目次へ スクリューコンベヤ計算書[チェン駆動] |
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●減速機の選定 |
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23 |
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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 * R0)=1450/
(319*2.5) |
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1 |
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=1.82 [rpm] |
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TRUE |
check1 |
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T付サイクロ減速機_6000シリーズ |
減速機 |
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Nm=モータ回転数 |
1450 |
[rpm] |
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CNHM05 |
型番 |
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R0=スプロケット歯数比 |
2.5 |
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319 |
減速比 |
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Rm=減速機減速比 |
319 |
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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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60 |
軸径 |
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= 9545*0.38*319/1450 |
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1760 |
許容出力トルク |
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= 797.96 [N-m] |
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22100 |
許容OHL(N) |
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η1=減速機効率 |
0.7 |
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η2=チェン効率 |
0.9 |
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P=必要計画動力 |
0.38 |
[kW] |
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○減速機出力トルク |
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Tm = 9545*Pm*Rm*η1/Nm |
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= 9545*1.5*319*0.7/1450 |
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= 2204.9 [N-m] |
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η1=減速機効率 |
0.7 |
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Pm=モータ出力 |
1.5 |
[kW] |
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0 |
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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<許容トルク<出力トルク |
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797.96 [N-m] < 1408
[N-m] < 1760 [N-m] < 2204.9[N-m] |
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よって1408 [N-m]とする。 |
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1408 |
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○減速機仕様 |
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名称 |
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T付サイクロ減速機_6000シリーズ |
5 |
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型番 |
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T付サイクロ_2 |
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3 |
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出力 |
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1.5 |
[kW] |
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許容出力トルク |
1760 |
[N-m] |
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許容OHL |
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22100 |
[N] |
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軸径 |
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60 |
[mm] |
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メーカー |
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住友重機械 |
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減速比 |
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319 |
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24 |
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●駆動チェン |
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○チェン速度 |
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V=p*z2*ns/1000=38.1*35*1.82/1000=2.43
[m/min] |
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p=チェンピッチ |
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38.1 |
[mm] |
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z2=大スプロケット歯数 |
35 |
[枚] |
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26 |
5 |
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ns=スクリュー軸回転数 |
1.82 |
[rpm] |
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○チェン負荷張力 |
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555.54 |
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F=Tms*R0*2/pcd_2=1.41*2.5*2/0.43=16.37
[kN] |
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Tms=設定トルク |
1.41 |
[kN-m] |
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pcd_2=大スプロケットDp |
0.43 |
[m] |
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○チェン強度 |
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BS=30.4 [kN] >
Ks*Kv*Kc*F=21.2 [kN] |
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BS=最大許容張力 |
30.4 |
[kN] |
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チェン番号 |
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RS120 |
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15 |
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F=チェン張力 |
16.37 |
[kN] |
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Ks=使用係数=1,Kv=速度係数=1.02,Kc=歯数係数=1.27 |
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●スクリュー軸 |
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TRUE |
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○スクリュー軸推力「1軸あたり] |
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Th=P*60/(Nj*V1)=0.38*60/(1*0.4)=57
[kN] |
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P=必要動力 |
0.38 |
[kW] |
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V1=輸送速度=S*ns |
0.4 |
[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 |
1.82 |
[rpm] |
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○推力による曲げモーメント(φ1=1のときM1=0) |
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M1=Th*0.7*D/2=57*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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57 |
[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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M2=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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○スクリュー軸トルク |
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Tr1=設定トルク*スプロケット比/軸数=140.8*2.5/1=352
[kN-cm] |
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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 |
1.82 |
[rpm] |
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○曲げモーメント
M=M1+M2=0+268.3=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=(352^2+268.3^2)^0.5=442.6
[kN-cm] |
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Me={M+(Tr^2+M^2)^0.5}/2={268.3+(352^2+268.3^2)^0.5}/2=355.4
[kN-cm] |
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Tr1=スクリュー軸トルク |
352 |
[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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=2301.8 [kN-cm] > Te=442.6
[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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=1534.6 [kN-cm] > Me=355.4
[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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○駆動チェン張力による曲げモーメント |
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M3=F*L=16.37*19.4=317.6
[kN-cm] |
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F=伝動チェン張力 |
16.37 |
[kN] |
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L=張出し距離 |
19.4 |
[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=(352^2+317.6^2)^0.5=474.1
[kN-cm] |
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Me={M+(Tr^2+M^2)^0.5}/2={317.6+(352^2+317.6^2)^0.5}/2=395.9
[kN-cm] |
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Tr=駆動軸トルク |
352 |
[kN-cm] |
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M=駆動軸曲げモーメント |
317.6 |
[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*474.1/(π*6)}^(1/3)=7.383
[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*395.9/(π*8)}^(1/3)=7.959
[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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S35C |
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σ=許容曲げ応力 |
8 |
[kN/cm2] |
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