Characteristics of steel wire ropes with different structures

The steel wires in the strand are laid in layers. Due to the different lay distances of each layer, the steel wires in each layer cross each other and make point contact. The steel wire rope of this structure is generally not used as an important purpose. As shown in the picture:

Typical structure of point contact wire rope:

6 × 19 + FC (IWR, IWS), 6 × 37 + FC (IWR, IWS), 6 × 61 + FC (IWR, IWS), 6 × 24 + 7fc, 18 × 19 + FC (IWS), etc

Characteristics of point contact wire rope:

1. Except for the center wire, all wire diameters of point contact wire rope are the same.

2. The spiral lines of the adjacent layers of the point contact wire rope strands are not parallel to each other and are in staggered contact.

3. The steel wire on the upper layer of point contact steel wire rope shall not be nested in the adjacent steel wire groove on the next layer.

4. The number of wires in each layer of point contact wire rope increases by 6 layers from inside to outside.

5. The steel wire in the point contact wire rope strand is in point contact. When the steel wire rope bears the load, the contact stress between the steel wires is large.

Wire contact (parallel lay) wire rope:

All wires in the strand are made in one lay. Each layer of steel wire has the same lay distance (lay flat) and contacts in a linear manner. As shown in the picture:

Basic structure of wire contact wire rope strand:

Seal (s), Wallington (W), fill (FI)

Seal type (s): in the arrangement of steel wires, the number of steel wires in inner layer and outer layer is equal.

Wallington type (W): in the arrangement of steel wires, the number of outer layers is twice the number of inner layers, and the number of outer layers is arranged alternately.

Filling type (FI): in the arrangement of steel wires, thin steel wires with the same number of wires as the inner layer are filled between the inner layer and the outer layer.

The above three structures are combined with each other to form a variety of composite line contact structures.

Typical structure of wire contact wire rope:

6×19S+FC（IWR）、6×19W+FC（IWR）、6×25Fi+FC（IWR）、6 ×29Fi+FC（IWR）、6×26WS+FC（IWR）

6 × 31ws + FC (IWR), 6 × 36ws + FC (IWR), 6 × 41ws + FC (IWR), 6 × 49sws + FC (IWR), 6 × 55sws + FC (IWR), etc.

Characteristics of wire contact wire rope:

1. All wires in the wire contact rope are parallel to each other and will not be staggered. The lay distance of each layer of wires is equal, and the lay angle of wires is not equal.

2. The adjacent steel wires of wire contact wire rope are embedded into the groove.

3. The diameter of wire in contact with each layer of wire rope is not equal, but there is a proportional relationship.

4. When the wire contact wire rope bears the load, the contact stress between the wires is smaller than that of the point contact wire rope.

Compacted strand wire rope:

When the wire rope is twisted, the diameter of the strand becomes smaller, the surface of the strand becomes smooth, and the contact surface between the wires increases. The steel wires in the strand are in contact with each other with a spiral surface, which is the basis of the online contact structure. As shown in the picture:

Typical structure of compacted strand wire rope:

6×K7+FC（IWS）、6×K19S+FC（IWR）、6×K25Fi+FC（IWR）、6 ×K26WS+FC（IWR）、 6×K29Fi+FC（IWR）、

6 × k31ws + FC (IWR), 6 × k36ws + FC (IWR), etc.

Characteristics of compacted strand wire rope:

1. After the strand of compacted strand wire rope is compacted, the steel wire in the strand is no longer a circular section, and the steel wire and the steel wire contact each other with a spiral surface.

2. The filling coefficient of the metal in the compacted strand is large (generally above 0.9), and the empty yard between the wires is small.

3. The peripheral surface of the compacted strand becomes smooth.

4. The structure of the compacted strand is stable and the structural elongation is small.

5. Compared with the common round strand wire rope, the compacted strand wire rope has higher breaking force; the contact area between the compacted strand wire rope and pulley or drum is large, which makes the solid strand wire rope more wear-resistant and corrosion-resistant; when the wire rope is used on the multi-layer coiling drum, the smooth surface of the compacted strand wire rope ensures that the adjacent ropes will not occur due to mutual friction This feature makes the compacted strand wire rope more suitable for multi-layer coiling.

6. When the compacted strand wire rope bears the load, due to the large contact area between the wires, the contact stress between the wires is smaller than that of the wire rope.

Composition of plastic coated steel wire rope:

Plastic coated steel wire rope is to apply plastic layer on the outer surface of steel wire rope strand, rope core or steel wire rope. All wire ropes can be made into plastic coated wire ropes. As shown in the picture:

Features of plastic coated steel wire rope:

1. The contact stress between the plastic coated steel wire rope strands and between the outer strand and the steel core is small.

2. Plastic coated steel wire rope is resistant to corrosion.

3. The abrasion between the inner strands of plastic coated steel wire rope and between the steel wire rope and pulley and drum is small.

Composition of triangular strand wire rope:

A wire rope made by twisting a layer (or layers) of wire around a triangular strand core. As shown in the picture:

Typical structure of triangular strand wire rope:

6V × 19 + FC (IWR), 6V × 21 + 7fc, 6V × 24 + 7fc, 6V × 34 + FC (IWR), 6V × 37 + FC (IWR), 6V × 30 + FC (IWR), 6V × 43 + FC (IWR) 6V × 37s + FC (IWR), 6 × v25b + FC (IWR), 6 × V28B + FC (IWR), etc.

Characteristics of triangular strand wire rope:

1. The contact area between triangular strand wire rope and coil or pulley is large, which is 3-4 times of that of round strand wire rope, reducing wear.

2. The contact points between triangular strand and strand are increased, so the compression resistance and fatigue resistance are good.

3. The metal effective sectional area of triangular strand wire rope is large, and the minimum breaking force can be increased by 20-25% compared with the same diameter round strand wire rope.