A rigid pendulum type tuned mass damper and fan

Abstract

The present application relates to the technical field of vibration reduction, in particular to a rigid pendulum type tuned mass damper and a fan, the rigid pendulum type tuned mass damper comprising: a rigid pendulum rod, a mass block and a damping mechanism, wherein one end of the rigid pendulum rod is used for connecting with a structure to be damped; the mass block is arranged at the other end of the rigid pendulum rod; the damping mechanism is used for connecting the rigid pendulum rod with the structure to be damped to provide damping, and the connecting point of the damping mechanism and the rigid pendulum rod is located at the upper part of the rigid pendulum rod. The problem that the pendulum type tuned mass damper in the prior art is difficult to arrange for a narrow space of the structure to be damped can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction, and in particular to a rigid single-pendulum tuned mass damping device and a fan. Background Art

[0002] As global energy issues become increasingly prominent, wind power technology has made significant strides forward. Wind turbine capacity continues to increase, and wind turbine towers, the supporting structures, are becoming taller and more flexible. Wind load-induced vibrations in wind turbine towers are becoming increasingly pronounced, not only reducing turbine efficiency but also impacting the fatigue life of components like the impeller and tower. In severe cases, they can even cause tower collapses, resulting in significant losses. Addressing vibrations by increasing the inherent stiffness of the structure is uneconomical. Structural vibration control technology is an effective approach to addressing this problem.

[0003] In reality, we should consider many aspects when choosing which vibration control device to use. Most wind turbines are installed in hills, uninhabited open plains and other areas with harsh working environments. In addition, since the height of wind turbine towers has reached 70-90 meters, or even more than 130 meters, installation and maintenance are extremely inconvenient. Active and semi-active control dampers have too high technical requirements and are overly dependent on controllers, sensors and other components, which increases the probability of damper failure. Therefore, vibration reduction devices such as ATMD, TLD, PTMD, and EHATMD are not currently suitable for vibration control of wind turbine towers. In addition, as wind turbine towers become taller and taller, their vibration frequencies are also getting lower and lower, with the lowest frequency being as low as 0.1Hz, and as the blades rotate to adapt to different wind directions, they must meet the requirements of horizontal directional vibration. The control direction of the spring mass block system TMD is single, and it is difficult to design ultra-low frequency springs. The elastic force of the spring cannot overcome the friction at the bottom of the mass block; while the single pendulum TMD control frequency Where g is the acceleration due to gravity and l is the pendulum length. When the control frequency of a simple pendulum TMD is as low as 0.1 Hz, the pendulum length reaches 24.82 m, severely impacting the stability and installation space of the TMD structure. Furthermore, both TMD structures require specialized dampers to dissipate energy.

[0004] Conventional single-pendulum tuned mass dampers usually use dampers arranged at the bottom of the mass block to provide damping. In order to provide damping for horizontal multi-directional vibrations, multiple dampers are usually required, such as the Taiwan 101 TMD (mass 660 tons, wire rope flexible pendulum, viscous damper, built in 2004, and normally used for 20 years under routine maintenance) and the Shanghai Tower TMD (mass 1000 tons, wire rope flexible pendulum, flat-plate eddy current damper, completed in 2014).

[0005] This type of single pendulum tuned mass damping device solves the problem of difficulty in arranging the damper for the structure to be damped in a small space.

[0006] For example, offshore wind power towers have the following defects:

[0007] To prevent vibrations in offshore wind turbine towers, the mass block needs to have a large stroke (±1000mm). This type of TMD plus the length of the damper connector results in the damper mass block itself being more than 3m long in the equilibrium position, and the maximum working length may exceed 4m. This will cause cross-influences on vibration dampers on wind turbine towers with smaller diameters and make their arrangement difficult. Summary of the Invention

[0008] In view of the defects existing in the prior art, the purpose of the present invention is to provide a rigid single-pendulum tuned mass damping device and a fan, which can solve the problem in the prior art that the single-pendulum tuned mass damping device is difficult to arrange the damper for the vibration-damped structure with a small space.

