課程設(shè)計(jì)-機(jī)械設(shè)計(jì)設(shè)計(jì)膠帶輸送機(jī)的傳動(dòng)裝置(存儲(chǔ)版)
【正文】 β= mt=mn/cosβ=2/=, mt= a齒寬： 取 （二）低速級(jí)齒輪的設(shè)計(jì)：根據(jù)工作條件及其載荷性質(zhì)選擇小齒輪 40Cr 調(diào)質(zhì)處理 280HBS大齒輪 45鋼 正火處理 230HBS應(yīng)力循環(huán)次數(shù): 取失效概率為1%，取接觸強(qiáng)度計(jì)算的最小安全值：SHmin= 由[2]圖1021（d）得：,由[2]圖1019得：，由圖516b，得,計(jì)算許用接觸應(yīng)力: 因，故取小輪轉(zhuǎn)矩： T3=按Z1=29，Z2=96, 得，得YN1=，YN2=mn=5mm,故YX1=YX2=取YST=， SFmin=計(jì)算許用彎曲應(yīng)力 YFa1=，YFa2=YSa1=，YSa2=計(jì)算Yβ，因 z1=29, z2=96, u=, mn= mm, z1=29， z2=96β=, β= mt=mn/cosβ=, mt= 齒寬： 取六、開(kāi)式齒輪的設(shè)計(jì)由[2]表101選擇得：小齒輪 40Cr 調(diào)質(zhì)處理 齒面硬度 241286HBS大齒輪 45鋼 正火處理 齒面硬度 162217HBS 傳動(dòng)比為： 應(yīng)力循環(huán)次數(shù):初選小輪的齒數(shù)為 Z1=20。d=600 m=5mm。選取軸的材料為45鋼，調(diào)質(zhì)處理?yè)?jù)[2]表153，取A=115，于是得： ｄ＝40ｍｍ一、低速軸外伸軸段： TC=KT== D點(diǎn)軸徑 因?yàn)橛幸粋€(gè)鍵槽， dD=48mm設(shè)計(jì)該點(diǎn)處軸徑48mm，故安全。Ⅶ剖面因鍵槽引起的應(yīng)力集中系數(shù)，查得 。中間軸軸承采用與低速軸軸承相同的壽命驗(yàn)算方法，通過(guò)驗(yàn)算之后，壽命夠用，可選用30211型。Dismissal.You can make a claim to an employment tribunal, even if you haven39。if you win the case.If you are thinking about signing up for s Premier League match at Chelsea on Sunday.I am going to be at the match tomorrow and I have asked to meet Yaya Toure, he told BBC Sport.For me it39。s plaint. In a statement the Russian side added: We found no racist insults from fans of CSKA.Age has reached the end of the beginning of a word. May be guilty in his seems to passing a lot of different life became the appearance of the same day。 Then in high school, think don39。嫌惡過(guò)自己的怯懦，最終卻發(fā)現(xiàn)有很多緣分，有很多錯(cuò)過(guò)，好像冥冥之中真的已經(jīng)注定。Baumgartner the disappointing news: Mission aborted. r plays an important role in this mission. Starting at the ground, conditions have to be very calm winds less than 2 mph, with no precipitation or humidity and limited cloud cover. The balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our daytoday weather lives. It will climb higher than the tip of Mount Everest ( miles/ kilometers), drifting even higher than the cruising altitude of mercial airliners ( miles/ kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.The supersonic descent could happen as early as Sunda.The weatheThe balloon will slowly drift to the edge of space at 120,000 feet ( Then, I would assume, he will slowly step out onto something resembling an Olympic diving platform.Below, the Earth bees the concrete bottom of a swimming pool that he wants to land on, but not too hard. Still, he39。t start planning... Those years, those days of do, finally, like youth, will end in our life. 此刻，天空是陰暗的，空氣里有著剛下過(guò)雨之后的清新因子。想要的，不想要的，界限明確，好像沒(méi)有什么可以撼動(dòng)自己。 Junior high school, thought to have a crush on just means that the real growth, but over the past three years later, his writing of alumni in peace, suddenly found that isn39。s governing body, has also ordered an immediate investigation into the referee39。s antiracism taskforce, is in London for the Football Association39。damagesbased agreement. In England and Wales, your solicitor can39。t agree with the disciplinary action your employer has taken against you（四）中間軸的強(qiáng)度校核中間軸的強(qiáng)度校核也與低速軸相同，采用相同的方法校核之后，驗(yàn)證軸的強(qiáng)度達(dá)到要求，可用。Ⅰ剖面產(chǎn)生的 τ= 45鋼的機(jī)械性能查得， ，絕對(duì)尺寸影響系數(shù)得， 表面質(zhì)量系數(shù)得，,，Ⅰ剖面安全系數(shù)： S= 取，所以剖面Ⅰ安全。查表81得查表83得。m, [n]=3300r/minn=960r/min所以取減速器高速軸外伸段直徑為d=32mm，長(zhǎng)度L=60mm。 d=600由[2]表102，按電機(jī)驅(qū)動(dòng)載荷稍有波動(dòng) 取KA= a=350mm
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