Multi-prestressed cable-constrained detached mass TMD wind turbine tower damping device

Abstract

The application discloses a multi-prestressed cable-constrained separated mass TMD wind power tower cylinder damper, and relates to the technical field of wind power tower cylinder structure vibration control. The damper comprises a mass platform arranged on the inner side of the top of the tower cylinder, wherein the upper surface of the mass platform is provided with a recess; a plurality of upper cables and lower cables are connected with the upper and lower edges of the mass platform and the inner wall of the tower cylinder; a mass block is arranged above the mass platform, and the lower part of the mass block is provided with a protrusion matched with the recess, so that the mass block can swing relative to the platform; an additional mass body is fixed to the outer side of the mass block; and a plurality of inertial damper devices are connected between the additional mass body and the inner wall of the tower cylinder. The damper effectively controls the first-order mode wind-induced vibration of the wind power tower cylinder by arranging the swing mass system and the prestressed cable constraint system in the limited space at the top of the tower; the multidirectional swing of the mass block generates high-efficiency inertial force, the mass efficiency and energy dissipation of the inertial damper device are combined, and the functions of multidimensional vibration reduction, adjustable stiffness and automatic reset are realized.

Description

Technical Field

[0001] This invention relates to the field of vibration control technology for wind turbine tower structures, and more specifically to a separated mass TMD wind turbine tower vibration damper with multiple prestressed cable constraints. Background Technology

[0002] Wind energy, as a renewable and clean energy source, has attracted widespread attention and research worldwide. With the continuous iteration and advancement of wind turbine generators, the height of wind turbine towers has gradually increased, and the mass at the top of the tower has also grown, resulting in highly flexible structures. Under wind loads, the dynamic response of the structure is significantly enhanced, potentially even affecting the normal operation of the entire wind turbine tower. Therefore, controlling the wind-induced vibration response of wind turbine tower structures has become an urgent problem to be solved, and the development of vibration reduction and control devices is a key aspect of this process.

[0003] Currently, tuned mass damping systems are the main technical means to control the wind-induced vibration response of wind turbine towers, and there has been a large amount of research and patent reporting. However, existing technologies still have the following prominent problems:

[0004] Firstly, due to the limited installation space inside the tower, traditional tuned mass dampers are difficult to effectively control the first-order vibration mode of the wind turbine tower. If the mass block is suspended at the bottom of the tower, the mass block cannot obtain enough space to move. If the mass block is placed at the top of the tower and connected to the bottom of the tower through prestressed cables, the cables are too long, and it is difficult to solve the problems of prestressing tension and prestress loss.

[0005] Secondly, the existing device has a single direction of motion for the mass block, which cannot achieve efficient multi-dimensional vibration reduction.

[0006] Therefore, there is an urgent need for a new type of vibration damping device that can effectively control the first-order vibration mode within a limited tower top space and has multi-directional vibration damping capability. Summary of the Invention

[0007] In view of this, the present invention provides a separated mass TMD wind turbine tower vibration damper with multiple prestressed cable constraints, aiming to solve the above-mentioned technical problems.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper includes: a wind turbine tower; and further includes: A quality platform is provided on the inner side of the top of the wind turbine tower, and the upper surface of the quality platform is provided with a recess. The system includes multiple upper and lower cables. The upper edge of the mass platform is connected to the inner wall of the wind turbine tower via the upper cables, and the lower edge of the mass platform is connected to the inner wall of the wind turbine tower via the lower cables. A mass block is disposed above the mass platform. The lower part of the mass block has a protrusion that mates with the recess of the mass platform, allowing the mass block to swing relative to the mass platform. An additional mass body is fixedly disposed on the outside of the mass block; Multiple inertial capacitive dampers are connected between the additional mass and the inner wall of the wind turbine tower.

[0009] Through the above technical solution, the present invention, by setting a mass block and mass platform with a concave-convex oscillating structure on the inner side of the top of the wind turbine tower, and using multiple sets of upper and lower cables to provide adjustable constraint stiffness, combined with an additional mass body and an inertial-capacitive damper, can effectively control the first-order mode wind-induced vibration of the wind turbine tower within the limited space at the top of the tower. The free oscillation of the mass block can generate multi-directional inertial force, achieving efficient multi-dimensional vibration reduction. At the same time, the inertial-capacitive damper provides mass efficiency and energy dissipation, significantly improving the vibration reduction effect and having an automatic reset function.

[0010] Preferably, in the above-mentioned multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, the mass platform has a flat cylindrical structure, and the recess is an arc-shaped pit set at the center of the top surface of the mass platform.

[0011] Preferably, in the above-mentioned multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, the mass block includes an upper cylindrical structure and a lower hemispherical structure. The bottom end of the hemispherical structure forms the protrusion, which is embedded in the arc-shaped recess and can swing therein.

[0012] Preferably, in the above-mentioned multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, the mass block is made of iron material, and the cylindrical structure and the hemispherical structure are integrally formed.

[0013] Preferably, in the above-mentioned multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, the additional mass body is an annular lead block, which is fixed around the outside of the cylindrical structure.

