Electric wire rope hoist-----crane component
Note:
The standard lifting height is 6, 9, 12, 18, 24, 30 and 36 meters, and the max lifting height can reach 120 meters.
The lifting speed can be single-speed or double-speed or even multi-speed with frequency inverters.
The prefered rail for the low-headroom hoist is H-shaped rail, and I-shaped is also available. The recommended rope reeving of this kind of hoist is 2/1, 4/2 or 4/1.
The normal travelling speed is 20m/min, or 12.5, 16, 25, 32, 20/6.5 and 20/5 m/min by request.
The normal rail gauge of the double-girder hoist is 1200, 1400, 1600, 1800, 2000, 2500 and 3000 in meter.
The normal travelling speed is 20m/min, or 32, 40, 20/6.5 and 20/5 m/min by request.
Electric Hoists drawing:
| Load Spectrum |
| Duty Factor |
|
Average operating time per day |
|
| Light Duty |
K≤ 0.125 Hoist subject to very small loads and in exceptional cases only to rated loads |
≤ 2 |
2---4 |
4---8 |
8---16 |
|
|
|
| Medium Duty |
0.125≤ K≤ 0.25 Hoist usually subject to medium loads but rater often to rated loads. |
≤ 1 |
1---2 |
2---4 |
4---8 |
|
|
|
| Heavy Duty |
0.25≤ K≤ 0.5 Hoist usually subject to heavy loads but frequently to rated loads. |
≤ 0.5 |
0.5---1 |
1---2 |
2---4 |
|
|
|
| Very Heavy Duty |
0.5≤ K≤ 1 Hoist usually subject to rated loads or almost rated loads. |
≤ 0.25 |
0.25---0.5 |
0.5---1 |
1---2 |
|
|
|
| Working group |
ISO FEM |
M3 |
M4 |
M5 |
M6 |
| 1Bm |
1Am |
2m |
3m |
| Average operating time in hours per day |
|
| Tm=( 2× average hook travel(m)× cycles per hour× number of working hours per day) / [60× lifting speed(m/min)] |
|
|
|
| Practical Example for Selection of JL hoist |
|
| -Rated load 10.000Kgs |
| -Lifting height 8 meters |
| -Average hook travel Estimated 6 meters |
| -Lifting speed 6.3m/min |
| -Number of cycles per hour Estimated 12 cycles |
| -Number of working hours per day 8 hours |
| -Duty factor Medium |
| Tm=(2× 6× 12× 8)/(60× 6.3)=3.05hours |
| Consulting the load spectrum that the working group is M5 |
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