Intelligent electromagnetic rheological damping device and offshore wind power intelligent damping system

Abstract

The application provides an intelligent electromagnetic rheological damping vibration reduction device and an offshore wind power intelligent vibration reduction system, and at least comprises an intelligent damping rod, a limiting cylinder, a spherical mass block, a data acquisition and control module and a sensor; the intelligent damping rod comprises a magneto-rheological fluid column and an electromagnetic solenoid; the intelligent damping rod is connected to the inner wall of a vibrating body and the outer wall of the limiting cylinder at two ends respectively; a piezoelectric composite material layer is arranged on the inner wall of the limiting cylinder; the spherical mass block is arranged in the interior of the limiting cylinder to realize energy dissipation and vibration reduction in a free rolling and colliding manner; the sensor is arranged on the inner wall of the vibrating body to monitor the vibration condition of the vibrating body; the data acquisition and control module is used for collecting the data of the piezoelectric composite material layer and the sensor and controlling the magnetic field intensity of the electromagnetic solenoid in the intelligent damping rod to adjust the viscosity of the magneto-rheological fluid in the magneto-rheological fluid column, so that intelligent regulation and control of damping is realized.

Description

Technical Field

[0001] This application relates to the field of vibration reduction device technology, and in particular to an intelligent electromagnetic rheological damping vibration reduction device and an intelligent vibration reduction system for offshore wind power. Background Technology

[0002] Offshore wind power, with its advantages of low wind shear, high wind speed, low noise pollution, large reserves, and no occupation of onshore arable land, will become a key focus of future wind power development research. Studies have found that highly flexible wind turbine blades and taller towers are more susceptible to the complex marine environment. With the continuous increase in tower height and blade length, vibration problems are becoming increasingly prominent. These vibration issues directly threaten the safe and stable operation of wind turbines and significantly increase the operation and maintenance costs of offshore wind farms. Therefore, effective vibration control of wind turbines to ensure their safe and stable operation is a current research priority.

[0003] The wind turbine tower is the main structure supporting the turbine blades and generator, and its vibration directly affects the safety, stability, and operating efficiency of the turbine. Frequent vibration can cause fatigue accumulation in materials, leading to cracks, deformation, or failure, and ultimately potentially causing the tower structure to collapse. Excessive tower vibration can cause overall turbine instability, increasing the risk of overturning or collapse, which poses a threat to the safety of maintenance and operation personnel, as well as surrounding offshore facilities and vessels. Therefore, reducing wind turbine tower vibration is crucial for ensuring safe operation, improving reliability, and extending the lifespan of the turbine. Employing appropriate vibration reduction technologies and structural design, along with regular monitoring and maintenance, can effectively reduce the damage caused by vibration to the wind turbine tower.

[0004] Currently, the common vibration reduction devices used in offshore wind turbines are relatively simple and mostly passively controlled. The damping coefficient of the damper is not adjustable, which cannot meet the vibration reduction requirements well in the complex marine environment. Among the existing intelligent damping vibration reduction devices, a technical solution is disclosed that uses electromagnetic control to control the movement of a spherical mass block to achieve intelligent damping regulation. See patent publication number CN117345555B. However, the technical solution disclosed in this patent does not achieve autonomous power supply for the vibration reduction system, which easily consumes the overall efficiency of the wind turbine.

[0005] Therefore, there is an urgent need to invent an electromagnetic rheological intelligent damping vibration reduction system for offshore wind power, to solve the problems of traditional vibration reduction systems having a single control direction, being unable to intelligently adjust the damping coefficient, and the inability of existing vibration reduction systems to provide independent power, thereby improving the adaptability of wind turbine vibration reduction systems to complex environments. Summary of the Invention

[0006] Based on this, this application provides an intelligent electromagnetic rheological damping vibration reduction device and an intelligent vibration reduction system for offshore wind power, which focuses on solving the problems of traditional vibration reduction systems having a single vibration reduction direction, being unable to adaptively adjust the damping coefficient, and being unable to supply energy autonomously.

