減速器設(shè)計(jì)說(shuō)明書

1、遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書，、設(shè)計(jì)任務(wù)見(jiàn)任務(wù)書原件:、電動(dòng)機(jī)的選擇計(jì)算按工作要求條件選用三相異步交流電動(dòng)機(jī)，封閉式扇冷式結(jié)構(gòu),Y系列。1、選擇電動(dòng)機(jī)功率滾筒所需的有效功率:FV31000.65Pw2.015kw10001000Pw=2.015kw傳動(dòng)裝置的總效率:24,2刀刀0刀1刀查表17-9確定個(gè)部分效率如下：皮帶傳動(dòng)效率:0.95齒輪嚙合效率:0.97（齒輪精度為8級(jí)）滾動(dòng)軸承效率:0.99（球軸承）0.99聯(lián)軸器效率:滾筒效率:T40.96傳動(dòng)總效率：T0.950.970.9940.990.960.816Pw2.015T=0.0816Pr=2.469kw所需電動(dòng)機(jī)功率：pr=2

2、.469kwn0.816查設(shè)計(jì)資料表27-1,可選Y系列三相異步電動(dòng)機(jī)Y100L2-4型,額定功率P0=3kw;或選Y系列三相異步電動(dòng)機(jī)Y132S-6型，額定功r率P0=3kw;均滿足P°>P2、選取電動(dòng)機(jī)的轉(zhuǎn)速60v600.65滾筒軸轉(zhuǎn)速：nw41.4r/min兀D3.140.3現(xiàn)以同步轉(zhuǎn)速為1500r/min及1000r/min兩種方案進(jìn)行比較,由表27-1查得電動(dòng)機(jī)數(shù)據(jù)，計(jì)算總傳動(dòng)比列于表遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書電動(dòng)機(jī)數(shù)據(jù)及傳動(dòng)比方案號(hào)電機(jī)型號(hào)額定功率同步轉(zhuǎn)速滿載轉(zhuǎn)速總傳動(dòng)比Y100L23.01500142034.32Y132S63.O100096023.2比較

3、兩種方案，方案1的減速器傳動(dòng)比更適合，由表27-2查得O.電動(dòng)機(jī)卻號(hào)為Y100L24,其主要性能如下電動(dòng)機(jī)額定功率P。/kw3“電動(dòng)機(jī)釉伸長(zhǎng)度F/mm60電動(dòng)機(jī)滿載轉(zhuǎn)速n0/(r/min)1420電動(dòng)機(jī)軸伸直徑D/mm28電動(dòng)機(jī)中心高H/mm堵轉(zhuǎn)轉(zhuǎn)矩/額定轉(zhuǎn)矩T/N.100m2.2P0=3kwn0=1420r/min:、傳動(dòng)裝置的運(yùn)動(dòng)及動(dòng)力參數(shù)計(jì)算1、分配傳動(dòng)比總傳動(dòng)比：iEn01420nw41.434.3避免根據(jù)設(shè)計(jì)資料表17-9可知i則減速器的傳動(dòng)比：i減i帶二24取i帶2.834.312.25i電2.8一對(duì)減速器傳動(dòng)比進(jìn)行分配時(shí),為使兩級(jí)傳動(dòng)浸油深度相近，且ie=34.3i帶=2.8i減

4、=12.25i12=4.061i23=3.012中間軸大齒輪齒頂圓與低速軸不想碰,取雙級(jí)齒輪減速器高速級(jí)的傳動(dòng)比:i121.35i減=4.061則低速級(jí)的傳動(dòng)比:3.012i-J減12.25i124.0672、各軸功率、轉(zhuǎn)速和轉(zhuǎn)矩的計(jì)算遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書0軸：0軸即電動(dòng)機(jī)軸Po=Pr=2.469kwTno=1420r/minq二o9.55P9.552.469103NmT=n0142016.61I軸：I軸即減速器高速軸P1=PoT01=P0T0=2.469X0.95=2.346kw1n01420n=.i帶2.8r/min507P2.3461019.5519.5544.18NmT=

5、n1507n軸：n軸即減速器中間軸P2=P1T11Tl2=2.346X0.97X0.99=2.253kwn1507n2=i124.6r/min124.06729.55P29.552.253103NmT=n2124.6=172.66in軸：in軸即減速器的低速軸P3=P2T11Tl2=2.253X0.97X0.99=2.163kw3n2124.641.4r/minn=i233.0123P2.1631039.5539.55499.1NT=n341.4IV軸：IV軸即傳動(dòng)滾箝軸*二P4=P34243=2.163X0.99X0.99=2.12kwn4=n3=41.4r/min49.55P49.552.

