矿用湿式多盘制动器温升特性研究

Research on temperature rise characteristics of mine-used wet multi-disc brakes

针对矿用车辆在紧急制动工况下高强度制动会引起的制动失效问题,使用Ansysworkbech软件对摩擦盘在紧急制动工况下的温度变化进行分析,并通过台架试验验证仿真分析的有效性。考虑材料因素对制动器温升特性的影响,利用正交试验和交互作用分析确定影响摩擦盘温升最显著的材料因素以及各因素之间的交互作用对温升的影响。结果表明:摩擦盘温升随热膨胀系数和弹性模量的增加而增加,而随着导热系数的增加有所下降;影响摩擦盘温升的最显著因素为热膨胀系数,其次为导热系数,最后为弹性模量;在多因素交互分析中,弹性模量与热膨胀系数的交互作用以及导热系数与热膨胀系数的交互作用显著,而弹性模量与导热系数具有交互作用,但对温升影响较小。

In order to deal with the brake failure caused by high intensity braking of mining vehicles under emergency braking condition,Ansysworkbech software was used to analyze the friction disc temperature change.The effectiveness of simulation analysis was verified by bench test.Considering the influence of material factors on the brake temperature rise characteristics,orthogonal test and interaction analysis were carried out to determine the significant material factors that affect the friction disc temperature rise.Also,the influence of interaction among factors on the temperature rise can be discovered.The results show that the temperature rise of the friction disc increases with the increase of the thermal expansion coefficient and elastic modulus,but decreases with the increase of the thermal conductivity.In addition,the very factors affecting the temperature rise are the thermal expansion coefficient,the thermal conductivity and elastic modulus in descending order.In the multi-factor interaction analysis,the interaction between the elastic modulus and the thermal expansion coefficientare are significant,as well as the interaction between the thermal conductivity and the thermal expansion coefficient.What’s more,the elastic modulus interacts with the thermal conductivity,but has little effect on the temperature rise.