Authors

Abstract

In order to solve the problem that the current precision seeder is difficult to precision seed pepper seeds, an air-suction pepper seed metering device based on air supply and quantitative seed supply was developed. Combined with its basic structure and working principle, the CFD-DEM coupling method was used for analysis, and the best combined hole parameters was obtained. Designed a single factor experiment with the pass rate, rebroadcast rate, and missed broadcast rate as experimental indicators. Regression model was established to obtain a reasonable range of each parameter. The results showed that when the speed of barrel of the drum was 28.65r/min and the working negative pressure was 4.40kPa, the seeding pass rate of the seed meter was 91.32%, the replay rate was 4.51%, and the missed rate was 4.17%. The comprehensive performance index was better.

Abstract in English

针对目前精密排种器难以对辣椒种子进行精密播种的问题，本文设计一种基于气送定量供种的气吸式辣椒排种器。结合其基本结构与工作原理运用CFD-DEM耦合方法进行分析，获得了最佳组合型孔结构。以合格率、重播率、漏播率为实验指标，设计单因素试验。通过正交试验建立回归模型，得到排种性能好时各参数的合理范围。实验结果表明：当滚筒转速为28.65r/min，工作负压为4.40kPa时，排种器排种合格率为91.32%，重播率为4.51%，漏播率为4.17%，排种性能好。