基于滚刀Cerchar磨蚀性指数的滚刀磨损量预测方法  

Study of a prediction method for cutter wear based on cutter cerchar abrasivity index

作　　者：齐梦蕾 朱强[1] 杨延栋 范文超 秦东晨[1] 贾连辉 QI Menglei;ZHU Qiang;YANG Yandong;FAN Wenchao;QIN Dongchen;JIA Lianhui(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China;State Key Laboratory of Shield Machine and Boring Technology,Zhengzhou 450001,China;China Railway Engineering Equipment Group Tunnel Equipment Manufacturing Co.,Ltd.,Zhengzhou 450016,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450001 [2]盾构及掘进技术国家重点实验室,郑州450001 [3]中铁工程装备集团有限公司,郑州450016

出　　处：《重庆理工大学学报（自然科学）》2024年第11期112-118,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：河南省科技攻关项目(232102320242);河南省重大科技专项项目(231100220700)。

摘　　要：为探究正常磨损机制下的滚刀磨损特性及对滚刀磨损量进行预测,根据盘形滚刀实际几何尺寸制作了比例为1∶10的缩尺滚刀,使用SP3-I滚刀复合磨蚀实验平台开展6种硬度刀具的滚刀旋转磨蚀试验,分析滚刀硬度对滚刀磨损量的影响规律。利用ATA-IGG I类岩石磨蚀伺服实验仪器进行不同硬度滚刀的Cerchar磨蚀试验,引入滚刀Cerchar磨蚀性指数,通过滚刀Cerchar磨蚀试验测得滚刀CAI(cerchar abrasivity index)值,基于滚刀CAI值提出了基于滚刀Cerchar磨蚀性指数的滚刀磨损量预测方法。结果表明:不同硬度滚刀在同种岩石条件下,其滚刀磨损量随着滚刀硬度增大呈现出先减小后增大的趋势,对于同一种岩石类型,存在一个最佳的刀具硬度区间,使用该硬度范围的滚刀可以提高施工效率;依据滚刀CAI值及其滚刀千米磨损量之间的拟合曲线,得出当前工况下花岗岩、砂岩、玄武岩中的滚刀磨损量计算公式,选取单一滚刀在花岗岩中进行旋转磨蚀试验,通过验证对比,该预测方法得出的预测磨损量与实际磨损量的平均误差在10%以内。The Full Face Hard Rock Tunnel Boring Machine(Tunnel Boring Machine)is large-sized construction equipment widely used in tunnel excavation.The disc cutter directly contacts and cuts the rock in the tunneling process.The wear rate of the disc cutter significantly affects the working efficiency and safety of the tunnel boring machine.To explore the disc wear characteristics under the normal wear mechanism and predict the cutter wear,we made a scale cutter with a proportion of 1:10 according to the actual geometric size of cutter.The cutter rotational abrasion tests of six kinds of hardness cutters were conducted by employing the SP3-I cutter compound wear experimental platform and the impact of cutter hardness on cutter wear was analyzed.On this basis,the Cerchar abrasion test of different hardness cutters were performed by using ATA-IGG I rock abrasion servo experimental instrument,and the cutter Cerchar abrasion index was introduced.The cutter CAI(Cerchar Abrasivity Index)value is measured by cutter Cerchar abrasion test.Based on the cutter CAI value,we propose a cutter wear prediction method based on cutter Cerchar abrasivity index.Our results show:1.under the same rock condition,the cutter wear of different hardness cutters decreases first and then increases with the rise of hardness.For the same rock type,there is an optimal range of cutter hardness.Employing a cutter within hardness range improves the work efficiency;2.according to the fitting curve between cutter CAI value and kilometer wear,the calculation formula of cutter wear in granite,sandstone and basalt under current working conditions is obtained,and a single cutter is used for rotary wear test in granite.Through verification and comparison,the average error between the predicted wear and the actual one is less than 10%.

关 键 词：磨蚀性指数 滚刀旋转磨蚀试验 缩尺滚刀 滚刀磨损预测 预测方法 

分 类 号：U239.5[交通运输工程—道路与铁道工程] U455.3[建筑科学—桥梁与隧道工程]