Embedded sliding tuning column device for reducing top vibration of fan tower drum

Abstract

The invention discloses an embedded sliding tuning column device for reducing vibration of the top of a fan tower. The embedded sliding tuning column device comprises the fan tower, a tuning column, an energy dissipation mechanism and a sliding mechanism. A vibration reduction ring is mounted at the top of the inner wall of the fan tower barrel; the tuning column is vertically mounted in an inner cavity of the fan tower barrel; the energy dissipation mechanism comprises a plurality of energy dissipation elements, and the energy dissipation elements are all installed between the outer side wall of the tuning column and the inner side wall of the fan tower. The number of the sliding mechanisms is at least two, the two sliding mechanisms are installed on the top and the bottom of the tuning column respectively, and the two sliding mechanisms are installed on the top and the bottom of the inner wall of the fan tower drum through rigid connecting pieces respectively. Horizontal bidirectional vibration response of the top of the fan tower is controlled, fan tower vibration caused by wind and earthquakes can be reduced, structural safety is improved, better control performance is achieved, construction is convenient, application is flexible, and manufacturing cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine vibration control, and in particular to an embedded sliding tuning column device for reducing the vibration of a wind turbine tower top. Background Art

[0002] Due to the increasing demand for electricity and the expectation for efficiency in the commercial market, modern wind turbines are built higher and higher to capture more energy. The wind turbine tower is the main supporting structure in the wind turbine generator set. It connects the wind turbine to the ground and provides the required height for the horizontal axis impeller. In addition to bearing the gravity of the unit itself, the tower also bears wind and seismic loads. The wind turbine tower is a tall structure with low inherent damping. When subjected to strong wind loads and seismic loads, it will produce excessive vibration response. The vibration response at the top of the wind turbine tower is the most unfavorable place. Therefore, it is necessary to take measures to reduce the vibration amplitude at the top of the wind turbine tower to improve its structural safety and extend its service life.

[0003] In the prior art, the traditional tuned mass damper (TMD) is installed in the limited space inside the wind turbine nacelle, resulting in limited control effect and complex construction. At the same time, the traditional TMD is mainly used to control the vibration response in a single direction, such as horizontal unidirectional vibration. However, under the action of wind load and seismic load, the wind turbine tower often produces complex vibrations in multiple directions. Therefore, the traditional TMD has shortcomings in controlling multi-directional vibration responses and is difficult to meet the high requirements of modern wind turbines for vibration reduction performance.

[0004] Therefore, an embedded sliding tuning column device is proposed to reduce the vibration of the top of the wind turbine tower. Summary of the invention

[0005] The object of the present invention is to provide an embedded sliding tuning column device for reducing the vibration of the top of a wind turbine tower, aiming to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides an embedded sliding tuning column device for reducing the vibration of the top of a wind turbine tower, comprising:

[0007] A wind turbine tower, wherein a vibration-damping ring is installed on the top of the inner wall of the wind turbine tower;

[0008] A tuning column, wherein the tuning column is vertically installed in the inner cavity of the wind turbine tower;

[0009] An energy dissipation mechanism, the energy dissipation mechanism comprising a plurality of energy dissipation elements, wherein the plurality of energy dissipation elements are installed between the outer side wall of the tuning column and the inner side wall of the wind turbine tower;

[0010] A sliding mechanism, wherein at least two sliding mechanisms are provided, and the two sliding mechanisms are respectively installed at the top and the bottom of the tuning column, and the two sliding mechanisms are respectively installed at the top and the bottom of the inner wall of the wind turbine tower through rigid connectors.

[0011] According to an embedded sliding tuning column device for reducing the vibration of the top of a wind turbine tower provided by the present invention, the two sliding mechanisms are respectively installed on the top and bottom of the tuning column through a plurality of high-strength bolts.

[0012] According to an embedded sliding tuning column device for reducing the vibration of the top of a wind turbine tower provided by the present invention, the wind turbine tower is a steel tower, a reinforced concrete tower or a steel-concrete composite tower.

