Large-diameter five-layer strand rotation-resistant steel wire rope and manufacturing method thereof
By employing a five-strand structure and a reverse one-time online twisting process, the problems of limited length and unbalanced torsional torque in three-strand wire ropes have been solved, resulting in ultra-long wire ropes with ultra-high breaking strength and high resistance rotation performance, meeting the needs of deep-sea pipelaying and offshore hoisting.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-03-13
AI Technical Summary
Existing three-strand wire ropes have limited length as their diameter increases, and their torsional torque is unbalanced under high loads, resulting in insufficient anti-rotation performance and potential safety hazards.
It adopts a five-layer strand structure, including a central sub-rod, an inner layer rope, a second outer layer rope, and an outer layer rope. Through a reverse one-time online twisting process, combined with an interlaced design and a unified surface contact strand structure, it enhances flexibility and torque balance, and improves rotation resistance performance.
It significantly increases the length and flexibility of the wire rope, improves its anti-rotation performance, and meets the requirements of high-end marine engineering equipment such as deep-sea pipelaying and offshore hoisting for long dimensions, high strength and anti-rotation.
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Figure CN121653983A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of wire rope technology, and particularly relates to a large-diameter five-layer strand resistance rotating wire rope and its manufacturing method. Background Technology
[0002] With the continuous advancement of marine development, high-end marine engineering equipment fields such as deep-sea pipelaying operations, offshore wind power installation, and large-scale marine rescue and salvage are developing rapidly. For such equipment, such as the winches of deep-water pipelaying crane vessels, the giant cranes of self-elevating offshore wind power installation platforms, and the heavy-duty cranes of deep-sea exploration vessels, the steel wire rope, as one of its core components, is developing towards ultra-long, large-diameter, ultra-high breaking strength, and extremely high resistance to rotational rotation performance.
[0003] Currently, most widely used traditional wire ropes are of the 35(W) type with a three-strand structure. However, when the extreme parameter requirements mentioned above need to be met, this traditional structure exposes inherent technical bottlenecks. First, in terms of length, when the diameter of the wire rope increases, if the three-strand structure is maintained, the diameter of each strand must increase accordingly. Under the condition of a fixed twisting equipment capacity, the capacity of the thicker strands becomes significantly shorter, resulting in a strict limitation on the length of the final wire rope, making it impossible to meet the ultra-long requirements. Second, in terms of performance, due to its fewer strands and relatively simple structure, the torsional torque generated by the internal strands is difficult to achieve complete balance in single-rope lifting operations that bear thousands of tons of tension, resulting in limited anti-rotation performance and posing significant operational safety hazards. Summary of the Invention
[0004] The purpose of this invention is to provide a large-diameter five-layer stranded rotating steel wire rope and its manufacturing method to solve the above-mentioned problems.
[0005] To achieve the above objectives, the present invention provides the following solution:
[0006] A large-diameter five-layer stranded rotating steel wire rope includes: a central sub-rope, an inner layer rope, a second outer layer rope, and an outer layer rope arranged sequentially from the inside to the outside.
[0007] The central sub-rope includes a central strand, and a plurality of first-layer strands are equally spaced on the outer periphery of the central strand. A plurality of second-layer small strands and a plurality of second-layer large strands are equally spaced on the outer periphery of the plurality of first-layer strands, and the second-layer small strands and the second-layer large strands are arranged alternately.
[0008] The inner rope includes multiple third-layer strands, which are circumferentially and equally spaced on the outside of multiple second-layer large strands and multiple second-layer small strands;
[0009] The outermost layer rope includes multiple fourth-layer strands, which are circumferentially spaced on the outside of the third-layer strands.
[0010] The outer rope includes multiple fifth-layer strands, which are circumferentially spaced on the outside of the fourth-layer strands.
[0011] The twist directions of the central strand, the first layer strand, the third layer strand, and the fifth layer strand are the same; the twist directions of the second large layer strand, the second small layer strand, and the fourth layer strand are the same; and the twist directions of the first layer strand and the second large layer strand are opposite.
[0012] In the large-diameter five-layer strand resistance rotating steel wire rope of the present invention, the central strand includes a central steel wire, and multiple second steel wires are equally spaced around the outer side of the central steel wire. Multiple third steel wires are equally spaced around the outer side of the multiple second steel wires, and the two adjacent second steel wires and the two adjacent third steel wires are in contact with each other.
