Study on abnormal abrasion of metro pantograph
Pantograph-catenary system is the central system for the power supply of urban rail transit trains. Higher train speed and complex train operating environment can generate severe vibrations on the pantograph-catenary system, resulting in high-frequency arcing and abnormal abrasion of pantograph. Tak...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Electric Drive for Locomotives
2023-07-01
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| Series: | 机车电传动 |
| Subjects: | |
| Online Access: | http://edl.csrzic.com/thesisDetails#10.13890/j.issn.1000-128X.2023.04.102 |
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| Summary: | Pantograph-catenary system is the central system for the power supply of urban rail transit trains. Higher train speed and complex train operating environment can generate severe vibrations on the pantograph-catenary system, resulting in high-frequency arcing and abnormal abrasion of pantograph. Taking the abnormal abrasion of the pantograph-catenary system in a metro project as an example, this paper studies the relationship between operation indicators and the abnormal abrasion of pantograph-catenary system, and correlations among the operation indicators. Firstly, this paper proposed the selection of indicators influencing the abnormal abrasion of pantograph-catenary system based on the definition of status indicator of pantograph-catenary operation and calculation formula. The data collection system of the metro line was established to obtain the measured data in the operation of the metro. Secondly, this paper statistically analyzed the distribution law and change trend of the indicators of old and new sliders under different working conditions, and studied the correlation among the indicators. Finally, under the same working condition, spatiotemporal dimension association analysis was used to analyze the internal connections and differences of each indicator in terms of space and time. The research results show that: in the early stage of running-in between the slider and the catenary, the arcing rate increases due to the lack of an oxide layer, which leads to an increase in the arcing rate of the pantograph-catenary contact, but the change trend between the indicators is not obvious. As the slider runs to a stable abrasion period, there is a strong correlation between the offline rate of the pantograph, arcing rate, and abnormal rate of the hard point. When one of the indicators is abnormal, it is always accompanied by the abnormality of the other indicators. The occurrence of abnormal abrasion is often accompanied by the abnormality of pantograph-catenary operation indicators. The monitoring and prevention of abnormal abrasion of pantograph-catenary can be completed by monitoring operation parameters, which provides an effective method for studying the mechanism of abnormal abrasion of pantograph-catenary. |
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| ISSN: | 1000-128X |