[0009] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0010] In one aspect, the present invention provides a rigid single pendulum tuned mass damping device, comprising:

[0011] A rigid rocker, one end of which is connected to the structure to be damped;

[0012] a mass block, which is provided at the other end of the rigid pendulum;

[0013] The damping mechanism is used to connect the rigid rocker and the structure to be damped to provide damping, and the connection point between the damping mechanism and the rigid rocker is located at the upper part of the rigid rocker.

[0014] In some optional solutions, the damping mechanism includes:

[0015] an annular barrel connected to the structure to be damped and sleeved on the outside of the rigid rocker and spaced apart from the rigid rocker, wherein an annular space for containing damping fluid is provided in the annular barrel;

[0016] a mounting plate, which is sleeved on the rigid rocker and located above the annular space;

[0017] A damping member is connected to the mounting plate and at least partially extends into the damping fluid in the annular space.

[0018] In some optional solutions, the damping member is an annular float with one end connected to the mounting plate and the other end extending into the damping fluid, or a plurality of cylindrical rods circumferentially spaced apart and arranged in an annular space.

[0019] In some optional solutions, if the damping element is an annular floating body, the control frequency f of the rigid single pendulum tuned mass damping device is based on Determine, where the reduction ratio l is the distance between the floating body and the center of the top spherical hinge, l is the pendulum length, and γ is the ratio of the buoyancy force to the gravity force of the mass block. λ is the ratio of the inertial mass of the liquid to the weight of the mass block.

[0020] According to the drained liquid volume V_drain, g is the acceleration due to gravity, m is the mass of the mass block, and ρ is the density of the damping liquid.

[0021] In some alternative solutions, it further includes an installation platform, which is used to be arranged inside the structure to be vibration-damped for installing the rigid pendulum rod and the annular barrel.

[0022] In some alternative solutions, the annular barrel includes an inner vertical plate, a bottom plate, and an outer vertical plate. The inner vertical plate, the bottom plate, and the outer vertical plate are sequentially connected to form an annular space. The upper end of the inner vertical plate is located below the installation plate, and the outer vertical plate is located outside the installation plate and is connected to the installation platform at the upper end.

[0023] In some alternative solutions, the damping mechanism includes a plurality of telescopic dampers arranged at circumferential intervals. One end of the telescopic damper is movably connected to the rigid pendulum rod, and the other end is movably connected to the structure to be vibration-damped.

[0024] In some alternative solutions, the telescopic damper is movably connected to the vibration-damping structure through a second universal rotating hinge.

[0025] In some alternative solutions, the rigid pendulum rod includes a long pendulum rod, a first universal rotating hinge, and multiple short pendulum rods. Flanges for connection are provided between the long pendulum rod, the first universal rotating hinge, and the short pendulum rods pairwise.

[0026] On the other hand, the present invention also provides a fan, including the rigid single pendulum type tuned mass damping device according to any one of the above.

[0027] Compared with the prior art, the advantages of the present invention are as follows: In this solution, the damping mechanism is arranged at the upper end of the rigid pendulum rod. When the mass block swings together with the rigid pendulum rod, the swing stroke at the upper end of the rigid pendulum rod is smaller, which can reduce the size and stroke of the damping mechanism. In addition, the amount of damping liquid can also be reduced, facilitating the design of the entire damping device. In addition, the size and structure of the entire damping device are reduced, which also facilitates the installation of the damping device in a narrow space. For example, the damping device can be arranged inside the fan tower. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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.

[0029] Figure 1 Schematic diagram of the three-dimensional structure of a damping device using an annular floating body in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the main structure of a damping device using an annular floating body in an embodiment of the present invention;

[0031] Figure 3 Schematic diagram of the three-dimensional structure of a damping device using an insert rod in an embodiment of the present invention;

[0032] Figure 4 Schematic diagram of the main structure of the damping device using the inserted rod in the embodiment of the present invention;

[0033] Figure 5 Schematic diagram of the arrangement of the plungers in an embodiment of the present invention;

[0034] Figure 6 Schematic diagram of the front structure of a damping device using a telescopic damper in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the main structure of a damping device using a telescopic damper in conjunction with a circular cover in an embodiment of the present invention;

[0036] Figure 8 Schematic diagram of the structure of the rigid rocker in an embodiment of the present invention.

