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  • Q P35 Troubleshooting Problem ①

    Mechanical damage caused by the rope contacting the structure of the installation on which it is operating or an external structure-usually of a localised nature。
    >Generally results from operational conditions.
    >Check sheave guards and support/guide sheaves to ensure that the rope has not “jumped out” of the intended reeving system.
    >Review operating conditions.
  • Q P35 Troubleshooting Problem ②

    Opening of strand in rotation resistant,low rotation and parallel closed ropes-in extreme circumstances the rope may develop a “birdcage distortion” or protrusion of inner strands.
    Note-rotation resistant and low rotation ropes are designed with a specific strand gap which may be apparent on delivery in an off tension condition.These gaps will close under load and will have no effect on operational performance of the rope.
    >check sheave and drum groove radii using sheave gauge to ensure that they are no smaller than nominal rope radius +5% ZhongYing recommends that the sheave and drum groove radii are checked prior to any rope installation.
    >Repair or replace drum/sheaves if necessary.
    >Check fleet angles in the reeving system-a fleet angle in excess of 1.5 degrees may cause distortion.
    >Check installation method-turn induced during installation can cause excessive rope rotation resulting in distortion.
    >Check if the rope has been cut “on site” prior to installation or cut to remove a damaged portion from the end of the rope.If so,was the correct cutting procedure used?Incorrect cutting of rotation resistant,low rotation and parallel closed rope can cause distortion in operation.
    >Rope may have experienced a shock load.
  • Q P35 Troubleshooting Problem ③

    A Broken wires or crushed or flattened rope on lower layers at crossover points in multi-layer coiling situations.
    Wire breaks usually resulting from crushing or abrasion.
    >Check tension on underlying layers.ZhongYing recommends an installation tension of between 2% and 10% of the minimum breaking force of the wire rope,Care should be taken to ensure that tension is retained in service,Insufficient tension will result in these lower layers being more prone to crushing damage.
    >Review wire rope construction.ZhongYing wire ropes are more resistant to crushing on underlying layers than conventional rope constructions.
    >Do not use more rope than necessary.
    >Check drum diameter.Insufficient bending ratio increases tread pressure.

  • Q P35 Troubleshooting Problem ④

    Wires looping from strands
    >Insufficient service dressing.
    >Consider alternative rope construction.
    >If wires are looping out of the rope underneath a crossover point,there may be insufficient tension on the lower wraps pm the drum.
    >Check for areas of rope crushing or distortion.
  • Q P36 Troubleshooting Problem ⑤

    A One line of broken wires running alone the length of the rope indicating insufficient support for the rope,generally caused by oversize sheave or drum grooving.
    >Check to see if the groove diameter is no greater than 15% greater than the nominal rope diameter.
    >Repair or replace drum/sheaves if necessary.
    >Check for contact damage.




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