6、12103.1NmT=n441.4489將上述計(jì)算結(jié)果匯總?cè)缦翽o=2.469kwno=1420r/minT0=16.61NmPi=2.346kwn1=507r/min=44.18NmP2=2.2538kwn2=124.6r/minT2=172.66NmP3=2.163kwn3=41.4r/minT3=499.1NmP4=2.12kwm=41.4r/minT4=489.1Nm遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書表二:各軸運(yùn)動(dòng)及動(dòng)力參數(shù)轉(zhuǎn)速功率轉(zhuǎn)矩T傳動(dòng)形式傳動(dòng)比效率/KW(r/min/Nm2.46oJ2.342.252.16IV2.12142016.61帶傳動(dòng)2.80.9550744.18172

7、.6124.66齒車齒輪傳動(dòng)4.06741.441.4499.1489.1聯(lián)軸器0.963.0120.961.00.98四、傳動(dòng)零件的設(shè)計(jì)計(jì)算1、帶傳動(dòng)的設(shè)計(jì)計(jì)算1)確定設(shè)計(jì)功率Pc2)選取V帶型號(hào)P=2.716kwc由教材書表44查得工作狀況系數(shù)Ka=1.1計(jì)算功率：Pc=KaP=1.1X2.469=2.716kw根據(jù)Pc和n0由圖4-12確定，因Pc、n0工作點(diǎn)處于A型區(qū)，故選A型V帶。3）確定帶輪基準(zhǔn)直徑dd1、dd2選擇小帶輪直徑dd1由表4-5和表4-6確定，由于占用空間限制不嚴(yán)格，取dd1>dmindd1=100mm對(duì)傳動(dòng)有利，按表4-6取標(biāo)準(zhǔn)值，取dd1=100mm。遼寧工

8、業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書驗(yàn)算帶速V-:兀ddin0兀10014201/v=7.4m/s601000601000在525m/s之間，故合乎要求。確定從動(dòng)輪基準(zhǔn)直徑dd2dd2=i帶dd1=2.8100=280mm查教材表4-6取dd2=280mm實(shí)際從動(dòng)輪轉(zhuǎn)速n2和實(shí)際傳動(dòng)比iV=7.4m/sdd2=280mmi帶=2.8不計(jì)&影響，若算得n2與預(yù)定轉(zhuǎn)速相差5%為允許。dd2i=dd12802.8n0n1=一i507-50710014202.8507r/min0%5%5074）確定中心距a和帶的基準(zhǔn)長(zhǎng)度Ld初定中心a0因沒(méi)有給定中心距，故按教材書式425確定按：0.7(dd1+dd2

9、)wa0W2(dd1+dd2)得：0.7X(100+280)Wa0<2X(100+280)266mmwa。w760mm取a0=500mm。確定帶的計(jì)算基準(zhǔn)長(zhǎng)度Lc：按教材式4-26:兀(dd2dd1Lc=2a0+(dd1+dd2)+24a0兀280=2X500+.(100+280)+一10024500=1613mm取標(biāo)準(zhǔn)Ld遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書查教材書表4-2取Ld=1600rnmo確定中心距aa=493.5mmLcLd16001613a=a0+'=500+=493.5mmLd=1600mm22a調(diào)整范圍：amax=a+0.03Ld=493.5+0.03X1600=

10、541.5mmamin=a-0.015Ld=493.5-0.015X1600=469.5mm5)驗(yàn)算包角a1按教材書式4-28得：(dd1,)(280100)a1-1800-aX60°=180°-493.5X60民1=15800=158>120符合要求6)確定帶根數(shù)Z按教材書式4-29:ZPCWZmaxPo序按教材書式4-19,單根V帶所能傳遞的功率p0=Ka(p0+p1+p2)按教材書式4-20得卷角系數(shù)Kaa1158Ka=1.25(15180)=1.25x(15180)=0.95由教材書表4-2查得：;-4C-3C-15C=3.78X10X=9.81X10V-Z=

