L46A1 Mast Sectionthe pulley ratio device of tower crane work
The purpose of the tower crane pulley multiplying device is to double the lifting capacity of the lifting mechanism and reduce the lifting speed by one time, so that the lifting mechanism can meet the construction needs more flexibly. By changing the position of the movable pulley, the multiplying power of the hook pulley block can be changed to 2 or 4, and the outgoing state of the trolley and hook pulley is multiplied by 4.
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The transformation method is as follows:
(1) 4X to 2x
Place the hook on the ground and erect it on the ground. At this time, avoid friction between the steel wire rope and other parts. Loosen the wire rope slightly and pull out the ratio pin. Start the low-speed gear of the lifting mechanism and slowly lift the small pulley clamp until it reaches the bottom plate of the luffing trolley. Continue to start the lifting mechanism, i.e. form a working group of double rate hook.
(2) 2X to 4x
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Put the hook on the ground and stand on the ground. Continue to lower the steel wire rope, and the small pulley clamp plate will fall to the double pulley clamp plate under the self weight. Install the multiplying pin shaft, start the lifting mechanism to lift the hook, which forms the working group of multiplying hook.
