Vibrations in engineering and technology


Issue №: 3 (94)

Published: 2019.06.26
DOI: 10.37128/2306-8744-2019-3

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.

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Investigation of the process of peeling walnuts between two parallel plates

DOI: 10.37128/2306-8744-2019-3-14
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Polievoda Yurii – candidate of technical sciences, associate professor of the department of technological processes and equipment for processing and food production, Vinnytsia National Agrarian University: Vinnitsia, st. Sonyachna 3, VNAU, 21008, e-mail: vinyura36@gmail.com.


The article provides a detailed overview of the process of splitting the kernel of a walnut.  Examples of many ways to split the shell are given, all of their disadvantages and advantages are listed. The mechanical method of peeling nuts using low-frequency oscillations has been theoretically investigated and substantiated.
The kinematics of the process of crushing nuts between two parallel plates has been extensively analyzed. Graphical correlations were obtained between the size of the nut shell and the dynamics of the driving force of the nut moisture. It is revealed that the process of destruction of the shell of a walnut consists of four stages, corresponding to the laws of brittle destruction.
Presents: - dependence of the maximum force of crushing of a shell of a nut at 5% humidity;  - the dependence of the maximum crushing force of nuts at different shell thickness for the case of horizontal positioning of the nut between two plates with perpendicular force on the surface of the joint halves of the nut;  - the dependence of the maximum crushing force according to the humidity of the nuts at different shell thicknesses for the case of vertical positioning of the nut between two parallel plates with a vertical driving force;  - the dependence of the maximum crushing force with the moisture of the nuts at different shell thicknesses for the case of horizontal positioning of the nut between two parallel plates with a force action along the slit.
The energy of splitting (crushing) of nuts at their location in different positions between two parallel plates is also determined. Where it has been proved that the energy consumed in the process of crushing increases with the thickness of the shell of a walnut. At the same time, it is proved that energy consumption depends on the location of the nut in the process of crushing.  Graph analyzes were performed to show that maximum crushing energy is recorded in the case of a horizontal arrangement of a nut with a perpendicular crack action.
In this study, a large amount of information was obtained regarding the splitting of the walnut, depending on the structural and mechanical characteristics of the products, which in the process of processing are important for the determination of certain rational technological parameters.

Keywords: splitting process, splitting energy, driving force, dynamics of change, humidity.

List of references

1. Dontsova I.V. (2017).  Horikh voloskyi – perspektyvna vysokotsinna prodovolcha ta promyslova syrovyna [Walnut – a promising high-value food and industrial raw materials] Aktualni problemy ekonomiky i torhivli v suchasnykh umovakh yevrointehratsii : materialy shchorichnoi naukovoi konferentsii - Topical Problems of Economy and Trade in Modern Conditions of European Integration: Proceedings of the Annual Scientific Conference. 92-98 Lviv [in Ukrainian].
2. Fedosova K. S. (2005). Rozrobka tekhnolohii konservuvannia vodianoho horikha [Development of technology for canning of walnut]. Avtoref. dys... kand. tekhn. nauk - Author's abstract  dissertation ... cand.  tech. Odesa. nat.  acad. food.  Technologies. 19 [in Ukrainian].
3. Boiko A.V. (2010). Ustanovka dlia rozkoliuvannia horikhiv [Installation for splitting nuts]. Mizhvuzivskyi zbirnyk «NAUKOVI NOTATKY» Intercollegiate Collection «SCIENTIFIC NOTES». 29, 28-31 [in Ukrainian].
4. Polievoda Y.A., Tverdokhlib I.V. (2019). Vyznachennia fizyko-mekhanichnykh parametriv shkaralupy voloskoho horikha. [Determination of physico-mechanical parameters of walnut shell].Vibratsii v tekhnitsi ta tekhnolohiiakh-Vibrations in technology and technology. 2 (93), 12-17 [in Ukrainian].
5. Yanovych V.P., Honcharuk I.V. [ta in.]. (2018). Rozrobka kompleksu tekhnolohichnykh mashyn dlia hlybokoi pererobky voloskoho horikha. [Development of a complex of technological machines for deep processing of walnut] Zvit pro naukovo-doslidnu robotu - Report on research work, VNAU, 82. [in Ukrainian].
6. Pat. KM 91325 Ukraina. (2014). Vibratsiine obladnannia dlia lushchennia voloskykh horikhiv [Vibrating equipment for shelling of walnuts]. Publ. 25.06.2014. [in Ukrainian].
7. Pat. KM 137018 Ukraina. (2019). Obladnannia dlia lushchennia voloskykh horikhiv [Equipment for shelling of walnuts]. Publ. 25.09.2019. [in Ukrainian].
8. Pat. KM 137176 Ukraina. (2019). Obladnannia dlia lushchennia voloskykh horikhiv [Equipment for shelling of walnuts]. Publ. 10.10.2019. [in Ukrainian].
9. Pat. KM 137177 Ukraina. (2019). Obladnannia dlia lushchennia voloskykh horikhiv [Equipment for shelling of walnuts]. Publ. 10.10.2019. [in Ukrainian].

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About journal

Topics of the journal:

The journal "Vibrations   in engineering  and technology" presents materials on the following issues

• Theory of processes and machines
• Mechanical Engineering and materialprocessing
• Processing and food production

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/

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Key information:
ISSN (print): 2306-8744
DOI: 10.37128/2306-8744

The certificateof massmedia State registration:kv no 16643-5115 from 30.04.2010 .
Founder of the journal: Vinnytsia National Agrarian University

Kind of publication: journal
Type of publication : Scientific
Publication status: Domestic
Year of founding:
Periodicity: 4 times a year
Extent: 18.75 nominal printed pages
ISSN: 2306-8744 (printed version), (online)
Language of edition  : (mixed languages) Ukrainian, English
The scope of the distribution and the category of readers: national, foreign, teaching staff, scientists, businessmen.
Periodical is included in the list of scientific professional editions of Ukraine approved by the Order of Ministry of Education and Sciences of Ukraine from 21.12.2015 No. 1328.
The journal "Vibrations in engineering and technology" is included in the "Catalogue of periodicals of Ukraine".
Journal subscription can be executed in each post office department.
 Subscription Index is  99720.


Old version of site: http://vibrojournal.vsau.edu.ua/

History of journal:

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  94 issues wherestudy of vibration effects, the creation of progressive energy saving technologies and equipment for their implementation were highlighted.
Currently Kaletnik H.M  PhD , professor, academician NAAS 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.