目次へ スクリューコンベヤ計算書[直結駆動] |
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●減速機の選定 |
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10 |
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1 |
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○スクリュー軸回転数 |
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0 |
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ns =Nm / Rm=1450/809 |
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1 |
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=1.79 [rpm] |
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TRUE |
check1 |
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DSCO無段変速+チェン+SWウオーム |
減速機 |
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Nm=モータ回転数 |
1450 |
[rpm] |
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DK037+チェン+SW200 |
型番 |
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Rm=減速機減速比 |
809 |
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1575 |
23 |
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住友重機械 |
メーカー |
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○減速機必要トルク |
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1.5 |
出力(kW) |
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T = 9545*P *Rm/Nm |
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85 |
軸径 |
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= 9545*0.38*809/1450 |
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6990 |
許容出力トルク |
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= 2023.7 [N-m] |
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21400 |
許容OHL(N) |
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P=必要動力 |
0.38 |
[kW] |
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○減速機出力トルク |
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Tm = 9545*P*Rm/(Nm*η) |
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= 9545*1.5*809/ (1450*0.81) |
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= 9861.9 [N-m] |
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Pm=モータ出力 |
1.5 |
[kW] |
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η=減速機効率 |
0.81 |
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○減速機設定トルクの決定(設定トルクは許容出力トルクの80%とする。) |
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80 |
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必要トルク < 設定トルク < 許容出力トルク < 出力トルク |
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2023.7 [N-m] < 5592
[N-m] < 6990 [N-m] < 9861.9[N-m] |
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よって5592 [N-m]とする。 |
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○減速機仕様 |
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名称 |
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ベベルバディボックス_6000シリーズ |
7 |
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型番 |
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ベベルバディボックス_1.5 |
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3 |
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出力 |
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1.5 |
[kW] |
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0 |
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許容出力トルク |
6990 |
[N-m] |
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許容OHL |
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21400 |
[N] |
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軸径 |
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85 |
[mm] |
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メーカ |
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住友重機械 |
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質量 |
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85 |
[kg] |
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●スクリュー軸 |
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○スクリュー軸推力 |
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Th=P*60/(Nj*V1)=0.38*60/(1*0.39)=58.5
[kN] |
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P=必要動力 |
0.38 |
[kW] |
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V1=輸送速度=S*ns |
0.39 |
[m/min] |
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S=スクリューピッチ |
0.22 |
[m] |
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ns=スクリュー回転数 |
1.79 |
[rpm] |
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Nj=スクリュー軸数 |
1 |
[本] |
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○推力による曲げモーメント(φ1=1のときM2=0) |
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M2=Th*0.7*D/2=58.5*0.7*40/
2=0 [kN-cm] |
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0 |
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D=スクリュー径 |
40 |
[cm] |
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Th=推力 |
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58.5 |
[kN] |
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○自重による曲げモーメント |
[軸水冷式] |
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M1=q*Cos(θ)*9.8*L1^2/(8000)=0.876*Cos(0)*9.8*500^2/(8000)=268.3
[kN-cm] |
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q=スクリュー軸質量 |
0.876 |
[kg/cm] |
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L1=スクリュー軸スパン |
500 |
[cm] |
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θ=傾斜角 |
0 |
[ °] |
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スクリュー軸外径 |
165 |
[mm] |
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スクリュー軸肉厚 |
11 |
[mm] |
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スクリュー板厚 |
8 |
[mm] |
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TRUE |
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○スクリュー軸トルク |
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Tr1 = 設定トルク/軸数 =
559.2/1=559.2 [kN-cm] |
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559.2 |
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P=計画必要動力 |
0.38 |
[kW] |
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ns=スクリュー軸回転数 |
1.79 |
[rpm] |
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○曲げモーメント
M=M1+M2=268.3+0=268.3 [kN-cm] |
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○相当ねじりモーメント,相当曲げモーメント |
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Te=(Tr1^2+M^2)^0.5=(559.2^2+268.3^2)^0.5=620
[kN-cm] |
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Me=(M+(Tr1^2+M^2)^0.5/2)=(268.3+559.2^2+268.3^2)^0.5/2)=444
[kN-cm] |
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Tr=スクリュー軸トルク |
559.2 |
[kN-cm] |
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M=曲げモーメント |
268.3 |
[kN-cm] |
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○許容ねじりモーメント,許容曲げモーメント |
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Ta=τ*(π*D1^3*(1-nr^4))/16 |
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=6*{3.14152*16.5^3*(1-0.867^4)}/16 |
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=2302 [kN-cm] > Te=620
[kN-cm] |
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Ma=σ*π*D1^3*(1-nr^4)/32 |
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=8*{3.14152*16.5^3*(1-0.867^4)}/32 |
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=1535 [kN-cm] > Me=444
[kN-cm] |
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τ=許容ねじり応力 |
6 |
[kN/cm2] |
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SUS304 |
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σ=許容曲げ応力 |
8 |
[kN/cm2] |
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nr=d2/D1 |
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0.867 |
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d2=中空軸内径 |
143 |
[mm] |
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D1=中空軸外径 |
165 |
[mm] |
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●駆動軸 |
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○トルクアーム反力によるモーメント |
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M3=Tr*L/C=559.2*0/0=0
[kN-cm] |
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C=トルクアーム長 |
0 |
[cm] |
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L=張出し距離 |
0 |
[cm] |
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○相当ねじりモーメント,相当曲げモーメント |
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Te=(Tr^2+M^2)^0.5=(559.2^2+0^2)^0.5=559.2
[kN-cm] |
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Me={M+(Tr^2+M^2)^0.5}/2={0+((559.2^2+0^2)^0.5}/2=0
[kN-cm] |
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Tr=駆動軸トルク |
559.2 |
[kN-cm] |
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M=駆動軸曲げモーメント |
0 |
[kN-cm] |
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○軸径 |
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相当ねじりモーメントより |
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d={16*Te/(π*τ)}^(1/3)={16*559.2/(π*6)}^(1/3)=7.801
[cm] |
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相当曲げモーメントより |
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d={32*Me/(π*σ)}^(1/3)={32*0/(π*8)}^(1/3)=0
[cm] |
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これを 10 [cm]とする。 |
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10 |
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τ=許容ねじり応力 |
6 |
[kN/cm2] |
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SS400 |
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σ=許容曲げ応力 |
8 |
[kN/cm2] |
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