L68B1 Mast Sectionthe lifting parts of the tower crane
(1) Wire rope
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In the tower crane lifting parts, the largest number, strict technical requirements and complex specifications are steel wire ropes. The wire rope is usually made up of a strand of fine steel wire with a diameter of 0.3-0.4mm and then twisted into a rope.
According to different functions, the steel wire ropes for tower crane are: hoisting steel wire rope, luffing steel wire rope, boom pulling rope, balance arm pulling rope, trolley traction rope, etc.
The characteristics of the steel wire rope are: the whole rope has high strength, the same cross-section, the same strength, light self weight, can bear the vibration load, has great elasticity, can be wound into a disk, can balance the movement at high speed, and has no noise. After wear, its outer skin will produce many burrs, which is easy to find and easy to handle in time.
(2) Luffing trolley
The luffing trolley of tower crane is an essential part of horizontal boom tower crane. The whole set of luffing trolley is composed of frame structure, steel wire rope, pulley, traveling wheel, guide wheel, steel wire rope supporting wheel, steel wire rope anti falling roller, trolley traction rope tensioner and rope breaking protector. For the extra long horizontal boom (more than 50m in length), a maintenance basket shall be hung on one side of the luffing trolley, which can carry maintenance personnel to each maintenance point for maintenance. After the operation, the trolley drives back to the root of the boom, uncoupling the cradle and the luffing trolley, and fixing it at the special support on the boom structure.
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Other components of tower crane include pulley, slewing ring, hook and brake, which are not detailed here.
