基于LabVIEW的滚压破岩模拟试验机研制

Development of Rock Breaking Simulation Testing Machine Based on LabVIEW

为考察不同环境工况下TBM滚刀的破岩特性,研制了一台小型滚压破岩模拟试验机。该试验机采用模块化设计,主要由基体及动力执行模块、数据采集模块、介质流率与温度控制模块三部分组成。其中,基体及动力执行模块主要包含试验机基体、加载主轴、滚刀夹具和岩石夹具,用来支撑试验装置和提供动力;基于LabVIEW的数据采集模块(力信号监测与分析系统)可在试验过程中实时显示和存储滚刀试样的法向力、滚动力、侧向力和摩擦系数数据;介质流率与温度控制模块由精密恒流蠕动泵、温度控制器和加热负载组成,用于试验过程中介质溶液的引入和温度保持。试验机的滚刀安装半径、介质环境、法向载荷、运动速率和时长等工况参数均可调。滚刀/大理岩在25℃去离子水介质工况下两种法向载荷作用的滚动摩擦磨损试验结果表明,该试验机可开展TBM滚刀在不同温度介质环境下的滚压破岩模拟试验。

In order to investigate the rock-breaking characteristics of TBM cutters under different environmental conditions,a small rock-breaking simulation testing machine is designed and developed in this paper.The testing machine is designed based on modular design methodology and is mainly composed of three parts:the base body and power execution module,the data acquisition module,and the medium flow and temperature control module.The base body and power execution module mainly includes the base body of the testing machine,the loading spindle and related fixtures,which are used to support the components of the testing machine and provide power.The data acquisition module based on LabVIEW(the force signal monitoring and analysis system)can display and store the normal force,rolling force,lateral force,and friction coefficient data of the cutter sample in real time during the testing process.The medium flow and temperature control module is mainly composed of a precise peristaltic pump with controllable flow,a temperature controller,and a heating device,which are used to introduce the medium solution and maintain the medium temperature during the experiment.The operating parameters of the testing machine allows for adjustable parameters such as the installation radius,medium environment,normal force,rotating angular,velocity and duration of the cutter.The cutter/marble rolling friction and wear test results under two normal loads at 25℃in deionized water show that the testing machine can conduct rock-breaking simulation tests of TBM cutters under the medium environments with different temperature.