摘要
为探究新型冲击破岩掘进机工作机构的结构性能,根据建立的虚拟样机仿真模型选取2种典型工况进行分析;利用建立的冲击锤力学模型求得凿入力;利用ANSYS对该工作机构的2种典型工况进行疲劳寿命分析。研究表明,工作机构疲劳寿命较低的部位主要集中在各构件的铰接处;最低寿命出现在液压冲击锤与转锤液压缸的铰接处为4.937×10~7;不同步(偏载)的疲劳寿命明显低于同步(正载);工况1(正常作业姿态)的疲劳寿命明显高于工况2(极限作业姿态);新型冲击破岩掘进机工作机构满足疲劳寿命要求。
In order to explore structural performance of working mechanism of new type impacting and crushing rock roadheader, two typical working conditions ofworking mechanism were defined by means of the virtual prototype simulation model, a penetrable forcewas obtained according toa mechanical model of the impacting hammerand a stress wave theory,thefatigue life analysis of working mechanismwas conducted by means of ANSYS in thetwo typical working conditions. The research shows thatthe parts of lower fatigue life ofworking mechanism are mainly concentrated in the jointsof components;the lowest life is 4.937 ~107,which appears in the joint of hydraulic impact hammer and hammer hydraulic cylinder; the fatigue life of nonsynchronous conditions （offset load） is significantly lower than that of synchronous（normal load）; the fatigue life of condition l（normal operation posture） is significantly higher than that of condition 2 （limit operation posture）;the working mechanism of new type crushing rock roadheadermeets the requirements of fatigue life. impacting and crushing rock roadheadermeets the requirements of fatigue life.
出处
《煤矿机械》
2017年第5期45-48,共4页
Coal Mine Machinery
关键词
冲击破岩掘进机
工作机构
冲击载荷
疲劳寿命分析
impacting and crushing rock roadheader
working mechanism
impact load
fatigue life analysis
