地铁车辆合成闸瓦产生裂纹的原因及其解决措施
孔德鹏1王超恒1李国庆1尚小菲2宋传云1
Causes and Countermeasures of Cracks in Composite Brake Shoe of Metro Vehicle
KONG DepengWANG ChaohengLI GuoqingSHANG XiaofeiSONG Chuanyun
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作者信息:1.1.中车青岛四方车辆研究所有限公司， 266031， 青岛；
2.2.中车长客股份有限公司， 130052, 长春
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Affiliation:CRRC Qingdao Sifang Rolling Stock Research Institute Co., Ltd., 266031, Qingdao, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2021.07.046
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中图分类号/CLCN:U270.351
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栏目/Col:应用技术
摘要:
对某A型地铁车辆采用的进口JURID J2338合成闸瓦产生裂纹的原因进行分析。闸瓦产生裂纹后须及时换新并提前报废处理，增加使用和维护成本；若闸瓦产生裂纹后未及时换新，可能进一步发生闸瓦掉块甚至造成磨托，影响列车的运行安全。通过对闸瓦与踏面的匹配关系分析、闸瓦的压缩强度校核计算及闸瓦弯曲试验，找到了JURID J2338合成闸瓦产生裂纹的主要原因是闸瓦局部存在应力集中。建议合成闸瓦装车后，采用小级别纯空气制动进行闸瓦磨合，使闸瓦与踏面有效接触面积达到80%以上，消除应力集中。
Abstracts:
The reason of cracks in imported JURID J2338 composite brake shoe used in an A-Type metro vehicle is analyzed. After the brake shoe cracks, it must be replaced in time and discarded in advance, which will increase the cost of use and maintenance. If the brake shoe is not replaced in time after the crack occurs, the brake shoe may further fall off and even cause wear, which affects the safety of train operation. Through analysis of the matching relationship between brake shoe and tread, compression strength calculation and bending test of brake shoe, it is found that the main reason for cracks occurring in JURID J2338 brake shoe is local stress concentration of the brake shoe. It is recommended that after synthetic brake shoes are loaded, a small-level air brake can be used during run-in period, so that the effective contact area of the brake shoe and the tread surface can reach more than 80%, and stress concentration can be eliminated.
引文 / Ref:
孔德鹏，王超恒，李国庆，等.地铁车辆合成闸瓦产生裂纹的原因及其解决措施[J].城市轨道交通研究，2021，24(7):208.
KONG Depeng，WANG Chaoheng，LI Guoqing，et al.Causes and countermeasures of cracks in composite brake shoe of metro vehicle[J].Urban Mass Transit，2021，24( 7 )：208.
KONG Depeng，WANG Chaoheng，LI Guoqing，et al.Causes and countermeasures of cracks in composite brake shoe of metro vehicle[J].Urban Mass Transit，2021，24( 7 )：208.
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