Wind power tower internal damping mechanism

Abstract

The utility model relates to the technical field of shock attenuation damping, specifically is a wind power tower drum inside shock attenuation damping mechanism, including setting up in the base stable plate of tower drum inside, the stable plate is hung in the inner top of tower drum through the pendant rope, four limiters are arranged between the base and the stable plate annularly and equiangularly, a plurality of viscous dampers are arranged between the bottom of base and tower drum annularly and equiangularly, four notches no.

Description

Technical Field

[0001] This utility model relates to the field of vibration damping technology, specifically a vibration damping mechanism inside a wind turbine tower. Background Technology

[0002] A wind turbine tower is the support structure of a wind turbine generator, primarily serving a supporting role while absorbing vibrations from the generator. The construction of wind turbine towers requires addressing vortex-induced vibration (VID). VID is a wind-induced vibration phenomenon that occurs in large-span towers under low wind speeds, causing the tower to sway and potentially break. To address VID, deflectors are installed on the tower during construction to disrupt the wind's trajectory and prevent the formation of stable vortices. This avoids destructive VID caused by vortexes matching the tower's own frequency. Additionally, suspended dampers are installed inside the tower. These dampers utilize the counter-inertial force of a pendulum to significantly suppress the amplitude of tower vibration.

[0003] Currently, the total weight of existing suspended tuned mass dampers is fixed during use. To cope with different wind forces, the total weight of the suspended tuned mass damper is usually adjusted to the maximum (within a reasonable range). Although this avoids the trouble of later weight adjustment, it keeps the suspension rope under constant load, leading to a decrease in rope strength and overall load-bearing capacity. Utility Model Content

[0004] The purpose of this invention is to provide a vibration damping mechanism inside a wind turbine tower to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A vibration damping mechanism inside a wind turbine tower includes a base stabilizing plate disposed inside the tower. The stabilizing plate is suspended from the inner top of the tower by a hanging rope. Four limiting members are arranged at equal angles in a ring between the base and the stabilizing plate. Multiple viscous dampers are arranged at equal angles in a ring between the bottom of the base and the tower. Four notches are opened at equal angles in a ring on the outer side of the stabilizing plate. Fixing members are provided on the bottom surface of the stabilizing plate.

[0007] The limiting component includes a lead screw rotatably connected to the outside of the base, and two nuts are screwed onto the outer wall of the lead screw.

[0008] Furthermore, the top surface of the stabilizing plate is fixedly connected with multiple locking teeth at the corresponding notches, the outer wall of the lead screw is slidably traversed by a moving block, and the bottom surface of the moving block is fixedly connected with multiple locking teeth that engage with the locking teeth at the corresponding positions.

[0009] Furthermore, the outer wall of the base is provided with four notches at equal angles, and the interior of each notch is rotatably connected to a rotating block that is fixedly connected to a lead screw at the corresponding position.

[0010] Furthermore, a washer ring is provided through the outer wall of the lead screw.

[0011] Furthermore, the fixing member includes a screw that is screwed through and engaged with the stabilizing plate, and a pressure plate is rotatably connected to the bottom end of the screw.

[0012] Furthermore, a rubber pad is fixedly connected to the bottom surface of the pressure plate, and a handwheel is fixedly connected to the top end of the screw.

[0013] Furthermore, a connecting seat is fixedly connected to the bottom surface of the base, and the viscous damper is movably connected between the connecting seat and the tower.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By removing one of the lead screws from the stabilizing plate and reducing the number of counterweights on the base, the total weight of the remaining counterweights on the base can completely resist the swaying force exerted on the tower by the wind in the future, thereby reducing the load on the suspension rope and extending its service life.

[0016] 2. By setting the screw and pressure plate, the stabilizing plate is prevented from directly contacting the uppermost counterweight, thus making it easy to add or remove counterweights on the base. Moreover, by engaging the first locking tooth with the corresponding second locking tooth, the stability of the screw can be increased, preventing displacement changes after the screw is suspended on the stabilizing plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the base in this utility model;

[0019] Figure 3 This is a schematic diagram of the stabilizing plate in this utility model;

[0020] Figure 4 This is a schematic diagram of the limiting component structure in this utility model;

[0021] Figure 5 This is a schematic diagram showing the positions of the base and the stabilizing plate in this utility model.

