Passive damping device, floating platform and floating fan system

Abstract

The invention discloses a passive damping device, a floating platform and a floating fan system, and the passive damping device comprises a cantilever supporting part which is configured to be connected to a stand column; one end of the damping plate is connected to the cantilever supporting piece through a rotating shaft, the damping plate is configured to swing between a first limit position and a second limit position along the rotating shaft, and the projection, located at the first limit position, of the damping plate on the horizontal plane is a first projection; the projection of the damping plate in the second limit position on the horizontal plane is a second projection, the area of the first projection is larger than that of the second projection, and the second limit position is located on the lower side of the first limit position. The damping plate is connected to the cantilever supporting piece through a rotating shaft, so that the damping plate can swing between a first limit position and a second limit position. The damping plate can increase the additional mass and damping of heaving and transverse pitching motion of the floating platform, and has an inhibiting effect on heaving and transverse pitching of the floating platform.

Description

Technical Field

[0001] The present application relates to the technical field of offshore wind turbine equipment, and more specifically, to a passive damping device, a floating platform, and a floating wind turbine system. Background Art

[0002] Offshore wind power technology, which uses wind turbines to convert wind energy from the ocean surface into electricity, has developed rapidly in recent years. Wind turbines are installed on floating platforms and anchored to the seabed via mooring systems.

[0003] When operating at sea, floating wind turbines are subject to a variety of environmental loads, including wind, waves, and currents. These loads can cause significant oscillations (heave, pitch, and roll) on the platform. These oscillations not only affect the turbine's power generation efficiency but can also pose a serious threat to its safety and stability.

[0004] Therefore, how to effectively suppress the oscillation of floating wind turbines and improve their stability in complex marine environments is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the object of this application is to provide a passive damping device to effectively suppress the oscillation of a floating wind turbine and improve its stability in a complex marine environment; Another object of the present application is to provide a floating platform and a floating wind turbine system.

[0006] To achieve the above objectives, this application provides the following technical solutions: A first aspect of the present application provides a passive damping device for installation on a column of a floating platform, the passive damping device comprising: a cantilever support configured to be connected to the column; A damping plate, one end of which is connected to the cantilever support via a rotating shaft, and the damping plate is configured to swing along the rotating shaft between a first extreme position and a second extreme position, the projection of the damping plate in the first extreme position on the horizontal plane is a first projection, and the projection of the damping plate in the second extreme position on the horizontal plane is a second projection, the area of ​​the first projection is greater than the area of ​​the second projection, and the second extreme position is located below the first extreme position.

[0007] In a possible implementation, the passive damping device further includes a damping plate reset elastic member, and the damping plate reset elastic member is configured to drive the damping plate to rotate toward the first extreme position.

[0008] In a possible implementation, the passive damping device further includes: a detection device, disposed on the cantilever support and / or the rotating shaft, outputting a first signal when the detection device moves downward, and outputting a second signal when the detection device moves upward in the water; A locking pin device locks the damping plate at the first limit position when the detection device outputs a first signal, and releases the locking of the damping plate when the detection device outputs a second signal.

[0009] In a possible implementation, a locking groove for cooperating with the locking pin device is provided on the rotating shaft, and when the damping plate is in the first extreme position, the locking groove of the rotating shaft corresponds to the locking pin device.

[0010] In a possible implementation, the detection device includes a valve body device and a position sensor, and the valve body device includes: A valve body shell and a rotating shaft shell, wherein the valve body shell is connected to the rotating shaft shell, and the rotating shaft is rotatably arranged in the rotating shaft shell, the valve body shell is provided with a valve cavity which passes through from top to bottom, and the locking pin device is provided on the rotating shaft shell; The valve core and the reset elastic member are both arranged in the valve cavity, the reset elastic member is used to drive the valve core to move upward, and the position sensor is used to detect the position of the valve core. When the valve core moves downward to avoid the position sensor, the second signal is output, and when the valve core blocks the position sensor, the first signal is output.

[0011] In a possible implementation, the damping plate is connected to the rotating shaft via a connecting arm, and a limiting groove for inserting the connecting arm is provided on the rotating shaft housing; Along the swinging direction of the connecting arm, the limiting groove includes a first limiting wall and a second limiting wall arranged opposite to each other. When the connecting arm abuts against the first limiting wall, the damping plate is in the first limit position. When the connecting arm abuts against the second limiting wall, the damping plate is in the second limit position.

[0012] In one possible implementation, the valve body device also includes a limit support plate, which is provided with a water hole that passes through the wall thickness. The limit support plate is positioned in the valve cavity, and one end of the reset elastic member is connected to the valve core, and the other end is connected to the limit support plate.

