Factors of Safety Performance of Wire Rope

Release time:

2021-09-10

With the increase in the number of elevators used, the number of elevator accidents has gradually increased, and elevator safety has attracted widespread attention. So, what factors affect the safety performance of the wire rope? With the hundred small series to see it!

Factors of Safety Performance of Wire Rope

With the increase in the number of elevators used, the number of elevator accidents has gradually increased, and elevator safety has attracted widespread attention. What factors have influencedwire ropeWhat about the safety performance? Let's take a look at it with the Baikete editor!

1. Design factors and wire rope selection

The current mainstream design is to use a traction sheave with a diameter of 400mm and a wire rope with a diameter of 10mm. At this time, the rope diameter ratio takes the limit value of 40, while the past design mostly uses a rope diameter ratio of more than 50 times. The choice of the limit value of the rope diameter ratio will inevitably make the wire rope bear greater bending, thus affecting the life of the wire rope. At the same time, due to the wire rope diameter thinning, the uniformity of wire rope diameter, core quality, grease quality, wire rope structure selection design and twisting quality put forward more stringent requirements, if according to the original design to provide wire rope can not meet the current requirements. The use of more reasonable wire size, the use of pre-deformation, strand oil, rope process tension control, online pre-tensioning and other process measures, can play a role in improving the wire rope breaking force and fatigue life. Under the premise of the application of permanent magnet synchronous gearless traction machine, the manufacturing process of wire rope needs to be greatly improved to meet the needs of the market.

2. Installation Factors

Incorrect wire rope cutting, laying, installation and maintenance methods are also another main reason for the sharp shortening of wire rope life. For elevators that use 2:1 rope winding, the rope laying method of the steel wire rope needs to be completely improved during installation, so as to ensure that the steel wire rope does not kink or generate internal stress during rope laying and installation. Otherwise, the steel wire rope has internal stress, and the kink part will accelerate wear., Wire breakage and strand breakage will occur soon. For example, the I-wheel winding the wire rope is supported by the bracket, and the installation is carried out by the lead rope according to the rope winding sequence, which can ensure the installation quality and avoid kinking of the wire rope. It is urgent to effectively improve the quality of installation workers, carry out necessary training and improve the quality of wire rope installation. In recent years, many elevator companies have adopted a new type of elevator without scaffolding, using the elevator car itself as a lifting platform, assembling the car at the bottom, and grafting the guide rail by lifting the car. Since the tension of the wire rope is not strictly adjusted at first, the tension difference is too large, and the damage of one or several wire ropes with excessive force is accelerated. Recommendations on completionSteel wire rope installationAfter the process, adjust the wire rope tension in time to ensure uniform wire rope tension. In daily use, a special wire rope tension detection device should be used regularly to check and adjust the wire rope tension.

All in all, the safety of elevator equipment is of great importance. Once an accident occurs, it will bring great harm to the safety of people's lives and property, and it will also cause great adverse effects to the society. Therefore, the phenomenon of broken wire of elevator wire rope must be highly valued, and strict supervision should be carried out from all aspects of wire rope design and selection, installation, daily maintenance and management. When problems are found, corresponding improvement measures must be taken in time to avoid further expansion of problems and effectively ensure the safe operation of elevators and protect the lives and property of the people.