Lightweight and quiet steel wire rope for elevator

Abstract

The utility model provides a kind of light-weight mute elevator steel wire rope, by adopting composite fiber rope core and composite fiber strand core instead of steel core, to significantly reduce the overall weight of the steel wire rope made, so that steel wire rope light-weight;Meanwhile, through the setting of first carbon fiber layer and carbon fiber silk, and the thick steel wire that constitutes inner layer strand and outer layer strand is all plated with nickel-polytetrafluoroethylene, can reduce the friction between inner layer strand, outer layer strand, between adjacent thick steel wire, to reduce the generation of friction noise when using steel wire rope, improve the mute effect of elevator steel wire rope.Last, sound-absorbing layer uses the combination use of polyurethane fiber layer and polyacrylonitrile nanofiber layer with good sound-absorbing effect, significantly improve the sound-absorbing performance of sound-absorbing layer, so that the mute effect of steel wire rope is further improved, reduce the noise when using steel wire rope.

Description

Technical Field

[0001] This utility model relates to the field of steel wire rope manufacturing technology, and in particular to a lightweight and quiet steel wire rope for elevators. Background Technology

[0002] As the core equipment for vertical transportation in modern buildings, elevator systems, and elevator wire ropes are one of the most important components of elevator systems. They not only have to bear the dynamic weight of the car and the load, but also have to resist complex tensile stress and bending fatigue during repeated lifting and lowering, playing an irreplaceable role in ensuring operational safety.

[0003] However, while traditional elevator wire ropes meet basic mechanical performance requirements, they often have two major problems: First, the mechanical vibration of the external traction system during operation and the slight displacement between the internal wires will generate superimposed noise; second, the large self-weight of the wire rope increases the load and energy consumption of the traction system, exacerbates vibration and noise during operation, and with the increase of service life, the inertial vibration caused by the self-weight of the wire rope and the friction of the rope groove will further aggravate the noise diffusion, thereby affecting the passenger riding experience, reducing the comfort requirements of elevator riding and being detrimental to creating a good living and working environment.

[0004] Secondly, traditional steel wire ropes are significantly less lightweight. Especially in high-frequency use scenarios, the friction and displacement between the steel wires inside the rope, as well as the compression between the rope and the groove, will generate harsh mechanical noise, which not only affects the passenger's riding experience, but also disturbs the tranquility of the living and working environment.

[0005] Therefore, it is necessary to manufacture a lightweight elevator wire rope that can effectively absorb and isolate noise generated inside and outside the elevator wire rope during use. Utility Model Content

[0006] In view of the technical problems of insufficient lightweight elevator wire ropes in the existing technology and the need for noise isolation or absorption, this utility model proposes a lightweight and quiet elevator wire rope.

[0007] A lightweight and quiet elevator wire rope includes a composite fiber core and an inner and outer strand layer sequentially wrapped around the composite fiber core. The composite fiber core includes an aramid fiber strand and several interwoven sisal and polyester fiber strands uniformly twisted around the aramid fiber strand. A steel wire mesh reinforcement layer is wrapped around the outside of the composite fiber core, and a first carbon fiber layer is wrapped around the steel wire mesh reinforcement layer. The inner strand layer includes several strands in line contact. The inner strands of the composite fiber rope core are spirally twisted around its outer periphery; the outer strands consist of several outer strands spirally twisted around the outer periphery of the inner strands in a face-contact manner; both the inner and outer strands include a composite fiber core and coarse steel wires spirally twisted around the outer periphery of the composite fiber core, and the coarse steel wires are all coated with a nickel-PTFE composite coating; several carbon fiber filaments are filled between the inner and outer strands; a sound-absorbing layer is provided on the outer periphery of the outer strands, and a sheath is wrapped around the outer periphery of the sound-absorbing layer. The sound-absorbing layer includes a polyurethane fiber layer and a polyacrylonitrile nanofiber layer sequentially disposed on the outer periphery of the outer strands.

[0008] Furthermore, a thin steel wire is filled between the outer peripheries of the adjacent polyester fiber strands and sisal fiber strands.

[0009] Furthermore, the composite fiber core is composed of several ultra-high molecular weight polyethylene fibers and several high molecular weight polyethylene fibers interwoven together.

[0010] Furthermore, the cross-sectional diameter of the aramid fiber strand is 2-4 times that of the sisal fiber strand, and the cross-sectional diameter of the sisal fiber strand is equal to that of the polyester fiber strand.

[0011] Furthermore, each of the adjacent outer strands is filled with a polyurethane buffer block, and the polyurethane buffer block has several honeycomb holes inside.

[0012] Furthermore, the polyurethane fiber layer is formed by stacking and fixing several polyurethane fiber membranes; the polyacrylonitrile nanofiber layer is formed by stacking and fixing several polyacrylonitrile nanofiber membranes.

