Anti-abrasion and limiting structure for twisted cable of offshore wind turbine generator

Abstract

An anti-abrasion and limiting structure for a twisted cable of an offshore wind turbine generator aims to solve the problem that a power cable is prone to abrasion in the yaw or vibration process of the offshore wind turbine generator, and effective protection and limiting of the power cable are achieved by designing a comprehensive protection structure comprising a cable fixing assembly, a limiting assembly and a protection layer. The cable fixing assembly is made of a high-strength and corrosion-resistant material and can be customized according to the outer diameter of the power cable, so that the cable can be stably fixed; the limiting assembly is arranged between the adjacent fixing clamps, and the relative displacement of the cable is effectively limited through the limiting effect of the limiting block and the limiting spring; the protective layer is made of a wear-resistant and corrosion-resistant high-performance material and covers the surface of the cable to form a protective layer so as to isolate direct contact between the cable and the external environment; the power cable is simple in structure and convenient to install, the wear rate of the power cable can be obviously reduced, the service life of the cable is prolonged, and the operation stability and reliability of an offshore wind turbine generator are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind turbines, in particular to an offshore wind turbine twist cable anti-wear and limiting structure. Background Art

[0002] Offshore wind power, a vital component of renewable energy, has experienced rapid global growth in recent years. As the core equipment of wind power systems, the stability and durability of offshore wind turbines significantly impact the overall operational efficiency and economic benefits of wind farms. Power cables, key components for transmitting electrical energy within offshore wind turbines, have long been a research focus in terms of their deployment, fixing, and protection technologies.

[0003] In existing technology, power cables for offshore wind turbines are typically secured with simple brackets or clamps and protected with tie wraps and other methods. However, this type of securing and protection has significant drawbacks. First, because offshore wind turbines experience complex yaw and vibration during operation, power cables are susceptible to wear and tear due to friction or displacement. This wear not only degrades the cable's insulation performance but can also cause cable breakage, seriously impacting the unit's operational safety and reliability.

[0004] Secondly, existing cable fixing and protection methods often lack sufficient flexibility and adaptability. When the unit yaws or vibrates, the cables are easily deformed due to excessive tension or pressure, further exacerbating cable wear and aging. Furthermore, existing cable fixing structures are often relatively simple and fail to effectively limit relative displacement between cables, making them prone to entanglement or compression during vibration, further increasing the risk of cable wear.

[0005] In order to solve the above problems, experts, scholars and technicians in related fields at home and abroad have conducted a lot of research and exploration. For example, CN203335333U discloses a yaw cable anti-wear device, including a fixing frame and a sheath, the fixing frame is in the shape of a circular tube, and is composed of a first fixing frame and a second fixing frame fixedly connected; the sheath is arranged in the tube cavity of the fixing frame and can rotate circumferentially, and the two ends of the sheath extend from the two ends of the tube cavity, the sheath is composed of a first sheath and a second sheath, two first wire grooves are formed on the first sheath, and two second wire grooves are formed on the second sheath, and the two first wire grooves and the two second wire grooves are combined to form two wire holes for arranging the yaw cable; the first sheath and the second sheath are bonded by an adhesive and further fixedly connected by a second bolt fastening assembly; a first stop is provided between the two first wire grooves, and a second stop is provided between the two second wire grooves, the end face of the first stop is fitted with the end face of the second stop, a first fastening hole is provided on the first stop, and a second fastening hole is provided on the second stop opposite to the first fastening hole, and the second bolt fastening assembly is arranged through the first fastening hole and the second fastening hole. The structure of the utility model is very reasonable and can effectively ensure that the outer skin of the yaw cable is not worn; the device improves the stability and durability of the cable by increasing the fixing points of the cable and adopting special protective materials. However, the device still has some limitations in structural design and practical application, such as unreasonable setting of fixing points and insufficient performance of protective materials, which leads to its limited effect in solving the problem of cable wear.