[0014] Preferably, in the above-mentioned multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, the number of upper cables is four, and they are evenly distributed circumferentially along the upper edge of the mass platform; the number of lower cables is four, and they are evenly distributed circumferentially along the lower edge of the mass platform.

[0015] Preferably, in the above-mentioned multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, the number of inertial capacitive dampers is eight, and they are evenly distributed along the outer circumferential direction of the additional mass body.

[0016] Preferably, in the above-mentioned multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, the upper cable and / or the lower cable are prestressed steel strands.

[0017] Preferably, in the above-mentioned multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, the upper and lower edges of the mass platform are respectively provided with cable connecting lugs, and the two ends of the upper and lower cables are respectively connected to the cable connecting lugs and the inner wall of the wind turbine tower through anchors.

[0018] Preferably, in the above-mentioned multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, the diameter of the mass platform is smaller than the inner diameter of the wind turbine tower, and the upper cable and the lower cable are both radially inwardly inclined to connect the mass platform to the inner wall of the wind turbine tower.

[0019] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, which has the following beneficial effects: 1. Overcoming spatial limitations and effectively controlling the first-order vibration mode: The vibration damper is installed as a whole on the top of the wind turbine tower, and the mass platform is constrained by multiple sets of prestressed cables, which solves the problem that the traditional solution cannot effectively control the first-order vibration mode due to the limited internal space of the tower.

[0020] 2. Multi-directional high-efficiency vibration reduction: The mass block and the mass platform adopt a convex-concave swing structure, which allows the mass block to swing freely and generate multi-directional inertial force, thereby achieving efficient control of multi-dimensional wind-induced vibration.

[0021] 3. Adjustable stiffness and automatic reset: By adjusting the prestress of the upper and lower cables, the stiffness required for the vibration reduction system can be flexibly set; the swing structure, combined with cable constraints, enables the mass block to automatically reset after swinging.

[0022] 4. Mass enhancement and energy dissipation: The addition of mass (such as lead blocks) increases the inertial force, and multiple inertial capacitive dampers provide inertial capacitive enhancement and additional damping, effectively dissipating vibration energy, suppressing excessive oscillation, and improving the overall vibration reduction performance. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1A schematic diagram of the installation structure of the TMD wind turbine tower vibration damper with multi-prestressed cable constraint provided by the present invention; Figure 2 A structural cross-sectional view of the TMD wind turbine tower vibration damper with multi-prestressed cable constraint provided by the present invention; Figure 3 A schematic diagram of the structure of the quality platform provided by the present invention; Figure 4 A schematic diagram of the structure of the mass block provided by the present invention.

[0025] in: 1-Wind turbine tower; 2-Mass platform; 3-Upper cable; 4-Lower cable; 5-Mass block; 6-Additional mass body; 7-Inertial-capacitive damper; 8-Concave part; 9-Convex part; 10-Cylindrical structure; 11-Hemispherical structure; 12-Cable connecting lug. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] See appendix Figure 1 and attached Figure 2 This invention discloses a multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, comprising: a wind turbine tower 1; and further comprising: Mass platform 2 is located on the inner side of the top of wind turbine tower 1, and the upper surface of mass platform 2 is provided with a recess 8. Multiple upper cables 3 and multiple lower cables 4 are provided. The upper edge of the mass platform 2 is connected to the inner wall of the wind turbine tower 1 through the upper cables 3, and the lower edge of the mass platform 2 is connected to the inner wall of the wind turbine tower 1 through the lower cables 4. Mass block 5 is positioned above mass platform 2. The lower part of mass block 5 has a protrusion 9 that cooperates with the recess 8 of mass platform 2, so that mass block 5 can swing relative to mass platform 2. An additional mass body 6 is fixedly disposed on the outside of the mass block 5; Multiple inertial capacitive dampers 7 are connected between the additional mass body 6 and the inner wall of the wind turbine tower 1.

[0028] See appendix Figure 3 The mass platform 2 has a flat cylindrical structure, and the recess 8 is an arc-shaped pit set at the center of the top surface of the mass platform 2.

[0029] See appendix Figure 4 The mass block 5 includes an upper cylindrical structure 10 and a lower hemispherical structure 11. The bottom end of the hemispherical structure 11 forms a protrusion 9, which is embedded in an arc-shaped recess and can swing within it.

[0030] In this embodiment, the mass block 5 is made of iron, and the cylindrical structure 10 and the hemispherical structure 11 are integrally formed.

[0031] In this embodiment, the additional mass 6 is a ring-shaped lead block, which is fixed around the outside of the cylindrical structure 10.

[0032] In this embodiment, there are four upper pull cables 3, which are evenly distributed along the upper edge of the mass platform 2; there are four lower pull cables 4, which are evenly distributed along the lower edge of the mass platform 2.

[0033] In this embodiment, there are eight inertial capacitive dampers 7, which are evenly distributed along the outer circumference of the additional mass body 6.

[0034] In this embodiment, the upper cable 3 and / or the lower cable 4 are prestressed steel strands.

