High-strength steel wire rope for large-sized hoisting machine

Abstract

The utility model provides a high strength steel wire rope for large -scale hoist belongs to steel wire rope technical field. It contains one ultrahigh molecular weight polyethylene rope core, one flexible layer, predetermined quantity's reinforcing steel wire, predetermined quantity's inner layer strand, predetermined quantity's outer layer strand, predetermined quantity's oil containing sector synthetic fiber strand, predetermined quantity's composite filling strand and one protective layer. Through the cooperation of above -mentioned structure, realized high -strength bearing, excellent flexibility and fatigue resistance. Ultrahigh molecular weight polyethylene rope core and flexible layer buffer stress in coordination, prevent the rope core from being damaged under pressure;The reinforcing steel wire between inner layer strand and flexible layer improves the tensile and extrusion resistance;Composite filling strand and sector oil containing fiber strand respectively improve the supporting property, disperse stress and provide continuous lubrication;The protective layer is composed of protective net, corrosion -resistant layer and wear -resisting layer, can prevent steel wire loose, resist corrosion and improve wear resistance. Thus, it can keep reliable operation under high load, frequent bending and complex environment.

Description

Technical Field

[0001] This utility model relates to the field of wire rope technology, specifically a high-strength wire rope for large cranes. Background Technology

[0002] Wire rope is a helical bundle of steel wires twisted together according to certain rules, meeting specific mechanical properties and geometric dimensions. It consists of steel wires, a core, and lubricant. Due to its high strength, light weight, smooth operation, and resistance to sudden breakage, it is highly reliable and used in material handling machinery for lifting, traction, tensioning, and load-bearing. However, due to structural design limitations, existing wire ropes for large cranes suffer from insufficient structural stability, strength, wear resistance, and breaking strength, resulting in a short service life and unreliable performance during use. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a high-strength steel wire rope for large cranes, which effectively improves some of the problems of insufficient strength in traditional steel wire ropes.

[0004] A high-strength steel wire rope for large cranes comprises an ultra-high molecular weight polyethylene (UHMWPE) core, a flexible layer, a predetermined number of reinforcing steel wires, a predetermined number of inner strands, a predetermined number of outer strands, a predetermined number of oil-containing fan-shaped synthetic fiber strands, a predetermined number of composite filler strands, and a protective layer. The UHMWPE core is wrapped around the flexible layer, the inner strands are uniformly twisted around the flexible layer, the outer strands are uniformly twisted around the inner strands in a surface-contact manner, and the protective layer is annularly arranged around the outer strands. The reinforcing steel wires fill the gap between the inner strands and the flexible layer, the composite filler strands fill the gap between the inner strands and the outer strands, and the oil-containing fan-shaped synthetic fiber strands fill the gap between the outer strands and the protective layer. The protective layer comprises a protective mesh layer, a corrosion-resistant layer, and a wear-resistant layer arranged sequentially from the inside out.

[0005] Preferably, a ring of fine steel wire is arranged inside the ultra-high molecular weight polyethylene rope core.

[0006] Preferably, the flexible layer is a polyester fiber flexible layer, a natural rubber flexible layer, a nitrile rubber flexible layer, or a thermoplastic polyurethane elastomer flexible layer.

[0007] Preferably, both the inner and outer strands include one central steel wire, ten fine steel wires, five medium-fine steel wires, and ten coarse steel wires; the five fine steel wires are twisted around the central steel wire, and the outer layer is staggered with five medium-fine steel wires and five fine steel wires, while the ten coarse steel wires are symmetrically twisted around the outermost layer.

[0008] Preferably, the composite filler strand comprises an inner steel wire and three jute yarn bundles and three polyamide bundles interlaced and twisted around the outer side of the inner steel wire.

[0009] Preferably, the fan-shaped synthetic fiber strands are aramid fiber strands, polyester fiber strands, polypropylene fiber strands, or polyamide fiber strands, and the fan-shaped synthetic fiber strands are fully impregnated with lubricating oil or rust-preventive oil.

[0010] Preferably, the protective net is a mesh sleeve woven from fine steel wire.

[0011] Preferably, the wear-resistant layer is an aluminum oxide wear-resistant layer.

[0012] Preferably, the corrosion-resistant layer is a phosphate corrosion-resistant layer.

[0013] Preferably, the inner strands and the outer strands have opposite twist directions.