[0022] In the diagram: 1. Base; 11. Notch 1; 12. Connecting seat; 2. Stabilizing plate; 21. Notch 2; 22. Clamping tooth 1; 23. Screw; 24. Pressure plate; 25. Handwheel; 3. Limiting component; 31. Lead screw; 32. Moving block; 33. Washer ring; 34. Nut; 35. Rotating block; 4. Viscous damper; 5. Tower. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 - Figure 5 In this embodiment of the present invention, a shock-absorbing and damping mechanism inside a wind turbine tower includes a base 1 and a stabilizing plate 2 disposed inside the tower 5. The stabilizing plate 2 is suspended from the inner top of the tower 5 by a hanging rope. Four limiting members 3 are arranged at equal angles in an annular pattern between the base 1 and the stabilizing plate 2. Multiple viscous dampers 4 are arranged at equal angles in an annular pattern between the bottom of the base 1 and the tower 5. Four notches 21 are opened at equal angles in an annular pattern on the outer side of the stabilizing plate 2. A fixing member is provided on the bottom surface of the stabilizing plate 2. The limiting member 3 includes a lead screw 31 rotatably connected to the outer side of the base 1. Two nuts 34 are screwed onto the outer wall of the lead screw 31.

[0025] Specifically, firstly, the stabilizing plate 2 is suspended from the inner top of the tower 5 using a hanging rope. Then, two symmetrical nuts 34 are screwed onto the top of the lead screw 31. By rotating three of the lead screws 31, the top of the lead screw 31 is inserted into the corresponding notch 21. Then, by rotating the nuts 34, the stabilizing plate 2 is clamped between the symmetrically arranged nuts 34. At this time, the base 1 is suspended below the stabilizing plate 2 by the lead screw 31. Then, an appropriate amount of counterweight is placed on the top surface of the base 1. Then, another lead screw 31 is fixed to the stabilizing plate 2 in the same way. The fixing components apply downward pressure to the multiple counterweights, fixing the multiple counterweights to the base. Above 1, when the tower 5 is swayed by the wind, the stabilizing plate 2, the base 1, and multiple counterweights swing in the opposite direction to the tower 5. Under the action of multiple viscous dampers 4, most of the swaying force of the tower 5 is offset, thus ensuring the stability of the tower 5. When the staff observes the weather forecast and believes that the wind force will be relatively small and stable in the future, they remove one of the lead screws 31 from the stabilizing plate 2 and reduce the number of counterweights on the base 1. The total weight of the counterweights left on the base 1 can completely resist the swaying force of the wind applied to the tower 5 in the future, thereby reducing the load on the suspension rope and extending the service life of the suspension rope.

[0026] Example 1

[0027] like Figures 2-4 As shown, in this embodiment, the top surface of the stabilizing plate 2 is fixedly connected with multiple locking teeth 22 at the corresponding notch 21, the outer wall of the lead screw 31 is slidably connected with a moving block 32, the bottom surface of the moving block 32 is fixedly connected with multiple locking teeth 22 that engage with the locking teeth 22 at the corresponding positions, the outer wall of the base 1 is provided with four notches 11 at equal angles, the interior of the notches 11 is rotatably connected with a rotating block 35 that is fixedly connected to the lead screw 31 at the corresponding position, and the outer wall of the lead screw 31 is provided with a washer ring 33.

[0028] In this embodiment, a washer 33 and a moving block 32 are fitted onto the lead screw 31, and the washer 33 is supported by the nut 34 below. Then, the top end of the lead screw 31 is inserted into the notch 21 at the corresponding position, so that the washer 33 is close to the stabilizing plate 2. The multiple locking teeth 2 on the moving block 32 are engaged with the multiple locking teeth 1 22 at the corresponding position. Then, the moving block 32 is fixed by the nut 34 above, so that the moving block 32 is tightly locked in the multiple locking teeth 1 22 at the corresponding position.

