齿数Z
主动齿轮Z1从动齿轮Z2分度圆直径d
d1=m*z1d2=m*z2
模数m1139变位系数x齿顶高系数ha'2.50.751
0.6527.597.5
啮合角α’INV(α')=(2*(x1+x2)*TAN(α*PI()/180))/(Z1+Z2)+INV(α)INV(20°)=INV(α')=
查表14-1-24,插值法求α’前α'=2615
0.034997
α’=26°19'
0.014904
0.035286
后
1920
0.0352860.035352
26.32°
中心距变动系数y
y=(Z1+Z2)*(COS(α*PI()/180)/COS(α'*PI()/180)-1)/2y=1.209398968a'=((Z1+Z2)/2+y)*ma'=
实际中心距a'
65.52349742
齿顶高变动系数ΔyΔy=(x1+x2)-y
Δy=齿顶高ha
ha1=(ha'+x1-Δy)*mha2=(ha'+x2-Δy)*mhf1=(ha'+c'-x1)*mhf2=(ha'+c'-x2)*mda1=d1+2*ha1da2=d2+2*ha2df1=d1-2*df1df2=d2-2*df2
d1'=2*a'*z1/(z2+z1)d2'=2*a'*z2/(z2+z1)db1=d1*COS(α*PI()/180)db2=d2*COS(α*PI()/180)
0.190601032
3.93.651.251.535.3104.82594.528.83034102.216725.8415591.62003
齿根高hf
齿顶圆直径da
齿根圆直径df
节圆直径d'
基圆直径db
跨齿数k
k1=INT((Z1/PI())*(SQRT((1+2*x1/z1)^2-COSα*PI()/180)^2)/COS(2α*PI()/180)-2*xk2=INT((Z2/PI())*(SQRT((1+2*x2/z2)^2-COSα*PI()/180)^2)/COS(5α*PI()/180)-2*xW1=(W1'+ΔW1')*mW2=(W2'+ΔW2')*m查表14-1-32W1'=W2'=
12.73835.689
公法线长度W
4.582313.8308
ΔW1'=2*x1*SIN(α*PI()/180)ΔW2'=2*x2*SIN(α*PI()/180)0.513030.444626
顶隙系数c'压力角α
0.2520°
dms换算
0.32
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