A soft, smooth and long-life elevator steel wire rope

Abstract

The utility model provides soft and stable long -life elevator steel wire rope, contain center composite fiber strand, inner winding band layer, inner layer composite strand, outer layer strand, fiber strand, outer winding band layer, flexible layer and wear -resisting layer. Center composite fiber strand passes through setting up ultra high molecular weight polyethylene fiber layer, outer layer steel wire and synthetic fiber layer in proper order, makes steel wire rope have flexibility and buffer performance while guaranteeing strength, reduces bending fatigue, inner winding band layer fastens center composite fiber strand, promotes twist and combines stability, inner layer composite strand has bearing and buffer effect simultaneously, strengthens flexibility and absorbs friction vibration, outer layer strand provides higher tension, and outer winding band layer restrains extrusion between strands and forms transition layer, fiber strand fills the clearance between outer layer strand, plays the role of buffer, lubrication and noise reduction, flexible layer and wear -resisting layer promote adaptability, damping and wear -resisting life. Therefore, this steel wire rope has the advantages of high bearing capacity, good softness, stable operation, low noise and long life etc.

Description

Technical Field

[0001] This utility model relates to the field of wire rope technology, specifically to a soft, stable, and long-life elevator wire rope. Background Technology

[0002] As a key load-bearing and transmission component in elevator systems, the performance of elevator wire ropes directly affects the smoothness, safety, and service life of elevator operation. Currently, common elevator wire ropes are typically made of twisted steel strands, which, while meeting basic load-bearing requirements, still present certain problems during long-term operation.

[0003] Firstly, traditional steel wire ropes are primarily composed of metal strands, lacking flexibility. When passing over traction sheaves or guide sheaves, they are prone to bending fatigue, leading to wire breakage and shortened lifespan, making them unsuitable for the demands of modern high-frequency, high-load elevators. Simultaneously, when the steel strands are compressed or rubbed against each other during operation, wear is accelerated, resulting in a decline in the overall performance of the wire rope and generating noise. Therefore, improving the flexibility, smooth operation, quiet operation, and wear resistance of elevator wire ropes while maintaining their load-bearing strength is a problem that the field is continuously working to address. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a flexible, stable, and long-life elevator wire rope, solving the problem of how to further improve the flexibility, stability, quietness, and wear resistance of some traditional wire ropes while maintaining load-bearing strength.

[0005] A flexible, stable, and long-life elevator wire rope comprises a central composite fiber strand, an inner wrapping layer, a predetermined number of inner composite strands, a predetermined number of outer strands, a predetermined number of fiber strands, an outer wrapping layer, a flexible layer, and a wear-resistant layer. The central composite fiber strand includes a central steel wire, an ultra-high molecular weight polyethylene fiber layer wrapped around the central steel wire, an outer steel wire annularly disposed outside the ultra-high molecular weight polyethylene fiber layer, and an outer synthetic fiber layer wrapped around the outer steel wire. The outer synthetic fiber layer is wrapped around the inner wrapping layer. The inner composite strands are annularly disposed outside the inner wrapping layer. The outer strands are annularly disposed outside the inner composite strands. The outer strands are arranged sequentially from the inside to the outside, including the outer wrapping layer, the flexible layer, and the wear-resistant layer. The fiber strands fill the gaps between adjacent outer strands and the outer wrapping layer.

[0006] Preferably, the inner composite strand comprises a polyester fiber core, a predetermined number of inner steel wires, a predetermined number of inner fiber bundles, and a predetermined number of outer steel wires. The inner steel wires and the inner fiber bundles are interlaced around the outer side of the polyester fiber core, and the outer steel wires are symmetrically twisted on the outermost side.

[0007] Preferably, the outer strand includes one outer strand center wire, 10 fine wires, 5 medium-fine wires and 10 coarse wires; the 5 fine wires are twisted around the outer strand center wire, and the outer layer is staggered with 5 medium-fine wires and 5 fine wires, and the 10 coarse wires are symmetrically twisted around the outermost side.

[0008] Preferably, the inner wrapping layer is a polyester film inner wrapping layer, an aramid fiber inner wrapping layer, or a modified epoxy resin inner wrapping layer.

[0009] Preferably, the fiber strands are polyester fiber strands, polypropylene fiber strands, or aramid fiber strands.

[0010] Preferably, the outer wrapping layer is a polyester film outer wrapping layer, a polypropylene film outer wrapping layer, or an aramid fiber outer wrapping layer.

[0011] Preferably, the flexible layer is a polyurethane elastomer flexible layer or a rubber flexible layer.

[0012] Preferably, the wear-resistant layer is a polyurethane wear-resistant layer, a silicon carbide wear-resistant layer, or an aluminum oxide wear-resistant layer.

