v带传动二级圆柱直齿轮减速器说明书

全系数为S=1Р[σH1]= lim1 KHN1/S=0.92×600/1MPa=552MPaР[σH2]= lim2 KHN2/S=0.96×550 MPa=528 MPaР2)计算带入较小值得出d1t 64.668mmР3)圆周速度=1.62m/sР4)计算齿宽与齿高比b/h Р齿宽 b=φdd1t=64.668mmР模数mt=d1t/Z1=2.6945mmР齿高h=2.25mt=6.06mmР则齿宽与齿高之比为 b/h=10.67Р5) 计算载荷系数Р根据V=1.62m/s 7级精度由图10-8查的Kv=1.08Р直齿轮==1Р由表10-2查的KA=1.25Р由表10-4查得7级精度、小齿轮相对支承非对称布置时, =1.423由图10-13得=1.35Р故载荷系数K= KAKvKHαKHβ=1.25×1.08×1×1.423=1.921Р由(10-10a)得=73.722mmР计算模数m=d1/Z1=3.07mmР2、按齿根弯曲强度设计Р(1)计算公式内的各计算数值Р由图10-20c查的小齿轮弯曲疲劳强度极限РFE1=500 Mpa 大齿轮FE2=380 MpaР由图10-18取弯曲疲劳寿命系数KFN1=0.84 KFN2=0.88Р取弯曲疲劳安全系数S=1.4(1.25——1.5)Р[F]1=0.84×500/1.4=300 MpaР[F]2=0.88×380/1.4=238.86 MpaР计算载荷系数K= KAKvKFαKFβ=1.25×1.08×1×1.35=1.8225Р由表10-5查的齿形系数得РYFa1=2.65 YFa2=2.1752Р齿形校正系数РYSa1=1.58 YSa2=1.7948РYFa1 ×YSa1/[F]1=2.65×1.58/300=0.01396РYFa2 ×YSa2/[F]2=2.1752×1.7948/238.86=0.01634