Issue №: 2(121)
The journal deals with the problems of vibration technologies and machines, mathematical methods of vibration process studies, information on design and technological development, presents teaching and methodological aspects of teaching in the Higher School of Applied Sciences, where vibration machines and technologies are studied.
JUSTIFICATION OF THE GEOMETRY AND TRIBOTECHNICAL CHARACTERISTICS OF THE WORKING CHAMBER OF PUMPING SYSTEMS
Polievoda Yurii – Candidate of Technical Sciences, Associate Professor, Associate Professor of the Department of Bioengineering, Bio- and Food Technologies Faculty of Production Technology, Processing and Robotics in Animal Husbandry of the Vinnytsia National Agrarian University (Sonyachna St., 3, Vinnytsia, 21008, Ukraine, e-mail: vinyura36@gmail.com, https://orcid.org/0000-0002-2485-0611).
Symonik Bogdan – recipient of a Doctor of Philosophy degree in specialty 181 Food Technologies of the Vinnytsia National Agrarian University (Sonyachna St., 3, Vinnytsia, 21008, Ukraine, e-mail: symonikbohdan@ukr.net, https://orcid.org/0009-0004-4864-9711).
The article considers the scientific and applied aspects of substantiating the geometric and tribotechnical parameters of the working chamber of screw pumping systems designed for the transportation and forming of minced meat with different rheological properties. The relevance of the research is driven by the need to improve the energy efficiency of food raw material processing while ensuring the preservation of the structural and mechanical characteristics of the product's protein matrix.
The paper analyzes the influence of contact interaction between the minced meat and the surfaces of the screw and the working chamber, in particular the ratio of friction coefficients, on the formation of a stable transport flow. It has been established that the determining factor of efficient pumping is the provision of frictional asymmetry, which prevents the phenomenon of wall slip and ballast rotation of the product. To increase the traction capacity of the chamber, it is proposed to modify its inner surface by forming longitudinal grooves, which promote the transition from external friction “product–metal” to internal shear «product-product».
The expediency of using a confuser (conical) geometry in the pre-die zone of the working chamber is substantiated, which ensures a gradual increase in pressure, sealing of the working space, and reduction of backflows of minced meat through the radial clearance. It is proven that the geometric transformation of the channel contributes to the stabilization of the velocity field and the reduction of hydraulic losses.
A mathematical model of the process of transporting a viscoelastic medium has been developed. The regularities of the influence of the radial clearance, velocity parameters, and rheological characteristics of the raw material on the intensity of energy dissipation and the thermal regime of the process have been established. It is shown that excessive reduction of the clearance leads to local overheating and degradation of protein structures, while its optimization allows minimizing energy losses.
The conducted kinematic analysis made it possible to determine the relationships describing the mode of minced meat transportation, in particular the ratio of velocities and the conditions of flow continuity. Differences in the behavior of minced meat of various rheological groups and their influence on the design parameters of screw systems have been established.
The proposed approaches can be used in the design and modernization of food industry equipment.
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About the journal
The journal "Vibrations in Engineering and Technologies" is included in the list of technical scientific publications of Ukraine
(Category "B", Order of the Ministry of Education and Science of Ukraine dated July 2, 2020 No. 886)
Old version of the site: http://vibrojournal.vsau.edu.ua/
The journal "Vibrations in Engineering and Technology" is indexed by the following databases and catalogs:
The certificateof massmedia State registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University
The journal is devoted to highlighting current issues in engineering, mechanical engineering, and technological processes, including the study of dynamic and oscillatory phenomena in technical systems, the application of mathematical methods for process modeling and analysis, as well as the presentation of results of design-engineering and technological developments. Particular attention is given to the study of vibration processes and their application in modern technologies.
The purpose of the scientific journal “Vibrations in Engineering and Technologies” is to disseminate the results of fundamental and applied research in the field of engineering sciences aimed at developing theoretical foundations and practical approaches to the design, analysis, and improvement of machines, materials, and technological processes, including the use of vibration and oscillatory effects in various sectors of production.
The publication is focused on the formation of a modern scientific and informational environment for the effective exchange of research results, support of innovative development, and implementation of advanced technical solutions in industry, agro-industrial production, and related fields.
The journal promotes the development of interdisciplinary research, the integration of modern engineering approaches, and the enhancement of the efficiency of technological processes and technical systems, including through the rational use of vibration phenomena.
Objectives of the Scientific Journal
To achieve its stated purpose, the journal addresses the following key objectives:
dissemination of results of fundamental and applied scientific research in the fields of mechanics, mechanical engineering, technological processes, machine dynamics, and equipment, as well as in areas related to the application of vibration phenomena in engineering and technologies;
promotion of research aimed at the creation and improvement of machines, mechanisms, and technological equipment based on oscillatory and vibration processes;
support for the implementation of modern technological solutions focused on improving productivity, energy efficiency, and reliability of technical systems;
обеспечение scientific exchange of research results among research institutions, higher education establishments, and industrial enterprises;
development of interdisciplinary cooperation among researchers in the fields of mechanics, materials science, material processing technologies, and automation of technological processes;
dissemination of modern scientific achievements and advanced technologies related to the application of vibration processes in production and technical systems.
Publisher Vinnytsia National Agrarian University
In June 1994 the 2nd International Scientific and Technical Conference "Application of vibrations for technological purposes" was organized on the basis of Vinnytsia State Agricultural Institute. Leading experts in this field, noting the significant contribution to the school of Vibration Engineering under the leadership of P. S. Bernyk, proposed to create a professional all-Ukrainian scientific and technical journal "Vibration in engineering and technology..The journal was foundedat Vinnytsia State Agricultural Institute and P.S. Bernyk was elected to be the chief editor .
For all these years (since 1994) theJournal "vibration in engineering and technology" published 119 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Ihor Kupchuk, Candidate of Technical Sciences, Associate professor, Associate Professor of the Department of Engineering Mechanics and Technological Processes in the Agricultural Industry Faculty of Engineering and Technology Vinnytsia National Agrarian University is the chief editor of the "Vibrations in engineering and Technology"
The journal "Vibration in Engineering and technology", which has no analogues on the territory of Ukraine, is well known abroad.