[0013] Preferably, the fiber strands are fully impregnated with grease.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This utility model provides a flexible, stable, and long-life elevator wire rope, comprising a central composite fiber strand, an inner wrapping layer, a predetermined number of inner composite strands, a predetermined number of outer strands, a predetermined number of fiber strands, an outer wrapping layer, a flexible layer, and a wear-resistant layer. The central composite fiber strand, by sequentially setting an ultra-high molecular weight polyethylene fiber layer, an outer steel wire, and an outer synthetic fiber layer on the outside of the central steel wire, enables the wire rope to possess excellent flexibility and buffering performance while ensuring load-bearing strength, thereby effectively reducing the impact of bending fatigue on the life of the steel wire, and also making its bonding with the inner composite strand tighter. The inner wrapping layer tightly binds the central composite fiber strand, preventing the internal core from loosening or shifting during operation, ensuring the stability of the twist and the uniformity of stress. The inner composite strand plays a dual role of load bearing and buffering, further enhancing the flexibility of the wire rope, and can also absorb some friction and vibration, giving the wire rope an overall balance of softness and high strength. The outer strands provide the wire rope with stronger tensile strength; the outer wrapping layer confines the inner strands, reducing inter-strand compression and forming a stable transition layer between the flexible layer and the outer strands, improving overall structural coordination; the fiber strands fill the gap between the outer strands and the outer wrapping layer, acting as buffers, lubricants, and noise reducers, contributing to improved elevator smoothness and quietness; the outermost flexible layer and wear-resistant layer, arranged sequentially, give the wire rope better adaptability and vibration damping during repeated contact with the traction sheave, reducing operating noise. Simultaneously, the wear-resistant layer significantly improves surface wear life, effectively extending the overall service life of the wire rope and reducing maintenance and replacement frequency. Therefore, this flexible, stable, and long-life elevator wire rope possesses comprehensive performance advantages such as high load-bearing capacity, good flexibility, smooth operation, low noise, and long wear life, significantly improving comfort while ensuring elevator operational safety. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the soft, stable, and long-life elevator wire rope described in this utility model. in: 10 - Central composite fiber strand, 20 - Inner wrapping layer, 30 - Inner composite strand, 40 - Outer strand, 50 - Fiber strand, 60 - Outer wrapping layer, 70 - Flexible layer, 80 - Wear-resistant layer. Detailed Implementation

[0016] 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.

[0017] See Figure 1This embodiment provides a flexible, stable, and long-life elevator wire rope, comprising a central composite fiber strand 10, an inner wrapping layer 20, a predetermined number of inner composite strands 30, a predetermined number of outer strands 40, a predetermined number of fiber strands 50, an outer wrapping layer 60, a flexible layer 70, and a wear-resistant layer 80. The central composite fiber strand 10 includes a central steel wire, an ultra-high molecular weight polyethylene fiber layer wrapped around the central steel wire, an outer steel wire annularly arranged around the ultra-high molecular weight polyethylene fiber layer, and a wrapping layer... An outer synthetic fiber layer is wound around the outer side of the outer steel wire. An inner wrapping layer 20 is wrapped around the outer side of the outer synthetic fiber layer. An inner composite strand 30 is circumferentially arranged around the outer side of the inner wrapping layer 20. An outer strand 40 is circumferentially arranged around the outer side of the inner composite strand 30. An outer wrapping layer 60, a flexible layer 70, and a wear-resistant layer 80 are arranged sequentially from the inside to the outside of the outer strand 40. Fiber strands 50 fill the gaps between adjacent outer strands 40 and outer wrapping layers 60.

[0018] Preferably, the inner composite strand 30 comprises a polyester fiber core, a predetermined number of inner steel wires, a predetermined number of inner fiber bundles, and a predetermined number of inner steel wires. The inner steel wires and inner fiber bundles are interlaced around the outer side of the polyester fiber core, and the outer steel wires are symmetrically twisted on the outermost side. Through the combination of the polyester fiber core with the inner steel wires, the inner composite strand 30 provides load-bearing capacity while possessing excellent flexibility and cushioning performance. This effectively disperses the impact force and bending stress generated during elevator operation, reduces fatigue damage inside the steel wires, and improves the tightness and stability of the twist, thereby ensuring the overall smoothness and long service life of the wire rope. It should be noted that the inner fiber bundles are hemp rope fiber bundles, and the inner fiber bundles are fully impregnated with grease, which can provide grease to the wire rope and reduce friction loss within the strands.

