新型带式输送机转运站典型部件设计

发布时间：2018-05-08 05:21

本文选题：传统和新型转运站 + 颗粒接触力学模型　；参考：《太原科技大学》2017年硕士论文

【摘要】：带式输送机是固定式或运移式起重运输设备的一大类。它在各种现代化工矿企业的生产过程中起着不可或缺的作用。带式输送机转运站层高较大,物料流受重力作用自由下落,传统转运站由于转运过程冲击碰撞剧烈,严重影响供料系统的正常运行,从而各种问题逐渐引起人们的重视。转运站物料阻塞、粉尘逸出量超标以及输送带偏载和加速磨损的情况时有发生,本文对传统转运站和新型转运站进行了对比分析,从而沿着减少粉尘的方向进行分析,进而设计出了新型束流头罩、三通分料器、曲线落料管和无动力抑尘导料槽。建立了颗粒接触力学模型,从而得到非连续介质的颗粒单元的运动模型。利用离散元理论对料流在头部护罩、落料管以及导料槽中的运动进行了料流分析,并证明了其在转运站内具有良好的防堵抑尘效果,并重点分析了湿度和粒度对落料管接触力的影响,为曲线落料管的磨损分析提供了技术支持。同时对粉尘产生机理进行了深入研究,设计出了具有自然沉降粉尘颗粒的新型导料槽,利用计算流体力学软件对导料槽的粉尘运动进行分析,确认了其合理性和可行性。本文针对国内外带式输送机转运站存在的缺点,设计出的新型束流头罩、新型三通分料器以及曲线落料管和无动力抑尘、除尘导料槽可以有效控制料流的方向和速度,解决了传统转运站存在的物料冲击大,粉尘大和带式输送机受料跑偏等问题。为工程设计人员提供了新的设计方向,为解决传统转运站的缺点提供了有力的支持。
[Abstract]:Belt conveyor is a kind of fixed or moving lifting equipment. It plays an indispensable role in the production process of various modern industrial and mining enterprises. The transfer station of belt conveyor has a large layer height and the material flow falls freely by the action of gravity. Because of the severe impact and collision of the traditional transfer station, the normal operation of the feed system is seriously affected, so people pay more and more attention to all kinds of problems. Material blockage, excessive dust emission, eccentric load and accelerated wear of conveyer belt occur from time to time. This paper makes a comparative analysis between traditional transfer station and new type transfer station, so as to analyze along the direction of reducing dust. Furthermore, a new beam hood, a three-way separator, a curved discharge tube and an unpowered dust suppression and conducting tank are designed. The particle contact mechanics model is established, and the motion model of particle element in discontinuous medium is obtained. Based on the discrete element theory, the material flow in the head guard, the drop tube and the guide tank is analyzed, and it is proved that the material flow has a good effect of blocking and dust suppression in the transfer station. The influence of humidity and particle size on the contact force of the blanking pipe is analyzed, which provides technical support for the wear analysis of the curved blanking pipe. At the same time, the mechanism of dust generation is deeply studied, and a new type of guide tank with naturally deposited dust particles is designed. The dust movement of the guide tank is analyzed by using computational fluid dynamics software, and the rationality and feasibility of the channel are confirmed. In this paper, aiming at the shortcomings of the domestic and foreign belt conveyor transfer stations, a new type of beam hood, a new type of three-way material separator, a curve drop pipe and no dynamic dust suppression are designed, and the direction and speed of the material flow can be effectively controlled by the dust removal guide tank. The problems such as large impact of materials, heavy dust and deviation of belt conveyor are solved in the traditional transfer station. It provides a new design direction for engineering designers and provides a strong support for solving the shortcomings of traditional transfer stations.
【学位授予单位】：太原科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH222

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