Effects of seeds morphology on pressure distribution in the cone hole of air-blowing seed-metering device based on CFD

2017 ◽  
Author(s):  
Dandan Han ◽  
Dongxing Zhang ◽  
Li Yang ◽  
Tao Cui ◽  
Zhendong Wang ◽  
...  
Keyword(s):  
Pressure Distribution ◽  
Air Blowing ◽  
Seed Metering Device

scholarly journals Design and Experimental Study of the General Mechanical Pneumatic Combined Seed Metering Device

2021 ◽  
Vol 11 (16) ◽  
pp. 7223
Author(s):  
Dengyu Xiong ◽  
Mingliang Wu ◽  
Wei Xie ◽  
Rong Liu ◽  
Haifeng Luo
Keyword(s):  
High Efficiency ◽  
Cone Angle ◽  
General Purpose ◽  
Optimal Performance ◽  
Air Velocity ◽  
General Properties ◽  
Response Surface Optimization ◽  
Damage Rate ◽  
Air Blowing ◽  
Seed Metering Device

To address the problems of high damage rate, low seeding accuracy, and poor seeding generally in the seeding process, a general-purpose seeding device was designed in this study based on the principle of mechanical pneumatic combined seeding. The air-blowing-type cleaning and seed unloading of the device laid the conditions for precise seeding and flexible seeding. In addition, single-factor experiments were performed on seeds (e.g., soybeans, corn, and rape-seeds) with different particle sizes and shapes to verify the general properties of the seed metering device. A multi-factor response surface optimization experiment was performed by applying soybean seeds as the test object to achieve the optimal performance parameters of the seed metering device. At a seed-clearing air velocity of 16.7 m/s, a seed feeding drum speed of 13.7 r/min, and a hole cone angle of 35.6°, corresponding to the optimal performance index, the qualified index, the replay index, and the missed index reached 97.94%, 0.03%, and 2.03%, respectively. The verification test results are consistent with the optimized ones. As indicated from the results, the seed metering device exhibits good general properties, low damage rate, great precision, and high efficiency; it is capable of meeting general seeding operations of different crop seeds and technically supporting for the reliability and versatility of the seeder.

scholarly journals Discrete Particle Simulation of Gas-Solid Flow in Air-Blowing Seed Metering Device

2021 ◽  
Vol 127 (3) ◽  
pp. 1119-1132
Author(s):  
Zhengquan Li ◽  
Pei Zhang ◽  
Yongchang Sun ◽  
Chenglin Zheng ◽  
Liang Xu ◽  
...  
Keyword(s):  
Particle Simulation ◽  
Solid Flow ◽  
Discrete Particle ◽  
Air Blowing ◽  
Discrete Particle Simulation ◽  
Seed Metering Device

DEM-CFD coupling simulation and optimization of an inside-filling air-blowing maize precision seed-metering device

2018 ◽  
Vol 150 ◽  
pp. 426-438 ◽  
Author(s):  
Dandan Han ◽  
Dongxing Zhang ◽  
Huirong Jing ◽  
Li Yang ◽  
Tao Cui ◽  
...  
Keyword(s):  
Simulation And Optimization ◽  
Air Blowing ◽  
Seed Metering Device

THEORETICAL CONSIDERATION OF AN OSCILLATING ARC PRESSURE DISTRIBUTION

2006 ◽  
Vol 10 (4) ◽  
pp. 537-548
Author(s):  
T. Yamamoto ◽  
I. Kuno ◽  
Koichi Takeda ◽  
Takehiko Toh ◽  
Jim Tanaka ◽  
...  
Keyword(s):  
Pressure Distribution ◽  
Theoretical Consideration ◽  
Arc Pressure
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