Wear-resistant winch rope

Abstract

The utility model relates to the technical field of ropes, in particular to a wear-resistant capstan rope which comprises a rope body and a glue layer wrapping the rope body, the rope body is formed by weaving a plurality of plied yarns in the S-twist direction and a plurality of plied yarns in the Z-twist direction, and the glue layer is arranged between the plied yarns in the S-twist direction and the plied yarns in the Z-twist direction. The plied yarn is formed by plying and twisting multiple strands of ultra-high molecular weight polyethylene fiber monofilaments, the ultra-high molecular weight polyethylene fiber monofilaments are formed by conducting monofilament twisting on ultra-high molecular weight polyethylene fibers, and the wear resistance is improved.

Description

Technical Field

[0001] This application relates to the technical field of ropes, and in particular to a wear-resistant winch rope. Background Technology

[0002] Ultra-high molecular weight polyethylene (UHMWPE) fiber possesses excellent properties such as lightweight, high strength, and low-temperature resistance, making it widely used in heavy-duty applications such as winch ropes. Existing winch ropes made from UHMWPE fiber are constructed by twisting and braiding multiple strands of UHMWPE fiber together. However, due to the surface inertness of UHMWPE fiber, such as its non-polarity and low surface energy, the cohesion between fibers is poor. This results in a loose structure between the twisted strands, allowing external particles such as mud and sand to easily embed into the structure, thus accelerating wear. Utility Model Content

[0003] To improve wear resistance, this application provides a wear-resistant winch rope.

[0004] This application provides a wear-resistant winch rope, which adopts the following technical solution:

[0005] A wear-resistant winch rope includes a rope body and an adhesive layer wrapped around the rope body. The rope body is woven from multiple strands of twisted wires in the S-twist direction and multiple strands of twisted wires in the Z-twist direction. Each strand of twisted wire is formed by twisting multiple strands of ultra-high molecular weight polyethylene (UHMWPE) fiber monofilaments. The UHMWPE fiber monofilaments are formed by twisting UHMWPE fibers into single strands.

[0006] By employing the above technical solution, ultra-high molecular weight polyethylene (UHMWPE) fibers are twisted into single filaments and then twisted together to initially form a helical structure, enhancing the cohesion between fibers and preventing loosening during subsequent twisting. Finally, after weaving, an adhesive layer is formed by impregnation. This adhesive layer provides protection, improving abrasion resistance and delaying aging caused by prolonged direct exposure of the UHMWPE fibers. It also improves abrasion resistance to some extent.

[0007] In one embodiment, the twisting direction of the plywood is opposite to the twisting direction of the ultra-high molecular weight polyethylene fiber monofilaments within it.

[0008] By adopting the above technical solution, reverse twisting can offset the internal stress of monofilaments, forming a stable helical structure and reducing the rotational torque of the rope during use. In particular, the rotational torque of winch ropes can cause uneven wear with pulleys / winch, thus exacerbating wear problems. At the same time, it enhances interlayer friction and improves overall tensile and wear resistance.

[0009] In one embodiment, the twist of the ultra-high molecular weight polyethylene fiber monofilament is greater than that of the twist of the plywood.

[0010] By adopting the above technical solution, on the one hand, when the monofilament twist is high, the monofilament spiral structure is tight, which facilitates the formation of a stable strand base when multiple strands converge. On the other hand, ultra-high molecular weight polyethylene fibers have a smooth surface and high modulus. If the twist is too high during stranding, the friction between strands increases, which can easily lead to fiber surface wear or internal stress concentration, thus reducing strength. Although this setting will result in lower inter-strand bonding force, it can be compensated for by the adhesive layer design.

[0011] In one embodiment, the twist of the twisted yarn is 0.6-0.7 times that of the twist of the ultra-high molecular weight polyethylene fiber monofilament.

[0012] By adopting the above technical solution, the contact area is increased under the premise of monofilament twisting. A lower twist than that of monofilament can form a stable structure through reverse twisting, while reducing the rigidity of the strands and facilitating tight weaving during subsequent weaving. However, excessive twist in the ply can also lead to unevenness on the surface of the strands, increasing frictional damage during weaving.

[0013] In one embodiment: the twist of the ultra-high molecular weight polyethylene fiber monofilament is 38~50 twists / meter, and the specification of the ultra-high molecular weight polyethylene fiber monofilament is 1400D~2000D.

[0014] By adopting the above technical solution, 1400D~2000D fibers are considered coarse denier fibers. They have a smooth surface but low friction between monofilaments. Coarse denier fibers require sufficient twist to overcome their rigidity and form a tight helical structure to prevent slippage between monofilaments during twisting. Twists below 38 per meter may cause the monofilaments to become loose, while twists above 50 per meter will increase the internal stress of the fiber. In particular, ultra-high molecular weight polyethylene fibers generally have low torsional resistance, and excessive twisting can easily cause microcracks.

