全断面岩石掘进机盘形滚刀的布置与安装优化

发布时间：2018-02-23 19:10

本文关键词： 全断面岩石掘进机盘形滚刀刀具布置数值模拟 ABAQUS　出处：《华北电力大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着大规模地下工程的开展,全断面岩石隧道掘进机(TBM)被广泛地应用于地下隧道工程。盘形滚刀作为TBM破岩的主要工具,消耗量大、成本高,且对全断面岩石掘进机的作业性能有较大影响,所以对盘形滚刀的研究具有十分重要的意义。本文主要从盘形滚刀的布置方法和安装方式两个方面进行分析研究。首先,分析了盘形滚刀的类型、破岩机理以及盘形滚刀的受力预测模型,研究了盘形滚刀受力对刀盘平衡性的影响,计算出刀盘的径向力和倾覆力矩,总结了盘形滚刀在刀盘上的布置原则和不稳定时的调整方案。然后,在满足盘形滚刀布置原则的前提下,提出了盘形滚刀螺旋线布置方法,分析了螺旋线布置对刀盘平衡性的影响,在刀盘布置参数确定的条件下,详细阐述如何实施盘形滚刀螺旋线布置。利用Visual Basic编写了盘形滚刀螺旋线布置优化程序,并将其运用到秦岭隧道工程中引进的国外TB880E机型上,验证了刀具螺旋线布置的可行性和有效性。最后,针对盘形滚刀传统的正安装方式,提出了外倾安装和前倾安装两种新型安装方式。采用ABAQUS有限元软件,对三种安装方式下盘形滚刀的三维破岩过程进行了数值模拟。发现在盘形滚刀滚动破岩过程中,外倾安装时岩石表面应力的最大值普遍小于正安装：前倾安装时刀圈上破岩刃域的侧应力分布优于正安装。验证了外倾安装和前倾安装在某些方面确实比正安装有优势。
[Abstract]:With the development of large-scale underground engineering, full-section rock tunnel tunneling machine TBM is widely used in underground tunnel engineering. As the main tool of TBM rock breaking, the disk-shaped hob is a major tool for breaking rock, which has a large consumption and high cost. And it has great influence on the working performance of the full-section rock roadheader, so it is of great significance to study the disc hob. In this paper, the layout method and installation method of the disc hob are analyzed and studied. This paper analyzes the type of disc hob, the mechanism of rock breaking and the force prediction model of disc hob, studies the influence of the force of disc hob on the balance of cutter head, and calculates the radial force and overturning moment of cutter head. This paper summarizes the arrangement principle of disc hob on the cutter head and the adjustment scheme when it is unstable. Then, under the premise of satisfying the arrangement principle of disc hob, the helical arrangement method of disc hob is put forward. In this paper, the influence of helical arrangement on the balance of cutter head is analyzed, and how to implement helical arrangement of disc hob is described in detail under the condition of determining the arrangement parameters of cutter head. The optimization program of helical layout of disc hob is compiled by Visual Basic. It is applied to the imported foreign TB880E models in Qinling Tunnel Project, which verifies the feasibility and effectiveness of the helix arrangement of the cutter. Finally, aiming at the traditional positive installation mode of the disc hob, In this paper, two new installation methods, extroversion installation and forward tilting installation, are proposed. The 3-D rock breaking process of the three installation modes of the lower disc hob is numerically simulated by using ABAQUS finite element software. It is found that in the process of rolling rock breaking of the disc hob, The maximum stress of rock surface is generally smaller than that of positive installation during extroversion installation, and the lateral stress distribution in the edge region of the edge on the edge of the cutter ring is better than that of the positive installation in the forward dip installation. It is verified that the extroversion installation and the forward dip installation are indeed superior to the positive installation in some aspects.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.3

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