[0019] Preferably, the outer strand 40 includes one outer strand center wire, ten thin wires, five medium-fine wires, and ten thick wires; the five thin wires are twisted around the outer strand center wire, and the outer layer is staggered with five medium-fine wires and five thin wires, while the ten thick wires are symmetrically twisted on the outermost side. This combination of various wires not only improves the tightness and flexibility of the outer strand 40 but also effectively disperses stress, reducing the risk of wire breakage due to concentrated stress on a single wire, while also providing strong tensile strength.

[0020] Preferably, the inner wrapping layer 20 is a polyester film inner wrapping layer 20, an aramid fiber inner wrapping layer 20, or a modified epoxy resin inner wrapping layer 20. In this embodiment, more preferably, the inner wrapping layer 20 is a modified epoxy resin inner wrapping layer 20. Modified epoxy resin has excellent adhesion and fatigue resistance, which can tightly bind the central composite fiber strand 10 while further enhancing the overall structural stability and shear resistance, preventing the core strand from loosening or slipping during operation. In addition, modified epoxy resin also has good heat resistance and chemical corrosion resistance, which can better protect the central composite fiber strand 10.

[0021] Preferably, the fiber strand 50 is a polyester fiber strand 50, a polypropylene fiber strand 50, or an aramid fiber strand 50. More preferably, the fiber strand 50 is an aramid fiber strand 50. Aramid fibers have extremely high strength and excellent heat resistance, and are not prone to breakage or aging during long-term operation. This significantly improves the stability of the wire rope under high-frequency bending and friction conditions, and also helps reduce inter-strand friction between the outer strands 40. At the same time, aramid fibers are lightweight and have low elongation, which can effectively reduce the overall weight of the wire rope and maintain deformation stability, thereby improving the smoothness and safety of elevator operation.

[0022] Preferably, the outer wrapping layer 60 is a polyester film outer wrapping layer 60, a polypropylene film outer wrapping layer 60, an aramid fiber outer wrapping layer 60, or a steel wire rope mesh outer wrapping layer 60. More preferably, the outer wrapping layer 60 is a polyester film outer wrapping layer 60. Polyester film has excellent toughness and wear resistance, and can form a dense wrapping layer around the outer strands 40, thereby effectively restraining the relative displacement between the strands and reducing wear and noise caused by compression friction. At the same time, polyester film is lightweight and has good fatigue resistance, which can enhance the overall structural stability while ensuring the flexibility of the steel wire rope and extend the service life of the steel wire rope.

[0023] Preferably, the flexible layer 70 is a polyurethane elastomer flexible layer 70 or a rubber flexible layer 70. More preferably, the flexible layer 70 is a rubber flexible layer 70, which has excellent elastic recovery and fatigue resistance. During the repeated winding of the elevator wire rope around the traction sheave, it can effectively absorb impact and vibration, improve operational stability, and reduce operating noise. Simultaneously, it can maintain flexibility and integrity during long-term use, thereby further extending the overall service life of the wire rope.

[0024] Preferably, the wear-resistant layer 80 is a polyurethane wear-resistant layer 80, a silicon carbide wear-resistant layer 80, or an aluminum oxide wear-resistant layer 80. More preferably, the wear-resistant layer 80 is a polyurethane wear-resistant layer 80; the polyurethane wear-resistant layer 80 has excellent elasticity and wear resistance, which can effectively disperse friction during the contact between the wire rope and the traction sheave or guide sheave, reduce surface wear, absorb some vibration, reduce operating noise, maintain the flexibility and stability of the wire rope, and thus significantly extend the overall service life.

[0025] Preferably, the fiber strands 50 are fully impregnated with grease. The grease forms a lubricating film between the fiber strands 50 and the strands themselves, reducing friction and wear, lowering operating noise, and improving the fatigue resistance and flexibility stability of the wire rope during long-term use. Simultaneously, the grease also provides moisture-proof and corrosion-proof protection for the fiber strands 50, further extending the overall service life of the wire rope.

[0026] Preferably, the outer synthetic fiber layer is an aramid fiber layer, a polyester fiber layer, or a polypropylene fiber layer. More preferably, the outer synthetic fiber layer is an aramid fiber layer. Aramid fibers have extremely high tensile strength, excellent fatigue resistance, and low elongation. Under conditions of repeated bending and alternating loads on elevator wire ropes, they can effectively suppress loosening and breakage of the outer steel wires due to bending stress, thereby improving the overall service life. Simultaneously, aramid fibers exhibit significant heat resistance and chemical corrosion resistance, maintaining stable performance in long-term operating environments and avoiding performance degradation caused by high temperatures, humidity, or chemical media. Furthermore, the lightweight nature of the aramid fiber layer reduces the overall weight of the central composite fiber strand 10, allowing the wire rope to further improve flexibility and operational stability while meeting load-bearing requirements, reducing impact and noise with the traction sheave, thereby enhancing the comfort and safety of elevator operation.

