Self-energy-supply damping device for offshore booster station

Abstract

The invention discloses a self-powered vibration damper for an offshore booster station, which relates to the technical field of vibration control of offshore wind power engineering structures and comprises a shell, a particle damping unit, a magneto-rheological damping unit, an energy storage and supply unit and a control unit, and the particle damping unit, the magneto-rheological damping unit, the energy storage and supply unit and the control unit are arranged in the shell. The particle damping unit comprises a plurality of vertically distributed particle damping cavities, and pistons, spherical particles and piezoelectric material layers are arranged in the particle damping cavities; the magneto-rheological damping unit is connected with the particle damping unit and the shell through the mass block, the spring and the magneto-rheological damper. The energy storage and supply unit stores the electric energy generated by the piezoelectric material layer and supplies power; and the control unit adjusts the damping force of the magnetorheological damper according to a signal of the vibration sensor. Broadband efficient vibration reduction is achieved through a composite energy dissipation mechanism, self power supply is achieved through vibration energy, and the safety and durability of the offshore booster station in the complex marine environment are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of vibration control technology for offshore wind power engineering structures, and in particular to a self-powered vibration reduction device for offshore substations. Background Technology

[0002] Offshore substations serve as the core hubs for the collection and transmission of electricity from offshore wind farms. Their steel jacket foundations and superstructures are subjected to dynamic environmental loads such as wind, waves, and currents over extended periods. Simultaneously, the operation of internal electrical equipment (such as transformers and generators) induces mechanical vibrations. These vibration effects couple with the natural frequencies of the substation structure, easily leading to structural fatigue damage, loosening of connection nodes, and low-frequency noise radiation. This not only threatens the overall stability and safe lifespan of the substation but also poses potential risks to the marine ecological environment and the health of maintenance personnel. Existing research indicates that the vibration intensity at higher levels of the substation is significantly greater than at lower levels, and the vibration of electromechanical equipment has a particularly pronounced impact on local structures, requiring targeted control.

[0003] Current vibration control technology for offshore substations primarily relies on passive or active dampers. While passive dampers (such as viscous dampers and tuned mass dampers) are simple in structure and require no external power source, they have a narrow damping bandwidth and poor adaptability to low-frequency wave excitation and equipment vibration. Active dampers (such as active mass dampers) offer high control precision, but they depend on a continuous external power supply, making it difficult to guarantee power supply stability in harsh marine environments. Furthermore, the systems are complex and have high operation and maintenance costs. In addition, traditional dampers mainly focus on vibration reduction and lack the ability to recover and utilize vibration energy. Summary of the Invention

[0004] The purpose of this invention is to provide a self-powered vibration reduction device for offshore substations, so as to solve the problems existing in the prior art and improve the vibration reduction effect of offshore substations.

[0005] To achieve the above objectives, the present invention provides the following solution: This invention provides a self-powered vibration reduction device for offshore substations, comprising: case; The particle damping unit comprises multiple particle damping cavities arranged vertically and fixedly disposed within a housing. Each particle damping cavity contains a slidably disposed piston. Any two adjacent pistons are fixedly connected by a vertical connecting rod. The housing is provided with a groove corresponding to each vertical connecting rod, and the vertical connecting rod slides into the corresponding groove. The length directions of all particle damping cavities and all grooves are parallel to each other. Each particle damping cavity contains multiple spherical particles. A piezoelectric material layer is disposed on the inner wall of each particle damping cavity. A magnetorheological damping unit includes a mass block, a magnetorheological damper, and several springs. The particle damping unit, the mass block, and the magnetorheological damper are distributed sequentially along the length of the particle damping cavity. One end of the mass block near the particle damping unit is fixedly connected to a piston via a horizontal connecting rod. The other end of the mass block is connected to the inner wall of the housing via the magnetorheological damper and the springs. Each magnetorheological damper and each spring is fixedly connected at one end to the mass block and at the other end to the inner wall of the housing. An energy storage and power supply unit, wherein the energy storage and power supply unit includes an energy storage device; The control unit includes a controller and a vibration sensor fixedly mounted on the housing. The vibration sensor, the energy storage device, and the magnetorheological damper are respectively signal-connected to the controller. The energy storage device is used to supply power to the magnetorheological damper and the control unit. The controller is used to adjust the magnitude of the current applied by the energy storage device to the coil in the magnetorheological damper according to the detection value of the vibration sensor.