[0013] In a possible implementation, the rotating shaft is provided at an end of the cantilever support member away from the column.

[0014] The passive damping device provided in this application is mounted on a column via a cantilever support member connected to the column. A damping plate is connected to the cantilever support member via a rotating shaft, allowing the damping plate to swing between a first extreme position and a second extreme position. The damping plate can increase the additional mass and damping of the heave and pitch motions of the floating platform, thereby suppressing these motions.

[0015] The damping plate can adjust its posture according to the vertical movement of the floating platform, achieving two-way optimization of resistance. When the floating platform moves underwater, the damping plate is pushed upward by the water pressure, causing the damping plate to rotate to the first extreme position. Since the first extreme position has a larger projected area on the horizontal plane, it has greater damping, which can effectively slow the sinking speed of the floating platform. When the floating platform moves upward in the water, the damping plate is pushed downward by the water pressure, causing the damping plate to rotate to the second extreme position. Since the second extreme position has a smaller projected area on the horizontal plane, it has less damping, making it easier for the floating platform to float up and quickly return to its initial equilibrium position. In other words, during the process of the floating platform returning to equilibrium, the resistance or torque generated by the damping plate is small, causing less interference with the floating platform's recovery process.

[0016] A second aspect of the present application provides a floating platform, comprising a column and a passive damping device as described above, which is arranged on the column.

[0017] In a possible implementation, there are multiple passive damping devices on each column, and the passive damping devices are arranged around the column.

[0018] In a possible implementation, the passive damping device on each column surrounds at least half a circumference of the column.

[0019] In a possible implementation, there are three columns, the three columns are evenly arranged around a center line, and the passive damping device on each column is arranged on a side away from the center line.

[0020] In a possible implementation, a limiting portion is provided on the column, and the limiting portion is used to limit a first extreme position of the damping plate.

[0021] In a possible implementation, the cantilever support members are provided on both sides of the damping plate.

[0022] In a possible implementation, the passive damping device is arranged above the waterline of the column.

[0023] The floating platform provided in this application has all the technical effects of the above-mentioned passive damping device because it has the above-mentioned passive damping device, which will not be described in detail in this article.

[0024] A third aspect of the present application provides a floating wind turbine system, comprising the floating platform as described in any one of the above items.

[0025] The floating wind turbine system provided in this application has all the technical effects of the above-mentioned floating platform, and therefore will not be described in detail in this article. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 This is a schematic structural diagram of the floating platform disclosed in the embodiment of this application; Figure 2 This is a front view of the first rotation process of the floating platform disclosed in an embodiment of the present application; Figure 3 This is a front view of the second rotation process of the floating platform disclosed in an embodiment of the present application; Figure 4 This is a front view of the floating platform during the first heave process disclosed in an embodiment of the present application; Figure 5 This is a structural schematic diagram of the floating platform heave process 1 disclosed in an embodiment of the present application; Figure 6 This is a front view of the second heave process of the floating platform disclosed in an embodiment of the present application; Figure 7 This is a structural schematic diagram of the second heave process of the floating platform disclosed in an embodiment of the present application; Figure 8 This is a schematic structural diagram of the passive damping device disclosed in an embodiment of the present application; Figure 9 A perspective view of a damping plate of a passive damping device disclosed in an embodiment of the present application at a first extreme position; Figure 10 A perspective view of the damping plate of the passive damping device disclosed in an embodiment of the present application at a second extreme position; Figure 11 A top view of the valve body device disclosed in an embodiment of the present application; Figure 12 A perspective view of a valve body device disclosed in an embodiment of the present application; Figure 13 This is a schematic structural diagram of the valve core assembly disclosed in an embodiment of the present application.

[0028] The meanings of the reference numerals in the figures are as follows: 100 - Passive damping device; 110 - Cantilever support member; 120 - Damping plate; 130 - Valve body assembly; 131 - Valve body housing; 132 - Valve core; 133 - Reset elastic member; 134 - Position sensor; 135 - Rotating shaft housing; 1351 - Limiting groove; 136 - Limiting support plate; 1361 - Water hole; 140 - Rotating shaft; 150 - Limiting portion; 200-column; 300-Connecting rod. DETAILED DESCRIPTION

[0029] The embodiment of the present application discloses a passive damping device to effectively suppress the oscillation of a floating wind turbine and improve its stability in a complex marine environment; The embodiments of the present application also disclose a floating platform and a floating wind turbine system having the above-mentioned passive damping device.

