DOI: https://doi.org/10.32515/2664-262X.2024.9(40).2.112-118

Research of braking dynamics of a road train

Olena Zakharchuk, Victoria Kysil, Oksana Shevchuk, Natalіia Falovych, Vasyl Zakharchuk

About the Authors

Olena Zakharchuk, Associate Professor, PhD in Technics (Candidate of Technics Sciences), Western Ukrainian National University, Ternopil, Ukraine, e-mail: olenaskyba8500@gmail.com, ORCID ID: 0000-0002-4359-5644

Victoria Kysil,the recipient of higher education TA-41, Western Ukrainian National University, Ternopil, Ukraine, e-mail: kusil4321@gmail.com

Oksana Shevchuk, Associate Professor, PhD in Technics (Candidate of Technics Sciences), Western Ukrainian National University, Ternopil, Ukraine, e-mail: oksana_shevchuk84@ukr.net, ORCID ID: 0000-0001-8283-4620

Natalіia Falovych, Associate Professor, PhD in Technics (Candidate of Technics Sciences), Western Ukrainian National University, Ternopil, Ukraine, е-mail: n.falovych@gmail.com, ORCID ID: 0000-0003-1651-3022

Vasyl Zakharchuk, рost-graduate, Western Ukrainian National University, Ternopil, Ukraine, е-mail: zaharchuk100182@gmail.com

Yurii Petryshyn, рost-graduate, Western Ukrainian National University, Ternopil, Ukraine

Abstract

The article analyzes the ways to improve the operational properties of road trains, by taking into account changes in the technical condition of various systems under their operating conditions. It has been established that a significant proportion of failures that occur in tractors and trailer links of road trains in operating conditions fall on the braking and running systems, and among the main malfunctions of the braking system, violations of the optimal indicators of regulation and distribution of braking forces along the axles and sides of the road train are most often singled out. The appearance of such failures can significantly affect the stability of road trains and the safety of their use. That is why, during the service inspection of the trailer links of road trains, it is necessary to ensure compliance with the optimal indicators of the distribution of braking forces on the axles and wheels of the vehicle. A method of adjusting the braking forces on the wheels of the towing link is proposed to eliminate the on-board unevenness when it is detected in the process of servicing the braking system of the vehicle. The relationship between the magnitude of the braking moment on the wheel and the arm of applying force from the brake chamber for drum brake mechanisms with a pneumatic drive is given. The method of regulating the braking forces applied to the wheel by changing the gear ratio of the brake mechanism by changing the arm of applying the braking force from the brake chamber to the cam rotation lever is justified. This approach allows you to minimize the unevenness of the braking forces along the sides of the trailer link, which can occur as a result of deviations in the operation of the braking mechanisms, which occurs under the influence of operating conditions, for example, due to uneven wear of the brake linings on individual wheels or the appearance of deviations in the adjustment of the drive of the braking mechanisms

Keywords

stability, braking, two-link road train, normal reactions of the bearing surface, straight-line motion, curved motion

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