[0006] Preferably, the energy storage device is a rechargeable battery.

[0007] Preferably, all of the pistons are located in the same vertical plane.

[0008] Preferably, each piston divides the corresponding particle damping cavity into two sub-cavities.

[0009] Preferably, a guide rail parallel to the length direction of the particle damping cavity is fixedly installed inside the housing, and a roller that rolls with the guide rail is provided at the bottom end of the mass block.

[0010] Preferably, there are two springs, and the magnetorheological damper is located between the two springs.

[0011] Preferably, the energy storage and power supply unit further includes a power distribution device, which includes a power management unit, a multi-channel voltage output module, and a dual-power switching relay. One input terminal of the dual-power switching relay is electrically connected to the output terminal of the energy storage device, and the other input terminal is electrically connected to the output terminal of an external power source. The output terminal of the dual-power switching relay is electrically connected to the input terminal of the power management unit, and the output terminal of the power management unit is electrically connected to the input terminal of the multi-channel voltage output module. The vibration sensor, the controller, and the magnetorheological damper are respectively electrically connected to the output terminal of the multi-channel voltage output module.

[0012] Preferably, the power distribution device further includes a protection circuit electrically connected to the power management unit.

[0013] Preferably, a sound-absorbing layer is applied to the outer wall of the housing, and the material of the sound-absorbing layer is POZD coating; multiple parallel and spaced grooves are provided on the side of the sound-absorbing layer away from the housing; the vibration sensor is fixedly mounted on the sound-absorbing layer.

[0014] Preferably, a buffer layer is further sandwiched between the sound-absorbing layer and the piezoelectric material layer, and the material of the buffer layer is a buffer material.

[0015] The present invention achieves the following technical effects compared to the prior art: The self-powered vibration reduction device for offshore substations of this invention achieves effective vibration control of offshore substations through the coordinated operation of a particle damping unit and a magnetorheological damping unit. The particle damping unit utilizes the energy dissipation through collisions and friction between particles, effectively suppressing high-frequency vibrations (such as mechanical vibrations of equipment); while the magnetorheological damping unit, by adjusting the damping force, exhibits excellent adaptability to low-frequency wave excitation. This composite design overcomes the problem of narrow vibration reduction bandwidth in traditional passive dampers, effectively coping with wide-frequency environmental loads such as wind, waves, and currents at sea, reducing the risk of structural fatigue damage, and extending the service life of the substation. In particular, designing the particle damping unit as a structure of multiple particle damping cavities, and connecting the pistons within each particle damper through vertical connecting rods, improves energy dissipation efficiency and further enhances vibration reduction efficiency, enabling the device to adapt to vibration inputs of different intensities and maintain stable vibration reduction performance even under harsh sea conditions. The self-powered vibration damping device for offshore substations of this invention combines vibration energy recovery with active control. It converts mechanical vibration energy into electrical energy through a piezoelectric material layer and stores it in an energy storage device to power the magnetorheological damper and control unit. This self-powered design solves the problem of poor external power supply stability in traditional active control systems in marine environments. Compared with traditional active dampers that require continuous external power supply, this device can maintain stable operation even in harsh sea conditions, reducing dependence on the offshore power grid and lowering maintenance costs and failure risks.

