立式浅盆型复合种盘大豆排种器结构设计与参数优化

为满足机械式精密排种器高速作业的要求，以增加充填力的方式对立式圆盘排种器进行改进，设计了一种利用重力与离心力以及种子间相互作用力作为复合力进行充种的双腔立式浅盆型复合种盘机械式精密排种器，并对排种盘的特征参数进行了优化。利用离散元仿真分析软件EDEM对立式浅盆型种盘进行了以排种盘直径、折边倾角、作业速度为影响因素，充填率为性能指标的三因素五水平二次正交旋转组合仿真设计，并运用Design-expert 8.0软件对数据进行了处理，获得了排种盘最优的结构参数组合，同时利用物理样机试验进行了验证。研究结果表明：立式浅盆型种盘的最佳结构参数组合为排种盘直径234mm、折边倾角68°，在8 ~12km/h高速作业时，合格率均能达到90%以上。研究结果为产品定型提供了定量的依据。

Design and Parameter Optimization on Vertical Shallow-basin Type Composites Seed-plate Soybean Seed-metering Devices

To meet the working requirements of mechanical precision seed-metering device at high speed, a vertical shallow basin-type composite seed-plate seed-metering device with double cavity was designed, the seed-metering device might utilize gravity, centrifugal force and interaction force among the seeds to increase the filling force, improve the filling performance of seed-metering device at high speed. And in order to obtain the structure parameters of seed-metering devices to further improve the quality of precision seeding, the software of EDEM was utilized to make the three factors and five levels of all factors rotational quadratic orthogonal experiments which took the diameter of seed-plate, folding angle, working speed as the influence factors, and filling rate as the performance index， the experimental scheme was designed. And Design-expert 8.0 software was used to deal with the simulation data, the optimal structural parameters of the seed plate were obtained, the physical prototype test was made to verify the values of simulation. The experimental results show that when the diameter of seed plate is as 234mm, folding angle is as 68°, qualified rate may be beyond 90% at the high-speed area(working speed in the range of 8km/h to 12km/h), the optimized parameters may meet the demands of high speed operations, which will provide the basis and references for the product approval.