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Vibrations in engineering and technology

space SCIENTIFIC JOURNALS OF VINNITSA NATIONAL AGRARIAN UNIVERSITY

Issue №: 2(97)

Published: 1970.01.01
DOI: 10.37128/2306-8744-2020-2


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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MATHEMATICAL MODEL OF OVERHEAD PARAMETRIC EDDY CURRENT PRIMARY MEASURING TRANSDUCER OF ABSOLUTE MOVEMENT

DOI: 10.37128/2306-8744-2020-1-13
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Valeriy Granyak - Candidate of Technical Sciences, Associate Professor of the Department of Power Engineering, Electrical Engineering and Electromechanics, Vinnytsia National Agrarian University (3 Sonyachna Street, Vinnytsia, Ukraine e-mail: titanxp2000@ukr.net

Annotation

To date, even in the developed countries of Europe, more than 50% of the power generating equipment of hydropower plants have worked their design life. In the CIS countries, the percentage of such equipment is even higher. The complete replacement of such equipment requires a large amount of investment, while a significant part of the latter has a satisfactory technical condition for the further extension of the service life. However, with an increase in the operating time of every electrical equipments, the probability of its failure inevitably increases, which can lead to significant material losses and to a significant danger to the life and health of the power plant personnel. Therefore, in view of the foregoing, monitoring and early diagnosis systems, which are entrusted with the protection function of both hydraulic turbines and auxiliary power equipment, are becoming increasingly relevant. One of the most promising methods of technical control and diagnostics of hydraulic units is the analysis of their vibro-acoustic characteristics. Including the axial component. However, a significant technical problem that arises in the construction of such systems is the limited use of known absolute vibration displacement sensors due to the lack of their high-precision mathematical models.

In the article a mathematical model of an overhead parametric eddy current primary measuring transducer of absolute displacement has been developed. It is shown that both the effective value of the output current and the shift of its initial phase are found to be functionally dependent on the distance between the sensor and the conductive medium with a stable supply voltage. It has been established that, while ensuring acceptable overall dimensions, this sensor has sufficient sensitivity to convert the displacement to the effective (amplitude) value of the output current, which is constant in the range of movement from 0 to 5 mm, to ensure the required measurement accuracy.

 

Keywords: consignment note parametric eddy current sensor, mathematical model, static characteristic, sensitivity.

List of references

1. Alekseev B. A. (2002) Opredeleny`e sostoyany`ya (dy`agnosty`ka) krupnыx gy`drogeneratorov [Determination of the state (diagnosis) of large hydrogenerators]. 144 p. Moscow: NTs ENAS, 2002. [In Russian].

2. Hraniak V. F., Kukharchuk V. V., Kucheruk V. Y. and other (2018) Using instantaneous cross-correlation coefficients of vibration signals for technical condition monitoring in rotating electric power machine. No 1. P. 72-80. Bulletin of the Karaganda University. «Physics» series. [In English]

3. Shirman A. R., Soloviev A. B. (1996) Prakty`cheskaya vy`brody`agnosty`ka y` mony`tory`ng sostoyany`ya mexany`cheskogo oborudovany`ya [Practical vibration diagnostics and monitoring of the state of mechanical equipment]. 276 p. Moscow: Engineering, [In Russian]

4. Rao S. S. (2007) Vibration of continuous systems. 720 p. New York, USA: Jon Wiley & Sons [In English]

5. Kukarchuk V. V., Vedmitsky Y. G., Hranyak V. F. Vy`miryuvannya parametriv obertal`nogo ruxu elektromexanichny`x peretvoryuvachiv energiyi v perexidny`x rezhy`max roboty`: monografiya (2019) [Measurement of parameters of rotational motion of electromechanical energy converters in transient modes of operation: monograph]. 152 p. Vinnitsa: VNTU. [In Ukrainian]

6. Shkarlet Y. M. Nekotorыe voprosы teory`y` metoda vy`xrevыx tokov y` raschёt nakladnыx datchy`kov (1964) [Some questions about the theory of the method of eddy currents and the calculation of overhead sensors]. P. 56. Non-destructive methods of control of materials and products. Moscow: Ontipribor. [In Russian]

7. Russel F. J., Schuster V. E., Wiedelich D.L. (1962) Communication and electronics. Munich. 232 p. [In English]

8. Sobolev V. S., Shkarlet Y. M. Nakladnыe y` эkrannыe datchy`ky`: monografy`ya (1967) [Overhead and screen sensors: monograph]. 144 p. Novosibirsk: Science. [In Russian]

9. RFHIC. AE505: Datasheet. 5 p. Electronic resource. Access mode: https://pdf1.alldatasheet.com/datasheet-pdf/view/890164/RFHIC/AE505.html [In English]

 

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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.