Parameter Optimization and Experiment of Slider-Hole-Wheel Seed-Metering Device Based on Discrete Element Method

Zhang, Xiaoshuang; Zhu, Dan; Xue, Kaiping; Li, Lanlan; Zhu, Jianjun; Zhang, Shun; Liao, Juan

doi:10.35633/inmateh-65-43

Cited by 22 publications

(6 citation statements)

References 13 publications

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“…Due to the difference in suitable seeding hole distance between super hybrid rice, hybrid rice and conventional rice, the distance is 180 mm, 150 mm and 140 mm respectively (Zhang et al, 2020). Therefore, the corresponding seeding speeds are 23.9 r/min, 28.7 r/min, and 30.8 r/min…”

Section: The Experimental Methodsmentioning

confidence: 99%

Design and Experiment of Combined Cavity-Type Precision Hole-Drop Seed-Metering Device for Rice

SONG,

WAN,

ZHOU

et al. 2023

INMATEH

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In order to solve the problems of unstable seeding quantity and poor applicability of traditional lightweight simplification mechanical seed-metering device, a combined cavity-type rice precision hole-drop seed-metering was developed. According to the material characteristics of rice seed and the requirements of seeding quantity, the innovative metering hole structure achieves the purpose of accurate filling of rice seed. In order to adapt to the demands of different rice seeds and improve the accuracy and convenience of the adjustment of the seeding quantity, the number of cavities involved in seeding operation was simply adjusted. Bench tests are carried out on the effects of the seed-inlet width, the metering hole slope angle, and the cavity outer angle on the precision seeding performance of the seed-metering device. The test results show that when the outer and middle seed-inlets width both are 3.8 mm, the innermost seed-inlet width is 5.4 mm, and the metering hole slope angle is 35 °, and the cavity outer angle is 85 °, the performance of the three kinds of rice was better. Opening outermost seed-inlet to seeding super hybrid rice, the qualified rate is 90.67%, the miss-seeding rate is 3.77%. Opening outer and middle seed-inlets to seeding hybrid rice, the qualified rate is 90.80%, the miss-seeding rate is 3.73%. Opening all three seed-inlets to seeding conventional rice, the qualified rate is 90.67%, the miss-seeding rate is 3.53%. The field test shows the seed-metering device can also meet the requires of these kinds of rice seeding.

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Section: The Experimental Methodsmentioning

confidence: 99%

Design and Experiment of Combined Cavity-Type Precision Hole-Drop Seed-Metering Device for Rice

SONG,

WAN,

ZHOU

et al. 2023

INMATEH

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“…As the hole seeder is a solid structure, it is impossible to observe the seeds' trajectory inside the hole seeder. The simulation of the model using EDEM provides a clear picture of the movement of the seeds inside the hole seeder and the speed of the seeds at any given position at any given time [32][33][34].…”

Section: Simulation Of the Hole Seeder And Analysis Of The Seed Dispe...mentioning

confidence: 99%

Simulation and Experimental Study of a Split High-Speed Precision Seeding System

Lü

et al. 2022

Agriculture

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According to the agronomic requirements of cotton precision seeding, the researchers designed a split seeding system to achieve high-speed precision seeding on the membrane. The 3D models used in the simulation process were created using Solidworks. They used the built-in Flow Simulation plug-in in SolidWorks to simulate the flow field in the drum and to grasp the air velocity and pressure changes. The CFD-DEM (computational fluid dynamics and discrete element method) coupling method was used to simulate the positive pressure airflow to transport the seeds, so as to grasp the movement of the seeds in the seed tube. EDEM (engineering discrete element modeling) was used to simulate the seeding process of the hole seeder, to understand the movement speed and trajectory of the seeds inside the hole seeder, and to analyze the reasons for missed seeding and reseeding. A three-factor, five-stage quadratic rotation orthogonal combination test was designed using Design-expert 13.0 software. This test evaluates the performance of a split seeding system by establishing a response surface for the seed rate, using the hole seeder speed, negative pressure, and hole diameter as test factors. The optimal parameter combination is obtained by optimizing the regression equation, which is further verified by bench tests. Under the hole seeding speed of 47.98 r/min, the negative pressure of 1.96 kPa and the hole diameter of 3.5 mm, the precision seeding system achieved a single seed rate of 90.9% and a missed seed rate of 4.3%. The verification test results are consistent with the optimization results, which meet the agronomic requirements of high-speed precision film seeding. This research provides a better technical solution for the application development of a precision seeder.

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“…In view of ensuring that mechanical seed-metering devices can complete seeding operations stably and accurately in the field, many researchers have conducted large amounts of in-depth research on mechanical seed-metering devices. Zhang et al [8] designed a slider-hole-wheel seed-metering device, studied the seed filling and removal process, analyzed the adverse effects of the rotation speed on seeding, and achieved high seeding accuracy. However, this study did not consider the potential damage caused by key components of the seed-metering device, such as the seed cleaning wheel, to the seeds.…”

Section: Introductionmentioning

confidence: 99%

Mechanism Analysis and Experimental Verification of Side-Filled Rice Precision Hole Direct Seed-Metering Device Based on MBD-DEM Simulations

Wang,

Yao,

et al. 2024

Agriculture

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In order to solve the problems of poor hole-filling performance and the high seed-breakage rate of conventional rice bud seed precision hole direct seed-metering devices, a side-filled rice precision hole direct seed-metering device was developed, and the mechanism and force analyses for seeding operations were carried out. The key factors affecting seeding quality were determined: rotation speed, seeding angle and seeding height. By coupling the discrete element method (DEM) and multi-rigid body dynamics (MBD), the seed breakage rate and seeding performance at different rotation speeds were analyzed. Single-factor bench testing was used to analyze the effect of a duckbill unit on seeding performance under different factor levels. The three-factor and five-level quadratic regression orthogonal rotation center combination test methods were used to obtain the optimal working parameter combination. The test results showed that when the rotation speed was 47 r/min, the seeding angle was 19°, and the seeding height was 180 mm, the qualified index of seeding was 92.03%, the hole diameter qualified index was 91.62%, and the hole distance variation index was 7.17%. This study provides a reference for the research of mechanical rice sprouting seed-metering devices.

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Parameter Optimization and Experiment of Slider-Hole-Wheel Seed-Metering Device Based on Discrete Element Method

Cited by 22 publications

References 13 publications

Design and Experiment of Combined Cavity-Type Precision Hole-Drop Seed-Metering Device for Rice

Design and Experiment of Combined Cavity-Type Precision Hole-Drop Seed-Metering Device for Rice

Simulation and Experimental Study of a Split High-Speed Precision Seeding System

Mechanism Analysis and Experimental Verification of Side-Filled Rice Precision Hole Direct Seed-Metering Device Based on MBD-DEM Simulations

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