High-performance polymer core steel wire rope

Abstract

The utility model discloses a high-performance polymer core steel wire rope which comprises a central strand, an inner layer strand and an outer layer strand from inside to outside, and is characterized in that the central strand is wrapped and twisted by the inner layer strand to form a central sub-rope; the outer-layer strands wrap and twist the center sub-rope to form a steel wire rope finished product; the central strand consists of an outer-layer rope core formed by twisting a plurality of strands of aramid fiber yarns and an inner-layer rope core formed by twisting a plurality of strands of ultra-high molecular weight polyethylene fiber yarns; the inner-layer strand comprises eight single strands, and each single strand is formed by symmetrically wrapping and twisting a central steel wire with six steel wires; the outer-layer strand comprises eight single strands, and each single strand is formed by wrapping and twisting a center steel wire with six inner-layer thick steel wires, six outer-layer thick steel wires and six outer-layer thin steel wires. The steel wire rope is stable in oil storage performance, high in fatigue bending resistance and high in diameter uniformity, the reelability of the steel wire rope is greatly improved, and then the bearing capacity of the steel wire rope is improved.

Description

Technical Field

[0001] The utility model relates to steel wire rope technology, in particular to a high-performance polymer core steel wire rope. Background Art

[0002] With the popularity of elevators, elevator wire ropes increasingly emphasize service life and comfort. At present, elevator wire ropes are mainly 8×19S-NFC and 8×19S-IWRF structural wire ropes. Among them, 8×19S-NFC has the disadvantages of poor diameter uniformity, uneven support, poor wear resistance, and poor oil storage performance; while 8×19S-IWRF also has the disadvantages of low fatigue resistance and poor oil storage performance.

[0003] As the instruction manual Figure 5 As shown, the 8×19S-NFC steel wire rope structure consists of a sisal core and an outer layer of strands. Due to its low bearing capacity, low fatigue life, and poor diameter uniformity, it is difficult to meet the comfort requirements of elevators, especially the long-life requirements.

[0004] As the instruction manual Figure 6 As shown, this 8×19S-IWRF wire rope structure consists of a sisal core and two outer strands. It is also difficult to meet the comfort requirements of the elevator, especially the long-life requirements, due to its low fatigue life and poor oil storage performance. Summary of the invention

[0005] The purpose of the utility model is to solve the above problems and provide a high-performance polymer core steel wire rope, which has the characteristics of stable oil storage performance, high fatigue bending resistance, high diameter uniformity, good windability, and greatly improved bearing capacity of the steel wire rope.

[0006] The above technical problems of the utility model are mainly solved by the following technical solutions: a high-performance polymer core steel wire rope, which includes a center strand, an inner layer strand and an outer layer strand from the inside to the outside, and is characterized in that: the center strand is twisted by the inner layer strand to form a center sub-rope; the center sub-rope is twisted by the outer layer strand to form a finished steel wire rope.

[0007] The central strand is composed of an outer rope core twisted from multiple strands of aramid fiber filaments and an inner rope core twisted from multiple strands of ultra-high molecular polyethylene fiber filaments; the inner strand includes 8 single strands, each of which is twisted from 6 steel wires symmetrically wrapped around a central steel wire; the outer strand includes 8 single strands, each of which is twisted from 6 inner thick steel wires and 6 outer thick steel wires + 6 outer thin steel wires around a central steel wire.

[0008] In the aforementioned high-performance polymer core steel wire rope, preferably, a central steel wire in the outer layer has the same diameter as the 6 thick steel wires in the inner layer, and the 6 thick steel wires in the outer layer + the 6 thin steel wires in the outer layer are arranged at intervals outside the 6 thick steel wires in the inner layer to form a Warinton twist structure.

[0009] In the aforementioned high-performance polymer core steel wire rope, preferably, the central sub-rope is formed by twisting 8 inner layer strands into a single strand wrapped around a central strand.

[0010] In the aforementioned high-performance polymer core steel wire rope, preferably, each single strand of the inner layer strand is symmetrically twisted around the central strand, and in each cross section, there is only one steel wire tangent to the central strand in each single strand of the inner layer strand.

[0011] In the aforementioned high-performance polymer core steel wire rope, preferably, the 8 single strands of the outer layer are symmetrically twisted in the outermost layer of the steel wire rope, and in each cross section, there is only one thick steel wire in each single strand of the outer layer that is tangent to the steel wire of the inner layer.

[0012] In the aforementioned high-performance polymer core steel wire rope, preferably, the six steel wires of the inner layer strands and the central steel wire are steel wires of equal diameter.

