PDF To download article.

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.

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



1. Pyanov V.S. Organization of Motor Transport Operation in Conditions of Large-Commodity Grain Production. Tractors and Agricultural Machinery. 2010;(7):50‒51. EDN: OWWLYL

2. Astafyev V.L., Golikov V.A., Zhalnin E.V., Pavlov S.A., Pekhalskiy I.A. Strategy of Technical Support of Grain Harvesting Operations in Republic of Kazakhstan. AMA, Agricultural Mechanization in Asia, Africa and Latin America. 2020;51(3):46‒51. Available at: https://jglobal.jst.go.jp/en/detail?JGLOBAL_ID=202002246521566465 (accessed 23.06.2023).

3. Aldoshin N.V., Kravchenko I.N., Kuznetsov Yu.A., Kalashnikova L.V. New Working Element of Stripper Header “OZONˮ. INMATEH – Agricultural Engineering. 2018;55(2):71‒76. Available at: https://clck.ru/38ULes (accessed: 23.06.2023).

4. Ovchinnikov A.S., Lovchikov A.P., Ryadnov A.I., Fedorova O.A., Konstantinov M.M., Fomin S.D. On the Substantiation of the Technological Scheme of the Combine Harvester with the Stationary Process of Threshing Bread Mass. IOP Conference Series: Earth and Environmental Science. 2020;488(1):012057. https://doi.org/10.1088/1755-1315/488/1/012057

5. Glushkov I.N., Konstantinov M.M., Gerasimenko I.V., Ognev I.I., Gretsov A.S., Sarsymbayev S.A. Loading of Harvesters, Requirements for the Stems Grouped after Mowing and Impact Harvesting Equipment for Agricultural Landscapes as Prerequisites Development and Application of Batch Technology for Harvesting Grain Crops. Proceedings of the International Academy of Agrarian Education. 2021;(57):36‒41. EDN: DHHJUQ

6. Lovchikov A.P., Ognev I.I. Theoretical Background for the Development of Stationary Process of Grain Mass Threshing with a Combine Harvester. International Conference on Modern Trends in Manufacturing Technologies and Equipment. 2020;193:01004. https://doi.org/10.1051/e3sconf/202019301004

7. Konstantinov M., Glushkov I., Mukhamedov V., Lovchikov A. Increase in Soil Moisture Reserves Due to the Formation of High Stubble Residues for the Accumulation of Snow Precipitation. IOP Conference Series: Earth and Environmental Science. 2021;666(5):052049. https://doi.org/10.1088/1755-1315/666/5/052049

8. Buryanov A.I., Chervyakov I.V. Using Combines for Cleaning Grain Crops by Non-Traditional Technologies. INMATEH – Agricultural Engineering. 2019;59(3):27‒32. Available at: https://clck.ru/38UPX4 (accessed: 23.06.2023). (In Eng.)

9. Savin V.Yu. Dependence of the Degree of Wheat Grain Crushing on the Speed of the Comber. Voronezh State Agrarian University Bulletin. 2018;(3):98‒102. (In Russ.) https://doi.org/10.17238/issn2071-2243.2018.3.98

10. Alabushev A.V., Buryanov A.I., Pakhomov V.I., Kolinko A.A., Chervyakov I.V. Development of a Method to Control Threshing Process Based on Properties of Harvested Crop Variety and External Factors. IOP Conference Series: Earth and Environmental Science. 2020;422(3):012005. https://doi.org/10.1088/1755-1315/422/1/012005

11. Lachuga Yu.F., Bur’yanov A.I., Pakhomov V.I., Chervyakov I.V. Adaptation of Threshing Devices to Physical and Mechanical Characteristics of Harvested Crops. Russian Agricultural Sciences. 2020;46(2):198‒201. https://doi.org/10.3103/S1068367420020111

12. Chaplygin M.E., Tronev S.V., Davydova S.A. Soybean Harvesting Using Current Dedicated Headers and Adapters. IOP Conference Series: Earth and Environmental Science. 2021;659(1):012014. https://doi.org/10.1088/1755-1315/659/1/012014

13. Chaplygin M.E., Pekhalskiy I.A., Tronev S.V. The Choice of Combine Harvesters and Their Adapters for the Conditions of Northern Kazakhstan. AMA, Agricultural Mechanization in Asia, Africa and Latin America. 2020;51(3):74‒76. EDN: AHZGML

14. Savin V.Yu. Study of a Stripper Header for Grain Harvesting as a Vibrating System. Engineering Technologies and Systems. 2021;31(3):403‒413. (In Russ., abstract in Eng.) https://doi.org/10.15507/2658-4123.031.202103.403-413

15. Savin V.Yu. [Stripping Device]. Patent 2,726,110 Russian Federation. 2020 July 9. (In Russ.)

16. Savin V.Yu. [Stripping Device]. Patent 2,751,846 Russian Federation. 2021 July 19. 4 p. (In Russ.)

17. Ozherelev V.N., Nikitin V.V. The Results of the Combine Design Adap­tation to Work with a Stripper Header. Engineering Technologies and Systems. 2022;32(2):190‒206. (In Russ.) https://doi.org/10.15507/2658-4123.032.202202.190-206

18. Ozhereliev V.N., Nikitin V.V., Alakin V.M., Stanovov S.N. Study of the Parameters of a Combed Grain Heap. Technology in agriculture. 2013;(1):7‒9. (In Russ.) EDN: TZNNGD

19. Kukharev O.N., Semov I.N., Fedin M.A. [Removable Comb of Combing Equipment]. Patent 2,646,054 Russian Federation. 2018 March 1. 11 p. (In Russ.)

