Dynamic Analysis Of Coupling Wear And Impact In Gear Transmission System

Gear transmission is one of the most widely used mechanical transmission devices,this transmission has many advantages,but the gear vibration and impact during operation will have a serious impact on the accuracy and efficiency of gear transmission,and in the long run In the process,the tooth surface will produce wear and tear.Gear vibration and impact have a direct impact on the wear and tear development.Conversely,with the development of tooth flank wear,the vibration and shock conditions of gears will also change.Studying the coupling relationship between the wear and the impact of the gear transmission system is very important for calculating the dynamic transmission error and dynamic engagement force of the gear transmission system.In this paper,the single-stage gear is taken as the research object to study the coupling relationship between gear wear development and vibration impact,and to compare the different tooth surface contact force model and the different degrees of freedom gear system model dynamic response and wear development difference between.The main research contents are as follows:Firstly,the discrete position function of each point on the involute gear was established.Considering the time-varying meshing stiffness of the gear,the meshing force of the tooth surface was obtained through the inter-tooth load distribution and the Winkler surface contact model.Sliding displacement and wear coefficient into the Archard wear model,established a gear transmission system quasi-static wear calculation model.Secondly,the single-degree-of-freedom vibration model of a single-stage gear system is established.The dynamic meshing force is calculated based on the dynamic transmission error and input to the wear calculation model.The wear amount is then coupled to the backlash function of the dynamic equation.The iteration of the cycle,get the dynamic response with the wear cycle and the development of wear under different speed.Then,the contact-collision model of the object was established by using the nonlinear damping theory.The energy loss during the collision was calculated by using the gear system.The influence of the dynamic response and the wear development of the gear system under the collision model was analyzed.The results of the model are compared.Finally,the three-degree-of-freedom single-stage gear model is established,the stiffness and damping of the bearing are added,and the law of system dynamics response and wear development is obtained.The response and wear of single degree of freedom are compared.Comparing the development law under different models and the relationship between the quasi-static wear calculation model,the quasi-static wear calculation software was compiled by using the GUI of matlab to provide the researchers with the wear data reference.