發(fā)布時(shí)間：2018-08-13 18:53

【摘要】：輸送帶是帶式輸送機(jī)的重要部件,輸送帶的成本占整個(gè)輸送機(jī)設(shè)備投資的1/3以上。輸送帶在整個(gè)輸送過程中要產(chǎn)生彎曲變形,如凸弧段、凹弧段、過渡段和翻轉(zhuǎn)段等,其中以過渡段和翻轉(zhuǎn)段產(chǎn)生的變形更為劇烈,輸送帶的變形使輸送帶在寬度方向的張力重新分布,很容易產(chǎn)生輸送帶邊緣的撕裂和輸送帶中部褶皺。對(duì)輸送帶過渡段和翻轉(zhuǎn)段進(jìn)行分析,得到輸送帶在寬度方向張力的分布情況,進(jìn)而為輸送帶接頭的設(shè)計(jì)研究提供一定的理論參考。得到輸送帶在過渡段和翻轉(zhuǎn)段的具體受力情況,對(duì)合理選擇輸送帶,降低輸送帶安全系數(shù),進(jìn)而降低輸送機(jī)的成本,減少能源消耗具有重要意義。 利用有限元軟件ANSYS建立了鋼絲繩芯輸送帶的有限元模型,橡膠選擇2參數(shù)的Mooney-Rivlin模型,該模型在伸長量小于100%時(shí)能準(zhǔn)確模擬橡膠材料,鋼絲繩選用SOLID185單元。通過定義和設(shè)置接觸的控制節(jié)點(diǎn),實(shí)現(xiàn)剛性面(托輥)的轉(zhuǎn)動(dòng),定義和控制MPC184單元,實(shí)現(xiàn)輸送帶的翻轉(zhuǎn)。最終實(shí)現(xiàn)了輸送帶在過渡段的槽形變形和翻轉(zhuǎn)段的翻轉(zhuǎn)變形。所得分析結(jié)果與實(shí)際情況有十分良好的吻合性,誤差也在允許的范圍內(nèi)。 采用有限元的方法對(duì)過渡段輸送帶進(jìn)行分析,得到了過渡段輸送帶在寬度方向的張力分布情況。輸送帶張力在過渡段呈槽形分布,輸送帶張力在兩側(cè)托輥上呈微凹形分布,在中間托輥上呈微凸弧分布,分別在中間托輥兩端出輸送帶張力取得最小值,在輸送帶邊緣鋼絲繩出取得最大張力值。 對(duì)翻轉(zhuǎn)段輸送帶進(jìn)行的有限元分析,得到了翻轉(zhuǎn)段輸送帶在寬度方向的張力分布情況。送帶在翻轉(zhuǎn)段的張力分布為斜凹形拋物線分布,在輸送帶下邊緣鋼絲繩出取得張力最大值(大值),在輸送帶上邊緣取得張力最大值(小值),在靠近輸送帶中間上邊緣出取得最小值。
[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.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH222

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