20. Ozhereliev V.N., Nikitin V.V., Sinyaya N.V., Chaplygin M.E., Fedina T.O. Combing the Standing Crops with Preliminary Separation of Loose Grains. Tractors and Agricultural Machinery. 2022;89(1):73–79. (In Russ.) https:doi.org/10.17816/0321-4443-100849

21. Dyemyentyev A.V., Skorik V.I., Pastukhov B.K. [Inclined Chamber of a Combine Harvester]. Patent 1,687,078 USSR. 1991 October 30. 5 p. (In Russ.)

22. Ozherelev V.N., Nikitin V.V. [Inclined Chamber of a Combine Harvester]. Patent 2,577,892 Russian Federation. 2016 March 20. 4 p. (In Russ.)

23. Ozherelyev V.N., Nikitin V.V., Belous N.M., Torikov V.V. Perspectives of Grain Pile Separation Before it Enters the Thresh-ER. International Journal of ngineering and Technology (UAE). 2018;7:114‒116. https://doi.org/10.14419/ijet.v7i2.13.11622

24. Ozherelyev V.N., Nikitin V.V., Komogortsev V.F. Comparison of Different Methods for Preliminary Separation of Free Grain When Hatcheling Standing Plants. In: IOP Conference Series: Materials Science and Engineering. International Science and Technology Conference. 2021;1079(6):062088. https://doi.org/10.1088/1757-899X/1079/6/062088

25. Ozherelev V.N., Nikitin V.V., Sinyaya N.V. [Inclined Chamber of a Combine Harvester]. Patent 2,725,729 Russian Federation. 2019 September 11. 7 p. (In Russ.)

26. Shabanov N.P., Khabrat N.I., Umerov E.D. [Combine Harvester]. Patent 2,680,666 Russian Federation. 2019 February 25. 4 p. (In Russ., abstract in Eng.)

27. Danchenko N.N., Shkinder V.N., Ablogin N.N., et al. [Combine Harvester for Standing Grain Crops]. Patent 1,766,310 USSR. 1992 October 7. 5 p. (In Russ.)

28. Ryadnov A.I., Fedorova O.A. [Grain Harvester with Stripper Header]. Patent 2,744,619 Russian Federation. 2021 March 12. 4 p. (In Russ., abstract in Eng.)

29. Ozherelev V.N., Nikitin V.V., Komogortsev V.F., Sinyaya N.V. To the Substantiation of the Method of Preliminary Separation of Free Grain in the Root of Plants. Science in the Central Russia. 2023;(1):77–84. (In Russ.) https://doi.org/10.35887/2305-2538-2023-1-77-84

30. Belous N.M., Belchenko S.A., Dronov A.V., Torikov V.E. Single- and Multispecies Farming Ecosystems in Field Forage Production. Natural Volatiles and Essential Oils. 2021;8(4):7745‒7764. EDN: HCGNUO

31. Tishaninov K.N. Justification of the Design and Technological Scheme Grating Mill. Science in the Central Russia. 2021;4:13‒17. (In Russ., abstract in Eng.) https://doi.org/10.35887/2305-2538-2021-4-13-17

32. Orobinsky V.I., Gievsky A.M., Gulevsky V.A., Baskakov I.V., Chernyshov A.V. Obtaining High-Quality Grain through the Use of Fractional Technology for Its Cleaning. IOP Conference Series: Earth and Environmental Science. 2021;640(2):022046. https://doi.org/10.1088/1755-1315/640/2/022046

33. Orobinsky V.I., Gulevsky V.A., Gievsky A.M. The Technological Process of the Grain Harvester as a Complex Functional System. IOP Conference Series: Earth and Environmental Science. Mechanization, Engineering, Technology, Innovation and Digital Technologies in Agriculture. 2021;723(3):032005. https://doi.org/10.1088/1755-1315/723/3/032005

34. Orobinsky V.I., Gulevsky V.A., Baskakov I.V., Podorvanov D.A. Ways to Reduce Injury to Seeds by the Harvester’s Final Threshing Device. IOP Conference Series: Earth and Environmental Science: Mechanization, Engineering, Technology, Innovation and Digital Technologies in Agriculture. 2021;723(3):032014. https://doi.org/10.1088/1755-1315/723/3/032014

35. Ozherelev V.N., Nikitin V.V. Grain Heap Separation at the Grates of a Combine Feederhouse. Agricultural Engineering. 2023;25(3):35‒40. (In Rus.) https://doi.org/10.26897/2687-1149-2023-3-35-40


Лицензия Creative Commons
This work is licensed under a Creative Commons Attribution 4.0 License.

Joomla templates by a4joomla