Vibration suppression device suitable for fan tower drum and wind generating set

Abstract

The invention relates to the technical field of wind power generation, and discloses a vibration suppression device suitable for a fan tower drum and a wind generating set. The functional platform is arranged above the supporting mechanism; the damping structure is connected between the supporting mechanism and the functional platform; and the elastic structure is connected between the peripheral wall of the functional platform and the inner wall of the tower drum. The vibration suppression device forms a tuned mass damping system, system mass is provided by the functional platform, system rigidity is provided by the elastic structure, system damping is provided by the damping structure, the natural vibration frequency of the vibration suppression device is close to that of the tower drum by adjusting the mass of the functional platform and the rigidity of the elastic structure, and energy consumption is achieved through the damping structure. The vibration suppression effect of the tower drum is achieved; the function platform of the tower is used as a structural vibration suppression control measure, no extra platform is needed for installing various vibration suppression devices, the original overall arrangement scheme of the tower does not need to be changed, and the applicability and economical efficiency of the vibration suppression devices are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation technology, in particular to a vibration suppression device suitable for a wind turbine tower and a wind turbine generator. BACKGROUND

[0002] Wind power generation refers to converting the kinetic energy of wind into electric energy, and is usually completed by a wind turbine generator. The wind power tower is a tower of a wind turbine generator, which mainly supports and absorbs vibration of the wind turbine generator. Vibration has many influences on mechanical structure fatigue, safe operation, operation efficiency and maintenance cost of the wind turbine. Therefore, in the prior art, a vibration suppression device is usually provided to achieve the purpose of shock absorption and vibration reduction. However, the existing vibration suppression device will affect the original structure arrangement of the tower, and affect the overall design scheme of the tower. SUMMARY

[0003] The present application provides a vibration suppression device suitable for a wind turbine tower and a wind turbine generator to solve the problem that the existing vibration suppression device will affect the original structure arrangement of the tower.

[0004] In a first aspect, the present application provides a vibration suppression device suitable for a wind turbine tower, comprising: a support mechanism adapted to be connected to the tower; a functional platform arranged above the support mechanism; a damping structure connected between the support mechanism and the functional platform; a resilient structure connected between the outer wall of the functional platform and the inner wall of the tower.

[0005] Beneficial effects: the vibration suppression device forms a tuned mass damper system as a whole, the functional platform provides the system mass, the resilient structure provides the system stiffness, and the damping structure provides the system damping. By adjusting the mass of the functional platform and the stiffness of the resilient structure, the self-vibration frequency of the vibration suppression device is close to the self-vibration frequency of the tower, and energy consumption is achieved through the damping structure, thereby achieving the vibration suppression effect of the tower. In addition, the functional platform of the tower is used as a structural vibration suppression control measure, and there is no need to additionally set a platform for installing various vibration suppression devices, so that the original overall arrangement scheme of the tower does not need to be changed, and the applicability and economy of the vibration suppression device are improved.

[0006] In an optional embodiment, the functional platform comprises a plurality of platform blocks, and the plurality of platform blocks are sequentially arranged in a circumferential direction.

[0007] Beneficial effects: the plurality of platform blocks are used to form the entire functional platform in a splicing manner, which facilitates installation and replacement of the functional platform.

[0008] In an alternative embodiment, the platform block comprises a block body and an extension part, the extension part is connected to the opposite sides of the block body in the circumferential direction, the extension parts of adjacent platform blocks are arranged in overlapping manner and are connected by fasteners.

[0009] Beneficial effects: the extension parts of adjacent platform blocks are overlapped and connected by fasteners, which ensures the integrity and reliability of the assembled functional platform.

[0010] In an alternative embodiment, the vibration suppression device further comprises a locking structure, the locking structure is connected to the functional platform, and the locking structure is suitable for connecting the tower.

[0011] Beneficial effects: when the tower is operated and maintained, the functional platform can be fixedly connected to the tower by the locking structure, so as to avoid the shaking of the functional platform and the interference and safety risks caused by the shaking of the functional platform to the operation and maintenance work of the workers.

[0012] In an alternative embodiment, the locking structure comprises a fixing rod and a first fixing seat, one end of the fixing rod is connected to the outer peripheral wall of the functional platform, the first fixing seat is connected to the other end of the fixing rod, and the first fixing seat is suitable for connecting the inner wall of the tower.

[0013] In an alternative embodiment, the support mechanism comprises a platform beam and a connecting piece, a plurality of platform beams are arranged in a cross manner, the connecting piece is connected to the end of the platform beam, and the damping structure is arranged at the intersection of a plurality of platform beams.

