薄煤層液壓支架的設(shè)計_畢業(yè)設(shè)計論文(已修改)
2024-09-11 20:35 本頁面
【正文】 摘 要 隨著 煤炭資源的日益減少，如何更好的實現(xiàn)對薄煤層的開采成為了一個重要 話題。在我國 西南部 的很多 礦區(qū)， 薄 煤層已經(jīng)成為主采煤層。液壓支架作為煤礦開采的重要支護(hù)設(shè)備，在 保證工人的人身安全 的同時 ，還要提高煤礦的生產(chǎn)效率。因此，研制高質(zhì)高效的薄煤層液壓支架具有重要的意義。 傳統(tǒng)的液壓支架使用兩柱或四柱支撐，工作阻力小，而且四連桿機(jī)構(gòu)設(shè)計起來十分困難，最終只能用近似的雙紐線 實現(xiàn)頂梁端部的運(yùn)動， 頂梁 仍然有傾向煤壁的趨勢。本文設(shè)計的液壓支架采用八根立柱支撐，支護(hù)阻力大，取消了四連桿機(jī)構(gòu) ，用立柱的液壓力抵抗水平力，是 液壓支架設(shè)計方法的巨大進(jìn)步。 本文設(shè)計的內(nèi)容主要包括：頂梁、底座、前梁、立柱等關(guān)鍵部件的結(jié)構(gòu)設(shè)計，建立液壓支架的三維模型，實現(xiàn)運(yùn)動仿真，最后進(jìn)行有限元分析校核關(guān)鍵部件的強(qiáng)度。設(shè)計的過程中參考了現(xiàn)有液壓支架結(jié)構(gòu)設(shè)計的優(yōu)點，如頂梁的箱形結(jié)構(gòu)、底座的底分式結(jié)構(gòu)等 。 本設(shè)計的主要創(chuàng)新點在于：八根立柱對頂板實現(xiàn)密集支護(hù)，不僅提高了支護(hù)阻力，而且可以通過更換不同缸徑的懸浮式立柱 ， 實現(xiàn) 支架的模塊化設(shè)計 、 集成化裝配和規(guī)?；a(chǎn) ， 大大縮短了生產(chǎn)和檢測周期 ， 加快了我國綜采機(jī)械化生產(chǎn)進(jìn)程 。薄煤層液壓支架一般采用鄰架控制，為了減 少管路上的壓力損失， 方便人員的操作，設(shè)計了一種先導(dǎo)控制的液壓系統(tǒng)，對液壓支架液壓系統(tǒng)的設(shè)計具有一定的參考價值。 關(guān)鍵詞： 液壓支架； 超靜定結(jié)構(gòu)； 運(yùn)動仿真； 有限元分析 ABSTRACT With the decrease of the coal resources, how to mine the thin coal seam better became an important topic. In the southwest of China, the thin coal seam has been the mainly mining area. Hydraulic support as the important supporting equipment in coal mining, not only to ensure the safety of workers, but also to improve production efficiency of coal mine. Therefore, the development of the high quality and high efficient hydraulic support in thin coal seam has vital significance. The traditional hydraulic support using two or four hydraulic pillars support the roof of coal seam, the force of the support is small, and the design of four bar linkage is very difficult. Because the movement of the top beam can only realize with approximate Double new line, there are still a tendency of coal wall trend. This paper introduces the design of hydraulic support adopted eight hydraulic pillars, cancelled four bar linkage, using the hydraulic pressure resist level force. The design method of hydraulic support is a great progress. The main of this paper introduce: The structure of top beam, base beam, front beam and hydraulic pillars and other key parts of the hydraulic support, build hydraulic support39。s 3 d model to realize the movement simulation, use finite element analysis to analyse the structure strength of key parts. The design process of the hydraulic support reference the structure design of the existing hydraulic support, such as the box structure of the top beam. The main innovation of this design is: eight hydraulic pillars to realize intensive supporting, not only improve support resistance, but also can through replacing different diameter of the hydraulic pillars to realize the modular design , integrated assembly and largescale production, which greatly reduce the cycle of production and testing, and also speed up the mechanization of manufacturing process. Thin coal seam hydraulic support general use of the neighboring support control, in order to reduce the pressure loss on the pipeline, the design of the hydraulic system introduce a method of pilot control , which has some reference value for the design of the hydraulic system. Key words: Hydraulic support； Super static set structure； Movement simulation； Finite element analysis 目 錄 1 緒論 1 薄煤層開采技術(shù) 1 液壓支架的用途及分類 1 液壓支架的作用 1 液壓支架的工作過程 1 液壓支架的現(xiàn)場布置 3 液壓支架的分類 4 液壓支架的支護(hù)方式 5 對液壓支架的基本要求 5 薄煤層液壓支架的結(jié)構(gòu)特點 5 液壓支架的國內(nèi)外現(xiàn)狀及發(fā)展趨勢 6 超靜定結(jié)構(gòu) 的創(chuàng)新和優(yōu)點 9 2 液壓支架整體結(jié)構(gòu)設(shè)計 10 液壓支架的設(shè)計參數(shù) 10 支架的高度和支架的伸縮比 10 支架高度 10 支架的伸縮比 10 支架間距 10 底座長度的確定 11 頂梁尺寸 11 支架工作方式對頂梁長度的影響 11 頂梁長度 11 頂梁寬度 1
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