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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 |
MC901_ナイロン |
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0.15 |
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MC901 |
4 |
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2 |
大歯車 |
40 |
750 |
SUS304_ステンレス |
Hv200 |
-0.15 |
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SUS304 |
6 |
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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=0.75/(1+v)+0.25=0.75/(1+7.26)+0.25=0.341 |
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=1.8*32*4*0.61=141
(N) |
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T=F*D1/2000=141*92.376/2000=6.513[N-m] |
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σb=fv*fw*σ0=0.341*0.74*7=1.8
(N/mm2) |
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σ0=許容曲げ応力=7 (N/mm2) |
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●スラスト Fx [N] |
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7 |
255 |
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y=歯形係数=0.61 |
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Fx=F*tan(β)=141*tan(30)=81.41[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=17.7*32*4*0.715=1620
(N) |
T=F*D1/2000=1620*184.752/2000=149.649[N-m] |
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σb=fv*fw*σ0=0.341*0.74*70=17.7
(N/mm2) |
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70 |
107 |
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σ0=許容曲げ応力=70 (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)=1620*tan(30)=935.31[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=1000000*92.376/2000=46188[N-m] |
3.8 |
0.382 |
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=0.341*3.8*92.4*32*2*40/[(20+40)*(Cos30)^2] |
大歯車 |
T=F*D2/2000=1000000*184.752/2000=92376[N-m] |
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=1000000 (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)=1000000*tan(30)=577350.27[N] |
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●伝達動力 |
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P=F*v/1000=141*7.26/1000=1.02
(kW) |
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