The electric hoist is a small lifting equipment with features of novel structure, high speed, low noise and easy use. Wire rope hoists are widely used in industries such as industrial and mining, railways, construction, shopping malls, workshops and docks. So operators need to understand how to properly use the electric hoist lifting pulley? The answer is as follows.
1. The diameter of the lifting pulley and the diameter of the wire rope should be matched to satisfy D ≥ (e - 1) d.
In the formula: D is the nominal diameter of the pulley, d is the diameter of the wire rope, e is the coefficient, and the bridge crane generally takes 20-30.
2, lifting pulley rotation is flexible, no defect.
3, to prevent the rope from jumping out of the wheel groove pulley guards and other devices installed firmly, no damage or significant deformation.
4. The pulley should be scrapped when one of the following conditions occurs:
a. Cracks.
b. uneven groove wear up to 3mm.
c. Wheel groove wall thickness wears up to 20% of the original wall thickness.
d. Decreases the diameter of the bottom of the groove due to wear
1. The diameter of the lifting pulley and the diameter of the wire rope should be matched to satisfy D ≥ (e - 1) d.
In the formula: D is the nominal diameter of the pulley, d is the diameter of the wire rope, e is the coefficient, and the bridge crane generally takes 20-30.
2, lifting pulley rotation is flexible, no defect.
3, to prevent the rope from jumping out of the wheel groove pulley guards and other devices installed firmly, no damage or significant deformation.
4. The pulley should be scrapped when one of the following conditions occurs:
a. Cracks.
b. uneven groove wear up to 3mm.
c. Wheel groove wall thickness wears up to 20% of the original wall thickness.
d. Decreases the diameter of the bottom of the groove due to wear
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