本文在试验基础上阐明了纹盘排种器的排种工艺原理,播量稳定性与前进速度的关系,排种过程种子受力分析及排量变化规律。提出了确定纹盘间隙和极限排种孔距的设计原则。在此基础上研制成14行纹盘式集中排种系统,其排种均匀性和各行排量一致性等性能指标,均已达到先进水平。 Based on the experiment, this paper clarifies the principle of seed rowing, the relationship between the sowing stability and the advancing speed, the seed stress analysis and the change rule of the displacement during seed seeding. The design principle of determining the plate gap and the limit seed distance is proposed. On the basis of this, we developed a 14-row central-type plate-type seed-metering system, and the performance indexes such as the uniformity of seed-rowing and the consistency of discharge of each row have reached the advanced level.