TBM滚刀破岩试验台设计与分析

摘要

The double disc cutter test bed with adjustable spacing is designed to solve cutter disc design problems of full face rock tunnel boring machine (TBM).Three granites uniaxial loading breaking were experimented to attained breaking force by pressure tester.The effect of loading rate on breaking force was analyzed.The pressure force and move speed of test bed were determined to be designed the double disc cutters test bed based on experimental results.The main parts structures of test bed were explained.The main stress parts were analyzed by finite element method.The manufacture,assembly,debugging of the test were completed and the rock breaking experiments were done.The breaking force of three granites was in 108 ～ 300 kN in one-way rock brecking test.The stress analysis of the core component is less than the allowable stress of the material,and the force in the rock breaking process is within the design permit.The test bed can meet the requirement of rock rolling test in the design of Hard Rock Roadheader.%目的 设计可调整间距的双滚刀破岩试验台,解决全断面硬岩掘进机(TBM)刀盘设计时所需滚刀破岩最佳刀间距与贯入度等相关数据问题.方法 利用压力机对3种典型花岗岩在不同加载速率下进行了单向加载的破碎试验,确定了岩石破碎力并分析了加载速率对岩石破碎力的影响;基于试验结果确定了滚刀试验台的受力、运动速度等设计参数并进行了双滚刀综合试验台的结构设计,对设计的刀具系统、工作台、刀具调节等核心部件的结构及工作原理进行了说明;对试验台的主要受力部件进行了有限元受力分析.结果 完成了试验台的制造、装配和调试,利用试验台进行了花岗岩的滚压破碎试验.3种花岗岩单向破岩试验的破碎力在180～300 kN,核心部件的应力分析结果小于材料的许用应力,破岩过程中的受力在设计许可范围内.结论 试验台可以满足硬岩掘进机设计时所需的岩石滚压试验要求.