卧螺锥套回转干燥机组合螺带及转筒结构力学分析与优化

发布时间：2018-06-01 03:56

本文选题：连续式 + 干燥机　；参考：《天津大学》2015年硕士论文

【摘要】：多晶硅生产过程中三氯氢硅提纯精制、冷氢化及还原炉硅沉积等环节都会产生粉状物质形成以氯硅烷和硅粉为主要组成的渣浆产物,渣浆的产生不仅会影响工艺过程的稳定运行,处理不当还会造成严重的环境污染。故如何合理处理多晶硅渣浆成为目前多晶硅行业亟待解决的技术难题。本文以处理多晶硅生产中的固渣浆料为目的,研究开发了一种新型连续式密闭的干燥机,根据渣浆干燥过程的特点,在应用经典力学理论的解析计算基础上确定了新型连续密闭干燥机的工作原理和初步结构方案,运用软件ANSYS Workbench分别对初步设计尺寸的干燥机复杂搅拌结构的组合内螺带和回转外锥筒进行了力学分析,得到各组件各部分的应力分布状态和变形情况,从而找出结构的薄弱环节及设备研究开发的控制关键点。结果表明:组合内螺带和回转外锥筒结构的强度和刚度均满足工艺要求,即最大等效应力小于材料许用应力,螺带最大挠度变形小于螺带与筒壁间隙。滚轮支承支杆和轴承安装处产生应力集中,应该尽量降低锥套等结构质量并增大截面惯性矩以改善结构受力和变形状态。然后在有限元分析的基础上,对干燥设备的核心结构—组合内螺带和回转外锥筒结构进行优化设计,以结构总质量、最大应力、最大变形为优化变量,得到能够满足对应强度、刚度要求的组合内螺带和回转外锥筒的最优化设计方案。实现质量最小化,降低原料成本和制造成本。根据力学分析和优化结果,为该新型连续式卧螺锥套回转干燥设备的工业化提供了理论依据和参考。
[Abstract]:In the process of polycrystalline silicon production, the purification and purification of trichlorosilane, cold hydrogenation and silicon deposition in reduction furnace will produce powdery substances to form slurries consisting mainly of chlorosilane and silane. Slurry production will not only affect the stable operation of the process, but also cause serious environmental pollution. Therefore, how to deal with polycrystalline silicon slurry rationally has become a technical problem to be solved urgently in polysilicon industry. In order to deal with solid slag slurry in polysilicon production, a new type of continuous closed dryer is developed in this paper. According to the characteristics of slurry drying process, Based on the analytical calculation of classical mechanics theory, the working principle and preliminary structure scheme of a new type of continuous airtight dryer are determined. The mechanical analysis of the combined inner screw belt and the rotary outer cone of the complicated mixing structure of the dryer with preliminary design size was carried out by using the software ANSYS Workbench, and the stress distribution and deformation of the various parts of the components were obtained. In order to find out the weak links of the structure and equipment research and development of the key points of control. The results show that the strength and stiffness of the combined inner screw belt and the rotary outer conical cylinder structure meet the technological requirements, that is, the maximum equivalent stress is less than the allowable stress of the material, and the maximum deflection deformation of the screw belt is smaller than the gap between the snail belt and the cylinder wall. The stress concentration of roller bearing support rod and bearing installation should be reduced and the moment of inertia of the section should be increased to improve the stress and deformation of the structure. Then on the basis of finite element analysis, the optimization design of the core structure of the drying equipment, that is, the combination of inner screw belt and the outer cone tube structure, is carried out. With the total mass, maximum stress and maximum deformation of the structure as the optimization variables, the corresponding strength can be satisfied. The optimum design scheme for the combination of the inner screw belt and the outer cone cylinder with the rigidity requirement. Achieve quality minimization and reduce raw material and manufacturing costs. According to the results of mechanical analysis and optimization, this paper provides a theoretical basis and reference for the industrialization of the new continuous horizontal spiral cone sleeve rotary drying equipment.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.892

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