Detection device and method for improving layer-to-layer transition of steel wire ropes

A device for detecting a layer-to-layer transition of a lifting steel wire rope, the device comprising:

• a reel assembly configured to wind a steel wire rope around a reel and to drive said reel to rotate;
• a steel wire rope tensioning assembly configured to provide a tension on a segment of the steel wire rope;
• a steel wire rope loading assembly configured to provide a vertical loading to the steel wire rope tensioning assembly so as to generate a loading force between a tensioned steel wire rope and the steel wire rope wound around the reel;
• and
• a lead screw sliding assembly configured to drive the steel wire rope tensioning assembly to move on a horizontal guide rail to generate a relative displacement between the tensioned steel wire rope and the steel wire rope wound around the reel,
• wherein the steel wire rope tensioning assembly is connected to the steel wire rope loading assembly via a first threaded rod and a static torque sensor.

A method for detecting a layer-to-layer transition of a steel wire rope on a multi-layer winding reel, the method comprising the steps of:

• attaching a steel wire rope wound on a reel to a steel wire rope tensioning plate via a first and a second hook, or via a third and a fourth hook;
• rotating a first threaded rod or a second threaded rod to tension the steel wire rope retained between the hooks;
• placing a clump weight on a press plate for compressing the steel wire rope retained between the hooks against the steel wire rope wound on the reel, wherein a compression force between the steel wire ropes can be controlled by adjusting the clump weight, said clump weight being attached to the press plate using a threaded rod and a bolt;
• driving a lead screw to rotate, using a variable frequency motor, thereby moving horizontally a lead screw sliding block along said lead screw, so as to drive a steel wire rope tensioning assembly and a steel wire rope loading assembly to move horizontally along a horizontal guide rail as a whole, allowing friction to occur between the steel wire rope on the hooks and the steel wire rope wound on the reel due to said relative sliding;
• and
• determining a friction performance of a layer-to-layer transition of the steel wire ropes by:
• rotating a middle plate horizontally along arc-shaped slots on the press plate so as to change an angle between said middle plate and said press plate, implementing a different-angle friction between the steel wire ropes, and/or
• moving fixable sliding blocks on bare shaft sliding rails so as to adjust vertically a position of side plates on said bare shaft sliding rails, rubbing the steel wire ropes in a curved state, and by driving the reel to rotate using another variable frequency to create a more complex friction,
• wherein a torque sensor measures an output torque of another variable frequency motor, a first tension and compression sensor measures a frictional resistance between the steel wire ropes, a second tension and compression sensor measures a tensile force on the steel wire rope, and a static torque sensor measures a torque experienced by the steel wire rope.