[0015] In one embodiment, the twisting tension of the ultra-high molecular weight polyethylene fiber monofilament is greater than the twisting tension of the plywood.

[0016] In one embodiment, the twisting tension of the ultra-high molecular weight polyethylene fiber monofilament is 15%-20% of the fiber breaking strength.

[0017] By adopting the above technical solution, coarse denier monofilaments have high rigidity. If the tension is too high during twisting (>25% of breaking strength), the fiber is prone to breakage due to stress concentration at the turning point of the twisting roller. In contrast, ultra-high molecular weight polyethylene fibers have strong surface inertness and a low coefficient of friction (approximately 0.15~0.2). If the tension is insufficient when directly twisting the monofilaments, the fibers are prone to slippage, resulting in unstable twist and loose strands. A fiber breaking strength range of 15%-20% is considered more reasonable.

[0018] In one embodiment, the twisting tension of the twisted yarn is 15%-20% lower than that of the ultra-high molecular weight polyethylene fiber monofilament.

[0019] By adopting the above technical solution, firstly, if the twisting tension is equal to or higher than the single twist, the individual filaments cannot rotate freely due to excessive tension during reverse twisting, resulting in residual torsional stress inside the strand, which easily leads to "untwisting" and kinking during use. Secondly, the twisting tension must be sufficient to make the individual filaments evenly close together during reverse twisting, forming a compact cylinder with an ellipticity of <5, without destroying the initial helical structure already formed by the individual filaments. The tension difference created by single twist > twisting allows the individual filaments to slightly rebound during stranding, filling the gaps inside the strand, thereby improving surface abrasion resistance.

[0020] In one embodiment: the strands in the S-twist direction are twisted using Z-twist, and the strands in the Z-twist direction are twisted using S-twist.

[0021] By adopting the above technical solution, the spindle rotation direction is opposite to the twist direction of the strands, so that the "untwisting tendency" of the strands during the weaving process is offset by the "twisting tendency" of the spindle rotation, thus avoiding loose strands or overall rope twisting, while ensuring that the strands at the weaving point are tightly interwoven, improving surface wear resistance.

[0022] In one embodiment, the twist ratio of the rope body is 7 to 9 times.

[0023] By adopting the above technical solution, the twist ratio refers to the ratio of the twist pitch of the rope or strand to its outer diameter. The smaller the ratio, the higher the weaving density, the tighter the surface, and the improved abrasion resistance, but the reduced flexibility. If the ratio is too large, it will lead to a loose surface, and mud and sand will easily embed into the abrasive fibers. A ratio of 7 to 9 is a reasonable medium ratio, with a dense surface that can withstand the bending of the winch. Attached Figure Description

[0024] Figure 1 This is a structural diagram of the wear-resistant winch rope in this embodiment;

[0025] Figure 2 This is a schematic diagram of the structure of the strand in this embodiment.

[0026] In the diagram, 100 is the rope body; 200 is the adhesive layer; 300 is the twisted wire; and 400 is the ultra-high molecular weight polyethylene fiber monofilament. Detailed Implementation

[0027] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0028] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", 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 application and simplifying the description, and do not 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 application.

[0029] A type of wear-resistant winch rope, such as Figure 1 As shown, it includes a rope body 100 and an adhesive layer 200 wrapped around the rope body 100. The adhesive layer 200 is formed by two impregnations.

[0030] The first soaking process involves soaking the rope for 30 minutes after 100% of the rope body has been woven, ensuring that the rope is thoroughly soaked. During soaking, an oxygenation rod is used to ensure that the glue flows and does not settle. Then, the rope is squeezed by a sleeve and rolled up by a gluing machine to ensure that the glue is applied evenly. Finally, the rope is naturally air-dried.

[0031] After the first impregnation, a pre-tensioning method is used to make the inner core structure more compact and the tension between fibers more even. One end is connected to a winch, and the other end is connected to a fixed end. Pre-tensioning is performed by raising and lowering the winch, with a pre-tension force of 30% of the rope. Then, it is left to stand for at least 20 minutes. Then, a second impregnation is performed. During the impregnation, an oxygenation rod is used to keep the glue flowing and to prevent the glue from settling. After this second impregnation, the entire rope is soaked and then removed and dried.

[0032] The rope body 100 is woven from multiple strands 300 in the S-twist direction and multiple strands 300 in the Z-twist direction. The strands 300 in the S-twist direction are those installed on the S-twist spindles of the braiding machine, and the strands 300 in the Z-twist direction are those installed on the Z-twist spindles of the braiding machine. Typically, the number of strands 300 in the S-twist and Z-twist directions is the same to avoid roundness deformation of the rope cross-section and ensure uniform overall abrasion resistance. Since this application is used for winch ropes, it typically uses 6 Z-twist spindles and 6 S-twist spindles.

