CN220828302U - Wind turbine blade vibration damper and wind turbine blade - Google Patents
Wind turbine blade vibration damper and wind turbine blade Download PDFInfo
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- CN220828302U CN220828302U CN202322465317.XU CN202322465317U CN220828302U CN 220828302 U CN220828302 U CN 220828302U CN 202322465317 U CN202322465317 U CN 202322465317U CN 220828302 U CN220828302 U CN 220828302U
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- box body
- blade
- wind turbine
- turbine blade
- vibration damping
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- 238000013016 damping Methods 0.000 claims abstract description 20
- 238000005192 partition Methods 0.000 claims abstract description 8
- 230000009467 reduction Effects 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Abstract
The utility model discloses a wind turbine blade vibration damper and a wind turbine blade, comprising a plurality of vibration damper units arranged between two webs in the blade, wherein the vibration damper units are sequentially arranged along the direction from the blade root to the blade tip, and every two adjacent vibration damper units are separated by a first partition board; each vibration damping unit comprises two impact dampers, an area where each vibration damping unit is located is divided into an upper cavity and a lower cavity through a second partition plate, the two impact dampers are respectively arranged inside the two cavities, each impact damper comprises a box body, a plurality of springs and a single pendulum ball, the left side and the right side of the box body are respectively connected with two webs through the springs, the top and the bottom of the box body are respectively connected with the top and the bottom of the cavity through connecting ropes, the plurality of single pendulum balls are arranged in the box body, and each single pendulum ball is respectively connected with the top of the box body through the connecting ropes. The utility model can effectively reduce the amplitude of the large-scale wind turbine blade in the shimmy direction.
Description
Technical Field
The utility model relates to the technical field of renewable new energy wind driven generator blades, in particular to a wind driven generator blade vibration damper and a wind driven generator blade.
Background
As wind turbine blades are developed towards larger sizes, the blades become longer and longer, and research on vibration control of the large wind turbine blades has become a necessary requirement for development of the wind power industry. The wind turbine blade vibration reduction method has the advantages that expert scholars at home and abroad do a great deal of work in the aspect of wind turbine blade vibration reduction, various research results are increased year by year, active control is generally adopted at present to change the natural frequency characteristic and aerodynamic characteristic of the blade or auxiliary devices are additionally arranged on the surface of the blade through passive control to reduce the vibration of the blade, but the research on the vibration control of the large wind turbine blade is relatively less, and the vibration reduction method has limited functions in the vibration control of the large wind turbine blade. In order to effectively reduce the occurrence frequency of large-scale wind turbine accidents, further exploration is needed in the aspect of the research on the vibration control of large-scale wind turbine blades.
Disclosure of utility model
The utility model aims to overcome the defects of the prior art and provides a wind turbine blade vibration damper which can effectively reduce the amplitude of a large wind turbine blade in the shimmy direction.
It is a further object of the present utility model to provide a wind turbine blade.
The aim of the utility model can be achieved by adopting the following technical scheme:
A wind turbine blade vibration damper comprises a plurality of vibration damper units arranged between two webs in a blade, wherein the vibration damper units are sequentially arranged along the direction from the blade root to the blade tip, and every two adjacent vibration damper units are separated by a first partition plate; each vibration damping unit comprises two impact dampers, an area where each vibration damping unit is located is divided into an upper cavity and a lower cavity through a second partition plate, the two impact dampers are respectively arranged in the two cavities, each impact damper comprises a box body, a plurality of springs and a single pendulum ball, the left side and the right side of the box body are respectively connected with two webs through the springs, the top and the bottom of each box body are respectively connected with the top and the bottom of the cavity through connecting ropes, the plurality of single pendulum balls are arranged in the box body, each single pendulum ball is respectively connected with the top of the box body through the connecting ropes, and the plurality of single pendulum balls do circular motion in the box body to generate mutual collision so as to reduce the amplitude of the blade shimmy direction.