[0013] The first layer of shares, the second layer of large shares, the second layer of small shares, the third layer of shares, the fourth layer of shares, and the fifth layer of shares all have the same structure as the central share.
[0014] In the large-diameter five-layer stranded rotating steel wire rope of the present invention, the lay length of the center strand is 7.5 times its own strand diameter, and the lay lengths of the first layer strand, the second layer large strand, the second layer small strand, the third layer strand, the fourth layer strand, and the fifth layer strand are 8.3 times their own strand diameters.
[0015] In the large-diameter five-layer stranded rotating steel wire rope of the present invention, the inner layer rope lay distance is 6.5 times its own rope diameter, the center sub-rope lay distance is 0.685 times the inner layer rope lay distance, the second outer layer rope lay distance is 6.7 times its own rope diameter, and the outer layer rope lay distance is 7 times its own rope diameter.
[0016] A method for manufacturing a large-diameter five-strand resistance rotating steel wire rope, comprising the following steps:
[0017] Step 1, Twisting: Twisting and compacting the finished steel wire according to the design parameters to create the center strand, the first layer strand, the second large strand, the second small strand, the third layer strand, the fourth layer strand, and the fifth layer strand.
[0018] Step 2: Twisting the center sub-rope and inner layer rope: Twist the center strand, first layer strand, second layer large strand, second layer small strand, and third layer strand in reverse in one go online, so that the twisting of the center sub-rope and inner layer rope is completed simultaneously;
[0019] Step 3: Twist the outermost layer of rope: Twist multiple fourth-layer strands to the outer layer of the inner rope;
[0020] Step 4: Twist the outer layer rope: Twist multiple fifth-layer strands to the outer layer of the secondary outer layer rope.
[0021] In the manufacturing method of the large-diameter five-layer strand resistance rotating steel wire rope of the present invention, in step one, the twist direction of the center strand, the first layer strand, the third layer strand and the fifth layer strand is left twist, and the twist direction of the second large layer strand, the second small layer strand and the fourth layer strand is right twist.
[0022] In the manufacturing method of the large-diameter five-layer strand resistance rotating steel wire rope of the present invention, in step one, the strand compression rate is set to 10.5% to 11.8%.
[0023] In the manufacturing method of the large-diameter five-layer strand rotating steel wire rope of the present invention, in step two, the twisting direction of the center sub-rope is left-handed alternating twist, and the twisting direction of the inner layer rope is right-handed alternating twist.
[0024] In the manufacturing method of the large-diameter five-layer stranded rotating steel wire rope of the present invention, in step three, the twisting direction of the second outer layer rope twisting method is left-handed alternating twist.
[0025] In the manufacturing method of the large-diameter five-layer strand rotating steel wire rope of the present invention, in step four, the outer layer rope twisting direction is right-hand interlaced twist.
[0026] Compared with the prior art, the present invention has the following advantages and technical effects:
[0027] This invention employs a five-layer close-packed structure consisting of a central strand, a first layer of strands, a second layer of large / small strands, a third layer of strands, a fourth layer of strands, and a fifth layer of strands. Combined with a reverse one-time online twisting process, under given equipment conditions, the rope capacity is significantly increased by increasing the number of strand layers and reducing the strand diameter, successfully overcoming the manufacturing bottleneck of ultra-long wire ropes. Through the tight arrangement and interlacing design of multiple strands, coupled with a unified surface contact strand structure, ultra-high breaking strength is achieved while enhancing overall flexibility. Furthermore, by using the opposite twisting direction of adjacent strands and a one-time synchronous twisting process, a multi-layer torque balance system is constructed, fundamentally improving the anti-rotation performance of the wire rope. This enables it to meet the comprehensive extreme requirements of high-end marine engineering equipment such as deep-sea pipelaying and offshore hoisting for long dimensions, high strength, anti-rotation, and high durability. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:
[0029] Figure 1 This is a schematic diagram of the structure of the present invention;
[0030] Among them, 1. Central stocks; 2. First-tier stocks; 3. Second-tier large stocks; 4. Second-tier small stocks; 5. Third-tier stocks; 6. Fourth-tier stocks; 7. Fifth-tier stocks. Detailed Implementation
[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0033] Reference Figure 1 The present invention discloses a large-diameter five-layer strand resistance rotating steel wire rope, comprising: a central sub-rope, an inner layer rope, a second outer layer rope and an outer layer rope arranged sequentially from the inside to the outside;
[0034] The central sub-rope includes a central strand 1, and multiple first-layer strands 2 are equally spaced around the outer periphery of the central strand 1. Multiple second-layer small strands 4 and multiple second-layer large strands 3 are equally spaced around the outer periphery of the multiple first-layer strands 2. The second-layer small strands 4 and the second-layer large strands 3 are arranged alternately.