[0037] In the figure: 1. Rigid rocker arm; 11. Short rocker arm; 12. Long rocker arm; 13. First universal joint; 2. Wind turbine tower; 3. Mass block; 4. Damping mechanism; 41. Annular barrel; 411. Inner vertical plate; 412. Bottom plate; 413. Outer vertical plate; 42. Mounting plate; 43. Damping element; 44. Telescopic damper; 45. Second universal joint; 46. Mounting dome; 5. Mounting platform; 6. Bottom inspection platform. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0040] like Figures 1 to 7 As shown, on the one hand, the present invention provides a rigid single pendulum tuned mass damping device, comprising: a rigid pendulum 1, a mass block 3 and a damping mechanism 4, wherein one end of the rigid pendulum 1 is used to connect to the structure to be damped; the mass block 3 is provided at the other end of the rigid pendulum 1; the damping mechanism 4 is used to connect the rigid pendulum 1 with the structure to be damped to provide damping, and the connection point between the damping mechanism 4 and the rigid pendulum 1 is located at the upper part of the rigid pendulum 1.

[0041] When using this rigid single-pendulum tuned mass damping device, one end of a rigid pendulum 1 is connected to the structure to be damped, and a mass 3 is positioned at the other end of the rigid pendulum 1. Since mass 3 will swing along with the rigid pendulum 1 when the structure to be damped vibrates, a damper is required to provide damping for mass 3. Directly providing damping for mass 3 requires a traditional oil damper with a large stroke. Using damping fluid requires a large container to hold the damping fluid. In this solution, the damping mechanism 4 is positioned at the upper end of the rigid pendulum 1. When mass 3 swings along with the rigid pendulum 1, the upper end of the rigid pendulum 1 has a smaller swing stroke. This reduces the size and stroke of the damping mechanism 4, as well as the amount of damping fluid used, facilitating the design of the entire damping device. Furthermore, the reduced size and structure of the entire damping device facilitate its placement in confined spaces, such as within a wind turbine tower.

[0042] like Figures 1 to 5 As shown, in some optional embodiments, the damping mechanism 4 includes an annular barrel 41, a mounting plate 42, and a damping member 43. The annular barrel 41 is connected to the structure to be damped and is sleeved outside the rigid rocker 1, spaced apart from the rigid rocker 1. An annular space for holding a damping fluid is defined within the annular barrel 41. The mounting plate 42 sleeves onto the rigid rocker 1 and is located above the annular space. The damping member 43 is connected to the mounting plate 42 and at least partially extends into the damping fluid in the annular space.

[0043] In this embodiment, the annular barrel 41 is sleeved outside the rigid pendulum rod 1 and is spaced from the rigid pendulum rod 1. When the rigid pendulum rod 1 swings, it will not interfere with the annular barrel 41. The mounting plate 42 is sleeved on the rigid pendulum rod 1 and is fixedly connected to the rigid pendulum rod 1. When the rigid pendulum rod 1 swings, it drives the damping member 43 on the mounting plate 42 to swing together. The damping member 43 moves in the damping liquid in the annular space, thereby providing damping to the rigid pendulum rod 1, which is equivalent to providing damping to the mass block 3. The mounting plate 42 is located at the upper part of the rigid pendulum rod 1. Here, the displacement distance of the rigid pendulum rod 1 is short, and a smaller annular barrel 41 can be designed, thereby reducing the volume of the entire damping device.

[0044] As Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, in some alternative embodiments, the damping member 43 is an annular floating body with one end connected to the mounting plate 42 and the other end extending into the damping liquid, or a plurality of cylindrical insertion rods circumferentially spaced in the annular space.

[0045] In this embodiment, the annular floating body is connected to the rigid pendulum through the mounting plate 42. The annular barrel 41 is installed on the top platform. The mass block 3 is more compact when it is solid. Under the same stroke of the mass block 3, the stroke ratio of the annular floating body is reduced, effectively reducing the size of the damping barrel (the annular barrel is used in this example) and the amount of damping liquid used. Affected by the lever reduction effect of the upward movement of the annular floating body, the inertial mass and buoyancy generated by the floating body are also reduced proportionally.

