Design And Simulation Study Of Corn Ridge Double-Row Strip Tillage Fertilizer Machine

Based on the analysis of the research of strip tillage machinery at home and abroad,this paper aims at the existing passive strip tillage mechanical anti-blocking device that cleans a large amount of straw that is prone to blockage,the active strip tillage mechanical power consumption is large,the crushed straw is mixed with the soil to cause seeding,and the existing fertilizer application device has problems such as poor fertilization quality and low fertilizer utilization rate.Combined with the double-row planting mode on large ridges of maize,the research on corn ridge double-row strip tillage fertilizer machine was carried out by theoretical analysis,mechanical design,simulation analysis and experimental research and verification,and the main research content are as follows:Structure and function of corn ridge double-row strip tillage fertilizer machine.In view of the agronomic needs of corn ridge double-row tillage,it was determined that the corn ridge double-row strip tillage fertilizer machine is composed of reverse rotation anti-blocking device and fertilization device,the former is composed of straw cleaning-stubble removal knife tooth assembly and ejection baffle,and the straw is thrown up and bounced back to both sides of the ridge and furrow by hitting the ejection baffle through the reverse rotation of the straw cleaning-stubble removal knife tooth,so as to realize the clean and tidy environment of the planting bed.The latter is composed of arc groove double helix fertilizer apparatus and soil guide layered fertilizer opener,arc groove double helix fertilizer apparatus through double fertilizer wheel dislocation to achieve uniform fertilizer discharge function,soil guide layered fertilizer opener through efficient soil return structure to achieve fertilizer layering and stable function.Design and operation quality analysis of key components of reverse anti-blocking device.The simulation of knife teeth and flexible straw was established by ADAMS and the accuracy of the simulation was verified by bench test,and then the EDEM simulation parameters(not the actual calibration value)were adjusted to obtain the same straw motion trajectory as the former,so the optimal simulation model for large-scale straw cleaning was selected,analyze the influence of relevant parameters on straw cleaning rate and straw ejection rate,take knife tooth speed,machine forward speed and knife tooth spacing as test factors,and use the secondary orthogonal rotation combination test to carry out the simulation and optimization test of reverse rotation anti-blocking device,and simulate and verify the test with the optimal parameters The results show that the field test results are basically consistent with the simulation results,which proves that the simulation model is accurate and the reverse rotation anti-blocking device has good operating performance.Optimization design and test of arc groove double helix fertilizer apparatus.Optimization design and test of arc groove double helix fertilizer apparatus.Through the theoretical analysis of its fertilizer discharge performance,the factors affecting its fertilizer discharge performance are determined as pitch,arc groove radius,center distance,and with fertilizer discharge uniformity and fertilization error as test indicators,the Box-Behnken test is carried out,and the fertilizer apparatus is made under the optimal parameter combination and the bench verification test and comparison test are carried out,and the test results show that the relative error of the bench test simulation test is small.The simulation and bench test are in good agreement,and the comparative test results show that the fertilization error of the optimized arc groove double helix fertilizer apparatus is low,the uniformity of fertilizer discharge is better than that of the single helix fertilizer apparatus,and the fertilizer discharge performance of the optimized arc groove double helix fertilizer apparatus is good.Design and simulation test study of soil guide layered fertilizer opener.In order to solve the problem of the stability of fertilizer stratification,the single-factor simulation and comparison test of the soil guide layered fertilizer opener is carried out by taking the change of the angle of the shovel plate and the soil return plate as the factors,and taking the resistance increase percentage,the soil return time and the depth difference of deep and shallow fertilizer as the test factors,the results show that compared with the traditional opener,the depth difference of deep and shallow fertilizer increases,the absolute tillage resistance increases,and the soil return time decreases.