TBM盘形滚刀磨损预测模型

A wear prediction model of disc cutter for TBM

为了研究TBM盘形滚刀破岩过程中的磨损行为,首先通过分析刀具与刀盘的运动规律推导等截面盘形滚刀运动学公式,结合磨粒磨损理论及刀岩接触力学模型建立盘形滚刀磨损预测模型,并利用MATLAB软件开发滚刀磨损量的预测模拟程序。将该模型应用到某引水工程中对滚刀磨损过程进行仿真,得到盘形滚刀的磨损形貌演变规律。研究结果表明:仿真磨损量与实测磨损量随刀位号变化趋势基本一致,刀盘上各个安装位置处仿真预测的滚刀刀圈正面及侧面磨损值与实测值的平均相对误差分别为18%和30%。刀刃逐渐磨损成尖形,所得磨损形态与工程实际观测相吻合。

In order to study the wear behavior of tunnel boring machine （TBM） disc cutters during the process of rock breaking, kinematic formulas of constant-section disc cutter were established through the analysis of motion characteristics between cutter head and disc cutter. The wear prediction model of disc cutter, which was programmed in MATLAB, was built by combining theory of abrasive wear and cutter-rock contact mechanics. The model was applied to simulate the wear process of cutters in a water diversion project. The evolution laws of wear morphology of disc cutters were obtained. The results show that the simulated wear quantity and the measured wear amount are consistent with the changing tendency of the tool position number, and the average relative errors of normal and lateral face wear of the disc cutters are 18% and 30%, respectively. The cutter ring gradually wears to be tip-shaped, which coincided with the actual wear form.