矿用双齿辊破碎机结构设计与强度分析

发布时间：2018-08-16 12:53

【摘要】：当前,对于冶金、矿山、建材、水力、化工等工业产业,物料的破碎正占据越来越重要的地位。物料破碎作为一项基础工程,每年都会有大量的矿山材料和重复利用的废料进行粉碎处理。随着各种破碎材料的不断增加,对破碎的精度要求不断加大,还有能源逐渐短缺,因此必须对破碎作业的现状进行改进。就破碎机而言,提高其工作的效率,实现“多碎少磨”成为我们研究的重点,而双齿辊破碎机依靠其先进性,为矿山破碎注入一股活力。本论文以双齿辊破碎机为研究对象,从结构三维设计、虚拟仿真、结构强度有限元分析等方面进行了研究,希望能够实现将双齿辊破碎机应用于破碎铁矿石的目的。本论文首先根据双齿辊破碎机的基本结构组成,利用Solidworks软件建立双齿辊破碎机系统模型,进行整体的三维设计,并通过EDEM离散元模拟现实工况,分别模拟出破碎齿破碎煤块和铁矿石两种物料时所承受的破碎力。其次,将以建立的三维模型导入有限元ANSYS软件,通过EDEM离散元软件模拟出的最大破碎力对破碎齿进行有限元分析,从而得出破碎齿各个部位应力、应变的分布情况,确定最大应力发生的部位。通过分析发现破碎齿在破碎煤矿过程中满足要求,二破碎齿在破碎铁矿石过程中强度不够,还需要在材质和破碎结构上进行改进,提高强度,才能将双齿辊破碎机应用在铁矿石的破碎生产中。最后,本论文利用ANSYS Workbench软件对破碎系统破碎部件(破碎齿辊和破碎齿)进行了前十阶的模态分析,得到前十阶的固有频率和振型,可以看出前十阶的频率远离其固有频率,证明双齿辊破碎机在工作时能够有效地避免发生共振现象。通过上述分析可谓双齿辊破碎机的广泛应用提供参考依据。
[Abstract]:At present, for metallurgy, mining, building materials, hydraulic, chemical and other industrial industries, material crushing is playing a more and more important role. Material crushing as a basic project, every year there will be a large number of mine materials and recycled waste for crushing treatment. With the increasing of all kinds of crushing materials, the requirement of crushing precision is increasing, and there is a shortage of energy, so it is necessary to improve the present situation of crushing operation. As far as crusher is concerned, improving its working efficiency and realizing "more crushing and less grinding" has become the focus of our research, while double-toothed roller crusher relies on its advanced nature to inject vitality into mine crushing. In this paper, the double tooth roller crusher is taken as the research object, from the structural 3D design, virtual simulation, structural strength finite element analysis and so on, it is hoped that the double tooth roller crusher can be applied to the purpose of crushing iron ore. In this paper, according to the basic structure of the double-tooth roller crusher, the system model of the double-tooth roller crusher is established by using Solidworks software, and the whole three-dimensional design is carried out, and the real working condition is simulated by EDEM discrete element. The crushing force of crushing teeth and iron ore are simulated respectively. Secondly, the 3D model is imported into the finite element ANSYS software, and the finite element analysis of the broken tooth is carried out through the maximum breaking force simulated by the EDEM discrete element software, and the distribution of stress and strain in each part of the broken tooth is obtained. Determine where the maximum stress occurs. Through the analysis, it is found that the broken teeth meet the requirements in the process of crushing coal mine, the strength of the second broken teeth is not enough in the process of crushing iron ore, and the material and structure of the broken teeth need to be improved to increase the strength. In order to apply the double-tooth roller crusher in the crushing production of iron ore. Finally, the first ten modes of crushing parts (broken tooth roller and broken tooth) of crushing system are analyzed by ANSYS Workbench software, and the first ten natural frequencies and modes are obtained. It can be seen that the first ten order frequencies are far away from their natural frequencies. It is proved that the double tooth roller crusher can avoid resonance effectively. The above analysis can be described as a reference for the wide application of double-tooth roller crusher.
【学位授予单位】：辽宁科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD451

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