TBM刀盘滚刀布置对倾覆力矩的影响规律

Influence pattern of TBM cutter arrangement on cutterhead overturning moment

综合考虑刀盘重力、刀具位置和倾角以及刀盘旋转角度因子,建立单把滚刀受载产生的力矩模型;基于单、双螺旋线刀具布置特征,建立不同刀具布置形式下的刀盘倾覆力矩模型,为刀具优化布置提供理论依据;分析3个直径为8 m级刀盘的刀具布置规律,计算中心滚刀、正滚刀、边滚刀这3个布刀区域的倾覆力矩,对比3个刀区倾覆力矩产生差异的原因。研究结果表明:对称双螺旋线起始位置相差角度对滚刀布置引起的倾覆力矩有影响;调整8把边滚刀的安装角度,刀具布置引起的倾覆力矩相应减少0.64 MN∙m,总倾覆力矩减少21.4%,验证了TBM滚刀布置方法的正确性。

Taking cutters position and inclination,the gravity and rotation angle of cutterhead into consideration,the torque mathematical model generated by the single cutter was established.Based on the arrangement features of single and double spiral line,the overturning moment model with different cutter arrangements was proposed to provide a theoretical basis for the optimal layout of cutters.The layout law of three cutterheads with the diameter of 8 m was analyzed,the overturning moments of central cutters,normal cutters and edge cutters were calculated.The reasons for the difference in overturning moments of three regions were explained.The results show that the difference angle of the starting position of the symmetrical double helix has effect on the overturning moment caused by the hob arrangement.Through adjusting eight edge hobs,the overturning moment caused by cutters is reduced by 0.64 MN∙m,while the total overturning moment is reduced by 21.4%,which verifies the correctness of TBM hob arrangement method.