[0014] The reinforcing steel wire is galvanized steel wire.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This utility model provides a high-strength steel wire rope for large cranes, comprising an ultra-high molecular weight polyethylene (UHMWPE) core, a flexible layer, a predetermined number of reinforcing steel wires, a predetermined number of inner strands, a predetermined number of outer strands, a predetermined number of oil-containing fan-shaped synthetic fiber strands, a predetermined number of composite filler strands, and a protective layer. The UHMWPE core itself possesses high strength, impact resistance, and fatigue resistance. Combined with the outer flexible layer, it effectively buffers stress concentration between the steel wires, preventing damage to the core due to long-term compression. The reinforcing steel wires between the inner strands and the flexible layer enhance the wire rope's resistance to compression and tension under high loads, thereby improving the overall breaking strength. The composite filler strands between the inner and outer strands not only improve the support and compression resistance between the steel wire strands but also absorb oil, buffer, and disperse stress, further extending the service life of the wire rope. The oil-impregnated fan-shaped synthetic fiber strands filling the space between the outer strands and the protective layer continuously release lubricating oil or rust-preventive oil, maintaining good lubrication of the wire rope strands during long-term operation. This effectively reduces friction, wear, and corrosion risks, decreasing maintenance frequency. Simultaneously, it reduces friction between the outer strands during use and transfers localized stress to the fan-shaped synthetic fiber strands when the outer strands are under load, reducing peak stress and thus lowering the risk of localized overload. The protective layer employs a composite structure consisting of a protective mesh layer, a corrosion-resistant layer, and a wear-resistant layer, arranged sequentially from the inside out. The protective mesh layer prevents the wire rope strands from expanding and loosening, the corrosion-resistant layer effectively resists erosion from environmental factors such as acids, alkalis, and salt spray, and the wear-resistant layer provides excellent wear resistance during drum winding and pulley friction, ensuring a long service life for the wire rope even in complex environments. Therefore, this large crane wire rope improves the reliability of wire ropes under high loads, frequent bending, and complex environments, exhibiting excellent performance and a longer service life. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the high-strength steel wire rope for large cranes described in this utility model; in: 10-Ultra-high molecular weight polyethylene rope core, 20-Flexible layer, 30-Reinforcing steel wire, 40-Inner strand, 50-Outer strand, 60-Fan-shaped synthetic fiber strand, 70-Composite filler strand, 80-Protective net layer, 90-Corrosion resistant layer, 11-Wear resistant layer, 12-Fine steel wire. Detailed Implementation

[0017] The embodiments described below are merely some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0018] See Figure 1 This embodiment provides a high-strength steel wire rope for large cranes, comprising an ultra-high molecular weight polyethylene (UHMWPE) core 10, a flexible layer 20, a predetermined number of reinforcing steel wires 30, a predetermined number of inner strands 40, a predetermined number of outer strands 50, a predetermined number of oil-containing fan-shaped synthetic fiber strands 60, a predetermined number of composite filler strands 70, and a protective layer. The UHMWPE core 10 is surrounded by the flexible layer 20, and the flexible layer 20 is uniformly twisted around the outer side of the inner strands 40, with the outer side of the inner strands 40 in surface contact. The outer layer strand 50 is uniformly twisted, and the protective layer is arranged in a ring around the outer layer strand 50. The reinforcing steel wire 30 fills the gap between the inner layer strand 40 and the flexible layer 20. The composite filler strand 70 fills the gap between the inner layer strand 40 and the outer layer strand 50. The oil-containing fan-shaped synthetic fiber strand 60 fills the gap between the outer layer strand 50 and the protective layer. The protective layer includes a protective mesh layer 80, a corrosion-resistant layer 90 and a wear-resistant layer 11 arranged sequentially from the inside to the outside.

[0019] Preferably, a ring of fine steel wire 12 is arranged inside the ultra-high molecular weight polyethylene rope core 10. The fine steel wire 12 can provide additional support and reinforcement when the rope core is under stress, thereby further improving the overall stability and durability of the wire rope.

[0020] Preferably, the flexible layer 20 is a polyester fiber flexible layer 20, a natural rubber flexible layer 20, a nitrile rubber flexible layer 20, or a thermoplastic polyurethane elastomer flexible layer 20. The flexible layer 20 has good elasticity and cushioning properties, effectively absorbing and dispersing the impact and friction forces generated between the inner and outer steel wire strands during the operation of the wire rope, thereby reducing wear between the steel wires and enabling the wire rope to maintain stable operation under high loads, frequent bending, and complex working conditions, significantly improving the service life and reliability of the wire rope. It also ensures a tighter bond between the inner strand 40 and the ultra-high molecular weight polyethylene rope core 10.

