摆动活齿传动齿面闪温研究

根据摆动活齿传动的啮合原理,利用摩擦学、赫兹弹性接触等理论,研究了弹流润滑下活齿与内齿圈之间的摩擦因数的计算方法,分析了传动过程中摩擦因数的时变规律.在对活齿与内齿圈啮合接触时接触带半宽进行分析计算的基础上,应用Blok闪温理论建立了弹流润滑下摆动活齿传动齿面闪温计算模型.通过MATLAB编程求解了摆动活齿传动在一个啮合周期内齿面闪温沿啮合线的分布规律,分析了齿面闪温对输入功率、转速、摆动活齿半径和活齿数等参数的敏感性.算例表明,当活齿与内齿圈在齿廓曲线拐点处啮合时齿面闪温达到最大值.研究结果对进一步研究摆动活齿传动齿面抗胶合承载能力、热应力等有重要意义.

Study on Flash Temperature of Swing Movable Teeth Transmission

According to the theory of swing movable teeth meshing, a calculation method of friction coefficient between swing movable teeth and the internal gear under elastohydrodynamic lubrication was studied by using the theories of Hertz contact,tribology. And the time-varying discipline of friction coefficient in the drive process was analyzed. Meanwhile, According to the theory of Blok Flash temperature theory, the calculation model of flash temperature in a meshing period under elastohydrodynamic lubrication was built based on the calculation of the contact half-width.The distribution of flash temperature along the meshing line in the drive process was analyzed through the MATLAB programming. Sensitivity analysis of the flash temperature to relevant variables was conducted to investigate the effects of the variations of input power, speed, swing movable tooth radius and teeth number on flash temperature.The example analysis results indicate that near the inflection point of internal gear profile curve, the flash temperature is the maximum.The research results may be helpful for studying the scuffing strength of tooth surface and thermal stress.