EVALUATION OF THE WEAR RESISTANCE OF A RADIAL BEARING HAVING A POLYMER COATING ON THE SURFACE OF THE SHAFT WITH AXIAL GROOVE

The results of this study make it possible to improve understanding of viscous lubricant movement in radial sliding bearings with a polymer coating and a groove on the shaft surface. The studies show that the available grooves on the shaft surface affect the pressure distribution and lubricant viscosity, which, in its turn, influence the tribotechnical parameters of the bearing. The introduction of grooves can help improve the lubrication characteristics of the bearing with a higher effective distribution of lubricant over the machining gap. Study method: to describe the movement of a lubricant, a model was used that includes the continuity equation and studies the change in viscosity from pressure. The calculations and experiments carried out confirm the adequacy of the proposed model, which indicates the possibility of its practical application for engineering analysis and design. The data obtained show that the available grooves have a successful effect-this increases the load-carrying capacity of the bearing and decreases the friction factor and removes wear on the contact surfaces. The novelty of the work: This technique includes an integrated approach to modeling the interaction of surfaces, taking into account both the geometric features of the groove and the properties of the polymer coatings used. An important aspect of the work novelty is not only the development of a mathematical model, but also its validation based on expert data. Conclusion: The analysis of wear resistance confirms that the combination of a fluoroplastic coating and a groove on the shaft surface allows for a more uniform load distribution. This prevents local overloads and excessive heating, leading to early bearing failure. Having grooves with 4 mm width on the shaft surface can also lead to better lubricant circulation.