[0035] The inner rope includes multiple third-layer strands 5, which are circumferentially and equally spaced on the outside of multiple second-layer large strands 3 and multiple second-layer small strands 4.
[0036] The outermost layer rope includes multiple fourth-layer strands 6, which are circumferentially and equally spaced on the outside of the third-layer strands 5;
[0037] The outer rope includes multiple fifth-layer strands 7, which are circumferentially spaced on the outside of the fourth-layer strands 6;
[0038] The twist directions of the central strand 1, the first layer strand 2, the third layer strand 5, and the fifth layer strand 7 are the same. The twist directions of the second layer large strand 3, the second layer small strand 4, and the fourth layer strand 6 are the same. The twist directions of the first layer strand 2 and the second layer large strand 3 are opposite.
[0039] In one alternative embodiment, the central strand 1 includes a central steel wire, and multiple second steel wires are arranged at equal intervals around the outer periphery of the central steel wire. Multiple third steel wires are arranged at equal intervals around the outer periphery of the multiple second steel wires, and the two adjacent second steel wires and the two adjacent third steel wires are in contact with each other.
[0040] Specifically, there is one central steel wire, nine second steel wires, and nine third steel wires. Two adjacent second steel wires are in line contact, two adjacent third steel wires are in line contact, and the third steel wire is located at the trough of the adjacent second steel wire and is in line contact with the second steel wire.
[0041] The structure of the first layer stock 2, the second layer large stock 3, the second layer small stock 4, the third layer stock 5, the fourth layer stock 6, and the fifth layer stock 7 is the same as that of the central stock 1.
[0042] In one alternative configuration, the twist pitch of the center strand 1 is 7.5 times its own strand diameter, and the twist pitch of the first layer strand 2, the second layer large strand 3, the second layer small strand 4, the third layer strand 5, the fourth layer strand 6, and the fifth layer strand 7 is 8.3 times its own strand diameter.
[0043] In one alternative configuration, the inner layer twist pitch is 6.5 times its own rope diameter, the center sub-twist pitch is 0.685 times the inner layer twist pitch, the second outer layer twist pitch is 6.7 times its own rope diameter, and the outer layer twist pitch is 7 times its own rope diameter.
[0044] A method for manufacturing a large-diameter five-strand resistance rotating steel wire rope, comprising the following steps:
[0045] Step 1, Twisting: Twisting and compacting the finished steel wire according to the design parameters to produce the center strand 1, the first layer strand 2, the second layer large strand 3, the second layer small strand 4, the third layer strand 5, the fourth layer strand 6, and the fifth layer strand 7.
[0046] Step 2: Twisting the center sub-rope and inner layer rope: Twisting the center strand 1, the first layer strand 2, the second layer large strand 3, the second layer small strand 4, and the third layer strand 5 in reverse in one go online, so that the twisting of the center sub-rope and the inner layer rope is completed simultaneously;
[0047] Step 3, Twisting the outermost layer of rope: Twist the multiple fourth-layer strands (6 bundles) to the outer layer of the inner rope;
[0048] Step 4: Twist the outer layer rope: Twist the multiple fifth layer strands (7 bundles) to the outer layer of the secondary outer layer rope.
[0049] In one alternative scheme, in step one, the twist direction of the center strand 1, the first layer strand 2, the third layer strand 5 and the fifth layer strand 7 is left twist, and the twist direction of the second layer large strand 3, the second layer small strand 4 and the fourth layer strand 6 is right twist.
[0050] In one alternative approach, in step one, the strand compression rate is set to 10.5% to 11.8%.
[0051] In one alternative scheme, in step two, the twisting direction of the center sub-rope is left-handed alternating twist, and the twisting direction of the inner layer rope is right-handed alternating twist.
