离合器温度场计算中摩擦热流密度模型的比较研究

Study on the Comparison Between Two Models of Frictional Heat Flux in Calculation of Clutch Temperature Field

温度场计算是离合器设计与控制的重要依据,摩擦热模型是温度场计算准确性的关键。针对热流均布和压力均布两种主流的摩擦热流密度模型,将其分别引入离合器热分析的有限元模型,计算在持续滑摩的极端工况下温度场随时间和空间的变化过程,从温度分布云图、温度沿半径方向的变化、最高温度以及温度梯度等方面对两种模型的计算结果进行比较,给出了两种模型的适用范围。

Temperature field analysis through finite element model is important in the study of clutch design and control.The frictional heat model is the key to the calculation accuracy of temperature field.Aiming at the two main frictional heat flux models of heat flux uniform distribution and pressure uniform distribution,they are applied to FEM thermal analysis model of clutch respectively to calculate the temperature field varying process with time and space under the extreme condition of continuous sliding.Their results are compared in terms of the maximum temperature,temperature distribution and temperature gradient along the radial direction.In addition,the scope of application of the two models is given.