畢業(yè)論文三級圓柱圓錐齒輪減速器設(shè)計(jì)

1、1 緒論通過查閱一些文獻(xiàn)我們可以了解到帶式傳動裝置的設(shè)計(jì)情況，為我所要做的課題確定研究的方向和設(shè)計(jì)的內(nèi)容。1.1 帶傳動帶傳動是機(jī)械設(shè)備中應(yīng)用較多的傳動裝置之一，主要有主動輪、從動輪和傳動帶組成。工作時(shí)靠帶與帶輪間的摩擦或嚙合實(shí)現(xiàn)主、從動輪間運(yùn)動和動力的傳遞。帶傳動具有結(jié)構(gòu)簡單、傳動平穩(wěn)、價(jià)格低廉、緩沖吸振及過載打滑以保護(hù)其他零件的優(yōu)點(diǎn)。1.2圓錐-圓柱齒輪傳動減速器YK系列圓錐-圓柱齒輪傳動減速器適用的工作條件：環(huán)境溫度為-4040度；輸入軸轉(zhuǎn)速不得大于1500r/min,齒輪嚙合線速度不大于25m/s，電機(jī)啟動轉(zhuǎn)矩為減速器額定轉(zhuǎn)矩的兩倍。YK系列的特點(diǎn)：采用一級圓弧錐齒輪和一、二、三級圓柱

2、齒輪組合，把錐齒輪作為高速級（四級減速器時(shí)作為第二級），以減小錐齒輪的尺寸；齒輪均采用優(yōu)質(zhì)合金鋼滲碳淬火、精加工而成，圓柱齒輪精度達(dá)到GB/T10095中的6級，圓錐齒輪精度達(dá)到GB/T11365中的7級；中心距、公稱傳動比等主要參數(shù)均采用R20優(yōu)先數(shù)系；結(jié)構(gòu)上采用模塊式設(shè)計(jì)方法，主要零件可以互換；除底座式實(shí)心輸出軸的基本型外，還派生出輸出軸為空心軸的有底座懸掛結(jié)構(gòu)；有多中潤滑、冷卻、裝配型式。所以有較大的覆蓋面，可以滿足較多工業(yè)部門的使用要求。減速器的選用原則：（1）按機(jī)械強(qiáng)度確定減速器的規(guī)格。減速器的額定功率P1N 是按載荷平穩(wěn)、每天工作小于等于10h、每小時(shí)啟動5次、允許啟動轉(zhuǎn)矩為工作轉(zhuǎn)

3、矩的兩倍、單向運(yùn)轉(zhuǎn)、單對齒輪的接觸強(qiáng)度安全系數(shù)為1、失效概率小于等于1%等條件算確定.當(dāng)載荷性質(zhì)不同，每天工作小時(shí)數(shù)不同時(shí)，應(yīng)根據(jù)工作機(jī)載荷分類按各種系數(shù)進(jìn)行修正.減速器雙向運(yùn)轉(zhuǎn)時(shí)，需視情況將P1N乘上0.71.0的系數(shù)，當(dāng)反向載荷大、換向頻繁、選用的可靠度KR較低時(shí)取小值，反之取大值。功率按下式計(jì)算：P2m=P2*KA*KS*KR ，其中P2 為工作功率； KA 為使用系數(shù)； KS 為啟動系數(shù)； KR 為可靠系數(shù)。（2）熱功率效核.減速器的許用熱功率PG適用于環(huán)境溫度20，每小時(shí)100%連續(xù)運(yùn)轉(zhuǎn)和功率利用律（指P2/P1N×100%）為100%的情況，不符合上述情況時(shí)，應(yīng)進(jìn)行修正。

4、（3）校核軸伸部位承受的徑向載荷。2結(jié)構(gòu)設(shè)計(jì)2.1V帶傳動帶傳動設(shè)計(jì)時(shí)，應(yīng)檢查帶輪的尺寸與其相關(guān)零部件尺寸是否協(xié)調(diào)。例如對于安裝在減速器或電動機(jī)軸上的帶輪外徑應(yīng)與減速器、電動機(jī)中心高相協(xié)調(diào)，避免與機(jī)座或其它零、部件發(fā)生碰撞。 2.2減速器內(nèi)部的傳動零件減速器外部傳動件設(shè)計(jì)完成后，可進(jìn)行減速器內(nèi)部傳動零件的設(shè)計(jì)計(jì)算。1） 齒輪材料的選擇應(yīng)與齒坯尺寸及齒坯的制造方法協(xié)調(diào)。如齒坯直徑較大需用鑄造毛坯時(shí)，應(yīng)選鑄剛或鑄鐵材料。各級大、小齒輪應(yīng)該可能減少材料品種。2） 蝸輪材料的選者與相對滑動速度有關(guān)。因此，設(shè)計(jì)時(shí)可按初估的滑速度選擇材料。在傳動尺寸確定后，校核起滑動速度是否在初估值的范圍內(nèi)，檢查所選材料

