广州地铁2号线弓网关系优化设计研究

Research on Optimal Design of Pantograph-catenary Relationship of Guangzhou Metro Line 2

研究目的:架空刚性接触网由于优点突出,现已成为我国地铁隧道内架空受流方式的首选。广州地铁2号线十多年的运营效果表明,架空刚性接触网系统仍存在一些技术问题,如弓网磨耗异常、绝缘关节处拉弧、中心锚结处汇流排抬升量异常等。为解决和改善这些问题,延长刚性接触网系统的寿命,保证运营安全、稳定,开展有针对性的设计,对既有线路刚性悬挂进行改造和优化。研究结论:(1)受电弓碳滑板的磨耗异常与接触网拉出值分布不均、受电弓的结构、弓头质量、碳滑板材质、受电弓取流较大且受较大振动等因素紧密相关,绝缘锚段关节处拉弧与受电弓碳滑板工作面不能保持与轨面平行及弓网接触面为无缓冲刚性接触有关,中心锚结设置在跨中两定位点间的方式恶化了弓网关系;(2)架空刚性接触网系统的平面布置采用双折线方案以改善弓网磨耗异常问题,使用新型刚性悬挂弹性装置以增加系统弹性,中心锚结安装在锚段中间的定位悬挂点处以改善汇流排高度异常抬升问题;(3)本研究成果可应用于采用刚性接触网系统的城市和地区轨道交通工程的设计、建设、改造及运营实践中,具有借鉴和指导意义。

Research purposes： Due to the outstanding advantages, overhead rigid eatenary has become the first selection of overhead flow method in subway tunnels in our country. Guangzhou metro line 2 for more than ten years of operating results show that there are still some technical problems in the overhead rigid eatenary system, such as the abnormal abrasion of pantograph - catenary, the insulation joint are, central anchor knot in busbar lifting abnormal amount, etc. In order to solve and improve these problems in the operation, prolong the life of rigid eatenary system and ensure operational security and stability, carry out a targeted design, modify and optimize the rigid suspension of existing lines. Research conclusions： （1） Carbon pantograph slide abnormal abrasion is closely related to these factors, such as uneven distribution of catenary stagger value, the structure of the pantograph, weight of pantograph, carbon plate material quality, pantograph take larger current and serious vibration; insulating the anchor segment joints arc is related to that pantograph slide carbon board can＇t keep parallel to the rail surface and pantograph - catenary interface is unbuffered rigid contact; the way that central anchor knot setting in between the two anchor point worsens pantograph -catenary relation. （2） Overhead rigid catenary system layout uses double broken line scheme to improve the pantograph -catenary abnormal abrasion problem, uses new type of rigid suspension elastic device increase system flexibility; central anchor knot is installed in the middle of the anchor segment suspension point positioning to improve busbar height anomaly. （3） The research results can be applied to the design, construction, renovation and operation practice of urban and regional rail transit engineering, with strong reference and guiding significance.