Stress characteristics of wire rope in overhead crane engineering

Stress characteristics of wire rope in overhead crane engineering: overhead crane engineering wire rope under complicated stress: when the load, tensile stress of steel wire rope, bending stress, compressive stress and steel wire rope for residual stress. When the wire rope around the pulley when subjected to alternating stress and fatigue of the metal material, eventually because of the steel wire rope and the rope groove, wire rope between wear and breaking tests show that:

1. The bending radius of the wire rope has a great influence on the wire rope. This is because the bending deformation of the steel wire is increased and the bending stress is increased when the diameter of the sheave is reduced. Therefore, the wear of the steel wire is accelerated, the fatigue damage is accelerated and the life of the wire rope is shortened.

2. Wire rope around the sheave, the rope and the rope contact surface pressure and relative sliding, so that the wire rope wear broken wire, the greater the contact stress, broken wire more quickly;

3. Point contact with wire rope, due to the contact stress between the wire, the cross of the wire and increase the lateral pressure, the strength loss than the line contact type, anti-fatigue performance is poor, so the line contact wire rope point of contact with long rope life;

4. When the overhead crane engineering wire rope between a twist between the number of broken wire to reach 10% of all the wire, continue to use, rope broken wire rate significantly accelerated, short-term there is broken stock;

5. When the other conditions are the same, the higher the safety factor of the selected wire rope, the longer the service life.