11、9.6X10123C4=4.65X10-5Lo=1700mm3,n02142O=1481ad/s6060由教材書式4-18、4-21、4-22可知：P0=dd131C1-c2-C3(dd131)2-C41g(dd131)dd1遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書=100X148X3.78X10-4-9.81103-9.6X10-15(100148)2100-4.65X10-5X|g(100X148)可得:=1.24p1=C=4.654d12d13lg110C21(11)dc4d1sX10-5X100X148lg/.22=0.199.8110311110(1)4.651051002.8Ldp2=C

12、4dd1311gL0=4.65X10-5X100X148X1600lg=-0.002431700p0=Ka（p0+由教材書式4-29:7）確定初拉力F0：查教材書表按教材書式p1+p2)=0.95X(1.24+0.19-0.00243)=1.36V帶的根數(shù)：Z>Pc=2.716=1.99取Z=2根P01.364-1:q=0.1kg/m4-30:F0=500Pcvz2.5-1)+qvKa=500X=155N2.7167.4(2.50.951)0.17.428）計(jì)算軸壓力Q按教材書式4-31:Q=2F0Zsina0=2x155X2Xsin158=608.6N2P0=1.24P1=0.19P2

13、=-0.00243P。/=1.36Z=2F0=155NQ=608.6N9）確定帶輪結(jié)構(gòu)小帶輪dd（2.53）ds,采用實(shí)心結(jié)構(gòu)遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書大帶輪采用孔板式結(jié)構(gòu)d1=1.8d=1.8X26=46.8mm查設(shè)計(jì)資料表7-8得e=15,f=10,he=12,S=6,0=340,ba=11mm,hamin=2.75帶輪的寬度：B=(z-1)e+2f=(2-1)x15+2x10=35mm五、高速級(jí)斜齒圓柱齒輪的設(shè)計(jì)計(jì)算9N1=1X10N2=3.58*108原始數(shù)據(jù)：電動(dòng)機(jī)的輸出功率：2.345kW小齒輪轉(zhuǎn)速：507r/min傳動(dòng)比：4.067單向傳動(dòng)，工作載荷有輕微沖擊，每天工作8

14、小時(shí)，每年工作300天,預(yù)期工作10年1、選擇齒輪材料，確定精度等級(jí)及許用應(yīng)力小齒輪為45鋼，調(diào)質(zhì)處理，查教材書表5-1:齒面硬度為240HB大齒輪為45鋼，正火處理，查教材書表5-1:齒面硬度為200HB選齒輪精度等級(jí)為8級(jí)(GB10095-88)。查教材圖5-16(b):小齒輪齒面硬度為240HB時(shí)，t修而1580MPa大齒輪齒面硬度為200HB時(shí)，(Hiim2_550MPa計(jì)算應(yīng)力循環(huán)次數(shù)：由教材書式533得：二N1=60n1jLh=60X507X1X(10X8X300)=7.3X108N17.31088N2=i4.067=1.79X10查教材書圖5-17二得:.7n11.06,Zn21

15、.12由教材書式5-29得：Z/二Zx21.0二取Zw=1.0,SHmin=1.0,ZlvR0.92(精加工齒輪)由教材書式5-28確定疲勞詐用應(yīng)力：遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書Hlim1zZZZ580S=HminLVRN1x1W1.01.061.01.00.92=565.6MpaH1565.6MPa566.7MPatHHm2ZN2ZX2ZwZSHmin550LVR1.121.01.00.92=566.7MPa1.0因?yàn)镚1<H2,所以計(jì)算中取3=tH1=565.6MPa2、按接觸疲勞強(qiáng)度確定中心距a小齒輪轉(zhuǎn)矩：T1=44180NmmZh=2.44初選2KtZt1.2,暫取螺旋角,

16、9a0.3由教材書式5-42得：Zbea0.3由教材書表估取=20端面壓力角:基圓螺旋角:由教材書式a>(u+1)=4.0671圓整取:估算模數(shù):取標(biāo)準(zhǔn)值:小齒輪齒數(shù):cosBcos135-5得：Ze=189.8tan豉arctan(3barctan(tanMPaan)arctan(2cosbcost0.987tan20cos13)20.4829Bcos呦)12.20352.44sint2KT1ZhZeZZb32eau1.24412.44189.80.98720.34.067a=125mmn=(0.0070.02)mn=2mm2acosBZ1mn(u1)565.6=121.7mmZe18