[0013] In the aforementioned high-performance polymer core steel wire rope, preferably, in the central strand, the outer rope core spirally wraps the inner rope core, and the aramid fiber filaments of the outer rope core and the ultra-high molecular polyethylene fiber filaments of the inner rope core are in a tangent relationship.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This technical solution designs the center strand into two parts: an outer rope core twisted from multiple strands of aramid fiber filaments and an inner rope core twisted from multiple strands of ultra-high molecular polyethylene fiber filaments, wherein the outer rope core spirally wraps the inner rope core, and the aramid fiber filaments of the outer rope core and the ultra-high molecular polyethylene fiber filaments of the inner rope core are tangent to each other. Since two types of polymer fibers are used to twist the rope core, which has a double-layer structure, the ultra-high molecular polyethylene fiber filaments of the inner rope core can better store grease, and the aramid fiber filaments of the outer rope core can limit and drain the grease overflowing from the inner rope core, so that the steel wire rope has a good lubrication effect, so that the stored grease can be used with the highest efficiency. Therefore, the steel wire rope of this structure has stable oil storage performance, high fatigue bending resistance, excellent diameter uniformity, greatly improves the windability of the steel wire rope, and thus improves the carrying capacity of the steel wire rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2It is a schematic diagram of a single-strand structure of an outer layer strand of the utility model.

[0018] Figure 3 The utility model is a schematic diagram of a single-strand structure of an inner layer strand.

[0019] Figure 4 It is a schematic diagram of a central strand structure of the utility model.

[0020] Figure 5 , Figure 6 It is a schematic diagram of two steel wire rope structures in the prior art.

[0021] In the figure: 1-outer strand, 101-thick steel wire, 102-thin steel wire, 2-inner strand, 3-center strand, 301-outer rope core, 302-inner rope core. DETAILED DESCRIPTION

[0022] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0023] This embodiment is a high-performance polymer core steel wire rope, such as Figure 1 As shown, from the inside to the outside, it includes three layers: a center strand 3, an inner layer strand 2 and an outer layer strand 1. The inner layer strand 2 is twisted around the center strand 3 to form a center sub-rope; and the outer layer strand 1 is twisted around the center sub-rope to form a finished steel wire rope.

[0024] The outer strand 1 includes 8 single strands, each of which is formed by twisting 6 thick steel wires 101 of the inner layer and 6 thick steel wires of the outer layer + 6 thin steel wires 102 of the outer layer around a central steel wire. Figure 2 As shown, specifically, the central steel wire in the outer layer strand 1 is of equal diameter to the six inner layer thick steel wires 101, that is, the central steel wire is tangent to the six inner layer thick steel wires 101 at the same time, and the six outer layer thick steel wires + the six outer layer thin steel wires 102 are arranged at intervals outside the six inner layer thick steel wires 101, together forming a Warinton twisting structure.

[0025] The inner strand 2 includes 8 strands, which are symmetrically wrapped around the center strand 3, that is, each strand is tangent to the two adjacent strands and the center strand 3 at the same time, so that in each cross section, only one steel wire in each strand of the inner strand 2 is tangent to the center strand. Each strand is twisted by 6 steel wires symmetrically wrapped around the center wire. Figure 3 As shown, the six steel wires and the center steel wire are steel wires of equal diameter.

[0026] The structure of central strand 3 is as follows Figure 4As shown, it is composed of an outer rope core 301 twisted from 8 strands of aramid fiber filaments and an inner rope core 302 twisted from 8 strands of ultra-high molecular polyethylene fiber filaments. The outer rope core 301 spirally wraps the inner rope core 302, so that the inner rope core 302 is completely contained in the space surrounded by the outer rope core 301, and one outer rope core 301 is tangent to only one inner rope core 302, that is, the aramid fiber filaments of the outer rope core 301 and the ultra-high molecular polyethylene fiber filaments of the inner rope core 302 are in a tangent relationship.

[0027] Therefore, the central sub-rope is formed by twisting 8 inner layer strands 2 around one central strand 3; the 8 outer layer strands 1 are symmetrically twisted around the outermost layer of the wire rope, so that in each cross section, there is only one thick steel wire 101 in each strand of the outer layer strand 1 that is tangent to the steel wire of the inner layer strand 2.

[0028] In this embodiment, the inner rope core 302 is obtained by twisting ultra-high molecular polyethylene fiber strips; similarly, the outer rope core 301 is obtained by twisting aramid fiber strips.

