关键词: 马铃薯, 振动排种, 供种装置, 离散元法, 正交试验

Abstract: In response to the problem of low mechanization of potato block planting in hilly and mountainous areas, a doublehelix vibrating seed supply device was proposed. The EDEM simulation test was used to study the conveying process of the cutting potato in the hopper, and the orthogonal test was designed. The key parameters of the cutting potato vibrating seed supply device were optimized and the seed supply rate was improved by the response surface method. Through theoretical analysis and simulation experiments, it was shown that the factors affecting the conveying efficiency of cut potato materials included the working voltage of the vibration device, the pitch of a single track and the inclination angle of the bottom surface. The working voltage and the pitch of a single track adjusted the conveying rate by changing the movement speed of the material on the spiral track, while the inclination angle of the bottom surface was improved by changing the speed of the material dispersed into the spiral track. Through orthogonal experiment and response surface method, the optimal parameters were obtained as follows: working voltage was 200 V, single track pitch was 186.626 mm, hopper bottom inclination angle was 5.075°, and the maximum conveying rate was 214 grains/min, which met the demand of potato seed metering device. This study provided a theoretical reference for the subsequent precision seeding technology of potatoes in hilly and mountainous areas.

Key words: potato, vibration seeding, seed feed device, discrete element method, orthogonal test