[0029] Example 2

[0030] like Figure 3As shown, in this embodiment, the fixing component includes a screw 23 that is screwed through and engaged with the stabilizing plate 2. A pressure plate 24 is rotatably connected to the bottom end of the screw 23. A rubber pad is fixedly connected to the bottom surface of the pressure plate 24. A handwheel 25 is fixedly connected to the top end of the screw 23. A connecting seat 12 is fixedly connected to the bottom surface of the base 1. A viscous damper 4 is movably connected between the connecting seat 12 and the tower 5.

[0031] In this embodiment, when multiple counterweights are placed on the base 1 and limited by four lead screws 31, rotating the handwheel 25 can cause the screw 23 to move the pressure plate 24 downward, fixing the multiple counterweights on the base 1. When it is necessary to add or remove counterweights on the base 1, rotating the handwheel 25 in the opposite direction can disengage the pressure plate 24 from the uppermost counterweight. Rotating the two nuts 34 at one of the lead screws 31 can disengage the washer 33 at the corresponding position from the stabilizing plate 2, and disengage the first locking tooth 22 from the second locking tooth at the corresponding position. Then, the lead screw 31 can be removed from the notch 21. At this time, the operator can add or remove counterweights on the base 1. The setting of the screw 23 and the pressure plate 24 avoids the stabilizing plate 2 from directly contacting the uppermost counterweight, thus facilitating the addition or removal of counterweights on the base 1. Moreover, the engagement of the first locking tooth 22 with the second locking tooth at the corresponding position can increase the stability of the lead screw 31 and prevent displacement changes after the lead screw 31 is suspended on the stabilizing plate 2.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vibration damping mechanism inside a wind turbine tower, characterized in that, The base (1) and the stabilizing plate (2) are installed inside the tower (5). The stabilizing plate (2) is suspended from the top of the tower (5) by a hanging rope. Four limiting pieces (3) are arranged in a ring at equal angles between the base (1) and the stabilizing plate (2). Multiple viscous dampers (4) are arranged in a ring at equal angles between the bottom of the base (1) and the tower (5). Four notches (21) are opened in a ring at equal angles on the outer side of the stabilizing plate (2). Fixing pieces are provided on the bottom surface of the stabilizing plate (2). The limiting component (3) includes a lead screw (31) rotatably connected to the outside of the base (1), and two nuts (34) are screwed onto the outer wall of the lead screw (31).

2. The windmill tower inner shock-absorbing damping mechanism according to claim 1, characterized in that, The top surface of the stabilizing plate (2) is fixedly connected with multiple locking teeth (22) at the corresponding notch (21). The outer wall of the screw (31) is slidably connected with a moving block (32). The bottom surface of the moving block (32) is fixedly connected with multiple locking teeth (22) that engage with the locking teeth (22) at the corresponding positions.

3. The windmill tower inner shock-absorbing damping mechanism according to claim 2, characterized in that, The outer wall of the base (1) has four notches (11) at equal angles. The interior of the notch (11) is rotatably connected to a rotating block (35) that is fixedly connected to the lead screw (31) at the corresponding position.

4. The windmill tower inner shock-absorbing damping mechanism according to claim 3, characterized in that, A washer (33) is provided through the outer wall of the lead screw (31).

5. The windmill tower inner shock-absorbing damping mechanism according to claim 4, characterized in that, The fastener includes a screw (23) that is screwed through and engaged with the stabilizing plate (2), and a pressure plate (24) is rotatably connected to the bottom end of the screw (23).

6. The windmill tower inner shock-absorbing damping mechanism according to claim 5, characterized in that, A rubber pad is fixedly connected to the bottom surface of the pressure plate (24), and a handwheel (25) is fixedly connected to the top of the screw (23).

7. The windmill tower inner shock-absorbing damping mechanism according to claim 6, characterized in that, A connecting seat (12) is fixedly connected to the bottom surface of the base (1), and a viscous damper (4) is movably connected between the connecting seat (12) and the tower (5).

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