The sustainable exploitation of raw materials, with improved safety and increased productivity, is closely linked to the development of mechanical mining installations. Mine hoists are designed for the transport of material, equipment and personnel between the mine surface and the underground. The mine hoist braking system is of paramount importance in its safe operation. Thus, for both drum and disc brake systems, the temperature of the friction surfaces is important for ensuring efficient braking, as exceeding the temperature threshold causes a decrease in the braking capacity. In this paper we present a numerical calculation model for the temperature of the braking disc of a mine hoist in the case of emergency braking. A real-scale model was built, based on the cable drive wheel and disc brake system of a hoisting machine used in Romania. Real material characteristics were imposed for the brake discs, the cable drive wheel and the brake pads. The simulation was performed for decelerations of 3, 3.5, 4 and 4.5 m/s². The analysis shows that regardless of the acceleration and time simulated, the disc temperature reaches its maximum after 1.35 s of emergency braking. This value does not exceed the 327 °C limit where, according to previous studies, the braking power starts to fade. It means that the emergency braking is safe for the acceleration and masses under consideration, in the case of the studied mine hoist.

中文翻译：

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矿井提升盘式制动器温度的数值模拟，以确保更安全的运行

可持续开采原材料，提高安全性和提高生产率与机械采矿设备的开发紧密相关。矿用提升机设计用于在地表和地下之间运输材料，设备和人员。矿山提升制动系统在其安全运行中至关重要。因此，对于鼓式和盘式制动系统而言，摩擦表面的温度对于确保有效制动都是重要的，因为超过温度阈值会导致制动能力下降。在本文中，我们提出了一种用于紧急制动情况下的矿用提升机制动盘温度的数值计算模型。基于罗马尼亚使用的卷扬机的电缆驱动轮和盘式制动器系统，建立了一个实际模型。制动盘，电缆驱动轮和制动片具有真实的材料特性。对3、3.5、4和4.5 m / s的减速度进行了仿真²。分析表明，不管模拟的加速度和时间如何，在紧急制动1.35 s后，制动盘温度均达到最高。该值没有超过327°C的极限，根据先前的研究，在该极限处制动功率开始衰减。这意味着在研究的矿井提升机中，紧急制动对于所考虑的加速度和质量是安全的。