17、9.8MPaZ=0.987Zh=2.44a=125mma=0.875mm2.5mm125cos13=24.03(4.0671)遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書Z2uZ1=4.067X24.03=97.7取Zi24,Z298T實(shí)際傳動(dòng)比:傳動(dòng)比誤差:修正螺旋角:i實(shí)Z2984.08Zi-24i理i=4.08-4.067i100%100%i理4.067=0.3%<5%在允許范圍內(nèi)mnZ1Z2=arccos2a=arccos29824。，.=1234412125與初選B=13°接近，Zh,Zb可不修正齒輪分度圓直徑：d=mnZ1=224=49.180mmcosBcos12.578d

18、2=mnZ2298=200.81mmcosBcos12.578圓周速度：V=兀d1n13=兀49.1823507=1.31m/s601060103、校核齒面接觸疲勞強(qiáng)度由教材書表5-3,電動(dòng)機(jī)驅(qū)動(dòng)，輕微沖擊，查得Ka=1.25_VZ11.3124按0.31,8級(jí)精度查教材書圖5-4(b)得100100動(dòng)載系數(shù)Kv=1.024齒寬b=0aa=0.3X125=37.5mm取b=40mmZ1=24Z2=98m=2d1=49.180mmd2=200.81mmV=1.31m/sb=40按b40=0.8，低速軸的剛性較大，二級(jí)傳動(dòng)中齒輪相對(duì)于d149.180軸承為非對(duì)稱布置查教材書圖5-7(a)得：仆=1

19、.0610遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書按8級(jí)精度查教材書表5-4得：Kq=1.2按教材書式5-4計(jì)算載荷系數(shù):K=KKvKAB計(jì)算重合度1.251.0241.061.21.628齒輪齒頂圓直徑:dal=d1+2hamn=49.180+2X1,0X2=53.462mm端面壓力角:為arctan(齒輪基圓直徑:端面齒頂壓力角:da2=d2+2hamn=200.81+2X1.0cosBdb1db2%t1淵2X2=204.810mm)arctan(tan20)=20.452cos12.578=d1cos貝=49.180Xcos20.4520=46.156mm=d2cos呦=200.18Xcos2

20、0.4520=188.475mm=arccos=arccosdb1=arccosda1db2.=arccosda246.1560=29.78253.180188475=23.2640204.810Z2(tan為t1-tan對(duì))+Z3(tan%t2-tan禺)124(tan29.7822tan20.452)+98(tan23.264tan20.452)=1.349bsinB=40sin12.5782兀=1.38K=1.25AKv=1.024K§=1.06Ka=1.2K=1.628da1=53.462mmda2=204.810mmdb1=46.156mmdb2=188.475mm制1=2

21、9.782淵2=23.264縱=1.349£=1.38由教材書式5-43計(jì)-Z1=0.861.349由教材書式5-42計(jì)算：ZbcosBcos12.578=0.99由教材書式5-41計(jì)算Zh基圓螺旋角:Bb=arctan(tanpces火力11&=ZhZeZ£Z2KTiu1bd，uZ£=0.86Zb0.99ZH=2.45遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書=arctan(tan12.578°xcos20.452:)=11.808°J1JV)2cos%2cos11.808ZH=cos%sin禺cos20.452sin20.452=2.45由

22、教材書式5-39計(jì)算齒面接觸應(yīng)力tHZv1Zv225.8105.4H=537.9MpaZv1=25.8Zv2=105.4YFa1=2.65YFa2=2.24Ysa1=1.58Ysa2=1.81tFiim1=230MPatFiim2=210MPa=2.45X189.8X0.86X0.992441801.6284.06714049.18024.067=537.9MPa<3=565.6MPa安全4、校核齒根彎曲疲勞強(qiáng)度Zi24cos3B二cos312.578Z29833cosBcos12.578取Zv1=25.8,Zv2=105.4查教材封窗5-14得：Y1a1=2.65,YFa2=2.24查

