Bionic Design of a Potato Digging Shovel with Drag Reduction Based on the Discrete Element Method (DEM) in Clay Soil

Li, Junwei; Jiang, Xiaohu; Ma, Yan; Jin, Tao; Hu, Bin

doi:10.3390/app10207096

Cited by 13 publications

(17 citation statements)

References 25 publications

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“…The energy consumption during the operation is mainly composed of the forward movement energy consumption Q 1 , stubble breaking power consumption Q 2 and reciprocating deflection energy consumption Q 3 of deep loosening shovel, while the elastic potential energy stored in the elastic mechanism Q 4 can offset some of the energy consumption. Therefore, the operating energy consumption can be derived from Equation (13).…”

Section: Combined Operation Specific Fuel Consumptionmentioning

confidence: 99%

“…Equation (14) shows that reciprocating deflection distance Δ͡ L' of BSD is minimal. Equation (13) shows that the Q 3 value of the BSD is the lowest. The elastic system of the BSD is designed in series-parallel so that the equivalent elastic modulus of the elastic system remains constant, and the same deflection angle as the other two machines can be obtained at hinge ①, while a certain deflection angle will be produced at hinges ② and ( and ③ ① and ② ③ in the text corresponds to the criteria in Figure 5).…”

Section: Combined Operation Specific Fuel Consumptionmentioning

confidence: 99%

“…The Phaeozem region of northeast China is the most important commercial grain base in China [2] , which is known as the golden maize belt [3] . The unique climate and planting characteristics of this planting area have led to three major technical problems in the operation of existing stubble-deep loosening combined tillage machine in the maize planting areas [4,5] , i.e., 1) Low stubble breaking rate: The maize rhizomes in this planting area are strong and the moisture content is high, which makes the resistance of stubble breaking operation far greater than other areas [6] ; 2) Poor consistency of tilling depth in deep loosening operation: severe soil consolidation in this growing area is associated with a high level of straw cover [7][8][9][10] , which makes it difficult to guarantee the consistency of tilling depth [11,12] ; 3) High fuel consumption for stubble-deep loosening combined tillage machine: the soil in this planting area has strong cohesion and high adhesion [13] , and the amount of rootstock returned to the field is much larger than that in other areas, resulting in high energy consumption for combined operation [14] .…”

Section: Introductionmentioning

confidence: 99%

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Design and experiment of bionic stubble breaking-deep loosening combined tillage machine

Zhao

Guo

et al. 2021

International Journal of Agricultural and Biological Engineering

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Under the conditions of straw returning operation, there are three major technical bottlenecks in the Phaeozem region of northeast China, namely low stubble breaking rate, poor tillage depth consistency, and high fuel consumption. In this research, a bionic stubble-deep loosening combined tillage machine (BSD) was designed through bionic prototype analysis, coupled bionic analysis, coupled bionic design, theoretical analysis and application of intelligent control techniques. It consists of a bionic stubble breaking device and a bionic self-excited vibratory deep loosening device. Based on the unique biting pattern of locust mouthparts on maize rootstocks, the bionic stubble breaking device adopted a new multi-segment serrated bionic structure and a symmetrical rotational motion, which could significantly increase the stubble breaking rate (p<0.05) and reduce the resistance to stubble breaking operations (p<0.05). Based on the unique biology of the hare's paws, toes and nails, the bionic self-excited vibration deep loosening device adopted a new series-parallel composite bionic elastic system and an intelligent tilling depth control system with a fuzzy algorithm, which significantly improved the tilling depth consistency (p<0.05). The operational performance of the BSD was verified at different operating speeds through comparative experiments and reveals the mechanism of its excellent performance through theoretical analysis. The final experiment results showed that, at the same operating speed, the BSD improved the stubble breaking rate by 9.62% and 10.67%, reduced the stubble breaking torque by 28 N•m and 33 N•m, reduced the tillage depth coefficient of variation by 12.73% and 13.48%, and reduced the specific fuel consumption by 36 g/km•h and 40 g/km•h compared to the two most common models. The operating performance of the three kinds of machines will decrease with the increase of operating speed, and the BSD has the least decrease.

