Improvement design of separation and conveying machinery and equipment of potato excavator in heavy soil

Li, Hongchang; Gao, Fang

doi:10.1016/j.pce.2023.103363

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…According to 2021 statistics, China's potato-planting area exceeded 4.63 million hectares, yielding over 90 million tons, which accounts for approximately one-fourth of the world's total potato planting area and production [4,5]. The continuous expansion of potato planting areas and the gradual increase in production have made the level of mechanized potato picking a crucial factor influencing both yield and quality [6][7][8]. Currently, potato-picking methods in China primarily include segmented picking and combined picking techniques [9].…”

Section: Introductionmentioning

confidence: 99%

Design and Experiment of Toggle Lever-Type Potato Picker

Lu,

Xie,

Gai

et al. 2024

Agriculture

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To address the issues of significant soil blockage and high potato damage rates in current potato picking machines, this study developed a toggle lever-type potato picker designed to minimize potato damage and improve operational efficiency. Design calculations were performed for the picker components, and kinematic analyses were conducted for the toggle lever. Single-factor experiments were carried out to determine the variation in performance parameters of the potato picker under different experimental conditions. Discrete element simulations were performed to measure the peak soil height before the pick-up shovel and the peak force on potatoes during the pick-up process. A Box–Behnken response surface experiment was conducted using toggle lever speed, machine forward speed, and shovel angle as experiments factors. Subsequently, an analysis of variance was performed, and a mathematical regression model was established based on the experiments results. The findings revealed that at a toggle lever speed of 50 r/min, machine forward speed of 0.9 m/s, and shovel angle of 19°; the potato leakage rate was 2.32%, and the potato damage rate was 2.72%, thereby meeting the requirements stipulated by potato mechanized picking technology regulations.

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Section: Introductionmentioning

confidence: 99%

Design and Experiment of Toggle Lever-Type Potato Picker

Lu,

Xie,

Gai

et al. 2024

Agriculture

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show abstract

“…This output represents roughly a quarter of the global potato planting area and production [4,5]. The ongoing expansion of the potato planting area and the progressive rise in production levels have underscored the critical importance of mechanized harvesting in influencing both the yield and quality of potatoes [6][7][8]. Presently, potato harvesting methods primarily encompass segmented harvesting and combined harvesting.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Breaking and Separating Characteristics of Potato–Soil Aggregates Based on the New Type of Swing Separation Sieve

Xie,

Zhang,

et al. 2024

Agronomy

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In response to the significant challenge posed by the trade-off between the efficiency of separating potato soil and minimizing potato peel damage in the 4SW-170 potato excavator, this study focused on enhancing the design of the swing separation sieve. The objective was to develop a novel separation sieve comprising three distinct orders of sieve surfaces. Building upon this foundation, the EDEM-Adams coupled simulation method was employed to explore the fragmentation and separation attributes of potato–soil aggregates. This investigation aimed to elucidate the behavior of potato–soil aggregates within the operational scope of the novel swing separation sieve. Subsequently, the optimized parameters were validated through field tests. The findings indicate a direct correlation between the fracture ratio of the cohesive bond and the crank speed, illustrating an increase in the former with higher crank speeds. Conversely, an inverse relationship exists between the fracture ratio and the sieve inclination angle, demonstrating a decrease in the ratio as the sieve inclination increases. At a machine speed of 1.9 km/h, the fracture ratio of the cohesive bond attains its peak value. The force exerted on potatoes at their maximum point escalates with rising crank speed but diminishes with increasing machine speed. Conversely, the effect of sieve inclination on the peak force applied to the potatoes is deemed inconsequential. The most effective parameter configuration for the separation sieve comprises a crank speed of 180 revolutions per minute (r/min), a machine speed of 1.9 km per hour (km/h), and a sieve inclination of 14.4°. Field trials have confirmed that the parameter combination yielded a potato detection rate of 98.01% and a mere 0.68% rate of potato skin breakage, meeting the stipulated technical specifications of the potato harvester.

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Design and Test of Discrete Element-Based Separation Roller Potato–Soil Separation Device

Du,

Liu,

Zhao

et al. 2024

Agriculture

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To address the problems of low bright rates and high rates of potato injuries, a left and right-hand rotation combination of potato–soil separation devices was developed. Its overall structure and working principle were introduced. A Texture Analyzer and pressure sensor were used to measure the force threshold of different varieties of potatoes. A discrete element model of separation rollers and potatoes was established. The collision characteristics of potatoes were analyzed using the device inclination angle, rotational speed, and the center distance of the separation rollers as test factors. A field trial was carried out to optimize the best combination of factors by taking the rate of injured potatoes, bright potatoes, and skin-breaking rate as the test indexes. The force threshold for skin-breaking injury in potatoes was found to be 190–195 N. When the inclination angle of the device was 6°, the rotation speed of the separation roller was 100 r/min, and the distance between the centers of the separation rollers was 79 mm. The rate of injury was 1.25%, the rate of bright potatoes was 99.01%, and the rate of skin-breaking was 1.58%. When the inclination angle of the device was 8°, the rotational speed of the separating roller was 80 r/min, and the center distance of the separating roller was 79 mm, the rate of injured potato was 1.43%, the rate of bright potato was 98.64%, and the rate of broken skin was 1.77%. This paper offers an optimized reference for the effectual removal of sticky soil.

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Improvement design of separation and conveying machinery and equipment of potato excavator in heavy soil

Cited by 5 publications

References 13 publications

Design and Experiment of Toggle Lever-Type Potato Picker

Design and Experiment of Toggle Lever-Type Potato Picker

Analysis of Breaking and Separating Characteristics of Potato–Soil Aggregates Based on the New Type of Swing Separation Sieve

Design and Test of Discrete Element-Based Separation Roller Potato–Soil Separation Device

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