23、教材書圖5-15得：Ysa1=1.58,Ysa2=1.81由教材書式5-47計(jì)算Y,因e=1.38>1.0B丫6=1-£B=1-1.012.578=0.9120120由教材書式5-48計(jì)算Y-.Y=025+0.75cos2伊=025+0.75cos211.808.以1.349=0.79查教材書圖5-18b得：酗而1230MPa,岸|而2210MPa查教材書圖5-19得：Yn1Yn21.012遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書取:2.0,SFmin1.4由教材書式5-32,因?yàn)閙n=2<5,所以取Yx1=Yx2=1.0計(jì)算許用齒根彎曲應(yīng)力Flim1STYniYxi=2302

24、.01.01.0=328.6MpaSFminFlim2STSFmin1.4=2102.0Yn2Yx2=1.01.0=300Mpa1.4F1328.6MPaF2=300MPa由式5-44計(jì)算齒根彎曲應(yīng)力2KT1一丫YYFF1=mFa12d1nsa11.628441802.651.580.790.94049.2622=108.6MPa<(f1=328.6Mpa安全YFa2Ysa2華=tF1YYtF1=108.60MPatF2=105.29MPa*UFa1sa1.=108.62.241.812.651.58=105.2MPa<tF2=300MPa安全5、齒輪主要幾何參數(shù)Z124,Z298

25、,u=4.067,mn=2mmB=12°3441da2=204.81mm=43.180mm=195.81mmd1=49.180mmd=d-2(haf11df2=d2-2(haa=25mmd2=200.81mm,c)mn=49.180-2c)mn=200.81-2齒寬：b1=45mm,da1=53.180mm,XX(21.0+0.25XX(21.0+0.25b2=40mm13遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書六、低速級(jí)斜齒圓柱齒輪的設(shè)計(jì)計(jì)算傳動(dòng)比已知：傳動(dòng)功率P2=2.252kw,小齒輪轉(zhuǎn)速n2=124.6r/min,i=u=3.0121、選擇齒輪材料，確定精度等級(jí)及許用應(yīng)力小齒輪為4

26、5鋼，調(diào)質(zhì)處理，查教材書表5-1:齒而硬度為240HB大齒輪為45鋼，正火處理，查教材書表5-1:齒而硬度為200HB選齒輪精度等級(jí)為8級(jí)(GB10095-88)查教材書圖5-16(b):小齒輪齒面硬度為240HB時(shí),Hlim1580MPaHiim2550MPa大齒輪齒面硬度為（對(duì)于工業(yè)用齒輪，通常按MQ線取值）計(jì)算應(yīng)力循環(huán)次數(shù):由式533得:N1=60n2jLh=60X124.6X1X(10X8X300)=2.24X108N=2.24X110N12.24108N2=7.45i3.0127X102N=7.457X10查教材書圖5-17得：ZN11.12,Zn21.19由教材書式5-29得：Z/

27、Zx21.0取Zw=1.0=5801.121.01.01.00.92=597.6MPaHlim2Zzzz2SN2x2WLVRHmin=5501.191.01.01.00.92=602.14MPa8h1=597.6MPa8h2=602.14MPa,SHmin=1.0,ZLVR0.92(精加工齒輪)由式5-28確定疲勞許用應(yīng)力:Hlim1ZZZZ1SN1x1WLVRHmin因?yàn)镠1L<=h1=597.6MPaa14一2，一K乙t1.20a0.35Z=0.987pZE=189.8MPaZh=2.44a=155mmmn=2.5遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書2、按接觸疲勞強(qiáng)度確定中心距a-.r

28、.1Bh小齒輪轉(zhuǎn)矩：Ti=172660Nmm初選K乙21.2,暫取螺旋網(wǎng)/B13-、,0'-tta0.35由教材書式5-42得：Zbcoscos130.987由教材書表5-5得：ZE=189.8MPa由教材書式5-41計(jì)算Zh估取n=20：如kb上"一,tan«n，tan20?一場(chǎng)面壓力角：atarctan()arctan()20.4829cosBcos13基圓螺旋角：Bbarctan(tan(3cos民t廣arctan(tan13cos20.4829)一12.2035:2cosBbj2cos12.2035:Zh=、cos民sin民=,cos20.4829二,sin