[0013] Furthermore, the sheath is a polyvinyl chloride sheath.

[0014] Furthermore, a water-proof layer is provided between the sheath and the sound-absorbing layer. The water-proof layer includes n layers of water-blocking yarn, where n is greater than 2 and n is a positive integer, and a second carbon fiber layer is provided between two adjacent layers of water-blocking yarn.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a lightweight and quiet elevator wire rope. By using a composite fiber rope core and composite fiber strand core instead of a steel core, the overall weight of the manufactured wire rope is significantly reduced, making the wire rope lighter. Simultaneously, the inclusion of a first carbon fiber layer and carbon fiber filaments, along with the nickel-plated polytetrafluoroethylene coating on the coarse steel wires constituting the inner and outer strands, reduces friction between the inner and outer strands and between adjacent coarse steel wires, thereby reducing frictional noise during use and improving the quietness of the elevator wire rope. Finally, the sound-absorbing layer combines a polyurethane fiber layer and a polyacrylonitrile nanofiber layer, significantly improving the sound absorption performance of the sound-absorbing layer, further enhancing the quietness of the wire rope and reducing noise during use. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a lightweight and quiet elevator wire rope provided by this utility model; Figure 2 A simplified schematic diagram of the internal structure of the composite fiber rope core provided by this utility model.

[0017] Attached Figure Labels

[0018] Composite fiber rope core; 101, aramid fiber strands; 102, sisal fiber strands; 103, polyester fiber strands; 2, inner strand layer; 21, inner strand; 3, outer strand layer; 31, outer strand; 4, steel wire mesh reinforcement layer; 5, first carbon fiber layer; 6, fine steel wire; 7, carbon fiber filament; 8, sound-absorbing layer; 81, polyurethane fiber layer; 82, polyacrylonitrile nanofiber layer; 9, sheath; 10, polyurethane buffer block; 11, waterproof layer. Detailed Implementation

[0019] To provide a more detailed description of this utility model, the following description is provided in conjunction with the accompanying drawings. It should be noted that the embodiments described below are merely some, not all, of the embodiments of this utility model. 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.

[0020] refer to Figure 1 and Figure 2 As shown, a lightweight and quiet elevator wire rope includes a composite fiber rope core 1 and an inner strand layer 2 and an outer strand layer 3 sequentially wrapped around the composite fiber rope core 1.

[0021] Specifically, the composite fiber rope core 1 includes an aramid fiber strand 101 and several interwoven sisal fiber strands 102 and polyester fiber strands 103 uniformly twisted around the outside of the aramid fiber strand 101.

[0022] The high tensile strength of the aramid fiber strands 101 ensures the core load-bearing capacity of the composite fiber rope core 1 and guarantees the stability of the rope core under dynamic loads. The sisal fiber strands 102 possess high strength and wear resistance at a lower cost, while the polyester fiber strands 103 enhance the rope core's corrosion resistance and elastic recovery. By interlacing the sisal fiber strands 102 and polyester fiber strands 103 on the outside of the aramid fiber strands 101, the structure of the resulting composite fiber rope core 1 promotes stress dispersion, reduces local fatigue, and extends the rope core's service life. Furthermore, the use of multiple composite fibers helps balance the rope core's high performance and economy, improving the cost-effectiveness of rope core manufacturing. In addition, the sisal fiber strands 102 effectively absorb and store the lubricating grease required by the wire rope, significantly improving the durability of the rope core 1.

[0023] A composite fiber rope core 1 is made by combining three types of fibers: aramid fiber strand 101, sisal fiber strand 102, and polyester fiber strand 103, to replace the steel core. This can significantly reduce the overall weight of the rope core, thereby making the steel wire rope lighter, while also ensuring the strength and durability of the rope core and maintaining its load-bearing capacity.

[0024] In this embodiment, the cross-sectional diameter of the aramid fiber strand 101 is 2-4 times that of the sisal fiber strand 102, and the cross-sectional diameter of the sisal fiber strand 102 is equal to that of the polyester fiber strand 103.

[0025] Aramid fiber strand 101, as the core strand 101, bears the main load in the composite structure. Its large cross-sectional diameter can give full play to its high tensile strength, providing higher tensile strength and rigidity to the composite fiber rope core 1, ensuring the stability of the composite fiber rope core 1 under dynamic load and resisting the risk of breakage.

[0026] The composite fiber rope core 1 is wrapped with a steel wire mesh reinforcement layer 4, and the steel wire mesh reinforcement layer 4 is wrapped with a first carbon fiber layer 5.