[0014] In an alternative embodiment, the vibration suppression device further comprises a steel strand hoop, the steel strand hoop is connected to the platform beam and is arranged close to the end of the platform beam.

[0015] Beneficial effects: the steel strand hoop is used to limit the steel strand, which can reduce the shaking of the steel strand and avoid the contact and collision between the steel strand and the adjacent structure such as the tower.

[0016] In an alternative embodiment, the damping structure comprises a first steel plate, a second steel plate and a rubber piece, the rubber piece is connected between the first steel plate and the second steel plate, the first steel plate is connected to the support mechanism, and the second steel plate is connected to the functional platform.

[0017] In an alternative embodiment, a plurality of damping structures are arranged at intervals; and / or, The elastic structure is arranged at intervals in the circumferential direction.

[0018] In a second aspect, the present application further provides a wind turbine generator, comprising: a tower. The vibration suppression device is arranged in the tower drum. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Figure 1 A structural schematic view of a support mechanism, a functional platform and a damping structure in a vibration suppression device suitable for a fan tower drum according to an embodiment of the present application; Figure 2 A structural schematic view of a functional platform, a damping structure, an elastic structure and a locking structure in a vibration suppression device suitable for a fan tower drum according to an embodiment of the present application; Figure 3 A structural schematic view of a support mechanism, a damping structure and a steel strand hoop in a vibration suppression device suitable for a fan tower drum according to an embodiment of the present application.

[0021] Explanation of reference signs: 1, support mechanism; 11, platform beam; 111, first beam body; 112, second beam body; 12, connecting piece; 2, functional platform; 21, platform block; 211, block body; 212, extension; 2121, connecting hole; 3, damping structure; 31, first steel plate; 32, second steel plate; 33, rubber piece; 4, elastic structure; 41, spring; 42, second fixing seat; 5, locking structure; 51, fixing rod; 52, first fixing seat; 6, steel strand hoop. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0023] The embodiments of the present application will be described below in combination with Figures 1 to 3 .

[0024] According to an embodiment of the present application, in one aspect, a vibration suppression device suitable for a fan tower is provided, comprising: a support mechanism 1 adapted to be connected to the tower; a functional platform 2 arranged above the support mechanism 1; a damping structure 3 connected between the support mechanism 1 and the functional platform 2; and an elastic structure 4 connected between the outer wall of the functional platform 2 and the inner wall of the tower.

[0025] The vibration suppression device of the present embodiment forms a tuned mass damper system as a whole, the functional platform 2 provides the system mass, the elastic structure 4 provides the system stiffness, and the damping structure 3 provides the system damping. By adjusting the mass of the functional platform 2 and the stiffness of the elastic structure 4, the natural frequency of the vibration suppression device is close to the natural frequency of the tower, and energy is dissipated through the damping structure 3, thereby achieving the suppression of tower vibration. In addition, the functional platform 2 of the tower is used as a structural vibration suppression control measure, without the need for additional platforms for installing various vibration suppression devices, thereby not changing the original overall arrangement of the tower, improving the applicability and economy of the vibration suppression device.

[0026] It should be noted that at present, in the field of high-rise structure vibration control, the tuned mass scheme is generally used, for example, by connecting a heavy pendulum or a spring oscillator to the main structure. A small part uses inertial damper or liquid damper and other ways. These ways have the following problems: (1) Heavy pendulum: the heavy pendulum scheme is directly related to the frequency and pendulum length. In order to meet the requirement that the frequency of the vibration reduction system is close to the natural frequency of the structure, the pendulum length needs to exceed 10m, which seriously affects the structural arrangement and has great limitations. (2) Spring oscillator: the spring oscillator scheme generally uses existing products. Due to the small mass of the vibration reduction system, the vibration reduction effect is not ideal, and there are problems such as the need for a separate dedicated platform, and the applicability is limited. (3) Inertial damper: based on the tuned mass damper, the rotational kinetic energy of the oscillator is used to improve the apparent mass. The structure is complex, the manufacturing cost is high, and a dedicated platform needs to be set up in the tower, affecting the overall design scheme of the tower, and the applicability is limited. (4) Liquid damper: the cost is high by using a specially designed container to make the liquid shake at a frequency close to the natural frequency of the main structure. In order to ensure the vibration reduction effect, a large amount of liquid is needed in the damper. If there is a leakage problem, the electrical equipment in the tower may be damaged.

