Authors

Abstract

To address the challenges of low precision and limited mechanization in the precision seeding of field-grown Fritillaria, a belt-type precision seeder with metering cells was developed. Based on TRIZ theory, a conical–cylindrical cell with a hemispherical bottom was designed. The belt metering mechanism, driven by an electric motor, operated in coordination with a brush-type seed-retaining plate to achieve precision seeding of Fritillaria. The overall design of the machine was validated using EDEM simulation. Orthogonal experiments were conducted with forward speed, cell diameter, and seed drop height as test factors, and the seeding qualification rate as the evaluation index. The results showed that the optimal parameter combination was a forward speed of 0.88 km/h, a cell diameter of 24 mm, and a seed drop height of 75 mm. Under these conditions, the qualification rate reached 93.16%, meeting the requirements for precision seeding of Fritillaria.

Abstract in Chinese

针对大田平贝母精量播种精确度差、机械化程度低的技术难题，设计了一种平贝母皮带窝眼式精量播种机。基于TRIZ理论设计了一种锥柱形半球底式型孔，并采用电机驱动该窝眼机构与毛刷式护种板协同工作，完成平贝母的精量播种作业。采用EDEM离散元仿真验证了整机的合理性。以前进速度、型孔直径、投种高度为试验因素，以播种的合格率为评价指标进行正交试验，结果表明：最佳工作参数组合为前进速度为0.88km/h、型孔直径为24mm、投种高度为75mm，此时合格率为93.16%，符合平贝母精量播种要求。