Crane Wire Rope Service Life

The crane steel wire rope is one of the important components to bear the heavily. Wire rope service life and replacement cycle are one of the key factors for the safe operation of the crane. The following will be discussed from the decisive factor of the service life, the detection and maintenance of the wire rope, and the replacement cycle.

1. Decisive Factor in Service Life
The steel wire rope service life is affected by multiple factors, which mainly includes the following points:

(1) Dynamic Load: The dynamic load refers to the force of the wire rope during the runtime. It is one of the main factors that determine the life of the wire rope. If the loading capacity of the wire rope for a long time will cause the fatigue damage of the wire rope.

(2) Static Load: Static load refers to the force of the wire rope under the suspension and static state, which will also affect the wire rope service life. If you are in a static load for a long time, the wire rope will be compressed, curved, etc., resulting in shortening the fatigue life of the wire rope.

(3) Working Environment: Factors such as high temperature, low temperature, humidity, and corrosion in the working environment will affect the wire rope service life. Especially in a humid and corrosive environment, the wire rope is easily damaged by corrosion, and then shorten the service life.

(4) Maintenance: Regular inspections, cleaning, lubrication and maintenance steel wire rope can help extend the service life. Properly handle problems such as the wear, filament, corrosion of the wire rope, which can reduce the consumption of life.

2. Detection and Maintenance of Steel Rope

In order to ensure the operation of the crane, the wire rope should be tested and maintained regularly. Common detection methods include visual inspection, ultrasonic detection, magnetic powder detection, etc. These methods can detect problems such as cracks, broken wires, deformation, and corrosion of the wire rope.

(1) Visual Inspection

Regular visual inspections of the wire rope, mainly observe whether there are cracks, broken wires, and rust on the surface of the rope. If you find a problem, deal with it in time, such as replacing the wire rope to repair the rope head.

(2) Ultrasonic Detection

Ultrasonic detection is a commonly used non -destructive detection method that can detect problems such as cracks and filaments inside the wire rope. Ultrasonic detection should be performed by professional and technical personnel to analyze and evaluate the test results.

(3) Magnetic Powder Detection

Magnetic powder detection is a method that combines magnetic materials and magnetic field detection. It can detect cracks and filaments on the surface and near surface of the wire rope. Magnetic powder detection should be performed by professional and technical personnel to analyze and evaluate the test results.

In addition to regular testing, the maintenance of the wire rope is also very important. Maintenance mainly includes cleaning, lubrication and maintenance. Cleaning wire rope can remove the dust, particles and other impurities on the rope to prevent further damaging the surface of the wire rope. Lubrication can reduce friction and wear between the wire rope and prevent the corrosion of the wire rope. Maintaining steel wire ropes can repair rope heads, replace damaged parts, etc.

3. Replacement Cycle
Due to the different conditions and work requirements, the replacement cycle of the crane steel rope does not have a uniform standard. Generally speaking, the cycle of replacing the wire rope should be evaluated according to the wear, filament, corrosion and other conditions of the wire rope. When the wire rope is severely worn or the number of filaments exceeds the prescribed standard, it needs to be replaced in time. Generally speaking, 70%-80%of the wire rope should be replaced in advance when the service life is 70%-80%.

In addition, the frequency of the dragon door hanging steel wire rope should also consider the actual situation of the working environment, especially in harsh environments, such as high temperature, corrosion and other conditions, the wire rope is more vulnerable to damage, and the replacement cycle may be shortened accordingly.

In summary, the wire rope service life and replacement cycle of the crane steel rope are affected by multiple factors, such as motion, static load, working environment, maintenance, etc. Regular testing and maintaining steel wire rope is one of the important measures to ensure its safe operation. The replacement cycle shall be evaluated according to the wear and filament of the wire rope, and the actual working environment shall be determined.

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