[0016] Furthermore, the control unit monitors the vibration state in real time through vibration sensors. The controller dynamically adjusts the damping characteristics of the magnetorheological damper based on the detected values ​​to achieve adaptive vibration reduction. This control strategy enables the device to accurately respond to vibration characteristics under different sea conditions and operating states, always maintaining optimal vibration reduction. This invention integrates energy recovery and vibration control functions, reducing investment in external power supply facilities, lowering the overall lifecycle maintenance costs of offshore substations, and ensuring stable operation of precision electrical equipment within the substation. The excellent vibration reduction effect helps guarantee the stable operation of precision electrical equipment within the substation, reduces equipment failures caused by vibration, and improves the overall reliability of offshore wind farms. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the self-powered vibration reduction device for offshore substations according to the present invention; Figure 2 This is a partial structural schematic diagram of the self-powered vibration reduction device for offshore substations according to the present invention. In the diagram: 1. Sound-absorbing layer; 2. Shell; 3. Piston; 4. Particle damping cavity; 5. Buffer layer; 6. Piezoelectric material layer; 7. Spherical particles; 8. Mass block; 9. Spring; 10. Magnetorheological damper; 11. Guide rail; 12. Energy storage device; 13. Power distribution device; 14. Vibration sensor; 15. Controller; 16. High-strength bolt; 301. Vertical connecting rod. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The purpose of this invention is to provide a self-powered vibration reduction device for offshore substations, so as to solve the problems existing in the prior art and improve the vibration reduction effect of offshore substations.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figures 1 to 2 As shown, this embodiment provides a self-powered vibration damping device for offshore substations, comprising: Casing 2; The particle damping unit comprises multiple particle damping cavities 4 arranged vertically and fixedly disposed within the housing 2. Each particle damping cavity 4 has a piston 3 slidably disposed therein. Any two adjacent pistons 3 are fixedly connected by a vertical connecting rod 301. The housing 2 is provided with a sliding groove corresponding to each vertical connecting rod 301. The vertical connecting rod 301 slides in cooperation with the corresponding sliding groove. The length directions of all particle damping cavities 4 and all sliding grooves are parallel to each other. Each particle damping cavity contains multiple spherical particles 7. The inner wall of each particle damping cavity is provided with a piezoelectric material layer 6. The magnetorheological damping unit includes a mass block 8, a magnetorheological damper 10, and several springs 9. The particle damping unit, the mass block 8, and the magnetorheological damper 10 are distributed sequentially along the length of the particle damping cavity 4. One end of the mass block 8 near the particle damping unit is fixedly connected to a piston 3 via a horizontal connecting rod. The other end of the mass block 8 is connected to the inner wall of the housing 2 via the magnetorheological damper 10 and the springs 9. The magnetorheological damper 10 and each spring 9 are fixedly connected at one end to the mass block 8 and at the other end to the inner wall of the housing 2. An energy storage and power supply unit, which includes an energy storage device 12; The control unit includes a controller 15 and a vibration sensor 14 fixedly mounted on the housing 2. The vibration sensor 14, the energy storage device 12, and the magnetorheological damper 10 are respectively connected to the controller 15 via signals. The energy storage device 12 is used to supply power to the magnetorheological damper 10 and the control unit. The controller 15 is used to adjust the magnitude of the current applied by the energy storage device 12 to the coil in the magnetorheological damper 10 according to the detection value of the vibration sensor 14.

[0023] In the optional embodiments of this example, the energy storage device 12 preferably uses a rechargeable battery.

[0024] In the optional schemes of this embodiment, it is more preferred that all pistons 3 are located in the same vertical plane.

[0025] In the optional scheme of this embodiment, it is more preferred that each piston 3 divides the corresponding particle damping cavity 4 into two sub-cavities.

[0026] In the optional scheme of this embodiment, a more preferred option is that a guide rail 11 parallel to the length direction of the particle damping cavity 4 is fixedly provided inside the housing 2, and a roller that rolls with the guide rail 11 is provided at the bottom end of the mass block 8. The cooperation between the guide rail 11 and the roller ensures the stability of the movement of the mass block 8.

[0027] In the optional embodiments of this example, it is more preferred that there are two springs 9, and the magnetorheological damper 10 is located between the two springs 9.

[0028] In an optional embodiment, more preferably, the energy storage and power supply unit further includes a power distribution device 13. The power distribution device 13 includes a power management unit, a multi-channel voltage output module, and a dual-power switching relay. One input terminal of the dual-power switching relay is electrically connected to the output terminal of the energy storage device 12, and the other input terminal is electrically connected to the output terminal of an external power source. The output terminal of the dual-power switching relay is electrically connected to the input terminal of the power management unit. The output terminal of the power management unit is electrically connected to the input terminal of the multi-channel voltage output module. The vibration sensor 14, the controller 15, and the magnetorheological damper 10 are respectively electrically connected to the output terminal of the multi-channel voltage output module.

