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中國礦業(yè)大學(xué)2007屆本科生畢業(yè)設(shè)計 第 II頁
摘 要
液壓支架廣泛應(yīng)用于現(xiàn)代長壁采煤工作面上。它不但能夠支撐頂板、推進工作面刮板輸送機、自行前移，而且能夠為井下聯(lián)合采煤作業(yè)提供一個安全的環(huán)境。正確、合理地選擇液壓支架架型是長壁工作面采煤成功的前提和關(guān)鍵。因此，綜合機械化采煤，是大幅度增加煤炭產(chǎn)量、提高經(jīng)濟效益的必由之路。為了滿足對煤炭日益增長的需要，必須大量生產(chǎn)綜合機械化采煤設(shè)備，迅速增加綜合機械化采煤工作面。
本文介紹了：支護設(shè)備的發(fā)展歷史及最新動態(tài)；液壓支架的發(fā)展歷程及發(fā)展趨勢；液壓支架的組成、作用和分類；液壓支架的液壓控制系統(tǒng)；液壓支架設(shè)計的一般步驟；液壓支架的操縱、維護、故障分析及處理等。在ZY3500/25/47型掩護式支架的設(shè)計過程中，著重對頂梁、掩護梁、底座、和立柱以及四連桿機構(gòu)進行了分析和設(shè)計。對重要結(jié)構(gòu)件如頂梁、底座和立柱等進行了分析，根據(jù)其常見失效形式、影響因素及基本設(shè)計要求，給出了重要結(jié)構(gòu)件的受力分析、強度和剛度的設(shè)計方法。最后，本文對液壓支架的使用、維護與發(fā)展趨勢做了簡單的敘述。
關(guān)鍵詞：ZY3500/25/47型掩護支架； 液壓支架； 結(jié)構(gòu)設(shè)計； 強度分析
ABSTRACT
Modern longwall mining employs hydraulic powered supports at the face area. The support 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 . Its successful selection and application are the prerequisite for successful longwall mining .Therefore the coal mining of comprehensive mechanization is the way that must be taken to increase significantly coal output and enhance the economic efficiency. In order to meet the needs which grows day by day to the coal, we must largely produce comprehensive mechanization mining coal equipment, rapidly increase the comprehensive mechanization mining coal working surface.
The followings are introduced in this paper: the develop history and latest dynamic state of the support equipments at domestic and international; the develop history and develop direction of the hydraulic support; components, functions, and types of the hydraulic support; the hydraulic control system of the hydraulic support; the normal design process of the hydraulic support; the hydraulic support’s operation, maintenance, fault analysis and processing and so on. In the design process of ZY3500/25/47 type root support shield, this paper will focus on the analysis and design of canopy, caving shield, base and hydraulic legs, as well as the connection method of leg with base and canopy. The important structure, such as canopy, base, hydraulic legs and so on, are analyzed. According to its failures, affecting factors and basic considerations, the design method of the strength and stiffness of the important structure is introduced. Finally, this paper describes using, maintenance, development tendency of hydraulic support.
Keywords：ZY3500/25/47 type root support shield; hydraulic support; structure design; strength analysis