What factors are affected by the quality of the elevator steel wire rope?
What factors are affected by the quality of the elevator steel wire rope?
To ensure the safety of the elevator, it is important to choose a steel wire rope with good quality elevators. What factors are affected by the quality of the elevator steel wire rope? Let us start with the wire used in the manufacturing steel wire rope.
The impact of rope -making steel wire
The gold phase tissue that is suitable for high -quality carbon steel wire is suitable for pulling and obtaining the best mechanical performance.
In production due to the surface damage of the wire, or severe scratches, spots, rust pits, and non -metallic miscellaneous objects formed in the smelting section of its steel, it is easy to form a source of fatigue.
The content and particle size distribution of non-metallic inclusions in steel have very important harm to the fatigue performance of elevator steel wire rope. Because the mesh structure ferrite in the metallurgical structure will make the fatigue crack expand efficiently, the mesh structure ferrite is not allowed to exist in the lead heat treatment steel wire. The austenitizing temperature of steel wire and the transition temperature of the isothermal process of lead heat treatment are critical to the formation of ferrite network structure. The temperature control of the automatic control system of the equipment of the lead heat treatment production line and the technology of lead temperature are beneficial to the uniform sostenitizing structure. The circulation system of lead liquid is beneficial to the uniform sostenitizing structure of steel wire in different positions of the lead pan. This can ensure that the compressive strength of steel wire after heat treatment is more symmetrical, fully ensure that the mechanical property fluctuation range of steel wire after drawing is minimum.
During the pull-up link, the spacing of the tissue tissue of the cable will be further reduced and the density density will be increased. The composition of the best strength and toughness of the steel wire will help improve the fatigue performance of the elevator's steel wire rope.
Selection of elevator steel wire rope structure
The structure of the steel wire rope for elevators has an important impact on the fatigue resistance of the wire rope. Generally, the surface contact with the wire rope is better than the wire contact wire rope, and the wire contact wire rope is better than point contact wire rope.
For elevator wire ropes, which are limited by the application work status,
Almost of the elevator ropes are mostly exposed to steel wire ropes with 6 or 8 shares, and most of the fast elevators use parallel surface twisted wire ropes.
According to the design concept of contemporary elevator steel wire rope, maintaining a moderate gap in the middle of each strand and each layer of steel wire in the elevator steel wire rope is beneficial to improve the balance of fatigue resistance of steel wire rope, but must ensure that the gap is uniform and consistent, so the wire distance preparation of wire rope in the internal structure of wire rope, wire distance size tolerance, fiber core diameter is particularly important.
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