Cable damping device

Abstract

The application provides a damping device for a cable, comprising a rack, a supporting mechanism, the supporting mechanism comprising a support concentrically arranged at an upper end surface of the rack and a cover plate installed at a top end of the support through a pre-tightening piece, a damping mechanism, the damping mechanism comprising a cable rod concentrically arranged in the support, a receiving plate sleeved outside the cable rod, and a first elastic body arranged between the receiving plate and the cover plate and a second elastic body arranged between the receiving plate and the support, wherein the cable rod is configured to be movable within a limited range of the first elastic body and the second elastic body. The elastic bodies in the application can be pre-tightened with each other after the pre-tightening of the bolt, thereby effectively prolonging the service life of the device.

Description

Technical Field

[0001] This invention relates to the field of vibration reduction technology, and more specifically to a vibration reduction device for cables. Background Technology

[0002] As offshore wind power equipment becomes larger and near-shore development resources become limited, the development of offshore wind farms is gradually expanding to deep-sea areas. Floating wind turbine technology has become a key focus, leading to continuous innovations in its form.

[0003] Currently, offshore wind energy is abundant, and actively developing offshore wind power can effectively alleviate the electricity pressure in coastal areas. Depending on the water depth and economic requirements, offshore wind turbine foundations generally adopt fixed foundations or floating foundations. Currently, about 81% of the offshore wind farms that have been built use fixed foundations.

[0004] From a basic design perspective, the column-mounted and semi-submersible types are still in the initial prototype verification stage, while the tension leg and barge-type types are in the research and development stage, with significant room for future technological advancements. The recently released dual-rotor floating offshore wind power platform carries two ultra-compact semi-direct drive offshore turbines, each with a total capacity exceeding 16MW. The two turbines are arranged in a "V" shape and share a single floating base. The dual rotors rotate in opposite directions, achieving mechanical balance through their yaw moment. Furthermore, the two turbines are tensioned together by a series of elastic cables. A vibration damping device is installed at the connection points between the elastic cables and the turbines, thus protecting components such as bolts, hubs, and the frame at the connection points.

[0005] As offshore wind power development moves from nearshore to deep-sea areas, fixed-foundation wind turbines suffer from drawbacks such as high cost and structural instability.

[0006] CN115539315A discloses a flexible vibration damping connection device. This device is used to install a cable rod with a cable nut, and includes a support with a conical surface; a partition plate disposed on the conical surface of the support; a rubber layer fixed between the partition plate and the support by vulcanization; and a fixing plate abutting against the partition plate, with the side of the fixing plate away from the partition plate abutting against the cable nut. Through holes for mounting the cable rod are provided at the central axes of the support, partition plate, rubber layer, and fixing plate. The fixing plate is configured to limit the tilt angle of the cable rod relative to the support. While this device can dampen vibrations, the elastomer lacks an eccentric design and self-pre-tightening function, resulting in a poor fatigue life over long-term use.

[0007] Therefore, it is desirable in the art to provide a vibration damping device for cables to solve the above-mentioned technical problems. Summary of the Invention

[0008] The purpose of this invention is to provide a vibration damping device for cables, which can convert the first and second elastic bodies from an eccentric state to a concentric state through pre-tensioning. This effectively improves the ability of the first and second elastic bodies to withstand and receive axial and deflection loads, thereby effectively extending the service life of the cable vibration damping device.

[0009] According to the present invention, a vibration damping device for cables is provided, comprising a frame, The support mechanism includes supports concentrically arranged on the upper end face of the frame, and a cover plate installed on the top of the supports by preload members. The vibration damping mechanism includes a cable rod concentrically arranged within the support, a receiving plate sleeved on the cable rod, a first elastic body disposed between the receiving plate and the cover plate, and a second elastic body disposed between the receiving plate and the support. The cable rod is configured to move within a range defined by the first elastic body and the second elastic body.

[0010] In one embodiment, the first elastomer and the second elastomer are arranged eccentrically.

