露天選采機液壓系統設計

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展 1
 1.2 礦山機械中的液壓傳動 1
 1.3 LMXC-I型露天選采機的概述 3
第2章 液壓系統設計計算 5
 2.1 技術要求 5
 2.1.1 LMXC-I型滾筒式露天選采機液壓傳動系統綜述 5
 2.1.2 液壓傳動系統的設計參數 5
 2.2 系統功能設計 5
 2.2.1 確定主要參數 5
 2.2.2 擬訂液壓系統原理圖 14
 2.3 組成元件設計 16
 2.3.1 主液壓泵及其驅動電動機的確定 16
 2.3.2 整個液壓系統中各液壓缸動作情況 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 油箱及其組件的設計 24
 2.3.6 液壓泵組的結構設計 31
 2.4 驗算液壓系統技術性能 32
 2.4.1 系統效率的估算 32
 2.4.2 發熱溫升估算及熱交換器的選擇 33
第3章 液壓系統的使用和維護 36
 3.1 注意事項 36
 3.2 液壓系統常見故障及排除方法 36
結  論 39
致  謝 40
參考文獻 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合煤層，而目前對復合煤層的開采還缺少必要的手段和設備，使得露天煤礦的回采率難于提高。因此迫切需要研究開發針對復合煤層開采的設備，需要研制出可精確地、選擇性地開采獨立礦層，適合含有矸石夾層的復合煤層的開采新型露天煤礦開采設備。LMXC-I型露天選采機是在滾筒式露天采煤機的基礎上研究開發出來的新機型，它可以有效地開采復合煤層，提高露天煤礦的回采率。LMXC-I型露天選采機的截割部和機身升降、行走履帶的驅動和轉載機的回轉及升降均采用液壓傳動技術，該液壓系統采用開式系統。行走機構共四條履帶，采用雙泵和電液控制，能夠方便靈活地實現前進后退及轉向。截割部、機身升降以及轉載機的回轉及升降均由同一個泵供油，并采用多路閥操縱控制。選采機能精確地水平切削一定深度的巖體，實現對煤、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濟效益。
 
 關鍵詞   露天煤礦  復合煤層  選采機  液壓傳動
 
 
 
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