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Vibrations in engineering and technology

space SCIENTIFIC JOURNALS OF VINNITSA NATIONAL AGRARIAN UNIVERSITY

Issue №: 1(104)

Published: 2022.04.29
DOI: 10.37128/2306-8744-2022-1


Description:
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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PROSPECTS FOR DETECTING DEFECTS IN ROTATING ELECTRIC MACHINES ON THE BASIS OF THE ANALYSIS OF THEIR VIBRATION SIGNALS

DOI: 10.37128/2306-8744-2022-1-3
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Hraniak Valerii – Candidate of Science (Engineering), Associate Professor, Associate Professor of the Department of Power engineering, electrical engineering and electromechanics of Vinnitsa National Agrarian University. (3 Soniachna St., Vinnitsa, Ukraine, 21008, e-mail: titanxp2000@ukr.net)

Solona Olena – Candidate of Technical Sciences, (Ph. D in Engeneering), Associate Professor, Head of the Department of General Technical Disciplines and Occupational Safety, Vinnytsia National Agrarian University (3, Sonyachna Str., Vinnytsia, 21008, e-mail: solona_o_v@ukr.net)

 

Annotation

Ensuring the reliability of the operation of technological lines and mechanisms is one of the main conditions for the safe and productive operation of technological equipment. And since one of the key elements of the vast majority of modern equipment and mechanisms are rotating electrical machines, the reliability of the latter largely determines the reliability of the system as a whole.

The paper provides a detailed analysis of the prospects of using vibration signals to detect defects in rotating electrical machines. As a result of a statistical study conducted on the basis of studying the causes of emergency failures that occur during the operation of medium-power asynchronous electric motors based on the DTG "Energomash" and the analysis of literary sources, the most probable defects that occur during the operation of rotating electrical machines were identified. In particular, it was found that the most probable defects that occur during the operation of such equipment can be attributed to: rotor imbalance, bearing damage, asymmetry of the stator electromagnetic field and violation of the mechanical rigidity of the supporting structures.

Based on the study, it was theoretically substantiated and experimentally confirmed that the most common types of defects that are typical for rotating electrical machines cause a significant vibration response. In this case, the vibration response, containing information about the existing defects of electrical machines, can be measured directly in the operating mode of the electrical machine without the need to intervene in the design of the latter.

It was also shown that defects of various types that occur during the operation of rotating electrical machines are characterized by a relatively low severity in the early stages of defect development and selectivity, both in shape and in the frequency spectrum. Therefore, it is obvious that it is necessary to develop highly informative signs of the presence of defects of the considered type, characterized by increased severity and selectivity.

 

Keywords: electrical machine, defect, diagnostics, reliability, analysis.

List of references

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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

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

The certificateof massmediaState 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.