[0029] In an optional embodiment, more preferably, the power distribution device 13 further includes a protection circuit electrically connected to the power management unit.

[0030] In a preferred embodiment, the outer wall of the housing 2 is covered with a sound-absorbing layer 1, which is made of POZD coating. Multiple parallel and spaced grooves are provided on the inner wall of the sound-absorbing layer 1 away from the particle damping cavity 4. These grooves induce sound wave scattering and broaden the sound absorption frequency band. This embodiment forms the sound-absorbing layer 1 by spraying POZD coating and uses a groove structure on the sound-absorbing layer 1 for noise reduction. Through broadband noise attenuation and sound wave scattering principles, the noise during device operation is effectively reduced, overcoming the high noise deficiency of existing particle dampers.

[0031] In this embodiment, more specifically, the sound-absorbing layer 1 has a thickness of 5 mm, a groove depth of 2 mm, and a spacing of 10 mm between two adjacent grooves.

[0032] In the optional embodiments of this example, a buffer layer 5 is preferably sandwiched between the inner wall of the particle damping cavity 4 and the piezoelectric material layer 6, and the material of the buffer layer 5 is a buffer material.

[0033] The specific working principle of the self-powered vibration reduction device for the offshore substation in this embodiment is as follows: In use, the housing 2 is fixedly installed on the offshore booster station using high-strength bolts 16. When the offshore booster station vibrates, the housing 2 vibrates accordingly, causing the mass block 8 inside the housing 2 to slide along the guide rail 11. When the mass block 8 slides, it drives each piston 3 to move together through the horizontal connecting rod. The reciprocating motion of the piston 3 dynamically adjusts the size of the two sub-cavities in the particle damping cavity, causing the spherical particles to generate periodic and intense collisions and frictions during the change of the sub-cavity volume. This significantly enhances the inelastic collision frequency and contact area between spherical particles and between spherical particles and the piezoelectric material layer 6, thereby effectively improving the energy dissipation performance of the particle damper under different operating conditions and achieving efficient dissipation of vibration energy. When the piezoelectric material layer 6 is impacted by the spherical particles, it generates electrical energy, which is stored in the energy storage device 12, thereby realizing the conversion of "vibration energy to electrical energy" and reducing dependence on external power supply. The power distribution device 13 prioritizes the use of the energy storage device 12 for power supply, and switches to the booster station's backup power supply (i.e., external power supply) when the energy storage device 12 is insufficient. When the offshore substation causes the shell 2 to vibrate at low frequency, the vibration sensor 14 detects and collects the vibration signal of the shell 2 (i.e., the offshore substation) and feeds it back to the controller 15. The acceleration sensor 17 detects and collects the acceleration of the mass block 8 and feeds it back to the controller 15. The controller 15 receives the signals from the vibration sensor 14 and the acceleration sensor 17, and controls the power distribution device 13 to apply current to the magnetorheological damper 10 according to the built-in algorithm. By applying different magnitudes of current to the excitation coil in the magnetorheological damper 10, the magnitude of the magnetic field applied by the excitation coil to the magnetorheological fluid is changed, thereby changing the damping force generated by the magnetization of the magnetorheological fluid. The controller 15 controls the damping of the magnetorheological damper 10 in real time to adjust the frequency of the mass block 8 to match the instantaneous frequency of the offshore substation, maximizing the conversion of the vibration energy of the offshore substation into the mechanical energy of the mass block 8 for consumption. The specific method of the controller 15 for processing and calculating the collected data is not part of the technical problem to be solved by this invention, and belongs to the prior art known to those skilled in the art, and will not be described in detail here. The reciprocating motion of mass block 8 also cancels out energy; at the same time, the reciprocating motion of piston 3 driven by mass block 8 also dissipates energy through friction, and piston 3 moves in the particle damping cavity, changing the volume of the particle cavity and causing particle movement, which further reduces vibration through particle damping; when the offshore booster station drives the shell 2 to vibrate at high frequency, the particles in the particle cavity collide and dissipate kinetic energy through friction, and piston 3 moves in the particle cavity, dissipating energy through friction while changing the volume of the particle cavity, intensifying particle movement and enhancing mid-to-high frequency collision loss.

