【正文】 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。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。 Then in high school, think don39。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。re clear about the terms of the agreement. It might be best to get advice from an experienced adviser, for example, at a Citizens Advice Bureau. To find your nearest CAB, including those that give advice by , click on nearest CAB. For more information about making a claim to an employment tribunal, see Employment tribunals. The (lack of) air up there Watch mCayman Islandsbased Webb, the head of Fifa39。從按照雙級(jí)減速箱的傳遞效率、傳遞功率等工作要求到對(duì)各個(gè)零件進(jìn)行機(jī)構(gòu)設(shè)計(jì)，會(huì)涉及多方面的事情，既要考慮制造成本，又要考慮工藝的合理性，在計(jì)算的過(guò)程中也比較容易出錯(cuò)。161933 旋向 左旋 右旋 右旋 左旋 分度圓直徑（ mm） 五、軸的結(jié)構(gòu)設(shè)計(jì)計(jì)算 （一）高速軸的機(jī)構(gòu)設(shè)計(jì)計(jì)算 由于高速軸上的齒輪直徑接近于軸徑，故將軸設(shè)計(jì)為齒輪軸。39。選大齒輪齒數(shù) 21 25 * iZ? ? ?取 2Z =94 4）粗選螺旋角 ? =15176。確定模數(shù)為 mn= 幾何尺寸計(jì)算 1） 中心距 ( 2 5 9 4 ) / ( 2 c o s ) 2 . 5 ( 2 5 9 4 ) / 2 c o s 1 5 1 5 2 . 7155nama m m ?? ? ? ? ? ? ?? （ ）取 2） 修正螺旋角 1 1 , , ,c os [ ( 25 94 ) / ( 2 ] c os [ 2. 5 25 94 / ( 2 15 5 ) ] 16 19 33nma? ??? ? ? ? ? ? ?） （ ） 4) 分度圓直徑 39。 9（ 7） . 帶的設(shè)計(jì) 小帶輪： 小帶輪為實(shí)心式，中心 孔的直徑 d=42mm 為電動(dòng)機(jī)的軸徑，輪轂長(zhǎng)度 l=50. 大帶輪： 大帶輪為腹板式，中心孔 d=55mm,輪轂長(zhǎng)度 l=60mm 四、齒輪傳動(dòng)設(shè)計(jì)計(jì)算 （采用斜齒） 第一組齒輪 減速器高速級(jí)齒輪傳動(dòng)比為 ? ，高速軸轉(zhuǎn)速512 .46 / m inInr? ，傳動(dòng)功率為 kW? 選定齒輪類型、精度等級(jí)、材料及齒數(shù) 1）大小齒輪都選用硬齒面。 3）、求大，小帶輪基準(zhǔn)直 徑 d2,d1 并驗(yàn)算帶速 V (1)、由表 ， d1 應(yīng)不小于 75mm，現(xiàn)取 d1=112mm 21d id? = 112= mm 取 d2=315mm （ 2）、驗(yàn)算帶速 v 11 3 .1 4 1 1 2 1 4 4 0 / 8 .4 4 /6 0 1 0 0 0 6 0 1 0 0 0mdnv m s m s? ?? ??? ? ??? ，符合。 321 iiii? 由此可算得 ?? ， 各軸轉(zhuǎn)速 ?n ＝ 1/inm ＝ 1440/＝ Ⅱn ＝ 2/?、?in ＝ ＝ Ⅲn ＝ Ⅱn / 3i ＝ 各軸輸入功率 P= edP = kw ⅠP ＝ dp 1? ＝ ＝ ⅡP ＝ Ⅰp η 2 3? ＝ ＝ ⅢP ＝ ⅡP η 2 3? ＝ ＝ 4P = ⅢP 1? 3? = = 各軸轉(zhuǎn)矩 電動(dòng)機(jī)軸的輸出轉(zhuǎn)矩 1T =9550mednP =9550 此設(shè)備兩班制工作，工作 期限八年，戶內(nèi)使用。由參考書中表查得： 彈性聯(lián)軸器 1 ?? ； 滾子軸承 2 ? ? ； 圓柱齒輪傳動(dòng) ?? ； 滾筒效率 4? = V帶傳動(dòng) 5 ? ? 電動(dòng)機(jī)輸出功率： /dwPp?? 總 =由課程設(shè)計(jì)書中查得電動(dòng)機(jī)額定功率 Ped = 電動(dòng)機(jī)型號(hào) 額定功率kw 滿載轉(zhuǎn)速r/min 總傳動(dòng)比 減速器傳動(dòng)比 Y132M26 960 Y132S4 1440 由表中的數(shù)據(jù)可知，兩種方案均可以。 m 2T = ＝ 159176。 0 . 8 。39。 1 . 5 91 0 . 8 1 . 4 1 . 5 9 1 . 5 2 6A V FVFK K K KK K K K K ????? ? ? ?? ? ? ? ? ? 7) 齒形系數(shù) YFa 和應(yīng)力校正系數(shù) Ysa 當(dāng)量齒數(shù) 311 / 26 .7 9VZ Z CO S ??? ， 322 / 10 0. 7VZ Z C O S ??? 用內(nèi)差法得 YFa1=， YFa2=， Ysa1=， Ysa2= 8) 螺旋角影響系數(shù) Yβ 軸面重合度 10 . 3 1 8 ta n 1 . 4 9 , 11 / 1 2 0 0 . 8 7 5dzY ??? ? ? ???? ? ?? ? ? ?取 4）許用彎曲應(yīng)力［б F］， 查圖 得 KFN1=， K,FN2= ? 15查表 得 l im 1 l im 2 690 , F FM P a S?? ? ? ?取 安 全 系 數(shù),則1 1 l i m 12 2 l i m 2[ ] * / 3 7 0 . 8 7 5[ ] * / 3 7 9 . 5 aF F N F FF F N F FK S M P aK S M P???? 5)確定 1 1 12 2 1/ [ ] ,/ [ ] 111/ [ ] 105 3F S FF a Sa FF a F a FYYYYYY?? ?????取 0,0111 計(jì)算 5 計(jì)算模數(shù) ? ?21113 21132322 c o s2 1 .5 2 6 3 4 7 .3 1 1 0 0 .8 7 5 c o s 1 5 0 .0 1 1 10 .7 1 .6 4 4 2 52 .3 7F a F andFkTm??? ? ?????? ? ? ? ? ?????（ ） 比較兩種強(qiáng)度的計(jì)算結(jié)果。161933 39。 九、潤(rùn)滑與密封 (潤(rùn)滑與密封方式的選擇、潤(rùn)滑劑的選擇 ) 雙級(jí)減速器內(nèi)傳動(dòng)零件 (齒輪 )采用浸油潤(rùn)滑，因地級(jí)速齒輪速度 26為 ,采用的浸油深度應(yīng)為 )31~61(?sh輪齒半徑。t agree with the disciplinary action your employer has taken against you ? your employer dismisses you and you think that you have been dismissed unfairly. For more information about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven39。s 21 win. Michel Platini, president of European football39。 The end of our life, and can meet many things really do? 而窮盡我們的一生，又能遇到多少事情是真正地非做不可？ During my childhood, think lucky money and new clothes are necessary for New Year, but as the advance of the age, will be more and more found that those things are optional。s time, your ideas are always special to clear. Want, want, line is clear, as if nothing could shake his. Also once seemed to be determined to do something, but more often is he backed out at last. Dislike his cowardice, finally found that there are a lot of love, there are a lot of miss, like shadow really have been doomed. Those who do, just green years oneself give oneself an arm inj