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目次へ 平歯車の計算(ルイスの式) |
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平歯車の計算(ルイスの式) |
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並歯 |
圧力角α0 |
モジュールm |
歯数 Z |
回転数
n |
歯幅 B |
材料 |
歯面硬度 |
転位係数x |
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rpm |
mm |
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1 |
小歯車 |
20 |
4 |
20 |
100 |
32 |
MC901_浸炭 |
500B |
0.15 |
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TRUE |
MC901 |
2 |
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2 |
大歯車 |
40 |
50 |
SCM415_高周波 |
500B |
-0.15 |
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TRUE |
SCM415 |
1 |
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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*80*100/(1000*60)=0.419
(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+0.419)=0.88 |
fw=0.74 |
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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=271.6*32*4*0.544=18912
(N) |
T=F*D1/2000=18912*80/2000=756.48[N-m] |
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σb=fv*fw*σ0=0.88*0.74*417=271.6
(N/mm2) |
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σ0=許容曲げ応力=417 (N/mm2) |
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D1=ピッチ円径=80[mm] |
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417 |
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y=歯形係数=0.544 |
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●大歯車:曲げ強さによる接線力 |
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F=σb*B*m*y=271.6*32*4*0.657=22840
(N) |
●トルク T [N-m] |
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σb=fv*fw*σ0=0.88*0.74*417=271.6
(N/mm2) |
T=F*D2/2000=22840*160/2000=1827.2[N-m] |
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σ0=許容曲げ応力=417 (N/mm2) |
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D2=ピッチ円径=160[mm] |
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417 |
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y=歯形係数=0.657 |
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●面圧強さによる接線力 |
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F=fv*k*D1*B*2*Z2/(Z1+Z2)=0.88*3.8*80*32*2*40/(20+40)=11414
(N) |
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k=触面応力係数=3.8 |
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●トルク T [N-m] |
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小歯車 |
T=F*D1/2000=11414*80/2000=456.56[N-m] |
3.8 |
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大歯車 |
T=F*D2/2000=11414*160/2000=913.12[N-m] |
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●伝達動力 |
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P=F*v/1000=11414*0.419/1000=4.782
(kW) |
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