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目錄
摘 要 I
Abstract II
第1章 緒論 1
1.1 露天煤礦及露天煤礦采煤工藝的發(fā)展 1
1.2 礦山機(jī)械中的液壓傳動(dòng) 1
1.3 LMXC-I型露天選采機(jī)的概述 3
第2章 液壓系統(tǒng)設(shè)計(jì)計(jì)算 5
2.1 技術(shù)要求 5
2.1.1 LMXC-I型滾筒式露天選采機(jī)液壓傳動(dòng)系統(tǒng)綜述 5
2.1.2 液壓傳動(dòng)系統(tǒng)的設(shè)計(jì)參數(shù) 5
2.2 系統(tǒng)功能設(shè)計(jì) 5
2.2.1 確定主要參數(shù) 5
2.2.2 擬訂液壓系統(tǒng)原理圖 14
2.3 組成元件設(shè)計(jì) 16
2.3.1 主液壓泵及其驅(qū)動(dòng)電動(dòng)機(jī)的確定 16
2.3.2 整個(gè)液壓系統(tǒng)中各液壓缸動(dòng)作情況 20
2.3.3 液壓控制閥的選擇 21
2.3.4 管路的選擇、布置與連接 22
2.3.5 油箱及其組件的設(shè)計(jì) 24
2.3.6 液壓泵組的結(jié)構(gòu)設(shè)計(jì) 31
2.4 驗(yàn)算液壓系統(tǒng)技術(shù)性能 32
2.4.1 系統(tǒng)效率的估算 32
2.4.2 發(fā)熱溫升估算及熱交換器的選擇 33
第3章 液壓系統(tǒng)的使用和維護(hù) 36
3.1 注意事項(xiàng) 36
3.2 液壓系統(tǒng)常見故障及排除方法 36
結(jié) 論 39
致 謝 40
參考文獻(xiàn) 41
附錄1 42
附錄2 46
摘 要
由于我國露天煤礦存在大量的復(fù)合煤層，而目前對(duì)復(fù)合煤層的開采還缺少必要的手段和設(shè)備，使得露天煤礦的回采率難于提高。因此迫切需要研究開發(fā)針對(duì)復(fù)合煤層開采的設(shè)備，需要研制出可精確地、選擇性地開采獨(dú)立礦層，適合含有矸石夾層的復(fù)合煤層的開采新型露天煤礦開采設(shè)備。LMXC-I型露天選采機(jī)是在滾筒式露天采煤機(jī)的基礎(chǔ)上研究開發(fā)出來的新機(jī)型，它可以有效地開采復(fù)合煤層，提高露天煤礦的回采率。LMXC-I型露天選采機(jī)的截割部和機(jī)身升降、行走履帶的驅(qū)動(dòng)和轉(zhuǎn)載機(jī)的回轉(zhuǎn)及升降均采用液壓傳動(dòng)技術(shù)，該液壓系統(tǒng)采用開式系統(tǒng)。行走機(jī)構(gòu)共四條履帶，采用雙泵和電液控制，能夠方便靈活地實(shí)現(xiàn)前進(jìn)后退及轉(zhuǎn)向。截割部、機(jī)身升降以及轉(zhuǎn)載機(jī)的回轉(zhuǎn)及升降均由同一個(gè)泵供油，并采用多路閥操縱控制。選采機(jī)能精確地水平切削一定深度的巖體，實(shí)現(xiàn)對(duì)煤、巖的分層選采，還能一次性完成礦體的破碎及裝車，極大地提高了露天煤礦的經(jīng)濟(jì)效益。
關(guān)鍵詞 露天煤礦 復(fù)合煤層 選采機(jī) 液壓傳動(dòng)
Abstract
Since China's surface mine exist a large number of complex seam，at present，while the composite coal mining is in lack of the necessary means and equipment，it makes recovery rate of the surface mine difficult to raise. There is an urgent need to make a research and exploration to the mining equipment of complex seam，the requirement of which are precise，mining independent seam selectively，and this new equipment should be suitable for mining complex seam containing ore. LMXC-I-open mining-selection machine is new model which researched and developed on the basis of the roller open shearer，it can effectively mining complex coal，improve the recovery rate of surface mine. The cutting department and the fuselage movements，running track and republish the driving machine and the rotary movements of LMXC - I-open mining-selection machine are used hydraulic driving technology，the hydraulic system uses open system. Include a total of four walking tracks，double-pump and electro-hydraulic control system, flexible and convenient way to achieve moving and retreating. Movement of the cutting department and the fuselage department，and rotary movement of the landing reproduced machine are driving by the same pump, multi-way valve manipulation. Election mining machine could cut the depth of the rock on level precisely，and achieve elective mining on coal and rock，it can complete the ore crushing and loading in the same time，which would greatly improve the cost-effectiveness of the surface mine.
Key words surface mine complex seam mining-selection machine hydraulic drive
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