摘 要MGTY400/900-3.3D 型采煤機是一種電牽引大功率采煤機，該機機身矮，裝機功率大，采用大角度彎搖臂設(shè)計，加大了過煤空間，提高了裝煤效果，機械傳動都是直齒傳動，傳動效率高，容易安裝和維護。本次設(shè)計以 MGTY400/900-3.3D 型電牽引型采煤機截割部為設(shè)計對象,采煤機截割部主要是由四級齒輪傳動組成,電動機輸出的動力經(jīng)由兩級直齒圓柱齒輪和雙級行星輪系的傳動，最后驅(qū)動滾筒旋轉(zhuǎn)。設(shè)計任務(wù)有：一初步確定設(shè)計方案；二是通過查找有關(guān)資料及設(shè)計手冊設(shè)計計算截割部的傳動系統(tǒng)。在設(shè)計過程中，對截割部的軸、傳動齒輪、軸承和聯(lián)接用的花鍵等部件進行了設(shè)計計算、強度校核和選用。同時在計算過程中我們應(yīng)該正確應(yīng)用設(shè)計手冊，認真計算每個過程的具體數(shù)據(jù)，確保設(shè)計數(shù)據(jù)的準確率，達到設(shè)計所要求的目的。關(guān)鍵字：采煤機 截割部 減速器 行星輪 齒輪iAbstractMGTY400/900-3.3D Shearer is a high-power electric traction shearer with a short body and strong power. And it was designed with a wide-angle rocker arm, so that the space to deliver the coal was expanded, and the coal loading speed was efficiently improved. Mechanical transmission is a straight transmission with high transmission efficiency, easy to install and maintain.This research takes the cutting unit of MGTY400/900-3.3D type electric traction shearer as the design object. The cutting unit is mainly composed of four - stage of gear transmission. The motor’s output power passes through two-stage of spur gears transmission and two-stage planetary gear train transmission, finally, rotates the drive rollers .The targets of the research: first, determine the basic design scheme. Second, design the transmission system of the cutting part by looking up some relevant information. In the process, we will design, choose and check the parts of shearer ,such as axle,transmission gears, bearings, the spline and so on. At the same time, we should make good use of the design manual when calculating, carefully calculate each specific data, ensure the accuracy of design data, and finally reaches the design requirements.Key words：Coal mining machines Cutting Department Reducer Planetary gear Gearii目 錄緒 論 1第一章 MGTY400/900— 3.3D 型采煤機整機概述 .3第一節(jié) 采煤機的組成與特點 .3第二節(jié) 采煤機的工作面布置情況及工作過程 .6第三節(jié) 采煤機的主要技術(shù)特征 .7第二章 采煤機截割部設(shè)計的原則和依據(jù) 11第一節(jié) 采煤機截割部總體設(shè)計原則 .11第二節(jié) 傳動方案設(shè)計 13第三節(jié) 傳動零件的設(shè)計計算 17第三章 采煤機附屬裝置 .79第一節(jié) 輔助液壓系統(tǒng)作用 79第二節(jié) 調(diào)高油缸 83第三節(jié) 冷卻系統(tǒng) .84第四章 采煤機的運輸、操作與檢修 .88第一節(jié) 運輸 88第二節(jié) 井上井下檢查與運輸 89第三節(jié) 采煤機的啟動、操作和停機 90第四節(jié) 采煤機的維護 91結(jié)束語 .95參考文獻 .96英文文獻 .97中文翻譯 100結(jié) 論 103致 謝 104