[0030] The following describes the embodiments with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the content of the application described in the claims. Furthermore, the entire contents of the configurations represented by the following embodiments are not limited to those necessary for the solution of the application described in the claims. It should be noted that, for ease of description, only the portions related to the relevant application are shown in the accompanying drawings. The embodiments and features in the embodiments of this application may be combined with each other unless there is a conflict.

[0031] In the field of offshore floating wind turbines, damping devices are currently installed on floating platforms to suppress their oscillations (including heave, roll, and pitch). The primary purpose of these damping devices is to reduce the amplitude of oscillations by increasing the hydrodynamic damping of the floating platform, thereby improving the stability of the floating platform and the power generation efficiency of the wind turbine. The most common damping device currently used is the heave plate.

[0032] Heave plates are a common device used to increase hydrodynamic damping on floating platforms and are widely used on semi-submersible platforms. They are typically installed below the waterline at the base of the platform's columns. They are typically flat or curvature-shaped. The size of the heave plate is optimized based on the platform's specific design and the desired damping effect. Heave plates are generally large to maximize their contact area with the water flow. They are secured to the columns by welding or bolting, ensuring robustness and stability in complex marine environments.

[0033] When a floating platform experiences heave and roll motions due to wave action, the heave plate moves relative to the water flow, thereby increasing the platform's hydrodynamic damping. Specifically, by adding added mass and damping, the heave plate effectively reduces the amplitude of the platform's heave motion and extends the natural periods of heave and roll.

[0034] During the process of the floating platform returning to a balanced state, the heave plate will still generate additional resistance or torque, which will interfere with the recovery process of the floating platform.

[0035] like Figure 1 As shown, the embodiment of the present application discloses a passive damping device 100 , which is used to be installed on a column 200 of a floating platform. The passive damping device 100 includes a cantilever support 110 and a damping plate 120 .

[0036] The cantilever support member 110 is configured to be connected to the column 200. The cantilever support member 110 is used to provide a mounting base for the damping plate 120, thereby achieving the purpose of installing the damping plate 120 on the column 200. This embodiment does not limit the structure of the cantilever support member 110. It can be a rod-shaped member or a profile, as long as it can support the damping plate 120. It should be noted that cantilever support members 110 are provided on both sides of the damping plate 120. Two adjacent damping plates 120 can share a cantilever support member 110 to reduce the number of cantilever support members 110.

[0037] One end of the damping plate 120 is connected to the cantilever support member 110 via a rotating shaft 140. Specifically, after the cantilever support member 110 is mounted on the column 200, it forms a cantilever beam structure. The rotating shaft 140 can be located at the end of the cantilever support member 110 away from the column 200, or it can be located at the end of the cantilever support member 110 closer to the column 200. This embodiment does not limit the specific location of the rotating shaft 140. For ease of understanding, this article uses the example of the rotating shaft 140 being located at the end of the cantilever support member 110 away from the column 200.

[0038] For ease of understanding, the end of the damping plate 120 connected to the rotating shaft 140 is defined as the damping plate connection end, and the other end is defined as the damping plate free end. The damping plate 120 is configured to swing along the rotating shaft 140 between a first extreme position and a second extreme position. It should be noted that the damping plate connection end of the damping plate 120 is constrained by the rotating shaft 140. That is, when the damping plate 120 swings to a certain angle, the farther away from the damping plate connection end, the greater the movement distance, that is, the damping plate free end has the greatest movement distance.

[0039] For ease of understanding, the projection of the damping plate 120 in the first extreme position on the horizontal plane is defined as the first projection, and the projection of the damping plate 120 in the second extreme position on the horizontal plane is defined as the second projection. The area of ​​the first projection is larger than the area of ​​the second projection, and the second extreme position is located below the first extreme position. This configuration allows the damping plate 120 to have different projected areas on the horizontal plane when in the first and second extreme positions. When the floating platform performs heaving motion, the column 200 drives the passive damping device 100 to move in the vertical direction; when the floating platform performs roll or pitch motion, the column 200 drives the passive damping device 100 to swing, and the swinging motion also causes displacement in the vertical direction.

[0040] like Figure 2 and Figure 3 As shown, when the floating platform performs roll and pitch motions, for example, the floating platform oscillates back and forth along a first rotation direction and a second rotation direction, wherein the first rotation direction and the second rotation direction are opposite rotation directions. The first rotation direction tends to move downward, and the second rotation direction tends to move upward.

[0041] like Figure 4-Figure 7 As shown in the figure, when the floating platform makes a heave motion, the floating platform will move downward in the vertical direction (such as Figure 4 and Figure 5 as shown) and upward (as Figure 6 and Figure 7 as shown) reciprocating oscillating motion.

