Authors: A.A. Volosatov, D.A. Panasenkov, G.A. Arutyunyan, V.Yu. Sadovets, S.D. Dubinkin

Title of the article: Modeling of thermodynamic processes in disc brakes of mining machinery using the finite element method (part 2)

Year: 2024, Issue: 3, Pages: 78-87

Branch of knowledge: 2.5.6. Engineering technology

Index UDK: 629.017:629.018+629.3.027.3

DOI: 10.26730/1999-4125-2024-3-78-87

Abstract: The brake system of a dump truck is one of the main ones affecting the safety of work at the quarry. Disc brakes on dump trucks with a load capacity of more than 90 tons are used as emergency brakes, or to stop it completely. Overheating of the disc mechanisms leads to deterioration of the braking characteristics of the dump truck, and therefore to a decrease in safety at the enterprise. In this article, the second stage of a numerical method has been developed to predict the temperature change of each element of the braking mechanism during emergency braking. The method consists of two stages. The results of the first stage were used as the initial conditions for the second stage. At the second stage, the distribution of thermal energy throughout the braking system is determined. Using this method, a study was conducted on a specific brake design. The simulation results made it possible to identify areas with increased thermal load. The proposed numerical method makes it possible to efficiently and economically evaluate the thermomechanical behavior of the braking system at an early stage of development. As a result of the study, it was found that the probability of overheating of the brake fluid during emergency braking is low. After the dump truck stops completely, the seals of the brake pistons heat up significantly due to thermal radiation from the surface of the disc. This may lead to a decrease in the tightness of the hydraulic system. In order to further develop the study of heating of braking mechanisms, it is planned to study in more detail the effect of convective heat transfer during braking, the effect of the dependence of the coefficient of friction on temperature, and also consider a larger number of braking modes. Thus, this study will cover a broader area of problems

Key words: dump truck brake mechanism emergency braking friction heating FEM coupled thermomechanical process

Receiving date: 15.05.2024

Approval date: 29.05.2024

Publication date: 28.06.2024

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