Wire ropes are classified by twisting

The wire rope can be divided into a single rope, a double rope and a three rope according to the twisting level.

Single rope

It is made of a number of thin steel wires around a metal core. It has poor flexibility and is easy to wear and break when repeatedly bent. It is mainly used as a tensioning cable that does not move.

Double rope

After the wire is twisted into a strand, the strand is twisted into a rope around the core. The commonly used rope core is a hemp core, and the metal core twisted with asbestos core or soft steel wire should be used for high temperature operation. The rope core is dip coated with lubricating oil to reduce the damage caused by friction between the wires. The double-wound rope has better flexibility, is simple to manufacture, and has the widest application.

Three roping

The double-wound rope is used as a strand and then twisted into a rope around the double-wound rope core, and the flexibility is good; but the manufacturing is complicated, and the steel wire is too thin and easy to wear, so it is rarely used. The winding direction of the wire rope is two kinds of winding and intersecting. The winding direction of the wire twisted into a strand is the same as the winding direction of the strand twisted into a rope. The wire between the wire ropes is better in contact, the flexibility is better, the service life is longer, but there is a tendency of torsion looseness, which is not suitable as a lifting rope for lifting the weight at the free end, and can be used as a guide rail for heavy objects. Lifting rope or traction rope. The twisting of the wire into the strands is the opposite of the winding of the strands into the rope. The twisted steel wire rope is not easy to twist and loose, and is widely used in lifting work.

a Right interaction 捻ZS: Rope right 捻, the direction of the left 捻 捻 与 与 与 与 与 与 与 与 与 与

b Left interaction 捻SZ: rope left 捻, right 捻

c Right same direction 捻 ZZ: rope right 捻, right 捻

d Left-same 捻: Rope left 捻, strand left 捻

e Right mix 捻: rope right 捻, part of the left 捻, part of the right 捻

f Left mixed 捻: rope left 捻, part of the right 捻, part of the left 捻

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