Analysis of the Separating Performance of a Card Cleaner for Pepper Harvester using EDEM Software

Byum, Jun–Hee; Nam, Ju–Seok; Choe, Jung Seob; Inoue, Eiji; Okayasu, Takashi; Kim, Dae–Cheol

doi:10.5109/1955404

Cited by 10 publications

(6 citation statements)

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“…The static friction coefficients of stem-stem, stem-leaf and stem-45 steel were measured by the inclined surface sliding method (Fangyuan et al, 2018). The self-made static friction coefficient measuring instrument mainly consists of a lifting plate and a digital display angle measuring instrument (Fig.…”

Section: Static Friction Coefficientmentioning

confidence: 99%

Parameter Measurement and Calibration in Discrete Element Simulation of Broken Sweet Potato Seedlings

Mu¹,

Qi²,

Zhang³

et al. 2021

American Journal of Biochemistry and Biotechnology

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Given the lack of accurate parameter values in discrete element simulation of sweet potato seedling mechanized recovery, a direct measurement and virtual calibration method was used to study the Discrete Element Method (DEM) simulation parameters of broken sweet potato stems and leaves. The intrinsic parameters, collision recovery coefficient and static friction coefficient of broken seedlings were acquired by physical experiments. Different parameter combinations were designed for DEM simulation. The intrinsic parameters of sweet potato leaves and other unmeasurable DEM simulation parameters were determined by stacking angle optimization simulation. Plackett-Burman test shows that the static friction coefficients of stem-stem and stem-steel and the rolling friction coefficients of stem-stem and stem-leaf all significantly influence the accumulation angle. The parameters that significantly influence the stacking angle of broken seedlings were sent to steepest ascent test and Box-Behnken test. The average stacking angle of 40.51° and the relative error of 0.972% indicate it feasible to calibrate DEM parameters by physical test and optimization simulation and the calibrated parameters can be used in DEM simulation of broken sweet potato stems and leaves.

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Section: Static Friction Coefficientmentioning

confidence: 99%

Parameter Measurement and Calibration in Discrete Element Simulation of Broken Sweet Potato Seedlings

Mu¹,

Qi²,

Zhang³

et al. 2021

American Journal of Biochemistry and Biotechnology

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“…DEM is used in the pharmaceutical, chemical, and food processing industries. It can simulate, analyze, and observe motion patterns of particle flows, and manage and store information on the mass velocity of each particle to clarify the forces acting on particles [7,8]. The mechanical plating process can be simulated by DEM.…”

Section: Introductionmentioning

confidence: 99%

Influence of rotational speed on the collision of mechanically plated galvanized layers based on discrete element method

Hao¹,

Wang²,

Wang³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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A discrete-element numerical simulation method was used to investigate the effect of plating barrel speed on the density of the galvanized layer during mechanical galvanizing. The motion behavior between the impact medium and the substrate in the plating barrel at five rotational speeds (20, 30, 40, 50, 60 rpm) was investigated. Laws of collision and contact force variation between the substrate and the impact medium were obtained. The average thickness, relative density, and average deviation of thickness of the galvanized layer specimens were obtained at the same rotational speed. The results were compared with those obtained from the simulation. The increase in barrel rotational speed decreased the number of contacts between the impact medium and the substrate, but made the change in the number of collisions more regular. This was conducive to a regular force on the zinc powder particles and made the galvanized layer more uniform and dense. The contact force between the impact medium and the substrate increased with an increase in barrel speed. At 20 rpm, the impact medium could not provide enough contact force to melt the zinc powder particles into the substrate surface. Contact force increased abnormally at 60 rpm, which caused some of the zinc powder particles that were attached to the surface of the substrate to fall off, which affected the plating thickening. The average thickness, relative density, and average deviation of the galvanized layer in the comparison test were consistent with the simulation results. From 30 to 50 rpm, the relative density of the galvanized layer increased with an increase in speed. The average thickness and relative density of the obtained galvanized layer were highest and the average deviation of the thickness was lowest at a barrel speed of 50 rpm. The relative density and uniformity of the galvanized layers were optimized.

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“…So far, the above two types of sweet potato vine harvesters have not been marketized. In recent years, the discrete element method and its simulation software, EDEM, have been widely studied and applied in the field of agricultural machinery [10][11][12][13]. The discrete element method has been applied to simulate the harvesting process of sweet potato vines in order to obtain the main parameters for the key devices of sweet potato vine harvesters with the aim of improving research and developing efficiency.…”

Section: Introductionmentioning

confidence: 99%

Design and Experiment with a Double-Roller Sweet Potato Vine Harvester

Wang

Zhang

et al. 2022

Agriculture

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The yield of sweet potato vines is large, making it a good source of food. However, it is difficult to harvest sweet potato vines due to creeping and intertwining. Therefore, according to the domestic sweet potato planting model, this paper designed a double roll sweet potato vine harvester which can complete the operations of vine picking, vine killing, conveying and header harvesting at one time. The machine adopts the process of front roll vine picking, rear roll vine killing and rod bar lifting. The key components of the vine picking device, vine killing device and lifting device were designed and calculated. A numerical simulation test of the vine harvesting process was carried out by using the discrete element numerical simulation method. It was determined that the length of the vine picking rod from the outside to the inside is 175 mm, 150 mm and 105 mm, respectively, and the inclination angle of the end is 160°. There are six vine killing knives on each vine killing knife plate. The inclination of the lifting device is 50°and the conveying speed is 3 m/s. Using the box Behnken experimental design method, taking the vine picking roller speed, vine killing roller speed and ground clearance as the experimental factors, and taking the sweet potato vine harvest rate, stubble height and potato injury rate as the evaluation indexes, a quadratic regression orthogonal test was carried out, the effects of various factors on the evaluation indexes were analyzed, and the experimental factors were optimized and verified. The experimental results showed that the optimal parameter combination is as follows: the rotation speed of vine picking roller should be 716 r/min, the rotation speed of vine killing roller should be 1960 r/min and the ground clearance should be 16 mm. With these parameters, the harvest rate of sweet potato vines is 93.1%, the stubble height is 29.5 mm and the potato injury rate is 0.174%. As such, the harvester meets the requirements for the mechanized harvesting of sweet potato vines and is of great significance as a light and simplified product for the sweet potato industry.

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Analysis of the Separating Performance of a Card Cleaner for Pepper Harvester using EDEM Software

Cited by 10 publications

References 0 publications

Parameter Measurement and Calibration in Discrete Element Simulation of Broken Sweet Potato Seedlings

Parameter Measurement and Calibration in Discrete Element Simulation of Broken Sweet Potato Seedlings

Influence of rotational speed on the collision of mechanically plated galvanized layers based on discrete element method

Design and Experiment with a Double-Roller Sweet Potato Vine Harvester

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