[0027] In addition, in the related art, there is a vibration reduction design scheme, which can set a tuned mass damper or a tuned inertial vibration reduction device on the functional platform 2 in the tower.

[0028] It is worth mentioning that the tuned mass damper (TMD) is composed of a mass, a spring and a damping system. By adjusting the vibration frequency of the tuned mass damper to the frequency of the main structure (the tower in this embodiment), the resonance characteristics of the structure are changed to achieve the vibration reduction effect.

[0029] Therefore, the tuned mass damper solution in the related art needs to additionally set a mass, a spring, a damping and the like on the functional platform 2, resulting in a complex overall structure and occupying space of the original functional platform 2, affecting the layout and use of the original functional platform 2.

[0030] However, the vibration suppression device of the embodiment uses the original functional platform 2 as a mass, and only needs to correspondingly set a spring, a damping and the like on the outer periphery and below the functional platform 2, so as to realize effective vibration control while improving the economy as much as possible under the premise of ensuring the normal use function of the tower.

[0031] It can be understood that there are some platform structures in the tower, for example, for periodic maintenance and the like of the tower, for workers to stand on. In the vibration reduction design scheme of the related art, a special additional platform is usually made for installing the vibration suppression device, or the entire vibration suppression device (including the mass) is set on the original platform structure. The design idea of the present scheme is to use the platform structure originally existing in the tower as a part of the vibration suppression device (as a mass), and to transform it into a vibration reduction platform without affecting the original use function of the platform structure.

[0032] Further, in an embodiment, as shown in Figure 2 The functional platform 2 includes a plurality of platform blocks 21, which are sequentially arranged in a circumferential direction. The plurality of platform blocks 21 are used to form the entire functional platform 2 in a splicing manner, facilitating the installation and replacement of the functional platform 2.

[0033] It is worth mentioning that the shape of the functional platform 2 is consistent with the cross-sectional shape of the tower, and the cross section of the tower is usually circular, and the functional platform 2 is in the shape of a circular plate. In this embodiment, the functional platform 2 is formed by splicing a plurality of platform blocks 21 in a circumferential direction.

[0034] In addition, the diameter of the functional platform 2 is appropriately reduced compared with the inner diameter of the tower, so as to leave a certain gap between the functional platform 2 and the tower, and to install the elastic structure 4 and the like.

[0035] Specifically, in an embodiment, as shown in Figure 2As shown, the platform block 21 comprises a block body 211 and an extension 212, the extension 212 is connected to the opposite sides of the block body 211 in the circumferential direction, and the extensions 212 of adjacent platform blocks 21 are arranged in overlap and connected by fasteners. The extensions 212 of adjacent platform blocks 21 are overlapped and then connected and fixed by fasteners, which ensures the integrity and reliability of the completed functional platform 2.

[0036] It is worth noting that, as Figure 2 shown, the extension 212 is provided with a connecting hole 2121, and when the extensions 212 of adjacent platform blocks 21 are overlapped, the connecting holes 2121 can be correspondingly connected, and the fasteners (such as bolts) are arranged in the connecting holes 2121.

[0037] It is worth noting that, as Figure 2 shown, the thickness of the extension 212 is reduced compared to the thickness of the block body 211, and after the two adjacent extensions 212 are overlapped, the thickness of the extension 212 can be equivalent to the thickness of the block body 211, so as to form a functional platform 2 with uniform thickness.

[0038] Of course, in other alternative embodiments, each platform block 21 can be set as a standard fan-shaped plate body, and the adjacent edges of adjacent platform blocks 21 are arranged to abut each other, at which time the adjacent platform blocks 21 can be connected by using a latch or the like.

[0039] Further, in one embodiment, the functional platform 2 adopts a concrete material. By using the type of concrete platform plate, the weight of the platform itself can be effectively improved compared to the existing steel platform scheme, and better vibration reduction effect can be achieved; in addition, the design of the assembled type of multiple platform blocks 21 effectively improves the installation efficiency.

[0040] In one embodiment, as Figure 2 shown, the vibration suppression device further comprises a locking structure 5, the locking structure 5 is connected with the functional platform 2, and the locking structure 5 is suitable for connecting the tower drum. When performing maintenance and other operations on the tower drum, the functional platform 2 can be fixedly connected with the tower drum by the locking structure 5, so as to avoid the functional platform 2 from shaking and causing interference with the maintenance work of the worker and bringing safety risks.