[0006] In summary, existing methods for securing and protecting offshore wind turbine power cables have significant deficiencies and drawbacks, necessitating a novel twist cable wear prevention and position limiting structure to effectively address these issues. This utility model is proposed against this backdrop, aiming to improve the stability and durability of offshore wind turbine power cables through rational design and optimization, reducing the risk of cable wear and providing strong support for the sustainable development of the wind power industry. Utility Model Content

[0007] The technical problem to be solved by the utility model is to provide an offshore wind turbine twist cable anti-wear and limiting structure to solve the technical problem that the power cables of offshore wind turbines are easily worn due to mutual friction or displacement during yaw or vibration.

[0008] In order to solve the above technical problems, the technical solution adopted by the utility model is: an offshore wind turbine twist cable anti-wear and limiting structure, including several layers of cable limiting platforms arranged on the tower, each layer of the platform adopts a double-ring integral structure consisting of an outer ring cable protective tube and an inner ring cable spacer ring, and the outer periphery of the cable spacer ring is divided into several groups according to the ABC three-phase cable grouping of the power cable, each group of cables is fastened with a cable clamp, and the cable clamp is fixed to the outside of the cable spacer ring, and the cable spacer ring and the cable protective tube are connected with a spring flexible connection.

[0009] In a preferred solution, the cable protective tube is a cylindrical structure, divided into two semicircles, which are connected into a whole by bolts. The two semicircular structures rotate around the center and are elastically connected to the cable spacer ring through a spring to maintain stability.

[0010] In the preferred solution, the cable spacer is designed according to the outer metal and inner engineering plastic respectively. The outer periphery of the cable spacer is divided into several groups according to the ABC three-phase cable grouping of the power cable, and is evenly divided in the cable spacer and cable casing. Each group of cables is fastened with an aluminum cable clamp.

[0011] In a preferred solution, the cable spacer ring is an annular structure, and a plurality of cable clamps are densely and evenly installed on the outer ring, which are used to group the power cables and limit the relative displacement between the cables.

[0012] In a preferred solution, the cable clamp is made of aluminum and has a semicircular structure. A groove matching the outer diameter of the cable is provided on the inner side thereof for fastening the cable and preventing the cable from loosening.

[0013] In a preferred solution, the spring is a compression spring, both ends of which are connected to the cable protective tube and the cable spacer ring respectively. The elastic force of the spring allows the entire cable to swing elastically, thereby avoiding cable wear.

[0014] In a preferred solution, the cable limiting platforms are arranged at the fourth and third tower positions of the tower barrel to limit and protect the power cables.

[0015] In a preferred solution, it also includes a converter line inlet terminal arranged at the bottom of the tower, which is used to receive the power cable laid from the top of the tower to the bottom of the tower.

[0016] The preferred solution also includes a sensor for monitoring the degree of cable wear. The sensor is connected to the cable clamp to detect the wear of the cable in real time and transmit the signal to the external control system.

[0017] In a preferred solution, the external control system automatically adjusts the tension of the cable or issues an alarm signal based on the received wear signal to remind the operator to handle the problem in a timely manner.

[0018] The utility model provides an offshore wind turbine twist cable anti-wear and limit structure, which has the following beneficial effects:

[0019] 1. This utility model effectively solves the technical problem that the power cables of offshore wind turbines are easily worn due to mutual friction or displacement during yaw or vibration. Solving this problem is of great significance for improving the reliability and stability of wind turbines.

[0020] 2. The utility model realizes effective restriction of relative displacement between cables through the double-ring overall structural design of the outer ring cable casing and the inner ring cable spacer. This design not only enhances the fixing effect of the cables, but also reduces friction and wear between the cables.

[0021] 3. The three-phase power cables are grouped into groups (ABC) and fastened with aluminum cable clamps. This design improves the stability and fixation of the cables. The grouped fastening method helps to further reduce wear between cables and extend the service life of the cables.

[0022] 4. The spacer ring and the casing are connected by a spring-flexible connection, which allows the cable to remain stable while also allowing it to sway elastically according to the yaw and vibration of the unit. This design avoids cable wear caused by yaw or vibration of the unit and improves the durability of the cable.

[0023] 5. The utility model effectively solves specific problems such as wear of cable casings and cables, loss of cable spacers, and wear between cables at U-bends during yaw or vibration of offshore wind turbines. Solving these problems helps reduce the failure rate of wind turbines and improve overall performance.

