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本文讨论了渐开线正齿轮在弹流润滑条件下啮合效率的计算方法。计算时采用了弹流接触摩擦拖曳力的简化计算技术来估算轮齿间的滑动摩擦系数,并考虑到用滚动摩擦力来计算接触点的瞬时啮合效率及一个啮合循环的总效率。计算结果表明,采用短齿虽重合度下降,但啮合效率提高;若将齿数增加,重合度增加,效率也随之提高。载荷力矩增大时,摩擦系数增大而效率降低。速度的改变,在某一范围内,对效率影响不大,而当速度超出使摩擦系数开始降低的范围时,效率将有所提高。
This article discusses the calculation method of the meshing efficiency of involute spur gear under the conditions of elastohydrodynamic lubrication. The calculation of the simplified calculation of the contact friction drag force of the EHF was used to estimate the coefficient of sliding friction between teeth and the rolling friction was taken into account to calculate the instantaneous meshing efficiency of the contact point and the total efficiency of a meshing cycle. The calculation results show that although the coincidence degree of short teeth decreases, the meshing efficiency increases; if the number of teeth increases, the coincidence degree increases, and the efficiency also increases. When the load moment increases, the friction coefficient increases and the efficiency decreases. The change in speed, within a certain range, has little effect on efficiency and will increase when the speed exceeds the range that begins to reduce the coefficient of friction.