双齿辊破碎机破碎过程研究

发布时间：2018-07-08 13:30

本文选题：有限元 + 动态仿真　；参考：《有色金属(选矿部分)》2017年01期

【摘要】：为了研究双齿辊破碎机破碎物料的过程,首先对物料破碎理论进行分析,得出了双齿辊破碎机是准静压、剪切弯曲组合破碎的结论。其次,运用Solid Works和LS-DYNA建立了辊齿破碎煤块的三维仿真有限元模型,分析了物料颗粒在破碎过程中的受力情况,得出了物料在破碎瞬时处于稳定的平衡状态的结论,并对破碎过程进行了动态仿真分析。最后,经过分析可知,辊齿在破碎物料时,煤块的局部首先受到冲击和挤压作用而出现裂纹,随着齿辊的转动及辊齿切入煤块的深度增加,裂纹扩展直至出现煤体崩落;得到了煤块在整个破碎过程中的应力变化情况及分布规律。研究结果为辊齿的结构参数优化、物料破碎过程分析提供了一定依据。
[Abstract]:In order to study the process of material crushing in double-tooth roller crusher, the theory of material crushing is analyzed firstly, and the conclusion that the double-tooth roller crusher is quasi-static pressure and shear bending combined crushing is obtained. Secondly, by using solid works and LS-DYNA, the three-dimensional simulation finite element model of roller teeth crushing coal block is established, and the stress situation of material particle in the process of crushing is analyzed, and the conclusion that material is in stable equilibrium state is obtained. And the dynamic simulation analysis of the crushing process is carried out. Finally, through the analysis, it can be seen that when the roller teeth are crushing materials, the crack appears in the part of the coal block under the first impact and extrusion action, and with the rotation of the tooth roller and the increase of the depth of the cutting into the coal block, the crack expands until the coal body caving occurs. The stress variation and distribution of coal block in the whole process of crushing are obtained. The results provide a basis for the optimization of the structural parameters of the roller teeth and the analysis of the material crushing process.
【作者单位】：东北大学机械工程与自动化学院;
【基金】：国家高技术研究发展计划项目(2012AA062002)
【分类号】：TD451

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