L68B1 Mast Sectionthe lifting capacity of tower crane? Maximum lifting capacity
What is the lifting capacity of a tower crane? The lifting weight of tower crane is the weight that the hook can lift, including the weight of sling, sling and container. Lifting capacity includes two parameters: maximum lifting capacity and maximum range lifting capacity.
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The lifting capacity changes with the change of the amplitude, so each tower crane has its own corresponding table of lifting capacity and lifting amplitude, commonly known as the working curve table.
The maximum lifting capacity is determined by the design structure of the crane, mainly including its wire rope, hook, boom, lifting mechanism, etc. The lifting point must be in a small position. The maximum lifting capacity is not only related to the design structure of the crane, but also to its tipping moment, which is a very important parameter.
The lifting capacity of tower crane varies with the number of pulley blocks of hook. Generally, two ropes are twice the lifting capacity of single rope, four ropes are twice the lifting capacity of two ropes, etc. It can be changed as needed.
In order to prevent the tower crane from exceeding its maximum lifting capacity, all tower cranes are equipped with weight limiters, some of which are called force measuring rings, and many limit switches are installed in the weight limiters. In addition to the maximum rated weight of the limit tower crane, the weight limit can also be carried out during high-speed lifting and medium speed lifting. The lifting weight is the lightest at high speed, medium at medium speed and the heaviest at low speed.
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