轨道车辆制动软管力学性能试验研究  

An Experimental Study of Mechanical Properties of Rail Vehicle Brake Hoses

作　　者：宋青鹏 马捷 姜丰 肖合婷 沈超 陈善求 周伟[2,3] SONG Qing-peng;MA Jie;JIANG Feng;XIAO He-ting;SHEN Chao;CHEN Shan-qiu;ZHOU Wei(CRRC Qingdao Sifang Co Ltd,Qingdao 266111,China;School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China;Key Laboratory of Traffic Safety on Track(Central South University),Ministry of Education,Changsha 410075,China;Goldcup Electric Apparatus Co Ltd,Changsha 410205,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛100070 [2]中南大学交通运输工程学院,湖南长沙410075 [3]中南大学轨道交通安全教育部重点实验室,湖南长沙410075 [4]金杯电工股份有限公司,湖南长沙410205

出　　处：《五邑大学学报（自然科学版）》2024年第3期13-20,共8页Journal of Wuyi University(Natural Science Edition)

基　　金：国家重点研发计划资助项目(2022YFB4300304);高新技术产业科技创新引领计划(2021GK4032)。

摘　　要：制动软管是轨道车辆空气制动系统的重要组成部件,起到传递和存储制动风压的重要作用,其工作性能直接影响轨道车辆的制动安全.为此,本文针对地铁车辆典型软管结构开展了涵盖拉伸与弯曲力学性能的试验研究,通过对软管结构进行横向、纵向标准取样,对试样的初次断裂应力、二次断裂应力与拉伸伸长率等力学参数进行了对比分析;通过设计适用于不同尺寸规格的圆盘量具,测量并评估了不同规格软管在不同弯曲半径下的椭圆短径与外径变化率,确定了制动软管实车使用及扭转疲劳试验的最佳软管长度.研究成果为轨道车辆制动空气软管的设计选型和试验评估提供了科学依据和技术支撑.The braking hose is an important component of railway vehicle braking systems.The brake hose works as an important part for transmitting and reserving wind pressure,and its performance directly affects railway vehicles’braking safety.In view of this,this paper carried out an experimental study on the tensile and bending mechanical properties of the typical hose structure of subway vehicles.Through the transverse and longitudinal standard sampling of the hose structure,the mechanical parameters such as the primary fracture stress,secondary fracture stress and tensile elongation of the sample were compared and analyzed.By designing a disc measuring tool suitable for different sizes,measuring and evaluating the change rate of elliptic short diameter and outer diameter of different sizes of hose under different bending radius,the optimal hose length for real use and torsional fatigue test of brake hose is determined.The research results provide scientific basis and technical support for the design,selection and test evaluation of brake air hoses for rail vehicles.

关 键 词：轨道车辆 制动软管 拉伸性能 弯曲性能 

分 类 号：U279.3[机械工程—车辆工程]