TO THE QUESTION OF CALCULATION AND DESIGN OF DIFFERENT TYPES OF DISKS FOR THE SUBJECTS OF MOTOR VEHICLES
Journal Title: Проблеми тертя та зношування - Year 2018, Vol 80, Issue
Abstract
In disk-block brakes use both solid and self-ventilated discs with a developed system of venti-lation holes and channels in the body of the disc with polished and matte its side surfaces. These surfaces interact with high-speed streams of washing air during vehicle traffic, thereby reducing the energy loading of brake discs with cooling elements on their friction belts holes and grooves angled and fan-shaped. However, the cooling capacity of the self-ventilated disc is reduced at high vehicle speeds through increase in the static pressure of the washing air Ac-cording to the developed method for assessing the effectiveness of a self-ventilated disk In the first stage, in the mode of movement and braking of the lorry, the ratio of the total area of the ventilation openings to the reduced area of the ventilation duct is checked. In the second stage, the stress state of the constituent elements of the serial self-ventilated brake disc. On the third stage, the laws of influence of coefficients mutual overlapping of friction pairs of a mo-tor vehicle brake. At the fourth stage, the efficiency of the cooling elements of self-ventilated brake discs, whose friction pairs are equipped with thermocouples with thermoelectrons con-nected to the recording equipment, in the modes of movement and braking of a freight vehi-cle, are checked by calculation and experimental means and the relationships are checked. Thus, the possibility of obtaining rational parameters of various types of brake discs, based on their thermal resistance, is illustrated. The selection of various types of brake discs is made from the condition of energy loading of the friction belts and the coefficient of thermal con-ductivity that corresponds to their materials.
Authors and Affiliations
M. V. KINDRACHUK, A. I. VOLCHENKO, V. Y. MALYK, D. YU. ZHURAVLOV, V. S. VYTVYTSKIJ
Keywords
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- EP ID EP434546
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