Evaluation of weight wear of disc brake pads after test stands

Abstract

The article presents the results of the research of a railway disc brake in the evaluation of the weight wear of friction pads. The tests were carried out on a certified brake stand where the friction and mechanical characteristics of the brake are determined. The stand was additionally equipped with a thermal imaging camera to observe the contact of the pads with the brake disc. Attention was also paid to examining the influence of such parameters of the braking process as the contact surface of the pad with the disc, the thickness of the pads as a determinant of their initial wear, the pressure of the pads to the disc, braking mass and braking speed on the weight wear of the friction pads.

Model of energy consumption by brake discs of rail vehicles

“…7. Energy consumption of railway brake discs [26] Analyzing the graph presented in Fig. 7, it is concluded that the ventilation bars generate approximately 60% lower energy consumption compared to the disc with blades.…”

“…7, it is concluded that the ventilation bars generate approximately 60% lower energy consumption compared to the disc with blades. Moreover, research conducted by [26] proved that a disc with cooling rods or other thermal bridges achieves greater braking power by approximately 3% compared to a disc with blades. It should be noted that, according to work [33], forced ventilation inside the disc does not affect the lower values of temperature obtained during braking by the disc.…”

“…A similar division of energy consumption by a brake disc was presented in [26], but the calculation method was presented on brake discs that were smaller in diameter. In order to determine the energy consumed by the disc per rotation, it is necessary to use the following data, presented in Table 1, calculations were carried out for a 640×110 disc.…”

“…the first diesel shunting locomotive powered by hydrogen was presented [7,8]. Other manufacturers offer vehicles with hybrid drives [4,18,26] or electric drives [22,35] for reduced emissions.…”