DEM-MBD Coupling Simulation and Analysis of the Working Process of Soil and Tuber Separation of a Potato Combine Harvester

Li, Yuyao; Hu, Zhichao; Wang, Bing; Fan, Jiali; Yang, Hongguang; Wu, Feng

doi:10.3390/agronomy12081734

Cited by 16 publications

(14 citation statements)

References 13 publications

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“…For example, crops such as sweet potatoes, potatoes and carrots have very different fruit sizes, shapes and densities compared to peanut pods. Further evaluation is necessary to determine the suitability of current fruit-soil separating devices for fruit-soil separation conditions in these crops [22][23][24]. The evaluation includes whether there is a need to adjust the structure and operating parameters of the fruit-soil separating device and, if so, how to adjust them to suit the characteristics of different sub-soil crop fruits.…”

Section: Discussionmentioning

confidence: 99%

Design and Parameter Optimization of a Negative-Pressure Peanut Fruit-Soil Separating Device

Qin,

Jin,

Cao

et al. 2023

Agronomy

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This study proposes a negative-pressure fruit-soil separating device for peanuts cultivated in hilly and mountainous areas after combined harvesting, and the mechanism of the movement of the material in the process of material screening, fruit-soil separating, and pneumatic conveying of the device was analyzed. In addition, a four-factor, three-level Box-Behnken regression design test was used to explore the optimum operating parameters of the peanut fruit-soil separation device. The results showed that the best fruit-soil separation effect was achieved when the wind speed of the blower was 13.58 m/s, the height of the suction nozzle from the screen surface was 27 mm, the length of the suction port was 64 mm, and the feeding rate was 600 kg/h. Validation tests demonstrated that the impurity rate of 0.16% and the peanut pod loss rate of 0.2% exceeded the industry standard, indicating superior performance.

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Section: Discussionmentioning

confidence: 99%

Design and Parameter Optimization of a Negative-Pressure Peanut Fruit-Soil Separating Device

Qin,

Jin,

Cao

et al. 2023

Agronomy

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“…Shi et al [18] improved the design of a vertical cavity seeder based on the DEM-MBD coupling method and investigated the interference and anti-entry characteristics of cavity seeds in soil. Li et al [19] used DEM-MBD coupled simulation and experimental analysis to optimize the parameters related to the soil and tuber separation process in a potato harvester and validated the effectiveness of the simulation model through field tests and error calculations. Chen et al [20] developed a sweet potato ridge-forming machine with a plowshare structure and optimized the surface structure parameters of the plowshare through DEM-MBD coupled simulation, effectively reducing the cultivation resistance during machine operation.…”

Section: Rotary Tillage Ridge Machinerymentioning

confidence: 99%

Discrete Element Method–Multibody Dynamics Coupling Simulation and Experiment of Rotary Tillage and Ridging Process for Chili Pepper Cultivation

Yang,

Zhang,

Zhang

et al. 2024

Agronomy

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Rotary tillage, ridging, and mulching are commonly used cultivation methods for crops such as chili peppers, tomatoes, and strawberries in the arid regions of Northwest China. An integrated machine for rotary tillage, ridging, and mulching was designed by considering the growth characteristics of pepper root systems and the agronomic requirements of ridge beds. The structural parameters and their value ranges for key components such as the rotary tillage device and the ridging device were determined. By introducing the Bonding contact parameter, the soil cohesion between soil particles during the process of rotary tillage and ridging can be simulated. A coupled simulation model using the Discrete Element Method (DEM) and Multibody Dynamics (MBD) is established. The experimental factors selected were rotary tillage depth, ridging roller speed, and machine forward speed. The evaluation indexes were the traction resistance of the stemming roller and the soil compactness of the ridges. A response surface Box–Behnken Design test was carried out to obtain the best working parameters of the rotary tillage and ridging process for chili pepper cultivation as follows: the rotary tillage depth was 176 mm, the ridging roller speed was 283.71 r/min, and the machine forward speed was 0.55 m/s. Field experiments with optimal parameters showed that the ridge top width was 549.2 mm, the ridge bottom width was 750.5 mm, the ridge height was 222.9 mm, the ridge spacing was 1173.1 mm, the surface smoothness of the ridge was 12.3 mm, the width of soil covering the film edge was 76.3 mm, the stability coefficients of the ridge size parameters were all above 91.73%, and the soil compactness after operation was 60.82 KPa. All indicators meet the requirements for the rotary tillage and ridging cultivation of chili peppers in arid regions, providing reference for the design of rotary tillage and ridging mulching implements and the development of sustainable agriculture.

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“…At the end of the digging process, there is still some soil and other impurities attached to the tuber that need to be removed, using the sieving technology, in the second separation phase [49][50][51][52]. Sieve screen can have significant sieving effect on the second separation phase.…”

Section: Sieving Processmentioning

confidence: 99%

Development and Evaluation of Mechanical Harvesting of Root Crops and Its Performance Optimization

Gong¹,

Yang²

2023

Preprint

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Root crops grow in the soil deeply and bond with soil closely, which results in that the process of the separation between soil and root becomes the most difficult during the harvesting processes. In order to harvest root crops efficiently, the mechanical harvesting has become the main developing trend. However, high power and high damage rate are still occurred when mechanical harvester gets in touch with the roots. In this paper, we review the research of the development and evaluation of the mechanical harvesting of root crops and its performance optimization on the past years. The process of soil separation mainly consists in the initial separation between root and the ground and further separation between root and adhered soil. In general, the soil-cutting operation in the initial separation and the sieving mechanism in the further separation require high draught and power. And the dramatic friction, impact, pressure and so on, which happen in the components and soil-roots, are the key reasons to lead to root damage. The optimization of harvesting methods and parameters, including the digging shovel shape, working conditions, vibration, and screening way, is more significant in improving the harvesting performance. But there are still some limitations in the research and application of the mechanical harvester for root crops. Future research is suggested to focus on the development of the soil break-up when the digging shovel cutting soil, the insight into the interaction between soil and roots by different external compression loads, and the long-term studies to verify the high-efficiency and low-damage performances of mechanical harvester in practical application.

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DEM-MBD Coupling Simulation and Analysis of the Working Process of Soil and Tuber Separation of a Potato Combine Harvester

Cited by 16 publications

References 13 publications

Design and Parameter Optimization of a Negative-Pressure Peanut Fruit-Soil Separating Device

Design and Parameter Optimization of a Negative-Pressure Peanut Fruit-Soil Separating Device

Discrete Element Method–Multibody Dynamics Coupling Simulation and Experiment of Rotary Tillage and Ridging Process for Chili Pepper Cultivation

Development and Evaluation of Mechanical Harvesting of Root Crops and Its Performance Optimization

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