Dynamic Analysis And Improvement Research Of Key Components Of Rice Transplanter

Rice planting is the fine tradition of intensive and careful cultivation agriculture in China, the traditional "bending stooped manual transplanting" with characteristics of the poor working conditions, labor intensive, and low operating efficiency, machinery planting was used to instead of manual planting to achieve rice planting mechanization was the important part of rice production to achieve mechanization.The key components of rice transplanter including transplanting mechanism and seeding feeder mechanism, and the performance of these key components directly determine the level of the overall performance of rice transplanter. But there were little research about key components of transplanter was involved in reducing wear and reducing impact studies at home and abroad now. The main object study of this paper were seedling-pushing device in transplanting mechanism and seeding feeder mechanism, and through the dynamics analysis and improvement studies to achieve the purpose of lessened abrasion and reduced impact of mechanism, and point out the idea that the cam and fork of seedling-pushing device and the double helix axis of seeding feeder mechanism were producted by nylon material in the first time, which reducing the cost of production and their quality of key parts significantly. In this paper, the content and results are as follows:1) The research based on full understand the studies at home and abroad, and proposed the study objective of reducing wear and reducing impact of the key components of rice transplanter.2) At the first, the working principle and structure design of key components of transplanter parts about seedling-pushing device in transplanting mechanism and seeding feeder mechanism was detailed.3) The kinematics and dynamic model of seedling-pushing device and seeding feeder mechanism was established.4) According to the mathematical model to decide optimization parameters and optimization objectives of seedling-pushing device and seeding feeder mechanism, and the institutional analysis and optimization software was developed based on VB6.0. By optimizing the optimal parameters and curves, to achieve the research requirement of lessened abrasion and reduce impact of mechanism.5) Based on the results of the optimal, the three-dimensional model of seedling-pushing device and seeding feeder mechanis were established by using of three-dimensional modeling software UG , and built the virtual prototype test of seedling-pushing device in transplanting mechanism and seeding feeder mechanis by simulation software ADAMS, then verify the correctness of mathematical modeling, and observed the research results lessened abrasion and reduce impact of mechanism.6) The modal analysis of the double helix axis of high-speed rice transplanter seeding feeder mechanis had been carried with by finite element analysis software, and the modal materials including No.45 steel and nylon; The seedling-pushing device in transplanting mechanism was executived flexibility Analysis of dynamics simulation and strength analysis, and verify the work performance of nylon fork.7) For the previous theoretical study, experiments was used to verify the correctness of theoretical research. Nylon materials was used to replace of traditional steel nylon material to produce the double helix axis of seeding feeder mechanis and the cam, fork of seedling-pushing device, and abrasion test was used to verify the adaptive of nylon material, eventually found resistant nylon 66 meet the work requirements. In the vibration test, when the material of cam and fork is nylon, the vertical vibration force is confirmed much smaller. The torque of cam in seedling-pushing device was reduced by half after the improvement of cam trace in torque test. The results of tests showed that researchs of lessened abrasion and reduce impact of mechanism was succceed.