Design And Simulation Study Of Millet Harvesting Entanglement Reduction Heade

Millet is one of China’s endemic crops,and its output accounts for more than 8 layers of the world’s total output.Among the known grasses,millet has the highest nutritional value among food crops,and compared with existing food crops,millet has more balanced nutrition and relatively more functional components.The product of the shelling of the millet becomes the millet that we know every day.Because of its high nutritional value,it is widely liked by the people.Today,the main production areas of agricultural and grain planting are mainly in the north of China,in which the production mode of millet still stays in the traditional production mode,due to the low degree of mechanization of millet industry,its development has been seriously restricted.In order to meet the requirements of modern agricultural development,the traditional millet management method must be abandoned,and the degree of mechanization urgently needs to be improved.Nowadays,many scholars at home and abroad have successively studied the combine harvester of millet,but there is still the problem of header loss,in order to better solve the problem of header loss,this paper improves and improves the winding reduction header based on the existing header to achieve the problem of header loss caused by winding.The main research content and conclusions of this paper are as follows:(1)The physical characteristics of millet were analyzed.By measuring and weighing,it was found that the center of gravity of millet was located at 1/3 of the height of the natural plant,so as to better analyze the distribution of force during harvest.(2)With the natural plant height and center of gravity of millet as reference,the parameters of the grain harvesting and cutting platform were calculated and analyzed according to the previous experience,including the straight warp of the anti-winding stranding wheel shaft with a diameter of 320 mm.(3)The existing grain division mechanism was optimized to solve the problem that it is difficult to separate the ear lodging caused by millet maturation.The final scheme is that the maximum distance from the ground of the harvester should be greater than 1500 mm,and then the gap between the harvester and the harvester should be reduced to show the phenomenon of grain stacking.(4)UG NX 12.0 was used to conduct three-dimensional modeling and simulation of the anti-winding strangler,so as to confirm that there was no interference phenomenon during the work.(5)Using ANSYS Workbench18.0 software to carry out static analysis and modal analysis on the frame of the anti-winding cutter and the harvester respectively,the maximum stress of the anti-winding cutter was 23.687 MPa.The maximum deformation displacement is 0.053129 mm,the maximum stress of the cutting frame is 25.131 MPa,and the maximum deformation displacement is 0.067818 mm.The results are all less than the allowable stress,which also shows that the stiffness and strength requirements can be met in production.And the modal analysis shows that the frequency of resonance is low in the operation process.Meet the production demand.Finally,the feasibility and accuracy of the simulation test are proved through experimental verification.