关键词: 甘薯, 除草, 中耕, 离散元法

Abstract: As the key working parts of sweet potato weeding machine, the structure and performance of weeding parts will directly affect the working effect of the machine. The current weeding component structure can only achieve ditch bottom weeding, but can not achieve ridge side weeding. According to the ridge parameters of sweet potato planting and the actual operation requirements, a cone weeding component is designed. The structure design increases the operation area, increases the function of weeding in the ridge side on the basis of the original ditch bottom weeding, and improves the operation performance of the machine. The working parameters and structural parameters of the cone weeding component were analyzed and calculated theoretically, and the simulation test was carried out by using the discrete element method. Compared with the traditional weeding component, the soil crushing rate increased by 11.31%, the power increased by 473%, and the operation coverage area increased by 133.33%, which fully verified the feasibility of the design.

Key words: sweet potato, weeding； intertillage, discrete element method