[0042] The damping plate 120 can adjust its own posture according to the up and down movement direction of the floating platform to achieve two-way optimization of resistance. Figure 2 、 Figure 4 and Figure 5 As shown in FIG, the damping plate 120 is pushed upward by the water pressure, so that the damping plate 120 rotates to the first limit position. Since the projection area of ​​the first limit position on the horizontal plane is larger, it has greater damping, which can effectively slow down the sinking speed of the floating platform and reduce the sinking depth.

[0043] When the floating platform moves upward in the water (e.g. Figure 3 、 Figure 6 and Figure 7As shown, damping plate 120 is pushed downward by water pressure, rotating to its second extreme position. Because the second extreme position has a smaller projected area on the horizontal plane, it exhibits less damping. Water above damping plate 120 more easily flows through the gaps between damping plate 120, column 200, and cantilever support member 110, allowing the floating platform to more easily ascend and quickly return to its initial equilibrium position. In other words, during the process of the floating platform returning to equilibrium, the resistance or torque generated by damping plate 120 is minimal, causing less interference with the platform's recovery process.

[0044] The passive damping device disclosed in the embodiments of this application is mounted on the column 200 by connecting the cantilever support member 110 to the column 200. The damping plate 120 is connected to the cantilever support member 110 via a rotating shaft 140, allowing the damping plate 120 to swing between a first extreme position and a second extreme position. The damping plate 120 increases the additional mass and damping of the heave and pitch motions of the floating platform, thereby suppressing these heave and pitch motions.

[0045] The passive damping device disclosed in the embodiment of the present application may also include a damping plate return spring (not shown). The damping plate return spring is configured to drive the damping plate 120 to rotate toward the first limit position. That is, in this embodiment, in the absence of any external force, the damping plate return spring can utilize its own elastic return force to drive the damping plate 120 to the first limit position and maintain it in the first limit position. When an external force overcomes the elastic force of the damping plate return spring, the damping plate 120 can be driven to rotate toward the second limit position.

[0046] Exemplarily, the damping plate reset elastic member can be a torsion spring, which can be mounted on the rotating shaft 140. One spring arm of the torsion spring abuts against the damping plate 120, and the other spring arm abuts against the cantilever support 110 or other fixed components connected to the cantilever support 110, so that the elastic force of the torsion spring can act on the damping plate 120 and drive the damping plate 120 to rotate toward the first extreme position.

[0047] The torsion spring's reset function keeps damping plate 120 stable in its first extreme position. When the floating platform is operating normally or subjected to minor external forces, damping plate 120 remains fixed in position, providing stable initial hydrodynamic damping and ensuring its normal stability. When the floating platform moves upward, the water pressure overcomes the torsion spring's elastic force, driving damping plate 120 to rotate to its second extreme position. This process automatically adjusts the position of damping plate 120, allowing it to respond to the platform's actual motion state. If the floating platform's upward movement requires a more rapid return to equilibrium, the water pressure overcomes the torsion spring's elastic force, changing the angle of damping plate 120 without affecting the platform's ability to quickly regain equilibrium.

[0048] The torsion spring also acts as a buffer during the rotation of the damping plate 120. When the floating platform is subjected to hydrodynamic impact, causing the damping plate 120 to change position, the elastic force of the torsion spring can slow the speed and amplitude of the damping plate 120's rotation, preventing excessive impact on the damping plate 120 and the platform connection structure caused by sudden changes in water pressure, thereby extending the service life of related structural components.

[0049] In this embodiment, the passive damping device can be set above the waterline of the column 200, that is, in a scene without wind and waves, the passive damping device will not be immersed in seawater. The passive damping device will only be immersed in seawater when the wind and waves are large and cause the floating platform to swing or roll. Seawater is corrosive, and components immersed in seawater for a long time are susceptible to corrosion and wear. Placing the damping plate 120 above the waterline when there are no wind and waves can reduce the time the damping plate 120 is in contact with seawater, reduce the corrosion rate of the damping plate 120 by seawater, and extend the service life of the damping plate 120. At the same time, it also reduces the surface wear of the damping plate 120 caused by seawater scouring and friction, reducing maintenance and replacement costs.

[0050] When the floating platform experiences unstable movements such as heave and pitch, the damping plates 120 are immersed in the seawater. At this point, the damping plates 120 can quickly interact with the seawater, generating a significant hydrodynamic damping force, effectively suppressing these movements and improving the platform's stability in complex sea conditions. For example, when encountering strong winds or high waves, the floating platform may experience severe roll and heave. The timely entry of the damping plates 120 into the water can reduce the platform's shaking, ensuring the normal operation of the equipment and the safety of personnel on board.

