【正文】 輪的傳動比： 5. 減速箱內(nèi)低速級齒輪的傳動比： 說明：上面分配的傳動比僅為初步值。減速傳動： 。 修正螺旋角： 與初選β=130相近,ZH`Zβ可不修正. 齒輪分度圓直徑： 圓周速度： 由[2]表104得：取齒輪精度為8級。由[2]表105，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 = 基圓螺旋角: 計(jì)算齒面接觸應(yīng)力故安全。取端面壓力角：基圓螺旋角： 由式（539）計(jì)算中心距a,取中心距a=160mm。 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。得YX=。，則，符合要求 m取53. 齒輪主要幾何參數(shù) d1=100。計(jì)算轉(zhuǎn)矩為 TC=KT== d=32mm L=60mm 現(xiàn)初步估算軸的最小直徑。m, [n]=4000r/minn=取減速器低速軸外伸段直徑為d=48mm，長度L=84mm。C點(diǎn)軸徑 因?yàn)橛幸粋€鍵槽，軸徑加大5%：， dc= 設(shè)計(jì)該點(diǎn)處軸徑72mm，故安全。同理，Ⅵ和Ⅶ也按應(yīng)力集中系數(shù)較大的計(jì)算。（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 ， 。 S=[S]其它剖面與上述剖面相比，危險(xiǎn)性小，不予校核。八、滾動軸承的選擇及壽命驗(yàn)算(一)軸承的選擇：高速軸 滾動軸承30208 （GB/T29794）中間軸 滾動軸承30211 （GB/T29794）低速軸 滾動軸承30212 （GB/T29794）（二）軸承壽命驗(yàn)算（1）確定軸承的承載能力，軸承30212的 C=97800N（2）計(jì)算徑向支反力 R1= R2= （3）計(jì)算派生軸向力S： S=R/2Y 查手冊，30212軸承的Y=， C= 97800N ，e= （4）求軸承的軸向載荷A： 由結(jié)構(gòu)知 （5）計(jì)算軸承的當(dāng)量動載荷P：； 插值確定查表，查表，按傳動裝置查取 根據(jù)合成彎矩圖d,取N（6）校核軸承壽命因?yàn)? 故 按軸承2計(jì)算，查表， 滿足壽命要求。： K== =因，故安全。 your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, seeagainst the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept it.If you are worried about how the time limits apply to you, take advice from one of the organisations listed undert charge you more than 35% of your pensation To find your nearest CAB, including those that give advice by , click ons 150th anniversary celebrations and will attend City39。for the racist behaviour of their fans durings actions.CSKA said they were surprised and disappointed by Toure39?？傆X得自己自己似乎應(yīng)該去做點(diǎn)什么，或者寫點(diǎn)什么。t really grow up, it seems is not so important。Originally, this world, can produce a chemical reaction to an event, in addition to resolutely, have to do, and time.　　原來，這個世界上，對某個事件能產(chǎn)生化學(xué)反應(yīng)的，除了非做不可的堅(jiān)決，還有，時間。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。 Those were broken into various shapes of stationery。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。t. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters).cause there 38