Rigid simple pendulum type tuned mass damping device and fan

Abstract

The invention relates to the technical field of vibration reduction, in particular to a rigid simple pendulum type tuned mass damping device and a draught fan. The rigid simple pendulum type tuned mass damping device comprises a rigid swing rod, a mass block and a damping mechanism, and one end of the rigid swing rod is used for being connected with a structure to be subjected to vibration reduction; the mass block is arranged at the other end of the rigid swing rod; the damping mechanism is used for connecting the rigid swing rod with a to-be-damped structure so as to provide damping, and the connecting point of the damping mechanism and the rigid swing rod is located on the upper portion of the rigid swing rod. The problem that a damper of a simple pendulum type tuned mass damping device in the prior art is difficult to arrange for a structure to be damped in a narrow space can be solved.

Description

Technical Field

[0001] The 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 generation technology has made great strides in development, and the installed capacity of wind turbines has continued to increase. The wind turbine towers, which serve as supporting structures, are becoming taller and taller, and their high flexibility characteristics are becoming more prominent. The vibration problem of wind turbine towers caused by wind loads is becoming more and more significant, which not only reduces the power generation efficiency of wind turbines, but also affects the fatigue life of components such as impellers and towers. In severe cases, it may even cause tower collapse accidents, resulting in huge losses. It is not economical to solve the vibration problem by increasing the stiffness of the structure itself, and structural vibration control technology is an effective way to solve 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 exceeded 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 of gravity, l is the pendulum length, and when the control frequency of the single pendulum TMD is as low as 0.1 Hz, the pendulum length will reach 24.82 m, which seriously affects the stability and installation space of the TMD structure. In addition, both of the above two structural forms of TMD require the arrangement of special 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 Building TMD (mass 660 tons, wire rope flexible pendulum, viscous damper, built in 2004, and in normal use for 20 years under routine maintenance) and the Shanghai Tower TMD (mass 1000 tons, wire rope flexible pendulum, flat plate eddy current damping, completed in 2014).

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

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

[0007] For offshore wind turbine tower vibration, 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. For wind turbine tower vibration dampers with smaller diameters, there will be cross-influences and difficulty in layout. 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 of difficulty in arranging the damper of the single-pendulum tuned mass damping device in the prior art 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 used to connect to the structure to be damped;

[0012] A mass block, which is arranged 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 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 swing rod 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 schemes, the damping member is an annular float having 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 in the 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 from the floating body to the center of the top spherical hinge, l is the pendulum length, and γ is the ratio of the buoyancy to the gravity 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 its upper end is connected to the installation platform.

[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 a plurality of 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 any one of the above rigid single pendulum type tuned mass damping devices.

[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. Moreover, the reduction of the size and structure of the entire damping device also makes it convenient to arrange the damping device in a narrow space. For example, the damping device can be arranged inside the fan tower barrel. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. 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 creative work.

[0029] Figure 1 A 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 It is a schematic diagram of the front view structure of a damping device using an annular floating body in an embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of the three-dimensional structure of the damping device using the inserted rod in the embodiment of the present invention;

[0032] Figure 4 It is a schematic diagram of the front view structure of the damping device using the plug rod in the embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the arrangement of the plungers in an embodiment of the present invention;

