硬岩掘进机截齿与齿座的有限元分析
摘 要: 为了明确硬岩掘进机截齿与齿座的受力和应力分布情况,确定其损坏原因,通过MATLAB软件模拟单个截齿载荷,利用ANSYS对单个截齿及齿座进行有限元分析。研究表明:单个截齿的受力随切屑厚度的变化而变化,截齿位置角在π/2处截齿所受的各向载荷最大。截齿的最大变形发生在刀头部位,齿座的最大变形发生在齿座前部。根据研究结果,有针对性地采取措施,可进一步减少截齿及齿座损坏,延长其使用寿命。
关键词: 掘进机; 截齿; 齿座; ANSYS; 应力
Abstract: This paper is an effort to investigate forced situation and stress distribution of a p ick and
its holder on a hard roadheader and determine the causes of their damage. The paper introduces the simu2
lation of a single p ick load bymeans ofMATLAB and finite element analysis of the p ick and its holder by
using of ANSYS. The results show that forces on a single p ick change with the thickness of chip, and all
forces reache maximum when the position angle reachesπ/2. The largest p ick deformation occurs in parts
of tool bit and the biggest tooth holder deformation occurs in the front of holder. The results show that the
p ropermeasures can reduces the damage of p ick and holder and p rolongs its life.
Key words: roadheader; p ick; holder; ANSYS; stress
引 言
目前,由于截割对象的特殊性,截齿消耗量大、截割效率低已成为硬岩掘进机使用与推广面临的突出问题。这也是国内外从事掘进机研究与设计人员所面临的一大难题。分析硬岩掘进机截齿的载荷、截齿与齿座的受力情况与应力分布,对于研究硬岩截割时截齿的失效原因与破坏机理、改进截齿和齿座的设计、提高其使用寿命和工作可靠性、解决硬岩掘进机的截割效率与经济效益都具有重要意义。为此,笔者通过计算机模拟,确定单个截齿截割硬岩时的载荷量,并利用ANSYS软件对截齿及齿座进行有
限元分析。 ...
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