刚性接触网-受电弓载流磨损性能的试验研究

梅桂明

doi:10.3969/j.issn.0258-2724.20200432

刚性接触网-受电弓载流磨损性能的试验研究

doi: 10.3969/j.issn.0258-2724.20200432

梅桂明

西南交通大学牵引动力国家重点实验室，四川成都 610031

基金项目: 国家重点研发计划（2016YFB1200401-102B）

详细信息

作者简介:
梅桂明（1974—），男，副研究员，研究方向为弓网动力学及磨损，E-mail：13880068468@163.com

中图分类号: TH117.1；U264.34
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- 被引次数: 0
出版历程
- 收稿日期: 2020-06-27
- 修回日期: 2020-10-28
- 网络出版日期: 2020-12-15
- 刊出日期: 2020-12-15

Experimental Study on Wear Performance of Rigid Catenary-Pantograph System with Direct Current

MEI Guiming

State Key Laboratory of Traction Power，Southwest Jiaotong University，Chengdu 610031，China

摘要

摘要:
为了认识刚性接触网系统接触线和受电弓滑板异常摩耗的机理、提高刚性接触网系统摩擦元件的使用寿命，根据地铁刚性接触网系统的工作条件，使用环-块式载流摩擦磨损试验机，对刚性接触网系统的载流摩擦磨损性能进行了试验研究. 试验电流为0、400 A （DC），滑动速度为60 km/h，接触法向力为30 N，滑动距离为900 km. 在试验过程中测量了弓网之间的滑动摩擦因数、滑板磨损量、滑板温度、电弧电流和电压等参数，计算了滑板的磨损率和电弧能量. 试验结果表明：试验得到的滑板磨损率与实际地铁线路刚性接触网滑板的磨损率接近；直流电流对滑板的磨耗和温度有严重的影响，有电流时（400 A）滑板磨损率和温度分别是无电流时滑板磨损率和温度的53.0倍和7.4倍；引起滑板严重磨耗的原因主要是电弧烧蚀和黏着磨损.
- 磨损 /
- 电接触 /
- 刚性接触网 /
- 接触线 /
- 受电弓滑板
Abstract:
In order to understand the abnormal wear mechanism of the contact wire and the pantograph strip in the rigid catenary system, and to improve the service life of its friction elements, tests were carried out on the current-carrying friction and wear performance of the rigid catenary system with a block-on-ring current-carrying friction and wear tester. The test parameters were set as: the test current of 0, 400 A (DC), sliding speed of 60 km/h, the contact normal force of 30 N, and sliding distance of 900 km. During the tests, the sliding friction coefficient between the pantograph strip and catenary wire, the wear volume and the temperature of the pantograph strip, arc current and voltage were measured, and the wear rate of the pantograph strip and arc energy were calculated. The test results show that the tested wear rate of the pantograph strip is close to the one for actual subway lines. The DC current has a serious impact on the wear and temperature of the pantograph strip. The wear rate and temperature of the pantograph strip with DC 400 A are about 53.0 times and 7.4 times higher than those without electric current, respectively. The serious wear of the pantograph strip is mainly caused by arc ablation and adhesive wear.
- wear /
- electric contact /
- rigid catenary /
- contact wire /
- pantograph strip

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图 1 试验机

Figure 1. Test machine

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图 2 接触线-滑板摩擦副的温度测量结果

Figure 2. Measured temperature of contact wire-strip pair

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图 3 摩擦因数随滑动距离的变化

Figure 3. Variation of friction coefficient against sliding distance

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图 4 滑板磨损率随滑动距离的变化

Figure 4. Variation of wear rate against sliding distance

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图 5 滑板的最高温度随滑动距离的变化

Figure 5. Variation of strip temperature against sliding distance

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图 6 电弧能量随滑动距离的变化

Figure 6. Variation of arc energy against sliding distance

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图 7 滑板和接触线的磨痕形貌

Figure 7. Surface topography of strip and wire scars

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图 8 滑板磨痕的SEM和EDS分析

Figure 8. SEM photograph and EDS analysis of strip scar

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表 1 接触线的化学成份和物理性能

Table 1. Physical parameters and chemical compositions of contact wire

成份质量分数/%

铜 > 99.70
银 0.10
氧 < 0.03
杂质 < 0.03
密度/ （g•cm⁻³） 8.96
硬度/HB 90

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表 2 滑板材料的化学成份和物理性能

Table 2. Chemical compositions and physical parameters of strip

成份质量分数/%

铜 24.49
碳 71.62
杂质 3.89
密度/（g•cm⁻³） 2.30
硬度/HS 100

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