Design and Experiment with a Double-Roller Sweet Potato Vine Harvester

The yield of sweet potato vines is large, making it a good source food. However, difficult to harvest due creeping and intertwining. Therefore, according the domestic planting model, this paper designed double roll vine harvester which can complete operations picking, killing, conveying header harvesting at one time. machine adopts process front rear killing rod bar lifting. key components picking device, device lifting were calculated. A numerical simulation test was carried out by using discrete element method. It determined that length from outside inside 175 mm, 150 mm 105 respectively, inclination angle end 160°. There are six knives on each knife plate. 50°and speed 3 m/s. Using box Behnken experimental design method, taking roller speed, ground clearance as factors, rate, stubble height injury rate evaluation indexes, quadratic regression orthogonal out, effects various factors indexes analyzed, optimized verified. results showed optimal parameter combination follows: rotation should be 716 r/min, 1960 r/min 16 mm. With these parameters, 93.1%, 29.5 0.174%. As such, meets requirements for mechanized great significance light simplified product industry.