圆锥圆柱齿轮减速器说明书(8)
发布时间:2021-06-08
发布时间:2021-06-08
圆锥圆柱齿轮减速器说明书,大学课程设计论文
m=d1/Z1=2.257, 取m=2.5; d1=mZ1=2.5×28=70;
dm1=d1(1-0.5φR)=70×(1-0.5×0.3)=59.5
Vm=(πdm1n1)/(60×1000)=(π×59.5×568)/(60×1000)=1.77m/s 查表得:
KA=1.25 (VmZ1)/100 =(1.77×28)/100=0.4956 查图得:Kv=1.06
m2
R Z12 Z2 110.68 mm
2
b= RφR =0.3×110.68=33.20 取b=34 φdm=b/dm1 =0.571 查得 Kβ= 1.26
K=KAKVKβ=1.25×1.06×1.27=1.67
ZHZE
H
2KT1
2bdm1
u2 1
=523.5< δH 1=543MPa u
故安全;
2)极核齿根弯曲疲劳强度
δ1 =arctan(Z1/Z2)=arctan(28/84)=18.4350 δ2=Σ-δ1=900-18.4350 =71.5650 Zv1=Z1/cosδ1 =28/cos18.4350 =29.5146 Zv2= Z2/cosδ2 = 84/cos71.5650 =265.63 查表得:
YFa1=2.62 YFa2=2.22 Ysa1= 1.63 Ysa2=1.87 查图得: ζ
Flim1
=220MPa ζ
Flim2
=210MPa
查图 5-19得: YN1=1.0 YN2=1.0 查图得:
Yx =1.0
YST = 2.0 SFmin =1.4 [ζF]1=(ζ[ζF]2=(ζ
Flim1
·YST·YN1·Yx)/SFmin =220x2.0/1.4×1×1 ·YST·YN2·Yx)/SFmin
=314MPa
Flim2
=300MPa
下一篇:企业对文秘人员素质的要求 2