Liu Xingchen, Behdinan Kamran
Advanced Research Lab for Multifunctional Lightweight Structures (ARL-MLS), Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada.
Sci Rep. 2021 Jan 14;11(1):1476. doi: 10.1038/s41598-020-79986-5.
The front-end accessory drive belt drive system is a critical component in the vehicle engine. To avoid thermal deterioration under static state operating conditions, the thermal distribution for the belt drive system at each condition must be determined in an efficient manner. Due to the numerical approach is not feasible to address this concern because of its high computational cost, this paper proposes a reliable and efficient novel analytical thermal model to achieve this goal. This work develops the state-of-the-art heat transfer ordinary differential equations (ODEs) describing the thermal flow and heat dissipations on the complex structures of pulleys. Then it integrates these ODEs with heat transfer governing equations of the belt and heat exchanges to establish an innovative system of equations that can be solved within a few seconds to provide temperature plots. Moreover, experiments were conducted on a dynamometer to verify the accuracy of the proposed model under a wide range of conditions. The results indicate that the measured temperatures are in good agreement with the corresponding analytical results. Owing to its efficiency, the proposed model can be integrated with other mechanical characterizations of the belt drive system in terms of design, optimization, and thermal fatigue analyses.
前端附件驱动皮带传动系统是车辆发动机中的关键部件。为避免在静态运行条件下发生热劣化，必须以高效的方式确定皮带传动系统在每种工况下的热分布。由于数值方法因其高计算成本而无法解决这一问题，本文提出了一种可靠且高效的新型解析热模型来实现这一目标。这项工作推导了描述皮带轮复杂结构上热流和热耗散的最新传热常微分方程（ODEs）。然后将这些ODEs与皮带的传热控制方程和热交换相结合，建立了一个创新的方程组，该方程组可在几秒钟内求解以提供温度分布图。此外，在测功机上进行了实验，以验证所提出模型在广泛工况下的准确性。结果表明，测量温度与相应的解析结果吻合良好。由于其高效性，所提出的模型可在皮带传动系统的设计、优化和热疲劳分析等方面与其他机械特性相结合。
