考虑径向-止推润滑耦合效应的柴油机翻边轴承热弹流润滑特性研究

The flanged bearing of diesel engine consists of journal and thrust parts and the function of supporting the crankshaft and preventing its axial movement mainly depends on the lubrication performance of these two parts. In order to further analyse the lubrication characteristics of flanged bearing and improve its service performance, this paper established a thermal elastohydrodynamic lubrication analysis model of flanged bearing, which considered the coupled lubrication effect of the common interface between the radial and thrust parts and proposed the thermal continuity conditions to be satisfied in the coupled lubrication process. Based on the model, the paper explored the influence of the eccentricity of journal part and the geometry oil film clearance of thrust part on the bearing capacity and surface temperature. Through the analysis of thermal elastohydrodynamic lubrication of flanged bearings, it was necessary to consider the thermal continuity condition when considering the coupled lubrication effect of the common interface between the radial and thrust parts. With the increase of journal eccentricity, the bearing capacity and the surface temperature of each part both increased. With the geometry film thickness of the thrust part decreased, the bearing capacity of the journal part decreased, the bearing capacity of the thrust part increased significantly and the surface temperature of each part increased.