持续制动条件下摩擦温度对制动性能的影响  

Influence of Friction Temperature on Braking Performance Under Continuous Braking Conditions

作　　者：王鑫 符蓉[1] 高飞[1] WANG Xin;FU Rong;GAO Fei(Engineering Research Center of Continuous Extrusion of Ministry of Education,Dalian Jiaotong University,Dalian Liaoning 116028,China)

机构地区：[1]大连交通大学,连续挤压教育部工程研究中心,辽宁大连116028

出　　处：《润滑与密封》2022年第5期76-80,共5页Lubrication Engineering

基　　金：国家重点研发计划项目(2016YFB0301403);大连市青年科技之星项目(2017RQ135)。

摘　　要：为探讨铜基粉末冶金闸片与钢盘摩擦副持续制动过程中,盘面温度对摩擦性能的影响和摩擦副表面状态,采用铜基粉末冶金和钢盘配对的摩擦副,利用1∶1高速列车制动试验台,在不同速度和压力条件下进行30 s的持续制动试验,测试制动过程中盘面温度和闸片摩擦磨损性能的变化情况,并观察闸片表面状态。试验结果表明:在持续制动过程中,当盘面最高温度低于350℃时,瞬时摩擦因数升高,闸片表面是松散的第三体,表面有剥落坑;当盘面最高温度高于350℃时,瞬时摩擦因数降低,第三体流动性增强,表面形成压实的第三体,出现裂纹;当盘面最高温度超过600℃时,闸片表面出现龟裂纹,摩擦表面发生大面积的剥落,闸片被破坏。In order to investigate the influence of disk surface temperature on friction performance and surface state of friction pair during the continuous braking of friction pair between copper based powder metallurgy brake pad and steel disk,a friction pair paired with copper-based powder metallurgy and steel discs was used,and a 30 s continuous braking test was carried out in a 1 ∶ 1 high-speed train brake test rig under different speed and pressure conditions.The change of the disc surface temperature and the friction and wear performance of the brake pads was tested during the braking process,and the surface state of the brake pads was observed.The test results show that during continuous braking,when the maximum temperature of the disc surface is lower than 350 ℃,the instantaneous friction coefficient increases,the brake pad surface is a loose third body,and there are spalling pits on the surface.When the maximum temperature of the disc surface is higher than 350 ℃,the instantaneous friction coefficient is reduced,the fluidity of the third body is enhanced,and a compact third body is formed on the surface,and cracks appear.When the maximum temperature of the disc surface exceeds 600 ℃,a tortoise crack appears on the surface of the brake pad,large-area peeling occurs on the friction surface,and the brake pad is damaged.

关 键 词：持续制动 制动性能 摩擦因数 第三体 

分 类 号：TH171.1[机械工程—机械制造及自动化]