[0027] This utility model provides a flexible, stable, and long-life elevator wire rope. The central composite fiber strand 10, by sequentially layering an ultra-high molecular weight polyethylene fiber layer, an outer steel wire, and an outer synthetic fiber layer on the outside of the central steel wire, ensures the wire rope possesses excellent flexibility and cushioning performance while maintaining load-bearing strength. This effectively reduces the impact of bending fatigue on the lifespan of the steel wire and also makes its bond with the inner composite strand 30 tighter. The inner wrapping layer 20 tightly binds the central composite fiber strand 10, preventing the internal core from loosening or shifting during operation, ensuring the stability of the twist and the uniformity of stress. The inner composite strand 30 plays a dual role in load bearing and cushioning, further enhancing the flexibility of the wire rope and absorbing some friction and vibration, making the overall wire rope both flexible and high-strength. The outer strand 40 provides stronger tensile strength to the wire rope, while the outer wrapping layer 60 confines the internal strands, reducing inter-strand compression and forming a stable transition layer between the flexible layer 70 and the outer strand 40, thus improving overall structural coordination. The fiber strand 50 fills the gap between the outer strand 40 and the outer wrapping layer 60, acting as a buffer, lubricant, and noise reducer, contributing to improved elevator smoothness and quietness. The outermost flexible layer 70 and wear-resistant layer 80, arranged sequentially, provide better adaptability and vibration damping during repeated contact with the traction sheave, reducing operating noise. Simultaneously, the wear-resistant layer 80 significantly improves surface wear life, effectively extending the overall service life of the wire rope and reducing maintenance and replacement frequency. Therefore, this flexible, stable, and long-life elevator wire rope possesses comprehensive performance advantages such as high load-bearing capacity, good flexibility, smooth operation, low noise, and long wear life, significantly improving comfort while ensuring elevator operational safety.

[0028] 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 flexible, stable, and long-life steel wire rope for elevators, characterized in that: The material comprises a central composite fiber strand, an inner wrapping layer, a predetermined number of inner composite strands, a predetermined number of outer strands, a predetermined number of fiber strands, an outer wrapping layer, a flexible layer, and a wear-resistant layer. The central composite fiber strand includes a central steel wire, an ultra-high molecular weight polyethylene fiber layer wrapped around the central steel wire, an outer steel wire annularly disposed outside the ultra-high molecular weight polyethylene fiber layer, and an outer synthetic fiber layer wrapped around the outer steel wire. The outer synthetic fiber layer is wrapped around the inner wrapping layer. The inner composite strands are annularly disposed outside the inner wrapping layer. The outer strands are annularly disposed outside the inner composite strands. The outer wrapping layer, the flexible layer, and the wear-resistant layer are sequentially disposed from the inside to the outside of the outer strands. The fiber strands fill the gaps between adjacent outer strands and the outer wrapping layer.

2. The flexible, stable, and long-life elevator wire rope as described in claim 1, characterized in that, The inner composite strand comprises a polyester fiber core, a predetermined number of inner steel wires, a predetermined number of inner fiber bundles, and a predetermined number of outer steel wires. The inner steel wires and inner fiber bundles are interlaced around the outer side of the polyester fiber core, and the outer steel wires are symmetrically twisted on the outermost side.

3. The flexible, stable, and long-life elevator wire rope according to claim 1, characterized in that, The outer strand includes one outer strand center wire, 10 fine wires, 5 medium-fine wires and 10 coarse wires; the 5 fine wires are twisted around the outer strand center wire, and the outer layer is staggered with 5 medium-fine wires and 5 fine wires, and the 10 coarse wires are symmetrically twisted around the outermost side.

4. The flexible, stable, and long-life elevator wire rope as described in claim 1, characterized in that, The inner wrapping layer is a polyester film inner wrapping layer, an aramid fiber inner wrapping layer, or a modified epoxy resin inner wrapping layer.

5. The flexible, stable, and long-life elevator wire rope as described in claim 1, characterized in that, The fiber strands are polyester fiber strands, polypropylene fiber strands, or aramid fiber strands.

6. The flexible, stable, and long-life elevator wire rope as described in claim 1, characterized in that, The outer wrapping layer is a polyester film outer wrapping layer, a polypropylene film outer wrapping layer, or an aramid fiber outer wrapping layer.

7. The flexible, stable, and long-life elevator wire rope as described in claim 1, characterized in that, The flexible layer is a polyurethane elastomer flexible layer or a rubber flexible layer.

8. The flexible, stable, and long-life elevator wire rope as described in claim 1, characterized in that, The wear-resistant layer is a polyurethane wear-resistant layer, a silicon carbide wear-resistant layer, or an aluminum oxide wear-resistant layer.

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