Dynamic Indicators of a Corn Ear Threshing Process Influenced by the Threshing-Separation Unit Load

Kiniulis, Valdas; Steponavičius, Dainius; Kemzūraitė, Aurelija; Andriušis, Albinas; Juknevičius, Darius

doi:10.5755/j01.mech.4.24.20721

Cited by 11 publications

(5 citation statements)

References 19 publications

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“…Under these conditions: broken rate 1.67 % and impurity rate 1.03 %. { BR = minimize IR = minimize 350 < X 1 < 450 35 < X 2 < 45 6 < X 3 < 8 (7) To verify the reliability of the regression model, the results were averaged over three trials of the above optimal threshing operation parameters, and the test results showed that the mean value of the broken rate was 1.74% and the mean value of the impurity rate was 0.98%. The relative error with the predicted value is less than 5%, which indicates that the accuracy of the regression model is high.…”

Section: Verification Experimentsmentioning

confidence: 99%

Design and Experiment of Transverse Axial Flow Corn Flexible Threshing Device

Wang

et al. 2023

INMATEH

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In order to solve the problem of high broken rate and impurity rate in the direct harvesting of corn kernels in China, a flexible threshing element with variable stiffness consisting of a conical spring and rasp bar was developed on the basis of the existing horizontal axial-flow flow corn threshing cylinder structure to achieve low loss harvesting of corn kernels. Through mechanical analysis of the key components of the threshing element, its structure and operating parameters were determined. Then, orthogonal tests were carried out using the feed amount, threshing clearance and cylinder speed as the test factors, and the broken rate and impurity rate of the corn kernels as the test indicators. The results showed that the feed amount, threshing clearance and cylinder speed had a significant effect on the broken rate and impurity rate of corn kernels; the optimum parameters for the corn variable stiffness flexible threshing device were feed amount 6.1 kg•s−1, threshing clearance 40 mm and cylinder speed 392 r•min−1. The broken rate of corn kernels was 1.67% and impurity rate 1.03%. The test results fully met the requirements of the national standards for corn harvesting operations. This study provides a technical basis for the application of the axial flow corn flexible threshing device in the corn direct harvesting combine.

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Section: Verification Experimentsmentioning

confidence: 99%

Design and Experiment of Transverse Axial Flow Corn Flexible Threshing Device

Wang

et al. 2023

INMATEH

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“…Many researchers have discovered that the feeding rate has a linear correlation with grain loss, machine power consumption, and other parameters [52][53][54]. To explore the influence of the feeding rate on the threshing effect of corn, Kiniulis V. et al [55,56] first designed three different structure filling plates installed on the threshing cylinder, and the feeding rate varied from 4 kg•s −1 to 12 kg•s −1 . It was suggested that an increase in the feed rate caused the threshing loss to increase.…”

Section: Effect Of Feeding Rate On Corn Threshingmentioning

confidence: 99%

Low-Damage Corn Threshing Technology and Corn Threshing Devices: A Review of Recent Developments

Zhang

et al. 2023

Agriculture

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Corn is a crucial crop and has a vital application value in many aspects of our lives. Mechanical grain harvesting is the developing direction of corn harvesting technology, with corn threshing as its most imperative procedure. The quality of the threshing device of the corn harvester has a major influence on its damage rate, loss rate, and other parameters. Therefore, it is of great significance to effectively lower the damage rate in the process of corn threshing. This review presents the research progress and the application status of corn threshing technology and corn threshing machinery. The conclusions and suggestions on low-damage corn threshing technology and corn threshing machinery are summarized to provide a reference for the reduction in the damage rate of mechanical grain harvesting and promote the development of mechanical grain harvesting technology.

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“…It is assumed that when the ear contacts the threshing element, its velocity immediately changes and the impact behavior is random. If the ears pass through the area between the threshing cylinder and the concave at a constant velocity, then the times that threshing elements will impact on ears can be expressed as Equation (12).…”

Section: Model Of Rate Of Uncleared Grainmentioning

confidence: 99%

“…Li et al [10] designed a discrete roller model based on the discrete principle of rostrum bionic; the roller destroyed the arrangement rule of corn ears and loosened the corn grain, and the platform experiment indicated the optimal parameter combination. Kiniulis et al [11,12] studied the influence rules of threshing cylinder filler plates on the corn threshing process; cylinder rasp bars were designed and the test showed that the shape of spaces between rasp bars was related to ear threshing performance. Then, an influence model of working parameters on the corn feed rate during threshing was established, and test results showed that the force acting on the rear part of the concave tended to operate evenly at higher feed rates.…”

Section: Introductionmentioning

confidence: 99%

Design, Simulation, and Test of a New Threshing Cylinder for High Moisture Content Corn

Guo

et al. 2020

Applied Sciences

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Corn harvesting mode has gradually changed from ear harvesting to direct grain harvesting. In view of the problems of high moisture content in corn harvesting in China, such as the rates of broken grains (BGR) and uncleared grains (UGR) being too high, a new single longitudinal axial threshing cylinder was designed, which mainly included a cylinder spindle, a spiral feeding inlet, a T-type rasp bar, a separating straight rod, and a spiral extracting rod. Firstly, the three states of grain during the threshing process and the key influence factors of threshing and force analysis of corn ears in the threshing device were analyzed, then the structure of the threshing cylinder was designed, and its parameters were determined by theoretical analysis results. The arrangement mode of threshing elements adopted a combination of a T-type rasp bar, a separating straight rod, and a spiral extracting rod with a 6-head spiral pattern and an arrangement step of 250 mm. Secondly, the arrangement step of threshing elements was determined by discrete element method solution (DEM) simulation; the result showed that the average movement velocity was 55.04 m/s and the threshing time was 6–8 s. Finally, a multiple factors experiment of the threshing device was carried out, and the result showed that the order of the effect factors of the BGR and UGR was cylinder rotational speed > concave clearance > feed amount. When cylinder rotational speed was 309.17 r/min, concave clearance was 35.48 mm, and the feed amount was 6.13 kg/s. The verification experiment result showed that the BGR and UGR were 1.24% and 1.33%, respectively, which meet standard requirements. The research results could provide a reference for the design of a high moisture content grain threshing device and combine harvester.

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Dynamic Indicators of a Corn Ear Threshing Process Influenced by the Threshing-Separation Unit Load

Cited by 11 publications

References 19 publications

Design and Experiment of Transverse Axial Flow Corn Flexible Threshing Device

Design and Experiment of Transverse Axial Flow Corn Flexible Threshing Device

Low-Damage Corn Threshing Technology and Corn Threshing Devices: A Review of Recent Developments

Design, Simulation, and Test of a New Threshing Cylinder for High Moisture Content Corn

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