[0034] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A self-powered vibration damping device for an offshore substation, characterized in that, include: case; The particle damping unit comprises multiple particle damping cavities arranged vertically and fixedly disposed within a housing. Each particle damping cavity contains a slidably disposed piston. Any two adjacent pistons are fixedly connected by a vertical connecting rod. The housing is provided with a groove corresponding to each vertical connecting rod, and the vertical connecting rod slides into the corresponding groove. The length directions of all particle damping cavities and all grooves are parallel to each other. Each particle damping cavity contains multiple spherical particles. A piezoelectric material layer is disposed on the inner wall of each particle damping cavity. A magnetorheological damping unit includes a mass block, a magnetorheological damper, and several springs. The particle damping unit, the mass block, and the magnetorheological damper are distributed sequentially along the length of the particle damping cavity. One end of the mass block near the particle damping unit is fixedly connected to a piston via a horizontal connecting rod. The other end of the mass block is connected to the inner wall of the housing via the magnetorheological damper and the springs. Each magnetorheological damper and each spring is fixedly connected at one end to the mass block and at the other end to the inner wall of the housing. An energy storage and power supply unit, wherein the energy storage and power supply unit includes an energy storage device; The control unit includes a controller and a vibration sensor fixedly mounted on the housing. The vibration sensor, the energy storage device, and the magnetorheological damper are respectively signal-connected to the controller. The energy storage device is used to supply power to the magnetorheological damper and the control unit. The controller is used to adjust the magnitude of the current applied by the energy storage device to the coil in the magnetorheological damper according to the detection value of the vibration sensor.

2. The self-powered vibration damping device for offshore substations according to claim 1, characterized in that: The energy storage device uses a rechargeable battery.

3. The self-powered vibration damping device for offshore substations according to claim 1, characterized in that: All of the pistons are located in the same vertical plane.

4. The self-powered vibration damping device for offshore substations according to claim 1, characterized in that: Each piston divides the corresponding particle damping cavity into two sub-cavities.

5. The self-powered vibration damping device for offshore substations according to claim 1, characterized in that: The housing is fixedly provided with a guide rail parallel to the length direction of the particle damping cavity, and the bottom end of the mass block is provided with a roller that rolls with the guide rail.

6. The self-powered vibration damping device for offshore substations according to claim 1, characterized in that: The number of springs is two, and the magnetorheological damper is located between the two springs.

7. The self-powered vibration damping device for offshore substations according to claim 1, characterized in that: The energy storage and power supply unit also includes a power distribution device, which includes a power management unit, a multi-channel voltage output module, and a dual-power switching relay. One input terminal of the dual-power switching relay is electrically connected to the output terminal of the energy storage device, and the other input terminal is electrically connected to the output terminal of an external power source. The output terminal of the dual-power switching relay is electrically connected to the input terminal of the power management unit, and the output terminal of the power management unit is electrically connected to the input terminal of the multi-channel voltage output module. The vibration sensor, the controller, and the magnetorheological damper are respectively electrically connected to the output terminal of the multi-channel voltage output module.

8. The self-powered vibration damping device for offshore substations according to claim 7, characterized in that: The power distribution device also includes a protection circuit electrically connected to the power management unit.

9. The self-powered vibration damping device for offshore substations according to claim 1, characterized in that: The outer wall of the housing is covered with a sound-absorbing layer, the material of which is POZD coating; the side of the sound-absorbing layer away from the housing has a plurality of parallel and spaced grooves; the vibration sensor is fixedly mounted on the sound-absorbing layer.

10. The self-powered vibration damping device for offshore substations according to claim 9, characterized in that: A buffer layer is also sandwiched between the inner wall of the particle damping cavity and the piezoelectric material layer, and the material of the buffer layer is a buffer material.

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