29、20.4829=2.44由式5-39計(jì)算中心距a：2a>(u+1)3.ZhR,24uTt11;31.01726602.44189.80.9872=3.012120.353.012597.6=154.38mm,"冕')圓整?。篴=155mm估算模數(shù)：mn=(0.0070.02)a=1.085mm3.1mm取標(biāo)準(zhǔn)值：mn=2.5mm小齒輪齒數(shù):Z2acosB2155cos131mn(u1)=25(3.0121)=30.1Z2uZ1=30.1X3.012=90.6Z1=30Z2=91取Z130,Z291實(shí)際傳動(dòng)比：i實(shí)Z2913.03Z13015遼寧工業(yè)大宇機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)

30、明書i理i實(shí)3.012-3.03100%0.7%<5%傳動(dòng)比誤差：i100%i理3.012在允許范圍內(nèi)修正螺旋角：mnZ1Z2B=arccos=arccos2a與初選B=13°接近，Zh,Z2530+91=12037'442155可不修正。PS1237'44"齒輪分度圓直徑:mZ2530d=n1=.=76.86mmcosBcos12.628mZ25(n2.91d2=cosBcos12.628=233.14mm圓周速度:兀dn1兀.76.86124.6V=3=3=0.50m/s601060103、校核齒面接觸疲勞強(qiáng)度由表5-3,電動(dòng)機(jī)驅(qū)動(dòng)，輕微沖擊，查得

31、Ka=1.25VZ10.5030按0.151001008級(jí)精度查教材書圖5-4(b)得動(dòng)載系數(shù)Kv=1.025d1=76.86mmd=233.14mm2v=0.50m/sKa=1.25Kv=1.025b=54.25mm齒寬b=0aa=0.35X155=54.25mm取b=55K3=1.03K=1.6362按b55=0.7,低速軸的剛性較大，二級(jí)傳動(dòng)中齒輪相對(duì)于K31.2d176.86承為稱布置杳教材書圖5-7(a)得：上=1.03按8級(jí)精度查表5-4得：Ka=1.2按式5-4計(jì)算載荷系數(shù)：K=KaKvKbKa=1.25X1.025X1.03X1.2=1.58計(jì)算重合度a,£da1=8

32、1.86mmda2=238.14mm16齒輪齒頂圓直徑:遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書dal=d1+2hamn=76.86+2X1.0X2.5=81.86mmda2=d2+2hamn=233.14+2X1.0X2.5=238.14mm端面壓力角:o(tarctan(tann)arctan(tan20)=20.460cosBcos12.628at=20.460db1=72.00mmdb2=218.43mm齒輪基圓直徑:at1=28.410端面齒頂壓力角:%t1=arccos淵2=arccosZ2(tanm由教材書式由教材書式由教材書式基圓螺旋角:bsindb1da1db2da2oct-tan

33、B54.25sin12.63=25兀5-435-425-41計(jì)算:計(jì)算:計(jì)算ZZ£zbcosBb=arctan(tan=arccos72.00=28.41081.86=arccos218'3=23.48。233.14)+Z3(tan循t2=1.2951=0.7691.69-tan=1.69=arctan(tan12.628=0.988at2=23.480a=1.693=1.295Ze=0.769Zb=0.988cos12.628Xcos20.46Bb=11.86Zh=2.44db1=d1cos加=76.86Xcos20.460=72.000mmdb2=d2cos供=233.1

34、4Xcos20.460=218.43mm=11.8602cos11.86=2.442cos%Zh=cos貝sin貝cos20.46sin20.46由教材書式5-39計(jì)算齒面接觸應(yīng)力1tH=ZhZeZ£Zp17遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書21726601.583.0121=2.44X189.8X0.769X0.988X55276.8623.012(TH=574.4MPa=574.4MPa<3=597.6MPa安全4、校核齒根彎曲疲勞強(qiáng)度二Z1Z1v1cos3Zv2Z23cosBcos30cos312.62891312.62832.397.94Zvi=32.3Zv2=97.9