[0013] According to an embedded sliding tuning column device for reducing the vibration of the top of a wind turbine tower provided by the present invention, a plurality of energy dissipation elements are arranged at equal intervals from top to bottom along the height direction of the tuning column.

[0014] According to an embedded sliding tuning column device for reducing vibration at the top of a wind turbine tower provided by the present invention, the energy dissipation element includes a rotational damper and a spring combination, the rotational damper is installed between the outer wall of the tuning column and the inner wall of the wind turbine tower, and the spring combination is installed on the rotational damper.

[0015] According to an embedded sliding tuning column device for reducing the vibration of the top of a wind turbine tower provided by the present invention, the sliding mechanism adopts a steel ball roller support or a sliding support.

[0016] According to an embedded sliding tuning column device for reducing vibration at the top of a wind turbine tower provided by the present invention, the rigid connector is a rigid plate, and the rigid plate is fixedly connected to the wind turbine tower via a flange.

[0017] According to the present invention, an embedded sliding tuning column device for reducing the vibration of the top of a wind turbine tower is provided, wherein the cross section of the tuning column is circular.

[0018] According to an embedded sliding tuning column device for reducing vibration at the top of a wind turbine tower provided by the present invention, the vibration-damping ring is made of high-performance vibration-damping material, and the high-performance vibration-damping material includes a high-damping rubber ring and a polyurethane ring.

[0019] The present invention discloses the following technical effects:

[0020] The present invention utilizes sufficient space within the top range of the wind turbine tower to flexibly adjust the diameter and length of the tuning column, thereby achieving a control design with a greater mass ratio, thereby improving the control effect and robust performance of the wind turbine tower vibration response;

[0021] The present invention can control the vibration response of the wind turbine under the action of wind and earthquake loads, and improve the safety of the structure. Under the action of wind and earthquake, the tuning column and the energy dissipation element together form a TMD system, and the frequency tuning between the tuning column and the tower is achieved through the energy dissipation element to achieve the effect of frequency modulation resonance. The horizontal and bidirectional vibration response of the top of the wind turbine tower can be controlled at the same time, and the vibration of the wind turbine tower caused by wind and earthquake can be reduced, so that the safety performance of the wind turbine tower is guaranteed. It not only has better control performance, but also is convenient for construction, flexible in application, and saves construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the wind turbine tower in the present invention;

[0025] Figure 3 It is a schematic diagram of the installation of the energy dissipation element and the wind turbine tower in the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the energy dissipation element in the present invention;

[0027] Figure 5 It is a schematic diagram of the internal structure of the wind turbine tower in the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the sliding device in the present invention.

[0029] Among them, 1. Wind turbine tower; 2. Tuning column; 3. Energy dissipation element; 4. Sliding device; 5. Vibration damping ring; 6. Rigid plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figure 1-Figure 6 The present invention provides an embedded sliding tuning column device for reducing the vibration of the top of a wind turbine tower, comprising:

[0033] A wind turbine tower 1, a vibration-damping ring 5 is installed on the top of the inner wall of the wind turbine tower 1;

[0034] A tuning column 2, the tuning column 2 is vertically installed in the inner cavity of the wind turbine tower 1;

[0035] An energy dissipation mechanism, the energy dissipation mechanism includes a plurality of energy dissipation elements 3, and the plurality of energy dissipation elements 3 are installed between the outer wall of the tuning column 2 and the inner wall of the wind turbine tower 1;

[0036] Sliding mechanism, at least two sliding mechanisms are provided, the two sliding mechanisms are respectively installed at the top and bottom of the tuning column 2, and the two sliding mechanisms are respectively installed at the top and bottom of the inner wall of the wind turbine tower 1 through rigid connectors;