[0052] In one alternative approach, in step three, the twisting direction of the outermost layer rope twist is left-handed alternating twist.
[0053] In one alternative approach, in step four, the outer layer rope twisting direction is a right-hand alternating twist.
[0054] Specific manufacturing method:
[0055] 1. Wire drawing: The semi-finished steel wire is drawn on a linear wire drawing machine to prevent twisting during the drawing process. Good lubrication and cooling are ensured during drawing, and the surface temperature of the steel wire is strictly controlled below 160℃. Appropriate straightener process parameters are selected to ensure the smooth rotation of each roller in the straightener, effectively guaranteeing the mechanical properties of the finished steel wire, thus producing the required strands of finished steel wire.
[0056] 2. Twisting: The finished steel wires are twisted and compacted online according to the twist direction and twist pitch requirements of each strand structure through a twisting equipment connected in series with a three-piece roll forming fixture and a double roll forming fixture. The strand compression rate is selected to be 10.5% to 11.8%, which produces one central strand 1, six first-layer strands 2, six second-layer large strands 3, six second-layer small strands 4, sixteen third-layer strands 5, twenty fourth-layer strands 6, and twenty-four fifth-layer strands 7.
[0057] 3. Twisting the center sub-rope and inner layer rope: The twisted center strand 1, six first-layer strands 2, six second-layer large strands 3, six second-layer small strands 4, and sixteen third-layer strands 5 are twisted in reverse in one go on a series-type basket rope making machine. The twist pitch is set according to the above requirements. The center sub-rope is set to left-hand interlaced twist and the inner layer rope is set to right-hand interlaced twist. This can make the torsional torque between the two layers of rope cancel each other out and improve the structural stability of the inner layer rope. The first-layer strands 2, second-layer large strands 3, second-layer small strands 4, and third-layer strands 5 are all pre-formed. After passing through the pressure plate, post-deformation device, and sizing device, the center sub-rope and inner layer rope of the present invention are made in one go.
[0058] 4. Twist the outermost layer rope. Place the twenty fourth layer strands 6 and the inner layer rope on the basket-type rope combining machine. Set the twist pitch as required and set the twist method and direction to left-right alternating twist. The fourth layer strands 6 adopt a pre-forming process. Select the pre-deformation process parameters to ensure that the deformation of each strand is uniform. After passing through the pressure plate, post-deformation device and sizing device, the outermost layer rope is made.
[0059] 5. Twisting the outer layer rope: Place the twenty-four fifth-layer strands 7 and the second outer layer rope on the basket-type rope combining machine, set the twist pitch as required, and set the twist method and direction to right-hand interlaced twist. The fifth-layer strands 7 adopt a pre-forming process, select pre-deformation process parameters to ensure that the deformation of each strand is uniform and consistent. After passing through the pressure plate, post-deformation device and sizing device, the outer layer rope is made, and finally a large-diameter five-layer strand resistance rotating steel wire rope is obtained.
[0060] This invention provides a large-diameter, five-layer strand anti-rotation steel wire rope. Compared with traditional 35 (W) class steel wire rope, it increases the number of layers and strands, resulting in a longer strand length under the given conditions of wire rope diameter and twisting equipment, thus meeting market demands for wire rope length. The rope contains up to 79 strands, with 19 wires in each strand, enhancing overall flexibility. The strands are compacted, resulting in a smooth surface and increased contact area with operating equipment, further improving wear resistance. By performing reverse online twisting of the center sub-rope and inner layer ropes on a series-connected basket rope-making machine, it is more conducive to the mutual cancellation of torsional torque between rope layers and the structural stability of the inner layer rope. Through the configuration of the strand pitch and direction, the pitch ratio of each layer rope, and the opposite twist direction of adjacent layers, the torsional torque between each layer rope is balanced, enhancing the anti-rotation performance of the steel wire rope.
