Investigation of Properties of Current Collector Elements and Their Effect on the Performance of Tribosystem «contact Wire - Current Collector Element»

Bolshakov, Yu. L.; Антонов, Андрій Владиславович

doi:10.15802/stp2015/57006

Cited by 6 publications

(5 citation statements)

References 3 publications

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“…Система «пантограф -контактна мережа» своєю основною функцією має передачу електричної енергії електрорухомому складу. В рамках підвищення ефективності експлуатації електрифікованих залізниць потрібно удосконалювати існуючі та створювати нові пристрої і технології, які би забезпечили надійну і економну передачу електричної енергії електрорухо-мому складу [1], [2], а це має на увазі зниження зносу контактного проводу і випадків його руйнування, підвищення ресурсу полозів струмоприймачів і зменшення втрат під час процесу струмознімання. Найбільш відповідальним і водночас вразливим вузлом даної системи є сильнострумовий ковзний контакт, який утворений контактним проводом та контактною вставкою пантографа.…”

Section: вступunclassified

Thermal modes of operation of power-current contact of electric transport during conduct of bench tests

Муха¹,

Ustymenko²,

Diab³

2021

Elektroteh. elektroenerg.

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Purpose. Analysis of the results of bench tests of sliding electrical contacts of electric vehicles, in order to determine the thermal regime of the sliding contact. Methodology. The initial data were obtained during field experiments on a specialized stand in the laboratory, which were carried out to determine the wear of the contact wire inserts of different types for pantographs of electro-rolling stock of railways. To determine the contact wire temperature at the place of sliding contact, a non-destructive non-contact method of control using a thermal imager was used. Findings. During the experimental part of the research, the thermal imaging photographs were obtained, they recorded the temperatures at the place of sliding contact between the insert of the pantograph of the electric rolling stock and the contact wire installed on the test disk. These temperature values were recorded with a certain time interval, which allowed to build the dependences of changes in thermal regime over time, to determine the heating time constant of the "insert-contact wire" of the test bench and to obtain the final temperature value at the end of tests. Accepting the insert sample in which the minimum temperature in the area of sliding contact is as a reference, it becomes possible by the value of the temperature of the contact wire in the area of sliding contact to predict the final test result of other types of pads. Originality. Indicators of temperature modes of sliding contact of electric vehicles during bench tests are obtained for the first time, the proposed relative temperature indicator allows to predict the results of bench tests of qualitative indicators of sliding contact of electric vehicles.. Practical value. Bench tests of inserts of current collectors of electric vehicles are a long procedure, the normative indicator of the number of passes of the current collector on the stand is equal to 500 thousand passes, which requires significant expenditure of time, energy, human resources and others. The indicators proposed according to the test results, namely the heating time constant and the relative temperature index, allow to carry out two-stage tests. At the first stage, with a duration of 10 thousand revolutions of the test bench disk, the proposed indicators are determined and compared with the corresponding reference, in case of their compliance it becomes possible to predict the final test result as successful (contact wire wear less than normal) or unsuccessful. In the latter case, the need for the second stage of testing up to 500 thousand revolutions is questionable, because the end result will be negative, and the significant resources will be involved in the test, and therefore these tests are impractical.

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Section: вступunclassified

Thermal modes of operation of power-current contact of electric transport during conduct of bench tests

Муха¹,

Ustymenko²,

Diab³

2021

Elektroteh. elektroenerg.

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“…When studying the quality of fabrication of current collection inserts made by different manufacturers using field samples [7], the authors narrowed the range of hardness for coal inserts and devised a procedure for sorting coal inserts based on hardness; a mismatch was established between current collection inserts and existing regulatory requirements. The inserts have been found to demonstrate the structural heterogeneity of the material with fluctuations in the insert density lengthwise.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The scientific literature shows [6][7][8][15][16][17][18][19][20][21][22][23] that each researcher follows an individual path when tackling the problem of wear in the contact pair "a current collector's padthe contact wire". Some are trying to improve the coal insert, while others address the issue by adjusting the pull of the contact wire.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Comparative tests of contact elements at current collectors in order to comprehensively assess their operational performance

Babyak

Horоbets

Sychenko

et al. 2018

EEJET

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“…This is due to the fact that most current collectors of electric rolling stock are equipped with carbon contact elements [1]. And because of its mechanical strength and electrical characteristics [2] not always meet existing requirements [3] there is a problem of appearance pantograph damage and the wasteful use of contact elements that are constantly increasing in value.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Research of Contact Wire and Pantograph Contact Elements Wear

Антонов¹,

Sychenko²

2021

Metallofiz. Noveishie Tekhnol.

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The goal of the work is substantiation of using the proposed method of sliding high-current contact wear prediction by comparing the forecasting results with the experimental ones. In conditions of ensuring high quality services transportation of passengers and cargo, the issue of ensuring reliable operation of the high-current contact 'contact wire-pantograph contact element' becomes especially relevant. The reliability of the traction system as a whole depends of the high-current contact reliability. The feasibility of using the proposed method for predicting wear of sliding high-current contact is substantiated. This method differs from the existing ones due to possibility of taking into account the set of factors, which influence on current collection process, by comparison the predicted wear values of the sliding highcurrent contact with the data obtained experimentally. The results show a possibility of reducing the wear of the contact wire up to 11% in its interaction with graphite contact elements and increasing the efficiency of the use of contact elements up to 25%.

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Investigation of Properties of Current Collector Elements and Their Effect on the Performance of Tribosystem «contact Wire - Current Collector Element»

Cited by 6 publications

References 3 publications

Thermal modes of operation of power-current contact of electric transport during conduct of bench tests

Thermal modes of operation of power-current contact of electric transport during conduct of bench tests

Comparative tests of contact elements at current collectors in order to comprehensively assess their operational performance

Theoretical and Experimental Research of Contact Wire and Pantograph Contact Elements Wear

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