[0037] With such arrangement, the present invention can flexibly adjust the diameter and length of the tuning column 2 by utilizing the sufficient space within the top range of the wind turbine tower 1, thereby realizing a control design with a greater mass ratio, thereby improving the control effect and robust performance of the vibration response of the wind turbine tower 1;

[0038] The present invention can control the vibration response of the wind turbine under the action of wind and earthquake loads, and improve the safety of the structure. Under the action of wind and earthquake, the tuning column 2 and the energy dissipation element 3 together form a TMD system, and the frequency tuning between the tuning column 2 and the wind turbine tower 1 is achieved through the energy dissipation element to achieve the effect of frequency modulation resonance. The horizontal and bidirectional vibration response of the top of the wind turbine tower can be controlled at the same time, and the vibration of the wind turbine tower 1 caused by wind and earthquake can be reduced, so that the safety performance of the wind turbine tower 1 is guaranteed. It not only has better control performance, but also is convenient for construction, flexible in application, and saves construction cost.

[0039] To further optimize the solution, the two sliding mechanisms are respectively installed on the top and bottom of the tuning column 2 by means of a number of high-strength bolts; the pre-tightening force is provided by the high-strength bolts to ensure the tight connection between the sliding mechanism and the tuning column 2, which not only enhances the overall stability of the structure, but also enables the sliding mechanism to more effectively transmit and disperse the force generated by the tuning column 2 during the sliding process. When the tuning column 2 slides in the wind turbine tower 1, the high-strength bolts can prevent the connection from loosening or falling off, thereby ensuring the continuity and reliability of the vibration reduction effect.

[0040] According to a further optimization scheme, the wind turbine tower 1 is a steel tower, a reinforced concrete tower or a steel-concrete composite tower; the steel-concrete composite tower is a segmented tower using a combination of a steel tower and a reinforced concrete tower, in which the steel tower is the upper section and the reinforced concrete tower is the lower section;

[0041] Steel towers have high strength and good wind pressure resistance, reinforced concrete towers have higher rigidity and bearing capacity, and steel-concrete composite towers combine the advantages of both. Different tower structures can be selected according to specific wind loads, seismic loads, geographical environment and other factors to ensure the overall stability and safety of the wind turbine tower.

[0042] A further optimization scheme is to arrange a plurality of energy dissipation elements 3 at equal intervals from top to bottom along the height direction of the tuning column 2; the energy dissipation elements 3 arranged at equal intervals can more effectively disperse and absorb vibration energy, and when the tuning column 2 produces relative movement with the wind turbine tower 1 during sliding, each energy dissipation element 3 can evenly bear and dissipate energy, thereby avoiding local overload and damage.

[0043] Further optimizing the solution, the energy dissipation element 3 includes a rotational damper and a spring combination, the rotational damper is installed between the outer wall of the tuning column 2 and the inner wall of the wind turbine tower 1, and the spring combination is installed on the rotational damper;

[0044] When the tuning column 2 generates relative movement with the wind turbine tower 1 during vibration, the rotational damper starts to work, absorbing and dissipating vibration energy; at the same time, the spring combination also deforms to further absorb and store energy. The combination of the rotational damper and the spring makes the energy dissipation element 3 more flexible and efficient in vibration control.

[0045] A further optimization scheme is that the sliding mechanism adopts a steel ball roller support or a sliding support; the steel ball roller support or the sliding support has a lower friction coefficient and a higher load-bearing capacity, which can ensure the stability and reliability of the tuning column 2 during the sliding process. When the tuning column 2 is subjected to vibration, the steel ball roller support or the sliding support can allow it to slide freely along a predetermined trajectory while reducing frictional resistance, thereby more effectively transmitting and dispersing vibration energy.

[0046] According to a further optimization scheme, the rigid connecting member adopts a rigid plate 6, and the rigid plate 6 is fixedly connected to the wind turbine tower 1 through a flange to form an integrated structure; the rigid plate 6 provides rigidity and stability.

