What is the crane reel systems and components ?


1-Monospiral winding reel

• High tensile loads can occur during winding
• Torsional stresses through the use of guiding pulleys
• High speed in combination with changing bending
direction
• Reverse bending "S-type" due to mid feeding point
• Abrasion through the inner spokes of the drum body
• Temperature drops effect the cable jacket rigidity


2-Spreader winding reel
•  Very high tensile load from vertical pull
• The metal cleaves on the drum body may lead to abrasion
• Cable must withstand oil and grease
• Temperature drops effect the cable jacket rigidity

3-Random winding reel
• Random winding on the drum
• Smaller bending radii stress the copper conductors
which need to be flexible

4-Level winding reel
• Torsion to the cable through the use of a special
guiding device
• Bending via the special guiding device
• Winding of one layer has to be exact over the large
width of the reel body
• Extreme ambient influences on the jacket (e.g. UV,
ozone, coal dust, graphite)
• Max 2 layers on drum body because of heat
emanation



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