[0041] It is worth noting that the tower drum needs to be maintained regularly, and the worker needs to stand on the functional platform 2 during the maintenance. If the functional platform 2 shakes, it may affect the maintenance work of the worker, and even affect the stability of the worker standing on the functional platform 2, and there is a risk of falling and other safety hazards. Therefore, when the tower drum is in normal use, the locking structure 5 does not need to be connected with the tower drum to meet the vibration reduction requirement; when the tower drum needs to be maintained, the locking structure 5 is connected and fixed with the tower drum to ensure the smooth operation of the worker and personal safety.

[0042] Further, in one embodiment, as shown in Figure 2 the locking structure 5 is circumferentially spaced apart. In this way, the stability of the functional platform 2 during operation and maintenance can be ensured.

[0043] Specifically, in one embodiment, as shown in Figure 2 the locking structure 5 includes a fixed rod 51 and a first fixed seat 52, one end of the fixed rod 51 is connected to the outer peripheral wall of the functional platform 2, and the first fixed seat 52 is connected to the other end of the fixed rod 51. The first fixed seat 52 is adapted to be connected to the inner wall of the tower drum.

[0044] It should be noted that the locking structure 5 can be connected to the tower drum by means of a bolt passing through the first fixed seat 52 and being fastened to the inner wall of the tower drum.

[0045] Of course, in other alternative embodiments, the locking structure 5 can also be other fixed structures, such as a plug rod (one end inserted into the functional platform 2 and the other end inserted into the inner wall of the tower drum), as long as the locking structure 5 can be fixed and separated from the tower drum.

[0046] In one embodiment, as shown in Figure 3 the support mechanism 1 includes a platform beam 11 and a connecting piece 12, the platform beam 11 is crosswise arranged, the connecting piece 12 is connected to the end of the platform beam 11, and the damping structure 3 is arranged at the intersection of the platform beams 11.

[0047] Specifically, in one embodiment, as shown in Figure 3 the platform beam 11 adopts an assembled steel structure beam group, in the same horizontal plane, the steel structure beam group includes a plurality of first beam bodies 111 arranged in a first direction and a plurality of second beam bodies 112 arranged in a second direction, the first direction and the second direction are arranged at a predetermined angle (for example, perpendicular), and therefore, the plurality of first beam bodies 111 and the plurality of second beam bodies 112 form a grid structure, further, the connecting piece 12 for connecting to the tower drum is arranged at the end of the first beam body 111 and the second beam body 112 (which can be all or part, as needed), and the damping structure 3 is arranged at the connecting node of the first beam body 111 and the second beam body 112 (the number and arrangement of the damping structure 3 can be arranged according to actual needs).

[0048] It should be noted that the connecting piece 12 and the tower drum can be fastened and connected by means of a bolt.

[0049] In one embodiment, as shown in Figure 3As shown, the vibration suppression device further comprises a steel strand hoop 6 connected to the platform beam 11 and arranged close to the end of the platform beam 11. The steel strand is limited by the steel strand hoop 6, which can reduce the swing of the steel strand and avoid contact and collision between the steel strand and the adjacent structure such as the tower drum.

[0050] It should be noted that the steel strand is usually arranged inside the tower drum as a component of the tower drum load bearing, and extends along the height direction of the entire tower drum. During the operation of the wind power tower drum, the steel strand will also have a certain swing, and may hit the tower drum wall. Therefore, in the embodiment, the steel strand is limited by the arrangement of the steel strand hoop 6, which reduces the swing amplitude of the steel strand and further improves the vibration suppression effect.

[0051] It should be noted that the number and position of the steel strand hoop 6 can be arranged according to the number and position of the steel strand inside the tower drum.

[0052] In one embodiment, as shown in Figure 2 The damping structure 3 comprises a first steel plate 31, a second steel plate 32 and a rubber piece 33 connected between the first steel plate 31 and the second steel plate 32, the first steel plate 31 is connected with the support mechanism 1, and the second steel plate 32 is connected with the functional platform 2.

[0053] It can be understood that the top of the support mechanism 1 is connected with the first steel plate 31, and the bottom of the functional platform 2 is connected with the second steel plate 32.

[0054] Specifically, in the embodiment, the first steel plate 31 can be connected with the platform beam 11 by bolts, and the second steel plate 32 can be connected with the block 211 by bolts.

[0055] In one embodiment, the damping structure 3 is arranged at intervals.

[0056] It should be noted that each block 211 can be connected with the damping structure 3, or only part of the blocks 211 can be connected with the damping structure 3, which can be arranged according to actual needs.

