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基于弹性流体动力润滑理论,建立了内啮合齿轮传动的弹流润滑模型。针对行星齿轮变速传动的两种工况,求出内齿轮和行星齿轮内啮合时各个啮合点的最小油膜厚度,绘出沿啮合线的弹流油膜厚度分布图。经过对膜厚图的分析得知,在行星轮和内齿轮啮合的节点靠近行星轮齿根处是油膜厚度的最薄弱处,且变速传动时,低速传动的内啮合工况润滑状态较差;经计算对比得出提高润滑油的粘度,可以增大润滑油膜的厚度;增大压力角提高油膜厚度的效果明显。提高齿轮啮合的油膜厚度对改善齿轮的润滑状态,降低齿轮的生产成本,具有实际使用价值。
Based on the theory of elastic fluid dynamic lubrication, an EHL model of internal gear transmission is established. Aiming at the two conditions of the planetary gear transmission, the minimum film thickness at each meshing point of the internal gear and the planetary gear is obtained. The distribution of the oil film thickness along the meshing line is plotted. After analyzing the film thickness diagram, we know that the meshing node of the planet gear and the internal gear is the weakest part of the oil film thickness near the tooth root of the planetary gear, and the lubrication condition of the internal meshing condition of the low speed transmission is poor at the time of variable speed transmission; Comparing the results obtained by calculating the viscosity of lubricating oil can increase the thickness of lubricating oil film; increase the pressure angle to improve the effect of oil film thickness is obvious. Improve gear meshing of the film thickness to improve the lubrication of the gear state, reducing gear production costs, with practical value.