液力变矩-减速装置制动特性流场分析

摘要

为准确获取液力变矩-减速装置的制动特性,建立了某型液力变矩-减速装置制动工况下各叶轮及辅助液力减速器流道模型。运用CFD技术分析了液力变矩-减速装置泵轮、涡轮闭锁状态下在1000～2000r/min转速时的各叶轮及辅助液力减速器流道内部速度流线、压力场分布特点,并进行了制动特性仿真计算。仿真结果与实验结果对比计算误差在10%以内,表明仿真方法和仿真模型准确、可靠。%In order to obtain the brake performance of the hydrodynamic tractor-retarder assembly,a numerical simulation model was build to study the pressure and velocity distributions of internal flow field during brake process,and brake performance curves of different rotating speed were drawn by CFD analysis.The flow field analysis results show that the calculation error of the braking torque was less than 10% by comparison with experimental data,showing the simulation method and the simulation model are accurate and reliable.