齿轮热胶合承载能力数值计算方法研究

建立了时域内高速重载齿轮系统热平衡状态分析模型,推导了齿面温升公式,通过数值计算方法得到了接触点温度随时间的变化规律以及闪温沿啮合线的分布规律. 建立了符合实际工况的热弹流理论分析模型,将本体温度作为初始温度进行求解,以界面最高温升作为接触点闪温,得到了接触点的温度场、闪温以及沿啮合线的闪温分布,获得了沿啮合线的膜厚比,最后综合比较分析了Blok理论和热弹流理论. 结果表明:文中两种数值方法所求闪温与Blok闪温十分接近,热弹流法从理论上来讲更符合实际情况. 热弹流计算结果可以同时得到齿面闪温和油膜厚度等参数,为热胶合强度设计和校核提供更多的信息. 

Research on Gear System Scuffing Load Capacity and Its Numerical Calculation Methods

A thermal equilibrium analysis model for high-speed and heavy-load gear systems in time domain was established. The temperature rise formula of tooth surface was deduced and the rules of temperature varied over time at contact point as well as flash temperature distribution along action line were studied with numerical method. A thermal elastohydrodynamic lubrication (TEHL) analysis model which was more appropriate for actual conditions was proposed. In this model, the bulk temperature was chosen as the initial temperature and the maximum temperature rise of contact point were the flash temperature of contact point. The flash temperature and film thickness ratio distribution along action line were obtained. Blok theory and TEHL theory were comprehensively analyzed at last. The results show that the flash temperature solved with two numerical methods in this paper is very close to Blok flash temperature; and the TEHL theory is closer to the actual situation in theory. The results solved by TEHL theory could provide flash temperature and film thickness as well as other parameters to design and check the scuffing load capacity.