[0024] 6. The utility model reduces cable wear and tear through innovative structural design, thus lowering the failure rate of wind turbines caused by cable damage. This improvement helps to improve the reliability and stability of wind turbines and reduce downtime.

[0025] 7. The utility model significantly improves the durability and service life of the cable through effective limit and flexible connection design. This improvement helps to reduce the maintenance cost of the wind turbine and extend the overall service life;

[0026] 8. The utility model reduces the failure and maintenance requirements caused by cable wear, thereby reducing the maintenance cost of wind turbines. This advantage helps to improve the economic benefits of wind power projects;

[0027] 9. This utility model reduces cable failures through innovative structural design, ensures the normal operation of wind turbines, and improves the power generation efficiency and overall performance of wind turbines. This improvement helps increase the power generation of wind power projects and improve energy utilization efficiency.

[0028] 10. The structure of the utility model also has an adaptive adjustment function, which can make fine adjustments according to the thermal expansion and contraction of the cable due to temperature changes, avoiding damage to the cable due to excessive tension or relaxation, further improving the safety performance and operation and maintenance efficiency of offshore wind turbines;

[0029] 11. This utility model effectively solves the wear problem of offshore wind turbine power cables during yaw or vibration through innovative double-ring overall structural design, cable grouping and tightening, spring flexible connection and other designs, improves the reliability and stability of wind turbines, reduces maintenance costs, and improves power generation efficiency and overall performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below with reference to the accompanying drawings and implementation examples:

[0031] Figure 1 Schematic diagram of the overall structure of the system of the utility model;

[0032] In the figure: cable protective tube 1, cable spacer 2, cable clamp 3, spring 4. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments:

[0034] Example 1

[0035] like Figure 1 As shown, an offshore wind turbine twist cable anti-wear and limiting structure includes several layers of cable limiting platforms arranged on the tower. Each layer of the platform adopts a double-ring integral structure consisting of an outer ring cable casing 1 and an inner ring cable spacer 2. The outer periphery of the cable spacer 2 is divided into several groups according to the ABC three-phase cable grouping of the power cable. Each group of cables is fastened with a cable clamp 3, and the cable clamp 3 is fixed to the outside of the cable spacer 2. The cable spacer 2 and the cable casing 1 are flexibly connected by a spring 4.

[0036] In this embodiment, the cable protective tube 1 is a cylindrical structure, divided into two semicircles, which are connected into a whole by bolts. The two semicircular structures rotate around the center and are elastically connected to the cable spacer ring 2 by a spring 4 to maintain stability.

[0037] Furthermore, the cable spacer ring 2 is designed with an outer metal layer and an inner engineering plastic layer. The outer periphery of the cable spacer ring 2 is divided into several groups according to the ABC three-phase cable grouping of the power cable, and is evenly divided inside the cable spacer ring 2 and the cable sheath 1. Each group of cables is fastened with an aluminum cable clamp 3.

[0038] Furthermore, the cable spacer ring 2 is an annular structure, and a plurality of cable clamps 3 are densely and evenly installed on the outer ring, which are used to group the power cables and limit the relative displacement between the cables.

[0039] Furthermore, the cable clamp 3 is made of aluminum and has a semicircular structure, and a groove matching the outer diameter of the cable is provided on the inner side thereof for fastening the cable and preventing the cable from loosening.

[0040] Furthermore, the spring 4 is a compression spring, and its two ends are respectively connected to the cable protective tube 1 and the cable spacer ring 2. The elastic force of the spring 4 allows the entire cable to swing elastically, thereby avoiding cable wear.

[0041] Furthermore, the cable limiting platforms are arranged at the fourth and third tower positions of the tower tube to limit and protect the power cables.

[0042] Furthermore, it also includes a converter line inlet terminal arranged at the bottom of the tower, which is used to receive the power cable laid from the top of the tower to the bottom of the tower.

[0043] Furthermore, it also includes a sensor for monitoring the degree of cable wear. The sensor is connected to the cable clamp 3, detects the wear of the cable in real time, and transmits the signal to the external control system.

[0044] Furthermore, the external control system automatically adjusts the tension of the cable or issues an alarm signal according to the received wear signal to remind the operator to deal with it in time.

