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个人收集整理仅供参考学习某闭式标准直齿圆柱齿轮传动。已知Pi=10.xyz(kW),单向运转,输入转速ni=955r/min,m=3mm,Zi=24,Bi=72mm,Z2=77,B2=68mm,Ze=189.8讦MPa,YFai=2.65,Ysai=1.58,YFa2=2.27,Ysa2=1.76,Kh=1.3,Kf=1.4,p=300MPa,cF2=270MPaJ的=660MPa,oh2=560MPa。MPaD试校核该传动的疲劳强度。2)若该传动改为频繁双向运转,计算中作哪些变动?(文字说明)3)若该传动改为开式传动、频繁双向运转,计算中作又哪些变动?(文字说明)4)上题中,去掉已知条件P=10.xyz(kW),其它条件不变且传动符合强度条件试求该传动所能传递的最大功率Pi?个人收集整理勿做商业用2KfTiYFaYsa 2. bdimKnFtU 1bdi u途附公式:ILFxyzx:班号yz:学号后2位解;1),弯曲强度的校核;1 /4个人收集整理仅供参考学习8910pini95.510510.224sK11.022410N*mm955z1ri2=niZ295.5105T2二9551051022477,28021OsN.mm一95524d一mzCFAAYFalYsa1bdim521,495.51o510.224:2.651.58二81.605MPa:/-fi=300MPa9556832432KfT2CF2YFa2YSa2bd2m21.495.510510.22477,2.271.76二77.866MPa十f2=270MPa95568377324接触疲劳强度的校核;Z277_243.208FVbH2 =2.5ZeKuFtU 1bd2U81.321.02241(/773.20812.5189.-68377377243.208=263.4(8MPa;问=560MPa=2.5189.2).改为双向频繁运转的话,接触疲劳强度与弯曲疲劳强度的校核都需要在许用81.321.02241Ct3.2081683243243.208=472.16MPa*=660MPa6/4强度上乘以07,以保证拥有足够的疲劳强度。个人收集整理勿做商业用途3)话,只需要校核弯曲疲劳强度其它的和第,开式齿轮传动的2小问的一样变动4).按弯曲强度计算;riiT595.510dmFixbdim95.51052KfYFaiYsai95530068324395.51021.42.651.58niZiTz95.5105Z2z彳卜rii汉Qf2xbd2m二37.586kw595.510Z22KfYFa2Ysa22495527068377395.51057721.42.271.76二35.451kw按接触疲劳强度计算niTi95.5105Xdiu5r95.51052“12xI2.5ZeJbdiuKhu195532495.51052DlZlT26602.5189.8AQQQ2kw3.208 1二 14.397kw95.5105Z2nixzid295.5105Z2F955324242683773208。H2Ibd2UIX12.5ZeKhU1,2c5goj2.A1i9,8J综上所述取pmax=min”p1.p2.p3.p4;=14.397kw95.5105772
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