高速动车组齿轮箱稳态温度场分析

高速动车组齿轮箱运行时会产生大量的热使其温度场平衡温度升高导致其出现热轴、箱体表面出现裂纹等故障现象,为了获得齿轮箱温度场分布规律,对某型高速动车组齿轮箱进行稳态温度场分析。建立了齿轮箱稳态温度场数学模型并确立了边界条件,通过有限元法对齿轮箱温度场进行数值模拟分析,并与试验结果对比以验证建立模型的可靠性。结果表明:小齿轮两个圆柱滚子轴承处温度最高,出现热轴故障的可能性最大;温度以热源为中心向周围扩散,依次递减;仿真结果与试验结果误差小于3.36%,建立的仿真模型可有效预测齿轮箱温度分布。通过分析获得齿轮箱温度场的分布规律,为齿轮箱故障分析和润滑流道结构改进提供理论依据。

The Analysis of Stable Temperature Field on High Speed Train Gearbox

High speed train gearbox will produce a lot of heat when it operating. The equilibrium temperature of temperature field will rising, as well as appearing hotbox and crack phenomenon on gearbox surface. in order to achieve the temperature distribution of the gearbox, the stable temperature field on high speed train gearbox has been analyzed. The mathematical model of gearbox stable temperature field has been established as well as the boundary conditions, the finite element method is employed to simulate the gearbox temperature field. The calculation result is compared with the experimental result to verify the reliability of the result. the research result shows that the highest temperature located at the two cylindrical roller bearings of small gear, the possibility of appearing hotbox is the biggest. The temperature spreads around the heat source, decreasing in turn. the relative error between measurement result and simulation result less than 3.36 percent, the model is effective. the distribution of temperature has been achieved through analysis. the result provides theoretical basis for fault diagnosis and optimizes the structure of lubricating flow channel.