【正文】 ound mining work in coal face, is the basis of mine production. Gently inclined and inclined coal seam in China accounted for a large proportion of the total coal. Mining gently inclined and inclined coal seam, widely adopted to longwall mining method. This requires all private coal mine machinery for mining, and transportation. We all know that transport of coal mine machinery working a heavy task, harsh working conditions. General mechanical work cannot be carried out in a well. Especially working face transport machinery, its major moving parts and working bodies (traction body and bearing body) high strength, stiffness, good toughness, abrasion resistance and corrosion resistance. According to these requirements, using chain as a conveyor of the traction ponent is appropriate. Scraper conveyor is to meet the special requirements and the birth of a coal mine machinery for transport. It low because the fuselage can be bent, transport capacity, high structural strength, able to adapt to a poor working environment in coal face and may orbit as a Shearer and widely. Reducer was used for the original work of motivation and a separate enclosure between drive unit. Due to reducer with pact, high transmission efficiency, driving accuracy and reliability, easy maintenance, and other characteristics, wide application in various mec hanical devices. Many types of reducer, to meet different requirements of various mechanical transmission. Standardized mon reducer from specialized factory mass production. Reducer is used primarily by driving part (gear or worm), bearings, box is posed of annexes. Role of scraper conveyor reducer is through a threestage gear deceleration (first class conical gears, cylindrical helical gear with second class, third class of spur gear) to change ing from the direction of motor speed, needed speed to be suitable for work machine, so that the whole machinery to better better plete the mission. 本科生畢業(yè)設(shè)計（論文） iii Keywords: scraper conveyor。減速器主要由傳動零件（齒輪或蝸桿等）、軸承、箱體極其附件組成。減速器的種類很多，用以滿足各種機械傳動的不同要求。 減速器是用于原動機和工作機之間的獨立的封 閉傳動裝置。而刮板輸送機就是為滿足這種特殊要求而誕生的一種煤礦運輸機械。特別是采掘工作面的運輸機械，要求其主要運動部件和工作機構(gòu)（牽引機構(gòu)及承載機構(gòu)）強度高、剛度大、韌性好、耐磨損、抗腐蝕。 眾所周知，煤礦井下運輸機械工作任務(wù)繁重，工作條件惡劣。開采緩斜及傾斜煤層，廣泛采用著走向長壁工作面采煤法。采煤工作面是井下進行采煤工作的地點，是礦井生產(chǎn)的基礎(chǔ)。而煤炭資源又是資源中的重中之重，因此，對煤炭資源的開采利用也就不可避免的成為世人關(guān)注的焦點。與此同時，對機械尤其是機械制造業(yè)的要求也更加復(fù)雜化、多元化。本科生畢業(yè)設(shè)計（論文） i 摘 要 隨著現(xiàn)代科技的不斷發(fā)展，機械行業(yè)的技術(shù)也日益更新。新方法、新技術(shù)不斷的出現(xiàn)。在現(xiàn)代工業(yè)生產(chǎn)中，對資源的利用已經(jīng)成為衡量工業(yè)發(fā)展的關(guān)鍵一環(huán)。然而，對煤炭的開采不同于其它，他是在井下進行工作。我國緩斜及傾斜煤層占煤炭總量的很大比重。這就需要各 種專用的煤礦機械進行開采、運輸。普通的機械無法在井下進行工作。根據(jù)這些要求，使用鏈條作為輸送機的牽引構(gòu)件比較合適。它由于機身低矮，可以彎曲，運輸能力大，結(jié)構(gòu)強度高，能適應(yīng)采煤工作面較惡劣的工作環(huán)境，并可作為采煤機的運行軌道而被廣泛應(yīng)用。由于減速器具有結(jié)構(gòu)緊湊、傳動效率高、傳動準(zhǔn)確可靠、使用維護方便等特點，故在各種機械設(shè)備中應(yīng)用甚廣。常用減速器已標(biāo)準(zhǔn)化，由專門工廠成批生產(chǎn)。 刮板輸送機的減速器的作用就是通過三級齒輪減速（第一級采用圓錐直齒輪，第二級采用圓柱斜齒齒輪，第三級采用圓柱直齒齒輪）來改變從電動機方向傳來的轉(zhuǎn)速，以得到適合工作機器所需要的轉(zhuǎn)速，使整個機械能更好更出色的完成工作使命。 gear； shaft 本科生畢業(yè)設(shè)計（論文） iv 目錄 第一章 前 言 ................................................................................................................. 1 刮板輸送機的現(xiàn)狀及發(fā)展趨勢 ................................................................................... 1 刮板輸送機的優(yōu)缺點 ................................................................................................... 3 圓環(huán)鏈傳動的特點 ....................................................................................................... 4 第 二章 減速器的總體設(shè)計 ......................................................................................... 6 電機功率計算 ............................................................................................................ 6 總傳動比 .................................................................................................................... 7 各軸轉(zhuǎn)速，轉(zhuǎn)矩與輸入功率 .................................................................................... 7 第三章 齒輪設(shè)計 .......................................................................................................... 10 圓錐齒輪傳動的設(shè)計計算 ........................................................................................ 10 斜齒圓柱齒輪傳動的設(shè)計計算 ................................................................................ 14 直齒圓柱齒輪傳動的設(shè)計計算 ................................................................................ 18 第四章 軸的計算 .......................................................................................................... 24 第一軸 ...................................................................................................................... 24 第二軸 ...................................................................................................................... 25 第三軸 ...................................................................................................................... 26 第四軸 ...................................................................................................................... 26 第五章 軸的強度校核 ................................................................................................. 28 求軸上的轉(zhuǎn)矩 ............................................................................................................. 28 計算軸上的載荷 ........................................................................................................ 28 按彎扭合成校核軸的強度 ........................................................................................ 30 精確校核軸的疲勞強度 . ........................................................................................... 31 第六章 結(jié)構(gòu)設(shè)計 .......................................................................................................... 33 驅(qū)動裝置位置的確定 ................................................................................................ 33 刮板輸送機結(jié)構(gòu)的基本要求 .................................................................................... 36 機頭部 ......................................................................................................................