Energy loading of self-ventilated discs with cooling elements of vehicle brakes(part 2)

Skrypnyk V. S., Bekish I. O., Nishchuk V. V., Burava A. S.
Hoisting and transport equipment, 2021, №1(65)
The materials of the article give an estimate of the energy load of self-ventilated disks. In addition, the influence of design parameters of advanced brake discs on the efficiency of forced air cooling is established. The maximum temperature stresses of self-ventilated disks without and with a flange are determined, and the stress-strain state of solid and self-ventilated disks with cooling elements of disk-pad brakes of a vehicle is illustrated. A brake disc without a flange has higher volumetric temperatures than a disc with a flange. As for the temperature gradients, they are larger in the design of the disk with a flange and, as a consequence, higher temperature stresses. Ventilation holes and grooves are performed on the friction treadmills of self-ventilated brake discs to intensify the forced cooling of the brake friction pairs in the modes of movement and braking of the vehicle. Intensify the processes of washing with counterflows of air matte and polished, outer and inner surfaces of the self-ventilated brake disc brake is possible due to the cooling elements. It is important to note that in a disk without a flange at change of the grooves and the openings located on its working surface by a fan, on a variant of an arrangement at an angle, temperature stresses decrease. According to the results of calculation and experimental stages, the efficiency of forced air cooling due to the use of holes and grooves located at an angle and fan on the treadmills of solid and self-ventilated discs in the brakes of different categories of vehicles is proved and substantiated.
vehicle, disc-pad brake, friction pair, friction pad, disc friction treadmill, holes and grooves, self-ventilated brake disc.
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