5、是否合適。3） 傳動件的尺寸和參數(shù)取值要正確、合理。齒輪和蝸輪的模數(shù)必須符合標(biāo)準(zhǔn)。圓柱齒輪和蝸桿傳動的中心距應(yīng)盡量圓整。對斜齒輪圓柱齒輪傳動還可通過改變螺旋角的大小來進(jìn)行調(diào)整。根據(jù)設(shè)計(jì)計(jì)算結(jié)果，將傳動零件的有關(guān)數(shù)據(jù)和尺寸整理列表，并畫出其結(jié)構(gòu)簡圖，以備在裝配圖設(shè)計(jì)和軸、軸承、鍵聯(lián)結(jié)等校核計(jì)算時(shí)應(yīng)用。聯(lián)軸器的選擇減速器的類型應(yīng)該根據(jù)工作要求選定。聯(lián)接電動機(jī)軸與減速器，由于軸的轉(zhuǎn)速高，一般應(yīng)選用具有緩沖、吸振作用的彈性聯(lián)軸器，例如彈性套柱銷聯(lián)軸器、彈性柱銷聯(lián)軸器。減速器低速軸（輸出軸）與工作機(jī)軸聯(lián)接用的連周期，由于軸的轉(zhuǎn)速較低，傳遞的轉(zhuǎn)距較大，又因?yàn)闇p速器軸與工作機(jī)軸之間往往有較大的軸線偏移，因此

6、常選用剛性可以移動聯(lián)軸器，例如滾子鏈聯(lián)軸器、齒式聯(lián)軸器。對于中、小型減速器，其輸出與工作機(jī)軸的軸線便宜不很大時(shí)，也可以選用彈性柱銷聯(lián)軸器這類彈性可移式聯(lián)軸器。聯(lián)軸器型號按計(jì)算轉(zhuǎn)距進(jìn)行選擇。所選定的聯(lián)軸器，起軸孔直徑的范圍應(yīng)與被聯(lián)接兩軸的直徑相適應(yīng)。應(yīng)注意減速器高速軸外伸段軸徑與電動機(jī)的軸徑不得相差很大，否則難以選擇合適的聯(lián)軸器。3 設(shè)計(jì)計(jì)算過程及說明3.1選擇電動機(jī)3.1.1電動機(jī)類型和結(jié)構(gòu)型式選擇Y系列籠型三相異步電動機(jī),臥式閉型電電動機(jī)。3.1.2選擇電動機(jī)容量工作機(jī)所需功率=7.98kw =80.7r/min電動機(jī)的輸出功率=10.4kw=*.* =0.82*0.98*0.95*0.98

7、*0.97*0.98*0.98*0.97*0.98*0.98*0.99*0.96=0.77確定電動機(jī)的額定功率Ped>=Pd3.1.3選擇電動機(jī)的轉(zhuǎn)速同步轉(zhuǎn)速 1500r/min。3.1.4確定電動機(jī)型號選擇 Y160M-4 額定功率 11kw 轉(zhuǎn)速 1460r/min3.2傳動裝置的總傳動比及其分配i=18.1 帶傳動 i=2 圓錐 i= 2.5 圓柱 i= 43.3計(jì)算傳動裝置的運(yùn)動和動力裝置參數(shù)各軸轉(zhuǎn)速: 電動機(jī)軸 =1460r/min 減速箱輸入軸 =486.7 r/min 高速軸 =235.1 r/min 低速軸 =58.8 r/min各軸輸入功率: =11kw =*0.95=

