Because of the accurate and stable requirements of the filling machine synchronous belt, its dynamic characteristic analysis is particularly important. Based on the systematic summary of the development of synchronous belt at home and abroad, this paper gives the characteristics of the structure and performance of synchronous belt conveyor.

Based on the self-developed synchronous belt system of a new liquid filling machine, the model and dynamic characteristics of the synchronous belt were studied based on the dynamic principle of flexible multi-body system by using RecurDyn software platform, and the problem of avoiding resonance during the transmission of the synchronous belt was studied, and the optimization scheme was proposed.

The research work is as follows:

Firstly, according to the structure and characteristics of the synchronous belt, the driving force of the synchronous belt, the meshing polygon effect, and the related exciting frequency are analyzed. The transverse vibration of the belt is studied by using the string and beam models, and the longitudinal vibration of the synchronous belt system is studied by using the torsional vibration model.

Secondly, based on the flexible multi-body dynamics theory, the finite segment method is used to discretization the flexible body with infinite degrees of freedom, and the general form of the dynamic equation of the free flexible body is given by combining the virtual displacement principle and D ‘Alembert principle. It lays a theoretical foundation for the study of synchronous belt system dynamics model and dynamic simulation.

Then, the theoretical basis of flexible multi-body dynamics equation is established based on the finite segment method, the flexible synchronous belt is discrete into rigid band elements and flexible connections, and the mechanical model of synchronous drive is established by using the relative coordinate method. A new generation of flexible multi-body dynamics software RecurDyn based on relative coordinate system and recursive algorithm was used to establish the entity dynamic simulation model of the filling machine synchronous belt, and the operation process of the synchronous belt system was simulated and analyzed. The simulation results described the operation process of the synchronous belt system intuitively, and the concerned system dynamic parameters and various dynamic parameter curves were obtained.

Finally, according to the structure and dynamic characteristics of the synchronous belt, the design method of avoiding resonance and reducing vibration by increasing the appropriate initial tension and indirectly reducing the band distance is given. This method is used to optimize the design of the actual filling machine synchronous belt. The simulation results show that the optimization scheme can effectively avoid resonance, reduce the vibration of the synchronous belt, and effectively control the running stability of the synchronous belt of the filling machine.

Through the above research, the paper gives the general dynamic model and optimization scheme of synchronous belt system, and gives the general method and steps of virtual prototype technology to study the visualization technology of synchronous belt system. It provides a good solution for the design and research of filling machine synchronous belt.