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Research and Optimization on Thermal Performance of Brake Disc for Ultra Deep Mine Hoist

When subjected to cyclic frictional thermal load during the emergency braking process, the brake disc of ultra-deep mine hoist generates a lot of heat, and the high temperature can decrease the brake pad's performance and even cause brake disc failure. Based on the heat conduction theory and the finite element analytic method, the3-dimentional brake disc and brake pads finite element model was built. Aiming at the thermal performance problem of brake disc, the temperature distribution under braking condition was studied for various numbers and arrangements of brake pads. The results indicate that, the temperature of friction surface rise sharply, and then drop slowly during the braking stage, and the temperature has serrated fluctuations. The max temperature of original brake disc model during the braking process is 106.1°C. Through optimization of the arrangement of brake pads, the max temperature of brake disc is 69.2°C, which is lower than that of the model increases the number of brake pads, and the distribution of temperature is more even.