【正文】
.................. 1 國外液壓支架電液控制系統(tǒng)發(fā)展概況 ............................................ 1 國內液壓 支架電液控制系統(tǒng)發(fā)展概況 ............................................ 3 液壓支架電液控制系統(tǒng)發(fā)展趨勢 ................................................... 4 液壓支架電磁閥的發(fā)展概況 .......................................................... 4 本課題的研究背景及意義 ....................................................................... 6 本論文研究主要工作 .............................................................................. 7 本章小結 ................................................................................................ 8 2 液壓支架電液控制系統(tǒng) .................................................................................... 9 液壓支架電液控制系統(tǒng)的特點 ................................................................ 9 液壓支架電液控制系統(tǒng)的組成 .............................................................. 10 我國液壓支架電液控制 系統(tǒng)發(fā)展緩慢的原因及攻關難點 ........................ 12 對我國發(fā)展支架電液控制技術的建議 .................................................... 13 本章小結 .............................................................................................. 15 3 液壓 支架電液控制閥 ...................................................................................... 16 電液控制閥的設計原理 ......................................................................... 16 電液控制閥的結構設計 ......................................................................... 16 電液控制閥的工 作原理 ......................................................................... 19 本章小結 .............................................................................................. 20 4 電液控制閥先導閥的工作原理及設計 ............................................................. 21 電磁先導閥的相關設計 ......................................................................... 21 電磁先導閥的設計原理 ............................................................... 21 電磁先導閥的結構設計 ............................................................... 21 電液控制閥先導閥的工作 原理 ..................................................... 24 電磁先導閥的設計及相關計算 .............................................................. 25 電磁先導閥電磁鐵的選擇 ............................................................ 25 電磁先導 閥電磁鐵的相關參數設計計算 ....................................... 25 電磁先導閥復位彈簧的相關參數設計計算 ................................... 32 本章小結 .............................................................................................. 36 5 總結和展望 .................................................................................................... 37 總結 ..................................................................................................... 37 展望 ..................................................................................................... 37 參考文獻 ........................................................................................................... 39 II 致 謝 ........................................................................................................... 40 附錄 .................................................................................................................. 41 本科生畢業(yè)設計(論文) 1 1 緒論 液壓支架電液控制系統(tǒng)發(fā)展概況 國外液壓支架電液控制系統(tǒng)發(fā)展概況 國外支架電液控制系統(tǒng)發(fā)展于 70年代中期 , 英國煤炭局首先提出研制電子控制液壓支架 , 1981 年澳大利亞的科里曼爾煤礦最先將電子控制的液壓支架用于長壁綜采工作面。 關鍵詞: 液壓支架;電液控制;電磁先導閥 Abstract Coal mining has entered the era of fully mechanizing mining nowadays. Hydraulic Support(HS) is greatly used in fully mechanized coal mining equipment. And the core technologies of electro hydraulic control system in HS had got a great development. But this technology has fall behind in our country. The electro hydraulic system of the HS is imported abroad. The imported system is expensive, which increase the whole cost of the HS deeply. As an key ponent in electro hydraulic control system, realize the Pilot Solenoid Valve(PSV)home made is the main task to reduce the cost and gain more market for domestic panies. The main content of this topic is about electromagic pilot valve design innovation. According to the thesis research points, the thesis is divided to five parts to introduce the relative contents. In the first chapter, the electrohydraulic control system of the hydraulic support research situation and development prospect are introduced. Also the development of hydraulic support electromagic valve is introduced. And summarizes the current research background、 significance and purpose of the research contents. In the chapter two , the electrohydraulic control system and the characteristics of the position are introduced. Analyze the reasons why hydraulic support electriccontrol system got a low development. In the chapter three, design the whole structure of PSV. And get analysis of the working principle. In the chapter four, first to design electromagic precursor valve, on the basis of the existing MARCO valve to change control mouth from inclined to straight, then design calculation the electromag and the reposition spring of electromagic precursor valve. In the chapter five, some conclusions about this research work are introduced; also the future work is pointed out. Key words: Hydraulic Support。 第四章先對電磁先導閥進行設計,在現(xiàn)有 MARCO 閥的基礎上改控制口斜油道為直油道,分析工作原理,然后根據具體工作需求對電磁先導閥內部的電磁鐵及復位彈簧進行設計計算。 第二章對電液控制系統(tǒng)的特點及組成進行簡要介紹,分析我國液壓支架電液控制系統(tǒng)發(fā)展緩慢的原因及攻關難點,并在此基礎上提出對國內發(fā)展液壓支架電 液控制技術的建議。本課題主要內容是對控制閥中的電磁先導閥進行設計創(chuàng)新,根據課題的內容和特點,本論文分五個章節(jié)來闡述。然而 , 這項技術在我國的發(fā)展卻相對緩慢,國內液壓支架電液控制系統(tǒng)目前主要從國外引進,進口 電液控制系統(tǒng)價格昂貴,維護維修成本高,導致液壓支架成本的急劇增加。 答辯思路清晰,論點基本正確,能正確回答主要問題。 該生具有較強的獨立工 作能力,很好地完成了設計任務書中提出的主要內容和要求,同意進行答辯和申請工學學士學位。 成績: 87 指導教師簽名: 年 月 日 學院 機電與信息工程學院 專業(yè) 機械工程及自動化 班級 2