Dynamic Analysis Model Of Double-row Tapered Roller Bearing

As a supporting rotating component,the bearing plays a vital role in various mechanical systems and equipment.The tapered roller bearing has been widely used in the support system due to its good bearing capacity and dynamic performance.With the continuous development of the industry,the harsh working environment puts higher requirements on the dynamic performance of the bearing,and the dynamic performance of the bearing directly affects the performance of the whole machine.With the extensive development of CAE simulation technology,it is possible to analyze the mechanical system by computer.The bearing performance analysis based on dynamic software has become a new research trend in the world bearing industry.In this paper,a double-row tapered roller bearing of a certain type is taken as the research object.Based on the theory of rolling bearing mechanics,the mechanical properties of the bearing are studied and analyzed by Adams mechanical dynamics simulation software.The main research contents are as follows:(1)A parametric geometric model of a universal double row tapered roller bearing was established based on Adams software.The design variables are associated with the bearing structure parameters to realize the model parameterization;The macro file for generating the roller and cage model is written by using the CMD command language,and the established bearing model can be automatically updated with the parameter changing;The graphical user interface of bearings is developed to realize the efficient modeling and analysis of double row tapered roller bearings.(2)A rigid-flexible coupling model of double row tapered roller bearings was established.The mechanical system model created in Adams is a rigid body system by default,and the actual object will undergo a certain degree of deformation under the force state.This paper considers the outer ring of the bearing as a flexible body part,and introduces the introduction of the flexible body part.The method provides a feasible solution for the rigid-flexible coupling analysis of the bearing.(3)The effect of the oil film thickness between the roller and the inner and outer ring races on the bearing contact stiffness is studied.The load distribution analysis of the bearing under radial force is carried out.Based on Hertz contact theory and elastohydrodynamic lubrication theory,the radial contact stiffness of the bearing is theoretically calculated and applied in the simulation analysis of bearing dynamic performance to make the model calculation result more In line with the real situation.(4)The dynamic performance simulation analysis of a double-row tapered roller bearing is carried out.The calculation of the movement of the cage,the speed deviation ratio and the roller slip rate under different working conditions are analyzed,radial load,axial load and cage pocket clearance have an effect on the stability of the bearing cage and the roller slip performance.(5)In order to verify the rationality of the dynamic analysis model of tapered roller bearings in this paper,the simulation speed and theoretical speed of the cage are compared and analyzed.The error between the simulation value and the theoretical value is within 3.2%.The bearing results are calculated by using Adams simulation results.The frictional power was simulated by finite element thermal analysis to simulate the temperature rise of the bearing.The error between the simulated value and the experimental value was within the allowable range,thus verifying the rationality and accuracy of the model.