[0051] Compared to damping plates 120 that remain permanently submerged in the seawater, this submersible design allows the damping plates 120 to respond quickly when the floating platform needs it. When the platform's motion is relatively small, the damping plates 120 remain above the waterline, preventing the platform from struggling to regain equilibrium due to the large restoring damping in the water. When the platform's motion is more intense, the damping plates 120 can promptly enter the seawater and generate the appropriate damping force, enhancing the platform's adaptability to dynamic changes and better responding to sudden changes in sea conditions.

[0052] The passive damping device disclosed in the embodiment of the present application may further include a detection device and a locking pin device. The detection device is disposed on the cantilever support member 110 and / or the rotating shaft 140. That is, in this embodiment, the detection device can be disposed on either the cantilever support member 110 or the rotating shaft 140, as long as it can move with the passive damping device 100.

[0053] When the detection device moves downward, a first signal is output, and when the detection device moves upward in the water, a second signal is output. In this embodiment, the detection device can be used to detect the posture of the passive damping device and then detect the movement direction of the floating platform. The detection device can be a gyroscope, or it can include a valve body device 130 and a position sensor 134 (such as Figure 9 10). It should be noted that the second signal is output only when the detection device moves upward in the water, and the first signal is output in all other motion postures. For example, the first signal is output when the passive damping device moves downward above or below the water, and when it moves upward above the water.

[0054] When the detection device outputs a first signal, the locking pin device locks the damping plate 120 at the first limit position. When the detection device outputs a second signal, the locking pin device releases the damping plate 120. In this embodiment, by providing the detection device and the locking pin device, the damping plate 120 can be locked and unlocked. It should be noted that the power source for the damping plate 120 to return to the first limit position is the damping plate return elastic member disclosed in the above embodiment.

[0055] By accurately sensing the platform's direction of movement and outputting corresponding signals through a detection device, the damping plate 120 can respond appropriately to the platform's different motion states. When the platform moves upward in the water, the damping plate 120 is unlocked and driven by water pressure to swing to the second extreme position, reducing damping and helping the platform quickly regain balance. When moving downward underwater, it is locked in the first extreme position to maintain maximum damping, suppress excessive platform sway, ensure the platform remains stable in various motion situations, and enhance the platform's ability to cope with complex sea conditions. When above water, whether moving upward or downward, the damping plate 120 is locked in the first extreme position to prevent the damping plate 120 from partially entering the water due to downward swinging. At the same time, it can also remain in the first extreme position in the water, providing greater damping.

[0056] In most cases, the damping plate 120 is locked in the first extreme position, reducing unnecessary swinging and wear. Especially during the downward movement underwater and the water movement stages, the locked state greatly reduces the wear of the damping plate 120 and related connecting parts, thereby extending the service life of the equipment, reducing the frequency of equipment maintenance and replacement, and reducing operating costs.

[0057] Further, such as Figures 9-12 As shown, the locking pin device can be disposed on the shaft housing 135, and the shaft 140 is provided with a locking groove for engaging the locking pin device. When the damping plate 120 is in the first extreme position, the locking groove of the shaft 140 corresponds to the locking pin device. The locking pin device can be any mechanism known in the art that can be driven to cause its locking rod to extend or retract, such as a pneumatic cylinder mechanism, a hydraulic cylinder mechanism, or an electric push rod mechanism. This embodiment does not limit the specific structure of the locking pin device, as long as it can be driven to extend or retract. The location of the locking pin device is not limited to the shaft housing 135, and any component that is fixed relative to the cantilever support member 110 can be used.

[0058] After the locking rod of the electric lock pin is extended, it can be inserted into the locking groove, thereby locking the rotating shaft 140 and then locking the damping plate 120. The damping plate return elastic member can drive the damping plate 120 to the first extreme position. At this time, the locking groove of the rotating shaft 140 is rotated to the position corresponding to the locking rod of the lock pin device. After the locking rod is extended, it can be inserted into the locking groove.

[0059] like Figures 8-12 As shown, in a specific embodiment of the present application, the detection device may further include a valve body device 130 and a position sensor 134 . The valve body device 130 includes a valve body shell 131 , a shaft shell 135 , a valve core 132 and a reset elastic member 133 .

[0060] The valve housing 131 is connected to the shaft housing 135, and the shaft 140 is rotatably disposed within the shaft housing 135. The valve housing 131 defines a vertically extending valve cavity. A valve core 132 and a return spring 133 are both disposed within the valve cavity. The return spring 133 is used to drive the valve core 132 upward. A position sensor 134 detects the position of the valve core 132. When the valve core 132 moves downward to clear the position sensor 134, a second signal is output. When the valve core 132 blocks the position sensor 134, a first signal is output.

