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目次へ はすば歯車の計算(ルイスの式) |
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はすば歯車の計算(ルイスの式) |
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並歯 |
歯直角 |
ねじれ角 |
歯数 Z |
回転数
n |
歯幅 B |
材料 |
硬さHB |
転移係数x |
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圧力角 |
モジュールm |
β° |
rpm |
mm |
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1 |
小歯車 |
20° |
4 |
30 |
20 |
1500 |
32 |
SCM440_浸炭 |
Hv600 |
0.15 |
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SCM440 |
2 |
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2 |
大歯車 |
40 |
750 |
SCM440_浸炭 |
Hv600 |
-0.15 |
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SCM440 |
2 |
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●ピッチ円周上の周速 v (m/s) |
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v=π*D1*n1/(1000*60)=π*92.4*1500/(1000*60)=7.26
(m/s) |
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●速度係数 fv |
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●荷重係数 fw |
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fv=3.05/(3.05+v)=3.05/(3.05+7.26)=0.3 |
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fw=0.74 |
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0.74 |
0.74 |
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●小歯車:曲げ強さによる接線力 |
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●トルク T [N-m] |
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F=σb*B*m*y=92.6*32*4*0.61=7230
(N) |
T=F*D1/2000=7230*92.376/2000=333.939[N-m] |
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σb=fv*fw*σ0=0.3*0.74*417=92.6
(N/mm2) |
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σ0=許容曲げ応力=417 (N/mm2) |
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●スラスト Fx [N] |
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417 |
255 |
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y=歯形係数=0.61 |
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Fx=F*tan(β)=7230*tan(30)=4174.24[N] |
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Z=相当平歯車=30.8 |
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●大歯車:曲げ強さによる接線力 |
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●トルク T [N-m] |
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F=σb*B*m*y=92.6*32*4*0.715=8475
(N) |
T=F*D1/2000=8475*184.752/2000=782.887[N-m] |
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σb=fv*fw*σ0=0.3*0.74*417=92.6
(N/mm2) |
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417 |
107 |
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σ0=許容曲げ応力=417 (N/mm2) |
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●スラスト Fx [N] |
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y=歯形係数=0.715 |
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Fx=F*tan(β)=8475*tan(30)=4893.04[N] |
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Z=相当平歯車=61.6 |
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●面圧強さによる接線力 |
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●トルク T [N-m] |
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F=fv*k*D1*B*2*Z2/[(Z1+Z2)*(Cos
β)^2] |
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小歯車 |
T=F*D1/2000=5992*92.376/2000=276.758[N-m] |
3.8 |
0.382 |
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=0.3*3.8*92.4*32*2*40/[(20+40)*(Cos30)^2] |
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大歯車 |
T=F*D2/2000=5992*184.752/2000=553.517[N-m] |
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=5992 (N) |
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●スラスト Fx [N] |
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k=触面応力係数=3.8 |
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Fx=F*tan(β)=5992*tan(30)=3459.48[N] |
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●伝達動力 |
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P=F*v/1000=5992*7.26/1000=43.5
(kW) |
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