[0046] In some alternative embodiments, if the damping member 43 uses an annular floating body, the control frequency f of the rigid single pendulum type tuned mass damper is determined according to , where the reduction ratio l1 is the distance between the floating body and the center of the top spherical hinge, L is the pendulum length, γ is the ratio of the buoyancy to the gravity of the mass block, λ is the ratio of the liquid inertial mass to the weight of the mass block, δ

[0048] is the liquid inertial mass, Vd is the drainage volume of the mass block 3, g is the acceleration due to gravity, m is the mass of the mass block 3, and ρ is the density of the damping liquid.

[0047] In this embodiment, the mounting plate 42 can move relative to the axial direction of the rigid pendulum rod 1 and can be fixed relative to the rigid pendulum rod 1 after moving in place. The mounting plate 42 and the rigid pendulum rod 1 can be connected by a snap-fastening method. By adjusting the axial position of the mounting plate 42 relative to the rigid pendulum rod 1, the control frequency can be adjusted. During specific use, the control frequency is determined according to , and the position of the mounting plate 42 is determined according to the reduction ratio , so that the control frequency can be adjusted according to different requirements.

[0048] In some optional embodiments, the rigid single pendulum tuned mass damping device further includes a mounting platform 5 , which is used to be disposed in the structure to be damped so as to mount the rigid pendulum rod 1 and the annular barrel 41 .

[0049] To facilitate the installation of the rigid rocker arm 1 and the annular barrel 41, a mounting platform 5 is provided in this example for connection to the structure to be damped. This facilitates the installation of the rigid rocker arm 1 and the annular barrel 41. For example, the damping device is installed within a wind turbine tower. The circular mounting platform 5 is mounted within the wind turbine tower, the rigid rocker arm 1 is mounted at the center of the mounting platform 5, and the annular barrel 41 is sleeved around the outside of the rigid rocker arm 1, with its upper end connected to the mounting platform 5.

[0050] In this example, the rigid rocker arm 1 is rotatably connected to the mounting platform 5 via a rotary hinge, and the rotary hinge is a ball joint or a cross coupling.

[0051] like Figure 2 As shown, in some optional embodiments, the annular barrel 41 includes an inner vertical plate 411, a bottom plate 412 and an outer vertical plate 413, and the inner vertical plate 411, the bottom plate 412 and the outer vertical plate 413 are connected in sequence to form an annular space, the upper end of the inner vertical plate 411 is located on the lower side of the mounting plate 42, the outer vertical plate 413 is located on the outside of the mounting plate 42, and the upper end is connected to the mounting platform 5.

[0052] In this embodiment, the inner vertical plate 411, the bottom plate 412, and the outer vertical plate 413 are connected in a U-shape to form an annular space. The inner vertical plate 411 is shorter than the outer vertical plate 413. During use, the upper end of the outer vertical plate 413 is connected to the mounting platform 5. The outer edge of the mounting plate 42 extends above the annular space for mounting the damping member 43. The damping member 43 extends into the annular space. When the damping member 43 swings with the rigid rocker 1, the damping member 43 swings in the annular space without contacting the barrel wall of the annular barrel 41. This design facilitates the installation of the annular barrel 41 and reduces the space occupied by the annular barrel 41. In addition, this design is applicable to damping members 43 in the form of an annular float or multiple rods, which can be selected according to needs.

[0053] The specific design dimensions are: the outer diameter of the annular damping barrel is 0.88m, the inner diameter is 0.208m, the outer diameter of the annular float is 0.76m, the inner diameter is 0.34m, the mass of the annular float is 90kg, the distance between the fixture and the top is 0.55m, the leverage coefficient is 1:5, that is, the mounting plate 42 is set at the upper 1 / 5 of the rigid rocker arm 1.

[0054] like Figure 6 and Figure 7 As shown, in some optional embodiments, the damping mechanism 4 includes a plurality of circumferentially spaced telescopic dampers 44 , one end of the telescopic damper 44 is movably connected to the rigid rocker 1 , and the other end is movably connected to the structure to be damped.