35、4取Zvi=32,Zv2=98,查教材書圖5-14得：YFa1=2.56,YFa2=2.27由教材書式5-47由教材書式5-48查教材書圖5-15得：Ysa1=1.63,£=1.295>1.012.628Ysa2=1.82Y3=0.86=1-M20=1-1.0計(jì)算Y120=0.86Y=0.677Y=0.25+2-0.75cos(3b20.75cos=0.25+11.86=0.6771.677與高速級(jí)齒輪相同tF1=328.6MPa,F2=300MPa由教材書式5-44計(jì)算齒根彎2KT1位1=YFa1Ysa1YYbd1mn21.581726602.561.630.6770.865

36、576.862=149MPa<上1=32：8.6Mpa安全F2=F1Fa1YFa2Ysa2=147.8672.26Ysa12.54=144.402MPa<42=300MPa181.801.64安全tF1=328.6MPatF2=300MPatF1=149MPatF2=144.402MPa遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書5、齒輪主要幾何參數(shù)Z130,Z291,u=3.012,mn=2.5mmB=12037'44d1=76.86mm*.d2=233.14mm,da1=81.86mm,da2=238.14mmdf1=d1-2(ha+c)mn=76.86-2X2.5X(1.0+0

37、,25)=70.61mmdf2=d2-2(hac)mn乂X()=233.14-22.51.0+0.25=226.89mma=155mm齒寬：b1=55mm,b2=50mm七、軸的設(shè)計(jì)計(jì)算1、減速器軸的設(shè)計(jì)計(jì)算1)選擇軸的材料：軸的材料為45號(hào)鋼，調(diào)質(zhì)處理2)按扭矩初步估算軸端直徑初步確定高速軸外伸段直徑，高速軸外伸段上安裝帶輪，其軸徑可按下式求得：按設(shè)計(jì)資料式8-2得：dA03f查教材書表8-2得：A0=130,n估算高速軸外伸端最小直徑：dA3P113032.34623.32mmmin0n1507圓整?。篸126mm該段軸長(zhǎng)：l=(Z-1)e+2f=(2-1)x15+2x10=35mm估算低

38、速軸外伸端最小直徑：3P2.216d3A03120345.1mmn341.4圓整取：d348mm估算中間軸安軸承處最小直徑：d236mm2、高速軸強(qiáng)度計(jì)篥已知：雙級(jí)斜齒輪圓柱減速器高速軸傳遞的轉(zhuǎn)矩為=44.18Nm,19遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書帶輪上的壓軸力Q=609N,齒輪的分度圓直徑di=54,18mm,齒根圓宜徑df=49.180mm,螺旋角B=12.5780,at=20.4521）設(shè)計(jì)軸的結(jié)構(gòu)a、兩軸承之間的跨距l(xiāng)2112mm。b、布置軸上零件，設(shè)計(jì)軸的結(jié)構(gòu)。根據(jù)安裝和定位的需要，初定各軸段直徑和長(zhǎng)度，各跨度尺寸,2）按彎矩合成強(qiáng)度條件校核軸a、畫出空間力系圖，如圖a所示。分

39、別求支反力并畫彎b、將空間力系分解為H和V兩個(gè)平面力系,矩圖如圖b-e所示。計(jì)算齒輪所受的各個(gè)分力，繪制空間受力簡(jiǎn)圖圓周力:2T1=1794Nd1軸向力:FtanB400NtFt=1794NFr=669N徑向力:FrFtant於669NFa=400NR1H248Q25.7Fa54F16624860925740054669787NR2H166Rh=787N82Q25.7Fa112FrR2H=847N1668260925.7400112669847N16620遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書c、求軸的彎矩M,畫彎矩圖，如圖f所示74400NmmM22VM220M22HOMca026508NmmM

40、ca產(chǎn)61432NmmM1H82Q8260949938NmmM一、.口“2H54R2H5484745738Nmm35458Nmm2M2H0M2HR54Ft5417491v166166584N1210N166166R2v112Ft1121794Mi"1H49938NmmM2=WlM22HM22V79813Nmme、求計(jì)算彎矩Mca,畫計(jì)算彎矩圖hM1H49938NmmM2h45738NmmM2H035458NmmRiv584NR2V2689.9NM2V65408NmmM279813NmmMca2078981NmmM2v112Riv11258465408Nmmd、畫軸的扭矩圖，T=441