[0007] To achieve the above objectives, the embodiments in this specification provide the following technical solutions: This application provides, in a first aspect, an intelligent electromagnetic rheological damping vibration reduction device applied inside a vibrating body, comprising: an intelligent damping rod, a limiting cylinder, a spherical mass block, a data acquisition and control module, and a sensor; the intelligent damping rod includes a magnetorheological fluid column and an electromagnetic solenoid; the two ends of the intelligent damping rod are respectively connected to the inner wall of the vibrating body and the outer wall of the limiting cylinder; a piezoelectric composite material layer is disposed on the inner wall of the limiting cylinder; the spherical mass block is disposed inside the limiting cylinder to achieve energy dissipation and vibration reduction through free rolling collision; the sensor is disposed on the inner wall of the vibrating body for monitoring the vibration of the vibrating body; the data acquisition and control module is used to acquire data from the piezoelectric composite material layer and the sensor and control the magnetic field strength of the electromagnetic solenoid in the intelligent damping rod to adjust the viscosity of the magnetorheological fluid in the magnetorheological fluid column, thereby achieving intelligent damping control.

[0008] Preferably, the intelligent damping rod is provided with spherical hinges at both ends, which are movably connected to the inner wall of the vibrating body and the outer wall of the limiting cylinder.

[0009] Preferably, the intelligent damping rod is arranged around the limiting cylinder at 90° intervals, with the center of the upper and lower surfaces of the limiting cylinder as the center.

[0010] Preferably, the intelligent damping rod includes an outer sliding sleeve, an inner cylinder, and a telescopic main shaft; the magnetorheological fluid column and the electromagnetic solenoid are disposed inside the inner cylinder, and the magnetorheological fluid column is filled with magnetorheological fluid; the telescopic main shaft passes through the inner cylinder and is connected to the outer sliding sleeve.

[0011] Furthermore, the intelligent damping rod also includes two water wheels disposed on the telescopic main shaft, and a return spring is disposed between the water wheels and the end of the magnetorheological fluid column to ensure that the telescopic main shaft can return to its state before compression after being compressed.

[0012] Preferably, a buffer limiting layer is provided at the end of the outer slidable sleeve to avoid rigid collision between the inner cylinder and the outer slidable sleeve.

[0013] Preferably, the bottom and sides of the inner surface of the limiting cylinder are piezoelectric composite material layers. The piezoelectric composite material layers are uniformly divided into multiple partitions. Each partition generates an electrical signal when it is subjected to collision and compression, and transmits it to the data acquisition and control module to monitor the position and vibration of the spherical mass block in real time.

[0014] This application provides a second aspect of an intelligent vibration reduction system for offshore wind power, comprising a wind turbine tower, an intelligent damping rod, a spherical hinge, a limiting cylinder, a spherical mass block, a data acquisition and control module, and sensors. The intelligent damping rod includes a magnetorheological fluid column and an electromagnetic solenoid. The two ends of the intelligent damping rod are connected to the inner wall of the wind turbine tower and the outer wall of the limiting cylinder respectively via the spherical hinge. A piezoelectric composite material layer is disposed on the inner wall of the limiting cylinder. The spherical mass block is disposed inside the limiting cylinder, achieving energy dissipation and vibration reduction through free rolling and collision. The sensors are disposed on the inner wall of the wind turbine tower to monitor vibration. The data acquisition and control module is used to acquire data from the piezoelectric composite material layer and the sensors, and to control the magnetic field strength of the electromagnetic solenoid in the intelligent damping rod to adjust the viscosity of the magnetorheological fluid in the magnetorheological fluid column, thereby achieving intelligent damping control.

[0015] Furthermore, the offshore wind power intelligent vibration reduction system also includes a suspension rod; the top of the limiting cylinder is connected to the top of the wind turbine tower by the suspension rod, and the suspension rod and the wind turbine tower are connected by a spherical hinge so that the limiting cylinder can swing freely. The suspension rod can extend and retract and the extension length can be adjusted according to the wind turbine vibration frequency; the intelligent damping rod is arranged around the upper and lower ends of the limiting cylinder at 90° intervals with the center of the upper and lower surfaces of the limiting cylinder as the center.

[0016] Preferably, the offshore wind power intelligent vibration reduction system further includes an energy storage device; the intelligent damping rod further includes an outer sliding sleeve, an inner cylinder, a telescopic main shaft, and two water turbines mounted on the telescopic main shaft; the magnetorheological fluid column and the electromagnetic solenoid are disposed inside the inner cylinder, and the magnetorheological fluid column is filled with magnetorheological fluid; the telescopic main shaft passes through the inner cylinder and is connected to the outer sliding sleeve; a return spring is provided between the water turbine and the end of the magnetorheological fluid column to ensure that the telescopic main shaft can return to its state before compression after being compressed, and continues to rotate under the fluid action of the magnetorheological fluid during the compression and recovery process of the telescopic main shaft; each water turbine is equipped with a power generation and transmission device to convert the kinetic energy of the water turbine during continuous rotation into electrical energy and collect it into the energy storage device to achieve self-sufficiency of the system.

