Research On Dynamic Contact And Simulation Of Helical Gear

The research of dynamic contact characteristics and dynamic response of gear transmission system has been paid much attention by scholars.For the most part in the study of gear from the level of the whole gear,namely the gear as a whole,this research method is easier to gear model is set up,but this kind of gear based on the overall model is difficult to real cases of all kinds of error,and a single gear tooth profile error caused by the homogenization effect into consideration.Based on the precise profile of a single helical gear tooth and the theory of gear tooth contact,the gear tooth contact module is established in this paper,and the gear tooth contact module is integrated into the gear contact model according to the actual meshing of the gear,so as to study the dynamic meshing problem of helical gear.Through the mathematical modeling of the helical gear tooth surface and the use of distance detection theory to determine whether the tooth surface contact,and through the coordinate of the contact point to calculate the gear tooth mesh stiffness and tooth surface friction coefficient and other contact parameters,and then calculate the meshing force and force moment.According to the actual meshing situation of helical gear,the multitooth judgment module is established to complete the integration from gear tooth model to gear model,the dynamic contact model of helical gear is established,and c language program is written to complete the secondary development of gear tooth contact in ADAMS.Using the helical gear dynamic contact model,the meshing process of a pair of helical gears is simulated under a given working condition,and the original data such as speed,acceleration,normal force and friction force of gear transmission are obtained.By processing the original simulation data,the simulation results are obtained,such as tooth embedding depth,tooth friction characteristics,time-varying meshing stiffness and tooth stress.By analyzing and verifying the simulation results,the accuracy of the helical gear contact algorithm is preliminarily verified.Helical gear three-dimensional model is established,using the finite element method under the given conditions of the helical gear meshing simulation,get the tooth shape,tooth surface contact stress and tooth root bending stress,such as data,and the use of helical gears dynamic contact model to calculate the data contrast,found that two methods of simulation with tooth shape,tooth surface contact stress and tooth root bending stress size close,the same change trend,further verify the accuracy of the model.