采煤机用水介质液压盘式制动器摩擦材料的选用  

Selection of Friction Materials for Water Medium Hydraulic Brake for Coal Mining Machines

作　　者：周新建[1] 位凯涛 ZHOU Xinjian;WEI Kaitao(School of Mechanical Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)

机构地区：[1]西安科技大学机械工程学院,陕西西安710054

出　　处：《热加工工艺》2023年第24期111-114,120,共5页Hot Working Technology

基　　金：西安市碑林区应用技术研发项目(GX1813)。

摘　　要：针对水介质液压制动器摩擦材料的选用问题,阐述了材料的摩擦磨损机理;选用了应用广泛的铁镍合金粉末、铜基冶金粉末以及GrMnFeCoNi系高熵合金三种摩擦材料,综合考虑到采煤机的实际工况,设定紧急制动时间为0.7 s时,利用工程有限元对选用的三种摩擦材料进行热结构耦合及制动过程位移变形量进行分析。结果表明:当摩擦材料为铁镍合金粉末时,其制动盘最高温度为263.16℃,最大变形量为8.3921 mm;当摩擦材料为铜基冶金粉末时,其制动盘内最高温度为220.9℃,最大变形量为9.0192 mm;当摩擦材料为GrMnFeCoNi系高熵合金时,其制动盘内最高温度为194.29℃、最大变形量为7.554 mm。通过对比,确定GrMnFeCoNi系高熵合金为最优摩擦材料。Aiming at the problem of selecting friction material for water medium hydraulic brake,the friction and wear mechanism of the materials was described.The three kinds of friction material was choosen,such as the widely used iron nickel alloy,copper base powder metallurgical powder and GrMnFeCoNi high entropy alloys.Considering the actual working condition of the shearer,the emergency braking time is set at 0.7 s,the thermal structural coupling and the displacement deformation of the three friction materials were analyzed by using the engineering finite element method.The results show that when the friction material is iron nickel alloy powder,the the highest temperature of brake disc is 263.16℃,the maximum amount of the deformation is 8.3921 mm.When the friction material is copper base powder metallurgy,the the highest temperature of the brake disc is 220.9℃,the maximum amount of deformation is 9.0192 mm.When the friction material is GrMnFeCoNi series high entropy alloys,the highest temperature of the brake disc is 194.29℃,the maximum amount of deformation is 7.554 mm;By contrast,it is determined that GrMnFeCoNi series high-entropy alloys is the best friction material.

关 键 词：水介质液压制动器 摩擦磨损 摩擦材料 有限元 

分 类 号：TG115[金属学及工艺—物理冶金]