Design and Experiment of Air-assisted Linear Seeding Device for Wheat
Abstract
An air-assisted linear seed seeding device for wheat was created in order to address the issue that the pressure gradient’s change direction in the air-assisted seed seeding device is inconsistent with the direction of seed movement, leading to seed backflow or collision and decreasing the stability of grain spacing. To simulate the seeding process, a CFD-DEM unidirectional coupling simulation model was developed, which was based on the mathematical model of gas-solid two-phase flow. According to the simulation results, the length of the pipeline and the inlet pressure had a big impact on the flow field’s pressure distribution and overall pressure loss. The seeding device’s flow field had a uniform pressure distribution, and the direction of the pressure gradient change corresponded with the direction in which the seeds migrated.Wheat seeds followed a “straight-curve-straight line” motion path that avoided collisions and backflow. Inlet pressure, pipeline length, and operating speed were used as test factors in the response surface optimization test, and the grain distance variation coefficient served as the test evaluation index. The test findings indicated that inlet pressure, operating speed, and pipeline length were the primary and secondary factors influencing the grain distance variation coefficient. Operating speed and pipe length were influenced by inlet pressure. Through parameter optimization, the following parameters were found to be the best combinations: operation speed of 0.11m/s, pipeline length of 24.2cm, and inlet pressure of 5.1kPa.The soil tank test confirmed that under these conditions, the average grain spacing was 5.3cm and the coefficient of grain spacing variation was 6.3%, meeting the agronomic requirements for precise, uniform wheat sowing. By addressing the issues of wheat seed backflow and collision, air-assisted linear seeding may greatly enhance seeding performance and offer technical assistance for accurate and consistent wheat sowing.
Keywords: wheat;air-assisted;seed falling device;CFD-DEM;experiment
Download Full Text:
PDFReferences
LI Zhui. Effects of planting methods and planting density on population construction and yield of winter wheat [D]. angling: Northwest A&F University ,2022.
HOU Jialin,MA Duanxu,LI Hui,et al. Design and experiment of pneumatic centrifugal combined precision seed metering device for wheat [ J ]. Transactions of the Chinese Society for Agricultural Machinery ,2023 ,54( 10) ;35 -45. (in Chinese)
HE Ketao. Design and experimental study of shoe к-absorbent pneumatic wheat precision seed discharge device [D]. Taian: Shandong Agricultural University,2023. (in Chinese)
WANG Yingbo,LI Hongwen,HU Hongnan,et al. A noncontact self-suction wheat shooting device for sustainable agriculture; a preliminary research [j]. Computers and Electronics in Agriculture,2022 ,197 :106927.
MA Xinchun,GONG Qixiang,WANG Qingjie,et al. Design of an air suction wheel-hole single seed drill for a wheat plot dibbler [J]. Agriculture,2022,12( 10) : 1735.
LIAO Yitao,LI Chengliang, LIAO Qingxi,et al. Research progress of seed guiding technology and device of planter [J]. Transactions of the Chinese Society for Agricultural Machinery ,2020 ,51 ( 12) :1 - 14.
LI Yuhuan,YANG Li, ZHANG Dongxing, et al. Analysis and test of linear seeding process of maize high speed precision metering device with air suction [ J ]. Transactions of the CSAE, 2020,36(9) :26 -35.
WANG Yunxia,ZHANG Wenyi,YAN Wei,et al. Design and experiment of seed pressing device for precision seeder based on air flow assisted seed delivery [J]. Transactions of the Chinese Society for Agricultural Machinery, 2020 , 51 (10): 69 - 76.
Vaderstad Group. Tempo planter[ EB/OL . ( 2022 - 03 — 13 ) [ 2023 - 09 — 25 . https; // www. vaderstad. com/en/planting/ tempo-planter/.
Maschio Gaspardo. High speed precision planters-CHRONO [ EB/OL]. (2023 - 01 - 01 ) [ 2023 - 09 - 25 ]. https; // www. maschiogaspardo. com/en/web/international/chrono.
KVERN ELAND. A-DRILL[ EB/OL]. (2023 -01 -01) [2023 - 09 - 25]. https://ien. kverneland. com/Seeding-Equipment/ other-seed-drills/kverneland-a-drill.
XU Jin. Design and experiment of annular air blowing auxiliary seed guide device for maize no-till seeder [D]. Hefei; Anhui Agricultural University,2022.
IJU Rui.LIU Yunqiang,LIU Zhongjun,et al. Research on positive pressure airflow assisted blowing and seed guiding device of corn high-speed precision planter[J ]. Transactions of the Chinese Society for Agricultural Machinery ,2023 ,54 (7) : 156 - 166.
LIU Rui,LIU Lijing,LI Yanjun,et al. Numerical simulation of seed-movement characteristics in new maize delivery device [J]. Agriculture ,2022 ,12(11): 1944.
TANG Han, XU Fudong,GUAN Tianvuan, et al. Design and test of a pneumatic type of high-speed maize precision seed metering devicefj . Computers and Electronics in Agriculture ,2023 ,211 :107997.
WANG Chao, LI Hongwen,ME Jin,et al. Design and experiment of pneumatic wheat precision seed casting device in rice-wheat rotation areas [J] . Transactions of the Chinese Society for Agricultural Machinery ,2020 ,5 1 (5) ;43 -53.
WANG Chao, LI Hongwen, HE Jin,et al. Optimization design of a pneumatic wheat-shooting device based on numerical simulation and field test in rice-wheat rotation areas [j]. Agriculture,2022,12( 1 ) ;56.
JIANG Meng. Research on key techniques of precision sowing and detection method of sowing amount of wheat [D]. Beijing: China Agricultural University,2022. (in Chinese)
LIANG Yuvue. Design and experiment of air-blown precision seed discharge device for rice and wheat in dry farming [D]. Wuhan; Huazhong Agricultural University,2023.
WANG Lei, LIAO Yitao,WAN Xingvu,et al. Design and test on mixing component of air-assisted centralized metering device for rapeseed and wheat [J]. Transactions of the Chinese Society for Agricultural Machinery, 2022, 53 (2); 68 - 79,97.
Refbacks
- There are currently no refbacks.