[0017] Preferably, the data acquisition and control module and the energy storage device are welded to the inner wall of the wind turbine tower by a steel frame, and a buffer material protective layer is provided on the steel frame.

[0018] Preferably, the weight of the spherical mass block is 1%-4% of the total weight of the fan.

[0019] Preferably, the surface of the spherical mass block is coated with a friction-resistant composite material to reduce rolling damage.

[0020] Based on the above design, the beneficial effects of this application are: First, the spherical mass block of this application can roll freely 360° within the limiting cylinder to achieve collision energy dissipation and vibration reduction. The limiting cylinder, intelligent damping rod and wind turbine tower are all connected by spherical hinges, and each component can rotate freely, which can realize vibration control in all horizontal and vertical directions.

[0021] Secondly, the electrical signal data and sensor vibration data generated by collisions within the limiting cylinder provided in this application are both input into the data acquisition and control module for more precise real-time vibration analysis. The system will adjust the magnetic field strength within the intelligent damping rod based on the real-time vibration conditions, and adjust the damping coefficient of the intelligent damping rod by regulating the viscosity of the magnetorheological fluid, thereby achieving a semi-active adaptive vibration reduction effect.

[0022] Third, a water turbine is installed on the telescopic main shaft inside the intelligent damping rod provided in this application. When the intelligent damping rod extends or retracts, the water turbine will continuously rotate to generate electricity, store electrical energy to supply the system itself for operation, and realize self-sufficient intelligent vibration reduction. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the vibration damping device in this application; Figure 2 This is a top view of the overall structure of the vibration damping device in this application; Figure 3 This is a front sectional view of the overall structure of the vibration damping device in this application; Figure 4 This is a cross-sectional view of the smart damping rod in this application.

[0025] Reference numerals: 1. Wind turbine tower; 2. Intelligent damping rod; 3. Spherical hinge; 4. Limiting cylinder; 5. Spherical mass block; 6. Data processing and control module; 7. Suspension rod; 8. Energy storage device; 9. Sensor; 21. External sliding sleeve; 22. Inner cylinder; 23. Magnetorheological fluid column; 24. Electromagnetic solenoid; 25. Telescopic main shaft; 26. Water turbine; 27. Return spring; 28. Magnetorheological fluid; 29. ​​Buffer limiting layer; 41. Steel outer shell; 42. Piezoelectric composite material layer; 43. Zone. Detailed Implementation

[0026] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0027] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0029] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the elements related to this application and are not drawn according to the number, shape and size of the elements in actual implementation. In actual implementation, the form, quantity and proportion of each element can be arbitrarily changed, and the layout of the elements may also be more complex.

[0030] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0031] The magnetorheological fluid column mentioned in this specification is a device that uses the characteristic that the viscosity of a magnetorheological fluid changes rapidly under the action of an external magnetic field to control its mechanical behavior.

[0032] This specification provides an intelligent electromagnetic rheological damping vibration reduction device applied inside a vibrating body, comprising: an intelligent damping rod 2, a limiting cylinder 4, a spherical mass block 5, a data acquisition and control module 6, and a sensor 9; the intelligent damping rod includes a magnetorheological fluid column 23 and an electromagnetic solenoid 24; the two ends of the intelligent damping rod 2 are respectively connected to the inner wall of the vibrating body and the outer wall of the limiting cylinder 4; a piezoelectric composite material layer 42 is provided on the inner wall of the limiting cylinder 4; the spherical mass block 5 is disposed inside the limiting cylinder 4, achieving energy dissipation and vibration reduction through free rolling collision; the sensor 9 is disposed on the inner wall of the vibrating body for monitoring the vibration of the vibrating body; the data acquisition and control module 6 is used to collect data from the piezoelectric composite material layer 42 and the sensor 9 and control the magnetic field strength of the electromagnetic solenoid 24 in the intelligent damping rod 2 to adjust the viscosity of the magnetorheological fluid in the magnetorheological fluid column 23, thereby achieving intelligent damping control.