[0045] Example 2

[0046] In another preferred embodiment, based on Example 1, Figure 1 As shown, this embodiment provides a specific implementation of the anti-wear and limit structure of the power cable of an offshore wind turbine:

[0047] This embodiment provides an offshore wind turbine twist cable wear prevention and position limiting structure, primarily used for the layout and protection of power cables within offshore wind turbines. Conventional offshore wind turbine power cables are routed from the generator outlet in the nacelle through the tower to the converter inlet at the tower base. Because there are up to 36 power cables and consideration of yaw twisting, cable layout within the tower is crucial.

[0048] During implementation, the cable is drawn from the generator outlet in the nacelle and laid downward along the inner wall of the tower. Several layers of cable retaining platforms are installed at the four-tower and three-tower locations, respectively. Each platform utilizes a dual-ring structure consisting of an outer cable sheath 1 and an inner cable spacer 2. The design of the cable sheath 1 and cable spacer 2 takes both strength and wear resistance into consideration. The sheath 1 utilizes a metal outer layer to enhance its wear resistance, while the cable spacer 2 utilizes a dual-layer design consisting of an outer metal layer and an inner engineering plastic material. This ensures sufficient strength while maintaining a certain degree of flexibility to accommodate the elastic swaying of the cable.

[0049] The cable spacers (2) divide the power cables into groups (A, B, and C), with each group equally spaced within the cable spacers (2) and cable jacket (1). To ensure cable stability on the restraining platform, each group is secured with aluminum cable clamps (3). These clamps are evenly spaced and installed on the outside of the cable spacers (2) and securely connected to the cable spacers (2) with bolts or clips. This securing method not only effectively limits relative displacement between the cables but also ensures a certain degree of elasticity when subjected to external forces, thereby preventing direct wear between the cables.

[0050] In addition, the cable spacer 2 and the cable casing 1 are flexibly connected by a spring 4. The arrangement of the spring 4 allows the cable to absorb and disperse external forces such as unit yaw or vibration through elastic deformation of the spring 4, thereby further protecting the cable from damage.

[0051] During implementation, the number of cable limiting platforms and the number and layout of cable protective tubes 1 and cable spacers 2 on each platform can be flexibly adjusted based on factors such as tower height, number of cables, and yaw angle. Furthermore, cable clamps 3 and springs 4 of varying materials and specifications can be selected based on actual needs to ensure the stability and durability of the entire limiting structure.

[0052] Example 3

[0053] In another preferred embodiment, based on Examples 1 and 2, Figure 1 As shown, this embodiment is essentially the same as Embodiments 1 and 2, but differs in the tightening method of the cable clamp 3 and the selection of the spring 4. In this embodiment, the cable clamp 3 adopts an adjustable tightening force design, and the degree of tightening of the cable is adjusted by rotating the adjustment bolt on the cable clamp 3. This design allows technicians to flexibly adjust the tightening force of the cable clamp 3 based on factors such as the cable diameter, material, and the amount of external force applied, thereby ensuring cable stability while avoiding excessive pressure on the cable.

[0054] Furthermore, this embodiment utilizes a material with a higher elastic modulus and improved fatigue resistance for the spring 4. This allows the spring 4 to return to its original state more quickly when subjected to external forces, thereby more effectively protecting the cable from damage. Furthermore, the lifespan of the spring 4 is significantly increased, reducing maintenance costs.

[0055] The proposed offshore wind turbine twist cable wear prevention and limiter structure effectively addresses the wear problem that occurs when power cables in offshore wind turbines yaw or vibrate. This structure not only offers the advantages of simplicity and ease of installation and maintenance, but also significantly improves the durability and safety of the cables, providing a strong guarantee for the stable operation of offshore wind turbines.

[0056] In the preferred solution, the cable protective tube 1 is a cylindrical structure, divided into two semicircles, which are connected into a whole by bolts. The two semicircular structures rotate around the center and are elastically connected to the cable spacer ring 2 by a spring 4 to maintain stability. The above arrangement not only facilitates the installation and disassembly of the cable protective tube 1, but also can effectively adapt to cables of different diameters. The elastic action of the spring 4 can also provide buffering when the cable expands and contracts due to heat and cold, thereby ensuring a close fit and long-term stability between the cable protective tube 1 and the cable.

