圆锥破碎机破碎系统的离散元分析

发布时间：2019-05-28 21:57

【摘要】：圆锥破碎机是现代工业中一种常见的物料矿石破磨设备,在冶金、建筑、矿山、化工等行业均有出现,其基本工作原理就是利用设备的挤压和碰撞产生的动能将矿石分解成粒度更小的颗粒。近年来,随着“多碎少磨”、“以碎代磨”的理念的出现,节能降耗、提高工作效率便成为圆锥破碎机设计生产中的一项重要指标,是现代圆锥破碎机技术发展的一大趋势。我国作为工业生产大国,日消耗矿石数量巨大,加上国内相关技术的欠缺,使得国产圆锥破碎机的质量和各项性能指标相对国外产品还有一定差距,目前国内先进圆锥破碎机来源还是以进口为主。为了学习消化国外先进技术,本文以瑞典山特维克公司生产的H8800型圆锥破碎机为研究对象,对其破碎系统进行离散元分析,得到其工作状态下各机构的受力情况。本文的研究对象以圆锥破碎机的破碎系统为主,找出各项对整个破碎系统工作状态影响较大的参数,如给料口与排料口尺寸、啮角、动锥转速、进动角等,然后使用SolidWorks软件对H8800型圆锥破碎机的破碎系统进行三维建模,其中包括芯轴、动锥、动锥衬板以及定锥衬板。接下来采用离散元方法并利用EDEM软件对H8800型圆锥破碎机的破碎系统在工作状态下的受力情况进行分析,将已经在SolidWorks软件中建立好的破碎系统三维模型导入EDEM软件中,建立物料颗粒模型,设置仿真参数并进行相关操作,将动锥转速、进动角和物料颗粒设置为变量,分别对其在不同动锥转速、不同进动角大小、不同给料粒度的情况下圆锥破碎机破碎系统的工作状态进行模拟,最终得到动锥衬板、定锥衬板以及物料矿石的受力情况,并找出不同参数的变化对破碎系统工作状态所造成的不同影响。从最终得出的结论可以看出:动锥转速的增加对圆锥破碎机破碎系统的的工作效率有改善作用,但会加速动锥衬板和定锥衬板的磨损;增大进动角可以提高破碎机生产能力,但整个圆锥破碎机的综合性能会下降。论文中得到的结论可以为圆锥破碎机的生产设计提供一些数据上的参考,并为更深入的研究打下了一定基础。
[Abstract]:Conical crusher is a common material and ore grinding equipment in modern industry, which has appeared in metallurgy, construction, mining, chemical industry and other industries. The basic working principle is to decompose the ore into smaller particles by using the kinetic energy generated by the extrusion and collision of the equipment. In recent years, with the emergence of the concept of "more crushing and less grinding" and "replacing grinding with crushing", energy saving and consumption reduction and improving working efficiency have become an important index in the design and production of conical crusher, and it is a major trend in the development of modern conical crusher technology. As a large industrial production country, China consumes a large amount of ore every day, coupled with the lack of domestic related technology, which makes the quality and performance indexes of domestic cone crusher still have a certain gap compared with foreign products. At present, the source of domestic advanced cone crusher is still mainly import. In order to learn and digest foreign advanced technology, this paper takes the H8800 cone crusher produced by Sandvik Company of Sweden as the research object, carries on the discrete element analysis to its crushing system, and obtains the force condition of each mechanism in its working state. The main research object of this paper is the crushing system of cone crusher, and the parameters that have great influence on the working state of the whole crushing system are found out, such as the size of feed port and discharge port, meshing angle, rotating speed of moving cone, feed angle and so on. Then the crushing system of H8800 cone crusher is modeled by SolidWorks software, including mandrel, moving cone liner and fixed cone liner. Next, the discrete element method and EDEM software are used to analyze the force of the crushing system of H8800 cone crusher in working state, and the 3D model of crushing system which has been established in SolidWorks software is imported into EDEM software. The material particle model is established, the simulation parameters are set up and the related operations are carried out. The rotating speed of the moving cone, the precession angle and the particle of the material are set as variables, and the rotating speed of the moving cone and the size of the different precession angle are respectively set up. Under the condition of different feed particle size, the working state of the crushing system of cone crusher is simulated, and finally the force of moving cone liner, fixed cone liner and material ore is obtained. The different effects of different parameters on the working state of the crushing system are found out. From the final conclusion, it can be seen that the increase of moving cone speed can improve the working efficiency of cone crusher crushing system, but it will accelerate the wear of moving cone liner and fixed cone liner. Increasing the feed angle can improve the production capacity of crusher, but the comprehensive performance of the whole cone crusher will decrease. The conclusions obtained in this paper can provide some data reference for the production design of cone crusher, and lay a certain foundation for further research.
【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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