Estimated friction and load capacity coefficients for a modified radial bearing design under a turbulent condition friction

The effect of a true viscous lubricant in a radial sliding bearing coated by polymer having a specialized groove on the shaft surface is studied. The developed computational model based on the equations of fluid motion and the equation of continuity allows for a deeper understanding of the dynamics of the lubricating layer and its interaction with the working surfaces. Special attention is paid to the geometric features of the groove, which affect the pressure distribution inside the bearing. The integrated use of a polymer coating and a groove ensures uniform load distribution, which increases the load capacity of the system. Numerical calculations show that the use of a polymer coating reduces friction coefficient and contributes to the efficient operation of the lubricant in turbulent conditions. Experimental validation of the model was carried out under various load conditions and rotational speeds, which made it possible to compare theoretical calculations with experimental results in a high-quality way. The analysis showed a high degree of agreement between calculations and experiment, confirming the reliability of the proposed model. The results obtained prove the necessity of design solutions, such as a combination of polymer coatings and grooves for improved bearing performance.