Influence of Copper Content on Pantograph Contact Strip Material on Maximum Temperature of Railroad Wire

Mańka, A.; Hełka, A.; Ćwiek, J.

doi:10.20858/sjsutst.2020.106.8

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…Although both the contact and the energy collection capabilities might be enhanced, it is also true that both systems suffer rapid wear. Several studies have been carried out to understand and measure the wear mechanism [1][2][3][4], and to develop new chemical compositions of OCW, shifting from pure copper to copper-based carbon composites [5][6][7]. In order to ensure railway service quality and safety, OCW wear measurements are required.…”

Section: Introductionmentioning

confidence: 99%

Railway overhead contact wire monitoring system by means of FBG sensors

Ciro

Lupi

Felli

et al. 2021

Frattura Ed Integrità Strutturale

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Safety of infrastructures represents one of the most significant concerns for governments and service providers to preserve people's well-being. One of the main ways to keep in safe facilities (buildings, bridges, railways, etc.) involves the use of monitoring sensor systems in charge of measuring critical operating conditions. Those measurements together with periodical maintenance, contribute to minimize potential risks that the infrastructure faces. The paper aims at designing, developing, and testing a monitoring system for mechanical stresses acting on the overhead contact wire (OCW) to ensure the operational safety of the railway network. In this regard, the paper proposes two Fiber Bragg Grating (FBG) sensors-based solutions, relying on the ability of these sensors to allow real-time and continuous data acquisition. The first one consists in a polyimide-coated sensor bonded on an OCW clamp, the second one is a copper-coated sensor hanging between the two separated halves of an OCW clamp. Significant results have been obtained mechanically testing both solutions, trying to simulate the operative conditions.

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Section: Introductionmentioning

confidence: 99%

Railway overhead contact wire monitoring system by means of FBG sensors

Ciro

Lupi

Felli

et al. 2021

Frattura Ed Integrità Strutturale

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“…Therefore, to be able to select appropriate materials conforming to national conditions, it was necessary to carry out verification tests in accordance with normative requirements [16][17][18][19]. In our laboratory, we have also carried out numerous certification [20] and operational [21] tests to assess the quality of cooperation between carbon contact strips and copper contact wire on rolling stock operated in Poland. In these studies, special attention was paid to thermal issues.…”

Section: Introductionmentioning

confidence: 99%

“…As stated based on previous studies, the basic feature that affects the possibility of using a given contact strip is its electrical conductivity, which is directly determined by the amount of copper content in the carbon composite. Therefore, we earlier tested the concentration of metals used in contact wire and its effect on the resulting thermal resistance [21] as a basis for the current study.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Pantograph Carbon–Metal Composite Slider Thermal Properties on the Railroad Wire Temperature

2021

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This article presents the methodology, description, and results of experimental studies aimed at determining the impact of the copper concentration in a carbon–metal composite contact strip on the maximum temperature of the copper contact wire during a contact event when used for operation in the railway industry in Europe. Based on these tests, we determined the minimum percentage of copper that is required for the composite to meet the normative requirements for current loads. In addition to experimental research, a 3D FEM numerical model was also developed in which the contact strip and contact wire geometry were mapped, along with imposed loads resulting from the test for current loads mentioned above. Fifteen simulation variants were carried out for the established model, where the value of the thermal conductivity coefficient and the specific heat coefficient were varied. On this basis, we analyzed the sensitivity of thermal coefficients to the contact wire temperature and determined the minimum conductivity coefficient value, which allowed the maximum copper contact wire temperature of 120 °C to be obtained during the verification tests.

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Influence of pressure on the change of temperature inside the elastic element under dynamic stress

Krajňák,

Grega,

Puškár

2022

MATEC Web Conf.

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The article describes the change in temperature inside the elastic element when the pressure changes. These flexible elements are used in flexible pneumatic couplings developed at our workplace and are pressurized by a certain value of pressure depending on the transmitted torque. We test the given elements on a test rig designed at our workplace. It describes this device in detail in this article. On this device we test these elastic elements at different pressures. We find out how much influence the pressure value in the elastic element has on the change of temperature inside the element. We will find out whether the change in pressure also has a significant effect on the change in temperature and whether this temperature also affects the functionality of the device in which these elements are used.

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Influence of Copper Content on Pantograph Contact Strip Material on Maximum Temperature of Railroad Wire

Cited by 5 publications

References 3 publications

Railway overhead contact wire monitoring system by means of FBG sensors

Railway overhead contact wire monitoring system by means of FBG sensors

The Influence of Pantograph Carbon–Metal Composite Slider Thermal Properties on the Railroad Wire Temperature

Influence of pressure on the change of temperature inside the elastic element under dynamic stress

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