[0033] Furthermore, the strand 300 in the S-twist direction is twisted using a Z-twist, and the strand 300 in the Z-twist direction is twisted using an S-twist. The twist ratio of the rope body 100 is 7 to 9 times.

[0034] See attached document Figure 2 The 300 strands of twisted yarn are formed by twisting multiple strands of ultra-high molecular weight polyethylene fiber monofilaments 400 together. The ultra-high molecular weight polyethylene fiber monofilaments 400 are formed by twisting ultra-high molecular weight polyethylene fibers into single filaments.

[0035] The twist of the UHMWPE monofilament 400 is 38-50 twists / meter, and the specification of the UHMWPE monofilament 400 is 1400D-2000D. The twist is determined based on the limit specification. In this embodiment, the specification of the UHMWPE monofilament 400 is 1600D, and the twist is 40 twists / meter.

[0036] The twisting direction of the twisted yarn 300 is opposite to that of the twisting direction of the ultra-high molecular weight polyethylene fiber monofilament 400 inside it.

[0037] The twist of the ultra-high molecular weight polyethylene (UHMWPE) fiber monofilament 400 is greater than that of the twist of the ply yarn 300. Preferably, the twist of the ply yarn 300 is 0.6-0.7 times that of the UHMWPE fiber monofilament 400. In this embodiment, the twist of the ply yarn 300 is 25 twists / meter.

[0038] The twisting tension of UHMWPE monofilament 400 is greater than that of twisted yarn 300. The twisting tension of UHMWPE monofilament 400 is 15%-20% of the fiber breaking strength. The twisting tension of UHMWPE monofilament 400 can be determined according to actual needs.

[0039] The twisting tension of the twisted yarn 300 is 15%-20% lower than that of the ultra-high molecular weight polyethylene fiber monofilament 400. The greater the twisting tension of the ultra-high molecular weight polyethylene fiber monofilament 400, the greater the difference between the twisting tension of the twisted yarn 300 and the twisting tension of the ultra-high molecular weight polyethylene fiber monofilament 400.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A wear-resistant winch rope, characterized in that: The rope includes a rope body (100) and an adhesive layer (200) wrapped around the rope body (100). The rope body (100) is woven from multiple strands of twisted yarn (300) in the S-twist direction and multiple strands of twisted yarn (300) in the Z-twist direction. Each strand of twisted yarn (300) is formed by twisting multiple strands of ultra-high molecular weight polyethylene fiber monofilaments (400). The ultra-high molecular weight polyethylene fiber monofilaments (400) are formed by twisting ultra-high molecular weight polyethylene fibers into monofilaments.

2. The wear-resistant winch rope according to claim 1, characterized in that: The twisting direction of the ply yarn (300) is opposite to the twisting direction of the ultra-high molecular weight polyethylene fiber monofilament (400) inside it.

3. The wear-resistant winch rope according to claim 1 or 2, characterized in that: The twist of the ultra-high molecular weight polyethylene fiber monofilament (400) is greater than that of the twist of the plywood (300).

4. The wear-resistant winch rope according to claim 3, characterized in that: The twist of the twisted yarn (300) is 0.6-0.7 times that of the twist of the ultra-high molecular weight polyethylene fiber monofilament (400).

5. The wear-resistant winch rope according to claim 4, characterized in that: The twist of the ultra-high molecular weight polyethylene fiber monofilament (400) is 38~50 twists / meter, and the specifications of the ultra-high molecular weight polyethylene fiber monofilament (400) are 1400D~2000D.

6. The wear-resistant winch rope according to claim 2, characterized in that: The twisting tension of the ultra-high molecular weight polyethylene fiber monofilament (400) is greater than that of the twisting tension of the plywood (300).

7. The wear-resistant winch rope according to claim 6, characterized in that: The twisting tension of the ultra-high molecular weight polyethylene fiber monofilament (400) is 15%-20% of the fiber breaking strength.

8. The wear-resistant winch rope according to claim 6 or 7, characterized in that: The twisting tension of the twisted yarn (300) is 15%-20% lower than that of the ultra-high molecular weight polyethylene fiber monofilament (400).

9. The wear-resistant winch rope according to claim 1, characterized in that: The strand (300) in the S-twist direction is twisted by Z-twist, and the strand (300) in the Z-twist direction is twisted by S-twist.

10. The wear-resistant winch rope according to claim 1, characterized in that: The twist ratio of the rope body (100) is 7 to 9 times.

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