Design and Simulation Optimization of Seed Picking Spoon for Cut-potato Tubers
Cutting potatoes before planting is an effective way to save seed costs and break seed dormancy.Aiming at the problem that the traditional round seed picking spoon of potato planter is poorly adapted to the cut-potato tubers,resulting in high miss-planting rate and low sowing qualification rate,the seed picking spoon of potato planter was designed and simulation optimization.On the basis of determining the mechanical characteristic parameters of potato tubers,a discrete elemental model of cut-potato tubers was constructed by using EDEM software and selecting the Hertz-Mindlin contact model.By analyzing the state of seed picking and seed filling,a notched potato seed picking spoon was designed based on the traditional round seed picking spoon,and the main factors affecting the effect of seed picking were determined.A three-factor,three-levels virtual orthogonal simulation test was carried out using the incision center angle,incision depth and number of incisions as test factors,and the successful seeding rate,reseeding rate and missed seeding rate as evaluation indexes.The results of orthogonal test showed that the seed picking ability of incision type spoon was significantly better than that of traditional round seed picking spoon,and its working effect was optimal when the incision center angle was 60°,the incision depth was 15mm,and the number of the incisions was 3.The optimized seed picking spoon was used to conduct a cut-potato seed planting validation test,which showed that the successful seeding rate was 82.2%,the reseeding rate was 7.1%,and the missed seeding rate was 10.7%.Compared with the traditional round seed picking scoop,its missed seeding rate was reduced by about 12 percentage points and the successful seeding rate was improved by about 12.5 percentage points.
potatocut-potato tubersseed picking spoonEDEMorthogonal test
国家科技期刊平台
NSTL
万方数据
维普
