Analysis Of Dynamic Characteristics And Structural Optimization Of Solid Lubrication Bearings

The solid lubrication angular contact bearings are an important component of the rotating mechanism in the satellite turntable subsystem,and their operating status will directly affect their performance and service life.Thereby,it has an indirect effect on the performance and service life of the entire device.Due to the unreasonable design parameters of angular contact bearings in a satellite turntable,the surface wear of the cage and the abnormal current of the equipment are caused,and the optimization of the cage parameters lacks theoretical guidance.Therefore,study the influence of various parameters on the dynamic performance of ball bearings,analyze and test the stability of the cage,and provide guidance for optimizing bearing parameters,act as a guide for practice.In this paper,the angle contact ball bearing used in the satellite turntable subsystem is studied,and the main studies are as follows:(1)Starting from the basic theory,the calculation formula of the kinematics relationship of each part of the bearing is derived.A quasi-static model for ball bearing analysis suitable for various load cases is established,and the inertial force is divided into centrifugal force and gyroscopic moment,which is easy to converge when solving the inner ring deflection angle,which is more applicable than the Jones-Harris model.The above model was solved using the Newton-Raphson iterative algorithm and analyze the contact angle and loading of the research object under different groove curvature,load and speed,so as to lay the foundation for the dynamic response analysis of the bearing.(2)Combine with the subject background to impose dynamics simulation boundary conditions,establish the FEM dynamic analysis model of Angular contact bearings based on ANSYS/LS-DYNA.The bearing cage speed,inner ring speed,and contact force between ball and outer ring will be compared with the simulation by theoretical formula,and the error is less than 3%,which verifies the accuracy of the dynamic model.(3)Analysis of bearing dynamic characteristics based on simulation results of various parameter of rolling bearings.Including: the structural parameters of the cage,the curvature coefficient of the channel,the impact on the cage slip rate and center of mass vortex deviation;The influence of operating conditions on bearing speed,acceleration,and cage slip rate.Finally,based on stability,the design optimization scheme of the cage is proposed to provide guidance and theoretical basis for the optimization of bearings.(4)The non-contact measurement and analysis of the center of mass trajectory of the cage is achieved using experimental equipment built with high-speed cameras.By capturing a video of the marked points on the end face of the cage during bearing operation,analyze the motion trajectory of the cage center of mass and the fluctuation of speed over time to determine bearing stability.According to the many times test results,the bearing cage parameters with improved stability are proposed,and the method simulated in this paper is verified to be an effective bearing parameter optimization method.