The main hoisting steel wire rope of a crawler crane is the "lifeline" of the entire machine, specifically responsible for the vertical lifting of heavy objects, and has extremely high requirements for safety and reliability. It is typically made of high-strength alloy steel wire, and its structure often employs line contact or compacted strand designs to resist fatigue and wear. The rope core is selected based on the working conditions, using either a fiber core (lightweight) or a metal core (heavy-duty).
To cope with harsh environments, galvanizing is often performed to enhance corrosion resistance. When selecting a model, attention should be paid to anti-rotation capability (e.g., 35W×K7 structure), safety factor (≥5 for ordinary lifting, 6-8 for hazardous materials lifting), and ensuring that the ratio of pulley diameter to wire rope diameter is ≥20.
15×K7-IWRC
35(W)×7
35(W)×K7
The core function of the balance rope of a crawler crane is to connect the tail end of the counterweight boom to the tower, balancing the overturning moment generated by the boom and preventing the entire crane from tipping over. It is a type of counterweight cable, primarily bearing static tension, but it will experience dynamic fluctuations with changes in wind load and load. It often employs a double-wound or multi-wound structure, balancing strength and flexibility. The safety factor for the counterweight boom rope is generally taken as 3.
8×26WS-IWRC
8×K26WS-IWRC
8×K26WS-PWRC
The luffing steel wire rope of a crawler crane is a key component connecting the winch and the boom. The winch winds up and unwinds the steel wire rope, driving the boom to pitch and adjust the amplitude, thereby changing the working radius and lifting height. The luffing drum winds up and unwinds the wire rope, changing its direction via a pulley system, converting rotational motion into linear motion of the boom.
Ropes are required to have wear resistance, rotational resistance, and crush resistance, and is often galvanized to enhance corrosion resistance.
8×K26WS-IWRC
8×K26WS-PWRC