【正文】 I 摘要 我課題的研究內(nèi)容是支撐掩護式液壓支架的總體 及推移千斤頂強度 設(shè)計。現(xiàn)代長壁工作面采煤已經(jīng)在開采區(qū)使用液壓支架。液壓支架不僅支撐頂板，推動刮板輸送機工作面和自移式支架本身，而且還為相關(guān)的采煤設(shè)備提供一個安全的工作環(huán)境。因此正確的選擇和應(yīng)用液壓支架是長壁工作面采煤成功的先決條件。此外，由于對液壓支架需求數(shù)量很大，對液壓支架的投資經(jīng)常要占到長壁采煤工作面初始投資的一半以上。因此，從技術(shù)和經(jīng)濟兩方面的觀點看，液壓支架是長壁采煤工作面設(shè)備中十分重要的一部分。支撐掩護式液壓支架結(jié)合了垛式液壓支架和掩護式液壓支架的 特點。所以，支撐掩護式液壓支架具有以上兩者所具有的優(yōu)點。液壓支架作為回采工作面的一種支護設(shè)備，液壓支架在工作過程中能否取得良好的支護效果，取決于支架的架型，結(jié)構(gòu)和相關(guān)參數(shù)。首先，通過 C 語言程序 確定支架的四連桿機構(gòu)各桿系的長度；然后，以力學(xué)模型為依據(jù)，分析了液壓支架的頂梁、掩護梁上載荷的作用機理，得到了較為合理的支架載荷的計算公式；其次，結(jié)合設(shè)計的支架，從平面和空間兩方面對支架主要結(jié)構(gòu)件進行受力分析；最后對支架主要結(jié)構(gòu)件、掩護梁 、推移千斤頂 和立柱進行強度效核 ,并畫出所有的機械圖。 關(guān)鍵詞 ：支撐掩護式液壓支架； 頂梁；四連桿；推移千斤頂；強度 II Abstract My paper mainly foused on the problem which designs about a type of chockshield longwall mining employs hydraulic powered supports at the face area. The supports not only holds up the roof, pushes the face chain conveyor, and advances itself, but also provides a safe environment for all associated mining activities. Therefore its successful selection and application are the prerequisite for successful longwall mining. Furthermore, due to the large number of units required, the capital invested for the power support usually accounts for more than half of the initial capital for a longwall face. Therefore both from technical and economic points of view, the powered support is a very important piece of eq uipment in a long wall chock shield bines the features of the chocks and the shields. As such it possesses the advantages of hydraulic support is a part of the mining industry equipment in the mine, is used for protection of working environment in the gallery. It works well or bad at work basing on its support mode, frame and some parameters. In the first, the length of every pole of the leading fourbar mechanism are determined by C Programming Language, the base of mechanic model of supportsurrounding, the mechanism and loads on the support is decided. The next work, with the condition of the design, the main mechanics of hydraulic support is analyzed and calculated by plane and spatial model. Finally, the under frame, top beam cave shield, T beams and columns are analyzed by calculation. And draw out all the process drawings. Key words: chockshield hydraulic support。 canopy。 fourbar links。 strength 目錄 前言 ....................................................................................................................................... 1 1 概述 ................................................................................................................................. 2 液壓支架發(fā)展過程及現(xiàn)狀 ................................................................................. 2 液壓支架的應(yīng)用 ................................................................................................... 3 液壓支架的作用 ................................................................................................. 3 綜采工作面的布置 ............................................................................................ 3 液壓支架的類型及其結(jié)構(gòu)特點 ....................................................................... 3 支架的結(jié)構(gòu)及工作原理 ..................................................................................... 4 液壓支架的組成 ................................................................................................. 4 液壓支架的工作原理 ........................................................................................ 7 液壓支架工況分析 ............................................................................................ 9 液壓支架立柱的工作過程 ............................................................................ 10 液壓支架設(shè)計的目的和要求 ............................................................................12 設(shè)計目的 .............................................................................................................12 對液壓支架的基本要求 .................................................................................12 2 液壓支架整體結(jié)構(gòu)分析及選型 ................................................................................13 支撐 掩護式 (ZZY)支架的特點及適用條件 ................................................13 液壓支架基本結(jié)構(gòu)部件選型 ..........................................................................14 頂梁 .......................................................................................................................14 護幫裝置形式的選擇 ......................................................................................15 支架側(cè)護板形式的選擇 .................................................................................16 底座 ......................................................................................................................18 推移裝置的形式選擇 ......................................................................................19 其他部件選擇 ....................................................................................................20 主要參數(shù)設(shè)計 ......................................................................................................20 支架的最大高度和最小高度 ........................................................................20 梁端距和頂梁長度的確定 ............................................................................21 支架的中心距和寬度 ......................................................................................22 底座長度 .............................................................................................................22 底座寬度 .............................................................................................................22 立柱位置的確定 ...............................................................................................22 其他附屬設(shè)備的配套 .......................................................................................23 3 液壓支架四連桿機 構(gòu)設(shè)計 ........................................................................................24 四連桿的分類 ......................................................