Experimental research on the friction and wear properties of a contact strip of a pantograph–catenary system at the sliding speed of 350 km/h with electric current

Yang, Hang; Chen, G.X.; Gao, Guoqiang; Wu, Guangning; Zhang, W.H.

doi:10.1016/j.wear.2014.11.004

Cited by 68 publications

(37 citation statements)

References 24 publications

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“…PM 10 originates from the wheel–rail–brake pad interface due to mechanical wear caused by the structural characteristics of the subway tunnels [ 5 , 29 , 36 ]. According to Park et al [ 16 ], 67.7% of PM 10 originates from the wheel–rail–brake and catenary interfaces in subway tunnels.…”

Section: Resultsmentioning

confidence: 99%

Sources and Characteristics of Particulate Matter in Subway Tunnels in Seoul, Korea

Lee

Kim

et al. 2018

IJERPH

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Hazards related to particulate matter (PM) in subway systems necessitate improvement of the air quality. As a first step toward establishing a management strategy, we assessed the physicochemical characteristics of PM in a subway system in Seoul, South Korea. The mean mass of PM10 and PM2.5 concentrations (n = 13) were 213.7 ± 50.4 and 78.4 ± 8.8 µg/m3, with 86.0% and 85.9% of mass concentration. Chemical analysis using a thermal–optical elemental/organic carbon (EC–OC) analyzer, ion chromatography (IC), and inductively coupled plasma (ICP) spectroscopy indicated that the chemical components in the subway tunnel comprised 86.0% and 85.9% mass concentration of PM10 and PM2.5. Fe was the most abundant element in subway tunnels, accounting for higher proportions of PM, and was detected in PM with diameters >94 nm. Fe was present mostly as iron oxides, which were emitted from the wheel–rail–brake and pantograph–catenary wire interfaces. Copper particles were 96–150 nm in diameter and were likely emitted via catenary wire arc discharges. Furthermore, X-ray diffraction analysis (XRD) showed that the PM in subway tunnels was composed of calcium carbonate (CaCO3), quartz (SiO2), and iron oxides (hematite (α-Fe2O3) and maghemite-C (γ-Fe2O3)). Transmission electron microscopy images revealed that the PM in subway tunnels existed as agglomerates of iron oxide particle clusters a few nanometers in diameter, which were presumably generated at the aforementioned interfaces and subsequently attached onto other PM, enabling the growth of aggregates. Our results can help inform the management of PM sources from subway operation.

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Section: Resultsmentioning

confidence: 99%

Sources and Characteristics of Particulate Matter in Subway Tunnels in Seoul, Korea

Lee

Kim

et al. 2018

IJERPH

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“…Thus, the load, i.e., the contact force between materials, is not controlled actively. There exist apparatuses, which provide the load by a servo motor [7], [8]. However, the control of the contact force has not been discussed.…”

Section: Introductionmentioning

confidence: 99%

Reduction of Contact Force Fluctuation for Rotary Wear Test Apparatus

Yokoyama

Shimono

Yamashita

et al. 2020

IEEE/ASME Trans. Mechatron.

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In electric railway systems, wear of current collector devices leads to high maintenance cost. To develop a cost reduction methodology, the wear behavior of current collector materials needs to be fully investigated. However, the wear test apparatuses currently in use cannot control the contact force between materials, and the contact force fluctuates. It is difficult to classify accurate conditions of a wear transition under contact force fluctuation. To solve this problem, we propose a force control system with acceleration and velocity feedbacks to suppress the force fluctuation. The positive feedback of acceleration compensates the periodic force fluctuation at frequencies according to the sliding velocity of rubbing surfaces. The velocity feedback compensates the force fluctuation caused by resonance. The proposed control system is validated by experiments using a prototype of a rotary wear test apparatus.

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“…et al studied the friction and wear properties of a contact strip rubbing against a contact wire. The result showed that the interfaced relative speed and the surface temperature have a certain effect on current and wear [8]. Jia S.G. has studied the sliding wear behavior of the Cu-Ag-Cr wire and found the effects of positive pressure and sliding speed on the wear of Cu-Ag-Cr wire.…”

Section: Introductionmentioning

confidence: 99%

Friction and Wear Mechanism Analysis of Polymer Flexible Cable Using a High Natural Frequency Piezoelectric Sensor

Ren

Zheng

2020

Sensors

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The friction and wear of flexible cables are the main factors that cause electrical breakdown and insulation aging, and they greatly reduce the reliability and safety of robots. In order to enhance the reliability and safety of the robot, it is of great necessity to investigate the friction and wear mechanisms of the flexible cable. In this research, the friction and wear mechanisms have been discussed. The effects of relative speed, ambient temperature, and positive pressure on the flexible cables are considered by an orthogonal frictional movement. The cable friction force has been measured by a piezoelectric sensor with high natural frequency characteristics. The relations among friction and different factors affecting friction have also been discussed. The results show that the relative speed and the ambient temperature are the main factors affecting the friction and wear of the cable; the main form of flexible cable wear is mechanical-force chemical friction and wear. Those discoveries will greatly deepen the understanding of the friction and wear mechanisms of flexible cables, and will be beneficial to robot cable-reliability design.

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Experimental research on the friction and wear properties of a contact strip of a pantograph–catenary system at the sliding speed of 350 km/h with electric current

Cited by 68 publications

References 24 publications

Sources and Characteristics of Particulate Matter in Subway Tunnels in Seoul, Korea

Sources and Characteristics of Particulate Matter in Subway Tunnels in Seoul, Korea

Reduction of Contact Force Fluctuation for Rotary Wear Test Apparatus

Friction and Wear Mechanism Analysis of Polymer Flexible Cable Using a High Natural Frequency Piezoelectric Sensor

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