[0027] The steel wire mesh reinforcing layer 4 provides external rigid support for the composite fiber rope core 1, resisting impact and shear forces under dynamic loads; at the same time, it effectively disperses local stress concentration and prevents the internal fiber layers from cracking due to excessive stretching or friction. The first carbon fiber layer 5 reduces friction between the steel wire mesh reinforcing layer 4 and the inner strand layer 4, reduces friction noise, and enhances the tensile strength of the composite fiber rope core 1, making it less prone to breakage during stretching, thereby improving the strength of the steel wire rope.

[0028] In some embodiments, a thin steel wire 6 is filled between the outer peripheries of adjacent polyester fiber strands 103 and sisal fiber strands 102.

[0029] The fine steel wire 6 significantly enhances the shear resistance between adjacent fiber strands, preventing slippage or breakage due to friction or vibration. Simultaneously, the rigid filling of the fine steel wire 6 fixes the relative positions of the polyester fiber strands 103 and the sisal fiber strands 102, preventing the braided structure from becoming loose and maintaining the compactness of the rope core.

[0030] The inner layer 2 includes several inner strands 21 that are spirally twisted around the outer periphery of the composite fiber rope core 1 in a line-contact manner.

[0031] The outer layer 3 includes several outer strands 31 that are spirally twisted around the outer periphery of the inner layer 2 in a face-contact manner.

[0032] Both the inner strand 21 and the outer strand 31 include a composite fiber core 211 and a coarse steel wire 212 spirally twisted around the outer periphery of the composite fiber core 211. The coarse steel wire 212 is coated with a nickel-polytetrafluoroethylene composite coating.

[0033] The composite fiber core 211 provides flexibility and tensile strength, reduces the overall rigidity of the wire rope, decreases friction caused by stress concentration, and makes the total weight of the inner strands 21 and outer strands 31 lighter, thus making the overall wire rope lighter. The nickel-PTFE composite coating on the coarse steel wire 212 has a low coefficient of friction, which can reduce the sliding friction noise between the coarse steel wire and adjacent coarse steel wires or outer strands 31, thereby achieving a certain noise reduction effect. At the same time, the nickel-PTFE composite coating gives the coarse steel wire 212 good wear resistance and corrosion resistance, extending its service life.

[0034] The composite fiber core 211 is composed of several ultra-high molecular weight polyethylene fibers and several high molecular weight polyethylene fibers interwoven together.

[0035] Ultra-high molecular weight polyethylene (UHMWPE) fibers possess extremely high strength and modulus, complementing the advantages of lower-strength but higher-elasticity and flexibility high-molecular-weight polyethylene (HMWPE) fibers. This enhances the tensile strength and elastic modulus of the overall composite fiber core 211, while also giving it excellent wear resistance and corrosion resistance. Furthermore, the low density of polyethylene fibers allows the composite fiber core 211 to maintain high strength while significantly reducing its overall weight, resulting in a substantial weight reduction compared to a steel core.

[0036] A plurality of carbon fiber filaments 7 are filled between the inner strand layer 2 and the outer strand layer 3. The carbon fiber filaments 7 can enhance the density of the wire rope, reduce the risk of loosening of the internal steel wires, and avoid additional friction and deformation noise caused by loose structure. At the same time, it can reduce the friction between the inner strand layer 2 and the outer strand layer 3, and reduce the generation of friction noise.

[0037] The outer layer 3 has a sound-absorbing layer 8 on its outer periphery. The sound-absorbing layer 5 includes a polyurethane fiber layer 81 and a polyacrylonitrile nanofiber layer 82 sequentially disposed on the outer periphery of the outer layer 8.

[0038] The polyurethane fiber layer 81 can serve as a porous sound-absorbing material. Its open-pore structure can dissipate mid-to-high frequency sound energy through air vibration and friction caused by sound wave incidentness, resulting in a high noise reduction coefficient. It can absorb mid-to-high frequency noise generated internally and externally during the use of steel wire ropes. The polyacrylonitrile nanofiber layer 82 can form ultra-fine pores, significantly increasing the contact area and friction frequency between sound waves and fibers, resulting in outstanding absorption effects on mid-to-low frequency noise, such as elevator vibration and mechanical equipment noise.

[0039] The combined use of polyurethane fiber layer 81 and polyacrylonitrile nanofiber layer 82 can improve the sound absorption performance of the sound-absorbing layer, further enhancing the noise reduction effect of the steel wire rope and reducing the noise during its use.

[0040] In addition, the polyurethane fiber layer 81 can provide elastic support for the polyacrylonitrile nanofiber layer 82 and protect the polyacrylonitrile nanofiber layer 82 from mechanical damage.

[0041] The polyurethane fiber layer 81 is formed by stacking and fixing several layers of polyurethane fiber membranes; the polyacrylonitrile nanofiber layer 82 is formed by stacking and fixing several layers of polyacrylonitrile nanofiber membranes. The multi-layered fiber membranes can improve the overall strength and stability of the fiber membrane, prevent deformation and cracking, and at the same time create more complex sound wave propagation paths, thereby improving sound absorption efficiency.

