
加工技术与机床
机电工程技术2017年第46卷第08期
DOI: 10.3969 /j.issn.10099492.2017.08. 004
不落轮床轴向定位液压系统的设计
廖传培
(广州地铁集团有限公司,广东广州
511430
摘要:广州地铁四号线的列车是采用直线电机牵引系统,列车的本身结构就没有变速箱,具有转弯半径小的优点,其列车的轮对相对于其他机车的直径要小。四号线列车在运行过程中经常出现转向架震动异响现象,长久使用,发现其策修后的轮对出现了台阶现象,这严重影响到了轮对的错修质量,也直接影响到列车的正常运营,为此对链床各方面研究分析,确定了其产生故
障现象的原固为轴向定位不审并结合实际情况,
提出了改造方案,在不落轮床上限定轮对的轴向位移,以确保嵌修的安全,
在镜床液压系统的基础上,设计新增加一条液压回路,利用两个轴向油缸,再加两个小的靠轮,用来靠轮对的轮缘,限制车
轮的左右移动,使其在轮对链修过程中不能产生位移,保证其轴向定位的可靠关键调:震动异响:台阶;轴向定位;液压系统
中图分类号:TG659
文献标识码:A
文章编号:10099492(2017)08001204
Design of Underfloor Wheel LatheHydraulic AxialPositioning System
LIAO Chuanpei
(Guangzhou Metro Group Co.,Ltd.,Guangzhou511430,China)
Abstract: Guangzhou metro 4th line train is a linear motor traction system, the train itself has no gearbox structure, with the advantages of small turning radius, the train wheel relative to the diameter of other locomotives to be small. The train during operation often appear bogie vibration noise, it is found that after the wheelset lathing steps appeared phenomenon, the serious influence to the quality of wheelset lathing, and directly affect the normal operation of the train, so to solve this step phenomenon is imminent. Therefore the study of lathe analysis, the reason of the failure phenomenon is determined, the axial positioning is not strong, Combined with actual situation, proposed the reform plan, the underfloor wheel lathe bed must limit the axial displacement of the wheel, in order to ensure the safety of lathing - based on the lathe of the hydraulic system, a design of the new hydraulic cireuit using two axial eylinder, with two small wheels used to live on the wheel rim, to limit the wheel moving around, resulting in displacement of wheelset lathing proxcess can ensure the reliable axial positioning-
Key words: vibration abnormal sound; step axial; axial position; hydraulic system 1设计要求
在不落轮能床上必须限定轮对的轴向位移,以确保镜修的安全,在原有的液压系统的基础上,设计新增加一条液压回路,利用两个轴向油缸,加两个小的靠轮,用来靠住轮对的轮缘,限制车轮的左右移动,使其在轮对能修过程中不能产生位移,保证其轴向定位的可靠。设计整改方案简图如图1。
2该液压系统工况分析和参数确定
此液压系统工作要求,需要伸出顶住(夹紧)和松脱两个功能。
(1)通过设计改造后的液压系统(回路)实现的工作要求是:
收稿日期:20170210 万方数据
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图1
轴向油缸