Performance Parameters Optimization of a Three-Row Pneumatic Precision Metering Device for Brassica chinensis

Sun, Xinping; Li, Hua; Qi, Xindan; Nyambura, Samuel Mbugua; Yin, Jiaqiao; Ma, Yunlong; Wang, Jinshuang

doi:10.3390/agronomy12051011

Cited by 14 publications

(6 citation statements)

References 28 publications

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“…The process of movement of carrot seeds in different regions of the pneumatic seed-metering device under the oscillatory state can be seen in Figure 3, the direction of arrow indicated the direction of seeds movement in the device. In order to ensure that carrot seeds were adsorbed by the pneumatic seed-metering device, and that the seeding plate rotated to complete the seeding work smoothly so as to match the effective negative pressure value at the air outlet, the critical negative pressure value was analyzed and calculated to ensure that it worked smoothly [18] . The main areas where carrot seeds were subjected to negative pressure forces in the seed drains were the filling, cleaning and carrying areas.…”

Section: Analysis Of the Movement State Of Seedsmentioning

confidence: 99%

Optimized design of the pneumatic precision seed-metering device for carrots

Feng,

Sun,

et al. 2023

International Journal of Agricultural and Biological Engineering

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The small size, light weight, irregular shape, and impurities that characterize seed groups increase clogging tendencies in the traditional seed-metering device thereby making it difficult to achieve high-speed precision seeding. A pneumatic seed-metering device with good seed-filling performance for carrot was designed in this study. By analyzing the movement state of seeds in the device under the theoretical condition, it was concluded that the minimum critical negative pressure value of air chamber was 0.32 kPa, which provided a theoretical basis for simulation and testing. ANSYS 17.0 Software was used to simulate the shape of the seeding plate hole. By comparing the pressure, air flow stability between the suction surface and the plug removal surface of the convection field, it was concluded that the conical hole was optimal. A bench verification test was conducted on the device. The average qualified rate, missing rate, and replaying rate were 81.48%, 4.07%, and 14.45%, respectively, which provided a strong reference for the design of carrot precision seed-metering device.

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Section: Analysis Of the Movement State Of Seedsmentioning

confidence: 99%

Optimized design of the pneumatic precision seed-metering device for carrots

Feng,

Sun,

et al. 2023

International Journal of Agricultural and Biological Engineering

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“…To improve the sowing efficiency and quality of small cabbages, mechanized sowing is necessary. A pneumatic precision seeder is the core component to achieve mechanized sowing at present, and its structural parameters and working parameters will directly affect the precision and accuracy of sowing [5,6].…”

Section: Introductionmentioning

confidence: 99%

Analysis and Evaluation of Seed-Filling Performance of a Pneumatic Interference Precision Seeder for Small Cabbages

Liu,

Su,

et al. 2024

Applied Sciences

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To address the current problems of poor seed-filling performance and seed leakage of the pneumatic seed filler for cabbage, we designed a pneumatic disturbing precision seed filler for cabbage based on the auxiliary disturbing seed-filling method. This seeder can completely perturb the seed population entering the bottom of the seed box casing during the seed-filling process, thereby increasing the initial velocity of the cabbage seeds, and facilitating the smooth progress of the seed-filling process. Firstly, we carried out a theoretical analysis based on the particle dynamics of the seed-filling process of the seeder and obtained the influencing factors affecting the seed-filling performance of the seeder. Secondly, through EDEM discrete element simulation, the average speed of the seed population, the disturbance frequency, and the degree of disturbance were used as the indicators to select the seed discharge disk structure with the best seed-filling performance. In the experimental aspect, a four-factor three-level orthogonal standardized test was conducted to evaluate the seed filling performance of the planter, using the seed suction qualification rate and the seed leakage rate as the evaluation indexes. The optimal structure of the seed discharge tray was selected through polarity analysis and ANOVA. The optimal combination of parameters for the seed-filling process of the planter was obtained; linear serrated disk, 40 rpm disk rotation speed, −2500 Pa negative fan pressure, and 1.2 mm aperture diameter. After comparative validation tests, the seed suction qualification rate of the seed absorber was 95.32%, and the leakage rate was 3.11%, which was in line with the agronomic planting of Chinese cabbage seeds.

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“…Compared with the traditional air suction metering device and mechanical seed-metering device [7,8], there is a certain degree of enhancement, which can control the range of seed extraction in a small range. However, there still exist the problems of suction hole adsorption of multiple seeds, plugging holes, difficulty in clearing the seeds, etc., which impede the further development of precision seeding [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Design and Experiment of Precision Seed Metering Device for Flow Adsorption of Quinoa Seeds

Zhong,

Zhao,

Liu

et al. 2024

Agriculture

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This paper proposes a solution to the problem of tight population in the filling area of traditional air suction seed metering devices during quinoa sowing, which leads to inaccurate adsorption. The proposed method disperses the population into a stable seed flow and absorbs the seeds in a flow posture. The flow adsorption precision seed metering device is designed and improved, and the key structure parameters are optimized based on the shape and size parameters of quinoa seeds. A four-factor and three-level response surface orthogonal test is conducted using the Box–Behnken experimental design. The number of seeds, flow angle, negative pressure at the suction hole, and advancing speed are taken as experimental factors, and the qualified index of grain number per hole, qualified index of hole distance, and coefficient of variation of hole distance are used as evaluation indices. The results are optimized using extreme value theory, and it is found that when the seed amount is 5.82 mm, the flow angle is 31.08°, the negative pressure of the air chamber is 1.7 kPa, and the advancing speed is 3.82 km·h−1, and the qualified index of hole number is 94.37%, the qualified index of hole distance is 95.39%, and the coefficient of variation of hole distance is 4.51%. The results are in general agreement with the prediction through the bench validation test, which meets the requirements of quinoa seed metering devices.

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Performance Parameters Optimization of a Three-Row Pneumatic Precision Metering Device for Brassica chinensis

Cited by 14 publications

References 28 publications

Optimized design of the pneumatic precision seed-metering device for carrots

Optimized design of the pneumatic precision seed-metering device for carrots

Analysis and Evaluation of Seed-Filling Performance of a Pneumatic Interference Precision Seeder for Small Cabbages

Design and Experiment of Precision Seed Metering Device for Flow Adsorption of Quinoa Seeds

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