[0033] The basic principle of the above-mentioned basic technical solution is as follows: When the vibrating body vibrates, the intelligent electromagnetic rheological damping vibration reduction device starts to work. The sensor 9 monitors the real-time vibration signal of the vibrating body and transmits it to the data acquisition and control module 6. The spherical mass block 5 rolls in the limiting cylinder 4 in the opposite direction to the vibration direction of the vibrating body. The horizontal component of the pressure it exerts on the limiting cylinder 4 provides restoring force and damping force to the vibrating body. When the spherical mass block 5 rolls on the piezoelectric composite material layer 42 of the limiting cylinder 4, the piezoelectric composite material layer 42 generates current. The current signal is transmitted to the data acquisition and control module 6. The data acquisition and control module 6 combines the signal of the piezoelectric composite material layer 42 and the real-time vibration signal monitored by the sensor 9 to analyze the vibration of the vibrating body more accurately. The data acquisition and control module 6 adjusts the current in the electromagnetic solenoid 24 based on the vibration, thereby controlling the magnetic field strength in the magnetorheological fluid column 23. By adjusting the viscosity of the magnetorheological fluid 28, the damping coefficient of the intelligent damping rod 2 is controlled.

[0034] In one specific embodiment, the aforementioned intelligent electromagnetic rheological damping vibration reduction device is applied to an offshore wind turbine. In this specific application scenario, the vibrating body is the wind turbine tower 1, which is constructed from welded steel plates and is a cylindrical support and protective structure. Figure 1As shown, the wind turbine tower 1 also includes a spherical hinge 3, a suspension rod 7, and an energy storage device 8. The intelligent damping rod 2 is connected at both ends to the inner wall of the wind turbine tower 1 and the outer wall of the limiting cylinder 4 via the spherical hinge 3, allowing free rotation between the components. The sensor 9 is installed on the inner wall of the wind turbine tower 1 to monitor the vibration of the wind turbine. The limiting cylinder 4 is a closed cylinder, and a spherical mass block 5 is placed inside the cylindrical space of the limiting cylinder 4, allowing it to roll freely within the limiting cylinder 4. The top of the limiting cylinder 4 is connected to the top of the wind turbine tower 1 by the suspension rod 7, and the suspension rod 7 is connected to the wind turbine tower 1 by the spherical hinge 3, allowing free rotation between the limiting cylinder 4 and the wind turbine tower 1. The suspension rod 7 is freely movable and can extend and retract, with its extension length adjustable according to the wind turbine's vibration frequency. By installing a vibration damping device on the suspension rod 7, the intelligent electromagnetic rheological damping vibration reduction system can be installed near the top of the wind turbine tower 1, ensuring optimal vibration recovery force and damping force for optimal vibration reduction. The spherical hinge 3 is welded to the inner wall of the wind turbine tower 1, and also welded to the limiting cylinder 4. The intelligent damping rods 2 are arranged around the upper and lower ends of the limiting cylinder 4 at 90° intervals, with the centers of the upper and lower surfaces as the centers, resulting in a total of 8 intelligent damping rods 2. Figure 1 Only two rods around the upper perimeter and three rods around the lower perimeter of the limiting cylinder 4 are shown in the diagram. It should be understood that the arrangement and quantity of the intelligent damping rods 2, the suspension rods 7 and their connection with the wind turbine tower 1 and the limiting cylinder 4, and the energy storage device 8 in this specific embodiment are preferred technical details of the basic technical solution in this specification in a specific offshore wind power application scenario, and are not intended to be a strict limitation on the independent claims of this application.

[0035] In the above specific embodiments, the surface of a preferred spherical mass block 5 can be wrapped with an anti-friction composite material as needed to reduce rolling damage; another preferred embodiment is that the weight of the spherical mass block 5 is 1%-4% of the overall weight of the fan, at which point the control effect is optimal.

[0036] In the above specific embodiments, a preferred improved design is that the energy storage device 8 and the data processing and control module 6 are placed inside a steel frame and welded to the wind turbine tower 1, and a buffer material protective layer is set inside the steel frame to ensure stable operation of the device.

[0037] For detailed explanation Figure 1 The arrangement of the intelligent damping rod 2 in the illustrated embodiment is provided in this specification. Figure 2 The diagram shows a top view of the overall structure of the vibration damping device. The intelligent damping rod 2 and the ball joints 3 at both ends are arranged sequentially at 90° intervals along the side of the limiting cylinder 4 with the center of the upper and lower surfaces as the center. The outer shell of the intelligent damping rod 2 and the ball joints 3 are made of high-strength materials to cope with vibration impact.

