摘要
利用1∶1台架试验探究了250 km/h城际动车组闸片-盘紧急制动过程中的摩擦及噪声特性。结果表明当速度为50~250 km/h时,摩擦系数受制动速度增长影响较小,而制动压力的增加仅在250 km/h时诱导摩擦系数下降,表明该型闸片具有优异的摩擦系数稳定性。对于噪声特征,5000 Hz以下的噪声占主导地位,而更高频噪声只出现在某些特定的频率段。制动速度的增加会增加制动初期的噪声强度和频率范围,而压力提高则带来相反的抑制作用。高制动压力会促使制动后期高频啸叫的产生。因此,在制动时采用先高压力后低压力的变压力制动方式可能是降低高频制动噪声的方法。
This work explores the tribological and noise characteristics of the brake pad-disc braking process of the intercity EMU at a speed grade of 250 km/h on a full-scale dynamometer.The results show that within the range of 50~250 km/h,the friction coefficient is less affected by the increase of braking speed.However,the braking pressure only promotes a decrease in the friction coefficient at a speed of 250 km/h,indicating that this type of brake pad has excellent friction coefficient stability.In terms of noise,noise with frequencies below 5000 Hz dominates,while higher frequency noise only occurs in certain specific frequency bands.The increase in braking speed increases the noise intensity and frequency range in the early stages of braking,while the increase in pressure has the opposite inhibitory effect.High braking pressure will promote the generation of high-frequency squeal in the later stages of braking.Therefore,using a variable pressure braking method with high pressure followed by low pressure during braking may be a method to reduce high-frequency braking noise.
作者
龙波
陈刚
余程巍
程景琳
王林波
张鹏
章林
秦明礼
曲选辉
LONG Bo;CHEN Gang;YU Chengwei;CHENG Jinglin;WANG Linbo;ZHANG Peng;ZHANG Lin;QIN Mingli;QU Xuanhui(Beijing Tianyishangjia New Material Co.,Ltd.,Beijing,102402,China;Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China;Beijing Advanced Innovation Center for Materials Genome Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《现代交通与冶金材料》
CAS
2024年第1期66-74,共9页
Modern Transportation and Metallurgical Materials
基金
国家自然科学基金资助项目(52204369)。
关键词
动车组闸片
制动条件
摩擦
噪声
brake pads
braking conditions
friction
noise
作者简介
第一作者:龙波(1987−),男,学士。研究方向:动车组制动闸片材料;通讯作者:张鹏(1993−),男,博士,副研究员。研究方向:粉末冶金铜基复合材料。
