Design and experiment of pneumatic seed clearing mechanism for pin-hole tube wheat plot precision sowing device
作者机构：School of Mechanical and Electrical EngineeringHainan UniversityHaikou 570228China College of EngineeringChina Agricultural UniversityBeijing 100083China Sanya Nanfan Research Institute of Hainan UniversitySanya 572025HainanChina
出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)
年 卷 期：2023年第16卷第4期
页 面：85-95页
核心收录：
基 金：the National Natural Science Foundation of China(Grant No.52175260) the China Agriculture Research System(Grant No.CARS-03) the Key Research and development plan of Hainan Province(Grant No.ZDYF2022XDNY184) Project of Scientific Research in Colleges and Universities of Hainan Province(Grant No.Hnky2022-93) Research Start-up Fund Project of Hainan University(Grant No.KYQD(ZR)-22036) the authors wish to thank them for their generous financial assistance
主 题：wheat precision seed-metering device clearing seed positive pressure airflow jet flow field
摘 要：For the problem that when wheat is sucked up by the air suction method,the seeds are aligned in a small area,making it difficult for the contact seed cleaning mechanism to clean the *** mechanism of seed cleaning airflow on wheat seed was studied,the flow velocity distribution relationship of the jet section was defined,the mathematical model of the jet velocity of circular and plane sections was established,and the key factors that could have a significant influence on seed cleaning effect were explored.A non-contact positive pressure air flow seed cleaning method was *** theoretical calculations,it is concluded that the core section lengths of the circular section jet and the inline jet are 24.8 mm and 28.8 mm,*** clearing distance is set to 20 *** the single-factor test,the best air tube nozzle shape was clarified as a vertical inline *** angle of seed cleaning,the air velocity of seed cleaning,and the negative supply pressure were selected as influencing factors,and the seed leakage index,seed reabsorption index,and seed qualification index as the evaluation indicators to conduct a 3-factor 5-horizontal rotation test.A mathematical regression model of influencing factors and evaluation indexes was established to analyze the influence of these factors and *** optimal operation parameters were obtained as the seed cleaning Angle of 19°,the seed cleaning air velocity of 58 m/s,and the negative pressure of 8.5 *** the optimal parameters,the seed leakage suction index is 8.23%,the seed reabsorption index is 0.33%,and the seed qualification index is 91.44%,which meets the design requirements.
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