【摘要】 提出了基于动力学的渐开线齿轮啮合效率计算模型。通过求解动力学方程获得任意啮合时刻的齿面动载荷、摩擦力和考虑到波动的表面速度,并计算瞬时输入功率和损耗功率后可得瞬时啮合效率。通过计算一个啮合周期内的总输入功和损耗功,可得到平均啮合效率。研究了不同载荷分配模型、最大修形量、转速和转矩等对啮合效率的影响。结果表明:为准确估算齿轮啮合功率损失和啮合效率,应建立较准确的载荷分配模型;对齿顶进行适当修形能有效减小双齿啮合区的摩擦损耗,从而提高齿轮传动效率;转速和转矩平均啮合效率有较大影响。更多还原

【Abstract】 A meshing efficiency calculation model of spur gear was proposed based on the dynamics of gears.Tooth dynamic load,friction force and surface velocity considering fluctuation were gained by solving dynamics equation.Then,the instantaneous meshing efficiency would be obtained by calculating instantaneous input power and power losses.The average meshing efficiency was achieved by evaluating the total input work and loss work in one mesh period.The influence of different load distribution model,maximum amount of profile modification,rotational speed and input torque was also discussed.The results show that more accurate load distribution model should be established to predict power losses of gearing mesh and meshing efficiency.Appropriate tip relief helps to reduce friction power losses of double teeth contact and improve meshing efficiency.Rotational speed and input torque affect the average meshing efficiency obviously.更多还原