Design and Test on Mixing Component of Air-assisted Centralized Metering Device for Rapeseed and Wheat

被引：0
|
作者：
Wang L. [1 ,2 ]
Liao Y. [1 ,2 ]
Wan X. [1 ,2 ]
Wang B. [1 ,2 ]
Hu Q. [1 ,2 ]
Liao Q. [1 ,2 ]
机构：
[1] College of Engineering, Huazhong Agricultural University, Wuhan
[2] Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River, Ministry of Agriculture and Rural Affairs, Wuhan
来源：
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | 2022年 / 53卷 / 02期
关键词：
Air-assisted centralized metering device; DEM-CFD; Mixing component; Rapeseed and wheat; Venturi mixing seed chamber;
D O I：
10.6041/j.issn.1000-1298.2022.02.007
中图分类号：
学科分类号：
摘要：
Considering the problem that the pressure gradient change direction in mixing component does not match with seed conveying direction during seeding process, causing backflow and counterflow of seeds, which leads to each row seeding uniformity of centralized metering lower, a prototype of mixing component based on Venturi principle was developed. The main structure and key parameters of the Venturi mixing seed chamber and conveying seed tube were determined. The effects of airflow velocity, seed velocity, and structure of mixing component on total pressure loss were analyzed. The DEM-CFD coupled simulation was used to compare and analyze the effects of three kinds of conveying seed tube and two kinds of Venturi mixing seed chamber on seed migration trajectory, airflow pressure distribution and conveying seed performance. The simulation results showed that the combination of Venturi mixing seed chamber with accelerating mixing section and the conveying seed tube with elbow joint had better conveying seed performance, and the variation coefficient of seed quantity consistency of each area for rapeseed and wheat in the vertical section of conveying seed tube was 9.63% and 13.43%, respectively. The intelligent test platform for planting machines was used to carry out the test of the effect of better combination of mixing component on the seeding performance. The bench test results indicated that the backflow rate of rapeseed was less than 3.2%, there was no counterflow of rapeseed, and backflow and counterflow of wheat seed. The uniformity variation coefficient of seeding quality of rapeseed and wheat was less than 5% and 3.9%, respectively. The stability variation coefficient of total seeding quality of rapeseed and wheat was less than 1.15%% and 1.35%, respectively, which met the performance requirements of rapeseed and wheat seeding. The research can provide a reference for the structure improvement of the mixing component of air-assisted centralized metering device. © 2022, Chinese Society of Agricultural Machinery. All right reserved.
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页码：68 / 79and97
页数：7929
相关论文
共 25 条
  • [1] LEI Xiaolong, YANG Wenhao, LIU Liyang, Et al., Design and experiment of seed hill feeding device in pneumatic centralized metering device for hybrid rice, Transactions of the Chinese Society for Agricultural Machinery, 49, 11, pp. 58-67, (2018)
  • [2] YANG B, MELIKOV A K, KABANSH A, Et al., A review of advanced air distribution methods-theory, practice, limitations and solutions, Energy and Buildings, 202, 11, pp. 1-27, (2019)
  • [3] WANG Lei, LIAO Yitao, ZHANG Qingsong, Et al., Design on profiling chisel opener of precision broad width no-tillage planter for rapeseed and wheat, Transactions of the Chinese Society for Agricultural Machinery, 50, 11, pp. 63-73, (2019)
  • [4] MUDARISOV S, BADRETDINOV I, RAKHIMOV Z, Et al., Numerical simulation of two-phase "air-seed" flow in the distribution system of the grain seeder, Computers & Electronics in Agriculture, 168, 1, pp. 1-7, (2020)
  • [5] YANG Qinglu, WANG Qingjie, LI Hongwen, Et al., Structural optimization and experiment of pneumatic centralized fertilizer system, Transactions of the CSAE, 36, 13, pp. 1-10, (2020)
  • [6] WANG Yingbo, LI Hongwen, WANG Qingjie, Et al., Design and experiment of wheat mechanical shooting seed-metering device, Transactions of the Chinese Society for Agricultural Machinery, 51, pp. 73-84, (2020)
  • [7] LIAO Yitao, LI Chengliang, LIAO Qingxi, Et al., Research progress of seed guiding technology and device of planter, Transactions of the Chinese Society for Agricultural Machinery, 51, 12, pp. 1-14, (2020)
  • [8] GAO Xiaojun, XU Yang, YANG Li, Et al., Simulation and experiment of uniformity of Venturi feeding tube based on DEM-CFD coupling, Transactions of the Chinese Society for Agricultural Machinery, 49, pp. 92-100, (2018)
  • [9] YATSKUL A, LEMIERE J P, COINTAULT F., Influence of the divider head functioning conditions and geometry on the seed's distribution accuracy of the air-seeder, Biosystems Engineering, 161, 9, pp. 120-134, (2017)
  • [10] YATSKUL A, LEMIERE J P., Establishing the conveying parameters required for the air-seeders, Biosystems Engineering, 166, 2, pp. 1-12, (2018)
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