[0042] The sound-absorbing layer 8 is wrapped with a protective sleeve 9 on its outer periphery. In this embodiment, the protective sleeve 9 is a polyvinyl chloride sleeve, which provides physical protection for the internal structure of the wire rope.

[0043] In some embodiments, each adjacent outer strand 31 is filled with a polyurethane buffer block 10, and the polyurethane buffer block 10 has a plurality of honeycomb holes inside. The honeycomb hole structure enables the polyurethane buffer block to form a multi-level buffer system. When the outer strand is impacted, the bending deformation of the honeycomb wall and the compression of air in the pores can effectively absorb and disperse the impact energy, reducing the vibration and impact of the wire rope during operation, thereby extending its service life. At the same time, the honeycomb hole structure absorbs the noise generated inside and outside the wire rope, causing the sound waves to undergo multiple reflections and scatterings during propagation, reducing the propagation efficiency of the sound waves, thereby reducing noise.

[0044] In some embodiments, a water-resistant layer 11 is further provided between the sheath 9 and the sound-absorbing layer 8. The water-resistant layer 11 comprises n layers of water-blocking yarn, where n is greater than 2 and is a positive integer, and a second carbon fiber layer is disposed between adjacent layers of water-blocking yarn. The water-resistant layer 11 can prevent water from entering the interior of the wire rope, which is beneficial to improving the service life of the wire rope. At the same time, the combination of water-blocking yarn layers and carbon fiber cloth layers in the water-resistant layer 11 can improve the tensile strength of the water-resistant layer 11, which also strengthens the wire rope.

[0045] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model and do not limit the utility model to the specific implementations described. Obviously, other modifications and variations can be made based on the content of this specification. The embodiments selected and specifically described in this specification are intended to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. They are not intended to limit the utility model, and any simple modifications to this utility model fall within the protection scope of this utility model.

Claims

1. A lightweight and quiet elevator wire rope, comprising a composite fiber core and inner and outer strands sequentially wrapped around the composite fiber core, characterized in that, The composite fiber rope core includes an aramid fiber strand and several interwoven sisal fiber strands and polyester fiber strands uniformly twisted around the outside of the aramid fiber strand; the composite fiber rope core is wrapped with a steel wire mesh reinforcement layer, and a first carbon fiber layer is wrapped around the steel wire mesh reinforcement layer. The inner strand layer includes several inner strands that are spirally twisted around the outer periphery of the composite fiber rope core in a line-contact manner; the outer strand layer includes several outer strands that are spirally twisted around the outer periphery of the inner strand layer in a surface-contact manner. Both the inner and outer strands include a composite fiber core and a coarse steel wire spirally twisted around the outer periphery of the composite fiber core. The coarse steel wire is coated with a nickel-polytetrafluoroethylene composite coating. A number of carbon fiber filaments are filled between the inner and outer strands. The outer layer has a sound-absorbing layer on its outer periphery, and a protective sleeve is wrapped around the outer periphery of the sound-absorbing layer; The sound-absorbing layer includes a polyurethane fiber layer and a polyacrylonitrile nanofiber layer sequentially disposed on the outer periphery of the outer strand layer.

2. The lightweight and quiet elevator wire rope according to claim 1, characterized in that, A thin steel wire is filled between the outer peripheries of adjacent polyester fiber strands and sisal fiber strands.

3. The lightweight and quiet elevator wire rope according to claim 1, characterized in that, The composite fiber core is composed of several ultra-high molecular weight polyethylene fibers and several high molecular weight polyethylene fibers interwoven together.

4. The lightweight and quiet elevator wire rope according to claim 1, characterized in that, The cross-sectional diameter of the aramid fiber strand is 2-4 times that of the sisal fiber strand, and the cross-sectional diameter of the sisal fiber strand is equal to that of the polyester fiber strand.

5. The lightweight and quiet elevator wire rope according to claim 1, characterized in that, Each of the adjacent outer strands is filled with a polyurethane buffer block, and the polyurethane buffer block has several honeycomb holes inside.

6. The lightweight and quiet elevator wire rope according to claim 1, characterized in that, The polyurethane fiber layer is formed by stacking and fixing several layers of polyurethane fiber membranes; the polyacrylonitrile nanofiber layer is formed by stacking and fixing several layers of polyacrylonitrile nanofiber membranes.

7. The lightweight and quiet elevator wire rope according to claim 1, characterized in that, The sheath is a polyvinyl chloride sheath.

8. The lightweight and quiet elevator wire rope according to claim 1, characterized in that, A water-proof layer is provided between the sheath and the sound-absorbing layer. The water-proof layer includes n layers of water-blocking yarn, where n is greater than 2 and n is a positive integer. A second carbon fiber layer is provided between two adjacent layers of water-blocking yarn.

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