关键词: 花生播种机, 种沟开沟器, 设计, 优化, EDEM仿真, 试验

Abstract: Aiming at the problems of seed channel opener for peanut seeder such as instability of seed channel shape and large traction resistance due to high soil moisture content in hilly areas in Southern China, a seed channel opener for peanut seeder suitable for soil in southern China was designed. Combined with the parameters of the soil model in Southern China, the operation parameters of the seed channel opener were optimized by discrete element simulation and soil groove test. The model of soil and the seed channel opener were established using EDEM platform. Taking opening depth of seed channel opener, angle between wings and soil entry angle as test factors, and the channel shape coefficient and traction resistance as evaluation indexes, combined with response surface method, Box-Behnken tests were carried out to study the influence rule of each factor and its interaction on the operation effect of the opener. The optimal parameter combination was determined as follows: opening depth of 40 mm, angle between wings of 98° and soil entry angle of 144°. Compared with the results of the simulation test and the soil groove test, the error of channel shape coefficient and traction resistance was 3.78% and 6.68%, respectively. Based on the combination of the optimal operating parameters, the channel shape coefficient of 1.02 and the traction resistance of 46.3 N were obtained in the soil groove test. This study improved the performance of the seed channel opener and provided  theoretical reference for the design of the seed channel opener for peanut seeder in the hilly areas of southern China.

Key words: peanut seeder, seed channel opener, design, optimization, EDEM simulation, experiment