Design and Optimization of Feeding Device for Pneumatic Seeder of Legume-Gramineae Mixed Sowing
DOI:
https://doi.org/10.54097/b2b35g96Keywords:
Feeding device, Venturi structure, Gas-solid two-phase flow, Simulation optimizationAbstract
To address the problems of uneven velocity and seed separation during the mixed feeding of alfalfa and smooth brome, which have significant differences in physical properties, a dedicated feeding device was designed based on the Venturi principle. The EDEM-Fluent gas-solid two-phase flow coupled simulation method was adopted to explore the effects of nozzle cross-sectional size, nozzle length and air inlet velocity on seed motion characteristics and flow field distribution. Multiple sets of simulation tests were carried out with the outlet velocity difference between the two grass seeds and airflow energy loss as evaluation indexes. The results show that the optimal parameter combination is a nozzle cross-section of 26 mm × 16 mm, a nozzle length of 30 mm, and an air inlet velocity of 14 m/s. Under this working condition, the outlet velocity difference between alfalfa and smooth brome is only 0.29 m/s, featuring high airflow conveying efficiency, low pressure loss and excellent gas-solid mixing performance. The research results can provide a theoretical reference for the structural design and operating parameter matching of the feeding device of legume-gramineae mixed pneumatic seeders.
Downloads
References
[1] Dean, J., Zhang, M. L., Xu, T. G., et al. (2015). Numerical and experimental study on Venturi jet device for gas-solid mixing. Vacuum, 111, 25–31. https://doi.org/10.1016/j.vacuum.2014.09.013
[2] Liao, Q. X., Lei, X. L., Liu, L. C., et al. (2017). Research status and development trend of pneumatic seed distributor. Transactions of the Chinese Society for Agricultural Machinery, 48(2), 1–13.
[3] Lei, X. L. (2017). Working mechanism and experiment of pneumatic seed distributor for rapeseed and wheat [Master’s thesis]. Huazhong Agricultural University, Wuhan.
[4] Xi, R. J. (2021). Design and simulation of key components for wheat pneumatic seed distributor [Master’s thesis]. Huazhong Agricultural University, Wuhan.
[5] Wen, X. Y., Jia, H. L., Zhang, S. W., et al. (2020). Experiment on particle suspension velocity measurement based on EDEM-Fluent coupling. Transactions of the Chinese Society for Agricultural Machinery, 51(3), 69–77.
[6] Yu, T., Liu, S. M., & Lei, M. Z. (2023). Simulation research on pneumatic separation and dust removal of soybean based on CFD-EDEM. Packaging and Food Machinery, 41(4), 45–50.
[7] Ye, F. P., Li, Y., Hu, J. Q., et al. (2017). Research on pneumatic conveying characteristics based on particle dynamics theory. Journal of Wuhan University of Technology, 39(5), 47–52.
[8] Yang, L., & Xie, Y. H. (2006). Pneumatic conveying engineering. China Machine Press, Beijing.
[9] Yatskul, A. I., & Lemiere, J. P. (2014). Experimental research on pneumatic seed conveying in air-seeders. INMATEH-Agricultural Engineering, 44(3), 39–46.
[10] Gao, X. J., Wang, S. T., Wu, X. P., et al. (2023). Migration characteristics of seed flow in booster pipe of pneumatic seed distributor for seeder. Transactions of the Chinese Society for Agricultural Machinery, 54(S1), 47–56, 75.
[11] Ye, F. P., Li, Y., Hu, J. Q., et al. (2017). Research on pneumatic conveying characteristics based on particle dynamics theory. Journal of Wuhan University of Technology, 39(5), 47–52.
Downloads
Published
Issue
Section
License
Copyright (c) 2026 Academic Journal of Applied Sciences
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