41、80Nmm,如圖g所示。取根據(jù)：McaM00.6Nmm44180M120.6T226508744004418078981121M2074400NmmMca284100NmmM2(aT)2,a0.62caoMca12Nmm44180499382M0.6Tca2M226143220.62Nmm79813441802Mca20M2O20.6T28410020.6Nmm20.6遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書TFtQFrFaaFrR2HQFaR1HbM2H0M2HM1HcR1vFtR2vdM2M20M1eTf22Mca2ca20遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書Mca0圖g圖hf、確定危險(xiǎn)剖面，校核

42、強(qiáng)度根據(jù)圖中軸的結(jié)構(gòu)尺寸，選擇彎矩最大的I剖面和彎矩較大,軸頸較細(xì)的n剖面進(jìn)行驗(yàn)算根據(jù)主教材表8-3查得：45號(hào)鋼，tb-i=55MPa45鋼調(diào)質(zhì)的機(jī)械性能參數(shù):J268MPa,III剖面疲勞強(qiáng)度安全系數(shù)校核a、因軸單向轉(zhuǎn)動(dòng)，彎曲應(yīng)力為對(duì)稱循環(huán)變應(yīng)力。扭剪應(yīng)力按脈動(dòng)23分別選擇田、IV剖面進(jìn)行驗(yàn)算：田剖面所受的彎矩和扭矩大,國(guó)637MPa,合，鍵槽和軸肩圓角三個(gè)應(yīng)力集中源。循環(huán)處理。軸肩圓角處有應(yīng)力集中。IV剖面除受彎矩和扭矩外，附近還有過(guò)盈配14.3MP4tb1=55MPa合0.135格n1155MPa。n剖面的計(jì)算應(yīng)力0.Mca16143214.3MPacaI剖面的計(jì)算應(yīng)力：整284100

43、3&W0.143.180工10.44MPa<tb-1=55MPa合格e10.44MPacatcaW3）按疲勞強(qiáng)度安全系數(shù)松核軸.遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書81000maxW0.149.18036.8MPa(J=一max6.8MPaminmax6.8MPamin6.8MPa6.8MPa44180nmaxWTE=0.249.180Ymax1.85mmna1.85MPa0.975MPa,ymin0max0.975MPa根據(jù)教材附表查取應(yīng)力集中系數(shù),量系數(shù)。絕對(duì)尺寸影響系數(shù)和表面質(zhì)min根據(jù):Dd54.18049.4801.5r1.5d49.1800.030查得:1.88,K刀1

44、.57,0.84,£刀0.78,B0.95取小小0.21則:SL2681.88=16.720.840.956.800.975MPaa=16.72=68.269Yl=K刀£BY1.570.780.95155=68.260.9750.210.97516.23取S=1.51.8ES,共III剖面疲勞強(qiáng)度滿足要求。b、IV剖面疲勞強(qiáng)度安全系數(shù)校核因軸單向轉(zhuǎn)動(dòng)，彎曲應(yīng)力為對(duì)稱循環(huán)變應(yīng)力。扭剪應(yīng)力按脈動(dòng)循環(huán)處理。M2650815.08MPamaxW0.1263max15.08MPa24遼寧工業(yè)大學(xué)機(jī)械設(shè)計(jì)課程設(shè)計(jì)說(shuō)明書max15.08MPa量系數(shù)。刀maxWT441800.2263刀m

45、ax12.5612.56MPa6.28MPa,nmin0min15.08MPaa15.08MPa根據(jù)教材附表查取應(yīng)力集中系數(shù),絕對(duì)尺寸影響系數(shù)和表面質(zhì)max12.56MPa查得:1.76,K刀1.54,0.91,£刀0.89,B0.95ma12.56MPa取小刀0.21min0取S=1.5S產(chǎn)一KTm1551.542681.760.910.9512.560=12.14=10.48=10.486.280.216.280.890.95=12.14S0S；10.4812.1410.48212.1421.8S>S,=7.98求，所以IV剖面疲勞強(qiáng)度滿足要7.98max15.08MPa,八、滾動(dòng)軸承的選擇和壽命驗(yàn)算1、滾動(dòng)軸承的選擇減速器中的軸承承受較小的徑向載荷，可采用深溝球軸承。高速軸上按課程設(shè)計(jì)教材表21-1標(biāo)準(zhǔn)可得軸直徑35mm,選取軸承代號(hào)6207。中間軸端在直徑40mm,可得軸承代號(hào)6208