Electric hoist rope wear What are the reasons?

    Electric  hoist gantry crane  use, rope through drum or pulley when the entire load of pressure to bear on one side of the rope, the radius of curvature of the root thin wire not identical. Also, because the rope bent, thin steel wire rope inside the root will generate force and produce another slip, then contact stress between stocks and shares increases, the share between adjacent wires produce local indentation furrow. When repeated cycles stretch bending, is generated in the deep recesses of stress concentration was broken, constitute internal wear.

       Usually thin wire rope surface pressure and the pressure proportional to the tension of the same case, since the electric hoist  gantry crane  rope different pressure area, the pressure per unit area is different. Under pressure from the surface wear of view, the use of line contact wire rope advantageous than using point contact, the use of surface contact wire rope line contact than using more favorable. In addition, the degree of bending wire rope, velocity, internal wear on the rope are affected. Obviously, the selection line contact or surface contact type of rope is an effective way to reduce internal wear.

        Due to vibration, impact caused by collision damage rope surface, called deformation wear, which is a phenomenon of partial wear. If the surface of the wire rope drum impact by other objects, electric hoist  bridge gantry crane  hoisting rope wrapped around each other to fight, or because the roll center of the pulley and the resulting bite rope deflection phenomenon will cause the wire rope deformation wear. This deformation wear and deformation due to local press, the wire cross-section extending to the sides at the extrusion into a fin-shaped. From outward appearances, wire width expansion, although much reduced wire cross-sectional area, but the local press at the steel surface material hardened, easily broken wire.

       In the course of wire rope and the pulley groove outer periphery, drum set, a top hook surface wear caused by the contact part of the external wear. The external worn rope diameter becomes thinner, the outer peripheral surface is polished fine steel. External wear of the rope to bear the load of the wire cross-sectional area decreases, the rope breaking load is reduced accordingly.

      Wear a single week than the whole week wear worse, electric hoist gantry crane hook group it should be possible to make a single week of the wire to wear uniform wear all week. Entire length of the wire should be as far as possible uniform wear. Such as cranes wire rope used for the first medium-term, generally extend rope life 30% to 40%.