[0011] In one embodiment, the cable damping device further includes a preload bolt that extends sequentially through the cover plate and the preload member to form a threaded connection with the support. The pre-tightening bolt is configured to apply a pre-tightening force to abut the cover plate against the pre-tightening member, thereby causing the first elastic body and the second elastic body to be concentric after pre-tightening.

[0012] In one embodiment, both the support and the receiving plate are constructed in a bowl shape, thereby causing the first elastomer and the second elastomer to have the same opening direction.

[0013] In one embodiment, both the first elastomer and the second elastomer are constructed as a single unit or as separate units, and the total volume of the first elastomer is smaller than the total volume of the second elastomer.

[0014] In one embodiment, both the first elastomer and the second elastomer include a plurality of stacked partitions and rubber vulcanized between adjacent partitions.

[0015] In one embodiment, the vibration damping mechanism further includes a washer sleeved on the cable rod and forming a sealed connection with the upper and lower end faces of the support plate, respectively, wherein the washer is in rigid contact with the support when the cable rod is tilted relative to the frame and reaches a defined angle.

[0016] In one embodiment, the vibration damping mechanism further includes a nut disposed above the washer and used to fasten the receiving plate.

[0017] In one embodiment, the pretensioner includes a fixed seat configured in an annular shape disposed at the edge of the support, and a support tube arranged circumferentially within the fixed seat, wherein a gap is left between the support tube and the cover plate in the initial state.

[0018] In one embodiment, the preload includes support tubes spaced circumferentially at the edge of the support, wherein in the initial state, there is a gap between the support tubes and the cover plate.

[0019] Compared with the prior art, the advantages of the present invention are as follows: Firstly, in this invention, the first and second elastic bodies are initially arranged eccentrically, and after being pre-tightened by pre-tightening bolts, they become concentric. This effectively improves the ability of the first and second elastic bodies to withstand and receive axial and deflection loads, thereby effectively extending the service life of the cable damping device.

[0020] Furthermore, since the receiving plate between the first elastic body and the second elastic body is not fixedly constrained, the cable rod can move axially or deflect through the receiving plate, which makes it easier for the cable damping device to achieve the deflection function and makes the structure and use of the cable damping device more efficient under deflection conditions.

[0021] Secondly, the present invention has good deflection performance, and the rubber in the first elastic body and the second elastic body will not be stretched during the deflection condition, and the contact position between the cover plate and the first elastic body and the contact position between the support and the second elastic body will not separate, thereby improving the axial ultimate tensile strength and the strength under the deflection condition of the cable damping device, thus improving the reliability of the overall structure. Attached Figure Description

[0022] The invention will now be described in detail with reference to the accompanying drawings, in which: Figure 1 A schematic cross-sectional view of the cable damping device according to the present invention is shown. Figure 2 for Figure 1 A partial view showing the cable damping device in a free state; Figure 3 for Figure 1 A partial view showing the cable damping device in a pre-tensioned state; Figure 4This illustrates the cable damping device according to the invention in a pre-tensioned, deflected state. Figure 5 The schematic diagram illustrates the structure of the first elastic body in the cable damping device according to the present invention; Figure 6 The schematic diagram illustrates the structure of the second elastic body in the cable damping device according to the present invention; Figure 7 A first embodiment of a preload in a cable damping device according to the present invention is shown; Figure 8 A second embodiment of the preload in a cable damping device according to the present invention is shown; Figure 9 A first embodiment of an elastomer in a cable damping device according to the present invention is shown; Figure 10 A second embodiment of the elastomer in the cable damping device according to the present invention is shown.

[0023] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale. Detailed Implementation

[0024] To make the technical solutions and advantages of the present invention clearer, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0025] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms “installation,” “connection,” “linking,” “fixing,” etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components.

[0027] Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] The invention will now be further described with reference to the accompanying drawings.