8、10.45kw=*0.98*0.97*0.98=9.73KW=*0.98*0.97*0.98=9.07KW各軸轉(zhuǎn)矩:T0=9550*/=72.0N*m T1=9550*/=205.0 N*m T2=9550*/=395.2 N*m T3=9550*/=1493.1 N*m3.4帶傳動設(shè)計(jì)3.4.1定v帶型號和帶輪直徑工作情況系數(shù) =1.1計(jì)算功率 =1.1*11=12.1kw選帶型號 A型小帶輪直徑 =100mm大帶輪直徑 =(1-0.01)*100*3=297mm大帶輪轉(zhuǎn)速 = =481.8r/min計(jì)算帶長求 = (+)/2 =198.5mm求 =(-)/2=98.5mm2(+)>=

9、a>=0.7*(+)初取中心距 a=600mm帶長 L=Dm+2*a+=1839.5基準(zhǔn)長度 =2000mm求中心距和包角中心距 a= + =344.18+337.06=681.24<700mm小輪包角 1=180°-(D2-D1)*60°=180°-(297-100)*60°/681.24 =162.6>120°數(shù)求帶根 v=3.14*/(60*1000)=7.64m/s傳動比 i=/=2帶根數(shù) =1.32kw =0.95 =1.03 P=0.17kw z=/(+)*)=12.1/(1.32+0.17)*0.95*1.03)

10、=8.3 取9根求軸上載荷張緊力 =500*/v*z(2.5-)/+qv*v=500*12.1/(7.64*9)*(2.5-0.95)/0.95+0.10*=149.3N軸上載荷 =2*sin(/2)=2*9*149.3*sin(162.6°/2)=2656.5N3.5齒輪傳動設(shè)計(jì)直齒錐齒: 軸交角=90° 傳遞功率P=10.45kw 小齒輪轉(zhuǎn)速=486.7r/m 傳動比i=2.07載荷平穩(wěn),直齒為刨齒,小齒輪40Cr,調(diào)質(zhì)處理,241HB286HB平均260HB,大齒輪用45號鋼,217HB255HB 平均230HB齒面接觸疲勞強(qiáng)度計(jì)算齒數(shù)和精度等級 取=24 =i*=4

11、8 選八級精度使用系數(shù)=1.0 動載荷系數(shù)=1.15齒間載荷分配系數(shù) 估計(jì)*Ft/b<100N/mm cos=u/=2/=0.89 cos=1/=1/=0.44=/ cos=24/0.89=26.97=/ cos=48/0.44=109.1v=(1.88-3.2(1/(2*)+1/(2*)cos=1.85=0.85=1.4齒向載荷分布函數(shù) =1.9載荷系數(shù) =1*1.5*1.4*1.9=3.99轉(zhuǎn)矩 =9.55*=9.55*10.45/486.7=20505N.mm彈性系數(shù) =189.8節(jié)點(diǎn)區(qū)域系數(shù) =2.5接觸疲勞強(qiáng)度 =710Mpa=680Mpa接觸最小安全系數(shù)=1.5接觸壽命系數(shù)

12、=1.0許用接觸應(yīng)力 = */=710*/1.05=676Mpa = */=680*/1.05=648Mpa小輪大端分度圓直徑 =0.3 =70mm驗(yàn)算圓周速度及Ka*Ft/b =(1-0.5R) =(1-0.5R)70=59.5mm =3.1459.5*486.7/60000=1.5m/s = b=*R=*d/(2*sin)=*/(2*=20.4mm*/b=1.0*689.2/20.4=33.8N/mm<100N/mm確定傳動尺寸大端模數(shù) m=/=70/24=2.9mm實(shí)際大端分度圓直徑d =m=3*24=84 =m=3*48=144b=*R=0.3*80.5=24.15mm齒根彎曲疲

13、勞強(qiáng)度計(jì)算齒面系數(shù) =2.72 =2.38應(yīng)力修正系數(shù) =1.66 =1.78重合度系數(shù) =0.25+0.75/ =0.25+0.75/0.85=0.66齒間載荷分配系數(shù) */b<100N/mm =1/=1/0.66=1.56載荷系數(shù) =1*1.15*1.56*1.9=3.4彎曲疲勞極限 =600MPa=570MPa彎曲最小安全系數(shù) =1.25彎曲壽命系數(shù) =1.0尺寸系數(shù) =1.0許用彎曲應(yīng)力 = lim/=600*1.0*1.0/1.25=480MPa =570*1.0*1.0/1.25=456MPa驗(yàn)算 =152<=152*2.38*1.78/(2.72*1.66)=142.

