General safety check hoist drum

Rope hoist drum by pressing action, but also by causing the bending and torsion wire effect,bridge gantry crane and plays a major role in extrusion. Cracks have occurred since the roll, the roll indentation rope accident, so check out the drum have cracks should be scrapped, the spool shaft by bending and shear stresses, should be discarded if cracks are found, otherwise there accidents can happen off-axis; reel rope groove wear depth should not exceed 2mm, when more than can be re-grooving, but roll wall thickness of not less than 80% of the original; wheel up and down without cracks, screw on connections to tighten.

Wire rope on the drum groove wandering off overhaul, when the wire rope groove angle is relatively large, the rope will wear groove edges or even quit, causing severe rope wear. For relatively rope wire rope groove drum grooves to allow deflection of 4 ~ 5 °, when more than 6 °,hoist gantry crane the rope may quit, the general common cause is a hook pulley from the roll distance is too small, then do the appropriate adjustments. May be due to the drum pulley hook skew safe position, may have inclined deflection caused by the goods leaving the rope hanging quit.

In addition, new for wire rope, if twisted rope wrapped around the roll stiffness (due to roll on the wooden prehensile) did not relax, but also make rope quit, and even crossing a rope pulley correct together, in order to prevent the accident, you can put suspended by rope into a disk gradually liberalized straightened,bridge crane twisting stiffness can be completely gone.