Study On Tribological Mechanism Of Bionic Texture On Inner Surface Of Water Lubricated Bearing

With the development of biomimetic mechanics,it has become possible to combine the superior surface structure of certain organisms with their good physical properties to obtain a mechanical surface structure with properties similar or better than those of such organisms.Studies have shown that the surface of various plants in nature has good hydrophilicity or hydrophobicity,and can have a good adsorption or evacuation effect on water.The reason for these properties is largely attributed to the micro-topography of the fabric surface.Therefore,this topic proposes the concept of water-lubricated bearing inner surface bionic texture to improve its wettability,and then to improve its lubrication effect,reduce the friction coefficient,improve the bearing capacity,carry out water-based bearing friction based on bionic texture friction Study modification methods,theory and technology research.The research work and main contents of this article include:(1)Taking some plant leaves as the research object,the contact angle was used to characterize the wettability of the leaves,and the surface topography was characterized by the fractal dimension.The surface morphology was observed and analyzed using SEM.The surface reconstruction and fractal dimension calculation software developed by the company was used to qualitatively and quantitatively analyze the surface.Combined with the SEM topography of plant samples,the effect of surface morphology on wettability was analyzed,and the relationship between surface structure,wettability,and fractal dimension was analyzed.The study found that the selected plant surface has obvious self-similar characteristics,and can be characterized by fractal dimension.The fractal dimension of the surface is positively correlated with the contact angle.That is,the smaller the fractal dimension is,the smaller the contact angle is and the better the wettability is.(2)Considering the two-way heterogeneity,the WM function is used to simulate the surface structure of a water-lubricated bearing with fractal characteristics.The simulated rough surface is applied to the classical Reynolds equation to study the influence of the surface topography on bearing bearing capacity and friction performance.The relationship between the surface fractal dimension and the tribological performance of a water-lubricated bearing in an elastohydrodynamic state.(3)Water-lubricated bearings are generally used for the use of Sailong materials.According to the observed surface structure of the plants,surface biomimetic texture processing is performed using a laser marking machine,and the surface contact angles and fractal dimensions of the samples after processing are measured and analyzed.The results show that the bionic texture can change the wettability of the bearing surface.The relationship between the wettability of the surface after the texture and its fractal dimension is consistent with the foregoing findings on the surface structure of the plant.At the same time,the texture size and spacing have a significant effect on the surface wettability and fractal dimensions,and the influence on depth is weak.(4)Tribological performance tests of different surface textures were performed using a Plint TE-92 microcomputer-controlled rotary friction tester.The analysis found that the texture can improve the surface tribological properties,and the pore size,spacing,depth and other textures have a significant impact on the tribological properties of the water-lubricated friction pair.