Wire rope common sense

Steel wire rope composition

1. Steel wire

During the use of steel wire ropes, it needs to bear the effect of transition load. The use of the use of steel wire is mainly determined by steel wire mechanical performance, wire surface state and steel wire rope structure. The steel wire material includes carbon steel or alloy steel, which is made of cold or cold rolling. The horizontal section of the steel wire is round or alien (T -shaped S type Z). High tensile strength and toughness, and appropriate surface treatment of steel wires to meet the needs of different environmental conditions.

2. Rope core

The main function of the rope core is to support the wire rope to achieve a stable cross -section structure. The rope core includes steel cores and fiber cores, the fiber core includes natural fiber cores and synthetic fiber cores, natural fiber cores such as sword tatto, jaoseki, and Cotton lines, etc., synthetic fiber cores include polyethylene and polypropylene filament. The natural fiber core can store more lubricating fat, which can lubricate the wire rope and extend the life of the wire rope.

3. Lubrication

The steel wire rope is sprayed with lubricating fat during the twisting process. There are two main effects. It plays a role in suppressing.

Wire rope

Types of wire rope

1. The steel wire rope can be divided into four types: left -handed, right, right, left -handed, and right interactive twisting method. The right interactive twist wire rope is often used in lifting operations.

2. According to the different material of the wire rope core material, it can be divided into three types: hemp core, asbestos core and metal rope core. Among them, the hemp core rope is often used in the lifting operation. Due to the lubricant in the hemp core The role of friction and corrosion.

3. According to the differences in wire rope and the number of wires and the number of wires, it can be divided into three types: 6 × 19, 6 × 37, and 6 × 61. The most commonly used in lifting operations is 6 × 19 and 6 × 37 wire ropes.

4. According to the surface of the wire, it can be divided into two types: light surface and a bowl. Light surface steel wire rope is commonly used in lifting operations.

5. Classify the structure of the steel wire rope, and it can be divided into point contact rope, line contact rope, and surface contact rope. The diameter of the steel wires of the contact rope is the same, but the splitting distance of each layer is different. Therefore, the steel wire crosses each other to form point contact. The contact stress is very high in work. The steel wire is easy to wear and breaks, but its manufacturing process is simple. The thickness of the steel wire in the line contact rope is different, and the fine steel wire is placed in the groove of the thick steel wire, and the thick and thin steel wire is in contact with the line contact state.

Wire rope

Features of steel wire rope

1. The wire rope can pass the long -distance load.

2. The safety factor of carriers is large, and the use of safety and reliability.

3. Light weight and weight, easy to carry and transport.

4. Can withstand the effects of multiple loads and loads.

5. Has high tensile strength, fatigue strength and anti -impact toughness.

6. Under high -speed working conditions, wear resistance, earthquake resistance, and operating stability.

7, good corrosion resistance, can work normally in the harsh environment of various harmful media.

8. Good soft performance, suitable for many aspects such as traction, pulling, and binding.

How to buy steel wire rope

When choosing a wire rope, consider different uses:

1. Steel rope is broken: Under the condition of the diameter of the wire rope and the tensile strength, the steel wire rope with a large metal density coefficient (that is, the ratio of the cross -sectional area of the wire to the rope) should be selected. Generally, the density coefficient of the wire rope is the sequence of the density coefficient of the wire is that the surface contact rope is greater than the line contact rope, and the line contact rope is greater than the point contact rope.

2. Fatigue resistance: In general, the face contact rope is better than the line contact rope, and the line contact rope is better than the point contact rope; pre -tensor rope is better than pre -tensor rope; ; Fiber rope core rope is better than metal core rope.

3. Abrasion resistance: The larger the surface of the steel wire of the wire rope and the toll wheel or the roll tube, the smaller the contact stress, the better the wear resistance. Therefore, the order of abrasion resistance is sealed Stock rope and round stock rope. For external wear resistance, the outer steel wire diameter is relatively strong; for internal wear to resist, line contact, and surface contact than point contact are superior.

4. Volume resistance: It is mainly manifested in the ability to resist structural deformation when the stamping of the horizontal agent. Generally, the metal rope core is better than the fibrous rope core, and the shares are less than the stock silk. The line contact is better than the point contact. The face contact is better than the line contact.

5. Softness: The more the wire roots of the wire when the rope diameter is the same, the larger the deficiency coefficient (the ratio of the diameter of the wire rope to the rope in the rope), the greater, the better the softness.

6. Cortency resistance: Most of the steel wire ropes are used in the atmospheric environment and even acid or alkali corrosive media. Practice has proved to choose galvanized, zinc and aluminum alloy, oil sealing rust, reducing the rope core water content, coating nylon, plastic and other anticorrosive measures. It will increase the life of the wire rope.

7. Structural extension and elastic modulus: In cases where it is troublesome or difficult to adjust or difficult to adjust the rope, you should choose a steel wire rope with small structure extension and large elastic modulus. Under normal circumstances, metal rope wire rope structure.

Wire rope

How to use and maintain steel wire rope

The correct use and maintenance method of steel wire rope:

1. Use the qualified steel wire rope to ensure that its mechanical properties and specifications meet the design requirements.

2. It is necessary to ensure that the steel wire rope is sufficiently safety coefficient. If necessary, you must calculate the force before use, and you must not use the scrapped steel wire rope.

3. When performing a secondary shift, the steel wire rope should be checked.

4. When using the wire rope, you should avoid the cross and overlapping pressure of the two steel ropes to prevent knotting, twisting, excessive bending and grinding.

5. Reduce the number of bending of the wire rope to avoid reverse bending.