[0038] Based on the above basic embodiments, this specification provides the following: Figure 3 The vibration damping device shown is a front cross-sectional view. Inside the limiting cylinder 4, a spherical mass block 5 is placed, which can roll freely within the cylinder. The limiting cylinder 4 has a steel outer shell 41, and its inner bottom and sides are piezoelectric composite material layers 42. These layers are evenly divided into multiple sections 43. Each section 43 generates an electrical signal when subjected to collision or compression, which is transmitted to the data acquisition and control module 6. This module monitors the position of the spherical mass block 5 in real time and the strain rate of the piezoelectric composite material layer 42 during vibration to calculate the acceleration of the spherical mass block 5, thus aiding in monitoring the fan vibration. It should be understood that... Figure 3 The 42-segmentation arrangement of the piezoelectric composite material layer shown is only a preferred design and is not intended to be a strict limitation of the independent claims.

[0039] To illustrate the structure of the intelligent damping rod 2 in this application in detail, this specification also provides, for example... Figure 4 The cross-sectional view of the intelligent damping rod shown indicates that the intelligent damping rod 2 consists of an outer sliding sleeve 21 and an inner cylinder 22. The inner cylinder 22 contains a magnetorheological fluid column 23 and an electromagnetic solenoid 24. The magnetorheological fluid column 23 is filled with a magnetorheological fluid 28. A telescopic main shaft 25 is installed inside the magnetorheological fluid column 23, passing through the inner cylinder 22 and connecting with the outer sliding sleeve 21. Two water wheels 26 are installed on the telescopic main shaft 25. A return spring 27 is installed between the water wheels 26 and the end of the magnetorheological fluid column 23 to ensure that the telescopic main shaft 25 can return to its initial state after each compression. A buffer limiting layer 29 is installed at the end of the outer telescopic sleeve 21 to avoid rigid collision between the inner cylinder 22 and the outer sliding sleeve 21. The water turbine 26 inside the intelligent damping rod 2 will move along the direction of the retractable main shaft 25 and continuously rotate to generate electricity while the intelligent damping rod 2 extends and retracts. The generated electricity is transmitted to the energy storage device 8 and supplied to the system itself. While further enhancing the vibration reduction effect, the system's self-sufficient power supply characteristics avoid interference with the wind turbine's energy storage.

[0040] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0041] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An intelligent electromagnetic rheological damping vibration reduction device, applied inside a vibrating body, characterized in that, include: Intelligent damping rod (2), limiting cylinder (4), spherical mass block (5), data acquisition and control module (6) and sensor (9); The intelligent damping rod (2) includes a magnetorheological fluid column (23) and an electromagnetic solenoid (24). The two ends of the intelligent damping rod (2) are respectively connected to the inner wall of the vibrating body and the outer wall of the limiting cylinder (4); The inner wall of the limiting cylinder (4) is provided with a piezoelectric composite material layer (42); The spherical mass block (5) is disposed inside the limiting cylinder (4) to achieve energy dissipation and vibration reduction by free rolling collision; The sensor (9) is disposed on the inner wall of the vibrating body and is used to monitor the vibration of the vibrating body; The data acquisition and control module (6) is used to acquire data from the piezoelectric composite material layer (42) and the sensor (9) and control the magnetic field strength of the electromagnetic solenoid (24) in the intelligent damping rod (2) to adjust the viscosity of the magnetorheological fluid in the magnetorheological fluid column (23) and realize intelligent damping control.

2. The intelligent electromagnetic rheological damping vibration reduction device according to claim 1, characterized in that, The intelligent damping rod (2) is provided with spherical hinges (3) at both ends, and is movably connected to the inner wall of the vibrating body and the outer wall of the limiting cylinder (4) through the spherical hinges (3).

3. The intelligent electromagnetic rheological damping vibration reduction device according to claim 1, characterized in that, The intelligent damping rod (2) is arranged around the center of the upper and lower surfaces of the limiting cylinder (4) at 90° intervals.