14、6MPa標(biāo)準(zhǔn)斜齒圓柱齒輪 小齒輪用40Cr調(diào)質(zhì)處理,硬度241HB286HB 平均260MPa 大齒輪用45號鋼,調(diào)質(zhì)處理,硬度229HB286HB 平均241MPa初步計(jì)算轉(zhuǎn)矩=9.55*9.73/235.1=39524N.mm齒數(shù)系數(shù)=1.0值 取=85初步計(jì)算的許用接觸應(yīng)力H1=0.96Hlim1=0.9*710=619MPa H2=0.9Hlim2=1.9*580=522MPa初步計(jì)算的小齒輪直徑 =Ad=85*=48.1mm取 d1=50mm初步尺寬b=d*=1*50=50mm校核計(jì)算圓周速度 v=0.62m/s精度等級 選九級精度齒數(shù)z和模數(shù)m 初步齒數(shù)=19; =i*19=4*1

15、9=76和螺旋角 =/=50/19=2.63158 =2.5mm =arcos=arccos2.5/2.63158=18.2°使用系數(shù) =1.10動載系數(shù) =1.5齒間載荷分配系數(shù) =2*39524/50=1581N=1.1*1.581/50=34N/mm<100N/mm=1.88-3.21/+1/cos=1.88-3.25*(1/19+1/76)cos18.2° =1.59=2.0=1.59+2.0=3.59= arctan=arctan=20.9°cos =cos18.2°20cos°/20.9cos°=0.95齒向載荷分布

16、系數(shù) =A+B1+0.6*+c*b/1000=1.36 =* * =1.10*1.05*1.76*1.36=2.76彈性系數(shù) =189.8節(jié)點(diǎn)區(qū)域系數(shù) =2.5重合度系數(shù) 取螺旋角系數(shù) =許用接觸應(yīng)力驗(yàn)算=189.8*2.38*0.97=647MPa<690MPa齒根彎曲疲勞強(qiáng)度驗(yàn)算齒行系數(shù)YFa = Y=2.72 Y=2.2應(yīng)力修正系數(shù) =1.56 =1.79重合度系數(shù) =1.61螺旋角系數(shù) 齒向載荷分配系數(shù) =1.76< 齒向載荷分布系數(shù) b/h=50.(2.25*2.5)=8.9 =1.27載荷系數(shù) K=*許用彎曲應(yīng)力 驗(yàn)算3.6軸的設(shè)計(jì)輸入軸選用45鋼調(diào)質(zhì) 取 d=35mm

17、計(jì)算齒輪受力 =84mm =(1-0.5 =689.2N=tan=計(jì)算支反力水平面反力 =1102.7N =-413.5N垂直面反力 =-1235.7N =4115.5N水平面受力圖垂直面受力圖水平面彎矩圖垂直彎矩圖合成彎矩圖轉(zhuǎn)矩圖許用應(yīng)力許用應(yīng)力值 應(yīng)力校正系數(shù) 當(dāng)量彎矩圖 軸徑 高速軸軸材料選用45鋼調(diào)質(zhì),取 d=40mm計(jì)算螺旋角 齒輪直徑 小輪 = 大輪小齒輪受力 轉(zhuǎn)矩=9.55*圓周力 =2*/=2*39524/50=1581N 徑向力畫小齒輪軸受力圖水平反力 =1358.1N =912.1N垂直反力 =594.7N =103.3N水平受力圖垂直受力圖水平彎矩圖垂直彎矩圖合成彎矩圖畫

18、轉(zhuǎn)矩圖應(yīng)力校正系數(shù) 畫當(dāng)量彎矩圖 =50220N.mm校核軸徑 =20.3<40mm低速軸 材料同前兩軸畫大齒輪受力圖計(jì)算支反力 水平反力 =1185.8 =395.2N 垂直反力 =21.2N =584.6N垂直受力圖水平彎矩圖垂直彎矩圖合成彎矩圖轉(zhuǎn)矩圖當(dāng)量彎矩校核軸徑 =26<60mm3.7軸承的選擇輸入軸軸承選擇:選用圓錐滾子軸承30208 e=0.37 Y=1.6 Cr=63000N=1177.7N=4297.0N=/(2*Y)=368N=/(2*Y)=1342.8N=1228.4N =1342.8N/=1.0>e /=0.3<e查表 =0.4 =1.6 =1