[0061] The valve core 132 can be a frustum structure, with a smaller diameter at the upper end and a larger diameter at the lower end. The top cavity of the valve chamber is a conical cavity structure that cooperates with the valve core 132 of the frustum structure. Under the action of the reset elastic member 133, the valve core 132 cooperates with the conical cavity structure of the valve cavity. If the valve body device 130 moves upward in the water, the water pressure above the valve body device 130 is relatively large, pushing the valve core 132 downward and compressing the reset elastic member 133. The seawater flows through the gap between the side wall of the valve cavity and the valve core 132, and finally flows out of the valve body device 130 from the bottom of the valve cavity, which can reduce water rent and facilitate the floating platform to restore to a balanced state.

[0062] After valve core 132 moves downward, it no longer blocks position sensor 134, causing position sensor 134 to output the second signal. When valve assembly 130 moves downward in water, the water pressure is weak, causing return spring 133 to push valve core 132 upward and block position sensor 134, causing position sensor 134 to output the first signal. When valve assembly 130 is above water, whether moving upward or downward, the water pressure will not be greater than the elastic force of return spring 133, causing valve core 132 to move downward.

[0063] In this embodiment, the valve core 132 and position sensor 134 cooperate to output signals. This design is simple, direct, and highly reliable. The position changes of the valve core 132 within the valve cavity accurately reflect the external conditions (correlated with the motion state of the floating platform) sensed by the detection device. Position sensor 134 precisely detects the position of the valve core 132 and outputs different signals. This ensures the accuracy and stability of the signal output, making it less susceptible to external interference and misjudgment.

[0064] Valve core 132 moves upward under the action of reset spring 133. The position of valve core 132 changes accordingly when the detection device is in different motion states. For example, when the detection device is moving downward, valve core 132 is forced downward by the corresponding force, avoiding position sensor 134 and outputting a second signal. In other specific states, valve core 132 blocks position sensor 134 from outputting the first signal. This design intuitively converts the motion state of the detection device into different electrical signals, accurately sensing the direction of movement of the floating platform and providing an accurate basis for subsequent control of the state of damping plate 120.

[0065] Because the position of valve core 132 changes in real time with the movement of the detection device, position sensor 134 can monitor the position of valve core 132 in real time and output a corresponding signal, enabling dynamic monitoring of the floating platform's motion state. This allows for timely response to changes in the floating platform's motion state and accurate control and adjustment of damping plate 120 to ensure the stability of the floating platform.

[0066] Furthermore, the damping plate 120 is connected to the rotating shaft 140 via a connecting arm, and a limiting groove 1351 for inserting the connecting arm is provided on the rotating shaft housing 135. Along the swinging direction of the connecting arm, the limiting groove 1351 includes a first limiting wall and a second limiting wall arranged opposite to each other. When the connecting arm abuts against the first limiting wall, the damping plate 120 is in the first limit position, and when the connecting arm abuts against the second limiting wall, the damping plate 120 is in the second limit position. In this embodiment, by providing the limiting groove 1351 on the rotating shaft housing 135 and utilizing the two side walls of the limiting groove 1351 to limit the rotation range of the connecting arm, and then limiting the rotation range of the damping plate 120, the damping plate 120 can only swing between the first limit position and the second limit position, thereby preventing the swinging range of the damping plate 120 from being uncontrolled and failing to effectively maintain the first limit position and the second limit position according to the scene requirements.

[0067] The damping plate 120 may be provided with two connecting arms, and correspondingly, the rotating shaft housing 135 may be provided with two limiting slots 1351. The present application does not limit the number of the connecting arms and the limiting slots 1351.

[0068] It should be noted that the first limit position can be a horizontal position, that is, when the damping plate 120 is in the first limit position, the plane of the damping plate 120 is perpendicular to the extension direction of the column 200. The damping plate 120 in the second limit position forms an acute angle with the damping plate 120 in the first limit position. The specific angle can be designed by those skilled in the art according to needs.

[0069] Further, such as Figure 13 As shown, the valve body assembly 130 may further include a limit support plate 136 having a water-passing hole 1361 extending through the wall thickness. The limit support plate 136 is positioned within the valve cavity. One end of the reset elastic member 133 is connected to the valve core 132, and the other end is connected to the limit support plate 136. The limit support plate 136 is used to provide a support base for the reset elastic member 133. The water-passing hole 1361 extending through the wall thickness in the limit support plate 136 also allows seawater to pass through the valve cavity, thereby preventing increased resistance.

