Author:
Liu Rui,Liu Lijing,Li Yanjun,Liu Zhongjun,Zhao Jinhui,Liu Yunqiang,Zhang Xuedong
Abstract
The delivery device is one of the key components in ensuring uniform grain spacing and achieving high-speed precision seeding. In this paper, a new type of high-speed airflow-assisted delivery device for maize is presented. The gas–solid flow in the delivery device was numerically studied by the coupling method of CFD and DEM. The influence of the structural parameters of the delivery device on the movement of the seeds and the airflow field was analyzed in detail. The matching relationship between the inlet-airflow velocity and the operating speed of the seeder was explored. The results show that the position of the intake seed chamber mainly affects the negative pressure in the distribution area of the mixing chamber. The increase in the shrinkage angle results in the decrease in pressure loss and the decrease in airflow velocity in the delivery chamber. As the diffusion angle increases, the airflow forms a stable straight jet flow and the airflow velocity in the delivery chamber increases. As the ejection angle increases, the bouncing degree of the seed decreases, thereby ensuring the consistency of the seed-ejection direction. The research results show that, when the intake seed chamber is located in the middle, the shrinkage angle is 70°, the diffusion angle is 30°, and the exit angle is 60°, the air-assisted delivery device has better performance. With the increase in inlet wind speed, the seed-ejection speed can also be increased according to a certain proportion, which can meet the requirements of zero-speed seeding and ensure the uniformity of seed spacing, providing a new seed delivery scheme. In the future, if invasive damage to the seed shell is guaranteed to be minimized in high-speed airflow, the new delivery device can meet the requirements of precision seeding under high-speed conditions.
Funder
Major Science and Technology Special Task Plan of China Machinery Industry Corporation Limited
Subject
Plant Science,Agronomy and Crop Science,Food Science
Reference37 articles.
1. National Bureau of Statistics (2020). China Statistical Yearbook, 1978–2020, China Statistical Publishing House. (In Chinese with English Abstract).
2. Global overview of research progress and development of precision maize planters;Int. J. Agric. Biol. Eng.,2016
3. Research Progress on Precision Planting Technology of Maize;Trans. Chin. Soc. Agric. Mach.,2016
4. Design and experiment of clamping maize precision seed-metering device;Trans. Chin. Soc. Agric. Mach.,2019
5. DEM study of particle motion in novel high-speed seed metering device;Powder Technol.,2021
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