05. Savinykh P. A., Turubanov N. V., Aleshkin A. V., Suhlyaev V. A. The Effect of Air Pressure on the Technological Process of Grinding in the Grain Hammer Mill

DOI: 10.15507/2658-4123.035.202501.060-083

The Effect of Air Pressure on the Technological Process of Grinding in the Grain Hammer Mill

Petr A. Savinykh
Dr.Sci. (Eng.), Professor, Chief Researcher, Head of the Laboratory of Mechanization of Livestock Production, Federal Agrarian Scientific Center of the North-East named after N. V. Rudnitsky (166a Lenin St., Kirov 610007, Russian Federation), ORCID: https://orcid.org/0000-0003-0524-9721, Researcher ID: V-6933-2017, Scopus ID: 56728791200, SPIN-code: 5868-9317, This email address is being protected from spambots. You need JavaScript enabled to view it.

Nikolay V. Turubanov
Cand.Sci. (Eng.), Associate Professor, Senior Researcher, Federal Agrarian Scientific Center of the North-East named after N. V. Rudnitsky (166a Lenin St., Kirov 610007, Russian Federation), ORCID: https://orcid.org/0000-0002-1446-6851, Scopus ID: 57192554417, SPIN-code: 2628-1001, This email address is being protected from spambots. You need JavaScript enabled to view it.

Aleksey V. Aleshkin
Dr.Sci. (Eng.), Professor of the Department of Mechanics and Engineering Graphics, Vyatka State University (36 Moskovskaya St., Kirov 610000, Russian Federation), ORCID: https://orcid.org/0000-0002-6949-1480, Researcher ID: ABA-6228-2020, Scopus ID: 57190028500, SPIN-code: 5084-5478, This email address is being protected from spambots. You need JavaScript enabled to view it.

Vladimir A. Suhlyaev
Senior Lecturer in the Department of Technical Systems in Agribusiness, Vologda State Dairy Academy named after N. V. Vereshchagin (2 Schmidt St., Molochnoye, Vologda 160555, Russian Federation), ORCID: https://orcid.org/0009-0005-0218-2105, Researcher ID: KIH-9009-2024, SPIN-code: 2773-8480, This email address is being protected from spambots. You need JavaScript enabled to view it.

Abstract
Introduction. The main problem of the grain hammer mill is over-grinding of grain caused by untimely removal of the final product from the grinding chamber. A way to effect the air flow arrangement in the grain hammer mill is to change the air pressure around the grinding chamber. Therefore, the study of the effect of air pressure around the grain hammer mill on the quality and energy indicators of its operation is an urgent task today.
Aim of the Study. The study is aimed at determining the effect of air pressure around the grinding chamber on the air flow motion pattern in the grain hammer mill and its energy indicators.
Materials and Methods. For a theoretical study of the air flow circulation in the grinding chamber, there was constructed a geometric model of the rotor placed in the grinding chamber. The Reynolds averaged equations of a continuous medium motion was the basis for the mathematical model of air motion. The calculation results were used to construct the velocity fields for the air flow. To conduct experimental studies, there was designed a pressure chamber that allows changing the air pressure in the grain hammer mill.
Results. Based on the results of theoretical studies, it has been determined that the pres- sure decrease in the grinding chamber by 10 times reduces the power consumption by 112 watts. Experimental studies have shown that when the pressure in the grinding cham- ber decreases, the power consumed by the engine for all types of rotors decreases too. Also, an increase in air pressure in the grinding chamber leads to a change in the amount of grinded grain remains on the sieve to 0 mm: for the blade and hammer rotors, the amount of remains decreases, and for the hammer-blade rotor it increases
Discussion and Conclusion. The results of theoretical and experimental studies have shown that decreasing the air pressure around the grinding chamber can decrease the energy costs for the technological process and air flow motion inside the grinding chamber, and reduce the over-grinding of grain. The study results make it possible to design the grinding chambers for grain hammer mills taking into account the air flow motion.

Keywords: grain hammer mill, air flow, pressure chamber, velocity field, blade rotor, hammer rotor

Acknowledgments: The author expresses his gratitude to the anonymous reviewers whose objective comments contributed to the quality of the article.

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

For citation: Savinykh P.A., Turubanov N.V., Aleshkin A.V., Suhlyaev V.A. The Effect of Air Pressure on the Technological Process of Grinding in the Grain Hammer Mill. Engineering Technologies and Systems. 2025;35(1):60–83. https://doi.org/10.15507/2658-4123.035.202501.060-083

Authors contribution:
P. A. Savinykh – supervising and mentoring in planning and conducting the study; formulating the ideas, aims and objectives of the study. N. V. Turubanov – conducting the study including performing the experiments, collecting data and evidence; preparing and presenting the manuscript, visualizing the study data and findings.
A. V. Aleshkin – supervising and mentoring in planning and conducting the study; formulating the ideas, aims and objectives of the study; conducting the study including performing the experiments, collecting data and evidence.
V. A. Suhlyaev – using statistical, mathematical, computational formal techniques to analyze the study data; conducting the study including performing the experiments, collecting data and evidence.

All authors have read and approved the final manuscript.

Submitted 19.09.2024;
revised 04.10.2024;
accepted 11.10.2024

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