[0070] It should be noted that the limiting support plate 136 may not be provided, but one end of the reset elastic member 133 may be directly supported on the inner wall of the valve body shell 131. In addition, the limiting support plate 136, the reset elastic member 133 and the valve core 132 may be designed as a connected component for easy installation.

[0071] The present application also discloses a floating platform comprising a column 200 and a passive damping device 100, as disclosed in the above embodiment, disposed on the column 200. Due to the inclusion of the passive damping device 100, the floating platform exhibits all the technical benefits of the aforementioned passive damping device 100, which will not be further elaborated herein. The floating platform can be used as a support for wind turbines or other equipment, such as offshore photovoltaic systems. This embodiment does not limit the use of the floating platform.

[0072] like Figure 1 As shown, the floating platform can have three columns 200, evenly spaced around the centerline, i.e., at the three vertices of an equilateral triangle. Each column 200 can be connected by a connecting rod 300 to ensure the integrity of each column 200. It should be noted that the number of columns 200 is not limited to three, and those skilled in the art can select the number of columns 200 based on their needs.

[0073] There are multiple passive damping devices 100 on each column 200 , and the passive damping devices 100 are arranged around the column 200 . Figure 1 In the illustrated solution, the number of passive damping devices 100 on each column 200 is 17. It should be noted that the specific number of passive damping devices 100 is not limited to 17, and those skilled in the art can select the number based on their needs.

[0074] The shape of the damping plate 120 may be a trapezoid, with a smaller width at one end close to the column 200 and a larger width at one end away from the column 200 .

[0075] In a specific embodiment of the present application, the passive damping device 100 on each column 200 surrounds at least half a circle of the column 200. It should be noted that when the installation space on the column 200 allows, each passive damping device 100 can also surround the column 200 once.

[0076] Each passive damping device 100 is independent of each other, and the damping plate 120 of each passive damping device 100 can independently control its own rotation angle.

[0077] When the floating platform rolls and pitches, the passive damping devices 100 on the columns 200 may be at different depths in the water. During the ascent, the water pressure on the passive damping devices 100 at different depths also varies. Consequently, the rotation angles of the damping plates 120 of each passive damping device 100 may also differ. Specifically, the deeper the damping plate 120, the greater the water pressure it experiences, and it may rotate to the second extreme position. Shallower damping plates 120, however, experience less water pressure, and may rotate to a position between the first and second extreme positions. This allows each passive damping device 100 to adjust its position, and consequently its resistance, based on its depth, making it easier to maintain balance during the recovery process.

[0078] For example, if there are three columns 200, the three columns 200 are evenly arranged around the centerline, and the passive damping device 100 on each column 200 is located on a side away from the centerline (i.e., the centerline of the three columns 200). In other words, the passive damping device 100 is arranged outside the columns 200. This arrangement allows the passive damping device 100 to be located on the outer side of the floating platform, ensuring a wider coverage area for the passive damping device 100, improving the damping effect, and ensuring the stability of the floating platform.

[0079] Furthermore, in order to further improve the reliability of the damping plate 120 being limited at the first limit position, in this embodiment, Figure 8 As shown, a limiting portion 150 is provided on the column 200, and the limiting portion 150 is used to limit the first limit position of the damping plate 120. The limiting portion 150 can be a protrusion provided on the column 200. When the damping plate 120 rotates to the first limit position, it abuts against the limiting portion 150. The limiting portion 150 can limit the damping plate 120 from continuing to rotate and remain in the first limit position. In this embodiment, the first limit position of the damping plate 120 is constrained not only by the limiting wall of the limiting groove 1351, but also by the limiting portion 150. Since the first limit position has a greater resistance, the reliability of the damping plate 120 in the first limit position can be guaranteed by the above-mentioned two limits. Since the resistance of the second limit position is smaller, it is sufficient to constrain it only by the limiting wall of the limiting groove 1351.

[0080] The present application also discloses a floating wind turbine system, which includes the floating platform disclosed in the above embodiment. The floating wind turbine system disclosed in the present application also has all the technical effects of the above floating platform, which will not be described in detail here.

[0081] As used in this application and the claims, unless the context clearly indicates an exception, the terms "a," "an," "an," and / or "the" are not intended to refer to the singular and may include the plural, unless the context clearly indicates otherwise. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements. The phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, product, or apparatus that includes the elements.

