摘要
为了探究移动式液压破碎机在各种不利工况下工作机构的强度、变形和应力分布,寻求其破坏的原因,为改进结构、改善其工作性能、延长使用寿命提供依据,利用Pro/E软件建立了某型移动式破碎机工作机构的三维实体模型,根据冲击机械系统波动力学理论,导出移动式液压破碎机破碎岩石时力的计算模型,求得岩石对钎杆的最大反作用力。使用ANSYS Workbench有限元分析软件对工作机构的4种不利工况进行仿真。结果表明:在最大破碎深度时的最大应力值为260.1 MPa,其安全系数不满足要求,是工作机构破坏的根源;应力集中均发生在各油缸铰支座与上、下盖板的连接位置,是产生疲劳破坏的主要原因。
In order to explore strength, deformation and stress distribution of the working mechanism of mobile hydraulic crusher under unfavorable different conditions, seek the reasons of its fail- ure, and offer the foundations of improving structure and working performance, prolonging the service life, a 3D solid model of a mobile crusher working mechanism was built by using Pro/E soft- ware. According to the wave mechanics theory of impact mechani- cal system, a force calculation model for broken rock was de- duced; the biggest reaction force by rock acting on tool was ob- tained. Simulations of the working mechanism under four kinds of unfavorable conditions were done using ANSYS Workbench finite element analysis software. The results showed that the maximum stress value is 260.1 MPa in maximum crushing depth, the destructive root of the working mechanism is that the safety factor doesn＇t meet the requirement. Stress concentration occurs in cylinder hinged support and the connection place of the upper and low- er cover, which is the major reason for the fatigue failure of the working mechanism.
出处
《机械设计》
CSCD
北大核心
2014年第9期40-43,共4页
Journal of Machine Design
基金
国家自然科学基金资助项目(59774033)
中国煤炭工业协会科学技术研究指导性计划资助项目(MTKJ2011-325)
关键词
移动式液压破碎机
工作机构
强度
变形
有限元
mobile hydraulic crusher
working mechanism
strength
deformation
finite element
