P=
式中:P 驅(qū)動(dòng)功率,kW;
Fa 起升力(或拉力),KN;
v 起升速度,m/min;
η 傳遞總效率(見表3)。
驅(qū)動(dòng)扭矩:
Mt=9550×
式中:Mt 驅(qū)動(dòng)扭矩,N.m
P 驅(qū)動(dòng)功率,Kw;
n 轉(zhuǎn)速,r/rpm
根據(jù)公式:驅(qū)動(dòng)功率P= =0.714
_步:查表5,蝸桿在500r/min,起升速度為0.5m/min,起升負(fù)荷為20KN時(shí),許用功率為0.72kW,在粗線范圍內(nèi),不選用,
第三步:查表6,蝸桿在500r/min,起升速度為0.583m/min,起升負(fù)荷為20KN時(shí),許用功率為0.9kW,滿足要求,應(yīng)選擇SWL5型升降機(jī)。
表4
型號(hào) |
起升力F KN |
普通速比 |
慢速比 |
||
起升速度V m/min |
蝸桿轉(zhuǎn)速n r/min |
起升速度Vm m/min |
蝸桿轉(zhuǎn)速nm r/min |
||
SWL2.5 QWL2.5 |
25 |
<0.05 |
<50 |
<0.0125 |
<50 |
20 |
0.3 |
300 |
0.15 |
600 |
|
15 |
0.5 |
500 |
0.1875 |
750 |
|
10 |
0.75 |
750 |
0.25 |
1000 |
|
5 |
1.5 |
1500 |
0.45 |
1800 |
|
2.5 |
1.8 |
1800 |
0.45 |
1800 |
|
SWL5 QWL5 |
50 |
<0.0583 |
<50 |
<0.0146 |
<50 |
40 |
0.35 |
300 |
0.175 |
600 |
|
30 |
0.35 |
300 |
0.219 |
750 |
|
20 |
0.7 |
600 |
0.292 |
1000 |
|
10 |
1.166 |
1000 |
0.525 |
1800 |
|
5 |
2.1 |
1800 |
0.525 |
1800 |
|
SWL10/15 QWL10/15 |
100 |
0.288 |
200 |
0.15 |
300 |
75 |
0.432 |
300 |
0.25 |
500 |
|
50 |
0.432 |
300 |
0.375 |
750 |
|
35 |
0.864 |
600 |
0.5 |
1000 |
|
20 |
1.44 |
1000 |
0.9 |
1800 |
|
10 |
2.592 |
1800 |
0.9 |
1800 |
|
5 |
2.592 |
1800 |
0.9 |
1800 |
|
SWL20 QWL20 |
200 |
0.15 |
100 |
0.1 |
200 |
160 |
0.15 |
100 |
0.15 |
300 |
|
120 |
0.3 |
200 |
0.15 |
300 |
|
100 |
0.3 |
200 |
0.25 |
500 |
|
75 |
0.45 |
300 |
0.375 |
750 |
|
50 |
0.75 |
500 |
0.5 |
1000 |
|
25 |
1.5 |
1000 |
0.9 |
1800 |
|
SWL25 QWL25 |
250 |
0.075 |
50 |
0.025 |
50 |
200 |
0.15 |
100 |
0.1 |
200 |
|
160 |
0.15 |
100 |
0.15 |
300 |
|
130 |
0.3 |
200 |
0.15 |
300 |
|
100 |
0.45 |
300 |
0.25 |
500 |
|
75 |
0.45 |
300 |
0.3 |
600 |
|
50 |
0.9 |
600 |
0.5 |
1000 |
|
SWL35
|
350 |
<0.075 |
<50 |
<0.025 |
<50 |
300 |
0.075 |
50 |
0.050 |
100 |
|
250 |
0.150 |
100 |
0.150 |
300 |
|
200 |
0.300 |
200 |
0.150 |
300 |
|
150 |
0.300 |
200 |
0.250 |
500 |
|
100 |
0.600 |
400 |
0.375 |
750 |
|
50 |
1.125 |
750 |
0.500 |
1000 |
|
SWL50
|
500 |
<0.08 |
<50 |
<0.03 |
<50 |
450 |
0.08 |
50 |
0.03 |
50 |
|
400 |
0.16 |
100 |
0.06 |
100 |
|
300 |
0.24 |
150 |
0.188 |
300 |
|
200 |
0.48 |
300 |
0.25 |
400 |
|
100 |
0.8 |
500 |
0.625 |
1000 |
|
SWL100
|
1000 |
<0.08 |
<50 |
<0.032 |
<50 |
900 |
0.08 |
50 |
0.032 |
50 |
|
800 |
0.159 |
100 |
0.064 |
100 |
|
600 |
0.238 |
150 |
0.096 |
150 |
|
400 |
0.317 |
200 |
0.192 |
300 |
|
200 |
0.635 |
400 |
0.639 |
1000 |
|
SWL120
|
1200 |
0.104 |
50 |
0.035 |
50 |
1000 |
0.208 |
100 |
0.069 |
100 |
|
900 |
0.417 |
200 |
0.139 |
200 |
|
800 |
0.625 |
300 |
0.277 |
400 |
|
600 |
1.042 |
500 |
0.347 |
500 |
|
400 |
1.563 |
750 |
0.521 |
750 |
|
200 |
2.083 |
1000 |
0.694 |
1000 |