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Section: Combined Operation Specific Fuel Consumptionmentioning

confidence: 99%

Section: Combined Operation Specific Fuel Consumptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design and experiment of bionic stubble breaking-deep loosening combined tillage machine

Zhao

Guo

et al. 2021

International Journal of Agricultural and Biological Engineering

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“…In view of the potential advantages of biomimetics, researchers have also developed various biomimetic potato digging shovels with excellent draught force reduction or antiadhesion performance, such as a biomimetic convex dome shaped shovel [14], mole cricket inspired shovel [15], earthworm inspired shovel [16], wild boar inspired shovel [17], etc. In fact, the macroscopic shape, microscopic morphology and cutting edge of soil engaging components have a great effect on drought force [18].…”

Section: Introductionmentioning

confidence: 99%

3D Finite Element Simulation and Experimental Validation of a Mole Rat’s Digit Inspired Biomimetic Potato Digging Shovel

Wang

et al. 2022

Applied Sciences

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To reduce the draught force of a traditional planar potato digging shovel (DZ), a biomimetic potato digging shovel (YS), inspired by the mole rat’s digits, is designed, using the biomimetic macroscopic surface modification method. The finite element simulations, soil bin experiments, and field experiments for DZ and YS are conducted to explore the factors affecting draught force and to verify the feasibility and effectiveness of the biomimetic potato digging shovel. Results show that the soil–shovel interaction models predict the draught force well, but the simulations for the soil rupture distance ratio need to be further improved. The studied factors all have a great influence on the draught force of DZ and YS and they follow the order of cutting speed > digging depth > mounting angle. For the single shovels, YS, compared with DZ, increases the draught force at a low mounting angle but decreases the draught force by over 8.41% when the mounting angle is higher than 30°; for the grouped shovels, the draught force and fuel consumption of YS, compared with those of DZ, decline by over 13.33% and 9.18%, respectively. The reasons for the reduction in the draught force of YS are to make the soil mass tend to move upward and to change the soil’s state of motion and stress continually; thus, the compaction to the soil is reduced, and the soil becomes easier to be broken.

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“…This not only leads to increased subsoiling resistance, increased energy consumption, and poor subsoiling operation quality but also is easy to cause damage to machines and tools in severe conditions [15]. This problem can be solved by bionics, electroosmosis, and vibration methods [16][17][18]. The bionic and electro-osmosis approaches are highly dependent on the parameters such as soil type, moisture content, and soil firmness, although they can achieve resistance reduction [19,20].…”

Section: Introductionmentioning

confidence: 99%

Resistance and Consumption Reduction Mechanism of Bionic Vibration and Verification of Field Subsoiling Experiment

et al. 2021

Self Cite

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This study proposed a design method for forced-vibration subsoiling to reduce resistance and consumption. The vibration digging parameters of the Antlion larvae were obtained by high-speed camera, and a forced-vibration subsoiling shovel handle and six different shovel tips were designed by the non-smooth resistance-reducing surface design method. The resistance-reducing and consumption-reducing effects were verified in the field subsoiling experiment. The results showed that the resistance of subsoiling gradually decreased with the vibration frequency increasing. This vibration subsoiling method could not only reduce resistance but also reduce the total energy consumption, the resistance reduction rate reached 14.2–21.2%, and the total energy consumption was reduced by 11.2–16.5%. It could achieve the comprehensive subsoiling effect and create the soil conditions with the combination of loose and firmness. The non-smooth surface contributed to the reduction in resistance, and the forward speed had a more negligible effect on the resistance of subsoiling. The results had demonstrated that the combination of high-frequency vibration and non-smooth surfaces helped to reduce the cohesion of the soil, reduce the angle of internal friction in the soil, destroy the water film layer on the contact surface between the soil-touching components and the soil, change the soil flow state, and reduce the adhesion of the interface layer. The design method in this study could not only be applied to the design of vibration resistance reduction in the subsoiler but also had significance for the design of the other soil-contacting components.

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Bionic Design of a Potato Digging Shovel with Drag Reduction Based on the Discrete Element Method (DEM) in Clay Soil

Cited by 13 publications

References 25 publications

Design and experiment of bionic stubble breaking-deep loosening combined tillage machine

Design and experiment of bionic stubble breaking-deep loosening combined tillage machine

3D Finite Element Simulation and Experimental Validation of a Mole Rat’s Digit Inspired Biomimetic Potato Digging Shovel

Resistance and Consumption Reduction Mechanism of Bionic Vibration and Verification of Field Subsoiling Experiment

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