Design Of Intelligent Paddy Field Integrated Machinery With Rotary Tillage And Leveling

The rice planting area in china is vast,and the main food crop with more than 65%of the population is rice.The development of rice planting has put forward h igher requirements for agricultural machinery.Currently paddy field work before pla nting rice in China is mainly done by the traditional rotary tiller and manual operat ion.When the tractor is tilted in the paddy field,the agricultural implement is also tilted in the same direction.This not only destroys the hard bottom layer of the s oil,but also seriously affects the flatness,which leads to use more irrigation water and decrease rice yield.With the reduction of the rural population in China and the increase of large-scale farms and rural cooperatives,and the improvement and upgr ading of agricultural machinery,it is urgent to develop a new paddy field rotary till er and leveler with a wide working range and automatic leveling.The main work of this thesis is summarized as follows:(1)The research findings of rotary tiller and land leveler at home and abroad were analyzed,and it was concluded that the paddy field integrated machinery with rotary tillage and leveling which can be automatically leveled is the future develop ment trend.(2)Completed the overall structural design of intelligent paddy field integrated machinery with rotary tillage and leveling.Based on GPS positioning technology an d hydraulic technology,three kind of machine structure schemes were designed,and each scheme was briefly explained.By comparing and analyzing the advantages an d disadvantages of each scheme,selected the best machine structure scheme for this project.Then explained the design details of key components,including the central suspension platform,folding mechanism,leveler and transmission system.(3)Completed the strength check for the folding mechanism and the central sus pension platform.Using the SOLIDWORKS software to establish the simplified 3D model of the folding mechanism,then the Motion simulation module of the softwar e was used to find the maximum force and direction of the force at the hinge poin t during the folding motion.Finally,the finite element static stress simulation modul e of the software was used to find the stress value and displacement at the hinge p oint.Similarly,static stress simulation analysis was performed on the hinge point of the central suspension platform using the Simulation module.It can be seen from t he analysis results that the folding mechanism and the central suspension platform d o not have a large stress concentration and deformation phenomenon,and the safety factor is high,meeting the mechanical design requirements as well.(4)Completed the design of the hydraulic system.The first generation of hydra ulic system was designed based on design requirements,and the parameters of the f irst generation hydraulic system components were calculated,then selected those co mponents.In order to solve the problem during the commissioning experiment,the s econd generation hydraulic system was designed,and the components were selected too.Finally,using AMESim hydraulic system simulation software to analyze the dy namic characteristics of the two generations of hydraulic systems.(5)Completed the commissioning experiments of two generation hydraulic syste ms and the field test of intelligent paddy field integrated machinery.The commissio ning experiment results of the two generation hydraulic systems show that the worki ng performance of the second-generation hydraulic system can meet the needs of th e automatic adjustment function of the integrated machinery.The integrated machine ry performed well in the field experiment,and the operation effect basically satisfie d the agronomic requirements of rice planting.