Study And Optimization Of The Influence Of Surface Texture On The Lubrication Performance Of Intermediate Bearing With Large Specific Pressure

As an important bearing component of rotating equipment,radial sliding bearing has the characteristics of high load,impact resistance,low noise and long life,and is widely used for the support of ship propulsion shafting.Therefore,research on the lubrication performance of sliding bearings is of great significance for ensuring the stability of the ship,improving the efficiency of the shafting transmission and realizing the "green ship".In this paper,a radial sliding intermediate bearing for a certain type of ship is taken as the research object.Based on tribology theory,a numerical model of fluid lubrication of sliding bearing is established.By introducing a cavitation model,the effect of oil film rupture in the divergent zone is considered.The fluid lubrication characteristics of the intermediate bearing under different working conditions were analyzed.A numerical model of surface micro-texture sliding bearing lubrication was established by introducing surface micro-texture.The effects of texture shape,depth,feature length,distribution position and distribution density on the lubrication performance of the intermediate bearing were analyzed.The results show that the micro-texture with appropriate aspect ratio in the oil film inlet area has a good effect on bearing bearing capacity;the texture distribution density has a great influence on the improvement of bearing performance.The triangular texture has the best effect on the lubrication performance of the bearing.In this paper,the texture design parameters are further optimized.The genetic algorithm optimization model was established and the interaction law between texture parameters was analyzed.A set of optimal surface texture parameters were obtained in the given feature parameter value space,and the lubrication performance parameters such as bearing capacity and friction coefficient of the intermediate surface micro-texture were analyzed.In this paper,by introducing the surface micro-texture,the influence of micro-texture parameters on the lubrication performance of the intermediate bearing is compared and analyzed,and the surface micro-textile parameters are further optimized.The application of the surface micro-texture technology to the intermediate bearing is further improved.The intermediate bearing transmission efficiency provides a good theoretical guidance.