• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2022, Vol. 58 ›› Issue (12): 159-167.doi: 10.3901/JME.2022.12.159

• 运载工程 • 上一篇    下一篇

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轴式对大功率电力机车车轮第3类滚动接触疲劳的影响

刘永锋1,2, 陶功权1, 刘子通3, 赵鑫1, 温泽峰1   

  1. 1. 西南交通大学牵引动力国家重点实验室 成都 610031;
    2. 株洲中车时代电气股份有限公司轨交技术中心 株洲 412001;
    3. 中国铁路太原局集团有限公司太原机务段 太原 030045
  • 收稿日期:2021-07-07 修回日期:2021-12-05 出版日期:2022-06-20 发布日期:2022-09-14
  • 通讯作者: 温泽峰(通信作者),男,1976年出生,研究员,博士研究生导师。主要研究方向为轮轨关系与减振降噪。E-mail:zfwen@swjtu.edu.cn
  • 作者简介:刘永锋,男,1988年出生,博士,工程师。主要研究方向为轮轨滚动接触疲劳及黏着控制。E-mail:liuyongfeng1217@163.com
  • 基金资助:
    国家自然科学基金(51875484)、常规性科技援助项目(KY201701001)和牵引动力国家重点实验室(2019TPL-T17)资助项目

Effects of Axle Configuration on Third Type of Rolling Contact Fatigue of Wheels of High-power AC Locomotives

LIU Yongfeng1,2, TAO Gongquan1, LIU Zitong3, ZHAO Xin1, WEN Zefeng1   

  1. 1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031;
    2. Technology Center, Zhuzhou CRRC Times Electric Co., Ltd, Zhuzhou 412001;
    3. Taiyuan Locomotive Depot of China Railway Taiyuan Group Co., Ltd., Taiyuan 030045
  • Received:2021-07-07 Revised:2021-12-05 Online:2022-06-20 Published:2022-09-14

摘要: 六轴(Co-Co)和八轴(2(Bo-Bo))和谐型大功率电力机车在诸如小曲线和大坡度等线路上运行时,车轮名义滚动圆附近频繁发生沿车轮一周连续分布且近似横向的第3类滚动接触疲劳(简称RCF3),严重影响列车的安全运营。为了分析轴式对机车车轮RCF3的影响,基于SIMPACK多体动力学软件建立六轴和八轴机车的动力学模型,结合损伤函数预测车轮的RCF3。结果表明,曲线通过时,六轴和八轴机车仅在转向架端轴非导向轮对的高轨侧车轮发生RCF3,考虑左、右曲线和机车换向运行,曲线可导致RCF3发生在六轴机车的1、3、4和6轴以及八轴机车的所有车轮。轨面干态下通过平面曲线或曲线下坡时六轴机车车轮的裂纹萌生速率约为八轴机车的1.2~2.5倍,而轨面湿态下通过曲线上坡时八轴机车的磨耗速率约为六轴机车的1~1.5倍,因而六轴机车更易发生RCF3。其原因是六轴机车转向架固定轴距更大,导致曲线引起的负纵向蠕滑力幅值更大。在直线轨道运行时,轴式对车轮RCF3无影响;直线下坡运行时,RCF3在所有车轮发生。轨面干态下RCF3的生长速率随着曲线半径的减小或下坡坡度的增加而增大,轨面湿态下RCF3的生长速率随下坡坡度的增加先增大后减小,其原因是湿态下车轮纵向蠕滑率显著增大而引起磨耗,可磨掉萌生的RCF3。

关键词: 大功率电力机车, 轴式, 滚动接触疲劳, 损伤函数, 曲线, 坡道

Abstract: The third type of rolling contact fatigue(RCF3) has been observed on wheels of two types of high-power AC locomotives with six axles(Co-Co) and eight axles(2(Bo-Bo)) operating in complicated environments, such as sharp curves and steep slopes. RCF3 occurs as continuous lateral surface cracks in the zone approximately centered at the nominal rolling circle of wheels, which seriously affects the running safety. In order to analyze the influence of axle configuration on RCF3 of locomotive wheels, two multi-body dynamic models of both six-axle and eight-axle locomotives are established using the SIMPACK multi-body software, which are combining with the damage function to predict the wheel damage under complicated operation environments. The results show that RCF3 occurs only on wheels of end unguided wheelset of the bogies and locates at the high rail when curving. Considering the left and right curves and locomotive turning around, RCF3 can occur on wheels of the 1st, 3rd, 4th and 6th axles of six-axle locomotive and all wheels of 8-axle locomotive when curving. The crack growth rate of the wheels of six-axle locomotive is about 1.2-2.5 times of that of eight-axle locomotive under the dry condition when operating on the plane curves or curves with downhill slopes, while the wear rate of wheels of eight-axle locomotive is about 1-1.5 times of that of six-axle locomotive under the wet condition when operating on the curves with uphill slopes. These lead to RCF3 more likely to occur on wheels of six-axle locomotive. The root reason is that the fixed wheelbase of six-axle locomotive is larger, resulting in the larger magnitude of negative longitudinal creep force in curves. Operating on the tangent tracks, the axle configuration of locomotives has no effect on RCF3, and RCF3 occurs on all wheels operating on downhill slopes. The decrease of curve radius or the increase of the downhill slope will lead to the increase of the growth rate of RCF3 under the dry condition, and the growth rate of RCF3 first increases and then decreases as the increase of downhill slopes under the wet condition. The reason is that the significantly increased longitudinal creepage on wheels results in the increase of the wear under the wet condition, which can wear off the initiated RCF3.

Key words: High-power AC locomotives, Axle configuration, Rolling contact fatigue, Damage function, Curve, Slope

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