【摘要】 研究目的:刀盘位于全断面隧道掘进机的最前端,工况恶劣,刀盘刀具磨损严重,是刀盘失效的主要原因。本文应用离散元分析方法对刀盘面板的磨损进行模拟仿真,并对磨损大小进行定量分析;通过对刀盘面板进行分区,研究面板的磨损规律;开展刀盘面板的堆焊结构优化设计,提出米字形堆焊的面板结构。研究结论:(1)刀盘面板滚刀分布密集区及出渣槽区域附近的面板磨损较为严重,易发生磨损激增;(2)优化后的新刀盘面板结构平均磨损量较原刀盘面板下降了近25%,优化后的刀盘面板耐磨特性得到明显提升,新刀盘面板结构固有频率较原刀盘面板更远离其工作频率,工作更加安全;(3)本文研究可为刀盘磨损的计算提供方法指导,优化的耐磨结构可应用于修复磨损严重的刀盘。更多还原

【Abstract】 Research purposes: The cutter head is located at the front end of the full-section tunnel boring machine.The working conditions are bad and the cutter head is severely worn,which is the main reason for the failure of the cutter head. In this paper,the discrete element analysis method is used to simulate the wear of the cutter head faceplate,and the wear size is quantitatively analyzed; through partitioning the cutter head faceplate,the wear rule of the faceplate is studied. The surfacing structure optimization design of the cutter head panel is carried out,and the m-shaped surfacing panel structure is proposed.Research conclusions:( 1) The wear of the faceplate near the densely distributed area of the cutter head faceplate hob and the ballast groove area is more serious,and it is prone to a sharp increase in wear.( 2) The average wear of the optimized new cutter head faceplate structure is reduced by nearly 25% compared with the original cutter head faceplate.The optimized cutter head panel has significantly improved wear resistance. The natural frequency of the new cutter head panel structure is farther away from its working frequency than that of the original cutter head panel,and the work is safer.( 3) The research result can provide method guidance for the calculation of cutter head wear. The optimized wear-resistant structure can be used to repair severely worn cutter heads.更多还原