地铁车辆轴承定位销断裂原因分析及解决措施
刘志远李涛薛世海张文康舒友徐芳
Fracture Failure Analysis of Metro Vehicle Bearing Positioning Pin and Solutions
LIU ZhiyuanLI TaoXUE ShihaiZHANG WenkangSHU YouXU Fang
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作者信息:中车长春轨道客车股份有限公司，130062，长春
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Affiliation:CRRC Changchun Railway Vehicles Co., Ltd., 130062, Changchun, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2020.07.045
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中图分类号/CLCN:U260.331+.2
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栏目/Col:应用技术
摘要:
以某地铁车辆轴承定位销断裂故障为例，分析了问题发生的根源，确定了轴承外圈施加的夹紧力不足和轴承定位销强度不足是导致定位销断裂的主要影响因素。通过结构分析、试验测试，提出轴承定位销断裂问题的解决措施为：轴箱后盖密封垫材质采用泡沫橡胶，从根本上解决轴承外圈轴向夹紧力不足的问题；优化定位销的焊接方式，采用4条焊缝并进行Tig(非熔化极惰性气体保护电弧焊)重熔焊接。试验验证表明，改进方案能够解决车辆轴承定位销断裂问题。
Abstracts:
Based on a case of metro vehicle bearing positioning pin fracture failure, the root cause for the problem is analyzed. The insufficient clamping force from the bearing outer ring and insufficient strength of bearing positioning pin are identified as the main factors accounting for positioning pin fracture. Through structure analysis and experimental test, solutions for the positioning pin fracture failure are discussed, which propose the adoption of foam rubber for axle box back cover gasket to fundamentally solve the problem of insufficient clamping force from the bearing outer ring; and the optimization of welding method for positioning pin by using the Tig (tungsten insert gas) remelting welding of four seams. Test result indicates that the above measures can solve the problem of vehicle bearing positioning pin fracture failure.
引文 / Ref:
刘志远，李涛，薛世海，等.地铁车辆轴承定位销断裂原因分析及解决措施[J].城市轨道交通研究，2020，23（7）：204.
LIU Zhiyuan，LI Tao，XUE Shihai，et al.Fracture Failure Analysis of Metro Vehicle Bearing Positioning Pin and Solutions[J].Urban mass transit，2020，23（7）：204.
LIU Zhiyuan，LI Tao，XUE Shihai，et al.Fracture Failure Analysis of Metro Vehicle Bearing Positioning Pin and Solutions[J].Urban mass transit，2020，23（7）：204.
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