Features of the estimation of the intensity of heat exchange in self-ventilated disk-shoe brakes of vehicles

Authors

DOI:

https://doi.org/10.15587/1729-4061.2019.154712

Keywords:

disk-shoe brake, self-ventilated brake disk, friction belt, friction pair, heat-exchange surface, coefficients, heat emission, heat transfer

Abstract

Analysis of the energy load of a cargo vehicle self-ventilated disk-brake system, which significantly affects the operational parameters of its friction pairs is made. Plastic deformation of the disk friction belts can be observed under cyclic loading of the brake friction pairs, and the deformation process is aggravated by the fact that the yield strength of the material drops in their local zones. Due to plastic friction during compression of the disk friction belts heated zones, therefore they bulge, further leading to the formation of microcracks.

The research is based on the fact that during the vehicle braking moment, the intensity of heat transfer from the outer and inner, matte and polished surfaces of the self-ventilating braking disk by convection is much lower than the intensity of heat dissipation processes in the right and left body of the half-disks under heat conduction. This is explained by the fact that the rate of heating is ten times higher than the rate of forced air cooling.

As a result of the research, the regularities of the thermal conductivity change in the half-disk side surface, the inverse of which is the thermal resistance of the half-disk were revealed. The design and heat transfer processes in the self-ventilated disk-shoe brake of the vehicle are considered. The intensity of heat transfer of a vehicle's self-ventilated brake disk is investigated in relation to speed and with account of heat transfer coefficients from external and internal surfaces of the disk. The influence on the intensity of the heat transfer process on the surface areas through the disk thickness is established

Author Biographies

Nikolaj Volchenko, Kuban State Technological Universit Moscowskaya str., 2, Krasnodar, Russia, 350067

PhD, Associate Professor, Head of Department

Department of Car Service and Materials Science

Aleksandr Volchenko, Ivano-Frankivsk National Technical University of Oil and Gas Karpatska str., 15, Ivano-Frankivsk, Ukraine, 76019

Doctor of Technical Science, Professor

Department of technical mechanics

Dmitriy Volchenko, Ivano-Frankivsk National Technical University of Oil and Gas Karpatska str., 15, Ivano-Frankivsk, Ukraine, 76019

Doctor of Technical Science, Professor

Department of Oil Extraction

Pavel Poliakov, Kuban State Technological University Moscowskaya str., 2, Krasnodar, Russia, 350067

PhD, Associate Professor

Department of Car Service and Materials Science

Volоdymyr Malyk, State Higher Educational Institution «Drogobych College of Oil and Gas» Hrushewskoho str., 57, Drohobych, Ukraine, 82100

PhD, Associate Professor

Dmitriy Zhuravliov, Ivano-Frankivsk National Technical University of Oil and Gas Karpatska str., 15, Ivano-Frankivsk, Ukraine, 76019

PhD, Associate Professor

Department of Technical Mechanics

Vasyl Vytvytskyi, Ivano-Frankivsk National Technical University of Oil and Gas Karpatska str., 15, Ivano-Frankivsk, Ukraine, 76019

Postgraduate student

Department of Technical Mechanics

Petr Krasin, Kuban State Technological University Moscowskaya str., 2, Krasnodar, Russia, 350067

Postgraduate student

Department of Car Service and Materials Science

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Published

2019-01-22

How to Cite

Volchenko, N., Volchenko, A., Volchenko, D., Poliakov, P., Malyk, V., Zhuravliov, D., Vytvytskyi, V., & Krasin, P. (2019). Features of the estimation of the intensity of heat exchange in self-ventilated disk-shoe brakes of vehicles. Eastern-European Journal of Enterprise Technologies, 1(5 (97), 47–53. https://doi.org/10.15587/1729-4061.2019.154712

Issue

Section

Applied physics