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

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

[0036] Figure 8 Schematic diagram of the structure of the rigid swing arm 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 round cover; 5. mounting platform; 6. bottom inspection platform. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work 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 with the structure to be damped; the mass block 3 is arranged 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 the rigid single pendulum tuned mass damping device, one end of the rigid pendulum 1 is connected to the structure to be damped, and the mass block 3 is arranged at the other end of the rigid pendulum 1. When the structure to be damped vibrates, the mass block 3 will swing along with the rigid pendulum 1, and a damper is required to provide damping for the mass block 3. If damping is provided directly to the mass block 3, a traditional oil damper with a large stroke is required. If damping is provided by damping liquid, a large container is required to hold the damping liquid. In this solution, the damping mechanism 4 is arranged at the upper end of the rigid pendulum 1. When the mass block 3 swings along with the rigid pendulum 1, the swinging stroke of the upper end of the rigid pendulum 1 is small, which can reduce the size and stroke of the damping mechanism 4, and also reduce the amount of damping liquid, which is convenient for the design of the entire damping device. In addition, the size and structure of the entire damping device are reduced, which is also convenient for arranging the damping device in a small space, for example, arranging the damping device in 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 on the outside of the rigid rocker 1 and spaced from the rigid rocker 1. An annular space for containing damping fluid is provided in the annular barrel 41; the mounting plate 42 is sleeved on 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 spaced from the rigid pendulum rod 1. When the rigid pendulum rod 1 swings, there will be no interference with the annular barrel 41. The mounting plate 42 is sleeved on the rigid pendulum rod 1 and 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 is an annular floating body, the control frequency f of the rigid single-pendulum type tuned mass damping device is determined according to , where the reduction ratio l1 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 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 m 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 connection. By adjusting the axial position of the mounting plate 42 relative to the rigid pendulum rod 1, the control frequency can be adjusted. When in 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] In order to facilitate the installation of the rigid swing rod 1 and the annular barrel 41, in this example, a mounting platform 5 is provided for connecting with the structure to be damped, so as to facilitate the installation of the rigid swing rod 1 and the annular barrel 41. For example, the damping device is provided in the wind turbine tower, the circular mounting platform 5 is installed in the wind turbine tower, the rigid swing rod 1 is installed at the center of the mounting platform 5, the annular barrel 41 is sleeved on the outside of the rigid swing rod 1, and the upper end is 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, and the inner vertical plate 411 is shorter than the outer vertical plate 413. When in use, the upper end of the outer vertical plate 413 is connected to the mounting platform 5, and the outer edge of the mounting plate 42 extends above the annular space to install the damping member 43, and the damping member 43 is extended into the annular space, and when the damping member 43 swings with the rigid swing rod 1, the damping member 43 swings in the annular space and does not contact the barrel wall of the annular barrel 41. Such a design facilitates the installation of the annular barrel 41 and can reduce the space occupied by the annular barrel 41. In addition, such a design can be applied to the damping member 43 in the form of an annular float or multiple plug 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 arm 1, and the other end is movably connected to the structure to be damped.

[0055] In this embodiment, a plurality of telescopic dampers 44 arranged at circumferential intervals may be provided on the upper portion of the rigid swing rod 1. When the rigid swing rod 1 swings, the telescopic damper 44 provides damping to the rigid swing rod 1, which is equivalent to providing damping to the mass block 3. The telescopic damper 44 is located at the upper portion of the rigid swing rod 1, where the displacement distance of the rigid swing rod 1 is short, and a telescopic damper 44 with a smaller stroke may be designed, 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] In addition, the telescopic damper 44 is connected to the structure to be damped through the mounting round cover 46 disposed under the mounting platform 5. Since the displacement of the upper part of the rigid swing arm 1 is small, it is not necessary to set a telescopic damper 44 with a large stroke, so a telescopic damper 44 with a small stroke can be used. In order to facilitate the installation of the telescopic damper 44, the mounting platform 5 is disposed in the structure to be damped, and the mounting round cover 46 is disposed on the mounting platform 5. The telescopic damper 44 is disposed between the rigid swing arm 1 and the mounting round cover 46, which can facilitate the installation of the telescopic damper 44, and can realize the use of a telescopic damper 44 with a small stroke, thereby reducing the occupied space.

[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, and 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 by a universal joint or a ball joint to adapt to rotation in all directions, so as to play a vibration reduction role for vibrations in all directions.

