煤粉制样筛分装置设计及粒径分级研究论文-毕业论文（设计）.docVIP

中北大学2013届毕业设计说明书 煤粉制样筛分装置设计及粒径分级研究 摘要 随着生产力的发展，在煤炭加工行业上，对煤的粒度分级有了更高的要求，煤炭筛分分级技术发展起来。振动筛以其筛分效率高，结构简单，工作可靠，成本低等优势，在所有筛分设备中，占有绝对优势。振动筛筛分的机理研究是振动筛设计的基础,高的筛分效率和大的处理量一直是筛分作业追求的目标。因此振动筛的筛分效率的研究和优化对筛分机的设计有重要的意义。计算机的模拟及软件的分析已成为研究筛分机的重要手段。本文首先对物料的筛分过程进行了研究，接着又进行了煤用筛分机的工艺学参数、动力学参数和筛面结构参数的计算，然后又总结了筛面长度与筛分效率的一般性关系，本文还分析了不同条件下颗粒的分层与透筛之间的关系，对粒径分级进行了研究，最后建立起振动筛的数学模型，在此基础上进行了筛分效率优化。另外，运用SolidWorks软件进行了整体结构的设计，又运用SolidWorks Simulation模块对筛分机的关键部件进行了有限元分析。 关键词：煤用筛分机，粒径分级，数学模型，结构设计，有限元分析 Coal screening device design and size classification research Abstract With the development of productive forces, in the coal industry, there are more requirements on the size grading of coal, coal classification technology developed. Vibrating screen with its high efficiency, simple structure, reliable work, low cost etc, in all screening equipment, have absolute advantage. Study on the mechanism of vibration sieve screening is the basis of vibrating screen design, high screening efficiency and high throughput screening has been the pursuit of the goal. Therefore the research and optimization of the screening efficiency of vibrating screen have important significance to the design of screen. Simulation and analysis software of computer has become an important means to study the screen. This paper first process for screening materials were studied, and the calculation process of coal sieving machine parameters, dynamic parameters and structure parameters of the screen surface, and then summarizes the general relationship between the sieve length and the screening efficiency, this paper also analyzes the hierarchical particle under different conditions and the relationship between the transparent screen, on the particle size grading were studied, finally establish the mathematical model of vibrating screen, on the basis of the screening efficiency optimization. In addition, the design of the overall structure of the use of SolidWorks software, and using the SolidWorks Simulation module of the finite