1. The diameter of the crane pulley should match the diameter of the steel wire rope, ensuringD≥(e—1)d。
In the formula: D represents the nominal diameter of the pulley, d is the diameter of the wire rope, and e is the coefficient. For bridge cranes, e is generally taken as 20 to 30.
The lifting pulley turns smoothly without any defects.
3. The wheel guards and other devices that prevent wire ropes from jumping out of the groove are securely installed with no damage or obvious deformation.
4. Wheels should be scrapped if any of the following conditions are present:
Crack.
b. Uneven wear in the wheel groove3mm。
c. Wheel groove wall thickness has worn down to the original wall thickness20％。
d. Due to wear, the reduction in the bottom diameter of the wheel groove reaches the diameter of the steel wire rope.50％。
e. Other defects that damage wire ropes.
