基于机电液耦合的钢轨打磨模型  

Rail Grinding Model Based on Mechanical-Electric-Hydraulic Coupling

作　　者：曾鲁庆 崔大宾[1] 李立[1] ZENG Luqing;CUI Dabin;LI Li(School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China;School of Intelligent Manufacturing,Chengdu Technological University,Chengdu 610031,China)

机构地区：[1]西南交通大学机械工程学院,四川成都610031 [2]成都工业学院智能制造学院,四川成都610031

出　　处：《西南交通大学学报》2025年第2期364-373,共10页Journal of Southwest Jiaotong University

基　　金：四川省科技计划(2021YJ0026)。

摘　　要：钢轨打磨发生在钢轨打磨车行驶过程中,会受到钢轨打磨车动力学性能的影响.钢轨打磨一般设置为恒功率打磨,涉及砂轮钢轨接触关系、砂轮钢轨磨削关系、液压系统、控制系统等,是一个机电液耦合过程.在考虑机电液耦合的钢轨打磨过程中,基于车辆轨道耦合动力学,建立机电液耦合的钢轨打磨整体模型,包含车辆轨道耦合动力学子模型、砂轮钢轨接触子模型、磨削子模型、液压系统子模型;通过与已有的实验数据对比,对该钢轨打磨模型进行验证.研究结果表明:车辆轨道动力学模型验证时,脱轨系数最大误差为11.11%,轮重减载率最大误差为7.69%,轮轴横向力最大误差为11.68%;液压控制模型验证时,在0.7 Hz与1.7 Hz波磨下,无杆腔压力偏差率分别为-2.96%~2.92%、-0.32%~1.38%,无杆腔流量偏差率为-24.11%~0、-48.72%~0;磨削模型验证时,整体趋势一致,最大偏差点处偏差量为0.036 mm;以上偏差均在可接受范围内,此模型能应用于实际的钢轨打磨研究中.Rail grinding occurs when the rail grinder is in traveling status,which is affected by the dynamic performance of the vehicle.Rail grinding is generally set as constant power grinding,involving a wheel-track contact relationship,wheel-track grinding relationship,hydraulic system,and control system.It is a mechanicalelectric-hydraulic coupling process.The whole model of rail grinding based on mechanical-electric-hydraulic coupling was formed by considering the mechanical-electric-hydraulic coupling of the rail grinding process on the basis of vehicle-track coupling dynamics.This model included a vehicle-track coupling dynamics submodel,wheel-track contact submodel,grinding submodel,and hydraulic system submodel.This rail grinding model was validated by comparing it with experimental data.The results show that in vehicle-track dynamics model verification,the maximum deviation of derailment coefficient is 11.11%,and the maximum deviation of wheel unloading rate is 7.69%.The maximum deviation of the lateral force of the wheel is 11.68%.In hydraulic and control model verification,under 0.7 Hz and 1.7 Hz rail corrugation,the deviation range of pressure in the rodless cavity are between(-2.96%-2.92%)and(-0.32%-1.38%),and the deviation range of flow in the rodless cavity are between(-24.11%-0)and(-48.72%-0).In grinding model verification,the trend is generally consistent,with a deviation of 0.036 mm at the point of maximum deviation.The above deviations are all within the acceptable range,proving that this model can be applied to practical rail grinding study.

关 键 词：钢轨打磨 动力学性能 机电液耦合 PID控制 赫兹接触 

分 类 号：U216.65[交通运输工程—道路与铁道工程]