高速列车齿轮箱内部流场模拟研究

Simulation Study on Internal Flow Field in Gearbox High-speed Train

以高速列车齿轮箱为研究对象,对其运行过程中内部润滑油流场进行数值模拟分析。利用Pumplinx软件采用RNG k-ε湍流模型和齿轮箱内部流场的VOF两相流模型齿轮箱进行数值仿真,同时对齿轮端面节点润滑油浓度进行监测,以获得准稳态下齿轮端面润滑油浓度和齿轮箱有效润滑油浓度变化规律。研究结果表明:在准稳态下,齿轮副转速增加,齿轮箱内有效润滑油浓度先升高后趋于稳定,驱动齿轮端面润滑油浓度增大,从动齿轮端面润滑油浓度减小;润滑油初始油量增加,齿轮箱内有效润滑油浓度近似线性增加,驱动和从动齿轮端面准稳态润滑油浓度逐渐增加。

With the gearbox of high-spped train as the reserch object,the numerical simulation of the internal lubricating oil flow field in operation was analyzed.By Pumplinx software,RNG k-εturbulent model and the VOF two-phase flow model of the internal flow of the gearbox were applied to conduct numerical simulation,and the lubricating oil concentration of the key nodes was monitored to abtain the variation law of lubricating oil concentration of gear end face and effective field lubricating oil concentration of gearbox under quasi-steady state.The results show that under quasi-steady state,with the increase of gear pair rotational speed,the effective lubricating oil concentration in the gearbox increases first and then tends to be stable,and along with the increase of the lubricating oil concentration at the driving gear end,the lubricating oil concentration at the driven gear end decreases.With the increase of the initial lubricating oil,the effective lubricating oil concentration in the gearbox witnesses an approximate linear growth,and the quasi-steady lubricating oil concentration of the driving and driven gear faces increases gradually.