[0057] In the preferred solution, the cable spacer ring 2 is designed with outer metal and inner engineering plastic respectively. The outer periphery of the cable spacer ring 2 is divided into several groups according to the ABC three-phase cable grouping of the power cable, and is evenly divided in the cable spacer ring 2 and the cable sheath 1. Each group of cables is fastened with an aluminum cable clamp 3; the above arrangement ensures the orderly arrangement and fixation of the cables in the cable sheath 1, effectively avoids mutual interference and wear between cables, improves the safety and stability of the cable system, and facilitates subsequent maintenance and management.

[0058] In the preferred solution, the cable spacer ring 2 is an annular structure, and a number of cable clamps 3 are densely and evenly installed on the outer ring, which are used to group the power cables and limit the relative displacement between the cables; the above setting can not only effectively avoid damage to the cables caused by mutual friction during operation, but also ensure that the cables are arranged neatly, which is convenient for subsequent maintenance and management, while improving the safety and reliability of cable laying.

[0059] In the preferred solution, the cable clamp 3 is made of aluminum and has a semicircular structure. The inner side of the clamp is provided with a groove that matches the outer diameter of the cable to tighten the cable and prevent it from loosening. The above setting not only ensures the stability of the cable installation, but also reduces the overall weight through the lightweight characteristics of the aluminum material, making it easier to install and maintain. At the same time, the semicircular structure design enhances the strength and durability of the cable clamp 3 and extends its service life.

[0060] In the preferred solution, the spring 4 is a compression spring, and its two ends are respectively connected to the cable protective tube 1 and the cable spacer ring 2. The elastic force of the spring 4 allows the cable as a whole to swing elastically, thereby avoiding cable wear; the above setting not only improves the durability of the cable, but also enables the cable to have a certain buffering capacity during installation and operation, effectively responding to the potential impact of external environmental changes on the cable, and ensuring the stability and safety of power transmission.

[0061] In the preferred solution, the cable limiting platform is arranged at the fourth and third tower positions of the tower to limit and protect the power cable; the above setting can effectively reduce the shaking and friction of the cable inside the tower, and improve the service life and safety of the cable; at the same time, the solution also takes into account the easy maintenance of the cable, which is convenient for the staff to inspect and replace it.

[0062] The preferred solution also includes a converter line inlet terminal arranged at the bottom of the tower, which is used to receive the power cable laid from the top of the tower to the bottom of the tower; the above setting can effectively reduce the laying length of the cable in the tower and reduce line loss. At the same time, the converter line inlet terminal is also equipped with a protective device to ensure that the power cable connection is stable and safe, thereby improving the overall operating efficiency of the wind tower.

[0063] The preferred solution also includes a sensor for monitoring the degree of cable wear. The sensor is connected to the cable clamp 3 to detect the wear of the cable in real time and transmit the signal to the external control system. The above setting can realize continuous monitoring of the cable status. Once the wear exceeds the preset threshold, the system will immediately issue an alarm to notify the maintenance personnel to replace or repair it in time to ensure the safe and stable operation of the power system.

[0064] In the preferred solution, the external control system automatically adjusts the cable tension or issues an alarm signal based on the wear signal received to remind the operator to deal with it in time; the above settings not only effectively prevent equipment failures caused by excessive cable wear, but also greatly improve maintenance efficiency and ensure the stable operation of the entire system; at the same time, the solution also has a self-diagnosis function, which can monitor and report the system status in real time.

