Investigation of the burial and mixing performance of a rotary tiller using discrete element method

Du, Jun; Heng, Yifan; Zheng, Kan; Luo, Chengming; Zhu, Yao; Zhang, Jumin; Xia, Junfang

doi:10.1016/j.still.2022.105349

Cited by 30 publications

(12 citation statements)

References 39 publications

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“…al. 30 also reported that increased tillage depth improved the burial performance of rotary tiller blades.…”

Section: Discussionmentioning

confidence: 93%

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Effect of Geometrical and Operational Parameters on Performance Dynamics of Modified Rotary Blades: A DEM-Based Investigation

Nalawade,

Singh,

Roul

et al. 2024

Preprint

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The geometric features and operational parameters of rotary blades on rotary tillers significantly impact their performance characteristics. The sweepback angle is a geometric feature of the 'L'-shaped rotary blade that has remained unexplored in previous studies. This study aimed to analyze the effect of geometrical and operational parameters on the performance dynamics of the 'L'-shaped rotary blade. The investigation was conducted using the discrete element method (DEM) and further validated through experiments conducted in a soil bin. The simulation experiment was conducted by dividing the particle bed into horizontal particle zones. The effect of the geometrical (sweepback angle) and operational parameters (forward speed, rotational speed and depth) on the power requirement, disturbance intensity and mixing index was studied. The novel method was adopted to determine the mixing capability of rotary blades in terms of sub-domain mixing index (SMI) and overall mixing index (OMI). The results revealed that the power requirements for a sweepback angle of 18° were 26.39% and 16.50% lower than those for sweepback angles of 6° and 12°, respectively. The sweepback angle tends to have the least effect on the overall mixing index compared to operational parameters. The average particle velocity decreased by 22.19 and 29.60% with sweepback angles of 12 and 18°, respectively, compared to the sweepback angle of 6°. The relative error during the experiment varied between 1.29 and 13.51%. It was concluded that the sweepback angle was found to be a feasible option for reducing the power requirement with the minimum impact on the overall performance.

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“…al. 30 also reported that increased tillage depth improved the burial performance of rotary tiller blades.…”

Section: Discussionmentioning

confidence: 93%

“…al. 30 reported contradictory results in which they found that disturbance intensity tends to decrease with an increase in forward velocity. However, it is important to note that they focused on spiral horizontal blades and J-shaped rotary blades, while the current study focused on L-shaped blades.…”

Section: Discussionmentioning

confidence: 98%

Effect of Geometrical and Operational Parameters on Performance Dynamics of Modified Rotary Blades: A DEM-Based Investigation

Nalawade,

Singh,

Roul

et al. 2024

Preprint

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“…The soil layer mixing is shown as Figure 15 [4]. Du, J. compared and optimized the tillage depth, forward speed and rotation speed according to soil burial and mixing performance, so as to enhance the mixing and disturbance performance of the rotary tiller for different soil layers [59]. In order to reduce the horizontal resistance and soil disturbance of the multi-purpose mechanical loosening shovel in the improvement of perennial alfalfa fields, a new bionic loosening shovel was designed based on the anteater's claw toe.…”

Section: Mixing Of Soil Layersmentioning

confidence: 99%

Review of the Research on Soil Disturbance by Tools

et al. 2022

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The discrete element method can be used to analyze the interaction between tools and soil. It can be used to guide the optimal design of tools, but the appropriate simulation and test method selected is important to achieve the goal. This paper mainly introduces the disturbance of soil by tillage tools. The disturbance of the soil by tools include soil loosening, soil movement, and soil mixing. The disturbance contour is used to visually display the disturbance results, and the cross-sectional area, lateral soil throwing amount, ditch ridge height, ditch width, and ditch backfill are used to characterize the cross-sectional shape. Tracers are usually used to track soil particles to visually display the particle movement path during disturbance; this can be used to study the soil disturbance trend by the tools. When parameters and models are appropriate, the movement and contact of microscopic soil particles can be accurately simulated. By comparing the particle behavior of simulation and experiment, the contact model and contact parameters can be verified. The method introduced provides a reference for the optimal design of the tools and the research of disturbance by the tools.

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“…1 . This study is supported by lots of rotary cultivator theories 14 – 16 , so it is easy to implement, and also it is expected to be the key to solving this issue in the future. However, relevant studies have not constructed a theoretical model for paddy field blade mud-throwing operation, and the working result of the original paddy field blade is not ideal.…”

Section: Introductionmentioning

confidence: 96%

Structure parameter design and bench test research of paddy field blades

Chen

et al. 2022

Sci Rep

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Aiming at the problems of high labor intensity and low efficiency in manual operation during the pulping process of rice seedling nursing in thin mud in hilly and mountain areas, this paper designed a new type of paddy field blade for seedling nursing, and utilized a rice nursery pulper to help manual operation complete the pulping process. It created a mathematical model of mud-throwing mass and operating power in the operation process of paddy field blade, and obtained the main structure factors that influenced the mud-throwing mass and operating power of paddy field blade, which included the area of mud splashing board, the angle between the front cutting edge and the mud splashing board, and the inclination angle between the front cutting surface and the mud splashing board. To further analyze the degree of influence of the blade’s main structure parameters on mud-throwing mass and operating power, it used EDEM discrete element simulation software to establish a discrete element simulation model of paddy field blade and mud particle system, performed simulation analysis with the method of orthogonal experimental design, and conducted a bench test for comparison. The results showed that: (1) the degree of influence of the three structure parameters on mud-throwing mass and operating power from large to small in order was the area of mud splashing board > the inclination angle between front cutting surface and mud splashing board > the angle between front cutting edge and mud splashing board; (2) the maximum relative error for mud-throwing mass between simulation analysis and bench test was 4.53%, and that for operating power was 8.67%; and (3) three reference parameters combinations were selected by P2-1/M2 graph, the mud-throwing mass of the three combinations was 40.43%, 27.52% and 0.16% higher than that of the original blade, and the power consumed was 13.99%, 21.83% and 36.65% lower than that of the original blade, indicating that the new paddy field blade had good operating performance.

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Investigation of the burial and mixing performance of a rotary tiller using discrete element method

Cited by 30 publications

References 39 publications

Effect of Geometrical and Operational Parameters on Performance Dynamics of Modified Rotary Blades: A DEM-Based Investigation

Effect of Geometrical and Operational Parameters on Performance Dynamics of Modified Rotary Blades: A DEM-Based Investigation

Review of the Research on Soil Disturbance by Tools

Structure parameter design and bench test research of paddy field blades

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