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针对某四行程四缸内燃机曲轴主轴承,考虑机体变形因素的影响,进行了曲轴轴承弹性流体动力润滑分析.计算中采用动力学法进行曲轴轴承的润滑分析,采用变形矩阵法计算油膜压力作用下轴承表面的变形.结果表明,与不考虑机体变形影响相比,计入机体变形影响时轴承轴心轨迹基本没有改变,在1个工作循环中的大部分时间轴承最大油膜压力、最小油膜厚度、端泄流量和轴颈摩擦系数几乎没有变化,仅在某些时刻附近轴承最大油膜压力略有减少,轴承最小油膜厚度略有增加.因此在计算精度要求不是非常高的情况下,曲轴主轴承润滑分析可以不考虑轴承表面因油膜压力作用产生的弹性变形的影响.
Aiming at the main crankshaft bearing of a four-cylinder four-cylinder internal combustion engine, the crankshaft bearing elastohydrodynamic lubrication analysis was carried out considering the influence of the deformation of the engine crankshaft, and the lubrication method was used to calculate the crankshaft bearing lubrication. The deformation matrix method was used to calculate the effect of oil film pressure Bearing surface deformation.The results show that compared with the effect of the deformation of the body without considering the deformation of the body, the bearing axis trajectory basically does not change, the maximum oil film pressure, the minimum oil film thickness of most of the time bearing in a working cycle, There is almost no change in the discharge flow rate and the friction coefficient of the journal, only slightly decreasing the maximum oil film pressure near the bearing at some time and slightly increasing the minimum oil film thickness of the bearing, therefore, when the calculation precision is not very high, the main bearing of the crankshaft is lubricated Analysis can not consider the bearing surface due to the impact of oil film elastic deformation.