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
  • [11] LI Zhaodong, WANG Qingqing, ZHANG Yalan, Et al., Design and experiment of inclined parabolic cell wheel in seed feeding device for wheat, Transactions of the Chinese Society for Agricultural Machinery, 49, 5, pp. 116-124, (2018)
  • [12] XING Hechen, Design and experiment on slot wheeled centralized metering system for rapeseed and wheat, (2019)
  • [13] WANG Lei, LIAO Yitao, ZHANG Qingsong, Et al., Experiments and analysis on seeding performance of seed feeding device of rapeseed centralized metering device under lateral tilt, Transactions of the CSAE, 36, 19, pp. 1-10, (2020)
  • [14] LEI Xiaolong, LIAO Yitao, ZHANG Wenyu, Et al., Simulation and experiment of gas-solid flow in seed conveying tube for rapeseed and wheat, Transactions of the Chinese Society for Agricultural Machinery, 48, 3, pp. 57-68, (2017)
  • [15] CHANG Jinli, ZHANG Xiaohui, Design and test of one-step centralized type pneumatic seeding system, Transactions of the CSAE, 27, 1, pp. 136-141, (2011)
  • [16] YATSKUL A, LEMIERE J P, COINTAULT F., Comparative energy study of the air-stream loading systems of air-seeders, Engineering in Agriculture, Environment and Food, 11, 1, pp. 30-37, (2018)
  • [17] KUMAR V J F, DURAIRAJ C D., Influence of head geometry on the distributive performance of air-assisted seed drills, J. Agric. Engng. Res, 75, 1, pp. 81-95, (2000)
  • [18] LI Yanjun, LIU Youhua, LIU Lijing, Distribution mechanism of airflow in seed tube of different lengths in pneumatic seeder, Transactions of the Chinese Society for Agricultural Machinery, 51, 6, pp. 55-64, (2020)
  • [19] (1989)
  • [20] HU Keji, The research on Venturi feeder in pneumatic conveying system, (2013)
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