Development and experiment of seed metering for grass plot seeder

摘要

In order to develop a grass plot seeder,which is suitable for cultivation of fine grass varieties,a seed metering test platform was developed which has a special designed transmission mechanism and a seed cup with an adjustable ring.Several kinds of seeds can be fed by feeding mechanism in feeding cup when seeding shaft as well as distributor cone rotates one complete revolution.Seed motion and the relationship between seed outlet and seed cup were analyzed in this paper.Result of orthogonal experiment showed that the number of sweeper blades was one of the main influencing factors of the variation coefficient of seeding uniformity.When 12 sweeper blades and 9 grooves cone were used in test,the variation coefficient of the Pacesetter's seeding uniformity got to the minimum value 16.46％.This research provides a reference for grass plot seeder's development.%为了研制适用于优良牧草栽培的牧草小区播种机,设计制作了牧草小区播种机排种器试验台.该试验台有一专门设计的转动机构和一个可调节的排种环,送种机构中的多个送种杯中的种子可以依次喂入排种系统,且分种锥旋转一周时,一个送种杯内的种子恰好播完.对种子在存种筒内的受力、运动过程和排种口尺寸的关系做了分析.试验台的排种正交试验表明,格盘插片的数量是影响种子分散均匀性变异系数的主要因素.当格盘数目为12,导流槽个数为9,并采用高丹草为试验对象时,均匀性变异系数为最小值16.46％.该文的研究可为牧草小区播种机的研究提供参考.