Optimization of a three-row air-suction Brassica chinensis precision metering device based on CFD-DEM coupling simulation  

作　　者：Xinping Sun Hua Li Xindan Qi Dinghao Feng Jianqi Zhou Yongjian Wang Samuel Mbugua Nyambura Xiaoyu Zhang Xi Chen 

机构地区：[1]College of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China [2]Key Laboratory of Intelligent Agricultural Equipment in Jiangsu Province,Nanjing Agricultural University,Nanjing 210031,China [3]College of Engineering,Nanjing Agricultural University,Nanjing 210031,China [4]Jiangsu Xuzhou Transportation Planning and Design Institute,Xuzhou 221000,China

出　　处：《International Journal of Agricultural and Biological Engineering》2023年第3期130-142,共13页国际农业与生物工程学报（英文）

基　　金：This research was financailly supported by the National Key R&D Program of China“Vegetable Intelligent Fine Production Technology and Equipment R&D”(Grant No.2017YFD0701302).

摘　　要：This study aimed to optimize a three-row air-suction Brassica chinensis precision metering device to improve the low seeding performance.ANSYS 17.0 Software was used to analyze the effect of different numbers of suction holes and different suction hole structures on the airflow field.It was found that a suction hole number of 60 was beneficial to the flow field stability and a conical hole structure was beneficial to the adsorption of seeds.Box-Behnken design experiments were carried out with negative pressure,rotational speed,and hole diameter as the experimental factors.The optimal parameter combination was achieved when the negative pressure was 3.96 kPa,the rotational speed of the seeding plate was 1.49 rad/s and the hole diameter was 1.10 mm.The qualification rate of inner,middle,and outer rings were 87.580%,90.548%,and 90.117%,respectively,and the miss seeding rate of inner,middle,and outer rings were 10.915%,7.139%,and 5.920%,respectively.

关 键 词：Brassica chinensis metering device airflow field Box-Behnken design 

分 类 号：S567[农业科学—中草药栽培]