【正文】 工作面的重要支護設(shè)備，其技術(shù)的改進與革新在飛速的發(fā)展。 液壓支架有許多類型結(jié)構(gòu)。支架液壓系統(tǒng)包括操縱閥、液控單向閥、安全閥、側(cè)壓閥和供液回液軟管等。 采煤工作面用的液壓支架是一種復(fù)雜的煤礦機械。根據(jù)我國社會發(fā)展的需求．要把我國建設(shè)為“資源節(jié)約型，環(huán)境友好型”的社會，煤炭工業(yè)面臨著歷史性的挑戰(zhàn)與機遇，經(jīng)歷著關(guān)鍵性的轉(zhuǎn)變。在未來新能源大規(guī)模利用之前。 electrohydraulic control system。從而設(shè)計出結(jié)構(gòu)更合理的球面密封電磁先導(dǎo)閥。并對平面、錐面、球面密封三種電磁先導(dǎo)閥進行了一系列比較，選取球面密封電磁先導(dǎo)閥作為此次設(shè)計對象。 i 液壓支架用電磁先導(dǎo)閥設(shè)計 摘要 電磁先導(dǎo)閥作為電液控制系統(tǒng)的 控制元件， 在液壓電液控制系統(tǒng)中起到了重要作用。本文在查閱大量國內(nèi)外文獻基礎(chǔ)上，對液壓支架電液控制系統(tǒng)的工作原理、發(fā)展歷程及其優(yōu)點進行了闡述。并 從電磁先導(dǎo)閥的結(jié)構(gòu)入 手，通過對其結(jié)構(gòu)和工作原理的分析，完成了對電磁先導(dǎo)閥的受力分析、 結(jié)構(gòu) 設(shè)計和幾何尺寸計算 。 關(guān)鍵詞：電磁先導(dǎo)閥、電 液控制系統(tǒng)、結(jié)構(gòu)設(shè)計 ii A Design of Electromagic Pilot Valve for Hydraulic Roof Supports Abstract As the control ponents of electrohydraulic control system, electromagic pilot valve plays an important role in electrohydraulic control system. This paper is based on the reading of a large number of domestic and foreign literature, the working principle , the development process and the advantages of the hydraulic supports electrohydraulic control system are described. I carried out a series of parison of flat sealed, conical sealed , spherical sealed of the electromagic pilot valve. Select the spherical sealed electromagic pilot valve as the design object. I start my work from the structure of the electromagic pilot valve, plete force analysis , structural design and calculation geometry through analyzing its structure and working principle. In order to design electromagic pilot valve of spherical sealed , that is more reasonable structure. Key Words: electromagic pilot valve。 structural design iii 目錄 摘要 ............................................................................................................................................. i Abstract ........................................................................................................................................ii 目錄 ............................................................................................................................................ iii 第一章 緒論 ................................................................................................................................ 1 液壓支架電液控制系統(tǒng) .................................................................................................... 2 液壓支架電液控制系統(tǒng)的組成與 原理 .................................................................... 2 液壓支架電液控制系統(tǒng)的發(fā)展歷程 ......................................................................... 3 液壓支架電液系統(tǒng)的優(yōu)點 ...................................................................................... 4 我 國液壓支架電液控制 系統(tǒng)的攻關(guān)難點 ................................................................. 5 液壓支架用電磁先導(dǎo)閥的概述及其存在的問題 ................................................................ 5 電磁先導(dǎo)閥的概述 ................................................................................................. 5 電磁先導(dǎo)閥存 在的問題 .......................................................................................... 5 選題的目的與意義 .......................................................................................................... 6 ........................................................................................................... 6 第二章 總體方案的設(shè)計 ............................................................................................................. 7 液壓閥的基本知識 .......................................................................................................... 7 液壓閥的性能參數(shù) ................................................................................................. 7 對液壓閥的基本要求 ............................................................................................. 7 換向閥的性能 ....................................................................................................... 7 2． 2 幾種換向閥的比較 ....................................................................................................... 9 平面密封型（滑閥） .............................................................................................. 9 錐面密封型 .......................................................................................................... 11 球面密封型 ..........................................................................................................12 第三章 先導(dǎo)閥的力學(xué)分析 ..........................................................................................................14 穩(wěn)態(tài)液動力的計算 .........................................................................................................14 閥體各狀態(tài)下的力學(xué)分析 ..............................................................................................16 第四章 彈簧的設(shè)計與計算 .....................................................................................................25 . 彈簧的設(shè)計 ...................................................................................................................25 材料的選擇 ..........................................................................................................25 彈簧的熱處理 ......................................................................................................25 彈簧的計算 ...................................................................................................................26 第五章 先導(dǎo)閥的結(jié)構(gòu)分析與設(shè)計 ..............................................................................................28 第六章 電磁鐵的設(shè)計與計算 ......................................................................................................31 概述 ..............................................................................................................................31 電磁鐵的計算 ................................................................................................................32 總結(jié)與展望 .................................................................................................................................40 參考文獻 .....