4. The intelligent electromagnetic rheological damping vibration reduction device according to claim 1, characterized in that, The intelligent damping rod (2) includes an outer sliding sleeve (21), an inner cylinder (22), and a telescopic main shaft (25). The magnetorheological fluid column (23) and the electromagnetic solenoid (24) are disposed inside the inner cylinder (22), and the magnetorheological fluid column (23) is filled with magnetorheological fluid (28). The retractable main shaft passes through the inner cylinder (22) and is connected to the outer sliding sleeve (21).

5. The intelligent electromagnetic rheological damping vibration reduction device according to claim 4, characterized in that, The intelligent damping rod (2) also includes two water wheels (26) set on the telescopic main shaft (25). A reset spring (27) is set between the water wheel (26) and the end of the magnetorheological fluid column (23) to ensure that the telescopic main shaft (25) can return to its state before compression after being compressed.

6. The intelligent electromagnetic rheological damping vibration reduction device according to claim 4, characterized in that, The outer sliding sleeve (21) is provided with a buffer limiting layer (29) at its end to avoid rigid collision between the inner cylinder (22) and the outer sliding sleeve (21).

7. The intelligent electromagnetic rheological damping vibration reduction device according to claim 1, characterized in that, The bottom and sides of the inner surface of the limiting cylinder (4) are piezoelectric composite material layers (42). The piezoelectric composite material layers (42) are evenly divided into multiple partitions (43). Each partition (43) generates an electrical signal when it is subjected to collision and compression and transmits it to the data acquisition and control module (6) to monitor the position and vibration of the spherical mass block (5) in real time.

8. A smart vibration reduction system for offshore wind power, characterized in that, It includes a wind turbine tower (1), an intelligent damping rod (2), a spherical hinge (3), a limiting cylinder (4), a spherical mass block (5), a data acquisition and control module (6), and a sensor (9); The intelligent damping rod includes a magnetorheological fluid column (23) and an electromagnetic solenoid (24). The intelligent damping rod (2) is connected at both ends to the inner wall of the wind turbine tower (1) and the outer wall of the limiting cylinder (4) respectively through ball joints (3); The inner wall of the limiting cylinder (4) is provided with a piezoelectric composite material layer (42); The spherical mass block (5) is disposed inside the limiting cylinder (4) to achieve energy dissipation and vibration reduction by free rolling collision; The sensor (9) is installed on the inner wall of the wind turbine tower (1) to monitor vibration. The data acquisition and control module (6) is used to acquire data from the piezoelectric composite material layer (42) and the sensor (9) and control the magnetic field strength of the electromagnetic solenoid (24) in the intelligent damping rod (2) to adjust the viscosity of the magnetorheological fluid in the magnetorheological fluid column (23) and realize intelligent damping control.

9. The intelligent vibration reduction system for offshore wind power according to claim 8, characterized in that, It also includes the suspension rod (7); The top of the limiting cylinder (4) is connected to the top of the wind turbine tower (1) by a suspension rod (7). The suspension rod (7) and the wind turbine tower (1) are connected by a spherical hinge (3) so that the limiting cylinder (4) can swing freely. The suspension rod (7) can extend and retract and the extension length can be adjusted according to the vibration frequency of the wind turbine. The intelligent damping rod (2) is arranged around the upper and lower ends of the limiting cylinder (4) at 90° intervals, with the center of the upper and lower surfaces of the limiting cylinder (4) as the center.

10. The intelligent vibration reduction system for offshore wind power according to claim 8, characterized in that, The offshore wind power intelligent vibration reduction system also includes an energy storage device (8). The intelligent damping rod (2) also includes an outer sliding sleeve (21), an inner cylinder (22), a telescopic main shaft (25), and two waterwheels (26) mounted on the telescopic main shaft (25). The magnetorheological fluid column (23) and the electromagnetic solenoid (24) are disposed inside the inner cylinder (22), and the magnetorheological fluid column (23) is filled with magnetorheological fluid (28). The retractable main shaft passes through the inner cylinder (22) and is connected to the outer sliding sleeve (21); A reset spring (27) is provided between the water wheel (26) and the end of the magnetorheological fluid column (23) to ensure that the telescopic spindle (25) can be restored to its state before compression after being compressed, and will continue to rotate under the action of the magnetorheological fluid (28) during the compression and recovery process of the telescopic spindle (25). Each of the water turbines (26) is equipped with a power generation and transmission device to convert the kinetic energy generated during the continuous rotation of the water turbine (26) into electrical energy and collect it into the energy storage device (8) so as to realize the system's self-sufficiency in power supply.

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