[0029] Figure 1 A schematic cross-sectional view of the cable damping device according to the present invention is shown. Figure 2 for Figure 1 A partial view showing the cable damping device in a free state; Figure 3 for Figure 1 A partial view showing the cable damping device in a pre-tensioned state; Figure 4 This illustrates the cable damping device according to the invention in a pre-tensioned, deflected state. Figure 5 The schematic diagram illustrates the structure of the first elastic body in the cable damping device according to the present invention; Figure 6 The schematic diagram illustrates the structure of the second elastic body in the cable damping device according to the present invention; Figure 7 A first embodiment of a preload in a cable damping device according to the present invention is shown; Figure 8 A second embodiment of the preload in a cable damping device according to the present invention is shown; Figure 9 A first embodiment of an elastomer in a cable damping device according to the present invention is shown; Figure 10 A second embodiment of the elastomer in the cable damping device according to the present invention is shown.

[0030] like Figure 1 As shown, the cable damping device 100 according to the present invention includes a frame 10, a support mechanism, and a damping mechanism. The support mechanism includes a support 21 concentrically arranged on the upper end face of the frame 10, and a cover plate 22 mounted on the top of the support 21 via a preload member 23 (described below). The damping mechanism is disposed between the support 21 and the cover plate 22, as described in detail below.

[0031] In one embodiment, such as Figure 1 As shown, the vibration damping mechanism includes a cable rod 31 concentrically arranged within the support 21 and a receiving plate 32 sleeved outside the cable rod 31, as well as an elastic body disposed between the receiving plate 32, the cover plate 22, and the support 21. The elastic body includes a first elastic body 33 and a second elastic body 34, wherein the first elastic body 33 is disposed between the receiving plate 32 and the cover plate 22, and the second elastic body 34 is disposed between the receiving plate 32 and the support 21.

[0032] Therefore, under the combined action of the first elastic body 33 and the second elastic body 34, the cable rod 31 can move axially or deflect within the support 21, thereby enabling the cable damping device 100 to achieve a good damping effect during operation.

[0033] According to the present invention, such as Figure 1 As shown, the cable damping device 100 also includes a preload bolt 40. Preferably, the preload bolt 40 is configured to extend sequentially through the cover plate 22 and the preload member 23 to form a threaded connection with the support 21.

[0034] In the initial state, the first elastic body 33 and the second elastic body 34 are arranged eccentrically.

[0035] In this invention, by tightening the preload bolt 40, a preload force is applied to the cover plate 22 and the preload member 23, causing the cover plate 22 and the preload member 23 to abut against each other. Simultaneously, the cover plate 22, the receiving plate 32, and the support 21 press against each other, causing the first elastic body 33 and the second elastic body 34 to be in a preloaded state. Preferably, the preloaded first elastic body 33 and the second elastic body 34 are concentric, thereby improving their ability to withstand axial and deflection loads, and thus significantly increasing their service life.

[0036] Combination Figure 2 and 3 The pre-tensioning process of the vibration damping device 100 for cables is described.

[0037] like Figure 2 As shown, the cable damping device 100 is in a free state, with a gap S between the cover plate 22 and the pretensioner 23. By tightening the pretensioning bolt 40, the cover plate 22 moves downward, thereby transmitting the pretensioning force sequentially to the first elastic body 33, the receiving plate 32, the second elastic body 34, and the support 21, until the cover plate 22 and the pretensioner 23 form a gap S. Figure 3 The axial contact shown completes the pre-tightening process. At this point, the gap between the cover plate 22 and the pre-tightening member 23 is eliminated (S=0), and the pre-tightening bolt 40 puts both the first elastic body 33 and the second elastic body 34 in a pre-compressed state.

[0038] In one embodiment, both the support 21 and the receiving plate 32 are constructed in a bowl shape, thereby causing the first elastic body 33 and the second elastic body 34 to have the same opening direction. It is readily understood that the present invention employs an asymmetrical assembly structure, and because this structure can achieve a stacking effect, the structure employed in the present invention can have a smaller volume and mass under the same load.

