According to the contact state between the adjacent layers of steel wires in the strand, it is divided into three types: point contact, line contact or surface contact.
① Steel wire rope with point contact: The diameter of the steel wires in the strands is the same, the lay angle between the steel wires in each layer is the same, and the lay length is different, so the inner and outer layers of steel wires cross each other and are in a point contact state.
②Wire rope in line contact: the lay length of each layer of steel wire in the strand is the same and the lay angle is different. Under the same conditions of use, the service life of line contact wire rope is longer than that of point contact wire rope.
③Compacted steel wire rope, formerly known as surface contact wire rope, during the twisting process of the steel wire rope, through forging, drawing, etc., the contact surface is formed between the steel wires, including strand rope compaction, wire rope compaction and double strand compaction, etc. .
④Sealing steel wire rope: The outer layer is made of special-shaped steel wire, including steel wire with T-shaped S-shaped Z-shaped section structure, with smooth surface and good wear resistance. Compared with other types of steel wire ropes of the same diameter, the tensile strength is higher, and It bears lateral pressure, but has poor flexibility, complex process and high manufacturing cost. It is often used as a bearing cable, such as cable cranes and cables on aerial ropeways.
