摩擦片打滑过程中的热传导模型

Heat Transfer Model of Friction Sheets during Skidding

摩擦片打滑时 ,摩擦偶的实际接触是在摩擦表面的微凸体之间进行的 ,摩擦热的产生具有微区瞬间的特点 ,从而引起摩擦面局部温度过高。根据摩擦片打滑的特点和导热理论 ,建立了接触点处的热传导模型 ,依该模型分析了接触区域温度分布的特点 ,得知温度沿材料厚度方向呈线性分布 ,接触点瞬时温度与单位面积摩滑功率和打滑时间成正比。通过验证 ,用该模型计算所得的结果与文献所得结论相符 。

Actual contacts of friction couple during the skidding of friction sheets are among the decline protruding bodies on the friction surface. Local temperature on the friction surface is excessively high due to the transient friction heat. A heat transfer model of the contacts was put forward according to the skidding characteristics of friction sheets and the heat transfer theory. The temperature distribution of the contacts was analyzed by the model. It is shown that the temperature distribution along the lines of material thickness is linear and the transient temperature of the contacts is in direct proportion to the skid power of unit area and the skid time. Results calculated by the model are consistent with those in previous literatures, and the model reflects the actual temperature on the friction surface better than other models.