Lightweight Design And Research Of Cutting Header Of Rice Harvester

As a large agricultural country,China’s intensive agricultural mechanization has become a trend of modern agricultural development.With the increased of this trend,people have put forward new requirements for agricultural machinery.According to the data,in Youxi county,under the jurisdiction of Fujian province,nearly 100,000 mu of rice is planted every year,and the average yield per mu in the first quarter is 600 kg,which is higher than that of ordinary rice.When the rice harvester tries to reduce the falling grain and ear loss caused by harvesting,it is of great significance to increase the rice production.Therefore,farmers in this area urgently need a rice harvester with a lighter weight and fuel economy to harvest renewable rice.In order to meet the requirements of lightweight design,lightweight design and economic analysis of the header of the rice harvester are required.Three-dimensional modeling and assembly of the header with computer software was performed to perform finite element analysis on the header of the rice harvester.Through the structural optimization and material replacement of the header of the rice harvester,its fuel economy is also better than before.Due to the complicated structure of the cutting Header,the geometry model of the cutting Header needs to be established in Creo/Pro ENGINEER software.Afterwards,the geometrical model was imported into ANSYS/ANSYS workbench software,select the unit,define the material,divide the grid,define the boundary condition to get the finite element model,and perform static and dynamic analysis in ANSYS workbench.The topology optimization of grid division was carried out by Hyper Mesh software.The finite element model of the cutting Header is constrained modal analysis,and the natural frequency and main vibration frequency are obtained before and after the light quantification results.On the basis of constrained modal analysis,the harmonic response is analyzed based on the inertial load obtained from the simulation.The CATIA software was used to perform the movement simulation analysis of the cutter and the transmission mechanism of the header to complete the displacement-time image in one cycle.Finally,the lighter design program evaluation system and market price list of replacement materials were investigated to calculate the fuel economy after lightweight design.Using digital virtual prototype technology,the digital prototype of the header was trial-produced.The above analysis results show that after the lightweight design of the header system,its maximum stress value is far less than the fatigue limit of the material,and it can achieve the required strength requirements for work.In addition,compared with the previous headers,the header designed with light weight has better fuel economy,and when the harvesting operation is performed,the roller compaction rate and the header loss of rice are reduced.The fuel economy of the rice harvester has been improved,and the per mu advantages of ratoon rice have been increased,demonstrating the feasibility of this lightweight design scheme.