Optimized design of the pneumatic precision seed-metering device for carrots  

作　　者：Dinghao Feng Xinping Sun Hua Li Xindan Qi Yongjian Wang Samuel Mbugua Nyambura 

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]CSSC Jiangnan Shipyard(Group)Co.,Shanghai 201913,China

出　　处：《International Journal of Agricultural and Biological Engineering》2023年第6期134-147,F0003,共15页国际农业与生物工程学报（英文）

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

摘　　要：The small size, light weight, irregular shape, and impurities that characterize seed groups increase clogging tendencies in the traditional seed-metering device thereby making it difficult to achieve high-speed precision seeding. A pneumatic seed-metering device with good seed-filling performance for carrot was designed in this study. By analyzing the movement state of seeds in the device under the theoretical condition, it was concluded that the minimum critical negative pressure value of air chamber was 0.32 kPa, which provided a theoretical basis for simulation and testing. ANSYS 17.0 Software was used to simulate the shape of the seeding plate hole. By comparing the pressure, air flow stability between the suction surface and the plug removal surface of the convection field, it was concluded that the conical hole was optimal. A bench verification test was conducted on the device. The average qualified rate, missing rate, and replaying rate were 81.48%, 4.07%, and 14.45%, respectively, which provided a strong reference for the design of carrot precision seed-metering device.

关 键 词：seed-metering device CARROT precision seeding bench verification test 

分 类 号：S223.2[农业科学—农业机械化工程]