Structural Design Of 2BQM-6Type No-tillage Seeder Unit And Research Of Sowing Depth Control

The wind is strong, the drought, highly evaporation and wind erosion is serious in spring in northern China. It is necessary to set up conservation tillage technology. The no-tillage technology not only makes soil fertility and soil moisture conservation, improves wind erosion, but also achieves the purpose of increasing production and saving cost. Because of the environment of no-tillage work is terrible, such as hard soil, poor surface flatness and covering a lot of straw stubble, such a case cause the monomer of no-tillage seeder works on frequent ups and downs, so affect the stability of sowing depth. Ensure the stability of sowing depth, there need reasonable profiling mechanism and the best structural parameters.In this paper, research influence of profiling mechanism on the stability of sowing depth, seeking to the best structural parameters of profiling mechanism. By selecting key parts of the monomer and determining size, determine the monomer design scheme and structural parameters. By using parametric design function of Pro/E software to establish three-dimensional solid model and assembling the monomer of no-tillage seeder; and used ADAMS software to finish the simulation test of parallel four-bar no-tillage seeding monomer profiling mechanism what had been built, Comparatively analyzed Data curve of different structure of profiling mechanism, obtain the optimum rod length size parameters of profiling mechanism.By field experiment, determining the basis is the stability of sowing depth, verify the correctness of simulation results. By Contrasting rod length 420mm of before optimization and rod length 460mm of after optimization finish field experiment. The results showed that:both before and after optimized the rod length profiling cases, the average sowing depth only is 1.09mm, but after optimized the rod length 460mm profiling cases, the stability factor of average sowing depth is 90.15%, before optimized the rod length 420mm profiling cases, the stability factor of average sowing depth is 81.85%, after optimization the stability of sowing depth is greatly improved, the field experiment is consistent with the simulation test results...