| Spherical roller bearing is a kind of important transmission parts which can bear both radial load and bidirectional axial load.Because of its ability to withstand heavy load,it is broadly used in heavy machinery in steel,paper,shipping,electric power and other industries.In recent years,with the large-scale development of its application and the deepening of research,The appearance of bearing working surface has become more and more important to the research of the performance of the spherical roller bearing.In this paper,the23284CAF1 spherical roller bearing of Luoyang LYC Bearing Co.,Ltd.is studied based on the influence of different appearance of working faces on the performance of the spherical roller bearing.By establishing the micro contact model of the spherical roller bearing,the contact between roller and raceway with different roughness at micro scale was calculated and analyzed by finite element method,and the influence of working face roughness on contact stress and life was studied.By establishing the macroscopic watershed model of the spherical roller bearing,the influence of appearance of working face on the lubrication of the spherical roller bearing is studied.The reliability of the above calculation is verified by establishing the contact test of the micro-rough surface of the spherical roller bearing,which provides a reference for the study of the appearance of bearing working surface and the selection of its roughness.Firstly,the establishment of the contact model of the micro-rough surface is studied based on the three contact models established by the current working face topography,namely,the Hertz contact model,the fractal contact model and the statistical contact model.The micro-model functions of spherical roller bearing with different roughness are established by random Gaussian function method.Then,through reverse engineering,SCAN TO 3D in SOLIDWORKS software is used to establish 3D solid models from point to line,line to surface,and surface to body.At the same time,the rough surface is divided and fitted to the 3D model with rough surface,and the rough peak is removed so that the model can converge in the finite element calculation,which provides a basis for the next calculation of the microscopic rough contact model.Secondly,based on the established microscopic rough contact model,the contact between the roller model and the raceway model is adjusted adaptively and solved by calculation in ANSYS transient structure analysis.By simulating the roughness peak height of roller and raceway wall surface,the roughness condition with different topography of working face is characterized,the contact stress,strain and deformation parameters obtained by the two methods of loading and displacement loading under different roughness are calculated.By analyzing the calculation results of the microscopic contact model with different roughness,the contact area of the microscopic contact model with different roughness combinations is obtained,and the influence of different roughness on the relative life of the roller bearing is analyzed.Then,based on the fluid mechanics method and FLUENT software,the macroscopic watershed model of the spherical roller bearing is established.By setting the roughness degree of roller and raceway wall to replace the roughness condition of different working surface morphologies,the result parameters such as speed and pressure at different positions of the spherical roller bearings are calculated and obtained,and the rule of different roughness on the lubrication characteristics of the spherical roller bearing is found,and the effect of surface topography on the lubrication of the spherical roller bearing is analyzed.Finally,by establishing the contact test of the spherical roller bearing,the contact stress and other experimental data under different roughness are obtained,and the finite element calculation results are compared and verified,which provides a reference for the selection of the spherical roller bearing roughness. |
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