19、=0當(dāng)量動載荷 =*(*+*)=1.0*(0.4*1177.7+1.6*1228.4)=2436.5N=*(*+*)= 4297.0N軸承壽命 =同樣,高速軸承和低速軸承分別用選用圓錐滾子軸承30210和30213。3.8鍵的選擇 輸入軸 L=20 (mm)高速軸 L=20低速軸 L=30T=3.9減速機(jī)箱體的設(shè)計(jì) 名稱 符號 尺寸關(guān)系 結(jié)果 箱座壁厚 =0.025*a+38 箱蓋壁厚 =0.02*a+38 a=箱體凸緣厚度 , b=1.5=15;=1.5=15;=2.5=25加強(qiáng)肋厚度 , m=0.85=8.5; =0.85=8.5地腳螺栓直徑 14地腳螺栓數(shù)目 n 4軸承旁連接螺栓直徑 0

20、.75箱蓋,箱座連接螺栓直徑 ;螺栓間L軸承蓋螺釘直徑數(shù)目 ,n =8 n=4軸承蓋外徑 =s(兩連接螺栓間的距離)觀察孔螺釘直徑 軸承旁凸臺高度和直徑 h, h由結(jié)構(gòu)決定, =箱體外壁至軸承座端面距離 +3.10減速器附件設(shè)計(jì)3.10.1窺視孔和視孔蓋窺視孔應(yīng)該在箱蓋頂部,以便觀察,應(yīng)在凸臺上以便加工。3.10.2通氣器在箱蓋頂部,要適合環(huán)境,其尺寸要與減速器大小相合適。3.10.3油面指示器應(yīng)該設(shè)在油面比較穩(wěn)定的地方,如低速軸附近。用圓形油標(biāo),有標(biāo)尺的位置不能太高和太低,以免溢出油標(biāo)尺孔座。3.10.4放油孔和螺塞放在油的最低處,平時(shí)用螺塞塞住,放油孔不能低于油池面,以免排油不凈。3.10

21、.5起吊裝置吊環(huán)可按起重重量選擇,箱蓋安裝吊環(huán)螺釘處設(shè)置凸臺,以使吊環(huán)螺釘有足夠的深度。3.10.6定位銷用圓錐銷作定位銷,兩定位銷的距離越遠(yuǎn)越可靠,常設(shè)在箱體連接凸緣處的對角處,對稱布置。直徑d=0.8d2。3.10.7起蓋螺釘裝在箱蓋連接凸緣上,其螺紋長度大于箱體凸緣厚度,直徑可與連接螺釘相同。3.11密封與潤滑軸承采用接觸式密封。傳動采用浸油潤滑,盡量使各傳動浸油深度相同。軸承潤滑采用刮油潤滑。4 設(shè)計(jì)小結(jié)通過這次設(shè)計(jì)讓我了解到機(jī)械設(shè)計(jì)是從使用要求等出發(fā)，對機(jī)械的工作原理、結(jié)構(gòu)、運(yùn)動形式、力和能量的傳遞方式，以及各個零件的材料和形狀尺寸等問題進(jìn)行構(gòu)思、分析和決策的工作過程，這種過程的結(jié)果

22、要表達(dá)成設(shè)計(jì)圖紙、說明書及各種技術(shù)文件。通過帶式輸送機(jī)傳動裝置的設(shè)計(jì),了解了帶式輸送機(jī)傳動裝置的原理以及其結(jié)構(gòu)。從帶式輸送機(jī)傳動裝置的設(shè)計(jì)，我學(xué)到了機(jī)械設(shè)計(jì)的思想-以最少的成本達(dá)到最好的目的,以最簡單的結(jié)構(gòu)達(dá)到所需的功能。設(shè)計(jì)思想中最突出得的是-合理二字。整個設(shè)計(jì)過程使我受益非淺。5參考文獻(xiàn)1 王昆等主編,機(jī)械設(shè)計(jì)課程設(shè)計(jì),武漢: 高等教育出版社,1995。2 邱宣懷主編,機(jī)械設(shè)計(jì).第四版,北京:高等教育出版社,1997。3 濮良貴主編,機(jī)械設(shè)計(jì).第七版,西安: 高等教育出版社,2000。4 任金泉主編,機(jī)械設(shè)計(jì)課程設(shè)計(jì),西安:西安交通大學(xué)出版社,2002。5 許鎮(zhèn)寧主編,機(jī)械零件,北京:人民

