摘要
尼龙衬套作为制动夹钳单元的传动部件,承担着负载受力、减磨与抗磨等作用。目前,国内轨道车辆制动夹钳单元基本上采用进口产品。为了打破垄断,进行自主化开发与研制标准地铁制动夹钳单元尼龙衬套,利用纤维增强、PTFE微粒共混填充、液体油处理等工艺方法,制成不同配方的改性尼龙材料。以重点提升改进尼龙材料的吸水性能、摩擦磨损性能、机械性能等对制动夹钳单元影响较大的物理参数为目标,通过对比测试不同配方改性尼龙试样的物理机械性能参数,设计、开发、研制了满足运用要求的改性尼龙材料。进行了标准地铁制动夹钳单元两种常用不同规格的衬套试样在高低温环境下的尺寸变化试验,研究衬套与金属件过盈配合的可行性,为衬套尺寸合理的公差设计提供理论依据。
As the transmission part of brake caliper unit,nylon bushing bears the functions of load force,anti-friction and anti-wear.At present,the brake caliper unit of domestic rail vehicle basically adopts imported products.In order to break the monopoly,and independently develop the brake caliper unit nylon bushing of standard metro.In this paper,modified nylon materials with different formulations are prepared by using fiber reinforced,PTFE particle blending and filling,liquid oil treatment and other processing method.In order to focus on improving the water absorption,friction and wear properties,mechanical properties and other physical parameters of the improved nylon material that have a greater impact on the brake caliper unit,the modified nylon material that meets the application requirements is designed and developed by comparing and testing the physical and mechanical properties of modified nylon samples with different formulations.Under the high and low temperature environment,the size change test of two kinds of commonly used bushing samples with different specifications in standard metro brake caliper unit is carried out.The feasibility of interference fit between bushing and metal parts is studied,which provides theoretical basis for reasonable tolerance design of bushing dimension.
作者
徐少亭
李新康
孔德鹏
王震
刁有彬
夏炎
XU Shaoting;LI Xinkang;KONG Depeng;WANG Zhen;DIAO Youbin;XIA Yan(Brake Business Department of CRRC Braking System Co.,Ltd.,Qingdao 266031,China;Nanjing Comptech Composites Co.,Ltd.,Nanjing 211162,China)
出处
《智慧轨道交通》
2022年第6期50-55,共6页
SMART RAIL TRANSIT
关键词
标准地铁
制动夹钳单元
尼龙衬套
材料改性
机械性能测试
尺寸变化研究
standard metro
brake caliper unit
nylon bushing
material modification
mechanical performance test
dimension change research
