基于有限元的矿井盘式制动器的制动盘温度分布分析

Analysis on Temperature Distribution of Disc Brake in Mine Transportation System Based on Finite Element Method

矿井盘式制动器在制动过程中温度分布对制动效率影响明显,通过有限元仿真方法重点分析了制动盘的径向、周向与轴向温度曲线特征,研究结果表明:进入盘闸制动阶段后,摩擦副表面将会受到外部的压应力作用,导致接触表面形成热应力。受盘闸的结构特点与摩擦副的材料性能影响,制动盘的表面将会形成明显的温度梯度,导致局部应力显著增加,使盘闸的制动性能减弱。随着制动过程到达末期时,接触面将处于一个相对稳定的温升状态,同时非接触区的温度将一直呈现上升趋势。本研究成果对提高制动器的工作效率具有重要的理论价值。

The influence of temperature distribution on braking efficiency is obvious during the braking process of the mine disc brakes;therefore, characteristics of the radial, circumferential and axial temperature curves of the brake disc are analyzed emphatically through the finite element simulation method in this article. The research results show that after entering the disc braking stage, the friction pair surface will be subjected to external compressive stress, resulting in the formation of thermal stress on the contact surface. Affected by the structural characteristics of disc brake and the material properties of friction pair, an obvious temperature gradient will be formed on the surface of brake disc, which will increase the local stress significantly and weaken the braking performance of disc brake. When the braking process reaches the end, the contact surface will be in a relatively stable temperature rising state, and the temperature in the non-contact area will always show an upward trend. The research results have important theoretical value for improving the working efficiency of brake.