Further, an arc-shaped slideway for limiting the movement direction and the movement range of the single pendulum ball is formed at the bottom of the box body.
Further, the top and the bottom of the box body are respectively provided with a rotating device used for limiting the movement range of the box body when the blades vibrate.
Further, the cavity is located one side close to the blade shell and is provided with a rubber pad, and the box body is connected with the rubber pad through a connecting rope and is used for reducing collision between the box body and the blade when the blade swings.
Further, the number of the single pendulum balls is three.
Further, the number of the springs is six.
Further, the connecting rope is a steel wire rope.
The other object of the utility model can be achieved by adopting the following technical scheme:
A wind turbine blade comprises the wind turbine blade vibration damper.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
1. the vibration damper can realize the mutual conversion of mechanical energy, spring potential energy and kinetic energy, and can reduce the risk of aeroelastic instability of the blade while consuming the blade tip energy to the maximum extent.
2. The vibration damper has simple structure and small volume, can overcome the limitation of the blade tip space, and can reduce the vibration amplitude of the whole blade by adding the vibration damper from the blade root to the blade tip, thereby greatly reducing the risk of blade accident.
Drawings
Fig. 1 is a schematic structural view of a vibration damping device according to the present utility model.
Fig. 2 is a schematic structural view of a single vibration damping unit of the present utility model.
Fig. 3 is a cross-sectional view taken along A-A of fig. 2.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.
Example 1:
As shown in fig. 1 to 3, the present embodiment provides a wind turbine blade vibration damping device, which includes a plurality of vibration damping units 1 disposed between two webs 3 inside a blade 2, the vibration damping units are sequentially disposed along the direction from the blade root to the blade tip of the blade 2, and two adjacent vibration damping units are separated by a first partition board 4, so as to avoid mutual influence between the adjacent vibration damping units.
Each vibration reduction unit 1 comprises two impact dampers, the area where each vibration reduction unit is located is divided into an upper cavity and a lower cavity through a second partition board 5, the two impact dampers are respectively arranged in the two cavities, when the blade 2 vibrates, the two separated impact dampers can do interference-free movement, vibration reduction effects of different degrees can be achieved, and further vibration reduction effects are exerted to a greater degree. Each impact damper comprises a box body 101, a plurality of springs 102 and a single pendulum ball 103, wherein the left side and the right side of the box body 101 are respectively connected with two webs 3 through the plurality of springs 102, the number of the springs 102 can be set according to actual demands, six springs are taken as examples in the embodiment, two ends of each spring 102 are respectively and vertically connected with the webs 3 and the outer wall of the box body 101, the top and the bottom of the box body 101 are respectively connected with the top and the bottom of a cavity through connecting ropes 104 (preferably steel ropes), the plurality of single pendulum balls 103 are arranged in the box body 101, the number of the single pendulum balls 103 can be set according to actual demands, three single pendulum balls 103 are respectively connected with the top of the box body 101 through connecting ropes 104, and the plurality of single pendulum balls 103 do circular motion in the box body 101 to generate mutual collision so as to cut the amplitude of the blade 2 in the oscillation direction.
Specifically, the bottom of the case 101 is formed with an arc-shaped slide 105. When the blade 2 does not vibrate, the three single pendulum balls 103 rest at rest on the bottom of the arc-shaped slideway 105; when the blade 2 vibrates, the movement direction and the movement range of the single pendulum ball 103 are limited through the arc-shaped slideway 105, so that the centrifugal effect of the single pendulum ball 103 caused by the overlarge movement range is avoided.
Specifically, the top and bottom of the case 101 are provided with rotation means (not shown) for restricting the range of motion of the case 101 when the blade 2 vibrates, respectively.
Specifically, a rubber pad 106 is arranged on one side of the cavity, which is close to the shell of the blade 2, and the box body 101 is connected with the rubber pad through a connecting rope 104, so that collision between the box body 101 and the blade 2 is reduced when the blade 2 swings.