[0021] Preferably, both the inner strand 40 and the outer strand 50 include one central steel wire, ten thin steel wires, five medium-fine steel wires, and ten thick steel wires. The five thin steel wires are twisted around the central steel wire, and the outer layer is staggered with five medium-fine steel wires and five thin steel wires. The ten thick steel wires are symmetrically twisted on the outermost side. The large number of steel wires in the inner strand 40 and the outer strand 50 improves the overall flexibility of the wire rope and also enhances its tensile strength.

[0022] Preferably, the composite filler strand 70 comprises an inner steel wire and three jute yarn bundles and three polyamide bundles interlaced around the outer side of the inner steel wire. The composite filler strand 70 can effectively fill and support the inner strand 40 and the outer strand 50 of the wire rope, and also reduce stress concentration. In this application, the composite filler strand 70 is also impregnated with grease. The jute yarn bundles have good oil absorption properties, which can store and slowly release lubricating oil or rust-preventive oil, thereby continuously lubricating the steel wire strands and reducing friction and wear. The polyamide bundles have both high strength and flexibility, which can provide additional buffering and stress dispersion when the wire rope is under load, improving the compression resistance and fatigue resistance of the wire rope. Therefore, by setting the composite filler strand 70, the wire rope not only maintains structural stability under long-term high-intensity use, but also effectively extends its service life and improves overall safety and reliability.

[0023] Preferably, the fan-shaped synthetic fiber strand 60 is made of aramid fiber, polyester fiber, polypropylene fiber, or polyamide fiber, and is fully impregnated with lubricating oil or rust-preventive oil. This fan-shaped synthetic fiber strand 60 fills the space between the outer strand 50 and the protective layer, continuously releasing lubricating oil or rust-preventive oil during the operation of the wire rope, maintaining low friction between the wire strands, and effectively reducing the risk of wire wear and corrosion. Simultaneously, the fan-shaped fiber strand has a certain degree of elasticity and buffering capacity, which can disperse local stress when the outer strand 50 is under load, reducing peak load concentration and thus lowering the risk of local overload and wire breakage.

[0024] Preferably, the protective net is a mesh sleeve woven from fine steel wires, which is a mesh structure formed by multiple fine steel wires tightly woven together. The protective net layer 80 tightly covers the outer side of the outer strand 50, which can prevent the outer strand 50 from expanding outward, loosening, or locally displacing during use, thereby maintaining the overall structural stability of the wire rope.

[0025] Preferably, the wear-resistant layer 11 is an aluminum oxide wear-resistant layer 11. This wear-resistant layer 11 covers the outer side of the protective net and can provide excellent wear resistance when the wire rope comes into contact with the drum, pulley or other friction surfaces, effectively reducing the wear rate of the wire rope surface and extending the service life of the wire rope.

[0026] Preferably, the corrosion-resistant layer 90 is a phosphated corrosion-resistant layer 90. This corrosion-resistant layer 90 is disposed between the protective net and the wear-resistant layer 11, and can effectively resist the erosion of the wire rope by acids, alkalis, salt spray and other corrosive environments, prevent the surface of the wire strands from rusting and oxidizing, thereby maintaining the mechanical properties and structural integrity of the wire rope.

[0027] Preferably, the inner strand 40 and the outer strand 50 have opposite twist directions. By twisting the inner strand 40 and the outer strand 50 in opposite directions, the torsional moments can be mutually offset when the wire rope is under tension or bending, reducing the tendency for rotation or torsion during operation, thereby improving the overall structural stability and operational safety. Simultaneously, the outer strand 50 is uniformly twisted around the outer side of the inner strand 40 in a surface-contact manner, ensuring a tight fit between the inner strand 40 and the outer strand 50, forming a continuous bearing surface. This allows for uniform stress distribution when the wire rope is under stress, reducing localized stress concentration and friction between the wires, and also preventing loosening.

[0028] Preferably, the reinforcing steel wire 30 is galvanized steel wire. In this application, the inner layer strand 40 comprises 6 strands, the outer layer strand 50 comprises 12 strands, the fan-shaped synthetic fiber strand 60 comprises 12 strands, and the composite filler strand 70 comprises 6 strands.