[0082] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0083] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0084] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core ideas of this application. It should be noted that for those skilled in the art, without departing from the principles of this application, various improvements and modifications can be made to this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A passive damping device, characterized in that: Used for installation on a column (200) of a floating platform, the passive damping device comprises: a cantilever support member (110), the cantilever support member (110) being configured to be connected to the column (200); A damping plate (120), one end of the damping plate (120) is connected to the cantilever support member (110) via a rotating shaft (140), the damping plate (120) is configured to swing along the rotating shaft (140) between a first extreme position and a second extreme position, the projection of the damping plate (120) in the first extreme position on the horizontal plane is a first projection, the projection of the damping plate (120) in the second extreme position on the horizontal plane is a second projection, the area of ​​the first projection is greater than the area of ​​the second projection, and the second extreme position is located below the first extreme position.

2. The passive damping device according to claim 1, characterized in that: It also includes a damping plate reset elastic member, and the damping plate reset elastic member is configured to drive the damping plate (120) to rotate in the direction of the first extreme position.

3. The passive damping device according to claim 2, characterized in that: Also includes: a detection device, disposed on the cantilever support member (110) and / or the rotating shaft (140), outputting a first signal when the detection device moves downward, and outputting a second signal when the detection device moves upward in water; A locking pin device is provided, wherein when the detection device outputs a first signal, the locking pin device locks the damping plate (120) at the first limit position, and when the detection device outputs a second signal, the locking pin device releases the locking of the damping plate (120).

4. The passive damping device according to claim 3, characterized in that: The rotating shaft (140) is provided with a locking groove for cooperating with the locking pin device. When the damping plate (120) is in the first limit position, the locking groove of the rotating shaft (140) corresponds to the locking pin device.

5. The passive damping device according to claim 3, characterized in that: The detection device comprises a valve body device (130) and a position sensor (134), wherein the valve body device (130) comprises: A valve body shell (131) and a rotating shaft shell (135), wherein the valve body shell (131) is connected to the rotating shaft shell (135), and the rotating shaft (140) is rotatably arranged in the rotating shaft shell (135), the valve body shell (131) is provided with a valve cavity that passes through from top to bottom, and the locking pin device is arranged on the rotating shaft shell (135); A valve core (132) and a reset elastic member (133), wherein the valve core (132) and the reset elastic member (133) are both arranged in the valve cavity, the reset elastic member (133) is used to drive the valve core (132) to move upward, and the position sensor (134) is used to detect the position of the valve core (132), outputting the second signal when the valve core (132) moves downward to avoid the position sensor (134), and outputting the first signal when the valve core (132) blocks the position sensor (134).

6. The passive damping device according to claim 5, characterized in that: The damping plate (120) is connected to the rotating shaft (140) via a connecting arm, and a limiting groove (1351) for inserting the connecting arm is provided on the rotating shaft housing (135); Along the swinging direction of the connecting arm, the limiting groove (1351) includes a first limiting wall and a second limiting wall arranged opposite to each other. When the connecting arm abuts against the first limiting wall, the damping plate (120) is in the first limit position. When the connecting arm abuts against the second limiting wall, the damping plate (120) is in the second limit position.

7. The passive damping device according to claim 5, characterized in that: The valve body device (130) further includes a limit support plate (136), the limit support plate (136) is provided with a water hole (1361) that penetrates the wall thickness, the limit support plate (136) is positioned in the valve cavity, one end of the reset elastic member (133) is connected to the valve core (132), and the other end is connected to the limit support plate (136).

8. The passive damping device according to any one of claims 1 to 7, characterized in that: The rotating shaft (140) is arranged at one end of the cantilever support member (110) away from the column (200).

9. A floating platform, characterized in that: The invention relates to a passive damping device (100) comprising a column (200) and the passive damping device (100) according to any one of claims 1 to 8, the passive damping device being arranged on the column (200).

10. The floating platform according to claim 9, wherein: There are multiple passive damping devices (100) on each column (200), and each passive damping device (100) is arranged around the column (200).

11. The floating platform according to claim 10, wherein: The passive damping device (100) on each of the columns (200) surrounds at least half a circumference of the column (200).

12. The floating platform according to claim 11, wherein: There are three columns (200), the three columns (200) are evenly arranged around a center line, and the passive damping device (100) on each column (200) is arranged on a side away from the center line.

13. The floating platform according to claim 9, wherein: A limiting portion (150) is provided on the upright column (200), and the limiting portion (150) is used to limit the first limit position of the damping plate (120).

14. The floating platform according to claim 9, wherein: The cantilever support members (110) are provided on both sides of the damping plate (120).

15. The floating platform according to claim 9, wherein: The passive damping device (100) is arranged above the waterline of the column (200).

16. A floating wind turbine system, characterized in that: Comprising a floating platform according to any one of claims 9 to 15.

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