[0039] In one embodiment, such as Figure 9 and 10As shown, both the first elastic body 33 and the second elastic body 34 are constructed as an integral or separate unit.

[0040] The following section uses the first elastic body 33 as an example for detailed explanation. The integral type can be understood as a hollow, bowl-shaped structure. This structure features strong integrity and uniform stress distribution, thus effectively dispersing the preload and subsequent compressive stress, thereby improving the vibration damping effect and stability of the cable damping device 100. The split type can be understood as multiple fan-shaped structures arranged at intervals along the circumference. This structure has good flexibility and deformation capacity, thus effectively improving the vibration damping effect and stability of the cable damping device 100.

[0041] In a preferred embodiment, the total volume of the first elastic body 33 is smaller than the total volume of the second elastic body 34. Since the lower part of the cable rod 31 rotates significantly more than the upper part during its deflection motion, the layout of this invention achieves good matching with the deflection motion of the cable rod 31, ensuring the stability and flexibility of the cable rod 31 during its deflection motion.

[0042] In one embodiment, the contact surfaces between the cover plate 22, the first elastic body 33, the second elastic body 34, and the support 21 are all spherical.

[0043] Combination Figure 2 , 3 Sections 5 and 6 will be used to describe the design of the eccentricity of the first elastic body 33 and the second elastic body 34 in this invention.

[0044] like Figure 2 and 3 As shown, in this invention, the radius of the contact surface (spherical surface) between the cover plate 22 and the first elastic body 33 is R1; the radius of the contact surface (spherical surface) between the support 21 and the second elastic body 34 is R2. Figure 5 As shown, in this invention, the radius of the contact surface (spherical surface) between the first elastic body 33 and the cover plate 22 is R3; the radius of the contact surface (spherical surface) between the first elastic body 33 and the receiving plate 32 is R4. Figure 6 As shown, the radius of the contact surface (spherical surface) between the second elastic body 34 and the receiving plate 32 in this invention is R5; the radius of the contact surface (spherical surface) between the second elastic body 34 and the support 21 in this invention is R6.

[0045] Preferably, R1 = R3, R2 = R6, and the centers of R1 and R3 are always concentric, as are the centers of R2 and R6.

[0046] In one embodiment, when the cable damping device 100 is in a free state, the centers of R1 and R2, R3 and R4, and R5 and R6 are all eccentrically arranged, that is, the centers are all on the central axis of the cable rod 31 but not at the same point.

[0047] In a preferred embodiment, the center distance between R1 and R2 is S1, which is the total eccentricity S of the cable damping device 100; the center distance between R3 and R4 is S2, which is the eccentricity of the first elastic body 33; and the center distance between R5 and R6 is S3, which is the eccentricity of the second elastic body 34. Wherein, S = S1 = S2 + S3. Furthermore, when the cable damping device 100 is in a pre-tensioned state, S1, S2, and S3 all become 0. At this time, the centers of R1, R2, R3, R4, R5, and R6 are all at the same point, meaning the first elastic body 33 and the second elastic body 34 are concentric.

[0048] In this invention, the pre-tightening process not only ensures that both the first elastic body 33 and the second elastic body 34 are simultaneously in a pre-tightened state, but also causes them to change from an eccentric state to a concentric state. This allows the first elastic body 33 and the second elastic body 34 to more easily receive and adapt to axial and deflection loads, thereby effectively extending the service life of the cable damping device 100.

[0049] In one embodiment, both the first elastomer 33 and the second elastomer 34 include a plurality of stacked partitions and rubber vulcanized between adjacent partitions.

[0050] Combination Figure 5 The specific structure of the first elastic body 33 is described below. In this invention, the first elastic body 33 includes three spaced-apart partitions, which are partition 331, partition 332, and partition 333 from top to bottom. Preferably, rubber is vulcanized between partition 331 and partition 332 and between partition 332 and partition 333, respectively, thereby ensuring a stable connection between partition 331, partition 332, and partition 333.