[0057] It should be noted that the rubber piece 33 is arranged between the functional platform 2 and the support mechanism 1. Compared with the traditional viscous damper which can only provide one-dimensional linear damping, the rubber piece 33 can provide two-dimensional plane damping in the horizontal direction, so that the horizontal direction damping remains consistent.

[0058] In one embodiment, as shown in Figure 2 The elastic structure 4 is arranged at intervals in the circumferential direction. That is, the outer periphery of the functional platform 2 is connected with the inner wall of the tower drum by a ring of elastic structure 4.

[0059] Specifically, in one embodiment, such as Figure 2 As shown, the elastic structure 4 includes a spring 41 and a second fixing seat 42. One end of the spring 41 is connected to the outer peripheral wall of the functional platform 2, and the second fixing seat 42 is connected to the second end of the spring 41. The second fixing seat 42 can be connected to the inner wall of the tower by bolts. Furthermore, the spring 41 can be arranged in a direction perpendicular to the outer peripheral wall of the functional platform 2 in the horizontal plane.

[0060] It is worth noting that the elastic structure 4 set along the entire circumference of the functional platform 2 can ensure that the stiffness in the horizontal direction is basically consistent, thereby controlling the natural frequency of the functional platform 2 to be close to the frequency of the tower, and achieving effective vibration suppression in all directions.

[0061] According to an embodiment of the present invention, in another aspect, a wind turbine generator set is also provided, comprising: Tower; The aforementioned vibration damping device is installed inside the tower.

[0062] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A vibration suppression device for a wind turbine tower, characterized in that The damping device comprises a support mechanism (1) adapted to be connected with a tower drum; a functional platform (2) arranged above the support mechanism (1); a damping structure (3) connected between the support mechanism (1) and the functional platform (2); and an elastic structure (4) connected between an outer peripheral wall of the functional platform (2) and an inner wall of the tower drum. The functional platform (2) comprises a plurality of platform segments (21) arranged in sequence in a circumferential direction. The platform segment (21) comprises a block body (211) and an extension (212) connected to opposite sides of the block body (211) in the circumferential direction, and the extensions (212) of adjacent platform segments (21) are arranged in an overlapping manner and connected by fasteners. The damping device further comprises a locking structure (5) connected with the functional platform (2) and adapted to be connected with the tower drum. The locking structure (5) comprises a fixed rod (51) and a first fixed seat (52), one end of the fixed rod (51) is connected with an outer peripheral wall of the functional platform (2), and the first fixed seat (52) is connected to the other end of the fixed rod (51) and adapted to be connected with an inner wall of the tower drum.

2. A vibration suppression device suitable for use in a tower of a wind turbine according to claim 1, characterized in that The support mechanism (1) comprises a platform beam (11) and a connecting piece (12), a plurality of platform beams (11) are arranged in a cross manner, the connecting piece (12) is connected to an end of the platform beam (11), and the damping structure (3) is arranged at the intersection of a plurality of platform beams (11).

3. A vibration suppression device suitable for use with a wind turbine tower, according to claim 2, wherein, The damping device further comprises a steel strand hoop (6) connected with the platform beam (11) and arranged close to an end of the platform beam (11).

4. A vibration suppression device suitable for use in a wind turbine tower, according to any one of claims 1 to 3, characterised in that, The damping structure (3) comprises a first steel plate (31), a second steel plate (32), and a rubber piece (33) connected between the first steel plate (31) and the second steel plate (32), the first steel plate (31) is connected with the support mechanism (1), and the second steel plate (32) is connected with the functional platform (2).

5. A vibration suppression device suitable for use with a wind turbine tower section according to claim 4, characterised in that, The damping structure (3) is arranged in a spaced manner; and / or 6. A vibration suppression device suitable for use in a wind turbine tower, according to any one of claims 1 to 3, characterised in that, The elastic structure (4) is arranged in a spaced manner in a circumferential direction.

7. A vibration suppression device suitable for use with a wind turbine tower section according to claim 6, characterised in that, The damping device comprises a support mechanism (1) adapted to be connected with a tower drum; a functional platform (2) arranged above the support mechanism (1); a damping structure (3) connected between the support mechanism (1) and the functional platform (2); and an elastic structure (4) connected between an outer peripheral wall of the functional platform (2) and an inner wall of the tower drum.

8. A vibration suppression device suitable for use in a wind turbine tower, according to any one of claims 1 to 3, characterised in that, ​ 9. A vibration suppression device suitable for use in a wind turbine tower, according to any one of claims 1 to 3, characterised in that, ​ ​ 10. A wind power unit characterized by ​ ​ ​

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