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DOI: 10.15507/2658-4123.034.202401.026-043

 

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

 

Viktor V. Nikitin
Dr.Sci. (Engr.), Head of the Technical Service Chair, Bryansk State Agrarian University (2a Sovetskaya St., Bryansk Oblast, Kokino 243365, Russian Federation), ORCID: https://orcid.org/0000-0003-1393-2731, Researcher ID: AAD-7368-2022, This email address is being protected from spambots. You need JavaScript enabled to view it.

Viktor N. Ozherelev
Dr.Sci. (Agric.), Professor of the Chair of Technical Systems in Agribusiness, Environmental Management and Road Construction, Bryansk State Agrarian University (2a Sovetskaya St., Bryansk Oblast, Kokino 243365, Russian Federation), ORCID: https://orcid.org/0000-0002-2121-3481, Researcher ID: AAD-8298-2022, This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract
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%.

Keywords: combine harvester, combing of standing crops, separated grain, preliminary separation, separating grid

Conflict of interest: The authors declare no conflict of interest.

Acknowledgements: The authors express their gratitude to anonymous reviewers, whose objective comments contributed to improving the quality of the article.

For citation: Nikitin V.V., Ozherelev V.N. Influence of the Grid Inclination Angle on the Efficiency of Preliminary Separation of the Combed Heap. Engineering Technologies and Systems. 2024;34(1):26‒43. https://doi.org/10.15507/2658-4123.034.202401.026-043

Authors contribution:
V. V. Nikitin – analyzing literary data, preparing the original version of the text and finalizing the text, conducting experiments and processing their results.
V. N. Ozherelev – scientific guidance, formulating the basic concept of research, general management of experimental research, conducting a critical analysis of the results and formulating conclusions.

All authors have read and approved the final manuscript.

Submitted 29.06.2023; revised 01.10.2023;
accepted 15.10.2023

 

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