[0060] One end of the telescopic damper 44 connected to the vibration reduction structure is movably connected through a second universal hinge 45 to adapt to rotation in all directions. In this example, a mounting platform 5 is set in the vibration reduction structure, and a mounting round cover 46 is set on the mounting platform 5. The second universal hinge 45 adopts a ball joint or a cross coupling and is fixedly connected to the mounting round cover 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 rods 11 are used, and the connection sequence is: first universal joint 13, short pendulum rod 11, short pendulum rod 11 and long pendulum rod 12, and two adjacent parts are connected by flange, the pendulum length is the sum of the lengths of the short pendulum rod 11, short pendulum rod 11 and long pendulum rod 12; if the connection sequence is: short pendulum rod 11, first universal joint 13, short pendulum rod 11 and long pendulum rod 12, and two adjacent parts are connected by flange, the pendulum length is the sum of the lengths of the short pendulum rod 11 and long pendulum rod 12; if the connection sequence is: short pendulum rod 11, short pendulum rod 11, first universal joint 13 and long pendulum rod 12, and two adjacent parts are connected by flange, the pendulum length is the length of the long pendulum rod 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 also provides a wind turbine, which includes any of the rigid single-pendulum tuned mass damping devices described above.

[0064] When the rigid single pendulum tuned mass damping device is used to control the vibration of the wind turbine, the device is set in the wind turbine tower 2, and one end of the rigid pendulum 1 is connected to the wind turbine tower 2, and the mass block 3 is set at the other end of the rigid pendulum 1. Since the mass block 3 will swing with the rigid pendulum 1 when the wind turbine tower is in motion, a damper is required to provide damping for the mass block 3. If damping is directly provided to the mass block 3, a traditional oil damper with a large stroke is required. If damping is provided by damping liquid, a large container is required to hold the damping liquid. Since the space in the wind turbine tower is limited, the damping mechanism 4 is set at the upper end of the rigid pendulum 1 in this solution. When the mass block 3 swings with the rigid pendulum 1, the swing stroke of the upper end of the rigid pendulum 1 is small, which can reduce the size and stroke of the damping mechanism 4, and also reduce the amount of damping liquid, which is convenient for the design of the entire damping device. In addition, the size and structure of the entire damping device are reduced, which is also convenient for setting the damping device in the narrow space in the wind turbine tower 2.

[0065] In addition, an installation platform 5 is provided in the wind turbine tower 2 for installing the rigid swing 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 to provide a maintenance 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 described one by one here.

[0067] In the description of the present application, it should be noted that the terms "upper", "lower", etc. 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 the present application and simplifying the description, rather than indicating or implying 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 the present 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present 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 only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such 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 including 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, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0069] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A rigid single pendulum tuned mass damping device, characterized in that: include: A rigid rocker (1), one end of which is used to be connected to the structure to be damped; A mass block (3) disposed at the other end of the rigid pendulum (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).

2. The rigid single pendulum tuned mass damping device according to claim 1, characterized in that: The damping mechanism (4) comprises: an annular barrel (41), which is connected to the structure to be damped and is 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) which is sleeved on the rigid rocker (1) and is located above the annular space; A damping member (43) is connected to the mounting plate (42) and at least partially extends into the damping fluid in the annular space.

3. The rigid single pendulum tuned mass damping device according to claim 2, characterized in that: 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 fluid, or a plurality of cylindrical rods circumferentially spaced in an annular space.

4. The rigid single pendulum tuned mass damping device according to claim 3, characterized in that: If the damping member (43) is an annular floating body, the control frequency f of the rigid pendulum type tuned mass damper is determined according to where the reduction ratio l1 is the distance from the floating body to the center of the top ball joint, L is the pendulum length, 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, δ m is the inertial mass of the liquid, Vdrain is the liquid displacement 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.

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

6. The rigid single pendulum tuned mass damping device according to claim 5, characterized in that: The annular barrel (41) comprises an inner vertical plate (411), a bottom plate (412) and an outer vertical plate (413); 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 at the lower side of the mounting plate (42); the outer vertical plate (413) is located at 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).

7. The rigid single pendulum tuned mass damping device according to claim 1, characterized in that: The damping mechanism (4) comprises a plurality of telescopic dampers (44) arranged at circumferential intervals, one end of the telescopic damper (44) being movably connected to the rigid rocker (1) and the other end being movably connected to the structure to be damped.

8. The rigid single pendulum tuned mass damping device according to claim 7, characterized in that: The telescopic damper (44) is movably connected to the vibration reduction structure via a second universal hinge (45).

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

10. A fan, characterized in that: It comprises a rigid single pendulum tuned mass damping device as described in any one of claims 1-9.

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