Authors

Abstract

In order to solve the problems of easy seed shedding and poor seed population mobility during sowing, a precision seed metering tray for edible sunflowers with seed guide strips was designed in this paper. This article aims to adjust the adsorption posture of sunflower seeds by designing three types of structures: triangular seed guide strip, rectangular seed guide strip, and diamond seed guide strip. Seed population motion simulation and seeding performance experiments were conducted on the seeder. The experimental results show that adding a triangular seed guide strip to the seeding tray has the best disturbance effect on the seed population, with the highest proportion of seeds in the first adsorption stance seed (the seed centroid was adsorbed) and the highest qualification index. The working parameters for the best seed metering performance were obtained: the rotating speed of the seed metering disc was 8.41 r/min, and the vacuum degree was 3.5 kPa.

Abstract in Chinese

为提高气吸式食葵排种器的排种性能，解决播种过程中种子易脱落、种群流动性差等问题，本文以调整食葵种子的吸附姿态为切入点，对气吸式排种器排种盘进行了设计改进，设计了三角形导种条、矩形导种条、菱形导种条3种结构，并对排种器进行了种群运动仿真和排种性能试验。试验结果表明，增加三角形导种条的排种盘，对种群扰动效果最好，姿态一（种子质心被吸附）种子比例最高，合格指数最高。得到三角形导种条排种盘排种性能最佳时的工作参数：排种盘转速8.41 r/min，真空度3.5 kPa。