Perspectives of grain pile separation before it enters  the thresh-ER

Ozherelyev, Viktor; Nikitin, V. V.; Belous, N. P.; Torikov, Vladimir

doi:10.14419/ijet.v7i2.13.11622

Cited by 5 publications

(3 citation statements)

References 2 publications

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“…Есть вариант, в котором для этой цели используется дополнительный скребковый транспортер [21; 22]. В качестве альтернативы указанному транспортеру могут служить наклонные шнеки [23][24][25].…”

Section: технологии машины и оборудованиеunclassified

Influence of the Grid Inclination Angle on the Efficiency of Preliminary Separation of the Combed Heap

Nikitin,

Ozherelev

2024

Engineering Technologies and Systems

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Introduction. A highly topical scientific and practical task is to justify the choice of the most advanced variant of the device for pre-separating the combed heap and to optimize its design. Aim of the Study. The study is aimed at testing the effect of the grid inclination angle on the effectiveness of pre-separating the combed heap. Materials and Methods. It is possible to minimize the separated grain flow into the threshing machine either by means of a feeder house grid bottom or by means of a horizontal separating device, located directly in front of the threshing drum. To select the optimal design of the separation device, there was planned and conducted a laboratory experiment. The study was carried out in two stages. In the first series of experiments, the elevator body was installed horizontally, and in the second series – at an angle of 45° to the horizon. The width of the grid bottom openings had four variations (6, 8, 10 and 12 mm), and the speed of the scraper conveyor was 3 m/s. A combed heap of the winter wheat variety Moskovskaya 56 was selected as the study object. The grain moisture was 12%. Results.According to the results of laboratory studies, it was found that with an increase in the width of the grid surface openings, the intensity of separating grain increases. The maximum device throughput (90%) corresponds to the horizontal position of the grid bottom of the experimental installation and the width of the openings b = 12 mm. Extrapolation of the separated grain decreasing graph indicates that to ensure complete separation of grain, the length of the separating grid should be at least L = 0.9 m. Discussion and Conclusion. The use of a horizontal separating grid allows increasing the device separation efficiency and reducing its metal content by 14–16%.

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Section: технологии машины и оборудованиеunclassified

Influence of the Grid Inclination Angle on the Efficiency of Preliminary Separation of the Combed Heap

Nikitin,

Ozherelev

2024

Engineering Technologies and Systems

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“…Широкое внедрение технологии очеса сдерживается, во-первых, незавершенностью оптимизационных работ по конструкции очесывателей [10][11][12]. Вовторых, конструкция молотилки зерноуборочных комбайнов не приспособлена к приему и обработке очесанного зернового вороха, поскольку в молотильный зазор поступает 80 и более процентов свободного зерна, которое подвергается ударному воздействию, вследствие чего резко возрастает доля дробленой продукции [13][14][15]. Кроме того, на это негативное технологическое воздействие расходуется значительная часть мощности, потребляемой барабаном [16; 17].…”

Section: Introductionunclassified

“…Обзор литературы В первую очередь целесообразно зафиксировать состав очесанного зернового вороха, с которым предстоит работать молотилке зерноуборочного комбайна. По данным разных авторов, содержание в нем свободного зерна (по массе) варьируется в пределах от 60 до 85 %, оборванных колосков 10-25 % и соломистых компонентов от 7 до 25 % [15]. С ростом частоты вращения ротора можно увеличить долю свободного зерна в ворохе, но при этом возрастает и степень его дробления [14].…”

Section: Introductionunclassified

The Results of the Combine Design Adaptation to Work with a Stripper Header

Ozherelev

Nikitin

2022

Engineering Technologies and Systems

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Introduction. A decrease of damaging loose grains by threshing tools when combing standing plants is an urgent scientific problem. The aim of the research is to develop a technical solution and experimentally confirm the possibility of loose grains pre-separation from the stripped grain heap before it enters the threshing chamber of the combine harvester. Materials and Methods. The most promising technical solution to minimize the damaging of loose grain is an inclined chamber containing an oblong-hole lattice bottom, under which inclined augers are mounted. The experimental studies had two stages. In the first series of experiments, in laboratory conditions there were determined the optimal sizes of the lattice bottom holes to ensure the maximum passage of loose grains. In the second series of experiments, the degrees of separating and damaging loose grains were evaluated in real field conditions. Results. According to the results of laboratory studies, it was found that the maximum passage of loose grains through the holes of the lattice bottom is 68.7% with the width of holes 8 mm and their length 160 mm. According to the results of field experiments, it was found that the average passage of loose grains through the holes of the lattice bottom is 90%. At the same time, damaging grains in the inclined chamber did not exceed 0.5%, and in the hopper 1.75%. Damaging grains in the bunker was in the range of 5.25% when the combine operated without pre-separation of the combed grain heap on the lattice bottom of the inclined chamber. Discussion and Conclusion. Pre-separation of loose grains from the combed heap makes it possible to reduce damaging grains at least three times, and also reduces the power consumed by the drive of the threshing machine by 11–12%.

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Comparison of Different Methods for Preliminary Separation of Free Grain When Hatcheling Standing Plants

Ozherelyev¹,

Nikitin²,

Komogortsev³

2021

IOP Conf. Ser.: Mater. Sci. Eng.

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The article presents the results of laboratory studies, confirming the possibility of preliminary separation of free grain from the hatchelled grain heap before it enters the combine harvester threshing chamber. It has been established that the most promising methods for performing this technological process are a mesh conveyor mounted in front of the thresher and an inclined chamber equipped with a grating bottom with oblong holes. The experimental results indicate that the maximum passage of free grain through the openings of the mesh conveyor 2000 mm long is 94.66%, and for an inclined chamber with a grating bottom 950 mm long – 68.7%. To ensure the passage of 99% free grain, the length of the mesh conveyor separating surface should be at least 2.69 m, and the length of the inclined chamber should be 1.17 m. The practical implementation of the first separation method requires shifting the threshing drum back and drastically shortening the straw walker. The second method of separation is more acceptable, since it does not require a substantial rearrangement of the serial harvester.

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Perspectives of grain pile separation before it enters the thresh-ER

Cited by 5 publications

References 2 publications

Influence of the Grid Inclination Angle on the Efficiency of Preliminary Separation of the Combed Heap

Influence of the Grid Inclination Angle on the Efficiency of Preliminary Separation of the Combed Heap

The Results of the Combine Design Adaptation to Work with a Stripper Header

Comparison of Different Methods for Preliminary Separation of Free Grain When Hatcheling Standing Plants

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