[0055] In this embodiment, multiple telescopic dampers 44 are provided at circumferential intervals on the upper portion of the rigid rocker 1. When the rigid rocker 1 swings, the telescopic dampers 44 provide damping to the rigid rocker 1, which is equivalent to providing damping to the mass 3. The telescopic dampers 44 are located at the upper portion of the rigid rocker 1, where the displacement distance of the rigid rocker 1 is relatively short. Therefore, the telescopic dampers 44 can be designed with a smaller stroke, thereby reducing the volume of the entire damping device.

[0056] In this example, the damping mechanism 4 uses four telescopic dampers 44, which are evenly spaced in the circumferential direction of the rigid rocker 1, so that vibrations in all directions can be reduced.

[0057] Furthermore, the telescopic damper 44 is connected to the structure to be damped via a mounting dome 46 disposed below the mounting platform 5. Since the displacement of the upper portion of the rigid rocker arm 1 is relatively small, a telescopic damper 44 with a large stroke is not required, and therefore a telescopic damper 44 with a small stroke can be used. To facilitate installation of the telescopic damper 44, a mounting platform 5 is provided within the structure to be damped, and a mounting dome 46 is provided on the mounting platform 5. The telescopic damper 44 is positioned between the rigid rocker arm 1 and the mounting dome 46. This facilitates installation of the telescopic damper 44 and allows the use of a telescopic damper 44 with a small stroke, thus reducing space requirements.

[0058] In some optional embodiments, the telescopic damper 44 is movably connected to the vibration reduction structure via a second universal joint 45 .

[0059] In this embodiment, the rigid rocker arm 1 is provided with a clamping member for connecting the telescopic damper 44, and the clamping member is provided with a lug corresponding to the telescopic damper 44. The lug is rotatably connected to the end of the telescopic damper 44. Of course, the clamping member can also be rotatably connected to the telescopic damper 44 through a universal joint or a ball joint to adapt to rotation in all directions, so as to have a vibration reduction effect on vibrations in all directions.

[0060] One end of the telescopic damper 44, connected to the vibration-damping structure, is movably connected via a second universal joint 45, allowing for rotation in all directions. In this example, a mounting platform 5 is provided within the structure to be damped, and a mounting hood 46 is positioned on the mounting platform 5. The second universal joint 45, which utilizes a ball joint or a cross coupling, is fixedly connected to the mounting hood 46.

[0061] like Figure 8 As shown, in some optional embodiments, the rigid rocker arm 1 includes a long rocker arm 12, a first universal joint 13 and a plurality of short rocker arms 11, and flanges for connection are provided between the long rocker arm 12, the first universal joint 13 and the short rocker arms 11.

[0062] In this embodiment, since the control frequency of the simple pendulum tuned mass damper is related to the pendulum length, in this solution, the first universal joint 13 and multiple short pendulum rods 11 are arranged above the long pendulum rod 12. By adjusting the position of the first universal joint 13, the actual pendulum length of the simple pendulum can be adjusted, thereby adjusting the control frequency. For example, if two short pendulum links 11 are connected in the following order: first universal joint 13, short pendulum link 11, short pendulum link 11, and long pendulum link 12, and the two adjacent components are connected by a flange, the pendulum length is the sum of the lengths of the short pendulum link 11, the short pendulum link 11, and the long pendulum link 12; if the connection order is: short pendulum link 11, first universal joint 13, short pendulum link 11, and long pendulum link 12, and the two adjacent components are connected by a flange, the pendulum length is the sum of the lengths of the short pendulum link 11 and the long pendulum link 12; if the connection order is: short pendulum link 11, short pendulum link 11, first universal joint 13, and long pendulum link 12, and the two adjacent components are connected by a flange, the pendulum length is the length of the long pendulum link 12. The control frequency can also be adjusted in this way.

[0063] See again Figures 1 to 8 As shown, on the other hand, the present invention further provides a wind turbine, which includes any one of the rigid single pendulum tuned mass damping devices described above.

