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Electric bridge crane major parts requirements

Dec 30, 2019
Electric bridge crane major parts should meet the following safety requirements:
* The increase of the opening is less than 15% of the original size, and the torsional deformation is less than 10%;
 
* Plate hook bushing wear is less than 50% of original size, plate hook mandrel wear is less than 5%, no peeling, burr, welding repair;
 
* There are no obvious defects in the hook hanger and pulley;
 
* The amount of wire wear and corrosion on the surface of the wire rope is less than 40% of the diameter of the wire. Broken wire is less than 10% of the total number of wires in a twist distance. There is no breakage, no obvious thinning, no core escape, dead angle twisting, extrusion deformation;
 
* The ends of the steel wire rope are connected and the clamps, pressure plates, and cymbals are connected intact, without looseness, no less than 2 pressure plates, and no less than 3 clamps;
 
* No cracks on the drum, no looseness in connection and fixing;
 
* Tube wall wear is less than 20% of original wall thickness;
 
* The safety coil is no less than 2 turns, and the diameter ratio of the drum and the wire rope meets the requirements;
 
* The balance wheel is fixed well, and the wire rope should meet the requirements;
 
* The brake has no cracks, no looseness, no serious wear, and the brake gap is of equal size on both sides, with sufficient braking force, and the brake belt wear is less than 50% of the original thickness.
 
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