硬巖掘進機截齒與齒座的有限元分析
摘 要: 為了明確硬巖掘進機截齒與齒座的受力和應(yīng)力分布情況,確定其損壞原因,通過MATLAB軟件模擬單個截齒載荷,利用ANSYS對單個截齒及齒座進行有限元分析。研究表明:單個截齒的受力隨切屑厚度的變化而變化,截齒位置角在π/2處截齒所受的各向載荷最大。截齒的最大變形發(fā)生在刀頭部位,齒座的最大變形發(fā)生在齒座前部。根據(jù)研究結(jié)果,有針對性地采取措施,可進一步減少截齒及齒座損壞,延長其使用壽命。
關(guān)鍵詞: 掘進機; 截齒; 齒座; ANSYS; 應(yīng)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,由于截割對象的特殊性,截齒消耗量大、截割效率低已成為硬巖掘進機使用與推廣面臨的突出問題。這也是國內(nèi)外從事掘進機研究與設(shè)計人員所面臨的一大難題。分析硬巖掘進機截齒的載荷、截齒與齒座的受力情況與應(yīng)力分布,對于研究硬巖截割時截齒的失效原因與破壞機理、改進截齒和齒座的設(shè)計、提高其使用壽命和工作可靠性、解決硬巖掘進機的截割效率與經(jīng)濟效益都具有重要意義。為此,筆者通過計算機模擬,確定單個截齒截割硬巖時的載荷量,并利用ANSYS軟件對截齒及齒座進行有
限元分析。 ...
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