[0051] In one embodiment, when the cable damping device 100 is in a free state, the centers of partitions 331, 332, and 333 are eccentrically arranged, meaning the centers of each partition are not at the same point and there is a certain amount of eccentricity between them, and the sum of the eccentricities among the three is S2. Preferably, when the cable damping device 100 is in a pre-tensioned state, the centers of partitions 331, 332, and 333 are concentrically arranged, meaning the centers of each partition are at the same point, and in this case, S2 = 0.

[0052] Combination Figure 6The specific structure of the second elastic element 34 is described below. In this invention, the second elastic element 34 includes four spaced-apart partitions, which are, from top to bottom, partition 341, partition 342, partition 343, and partition 344. Preferably, rubber is vulcanized between the four partitions, thereby ensuring a stable connection between partitions 341, 342, 343, and 344.

[0053] The present invention has good deflection performance, and the rubber in the first elastic body 33 and the second elastic body 34 will not be stretched during the deflection condition, and the contact positions between the cover plate 22 and the first elastic body 33 and the support 21 and the second elastic body 34 will not separate, thereby improving the axial ultimate tensile strength and the strength under the deflection condition of the cable damping device 100, and improving the reliability of the overall structure.

[0054] According to the present invention, such as Figure 1 and 5 As shown, the vibration damping mechanism also includes washers 35 sleeved around the cable rod 31 and forming a sealed connection with the upper and lower end faces of the receiving plate 32, respectively. Preferably, when the cable rod 31 is tilted relative to the frame 10 and reaches a predetermined angle, the washers 35 are in rigid contact with the support 21, thereby effectively limiting the cable rod 31. Furthermore, during the aforementioned deflection process, the cable rod 31 will compress the first elastic body 33 and the second elastic body 34, thereby ensuring that the cable rod 31 can move stably within the support 21.

[0055] In a preferred embodiment, such as Figure 4 As shown, the maximum deflection angle of the cable rod 31 within the support 21 is α.

[0056] In one embodiment, the cable rod 31 can also move axially, and under the action of the first elastic body 33 and the second elastic body 34, it can achieve the purpose of limiting the axial movement stroke of the cable rod 31.

[0057] According to the present invention, such as Figure 1 and 5 As shown, the vibration damping mechanism also includes a nut 36 disposed above the washer 35 for fastening the receiving plate 32. In this way, the receiving plate 32 can be firmly installed on the cable rod 31, thereby ensuring that the cable rod 31 can smoothly complete axial movement and deflection movement under the action of the first elastic body 33 and the second elastic body 34, so as to achieve the purpose of vibration damping of the cable damping device 100.

[0058] In other embodiments, such as Figure 1After the cable damping device 100 is installed, the frame 10 can be unconstrained, while the connecting pair consisting of the receiving plate 32, cable rod 31, nut 36 and washer 35 can be constrained. At this time, the frame 10 can perform axial movement and deflection movement, and the maximum deflection angle of the deflection movement is also α.

[0059] Combination Figure 7 The first embodiment of the pretensioner 23 is introduced: the pretensioner 23 includes a ring-shaped fixing seat 231 disposed on the edge 211 of the support 21, and support tubes 232 arranged circumferentially within the fixing seat 231. In the initial state, a gap exists between the support tubes 232 and the cover plate 22, i.e. Figure 2 In this way, the cable damping device 100 has good overall integrity, making it easier to align the through holes on the cover plate 22 with the support tube 232 one by one, thereby improving work efficiency.

[0060] Combination Figure 8 A second embodiment of the pretensioner 23 is introduced: the pretensioner 23 includes support tubes 233 spaced circumferentially at intervals along the edge portion 211 of the support 21, wherein, in the initial state, a gap is left between the support tubes 233 and the cover plate 22, i.e. Figure 2 In this way, the cable damping device 100 has good flexibility, and the overall mass of the cable damping device 100 can be adjusted by increasing or decreasing the number of support tubes 233.

