Advantages of high-strength traction elevator steel wire rope
Pubdate:
2023-11-06
When the structure and diameter of the steel wire rope are the same, as the tensile strength level of the steel wire rope increases, the small breaking force of the steel wire rope also increases, and the safety factor also increases.
When the structure and diameter of the steel wire rope are the same, as the tensile strength level of the steel wire rope increases, the small breaking force of the steel wire rope also increases, and the safety factor also increases. On the one hand, under the same small breaking force, the diameter of high-strength and low-strength steel wire ropes should be reduced, and the ratio of traction wheel diameter to steel wire rope diameter can be increased, which is beneficial for improving the fatigue resistance of steel wire ropes and extending their service life; Alternatively, the diameter of the traction wheel can be reduced, and the mass star per unit length of the steel wire rope decreases as the diameter decreases, which can reduce the usage of the steel wire rope and save steel. On the other hand, with the rise of small machine room or inorganic room elevators, many elevator companies have chosen to use small diameter elevator ropes as the main traction rope design to adapt to compact traction systems and save space as much as possible. The "Safety Code for Elevator Manufacturing and Installation" allows traction steel wire ropes with a small diameter of 8mm and a diameter of 10mm, which has become the mainstream in elevator design. The proportion of using 8mm traction steel wire ropes with smaller diameters is also increasing year by year.
The method of improving the surface hardness of the traction wheel rope groove is technically feasible. With the continuous development of construction technology, the requirements for the operating speed of elevators are becoming higher and higher. In order to ensure safe operation, it is necessary to ensure that the traction steel wire rope has sufficient strength. There are various ways to improve the strength of steel wire ropes, such as eliminating traction steel wire ropes with lower strength levels and replacing them with high-strength steel wire ropes, such as 1960/2160, 1770/1960MPa, etc. The manufacturing process of steel wire rope can also be improved, such as using steel cord and wire rod to manufacture steel wire rope, which can greatly improve the strength of the steel wire rope. This is because the wire rod used for steel cord adopts a special smelting technology. The steel used has a low impurity content, no obvious central segregation, surface decarburization and other defects, only containing A and D impurities, and the latter is less than 0.5 grade. It is plastic and has a size of less than 0.5 pum. The wire rod made from this steel has many advantages such as pure material, high ultimate compression rate, small fluctuations in chemical composition, and uniform mechanical properties. Therefore, it can be said that the wire rod used for steel cord is an ideal material for manufacturing pulling steel wire ropes.
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