Simulation Analysis And Experiment Of The Fertilizing Mechanism For Lateral Planting Of Sugarcane Based On Discrete Element Method

The lateral planting of sugarcane at present mainly adopts the approach of artificial fertilization,which exists the problems of poor uniformity of fertilizer application,unnecessary waste of fertilizer,insufficient fertility,and burning of sugarcane seeds,etc.In order to solve these problems,based on the development of the lateral planter of sugarcane and the agronomic requirements of lateral planting of sugarcane,a fertilizing mechanism of lateral planting of sugarcane which is mainly composed of a small opening spiral fertilizer distributor and a cam mechanism is designed.Then the influencing factors and optimal parameters of the fertilizing mechanism of lateral planting of sugarcane are determined by using the discrete element method so as to improve the uniformity of fertilization,reduce the waste of fertilizer,ensure the fertility of sugarcane,and ensure the consistency of the cycle between sugarcane and fertilizer and the distance between sugarcane and fertilizer to avoid the phenomenon of burning sugarcane seedlings,and further increase the sugarcane production.The main research contents and test results of this article are as follows:(1)According to the agronomic requirements of lateral planting of sugarcane,a fertilizing mechanism for lateral planting of sugarcane that is mainly composed of a small opening spiral fertilizer distributor and a cam mechanism is designed on the basis of the development of the lateral planter of sugarcane.And its parameters are calculated and determined respectively.(2)In order to provide parameters for discrete element simulation tests,some physical property parameters(including density and three-dimensional size)and mechanical property parameters(including collision recovery coefficient,static friction factor and dynamic friction factor)of the compound fertilizer are measured.(3)The EDEM software based on the discrete element method is used to conduct a single-factor simulation test on the small-opening spiral fertilizer distributor and cam mechanism,and the effects of various factors on the lateral width of the fertilization 、 the coefficient of variation、 the amount of fertilization、the fertilization interval and the total longitudinal length of the cycle are analyzed.Then the quadratic regression orthogonal rotation combination simulation test is carried out,and the analysis of variance is used to further analyze the significance and interaction of each factor.At the same time,the response surface is used to analyze the influence of each factor combination on the index.Finally,the optimal parameter combination based on regression equation simulation is solved:the slot opening is 8.6mm,the pitch of the spiral blade is 60 mm,the speed of the spiral shaft is 63 r / min,the rotating speed of the camshaft is 137 r/min,the near repose angle of the cam is38°,and the walking speed of locomotive is 0.8 m/s.(4)A single-factor bench test and quadratic regression orthogonal rotation combined bench test are carried out on the fertilizer distributor by setting up a test platform,and it is shown that the discrete element method is feasible to study the fertilizer distributor by comparing the test results with the simulation test results.At the same time,a bench verification test for simulation optimal parameters of fertilizer distributor and cam mechanism is carried out,and the test results are as follows: the lateral width of the fertilization is 212.8 mm,the coefficient of variation is 18.37%,the amount of fertilization is 3.543 kg/ min,the fertilization interval is 114.8 mm,and the total longitudinal length of the cycle is344.3 mm.And it has shown that the indexes meet the agronomic requirements of lateral planting of sugarcane and it is feasible to use discrete element method to study the optimal parameters of the fertilizing mechanism for lateral planting of sugarcane.Then a bench verification test for the bench optimal parameter of the fertilizer distributor is carried out,and the test results show that it is also feasible to use the bench test method to study the optimal parameters of the fertilizer distributor.Finally,a field tests are conducted on the simulation optimal parameters of the fertilizing mechanism for lateral planting of sugarcane by manufacturing prototype,and the test results basically meet the agronomic requirements of lateral planting of sugarcane.The research results can provide references for the development and subsequent improvement of the fertilizing mechanism for lateral planting of sugarcane.