[0064] When using this rigid single-pendulum tuned mass damping device to control wind turbine vibration, the device is placed within the wind turbine tower 2, with one end of the rigid pendulum 1 connected to the wind turbine tower 2, and a mass 3 placed at the other end of the rigid pendulum 1. Since the mass 3 swings along with the rigid pendulum 1 when the wind turbine is in motion, a damper is required to provide damping for the mass 3. If damping is provided directly to the mass 3, a traditional oil damper with a large stroke is required. If damping is provided by damping fluid, a large container is required to hold the damping fluid. Due to the limited space within the wind turbine tower, in this solution, the damping mechanism 4 is placed at the upper end of the rigid pendulum 1. When the mass 3 swings along with the rigid pendulum 1, the upper end of the rigid pendulum 1 has a smaller swing stroke. This reduces the size and stroke of the damping mechanism 4, and also reduces the amount of damping fluid used, facilitating the design of the entire damping device. Furthermore, the reduced size and structure of the entire damping device facilitate its placement within the confined space within the wind turbine tower 2.

[0065] In addition, an installation platform 5 is provided inside the wind turbine tower 2 for installing the rigid rocker arm 1 and the annular barrel 41. A bottom maintenance platform 6 is also provided below the mass block 3 and connected to the inner side of the wind turbine tower 2, providing an inspection platform for maintenance personnel and a working platform for installers.

[0066] In this embodiment, the rigid single pendulum tuned mass damping device installed in the fan has the same structure as the rigid single pendulum tuned mass damping device in the above embodiment, and the technical problems solved, the functions achieved and the technical effects achieved are also the same, which will not be repeated here.

[0067] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0068] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0069] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A rigid pendulum tuned mass damping device, characterized in that: include: A rigid rocker (1), one end of which is used to connect to the structure to be damped; A mass block (3) is provided at the other end of the rigid rocker (1); A damping mechanism (4) is used to connect the rigid rocker (1) and the structure to be damped to provide damping, and the connection point between the damping mechanism (4) and the rigid rocker (1) is located at the upper part of the rigid rocker (1); The damping mechanism (4) comprises: an annular barrel (41) connected to the structure to be damped, sleeved on the outside of the rigid rocker (1), and spaced apart from the rigid rocker (1); an annular space for containing damping fluid is provided in the annular barrel (41); A mounting plate (42) is sleeved on the rigid rocker (1) and is located above the annular space; a damping member (43) connected to the mounting plate (42) and at least partially extending into the damping fluid in the annular space; The damping member (43) is an annular float with one end connected to the mounting plate (42) and the other end extending into the damping fluid, or a plurality of cylindrical rods circumferentially spaced apart and arranged in the annular space; If the damping member (43) is an annular floating body, the control frequency of the rigid single pendulum tuned mass damping device is f according to Determine, where the reduction ratio , l 1 is the distance between the floating body and the center of the top ball joint, L is the pendulum length, γ is the ratio of the mass block’s buoyancy to gravity, ;λ is the ratio of the inertial mass of the liquid to the weight of the mass block, , is the inertial mass of the liquid, is the displacement volume of the mass block (3), g is the acceleration due to gravity, m is the mass of the mass block (3), is the density of the damping fluid.

2. The rigid pendulum tuned mass damping device according to claim 1, wherein: It also includes a mounting platform (5) which is arranged in the structure to be damped to mount the rigid rocker (1) and the annular barrel (41).

3. The rigid pendulum tuned mass damping device according to claim 2, wherein: The annular barrel (41) comprises an inner vertical plate (411), a bottom plate (412) and an outer vertical plate (413), wherein the inner vertical plate (411), the bottom plate (412) and the outer vertical plate (413) are sequentially connected to form an annular space, wherein the upper end of the inner vertical plate (411) is located on the lower side of the mounting plate (42), and the outer vertical plate (413) is located on the outer side of the mounting plate (42), and the upper end of the outer vertical plate (413) is connected to the mounting platform (5).

4. The rigid pendulum tuned mass damping device according to claim 1, wherein: The rigid rocker (1) comprises a long rocker (12), a first universal joint (13), and a plurality of short rocker rods (11), wherein flanges for connection are provided between each of the long rocker rod (12), the first universal joint (13), and the short rocker rods (11).

5. A fan, characterized in that: It comprises the rigid single pendulum tuned mass damping device as described in any one of claims 1-4.

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