Research on lubrication performance of composite micro textured journal bearing

In order to improve the traditional way of improving the lubrication performance of journal bearing, a new and resource-saving improvement method is proposed in this paper. There is no need to change the bearing materials, use high-performance lubricants, or improve machining accuracy. The lubrication performance can be improved with adding micro textures on the bearing surface. The Reynolds equation, oil film thickness equation of micro texture journal bearing and the disturbance pressure equation of oil film in journal bearing rotor system is numerically solved by using the finite difference method and Reynolds boundary condition. The influence of composite microtexture on the lubrication performance of journal bearing is studied by changing the distribution, depth, arrangement, density, shape and other parameters of the composite microtexture. Meanwhile, a comparison was made between the composite texture performance and the lubrication performance of single texture bearings and smooth bearings. The results indicate that composite microtextures with appropriate parameters can significantly improve the lubrication performance of bearings.