Maintenance method for elevator traction wire rope - News - Global IC Trade Starts Here Free Join

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The traction wire rope is an important suspension device for the elevator, which bears the entire weight of the car and the counterweight, and drives the car to move up and down by the friction of the traction wheel groove. During the operation of the elevator, the traction wire rope is bent unidirectionally or alternately around the traction sheave, the guide wheel or the reverse sheave, and tensile stress is generated. Therefore, the traction wire rope is required to have high strength and wear resistance, and its tensile strength, elongation, flexibility, etc. should meet the requirements of GB8903. It is precisely because the damage degree and carrying capacity of the traction wire rope is directly related to the safety of human life and property, how to perform correct periodic inspection and lubrication maintenance during the use process is particularly critical.

Advantages of using non-destructive testing methods for traction wire ropes:
1, more reliable, higher sensitivity, can accurately identify the internal and external defects of the wire rope, to ensure safety;
2, more economical, through quantitative testing, to avoid the regular replacement of wire ropes resulting in great waste, to achieve rational use of resources, and effectively reduce the cost of elevator use;
3. Easy operation and improved efficiency.

Lubrication maintenance of the elevator traction wire rope During the use of the elevator, the wire rope should be cleaned and lubricated in a timely manner. Lack of maintenance is one of the main reasons for the short life of wire ropes.

In the regular inspection of elevators, inspectors often find that the surface of the traction wire rope is covered with a layer of oil, which is formed by the mixture of lubricating oil and dust oozing out from the wire rope. If it is not cleaned in time, it will not only affect the service life of the wire rope, but also It will change the friction coefficient of the hoisting rope in the traction sheave and reduce the traction ability. In the case of light or heavy load of the car, the hoisting rope may slip and the car will be topped or bottomed.

Normally, most of the new factory wire ropes have been lubricated at the time of production, but the grease loss will be reduced during use. In view of the fact that the lubrication can not only protect the wire rope during the transportation and storage, but also reduce the wear between the wires during the use of the wire rope, between the strands and between the wire rope and the traction sheave, and the use of the extended wire rope Life is also very beneficial. Therefore, in order to minimize the damage to the wire rope caused by corrosion and abrasion, it is necessary to carry out lubrication inspection. First of all, we must choose the appropriate wire rope grease, elevator wire rope grease should use a special friction grease with a certain coefficient of friction, high-performance wire rope grease is the fundamental guarantee for maintaining the life of wire rope extension wire rope. When the wire rope is in operation, the internal three-dimensional fretting friction is required. This requires that the wire rope grease must have a strong penetrating property, that is, the lubricating oil molecule anti-wear component in the lubricating grease can penetrate into each wire. In addition, wire rope grease must also have strong adhesion properties. To ensure its uniform adhesion to each wire rope. There are usually several ways to lubricate the wire rope. One is to remove the wire rope and put it into the lubricating oil with a temperature of 80-100 degrees for about 2 to 4 hours. The other is to brush the lubricant directly on the wire rope. On the top, the key is to brush the method and spacing to be mastered. Generally speaking, the wire rope with a diameter of about 12mm is about 1 kilogram of lubricating grease per 40 meters. The brushing interval is about two weeks; the other is dedicated. The wire rope lubrication equipment lubricates the wire rope. This method is the most trouble-free, but the cost of the equipment is high. Which lubricant and lubrication method should be used in accordance with the requirements of the wire rope manufacturer. At present, elevator maintenance and maintenance units really pay attention to the maintenance of wire rope lubrication. Many units have become accustomed to replacing new wire ropes without paying attention to lubrication management.

Other cleaning and lubrication described above are only for the wire rope itself, which is only one aspect of ensuring the safe use of the wire rope. In addition, the peripheral conditions of the wire rope, such as the surface wear of the traction sheave and the geometry of the wheel groove, must be checked to ensure that the wire rope is always in good contact during operation to reduce friction. Ensure the safe operation of the elevator.