The Dynamics Simulation Analysis Of Cross Shaft Universal Coupling

The cross shaft universal coupling is used to join two axis whose directional relation is parallel or intersection in order to transfer movement and torque. It has the important status in the mechanical transmission system which is mainly used in rolling mill and cars domain. In practice, the cross shaft is the most easy to wear and failure which the main reason is the manufacturing error, assembly error and the normal wear and tear in the work process. It will lead to the increasing of kinematic pair gap between connecting component. And this changes could make a serious collision between kinematic pair which will cause dynamic stress increases in the coupling mechanical system. Then aggravate wear and the increasing of the elastic deformation will appear which will cause the system vibration, and make the system’s overall transmission efficiency drops and increase the probability of failure. With the reducing of the service life of the cross shaft universal coupling, it will bring unnecessary economic losses. Therefore, the results from the analysis of dynamic performance of the cross shaft in order to provide the theoretical basis on the design and manufacture of cross shaft universal coupling system.The research object of this paper is a certain type cross shaft universal coupling. According the finite element analysis software ANSYS Workbench to obtain the stress simulation result which can be intuitive to find the key parts of the cross shaft universal coupling system is the of cross shaft risking parts. Combined with the dynamics simulation software ADAMS, this paper analyzed the wear life of cross shaft.First of all, the structure and working principle of cross shaft universal coupling is introduced, the finite element model of the cross axle type universal shaft parts are established.Through the finite element static analysis and modal analysis of cross shaft universal coupling, the statics analysis results of component and the modal results of system are obtained.Then, this paper studied the effect of clearance and flexible components to dynamic performance of the cross axle type universal coupling system. Using ANSYS and ADAMS to make the joint simulation analysis. According to the theory of Hertz, this section selected the nonlinear equivalent spring damping model and considering the influence of coulomb friction, making the contact force parameters which is closed to the actual situation in the ADAMS, setting up different gap the rigid-flexible coupled system whose cross shaft and intermediate shaft is flexible component. In the ADAMS software, the angular velocity and angular acceleration and the change of contact force of cross shaft universal coupling system was analyzed. Compared the analysis results of dynamic simulation practice, we found that the simulation results can better reflect the clearance and flexible body how to affect the dynamics performance of universal coupling system.Finally, this paper introduced the classification and mechanism of wear and tear and determined the friction type of cross shaft. Then we give the analysis methods of wear life and the wear rate of materials. Based on the analysis results of ADAMS and ANSYS Workbench and combined calculation method of wear to estimate the wear life of cross shaft.This article uses the ANSYS and ADAMS joint simulation analysis, makes finite element static analysis to the cross shaft universal coupling model and find out the key parts of dangerous position. At the same time, considering the effect of gap and the flexible components to the dynamics performance of system. Combining with the coupling of tribology and dynamic behavior,this section made wear analysis. The simulation results can provide theoretical basis on the design of the cross axle type universal coupling, which improving stability and reliability of the institutions, meanwhile embodying the superiority of virtual simulation technology.