut” [Bulletin of the National Technical University “Kharkiv Polytechnic Institute”], 31(1306), 81–86 (in Ukrainian).
dc.relation.references14. Shcherbakov, V. K. & Lebed, N. L. (2020). Matematychne modeliuvannia teplofizychnykh protsesiv [Mathematical modeling of thermophysical processes]. Kyiv: National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” (in Ukrainian).
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dc.relation.referencesen1. Bulgakov, M., Shuklynov, S., Uzhva, A., Leontiev, D., Verbitskiy, V., Amelin, M., & Volska, O. (2020). Mathematical model of the vehicle initial rectilinear motion during moving uphill. In IOP Conference Series: Materials Science and Engineering, 776(1), (pp. 012022). doi: 10.1088/1757-899X/776/1/012022 (in English).
dc.relation.referencesen2. Shuklinov, S., Leontiev, D., Makarov, V., Verbitskiy, V., & Hubin, A. (2021). Theoretical Studies of the Rectilinear Motion of the Axis of the Locked Wheel After Braking the Vehicle on the Uphill. In Mathematical Modeling and Simulation of Systems (MODS'2020) Selected Papers of 15th International Scientific-practical Conference, (pp. 69–81). doi: 10.1007/978-3-030-58124-4_7 (in English).
dc.relation.referencesen3. Bogomolov, V. A., Klimenko, V. I., Leontiev, D. N., Ponikarovska, S. V., Kashkanov, A. A., & Kucheruk, V. Y. (2021). Plotting the adhesion utilization curves for multi-axle vehicles. Bulletin of the Karaganda university. 1(101): 35–45. doi: 10.31489/2021Ph1/35-45 (in English).
dc.relation.referencesen4. Leontiev, D., Klimenko, V., Mykhalevych, M., Don, Y., & Frolov, A. (2019). Simulation of working process of the electronic brake system of the heavy vehicle. In Mathematical Modeling and Simulation of Systems: Selected Papers of 14th International Scientific-Practical Conference, (pp. 50–61). doi: 10.1007/978-3-030-25741-_6 (in English).
dc.relation.referencesen5. Diachuk, M., Lykhodii, O., Leontiev, D., Ryzhykh, L., & Aleksandrov, Y. V. (2022). Dynamic modeling of semitrailer trucks equipped by steered wheels. Journal of Mechanical Engineering and Sciences, 16(1), 8691–8705. doi: 10.15282/jmes.16.1.2022.04.0687 (in English).
dc.relation.referencesen6. The Improvement Brake’s Qualities of Vehicle by Developing the Method of the Choosing Frictional Pairs of the Brakes Mechanisms (2019). Retrieved from: https://www.sae.org/publications/technical-papers/content/2019-01-2145/ (in English).
dc.relation.referencesen7. Gudz, G., Zakhara, I., Voitsikhovska, T., Vytvytskyi, V., & Ropyak, L. (2022, September). Temperature Distribution in Parts of the Vehicle Disk Brake. In Advanced Manufacturing Processes IV: Selected Papers from the 4th Grabchenko’s International Conference on Advanced Manufacturing Processes, (pp. 517–529). doi:10.1007/978-3-031-16651-8_49. (in English).
dc.relation.referencesen8. Hudz H. S., Hlobchak M. V. & Zakhara I. Ya. (2018). Teplovyi rozrakhunok dyskovykh halm avtomobiliv na tsyklichnykh rezhymakh roboty [Thermal calculation of car disc brakes in cyclic modes of operation]. Lviv: HALYCh PRES (in Ukrainian).
dc.relation.referencesen9. Yedyni prypysy shchodo ofitsiinoho zatverdzhennia transportnykh zasobiv katehorii M, N ta O shchodo halmuvannia [Uniform prescriptions for the approval of vehicles of categories M, N and O with regard to braking]. (2004). DSTU UN/ECE R 13-09:2004 from 01th Aprile 2004. Kyiv (in Ukrainian).
dc.relation.referencesen10. Hudz, H. S., Hlobchak, M. V. & Ostashuk, M. M. (2018). Rozpodil teplovykh potokiv v elementakh dyskovykh halm avtomobiliv [Distribution of heat flows in the elements of disc brakes of cars]. Lviv: KINPATRI LTD (in Ukrainian).
dc.relation.referencesen11. Hilchuk, A. V., Khalatov, A. A. & Donyk,T. V. (2020). Teoriia teploprovidnosti [Theory of thermal conductivity]. Kyiv: National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" (in Ukrainian).
dc.relation.referencesen12. Hudz, H. S., Herys, M. I., Hlobchak, M. V., & Klypko, O. R. (2021). Porivnialna otsinka barabannykh i dyskovykh halm avtomobilnykh kolis za enerhoiemnistiu [Comparative assessment of drum and disc brakes for car wheels by energy capacity]. Naukovyi visnyk NLTU Ukrainy [Scientific Bulletin of UNFU], 31(6), 74-78. doi: 10.36930/40310611 (in Ukrainian).
dc.relation.referencesen13. Tryshevskyi, O. I., Saltavets, M. V., & Vorobiov, D. S. (2019). Metodyka rishennia zvorotnykh zadach teploprovidnosti [Technique of solution of reverse tasks of heat conduction]. Visnyk Natsionalnoho tekhnichnoho universytetu "Kharkivskyi politekhnichnyi instytut" [Bulletin of the National Technical University "Kharkiv Polytechnic Institute"], 31(1306), 81–86 (in Ukrainian).
dc.relation.referencesen14. Shcherbakov, V. K. & Lebed, N. L. (2020). Matematychne modeliuvannia teplofizychnykh protsesiv [Mathematical modeling of thermophysical processes]. Kyiv: National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" (in Ukrainian).
dc.relation.referencesen15. Metallicheskie poroshki i poroshkovye materialy. Retrieved from: https://www.studmed.ru/babich-bnvershinina-ev-glebov-va-i-dr-metallicheskie-poroshki-i-poroshkovye-materialy_6793f5a8720.html (in Russian).
dc.relation.urihttps://www.sae.org/publications/technical-papers/content/2019-01-2145/
dc.relation.urihttps://www.studmed.ru/babich-bnvershinina-ev-glebov-va-i-dr-metallicheskie-poroshki-i-poroshkovye-materialy_6793f5a8720.html
dc.rights.holder© Національний університет „Львівська політехніка“, 2023
dc.rights.holder© H. Hudz, M. Hlobchak, 2023
dc.subjectавтотранспортний засіб
dc.subjectбарабанний гальмовий механізм
dc.subjectрежими випробувань I
dc.subjectкоефіцієнт розподілу теплових потоків
dc.subjectтеплова модель
dc.subjectmotor vehicle
dc.subjectdrum brake mechanism
dc.subjecttest modes I
dc.subjectheat flow distribution coefficient
dc.subjectthermal model
dc.titleThe influence of important factors on the distribution of heat flows in elements of drum brakes of vehicles
dc.title.alternativeВплив вагомих чинників на розподіл теплових потоків в елементах барабанних гальм транспортних засобів
dc.typeArticle

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Transport Technologies. – 2023. – Vol. 4, No. 1