23、教育出版社,1959。6 Tragfahigkeitsberechnung Von Stirn-und Kegelradern (DIN 3990), 1970。ag an employment tribunal clai Emloyment tribunals sort out disagreements between employers and employees. You may need to make a claim to an employment tribunal if: you don't agree with the disciplinary action your

24、 employer has taken against you your employer dismisses you and you think that you have been dismissed unfairly. For more informu, take advice from one of the organisations listed under Further help. Employment tribunals are less formal than some other courts, but it is still a legal process an

25、d you will need to give evidence under an oath or affirmation. Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the organisations listed under Further help. at

26、ion about dismissal and unfair dismissal, see Dismissal. You can make a claim to an employment tribunal, even if you haven't appealed against the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any compensation awarde

27、d 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 complaining about happened. If your application is received after this time limit, the tribunal will not usually a

28、ccept i. If you are worried about how the time limits apply to you If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your compensation if you win the case. This is known as a damages-based agreement. In England and

29、Wales, your solicitor can't charge you more than 35% of your compensation  if you win the case.you'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 t

30、hose that give advice by e-mail, 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 m Cay man Islands-based Webb, the head of Fifa's anti-racism taskforce, is in London for the Football Ass

31、ociation's 150th anniversary celebrations and will attend City's Premier League match at Chelsea on Sunday."I am going to be at the match tomorrow and I have asked to meet Ya ya Toure," he told BBC Sport."For me it's about how he felt and I would like to speak to him first

32、 to find out what his experience was."Uefa has opened disciplinary proceedings against CSKA for the "racist behaviour of their fans" during City's 2-1 win.Michel Platini, president of European football's governing body, has also ordered an immediate investigatio

33、n into the referee's actions.CSKA said they were "surprised and disappointed" by Toure's complaint. 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 pass

34、ing a lot of different life became the appearance of the same day; May be back in the past, to oneself the paranoid weird belief disillusionment, these days, my mind has been very messy, in my mind constantly. Always feel oneself should go to do something, or write something. Twenty years of life tr

35、ajectory deeply shallow, suddenly feel something, do it.一字開頭的年齡已經(jīng)到了尾聲。或許是愧疚于自己似乎把轉(zhuǎn)瞬即逝的很多個不同的日子過成了同一天的樣子；或許是追溯過去，對自己那些近乎偏執(zhí)的怪異信念的醒悟，這些天以來，思緒一直很凌亂，在腦海中不斷糾纏?？傆X得自己似乎應(yīng)該去做點(diǎn)什么，或者寫點(diǎn)什么。二十年的人生軌跡深深淺淺，突然就感覺到有些事情，非做不可了。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 chi

36、ldhood, 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; 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

37、in peace, suddenly found that isn't really grow up, it seems is not so important; Then in high school, think don't want to give vent to out your inner voice can be in the high school children of the feelings in a period, but was eventually infarction when graduation party in the throat, late

38、r again stood on the pitch he has sweat profusely, looked at his thrown a basketball hoops, suddenly found himself has already can't remember his appearance.童年時(shí)，覺得壓歲錢和新衣服是過年必備，但是隨著年齡的推進(jìn)，會越來越發(fā)現(xiàn)，那些東西根本就可有可無；初中時(shí)，以為要有一場暗戀才意味著真正的成長，但三年過去后，自己心平氣和的寫同學(xué)錄的時(shí)候，突然就發(fā)現(xiàn)是不是真正的成長了，好像并沒有那么重要了；然后到了高中，覺得非要吐露出自己的心聲才能

39、為高中生涯里的懵懂情愫劃上一個句點(diǎn)，但畢業(yè)晚會的時(shí)候最終還是被梗塞在了咽喉，后來再次站在他曾經(jīng)揮汗如雨的球場，看著他投過籃球的球框時(shí)，突然間發(fā)現(xiàn)自己已經(jīng)想不起他的容顏。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(shí)間。A person's time, your ideas are always special to clear.

