高速动车组停放缸弹簧力值衰减原因分析及试验优化  

Research and Experimental Optimization of Spring Force Attenuation of Parking Brake Cylinder of High-speed Train

作　　者：常程城 李业明 焦标强 刘博 王正杰 CHANG Chengcheng;LI Yeming;JIAO Biaoqiang;LIU Bo;WANG Zhengjie(Locomotive&Car Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Beijing Zongheng Electro-Mechanical Technology Co.,Ltd.,Beijing 100094,China;Xi'an EMU Depot,China Railway Xi'an Group Co.,Ltd.,Xi'an 710018 Shaanxi,China)

机构地区：[1]中国铁道科学研究院集团有限公司机车车辆研究所,北京100081 [2]北京纵横机电科技有限公司,北京100094 [3]中国铁路西安局集团有限公司西安动车段,西安710018

出　　处：《铁道机车车辆》2024年第2期51-60,共10页Railway Locomotive & Car

基　　金：中国铁道科学研究院集团有限公司基金项目(2019YJ014)。

摘　　要：高速动车组检修时发现制动缸的停放制动力输出不足,对停放制动夹钳单元检修时发现,停放弹簧力值的衰减是停放制动缸输出力不足的主要原因。研究发现,停放弹簧力值衰减的主要原因是弹簧应力松弛,而导致弹簧应力松弛的主要因素是弹簧长期处于高应力区工作。为优化弹簧应力松弛表现,提出通过更换材料和工艺的方法降低弹簧高应力区表现。最后,通过应力松弛对比试验对优化方案进行验证,得到改善停放弹簧力值衰减的方法,有效地降低了停放制动夹钳单元的维护成本。During the maintenance of high-speed trains,it is found that the parking brake force output of the brake cylinder is insufficient.During the maintenance of the parking brake caliper unit,it is found that parking spring force attenuation is the main reason for the insufficient output force of the parking brake cylinder.However,the reason for the force attenuation of the parking spring is the spring stress relaxation,and the main factor leading to the spring stress relaxation is that the spring works in the high stress area for a long time.In order to optimize the stress relaxation performance of spring,the method of changing materials and processes was proposed to reduce the performance of high stress area of spring.Finally,through the stress relaxation comparison test,the optimization scheme is verified,and the method to improve the force attenuation of the parking spring is obtained,which effectively reduces the maintenance cost of the parking brake caliper unit.

关 键 词：弹簧 力值衰减 应力松弛 停放制动单元 

分 类 号：U260.35[机械工程—车辆工程]