ЕКСПЕРИМЕНТАЛЬНІ ДОСЛІДЖЕННЯ ЕНЕРГОНАВАНТАЖЕНОСТІ ПАР ТЕРТЯ ДИСКОВО-КОЛОДКОВИХ ГАЛЬМ ТРАНСПОРТНИХ ЗАСОБІВ (частина третя)

The friction process in metal-polymer friction pairs of disk brakes is related to high-energy phenomena. For its implementation, it is necessary to supply a lot of energy from outside. The tribosystem is considered to be electro- and thermal-dynamically stable when it has a minimum reserve of internal energy. Thus, in order to ensure electro-dynamic and, as a consequence, thermal-dynamic conditions for the operation of the tribounit, it must dissipate the supplied thermal energy so that the materials of the friction pads do not reach the allowable surface temperature. This thermodynamic state is the criterion for stabilizing the process of friction and wear. At the same time energy dissipation proceeds through mechanical, physical and chemical processes that occur in the surface and near-surface layers of metal-polymer friction pairs of the disk brake. However, this is not enough and therefore the friction pairs of the disk brake must be cooled by counter flows of air when the vehicle is moving. In the materials of the article, the energyloading of the serial brake discs and with the cooling elements of self-ventilated brake discs used in the subcategories of trucks is estimated. The efficiency of forced air cooling of brake friction pairs of vehicles is established. In this publication, the following questions are considered: features of carrying out of experimental researches of disk brakes of vehicles; means for carrying out experimental researches of disk brakes; results of the assessment of the energyloading of friction pairs of disk brakes of vehicles.