[0061] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0062] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims
1. A large-diameter five-layer strand resistance rotating steel wire rope, characterized in that, include: The central sub-rope, inner layer rope, second outer layer rope, and outer rope are arranged in order from the inside out; The central sub-rope includes a central strand (1), and a plurality of first-layer strands (2) are equally spaced on the outer periphery of the central strand (1). A plurality of second-layer small strands (4) and a plurality of second-layer large strands (3) are equally spaced on the outer periphery of the plurality of first-layer strands (2). The second-layer small strands (4) and the second-layer large strands (3) are arranged alternately. The inner rope includes a plurality of third-layer strands (5), which are circumferentially and equally spaced on the outside of a plurality of second-layer large strands (3) and a plurality of second-layer small strands (4); The outermost layer rope includes a plurality of fourth layer strands (6), which are circumferentially and equally spaced on the outside of the third layer strand (5); The outer rope includes a plurality of fifth strands (7), which are circumferentially and equally spaced on the outside of the fourth strand (6); The twist directions of the central strand (1), the first layer strand (2), the third layer strand (5), and the fifth layer strand (7) are the same. The twist directions of the second layer large strand (3), the second layer small strand (4), and the fourth layer strand (6) are the same. The twist directions of the first layer strand (2) and the second layer large strand (3) are opposite.
2. The large-diameter five-strand resistance rotating steel wire rope according to claim 1, characterized in that: The central strand (1) includes a central steel wire, and multiple second steel wires are equally spaced around the outer periphery of the central steel wire. Multiple third steel wires are equally spaced around the outer periphery of the multiple second steel wires. The two adjacent second steel wires and the two adjacent third steel wires are in contact with each other. The first layer stock (2), the second layer large stock (3), the second layer small stock (4), the third layer stock (5), the fourth layer stock (6), and the fifth layer stock (7) all have the same structure as the central stock (1).
3. The large-diameter five-strand resistance rotating steel wire rope according to claim 1, characterized in that: The twist pitch of the center strand (1) is 7.5 times its own strand diameter, and the twist pitch of the first layer strand (2), the second layer large strand (3), the second layer small strand (4), the third layer strand (5), the fourth layer strand (6), and the fifth layer strand (7) is 8.3 times its own strand diameter.
4. The large-diameter five-strand resistance rotating steel wire rope according to claim 1, characterized in that: The inner layer twist pitch is 6.5 times its own rope diameter, the center sub-twist pitch is 0.685 times the inner layer twist pitch, the second outer layer twist pitch is 6.7 times its own rope diameter, and the outer layer twist pitch is 7 times its own rope diameter.
5. A method for manufacturing a large-diameter five-strand resistance rotating steel wire rope, used to manufacture the large-diameter five-strand resistance rotating steel wire rope according to any one of claims 1-4, characterized in that, The steps are as follows: Step 1, Twisting: Twisting and compacting the finished steel wire according to the design parameters to produce the center strand (1), the first layer strand (2), the second layer large strand (3), the second layer small strand (4), the third layer strand (5), the fourth layer strand (6), and the fifth layer strand (7). Step 2: Twisting the center sub-rope and inner layer rope: Twisting the center strand (1), the first layer strand (2), the second layer large strand (3), the second layer small strand (4), and the third layer strand (5) in reverse one-time online, so that the twisting of the center sub-rope and the inner layer rope is completed simultaneously; Step 3, Twisting the outermost layer of rope: Twist multiple fourth-layer strands (6) to the outer layer of the inner rope; Step 4: Twist the outer layer rope: Twist multiple fifth layer strands (7) onto the outer layer of the secondary outer layer rope.
6. The method for manufacturing a large-diameter five-layer strand resistance rotating steel wire rope according to claim 5, characterized in that: In step one, the twist direction of the center strand (1), the first layer strand (2), the third layer strand (5) and the fifth layer strand (7) is left twist, and the twist direction of the second layer large strand (3), the second layer small strand (4) and the fourth layer strand (6) is right twist.
7. The method for manufacturing a large-diameter five-layer strand resistance rotating steel wire rope according to claim 5, characterized in that: In step one, the strand compression rate is set to 10.5% to 11.8%.
8. The method for manufacturing a large-diameter five-layer strand resistance rotating steel wire rope according to claim 5, characterized in that: In step two, the twisting direction of the central sub-rope is left-handed alternating twist, and the twisting direction of the inner layer rope is right-handed alternating twist.
9. A method for manufacturing a large-diameter five-layer strand resistance rotating steel wire rope according to claim 5, characterized in that: In step three, the twisting direction of the secondary outer layer rope twisting method is left-right alternating twist.
10. A method for manufacturing a large-diameter five-layer strand resistance rotating steel wire rope according to claim 5, characterized in that: In step four, the outer layer rope twisting method is a right-hand alternating twist.