[0029] The preparation method of this embodiment is as follows:

[0030] The steel wires are arranged on the stranding machine through the wire distribution plate, and the required structure is produced by pressing the wire pressing steel mold through the closing mouth, and then the stress of the strands is effectively eliminated through the post-deformer, and then collected on the I-shaped wheel. The outer layer strand 1 and the inner layer strand 2 of the Warinton type are prepared.

[0031] When closing the rope, first, 8 inner strands, 2 wraps of twisted center strands, 3 are arranged on the finished car through the distribution plate, passed through the pre-deformer, and then pressed through the closing mouth, and then passed through the post-deformer to effectively eliminate the stress of the strands, and then collected on the I-shaped wheel to form a sub-rope. Then, 8 outer strands, 1 wrap of twisted sub-rope are arranged on the finished car through the distribution plate, passed through the pre-deformer, and pressed through the closing mouth, and then passed through the post-deformer to effectively eliminate the stress of the strands, and finally collected on the I-shaped wheel to form a steel wire rope.

[0032] Since the steel wire rope is made of two polymer fibers twisted into a double-layer structure, the inner core rope 302 ultra-high molecular polyethylene fiber can better store grease, and the outer core rope 301 aramid fiber can limit and drain the grease overflowing from the inner core rope 302, so that the steel wire rope has a good lubrication effect and the stored grease can be used with the highest efficiency.

[0033] After testing, compared with the 8×19S-NFC steel wire rope used, the fatigue performance of the structural steel wire rope in this embodiment is 600,000 times without broken wire, which is 6.6% higher, and the diameter range requirement is +1% to +2%, which is reduced by 4 percentage points. Compared with the 8×19S-IWRF steel wire rope used, the fatigue performance of the structural steel wire rope in this embodiment is 600,000 times without broken wire, which is 13.3% higher, and the diameter range requirement is +1% to +2%, which is reduced by 1 percentage point, and the breaking tensile force is 36.5KN, which is 4% higher.

[0034] The above embodiments are illustrations of the present invention, not limitations of the present invention. Without departing from the principles of the present technical solution, any equivalent changes or equivalent modifications made in accordance with the technical ideas proposed by the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A high-performance polymer core steel wire rope, comprising, from inside to outside, a center strand (3), an inner layer strand (2) and an outer layer strand (1), characterized in that: The inner strands are twisted around the center strands to form a center sub-rope; the outer strands are twisted around the center sub-rope to form a finished steel wire rope; The central strand is composed of an outer rope core (301) twisted from multiple strands of aramid fiber yarns and an inner rope core (302) twisted from multiple strands of ultra-high molecular polyethylene fiber yarns; the inner strand includes 8 single strands, each of which is twisted from 6 steel wires symmetrically wrapped around a central steel wire; the outer strand includes 8 single strands, each of which is twisted from 6 inner thick steel wires (101) and 6 outer thick steel wires + 6 outer thin steel wires (102) wrapped around a central steel wire.

2. A high performance polymer core steel wire rope according to claim 1, characterized in that: A central steel wire in the outer layer strand (1) has the same diameter as the six inner layer thick steel wires (101), and the six outer layer thick steel wires + the six outer layer thin steel wires (102) are arranged at intervals outside the six inner layer thick steel wires to form a Warinton twisting structure.

3. A high performance polymer core steel wire rope according to claim 1, characterized in that: The central sub-rope is formed by twisting eight inner layer strands (2) together with a central strand (3).

4. A high performance polymer core steel wire rope according to claim 1, characterized in that: Each single strand of the inner layer strand (2) is symmetrically twisted around the central strand (3), and in each cross section, there is only one steel wire in each single strand of the inner layer strand that is tangent to the central strand.

5. The high performance polymer core steel wire rope according to claim 1, characterized in that: The eight single strands of the outer strand (1) are symmetrically twisted on the outermost layer of the steel wire rope, and in each cross section, there is only one thick steel wire (101) in each single strand of the outer strand that is tangent to the steel wire of the inner strand (2).

6. A high performance polymer core steel wire rope according to claim 1 or 5, characterized in that: The six steel wires and the central steel wire of the inner layer strand (2) are steel wires of equal diameter.

7. A high performance polymer core steel wire rope according to claim 1, 3 or 4, characterized in that: In the central strand (3), the outer rope core (301) spirally wraps the inner rope core (302), and the aramid fiber filaments of the outer rope core and the ultra-high molecular polyethylene fiber filaments of the inner rope core are in a tangent relationship.

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