[0035] To further optimize the above technical solution, cable connecting lugs 12 are provided on the upper and lower edges of the quality platform 2, and the two ends of the upper cable 3 and the lower cable 4 are connected to the cable connecting lugs 12 and the inner wall of the wind turbine tower 1 through anchors.

[0036] To further optimize the above technical solution, the diameter of the mass platform 2 is smaller than the inner diameter of the wind turbine tower 1, and the upper cable 3 and the lower cable 4 are both connected to the inner wall of the mass platform 2 and the wind turbine tower 1 by radially inward inclination.

[0037] The working principle of this embodiment is as follows: When the wind turbine tower 1 vibrates under wind load, the top of the tower will generate a horizontal reciprocating motion. At this time, the mass block 5 set at the top of the tower will lag behind the mass platform 2 due to inertia. The hemispherical protrusion 9 at the bottom of the mass block 5 will swing freely within the arc-shaped concave part 8 of the mass platform 2, forming an oscillating motion that is opposite to or has a phase difference with the direction of the tower's vibration. The mass block 5 itself and the additional mass body 6 together generate a large inertial force, which acts in the opposite direction on the tower, thereby offsetting part of the wind-induced vibration energy.

[0038] Meanwhile, the mass platform 2 is connected to the inner wall of the tower via upper cable 3 and lower cable 4, and multiple sets of prestressed cables provide the required restoring stiffness for the entire vibration reduction system. When the mass block 5 sways, it will drive the mass platform 2 and the cable system to work together. The prestress of the cables can adjust the system stiffness to adapt to different working conditions.

[0039] In addition, multiple inertial-capacitive dampers 7 fixed to the outside of the mass block 5 generate relative motion between the mass block 5 and the inner wall of the tower. On the one hand, the inertial-capacitive dampers 7 achieve mass enhancement through the inertial-capacitive effect (i.e., generate an equivalent larger inertial force with a smaller physical mass), and on the other hand, provide additional damping, dissipate vibration energy, suppress excessive swaying of the mass block 5, and accelerate its reset.

[0040] In summary, through the synergistic effect of the swaying mass system, the prestressed cable constraint system, and the inertial-capacitive damping system, this invention can effectively control the first-order mode wind-induced vibration of the wind turbine tower and achieve efficient vibration reduction within the limited space at the top of the tower.

[0041] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper, comprising: Wind turbine tower (1); characterized in that it further includes: The mass platform (2) is located on the inner side of the top of the wind turbine tower (1), and the upper surface of the mass platform (2) is provided with a recess (8). Multiple upper cables (3) and multiple lower cables (4) are provided. The upper edge of the mass platform (2) is connected to the inner wall of the wind turbine tower (1) through the upper cables (3), and the lower edge of the mass platform (2) is connected to the inner wall of the wind turbine tower (1) through the lower cables (4). Mass block (5), the mass block (5) is disposed above the mass platform (2), and the lower part of the mass block (5) is provided with a protrusion (9) that cooperates with the recess (8) of the mass platform (2), so that the mass block (5) can swing relative to the mass platform (2); An additional mass body (6) is fixedly disposed on the outside of the mass block (5); Multiple inertial capacitive dampers (7) are connected between the additional mass (6) and the inner wall of the wind turbine tower (1).

2. The multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper according to claim 1, characterized in that, The mass platform (2) has a flat cylindrical structure, and the recess (8) is an arc-shaped pit located at the center of the top surface of the mass platform (2).

3. The multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper according to claim 2, characterized in that, The mass block (5) includes an upper cylindrical structure (10) and a lower hemispherical structure (11), the bottom end of which forms the protrusion (9), which is embedded in the arc-shaped recess and can swing therein.

4. The multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper according to claim 3, characterized in that, The mass block (5) is made of iron, and the cylindrical structure (10) and the hemispherical structure (11) are integrally formed.

5. The multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper according to claim 2, characterized in that, The additional mass (6) is a ring-shaped lead block, which is fixed around the outside of the cylindrical structure (10).

6. The multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper according to claim 1, characterized in that, The number of upper cables (3) is four, and they are evenly distributed along the upper edge of the mass platform (2); the number of lower cables (4) is four, and they are evenly distributed along the lower edge of the mass platform (2).

7. The multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper according to claim 1, characterized in that, The number of the inertial capacitive dampers (7) is eight, and they are evenly distributed along the outer circumference of the additional mass (6).

8. The multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper according to claim 1, characterized in that, The upper cable (3) and / or the lower cable (4) are prestressed steel strands.

9. The multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper according to claim 1, characterized in that, The upper and lower edges of the mass platform (2) are respectively provided with cable connecting lugs (12), and the two ends of the upper cable (3) and the lower cable (4) are respectively connected to the cable connecting lugs (12) and the inner wall of the wind turbine tower (1) through anchors.

10. A multi-prestressed cable-constrained separated mass TMD wind turbine tower vibration damper according to claim 1, characterized in that, The diameter of the mass platform (2) is smaller than the inner diameter of the wind turbine tower (1). The upper cable (3) and the lower cable (4) are both radially inclined inward to connect the mass platform (2) and the inner wall of the wind turbine tower (1).

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