Authors

Abstract

In this paper, taking compound air-suction seed metering device as the subject, the effect rule of seed filling angle and seed releasing angle on the performance of seed filling and seed metering is studied. An indoor test was conducted with a JPS-12 metering test bench and a high-speed camera system. The starting and ending angles of the air chamber were changed by adjusting the regulating plate, that is, the angles of seed filling and seed releasing, and the filling and seed metering performance was taken as evaluation indexes. The test results show that: the seed filling angle has significant effect on the seed filling effect, and the miss fill index decreases with the increase of the quality of fill index. When the seed filling angle exceeds 50°, they will stabilize gradually ending at the multiple fill index of 0%. The negative pressure and operating speed are interactive and have a significant effect on filling performance. The seed releasing angle has significant effect on the metering performance. With the increase of the angle, the quality of feed index increases firstly and then decreases. The multiple index and miss index are opposite to the quality of feed index which is the max at the seed releasing angle of 39.5°. The negative pressure and forward speed are interactive and have a significant effect on metering performance. The quality of feed index under the same condition is lower than that of fill index.

Abstract in Chinese

本文以气吸式复合排种器为对象，研究充种和投种角度对充种性能和排种性能的影响规律。利用JPS-12排种试验台和高速摄像系统开展室内试验；通过气室调整盘改变气室的起止角度，即充种和投种的角度，以充种性能和排种性能作为评价指标。结果表明：充种角度对充种效果具有显著影响，充种合格率逐渐增大，漏充率逐渐减小，当充种角大于50°后，二者逐渐稳定，而重充率始终为0%，负压和作业速度对充种性能具有显著影响，且二者之间存在交互作用；投种角度对排种性能具有显著影响，随着角度的增大，合格率先升高后降低，重播率和漏播率与合格率呈现相反的变化规律，合格率最大时的投种角度为39.5°，负压与前进速度对排种性能具有显著影响，且二者之间存在交互作用；相同条件下的排种合格率低于充种合格率。