非均匀受力段钢丝绳芯输送带的有限元分析方法的研究

发布时间：2018-08-13 18:53

【摘要】：输送带是带式输送机的重要部件,输送带的成本占整个输送机设备投资的1/3以上。输送带在整个输送过程中要产生弯曲变形,如凸弧段、凹弧段、过渡段和翻转段等,其中以过渡段和翻转段产生的变形更为剧烈,输送带的变形使输送带在宽度方向的张力重新分布,很容易产生输送带边缘的撕裂和输送带中部褶皱。对输送带过渡段和翻转段进行分析,得到输送带在宽度方向张力的分布情况,进而为输送带接头的设计研究提供一定的理论参考。得到输送带在过渡段和翻转段的具体受力情况,对合理选择输送带,降低输送带安全系数,进而降低输送机的成本,减少能源消耗具有重要意义。利用有限元软件ANSYS建立了钢丝绳芯输送带的有限元模型,橡胶选择2参数的Mooney-Rivlin模型,该模型在伸长量小于100%时能准确模拟橡胶材料,钢丝绳选用SOLID185单元。通过定义和设置接触的控制节点,实现刚性面(托辊)的转动,定义和控制MPC184单元,实现输送带的翻转。最终实现了输送带在过渡段的槽形变形和翻转段的翻转变形。所得分析结果与实际情况有十分良好的吻合性,误差也在允许的范围内。采用有限元的方法对过渡段输送带进行分析,得到了过渡段输送带在宽度方向的张力分布情况。输送带张力在过渡段呈槽形分布,输送带张力在两侧托辊上呈微凹形分布,在中间托辊上呈微凸弧分布,分别在中间托辊两端出输送带张力取得最小值,在输送带边缘钢丝绳出取得最大张力值。对翻转段输送带进行的有限元分析,得到了翻转段输送带在宽度方向的张力分布情况。送带在翻转段的张力分布为斜凹形抛物线分布,在输送带下边缘钢丝绳出取得张力最大值(大值),在输送带上边缘取得张力最大值(小值),在靠近输送带中间上边缘出取得最小值。
[Abstract]:Conveyor belt is an important part of belt conveyor, the cost of conveyor belt accounts for more than a third of the total equipment investment. The conveyor belt has to produce bending deformation in the whole transportation process, such as convex arc, concave arc, transition section and flip section, among which the deformation produced by the transition section and the flip section is more severe. The deformation of conveyor belt redistributes the tension of conveyor belt in width direction, and it is easy to produce the tear of the belt edge and the fold in the middle of the belt. The distribution of the belt tension in the width direction is obtained by analyzing the transition section and the flip section of the conveyor belt, which provides a certain theoretical reference for the design and research of the conveyor belt joint. It is of great significance to select the conveyor belt reasonably, reduce the safety coefficient of the conveyor belt, and then reduce the cost and energy consumption of the conveyor. The finite element model of steel wire core conveyor belt is established by using finite element software ANSYS, and the Mooney-Rivlin model with 2 parameters is selected by rubber. The model can accurately simulate rubber material when the elongation is less than 100, and SOLID185 element is used for wire rope. By defining and setting the contact control node, the rotation of rigid surface (roller) is realized, and the MPC184 unit is defined and controlled, and the conveyor belt is flipped. Finally, the groove deformation and the flip deformation of the conveyor belt in the transition section are realized. The results are in good agreement with the actual situation, and the error is within the allowable range. The finite element method is used to analyze the conveyor belt of the transition section, and the distribution of the tension in the width direction of the belt is obtained. The tension of the conveyor belt is distributed in the transition section, the tension of the belt is microconcave on the two sides of the roller, the tension of the belt is distributed in the arc on the middle roller, and the tension of the conveyor belt is obtained at the two ends of the intermediate roller to obtain the minimum value. The maximum tension value is obtained at the edge of the conveyor belt wire rope. Based on the finite element analysis, the tension distribution in the width direction of the inverted belt is obtained. The tension distribution of the belt in the flip section is an oblique concave parabola distribution. The maximum tension (large value) is obtained at the edge of the conveyor belt, the maximum tension (small value) is obtained at the upper edge of the conveyor belt, and the minimum value is obtained near the upper edge of the conveyor belt.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH222

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