Design and experiment of soybean high⁃speed precision vacuum seed metering with auxiliary filling structure based on DEM⁃CFD

被引：0
|
作者：
Wang G.-W. [1 ]
Xia X.-M. [1 ]
Zhu Q.-H. [1 ]
Yu H.-Y. [1 ]
Huang D.-Y. [1 ,2 ]
机构：
[1] College of Biological and Agricultural Engineering, Jilin University, Changchun
[2] Key Laboratory of Bionics Engineering, Ministry of Education, Jilin University, Changchun
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2022年 / 52卷 / 05期
关键词：
Agricultural engineering; Air-suction metering device; Mechanical structure supporting; Simulation analysis; Soybean;
D O I：
10.13229/j.cnki.jdxbgxb20211366
中图分类号：
学科分类号：
摘要：
Aiming at the problems of high pressure dependence and high power consumption of air suction soybean seed metering device during high-speed operation, based on Magicsem type air suction seed metering device, an air suction soybean high-speed precision seed metering device which can complete high-speed seed metering under low negative pressure was designed. In order to study the effect of metering device structure on air pressure uniformity, Ansys Fluent was used to simulate the air flow field of seed metering device. The seed filling performance of seed metering device under no negative pressure was simulated by EDEM. The effect of different population height on seed filling effect of seed metering device was analyzed by DEM-CFD coupling method. The seed metering device was processed according to the structural parameters optimized by simulation test, and the bench test of seed metering device was carried out. The results show that the minimum negative pressure of the seed metering device designed in this paper that can achieve stable seed is reduced by 5%~25 % compared with the Magicsem seed metering device. The results of the verification test on the effect of population height on seed metering performance are consistent with the results of the simulation test. The qualified rate of the optimized seed metering device is 95.04%, the reseeding rate is 1.91%, and the missing-seeding rate is 3.05%, when the negative pressure of the seed metering device is 4 kPa, the forward speed is 8 km/h, which meets the requirements of precision soybean sowing. © 2022, Jilin University Press. All right reserved.
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页码：1208 / 1221
页数：13
相关论文
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