【摘要】：對于煤礦長大斜井隧道,連續(xù)皮帶輸送機以其運行可靠、出渣能力強、適應性廣等優(yōu)點,已成為隧道出渣系統(tǒng)的優(yōu)選方案。但是隨著運距運量的增加和工程地質(zhì)條件的復雜性,連續(xù)皮帶機的動力學問題和起動問題越加突出,傳統(tǒng)的輸送機設計已不能滿足實際的工程需要,而目前國內(nèi)關于皮帶輸送機的研究多集中于單驅(qū)動、單改向滾筒、單張緊裝置的露天皮帶輸送機,因此本文以神華新街煤礦斜井隧道為背景對多點驅(qū)動連續(xù)皮帶機出渣方案的確定、動態(tài)特性、最佳軟起動方式三大關鍵技術進行研究,本文主要做了以下工作:(1)結合實際的工程背景,分析了連續(xù)皮帶機出渣時的難點問題,選擇了合適的驅(qū)動方案,糾偏方案,最終確定了連續(xù)皮帶機的出渣方案,基于確定的出渣方案,采用常規(guī)設計的方法得到了動態(tài)仿真前所需的關鍵參數(shù)。(2)對皮帶機關鍵部件輸送帶的動力學特性分析選擇了合適的Kelvin模型作為輸送帶的動力學模型,之后采用有限元的思想將本工程連續(xù)皮帶機劃分為多個單元,通過對輸送帶單元、驅(qū)動滾筒單元、改向滾筒單元、張緊滾筒單元的受力特性分析推導出各單元的動力學方程從而得到整機的動力學方程,并對動力學方程中的各系數(shù)矩陣進行了求解。(3)通過對建立起的連續(xù)皮帶機動力學模型和軟起動問題的分析,選定采用基于功率追蹤控制的Wilson-θ積分方法來求解整機動力學方程,根據(jù)求解步驟得到了仿真程序流程圖,利用Matlab軟件編寫了動態(tài)仿真程序,并對仿真結果進行了詳細分析。(4)通過對4種常用起動曲線的特性及動態(tài)仿真結果的對比分析,確定了仿真時所用Harrison正弦起動曲線的合理性,并以此為基礎設計了一種更為優(yōu)化的組合正弦形加速度起動曲線,仿真結果證明了所設計起動曲線的優(yōu)化性與合理性。(5)基于Matlab軟件的GUIDE開發(fā)工具,設計了連續(xù)皮帶機動態(tài)仿真的GUI界面,主要包括參數(shù)輸入、起動曲線選擇和動態(tài)仿真3大板塊,并通過實例演示了 GUI界面的操作過程。
[Abstract]:For long and long inclined coal mine tunnel, continuous belt conveyor has become the optimal selection scheme of tunnel slag extraction system because of its advantages of reliable operation, strong slag production ability and wide adaptability. However, with the increase of transportation volume and the complexity of engineering geological conditions, the dynamic and starting problems of continuous belt conveyor become more and more prominent, and the traditional design of conveyor can not meet the actual engineering needs. At present, domestic researches on belt conveyors are mostly focused on open-air belt conveyors with single-drive, single-direction roller and single tensioning device. Therefore, based on the inclined tunnel of Shenhua Xinjie Coal Mine, this paper studies three key technologies, such as the determination of the slagging scheme, the dynamic characteristics and the best soft starting method of the multi-point drive continuous belt conveyor. The main work of this paper is as follows: (1) based on the actual engineering background, the paper analyzes the difficult problems in the slag production of the continuous belt machine, selects the appropriate drive scheme, corrects the deviation, and finally determines the slag production scheme of the continuous belt machine. Based on the determined slag extraction scheme, the key parameters needed before dynamic simulation are obtained by conventional design method. (2) the appropriate Kelvin model is chosen as the dynamic model of conveyor belt for the analysis of the dynamic characteristics of belt conveyor's key components. After that, the continuous belt conveyor of the project is divided into several units by using the idea of finite element method. By means of the conveyor belt unit, the roller unit is driven, and the roller unit is changed to the roller unit. The mechanical characteristics of the tensioning drum element are analyzed and the dynamic equations of each element are derived and the dynamic equations of the whole machine are obtained. The coefficient matrix of the dynamic equation is solved. (3) by analyzing the dynamic model and soft start problem of continuous belt machine, the Wilson- 胃 integral method based on power tracking control is selected to solve the dynamic equation of the whole machine. According to the solving steps, the flow chart of the simulation program is obtained, and the dynamic simulation program is compiled by using Matlab software, and the simulation results are analyzed in detail. (4) the characteristics of the four commonly used starting curves and the dynamic simulation results are compared and analyzed. The rationality of the Harrison sinusoidal starting curve used in simulation is determined, and a more optimized combined sinusoidal acceleration starting curve is designed. The simulation results prove the optimality and rationality of the designed starting curve. (5) based on the GUIDE development tool of Matlab software, the GUI interface of dynamic simulation of continuous belt machine is designed, which mainly includes parameter input, starting curve selection and dynamic simulation. The operation process of GUI interface is demonstrated by an example.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD551

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