车轮扁疤对高速列车传动齿轮动态特性影响
陈光圆
Influence of Wheel Flat Scars on High-speed Train Transmission Geer Dynamic Characteristics
CHEN Guangyuan
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作者信息:柳州铁道职业技术学院运输管理学院，545616，柳州
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Affiliation:School of Transportation Management, Liuzhou Railway Vocational and Technical College, 545616, Liuzhou, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2024.07.006
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中图分类号/CLCN:U270.33
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栏目/Col:学术专论
摘要:
［目的］车轮扁疤会引起列车传动齿轮振动加剧，因此有必要研究车轮扁疤对高速列车传动齿轮的振动动态特性影响。［方法］基于多体动力学理论和某高速列车传动齿轮的技术参数，构建弯曲-扭转-轴向耦合斜齿轮和车轮扁疤的高速列车整车动力学模型；对不同扁疤长度下，高速列车传动齿轮的动态特性，大、小齿轮接触面间的最大接触应力，以及齿轮传递误差进行了计算与分析。［结果及结论］当车轮扁疤长度为0~30mm时，高速列车大、小齿轮的振动加速度增长不明显；当车轮扁疤长度为30~60mm时，高速列车大、小齿轮的振动加速度急剧增加，大、小齿轮间的最大接触应力由630MPa增加至了1250MPa，增长了2.08倍；随着车轮扁疤长度的增加，齿轮动态传递误差呈现增加的趋势；当车轮扁疤长度为0时，齿轮动态传递误差最大值为9μm；当车轮扁疤长度为60mm时，齿轮动态传递误差最大值为72μm，齿轮传递误差增加了8倍。
Abstracts:
［Objective］ Wheel flat scars can exacerbate the vibration of train transmission gears. Therefore, it is necessary to study the impact of wheel flat scars on the vibrational dynamic characteristics of high-speed train transmission gears. ［Method］ Based on multi-body dynamics theory and transmission gear technical parameters of a certain high-speed train, a dynamic model of the entire high-speed train, including coupled helical gears in bending-torsional-axial direction and wheel flat scars, is constructed. For flat scars of different lengths, the dynamic characteristics of high-speed train transmission gears, the maximum contact stress between large and small gear contact surfaces, and gear transmission errors are calculated and analyzed. ［Result & Conclusion］ When the lengths of wheel flat scar range from 0 to 30 mm, the vibration acceleration of large and small gears in high-speed train increases insignificantly; when the above lengths range from 30 to 60 mm, the vibration acceleration increases sharply, and the maximum contact stress between large and small gears increases from 630 MPa to 1 250 MPa, doubling by 2.08 times. As the length of wheel flat scars increases, the dynamic gear transmission error shows an increasing trend. When the length is 0, the maximum value of gear dynamic transmission error is 9 μm，and when the length is 60 mm, the maximum gear dynamic transmission error is 72 μm, increasing by 8 times.
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