Study On The Non-uniform Load Characteristics Of Two Teeth Difference Swing Rod Movable Teeth Transmission System

Less tooth differenced planetary transmission evolved from two tooth difference swinging rod movable teeth transmission,due to many tooth meshing feature,make it have stronger bearing capacity,and shock wave structure symmetry,ensure the tooth in the process of the symmetric more meshing force equilibrium,deputy since the balance is strong,dynamic performance is stable,the complex working conditions in the mines,ships,vehicles,and many other fields have broad application prospects.However,under actual working conditions,due to the influence of internal and external excitation factors,the load inhomogeneity of the symmetrical meshing pair in the transmission system is obvious,which will increase the vibration of the system,fatigue damage of the tooth surface,damage the movable teeth,and seriously affect the transmission performance of the system.Therefore,it is necessary to study the influencing factors of the non-uniform load on the movable teeth of the differential swing rod so as to improve the loading state of the transmission system.With two tooth difference swinging rod movable tooth as the research object,based on the theory of the concentrated parameter,establish coupling dynamics are formulated with clearance of the equivalent model,using the method of the action line increment analysis equivalent meshing errors caused by meshing line,using the deformation coordination,calculation of the meshing pair of meshing stiffness,by analyzing the relationship between relative displacement components,the system dynamics differential equation is derived,Newmark method is used to solve the vibration response of the system.The dynamic load calculation formula is derived and the load proportion coefficient is used to evaluate the load inhomogeneity of the system.The influences of the related errors between the shock device and the center wheel,the toothed clearance,the load torque and the input speed on the load ratio coefficient of the system were compared and analyzed to find out the most critical factors affecting the load inhomogeneity of the system.Based on Adams dynamics simulation software,virtual prototype models of shock generator and center wheel with different errors were established,and different load torques and input speeds were set to conduct simulation analysis of moving loads.By comparing the load history and the changing trend of load ratio coefficient,the influence of different excitations on the load inhomogeneity of the system is analyzed..By designing and building the dynamic load measurement test platform,the strain acquisition test system was used to test the strain history of the meshing pair of central symmetrical movable teeth under different load torque and input speed.After analyzing the data,the variation trend of load ratio coefficient under different working conditions was obtained.Compared with the results of theoretical calculation and simulation analysis,the influence of load torque and input speed on the load inhomogeneity of the system was verified.Through the research on the load inhomogeneity of the system,the key excitation factors affecting the load inhomogeneity of the system in the related errors of the shock device and the center wheel,as well as the influence trend of the load torque and input speed on the load distribution of the system are obtained,which provide theoretical reference for improving the load uniformity of the system.