Design of the Corn Field Straw Chopper Transmission System Based on Virtual Prototype Technology

The planting area of corn is large and the straw yield is high in our country. But the number of the straw returned to field is low at present, and the cost of returning straw to field is high. Thus, a set of corn straw returning machine whose productivity is high, cost is low and can be used together with self-propelled corn harvest machine is designed. This paper introduced the corn straw returning machine's general parameters and drive system's working process and design process. Then the virtual prototype model of the drive system is built, and virtual prototype technology is used to build the model of the drive system and to conduct kinematics simulation and dynamics simulation. The results show that the angular velocity and the stress of all sample points are all different in different working conditions. The response of the sample point is obvious when the pound load is big, and the response decayed to zero after three cycles of concussion. The relationships between angular velocity and stress of each sample point prove that the virtual prototype model's validity. This study provides a new method and a way for the design and optimization of corn straw returning machine.