The Design And Experimental Research Of The Automatic Seedling Supply Test Device Of The Paper Bowl Of The Corn Transplanter

Maize is the main crop in Heilongjiang province.Heilongjiang Province spans four accumulative temperate zones.Varieties and yields of maize planted in different regions are greatly affected by accumulative temperatures.Transplanting can prolong the growth period of maize and improve the quality of maize.Using transplanting method can solve the problems of short frostfree period,large temperature difference and low maturity of Maize in some areas of Heilongjiang Province,so as to achieve stable and high yield of maize planting.At present,semi automatic transplanter is used for maize transplanting,and artificial seedlings and seedlings are needed.When artificial feeding seedlings,the operator should be highly concentrated,otherwise seedlings leak easily,and the speed of feeding seedlings should not be too fast because of the restriction of the operator’s feeding speed.The low efficiency of seedling supply of semi-automatic transplanter is the main factor leading to the difficulty of large-scale popularization.Studying the efficient and stable seedling supply device will fundamentally solve the problem of low efficiency of transplanting,and then improve the efficiency and quality of transplanter operation.Based on the analysis of the research status of transplanter seedling feeding devices at home and abroad,the paper bowl plate developed by our research group was taken as the research object.Firstly,through the study of the physical characteristics such as the structure and mechanical characteristics of the seedling plate,the overall structure size of the paper bowl plate and the maximum friction angle,tangential force and pressure resistance of the paper seedling bowl plate were obtained.Secondly,on the basis of the research on the physical characteristics of bowl tray,a L-type seedling-feeding experimental device matched with seedling-guiding tube transplanter is designed.The three-dimensional model of seedling-feeding experimental device is established by UG software.The key components of the device,such as cutting and seedlingfeeding mechanism,are simulated and analyzed.The simulation results meet the design requirements.Please.Finally,a seedling-feeding test device based on single-chip computer control is built.Through single-factor experiments,the factors affecting the success rate of seedling-feeding are determined as follows: the angle of seedling-feeding,the speed of seedlingfeeding mechanism and the speed of saw blade;the order of the above-mentioned factors and the best score are determined by the orthogonal rotation combination test of three-dimensional quadratic regression.The optimum combination of seedling effect parameters,i.e.the angle of seedling supply is 15 degrees,the speed of transportation is 0.11 m/s,and the speed of saw blade is 130 r/s,the success rate of seedling division reaches 88.3%.The results of this study can provide a reference for the development of semi-automatic seedling-guiding tube transplanter to full-automatic planting.