[0029] This utility model provides a high-strength steel wire rope for large cranes, comprising an ultra-high molecular weight polyethylene (UHMWPE) core 10, a flexible layer 20, a predetermined number of reinforcing steel wires 30, a predetermined number of inner strands 40, a predetermined number of outer strands 50, a predetermined number of oil-containing fan-shaped synthetic fiber strands 60, a predetermined number of composite filler strands 70, and a protective layer. The UHMWPE core 10 itself possesses high strength, impact resistance, and fatigue resistance. Combined with the outer flexible layer 20, it effectively buffers stress concentration between the steel wires, preventing damage to the core due to long-term compression. The reinforcing steel wires 30 placed between the inner strands 40 and the flexible layer 20 enhance the wire rope's resistance to compression and tension under high loads, thereby improving the overall breaking strength. The composite filler strands 70 filling the space between the inner strands 40 and the outer strands 50 not only improve the support and compression resistance between the steel wire strands but also absorb oil, buffer, and disperse stress, further extending the service life of the wire rope. The oil-impregnated fan-shaped synthetic fiber strands 60 filling the space between the outer strand 50 and the protective layer continuously release lubricating oil or rust-preventive oil, maintaining good lubrication of the wire rope strands during long-term operation. This effectively reduces friction, wear, and corrosion risks, decreasing maintenance frequency. Simultaneously, it reduces friction between the outer strands 50 during use and transfers localized stress to the fan-shaped synthetic fiber strands 60 when the outer strands 50 are under stress, reducing peak stress and thus lowering the risk of localized overload. The protective layer employs a composite structure consisting of a protective mesh layer 80, a corrosion-resistant layer 90, and a wear-resistant layer 11, arranged sequentially from the inside out. The protective mesh layer 80 prevents the wire rope strands from expanding and loosening, the corrosion-resistant layer 90 effectively resists corrosion from environmental factors such as acids, alkalis, and salt spray, and the wear-resistant layer 11 provides excellent wear resistance during drum winding and pulley friction, ensuring a long service life for the wire rope even in complex environments. Therefore, this large crane wire rope improves the reliability of wire ropes under high loads, frequent bending, and complex environments, exhibiting excellent performance and a longer service life.

[0030] The above-disclosed embodiments are merely some preferred embodiments of the present utility model, and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model patent application shall still fall within the scope of the present utility model.

Claims

1. A high-strength steel wire rope for large cranes, characterized in that: It comprises an ultra-high molecular weight polyethylene (UHMWPE) rope core, a flexible layer, a predetermined number of reinforcing steel wires, a predetermined number of inner strands, a predetermined number of outer strands, a predetermined number of oil-containing fan-shaped synthetic fiber strands, a predetermined number of composite filler strands, and a protective layer. The UHMWPE rope core is wrapped around the flexible layer, the flexible layer is uniformly twisted around the outer layer, the inner strands are uniformly twisted around the outer layer in a surface-contact manner, and the protective layer is circumferentially arranged around the outer strands. The reinforcing steel wires fill the gap between the inner strands and the flexible layer, the composite filler strands fill the gap between the inner strands and the outer strands, and the oil-containing fan-shaped synthetic fiber strands fill the gap between the outer strands and the protective layer. The protective layer comprises a protective mesh layer, a corrosion-resistant layer, and a wear-resistant layer arranged sequentially from the inside out.

2. The high-strength steel wire rope for large cranes as described in claim 1, characterized in that, The inner ring of the ultra-high molecular weight polyethylene rope core is provided with a thin steel wire.

3. The high-strength steel wire rope for large cranes as described in claim 1, characterized in that, The flexible layer is a polyester fiber flexible layer, a natural rubber flexible layer, a nitrile rubber flexible layer, or a thermoplastic polyurethane elastomer flexible layer.

4. The high-strength steel wire rope for large cranes as described in claim 1, characterized in that, Both the inner and outer strands include one central steel wire, ten fine steel wires, five medium-fine steel wires, and ten coarse steel wires; the five fine steel wires are twisted around the central steel wire, and the outer layer is staggered with five medium-fine steel wires and five fine steel wires, while the ten coarse steel wires are symmetrically twisted around the outermost layer.

5. The high-strength steel wire rope for large cranes as described in claim 1, characterized in that, The composite filler strand comprises an inner steel wire and three jute yarn bundles and three polyamide bundles interlaced and twisted around the outer side of the inner steel wire.

6. The high-strength steel wire rope for large cranes as described in claim 1, characterized in that, The fan-shaped synthetic fiber strands are aramid fiber strands, polyester fiber strands, polypropylene fiber strands, or polyamide fiber strands, and the fan-shaped synthetic fiber strands are fully impregnated with lubricating oil or rust-preventive oil.

7. The high-strength steel wire rope for large cranes as described in claim 1, characterized in that, The protective net is a mesh sleeve woven from fine steel wire.

8. The high-strength steel wire rope for large cranes as described in claim 1, characterized in that, The wear-resistant layer is an aluminum oxide wear-resistant layer.

9. The high-strength steel wire rope for large cranes as described in claim 1, characterized in that, The corrosion-resistant layer is a phosphated corrosion-resistant layer.

10. The high-strength steel wire rope for large cranes as described in claim 1, characterized in that, The inner strands and the outer strands have opposite twist directions.

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