When the wind speed is high, the vane can vibrate greatly under the periodic aerodynamic force due to the flow separation generated on the surface of the airfoil. When the blade vibrates by a wide margin, the kinetic energy of the blade can be converted into the mechanical energy of the circular motion of the single pendulum balls, and collision energy consumption is generated through the motion between the single pendulum balls, so that the shimmy amplitude of the blade is reduced, meanwhile, part of the kinetic energy can be converted into elastic potential energy through the action of the spring, the shimmy amplitude of the blade is further reduced, and the effect of inhibiting the vibration of the blade is achieved. It should be noted that, due to the difference in the movement direction of the single pendulum ball at different positions, different phase differences are generated, but the vibration of the blade is generally inhibited.
The vibration damper of this embodiment is one-way power consumption device, can reduce the deformation of blade shimmy direction to the maximum extent, reduces the risk that the blade takes place the aeroelastic unstability when increasing blade life-span, unloads the blade through the conversion between the energy to realize blade vibration by a wide margin.
Example 2:
The embodiment provides a wind turbine blade, which comprises the wind turbine blade vibration damper.
The above description is only of the preferred embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive conception of the present utility model equally within the scope of the disclosure of the present utility model.
Claims (8)
1. The utility model provides a wind turbine blade vibration damper which characterized in that: the blade comprises a plurality of vibration reduction units arranged between two webs in the blade, wherein the vibration reduction units are sequentially arranged along the direction from the blade root to the blade tip, and every two adjacent vibration reduction units are separated by a first partition plate; each vibration damping unit comprises two impact dampers, an area where each vibration damping unit is located is divided into an upper cavity and a lower cavity through a second partition plate, the two impact dampers are respectively arranged in the two cavities, each impact damper comprises a box body, a plurality of springs and a single pendulum ball, the left side and the right side of the box body are respectively connected with two webs through the springs, the top and the bottom of each box body are respectively connected with the top and the bottom of the cavity through connecting ropes, the plurality of single pendulum balls are arranged in the box body, each single pendulum ball is respectively connected with the top of the box body through the connecting ropes, and the plurality of single pendulum balls do circular motion in the box body to generate mutual collision so as to reduce the amplitude of the blade shimmy direction.
2. The wind turbine blade vibration damping device according to claim 1, wherein: the bottom of the box body is provided with an arc-shaped slideway for limiting the movement direction and the movement range of the single pendulum ball.
3. The wind turbine blade vibration damping device according to claim 1, wherein: the top and the bottom of the box body are respectively provided with a rotating device used for limiting the movement range of the box body when the blades vibrate.
4. The wind turbine blade vibration damping device according to claim 1, wherein: the cavity is located one side close to the blade shell and is provided with a rubber pad, and the box body is connected with the rubber pad through a connecting rope and is used for reducing collision between the box body and the blade when the blade swings.
5. The wind turbine blade vibration damping device according to claim 1, wherein: the number of the single pendulum balls is three.
6. The wind turbine blade vibration damping device according to claim 1, wherein: the number of the springs is six.
7. The wind turbine blade vibration damping device according to claim 1, wherein: the connecting rope is a steel wire rope.
8. A wind turbine blade, characterized in that: comprising a wind turbine blade vibration damping device according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322465317.XU CN220828302U (en) | 2023-09-12 | 2023-09-12 | Wind turbine blade vibration damper and wind turbine blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322465317.XU CN220828302U (en) | 2023-09-12 | 2023-09-12 | Wind turbine blade vibration damper and wind turbine blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220828302U true CN220828302U (en) | 2024-04-23 |
Family
ID=90726524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322465317.XU Active CN220828302U (en) | 2023-09-12 | 2023-09-12 | Wind turbine blade vibration damper and wind turbine blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220828302U (en) |
-
2023
- 2023-09-12 CN CN202322465317.XU patent/CN220828302U/en active Active
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