[0065] In summary, the present invention innovatively proposes an offshore wind turbine twist cable anti-wear and limiting structure, which is specifically designed to address the wear problem of offshore wind turbine power cables that are easily caused by mutual friction or displacement during yaw or vibration. Compared with conventional solutions, this solution abandons the traditional single cable limiting platform design and instead adopts a double-ring integral structure combining an outer ring cable sheath 1 and an inner ring cable spacer 2. In this structure, the cable sheath 1 and the cable spacer 2 are respectively matched with a special design of outer metal and outer metal and inner engineering plastic, which not only enhances the strength and durability of the structure, but also optimizes the cable fixing effect. What is more unique is that the cable spacers 2 are carefully grouped according to the three phases of the power cable ABC, and are evenly distributed inside the cable spacer 2 and the cable sheath 1. Each group of cables is fastened by an aluminum cable clamp 3, and the cable clamp 3 is fixed to the cable spacer 2. Outside; This grouping and fastening method not only significantly improves the stability of the cable, but also effectively reduces the friction and wear between the cables, further extending the service life of the cable; in addition, a spring 4 flexible connection is adopted between the cable spacer 2 and the cable casing 1, so that the entire cable system can remain stable while also being able to elastically swing according to the yaw and vibration of the unit. This design not only improves the adaptability and durability of the cable, but also enhances the safety and stability of the entire wind turbine; through the innovative application of structural design, cable grouping and fastening methods and spring flexible connections, the utility model has achieved significant improvements and upgrades to the existing technology in the design of twisted cable wear protection and limiting structures of offshore wind turbines. This innovation has not only brought significant economic and social benefits to the development of the wind power industry, but also made important contributions to its development and progress, and promoted the wind power industry to develop in a more efficient, safer and more environmentally friendly direction.

Claims

1. An offshore wind turbine twist cable anti-wear and limit structure, characterized by: The utility model comprises a plurality of cable limiting platforms arranged on a tower, each platform adopts a double-ring integral structure consisting of an outer ring cable casing (1) and an inner ring cable spacer (2), the outer periphery of the cable spacer (2) is divided into a plurality of groups according to the ABC three-phase cable grouping of the power cable, each group of cables is fastened with a cable clamp (3), the cable clamp (3) is fixed on the outer side of the cable spacer (2), and a spring (4) is used to flexibly connect the cable spacer (2) and the cable casing (1).

2. The offshore wind turbine twist cable anti-wear and position limiting structure according to claim 1, characterized in that: The cable protective tube (1) is a cylindrical structure, divided into two semicircles, which are connected into a whole by bolts. The two semicircular structures rotate around the center and are elastically connected to the cable spacer ring (2) through a spring (4) to maintain stability.

3. The offshore wind turbine twist cable anti-wear and limit structure according to claim 2, characterized in that: The cable spacer ring (2) is designed with an outer metal layer and an inner engineering plastic layer. The outer periphery of the cable spacer ring (2) is divided into several groups according to the ABC three-phase cable grouping of the power cable. The cables are evenly divided in the cable spacer ring (2) and the cable casing (1). Each group of cables is fastened with an aluminum cable clamp (3).

4. The offshore wind turbine twist cable anti-wear and position limiting structure according to claim 3, characterized in that: The cable spacer ring (2) is an annular structure, and a plurality of cable clamps (3) are densely and evenly installed on the outer ring, which are used to group power cables and limit the relative displacement between cables.

5. The offshore wind turbine twist cable anti-wear and position limiting structure according to claim 4, characterized in that: The cable clamp (3) is made of aluminum and has a semicircular structure. A groove matching the outer diameter of the cable is provided on its inner side for fastening the cable and preventing the cable from loosening.

6. The offshore wind turbine twist cable anti-wear and position limiting structure according to claim 5, characterized in that: The spring (4) is a compression spring, and its two ends are respectively connected to the cable protective tube (1) and the cable spacer ring (2). The elastic force of the spring (4) enables the entire cable to shake elastically, thereby avoiding cable wear.

7. The offshore wind turbine twist cable anti-wear and position limiting structure according to claim 6, characterized in that: The cable limiting platforms are arranged at the fourth and third tower positions of the tower barrel and are used to limit and protect the power cables.

8. The offshore wind turbine twist cable anti-wear and position limiting structure according to claim 7, characterized in that: It also includes a converter line inlet terminal arranged at the bottom of the tower, which is used to receive the power cable laid from the top of the tower to the bottom of the tower.

9. The offshore wind turbine twist cable anti-wear and position limiting structure according to claim 8, characterized in that: It also includes a sensor for monitoring the degree of cable wear, the sensor is connected to the cable clamp (3), detects the wear of the cable in real time, and transmits the signal to the external control system.

10. The offshore wind turbine twist cable anti-wear and position limiting structure according to claim 9, characterized in that: The external control system automatically adjusts the tension of the cable or sends an alarm signal according to the received wear signal to remind the operator to deal with it in time.

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