花生排种器型孔结构的优化设计与试验

为解决现有花生排种器对种子尺寸适应性差的问题，设计了由调整片控制种窝尺寸大小的内充型孔轮式花生排种器．以单穴单粒率、重播率、漏播率为试验指标，以排种器转速、种窝长度、种子大小为试验因素进行二次正交旋转组合试验．试验结果表明，影响排种性能的主次顺序为：种窝长度、种子大小、排种器转速．在转速４０ｒ／ｍｉｎ，种窝长度９ｍｍ，种子大小１５.６ｍｍ的条件下，排种性能最佳，单穴单粒率９５.３％，重播率２.７％，漏播率２.２％．结果表明，通过调整种窝长度控制排种器的排种量，使排种器对种子尺寸具有良好的适应性．

Optimization design and test of the pore structure of peanut seed-metering device

In order to solve the problem of poor adaptability of existing peanut seed metering devices toseed size，an a internal filling metering device hole-wheel type peanut seed metering device was de-signed，in which the size of seed nest was controlled by regulator． The single seed rate，replaying rateand missing seeding rate of a single hole were used as test indexes，quadratic orthogonal rotary combina-tion experiment was carried out with the rotational speed of seed metering device，the length of seed nestand the size of seed as experimental factors． The Ｒresults showed that the order of their effectiveness toSeed-metering Performance was as follows: length of filling hole，seed size，speed of wheel． The parame-ter optimization of the model was that when the rotate speed of seed plate was 40 r/min，the length of fill-ing hole was 9 mm，seed size was 15. 6 mm，the Performance was the best，which leaded to the singleseed rate was 95. 3%，repeat rate was 2. 7% and omitting rate was 2. 2%． The seed meter was suitablefor seed size through adjusting the length of filling hole control the seeding capacity．