40、 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 g

41、reen years oneself give oneself an arm injection, or is a self-righteous spiritual.一個人的時(shí)候，自己的想法總是特別地清晰。想要的，不想要的，界限明確，好像沒有什么可以撼動自己。也曾經(jīng)好像已經(jīng)下定了決心去做某件事，但更多的時(shí)候是最后又打起了退堂鼓。嫌惡過自己的怯懦，最終卻發(fā)現(xiàn)有很多緣分，有很多錯過，好像冥冥之中真的已經(jīng)注定。那些曾經(jīng)所謂的非做不可，只是青蔥年華里自己給自己注射的一支強(qiáng)心劑，或者說，是自以為是的精神寄托罷了。At the moment, the sky is dark, the air is fre

42、sh factor after just rained. Suddenly thought of blue plaid shirt; Those were broken into various shapes of stationery; From the corner at the beginning of deep friendship; Have declared the end of the encounter that haven't start planning. Those years, those days of do, finally, like youth, wil

43、l end in our life.此刻，天空是陰暗的，空氣里有著剛下過雨之后的清新因子。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。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 les

44、s 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 day-to-day weather lives. It will climb higher than the tip of Mount Everest (5.5 miles/8.85 kilometers), drift

45、ing even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. As he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence. We often close ourselves off when traumatic events happen in our lives; instead of lett

46、ing the world soften us, we let it drive us deeper into ourselves. We try to deflect the hurt and pain by pretending it doesnt exist, but although we can try this all we want, in the end, we cant hide from ourselves. We need to learn to open our hearts to the potentials of life and let the world sof

47、ten us.生活發(fā)生不幸時(shí)，我們常常會關(guān)上心門；世界不僅沒能慰藉我們，反倒使我們更加消沉。我們假裝一切仿佛都不曾發(fā)生，以此試圖忘卻傷痛，可就算隱藏得再好，最終也還是騙不了自己。既然如此，何不嘗試打開心門，擁抱生活中的各種可能，讓世界感化我們呢？Whenever we start to let our fears and seriousness get the best of us, we should take a step back and re-evaluate our behavior. The items listed below are six ways you can open

48、your heart more fully and completely.當(dāng)恐懼與焦慮來襲時(shí)，我們應(yīng)該退后一步，重新反思自己的言行。下面六個方法有助于你更完滿透徹地敞開心扉。Whenever a painful situation arises in your life, try to embrace it instead of running away or trying to mask the hurt. When the sadness strikes, take a deep breath and lean into it. When we run away from sadness

49、thats unfolding in our lives, it gets stronger and more real. We take an emotion thats fleeting and make it a solid event, instead of something that passes through us.當(dāng)生活中出現(xiàn)痛苦的事情時(shí)，別再逃跑或隱藏痛苦，試著擁抱它吧；當(dāng)悲傷來襲時(shí)，試著深呼吸，然后直面它。如果我們一味逃避生活中的悲傷，悲傷只會變得更強(qiáng)烈更真實(shí)悲傷原本只是稍縱即逝的情緒，我們卻固執(zhí)地耿耿于懷By utilizing our breath we soften

50、 our experiences. If we dam them up, our lives will stagnate, but when we keep them flowing, we allow more newness and greater experiences to blossom.深呼吸能減緩我們的感受。屏住呼吸，生活停滯；呼出呼吸，更多新奇與經(jīng)歷又將拉開序幕。2. Embrace the uncomfortable We all know what that twinge of anxiety feels like. We know how fear feels in ou

51、r bodies: the tension in our necks, the tightness in our stomachs, etc. We can practice leaning into these feelings of discomfort and let them show us where we need to go.我們都經(jīng)歷過焦灼的煎熬感，也都感受過恐懼造成的生理反應(yīng)：脖子僵硬、胃酸翻騰。其實(shí)，我們有能力面對這些痛苦的感受，從中領(lǐng)悟到出路。The initial impulse is to run away to try and suppress these feel

52、ings by not acknowledging them. When we do this, we close ourselves off to the parts of our lives that we need to experience most. The next time you have this feeling of being truly uncomfortable, do yourself a favor and lean into the feeling. Act in spite of the fear.我們的第一反應(yīng)總是逃避以為否認(rèn)不安情緒的存在就能萬事大吉，可這也恰好妨礙了我們經(jīng)歷最需要的生活體驗(yàn)。下次感到不安時(shí)，不管有多害怕，也請?jiān)囍赂颐鎸Π伞?. Ask your heart what it wants傾聽內(nèi)心Were often confused at the next step to take, making pros and