Issue №: 1(120)
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.
NIP ANGLE OF A VIBRATORY JAW CRUSHER WITH AN INCLINED CRUSHING CHAMBER
Fedoskinа Olena Ph.D., Associate Professor, Associate Professor of Engineering and Generative Design Departement, Dnipro University of Technology, St. Yavornytsky, 19, Dnipo, Ukraine, 49005, e-mail: fedoskina.ev@gmаil.com, https://orcid.org/0000-0003-3719-8375
The article examines the equilibrium conditions of a material piece during its clamping between the jaws of a vibrating jaw crusher with an inclined crushing chamber. The crusher design includes a body mounted on elastic elements, featuring a rigidly connected inclined lower jaw and a hinged upper jaw, which together define the nip angle. The physical picture of the jaw-material interaction, obtained via high-speed imaging, demonstrates a stable position of the piece on the transporting surface of the jaw during the clamping phase, which is characteristic of this process.
Dynamic processes during the clamping period were investigated using a vibration-measuring system equipped with displacement and acceleration sensors, a magneto-induction tachometer, and an oscilloscope. The study determined the contact time between the jaw working surfaces and the material, the vibration amplitude, and the acceleration of the upper jaw. Experimental oscillograms characterize the dynamics in the contact zone with a non-crushable object and during jaw wedging.
Analysis of the oscillograms reveals that during the entire clamping period, the upper jaw is subjected to a high-frequency alternating force directed perpendicularly to its working surface. This result justifies the application of an effective friction coefficient for determining the nip angle. A mathematical model has been developed to establish the limiting nip angle for inclined crushing chambers, accounting for inertial forces and the effective friction coefficient.
The obtained results provide a basis for designing advanced crushing chambers and optimizing the production of fine-grained materials.
1. Blake, E.W. (1858). Machine for crushing stone (U.S. Patent No. 20,542). U.S. Patent and Trademark Office.
2. Biletskyi, V.S., Oliinyk, T.A., Smyrnov, V.O., & Skliar, L.V. (2019). Tekhnika ta tekhnolohiia zbahachennia korysnykh kopalyn. Chastyna I. Pidhotovchi protsesy [Technique and technology of mineral processing. Part I. Preparatory processes]. FOP Cherniavskyi D. O.
3. Okechukwu, C., Dahunsi, O., Oke, P., Oladele, I., Dauda, M., & Olaleye, B. (2017). Design and operations challenges of a single toggle jaw crusher: A review. Nigerian Journal of Technology, 36(3), 814–821. https://doi.org/10.4314/njt.v36i3.19
4. Murithi, M., Keraita, J. N., Obiko, J. O., Mwema, F. M., Wambua, J. M., & Jen, T.-C. (2022). Optimisation of the swinging jaw design for a single toggle jaw crusher using finite element analysis. International Journal of Interactive Design and Manufacturing, 18, 6351-6358. https://doi.org/10.1007/s12008-022-00958-8
5. Blokhin, V.S., Bolshakov, V.I., & Malich, N.G. (2006). Osnovnye parametry tekhnologicheskikh mashin. Mashiny dlya dezintegratsii tverdykh materialov [Basic parameters of technological machines. Machines for disintegration of solid materials] (Vol. 1). IMA-press.
6. Serho, E.E. (1975). Droblenie, izmelchenie i grokhochenie poleznykh iskopaemykh [Crushing, grinding and screening of minerals]. Vyshcha Shkola.
7. Mazur, M. (2019). Examples of vibratory crushers applications in crushing technological lines. New Trends in Production Engineering, 2(1), 28–36. https://doi.org/10.2478/ntpe-2019-0003
8. Nazarenko, I.I., & Mishchuk, Y.O. (2013). Analiz konstruktsii vibratsiinykh shchokovykh drobarok i tendentsii ikh udoskonalennia [Analysis of designs of vibratory jaw crushers and trends of their improvement]. Vibratsii v tekhnitsi ta tekhnolohiiakh, 71(3), 41–46.
9. Nazarenko, I.I. (2007). Mashyny ta obladnannia pidpryiemstv budivelnykh materialiv [Machines and equipment of construction materials enterprises]. KNUBA.
10. Mishchuk, Y. (2024). Ohliad konstruktsii ta otsinka tekhnolohichnykh i konstruktivnykh parametрів drobylnoho obladnannia budindustrii [Review of designs and evaluation of technological and constructive parameters of crushing equipment of the construction industry]. Tekhnika budivnytstva, 41, 22–39. https://doi.org/10.32347/tb.2024-41.0403
11. Kondrachuk, M.V., Khabutel, V.F., Pashechko, M.I., & Korbut, Y.V. (2009). Trybolohiia [Tribology]. NAUdruk.
12. Kovtun, A.V. (2025). Pro zminu efektyvnykh koefitsiientiv sukhoho tertia pry vibratsii vkladenykh konstruktsii [On the change of effective coefficients of dry friction during vibration of nested structures]. Vibratsii v tekhnitsi ta tekhnolohiiakh, 117(2), 28–35. https://doi.org/10.37128/2306-8744-2025-2-4
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.
