机车传动齿轮箱温度场数字仿真

机车齿轮箱工作过程中,由于齿轮啮合传动功率损失、轴承传动表面摩擦生热、齿轮搅油功率损失,使得齿轮箱内部及箱体产生了温升。为了计算齿轮箱内温度场,以某型大功率机车传动齿轮箱为研究对象,建立了齿轮箱传热数值仿真计算模型。通过分析齿轮箱的发热机理和对流换热情况,确定了箱体面壁对流换热系数,计算齿轮箱结构生热,并建立热平衡能量方程。使用FLUNENT软件,模拟腔内油气混合物的实际运动情况,求解稳态热平衡能量方程。分析齿轮箱温度分布情况,研究不同转速及不同浸油深度下,齿轮箱温度分布规律变化与其相互关系。研究结果表明:齿轮箱温度场呈现以热源为中心,向外辐射温度递减,同时,随着转速与浸油深度的提高,齿轮箱热平衡温度递增,并在一定范围内呈线性关系。

Temperature Field Digital Simulation of Transmission Gear for locomotives

The performance and structural elements of Locomotive Transmission gearbox has a close relationship with the heat intensity.In many cases,the damage critical components of Transmission gearbox are associated with excessive heat load and uneven heat.In this paper,the heat transfer model of the Transmission gearbox for a certain type of High-power locomotives is established.By analyzing the heating mechanism,heat power losing and heat transfer coefficiency different condition,the Heat balance energy equation is established.Simulating actual fuel mixture chamber movement,solving the heat balance energy equation of steady-state on the software FLUNENT,the distribution of the temperature field for the Transmission gearbox in different speeds and different immersion is studied.This work can effectively predict the temperature field of Transmission gearbox and provide theoretical guidance in the structure optimization and enhance heat dissipation for the Transmission gearbox.