ЕНЕРГОНАВАНТАЖЕНІСТЬ САМОВЕНТИЛЬОВАНИХ ДИСКІВ З ЕЛЕМЕНТАМИ ОХОЛОДЖЕННЯ ГАЛЬМ ТРАНСПОРТНИХ ЗАСОБІВ (ЧАСТИНА I)

Abstract

У матеріалах статті дана оцінка енргонавантаженості самовентильованих дисків при циклічному та тривалому режимах випробовувань дисково-колодкових гальм транспортних засобів. Крім того встановлено вплив конструктивних параметрів удосконалених гальмівних дисків на ефективність вимушеного повітряного охолодження, а також охарактеризовано перший та другий етапам дослідження самовентильованих дисків. In the materials of the article the estimation of energy load of self-ventilated disks at cyclic and long modes of tests of disk and pad brakes of vehicles is given. In addition, the influence of design parameters of advanced brake discs on the efficiency of forced air cooling is established, and the first and second stages of the study of self-ventilated discs are characterized. The substantiation of the choice of design parameters of self-ventilated brake discs with cooling elements on their friction treadmills taking into account the allowable energy load and stress state to increase the cooling efficiency of friction pairs of disc brake pads of trucks is carried out. The relationship between the design parameters of the cooling elements, ie grooves and vents made on the treadmills of friction of self-ventilated brake discs with the average cross section of their ventilation duct, as well as the intake hole with the lower cross section of the ventilation duct, and the relationship with the lower from the top to ensure efficient operation of the entire ventilation system. In continuous and self-ventilated brake discs of disc-pad brakes of vehicles there are ratios of geometrical parameters. But at the same time for self-ventilated brake discs, in which the ribs are placed between the semidiscs. The latter form channels that are washed by oncoming air currents when the vehicle is moving. Unfortunately, it is still unknown how to construct the "stuffing" of a self-ventilated disk. Thus, it is necessary to establish the relationship between the design parameters of the cooling elements, ie grooves and vents made on the treadmills of self-ventilated brake discs with the middle cross section of their ventilation duct, and the intake hole with the lower cross section of the ventilation duct, and the relationship with the lower the upper section of the ventilation duct to ensure efficient operation of the entire ventilation system.