3.2查得自取[σF]=σFlim/SFmin=115/1.3(式13.24)σF=(2KA*T2)/(m*b2*d2)(式13.24)=2*1.1*305070/(3.75*33*200)I=πd14/64=π*504/64[σ]=0.004m=0.004*3075σ=Fτ2ρ(tan2at+tan2(r+ρv))[σH]=180MpaσH<180Mpa合格σFlim=115MpaSFmin=1.3[σF]=82MpaσF=26<82Mpa合格I=3.07*106mm4根据[3]查表13.5可得到:根据[3]查式13.13可得根据[3]查表13.6可得到根据[3]查式13.14可得到:根据[3]查表13.2可得到:根据[3]查式13.24可得蜗杆轴挠度验算转惯性距允许蜗杆挠度蜗杆轴挠度温度计算传动齿全效率搅油效率轴承效率总效率散热面积估算箱体工作温度1/3/(48EI)=(2*231678)/210*2103*(tan220°+tan2(16.7°+1.72°))1/3/48*346*3.07*106(此处取ρ≈D2)η1=tgr/tg(r+ρr)(式13.12)=tg16.7°/tg(16.7°tg16.7°+1.72°)自定自定η=η1η2η3=0.901*0.99*0.99A=9*10-5a1.88=9*101-5a1.88(式13.27)t1=(1000p1(1-η))/awA+t0(式13.26)=1000*4*(1-0.883)/15*0.788+20此处取aw=15w/(m2.c)中等通风环境[σ]=0.015mmσ=0.00125<[σ]合格η1=0.901η2=0.99η3=0.99η=0.883A=0.788m2t1=51°合格V40℃=320mm2/s到:根据[3]查式13.24可得到:根据[3]查式13.20可得到:根据[3]查式13.12可得到:
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