Advancing high-speed train gearbox durability: enhanced bearing load and contact stress through transition from helical to herringbone gears

IF 4.4 1区 工程技术 Q2 TRANSPORTATION SCIENCE & TECHNOLOGY Railway Engineering Science Pub Date : 2024-08-07 DOI:10.1007/s40534-024-00345-5
Hao Wu, Jing Wei, Pingbo Wu, Fansong Li, Yayun Qi
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Abstract

High-speed trains typically utilize helical gear transmissions, which significantly impact the bearing load capacity and fatigue service performance of the gearbox bearings. This paper focuses on the gearbox bearings, establishing dynamic models for both helical gear and herringbone gear transmissions in high-speed trains. The modeling particularly emphasizes the precision of the bearings at the gearbox’s pinion and gear wheels. Using this model, a comparative analysis is conducted on the bearing loads and contact stresses of the gearbox bearings under uniform-speed operation between the two gear transmissions. The findings reveal that the helical gear transmission generates axial forces leading to severe load imbalance on the bearings at both sides of the large gear, and this imbalance intensifies with the increase in train speed. Consequently, this results in a significant increase in contact stress on the bearings on one side. The adoption of herringbone gear transmission effectively suppresses axial forces, resolving the load imbalance issue and substantially reducing the contact stress on the originally biased side of the bearings. The study demonstrates that employing herringbone gear transmission can significantly enhance the service performance of high-speed train gearbox bearings, thereby extending their service life.

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提高高速列车齿轮箱的耐久性:通过从螺旋齿轮到人字齿轮的过渡,增强轴承载荷和接触应力
高速列车通常采用斜齿轮传动,这对齿轮箱轴承的承载能力和疲劳服役性能有很大影响。本文以齿轮箱轴承为重点,建立了高速列车斜齿轮和人字齿轮传动的动态模型。建模时特别强调了齿轮箱小齿轮和齿轮的轴承精度。利用该模型,对两种齿轮传动装置在匀速运行下的轴承载荷和齿轮箱轴承的接触应力进行了比较分析。研究结果表明,斜齿轮传动产生的轴向力导致大齿轮两侧轴承的负载严重失衡,并且这种失衡随着列车速度的增加而加剧。因此,这会导致一侧轴承的接触应力显著增加。采用人字齿轮传动可有效抑制轴向力,解决载荷不平衡问题,并大幅降低原本偏置一侧轴承的接触应力。研究表明,采用人字齿轮传动可显著提高高速列车齿轮箱轴承的服务性能,从而延长其使用寿命。
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来源期刊
Railway Engineering Science
Railway Engineering Science TRANSPORTATION SCIENCE & TECHNOLOGY-
CiteScore
10.80
自引率
7.90%
发文量
1061
审稿时长
15 weeks
期刊介绍: Railway Engineering Science is an international, peer-reviewed, and free open-access journal that publishes original research articles and comprehensive reviews related to fundamental engineering science and emerging technologies in rail transit systems, focusing on the cutting-edge research in high-speed railway, heavy-haul railway, urban rail transit, maglev system, hyperloop transportation, etc. The main goal of the journal is to maintain high quality of publications, serving as a medium for railway academia and industry to exchange new ideas and share the latest achievements in scientific research, technical innovation and industrial development in railway science and engineering. The topics include but are not limited to Design theory and construction technology System dynamics and safetyElectrification, signaling and communicationOperation and maintenanceSystem health monitoring and reliability Environmental impact and sustainabilityCutting-edge technologiesThe publication costs for Railway Engineering Science are fully covered by Southwest Jiaotong University so authors do not need to pay any article-processing charges.
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