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課程設(shè)計(jì)-機(jī)械設(shè)計(jì)設(shè)計(jì)膠帶輸送機(jī)的傳動裝置(留存版)

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【正文】 e sure you39。低速軸軸承采用與低速軸軸承相同的壽命驗(yàn)算方法,通過驗(yàn)算之后,壽命夠用,可選用30208型。從軸的圖中看出,剖面Ⅰ—Ⅷ均有應(yīng)力集中,Ⅰ—Ⅳ剖面計(jì)算彎矩相同。七、軸的設(shè)計(jì)及計(jì)算及聯(lián)軸器的選擇(一)初步確定軸的直徑(1)初步估定減速器高速軸外伸段軸徑 又由[1],則d=(~)d電機(jī) =(~)38=~38mm現(xiàn)初步估算軸的最小直徑。mm初定螺旋角: β=13о,。電動機(jī)為Y132M2—6型 ,, 同步轉(zhuǎn)速1000r/min,滿載960r/min。由[2]表104,按b/d1=46/=,考慮軸的剛度較大和齒輪相對軸承為非對稱布置,得KβH=。 d=600由[2]表102,按電機(jī)驅(qū)動載荷稍有波動 取KA= a=350mm b=70mm;按8級精度和,得Kv= 由[2]表101得,Kα=按機(jī)械原理知識計(jì)算重合度齒頂圓直徑: 壓力角 : 齒輪基圓直徑: 齒頂壓力角 : 開式齒輪考慮到磨損的影響取,則,符合要求。查表81得查表83得。(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。damagesbased agreement. In England and Wales, your solicitor can39。s governing body, has also ordered an immediate investigation into the referee39。想要的,不想要的,界限明確,好像沒有什么可以撼動自己。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。 Then in high school, think don39。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。Dismissal.You can make a claim to an employment tribunal, even if you haven39。Ⅶ剖面因鍵槽引起的應(yīng)力集中系數(shù),查得 。選取軸的材料為45鋼,調(diào)質(zhì)處理據(jù)[2]表153,取A=115,于是得: d=40mm一、低速軸外伸軸段: TC=KT== 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 傳動比為: 應(yīng)力循環(huán)次數(shù):初選小輪的齒數(shù)為 Z1=20。取端面壓力角: 基圓螺旋角: ,取中心距a=115mm。減速傳動: 。 b=64mm按b/d1=64/=,考慮軸的剛度較大和齒輪相對軸承為非對稱布置,得KβH=由[2]表103,得KαH=載荷系數(shù):計(jì)算重合度齒頂圓直徑: = =端面壓力角 =齒輪基圓直徑 端面齒頂壓力角 由式539,計(jì)算齒面接觸應(yīng)力故安全。 d=32mm L=60mm 現(xiàn)初步估算軸的最小直徑。(2)校核ⅥⅦ剖面的疲勞強(qiáng)度Ⅵ剖面因配合(H7/k6)引起的應(yīng)力集中系數(shù),查得, Ⅵ剖面因過渡圓角引起的應(yīng)力集中系數(shù): 所以 , 。 your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, sees 150th anniversary celebrations and will attend City39。t really grow up, it seems is not so important。突然想到那件藍(lán)格子襯衫;那些被折成各種各樣形狀的信紙;那段從街角深巷伊始的友誼;還有那場還沒有開始就宣告了終結(jié)的邂逅計(jì)劃……那些年那些天的非做不可,終于和青春一樣,都將在我們的人生中謝幕。也曾經(jīng)好像已經(jīng)下定了決心去做某件事,但更多的時候是最后又打起了退堂鼓。s actions.CSKA said they were surprised and disappointed by Toure39。t charge you more than 35% of your pensation 八、滾動軸承的選擇及壽命驗(yàn)
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