[0061] In one embodiment, the frame 10 and the support 21 are fixedly connected by screws 11. This effectively improves the robustness between the frame 10 and the support 21, further enhancing the overall integrity and stability of the cable damping device 100.

[0062] Compared to existing technologies, the advantages of this invention are: Firstly, in this invention, the first elastic body 33 and the second elastic body 34 are initially arranged eccentrically, and after being pre-tightened by the pre-tightening bolt 40, the first elastic body 33 and the second elastic body 34 are concentric. This effectively improves the ability of the first elastic body 33 and the second elastic body 34 to withstand and receive axial loads and deflection loads, thereby effectively extending the service life of the cable damping device 100.

[0063] Furthermore, since the receiving plate 32 located between the first elastic body 33 and the second elastic body 34 is not fixedly constrained, the cable rod 31 can move axially or deflect through the receiving plate 32, thereby making it easier for the cable damping device 100 to achieve the deflection function, and making the structure and use of the cable damping device 100 more efficient under deflection conditions.

[0064] Secondly, the present invention has good deflection performance, and the rubber in the first elastic body 33 and the second elastic body 34 will not be stretched during the deflection condition, and the contact position between the cover plate 22 and the first elastic body 33 and the contact position between the support 21 and the second elastic body 34 will not separate, thereby improving the axial ultimate tensile strength and the strength under the deflection condition of the cable damping device 100, thus improving the reliability of the overall structure.

[0065] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A vibration damping device for cables, comprising: Rack (10) The support mechanism includes a support (21) concentrically arranged on the upper end face of the frame (10) and a cover plate (22) installed on the top of the support (21) by a preload (23). The vibration damping mechanism includes a cable rod (31) concentrically arranged in the support (21), a receiving plate (32) sleeved on the cable rod (31), a first elastic body (33) respectively disposed between the receiving plate (32) and the cover plate (22), and a second elastic body (34) disposed between the receiving plate (32) and the support (21). The cable rod (31) is configured to move within a defined range between the first elastic body (33) and the second elastic body (34), the first elastic body (33) and the second elastic body (34) being eccentrically arranged, and the cable damping device further includes a preload bolt (40) that extends sequentially through the cover plate (22) and the preload member and forms a threaded connection with the support (21). The pre-tightening bolt (40) is configured to apply a pre-tightening force to make the cover plate (22) abut against the pre-tightening member, so as to make the first elastic body (33) and the second elastic body (34) concentric after pre-tightening.

2. The vibration damping device for cables according to claim 1, characterized in that, Both the support (21) and the receiving plate (32) are constructed in a bowl shape, thereby causing the first elastic body (33) and the second elastic body (34) to have the same opening direction.

3. The vibration damping device for cables according to claim 2, characterized in that, Both the first elastomer (33) and the second elastomer (34) are constructed as an integral or separate unit, and the total volume of the first elastomer (33) is smaller than the total volume of the second elastomer (34).

4. The vibration damping device for cables according to claim 3, characterized in that, Both the first elastomer (33) and the second elastomer (34) include a plurality of stacked partitions and rubber vulcanized between adjacent partitions.

5. The vibration damping device for cables according to claim 4, characterized in that, The vibration damping mechanism also includes a washer (35) sleeved on the outside of the cable rod (31) and forming a sealed connection with the upper and lower end faces of the receiving plate (32) respectively. When the cable rod (31) is tilted relative to the frame (10) and reaches a limited angle, the washer (35) is in rigid contact with the support (21).

6. The vibration damping device for cables according to claim 5, characterized in that, The vibration damping mechanism also includes a nut (36) disposed above the washer (35) and used to fasten the receiving plate (32).

7. The vibration damping device for cables according to claim 6, characterized in that, The pretensioning member includes a ring-shaped fixing seat (231) disposed on the edge (211) of the support (21), and a support tube arranged circumferentially within the fixing seat (231), wherein, in the initial state, there is a gap between the support tube and the cover plate (22).

Images