[0047] According to a further optimization scheme, the cross-section of the tuning column 2 is circular. The circular cross-sectional shape enables the tuning column 2 to have better uniformity and stability when subjected to wind loads or seismic loads. The circular cross-sectional shape can also reduce the influence of wind resistance and vortex-induced vibration, thereby improving the vibration reduction effect of the entire device. At the same time, the circular cross-sectional shape is also easy to process and install, reducing the manufacturing cost and construction difficulty.

[0048] To further optimize the solution, the vibration damping ring 5 is made of high-performance vibration damping materials, and the high-performance vibration damping materials include high-damping rubber rings and polyurethane rings; the high-damping rubber rings and polyurethane rings have excellent damping performance and elastic recovery ability. When the wind turbine tower 1 is subjected to vibration, the vibration damping ring 5 can absorb and dissipate part of the vibration energy, thereby reducing the vibration amplitude and extending the service life of the structure; in addition, the high-damping rubber ring and polyurethane ring materials also have good weather resistance and corrosion resistance, and can adapt to various harsh environmental conditions.

[0049] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, 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 should not be understood as a limitation on the present invention.

[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For ordinary technical users in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An embedded sliding tuning column device for reducing the vibration of the top of a wind turbine tower, characterized in that: include: A wind turbine tower (1), wherein a vibration-damping ring (5) is installed on the top of the inner wall of the wind turbine tower (1); A tuning column (2), wherein the tuning column (2) is vertically installed in the inner cavity of the wind turbine tower (1); An energy dissipation mechanism, the energy dissipation mechanism comprising a plurality of energy dissipation elements (3), wherein the plurality of energy dissipation elements (3) are installed between the outer side wall of the tuning column (2) and the inner side wall of the wind turbine tower (1); A sliding mechanism, wherein at least two sliding mechanisms are provided, and the two sliding mechanisms are respectively mounted on the top and bottom of the tuning column (2), and the two sliding mechanisms are respectively mounted on the top and bottom of the inner wall of the wind turbine tower (1) through rigid connectors.

2. The embedded sliding tuning column device for reducing the vibration of the top of the wind turbine tower according to claim 1 is characterized in that: The two sliding mechanisms are respectively installed on the top and bottom of the tuning column (2) through a plurality of high-strength bolts.

3. The embedded sliding tuning column device for reducing the vibration of the top of the wind turbine tower according to claim 1 is characterized in that: The wind turbine tower (1) is a steel tower, a reinforced concrete tower or a steel-concrete composite tower.

4. The embedded sliding tuning column device for reducing the vibration of the top of the wind turbine tower according to claim 1 is characterized in that: The plurality of energy dissipation elements (3) are arranged at equal intervals from top to bottom along the height direction of the tuning column (2).

5. The embedded sliding tuning column device for reducing the vibration of the top of the wind turbine tower according to claim 1 is characterized in that: The energy dissipation element (3) comprises a rotational damper and a spring combination, wherein the rotational damper is installed between the outer wall of the tuning column (2) and the inner wall of the wind turbine tower (1), and the spring combination is installed on the rotational damper.

6. The embedded sliding tuning column device for reducing the vibration of the top of the wind turbine tower according to claim 1 is characterized in that: The sliding mechanism adopts a steel ball roller support or a sliding support.

7. The embedded sliding tuning column device for reducing the vibration of the top of the wind turbine tower according to claim 1 is characterized in that: The rigid connecting member is a rigid plate (6), and the rigid plate (6) is fixedly connected to the wind turbine tower (1) via a flange.

8. The embedded sliding tuning column device for reducing the vibration of the top of the wind turbine tower according to claim 1 is characterized in that: The cross section of the tuning column (2) is circular.

9. The embedded sliding tuning column device for reducing the vibration of the top of the wind turbine tower according to claim 7 is characterized in that: The vibration-damping ring (5) is made of high-performance vibration-damping material, and the high-performance vibration-damping material comprises a high-damping rubber ring and a polyurethane ring.

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