TBM分体式刀座系统设计方法及力学性能分析

硬岩隧道掘进机(TBM)通过刀盘上的滚刀破碎剥离岩石开挖,刀座系统是连接滚刀与刀盘之间的桥梁,其联接可靠性和承载能力性能好坏直接关系到设备开挖效率及施工维护成本,刀座系统设计理论及标准的缺乏已无法满足TBM安全、高效发展需求。总结刀座系统的结构设计基本原则,基于系统受载特性分析及轴式滚刀基本结构尺寸,建立了分体式刀座和整体式刀座的结构参数化设计方法。通过对轴式滚刀-刀座系统进行静力学建模,分析额定负载工况、不同螺栓预紧力下、不同工作载荷下的静力学特性,找出了各类刀座的应力分布特性、危险区域,揭示了工程中刀座部分区域开裂、压溃现象的力学原因。此研究可为工程中刀座优化设计提供参考。

Design Method and Mechanical Property Analysis of TBM Split-body Cutter Housing System

Hard rock tunnel boring machine (TBM) is excavated by breaking and stripping the rock through the cutters on the cutterhead. The cutter housing system is the bridge between the cutter and the cutterhead, and its connection reliability and bearing capacity are directly related to the equipment excavation efficiency and construction maintenance cost. Due to the lack of design theory and standard of cutter housing system, it has been unable to meet the needs of safe and efficient development of TBM. The basic principles of the structure design of the cutter housing system were summarized.Based on the loading characteristics analysis and the basic structure size of the cutter housing system, the structural parametric design methods of the cutter and cutter housing system were established. Through the static modeling of the cutter and cutter housing system, the static characteristics under rated load condition, different bolt preload and different working load were analyzed. The stress distribution characteristics and dangerous areas of cutter housing were found out, and the reasons for the cracking and crushing phenomenon in cutter housing were revealed.This study provides reference for the optimal design of cutter housing system in engineering.