CN216975654U - Offshore wind driven generator with adjustable frequency band liquid damper - Google Patents
Offshore wind driven generator with adjustable frequency band liquid damper Download PDFInfo
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- CN216975654U CN216975654U CN202220017760.3U CN202220017760U CN216975654U CN 216975654 U CN216975654 U CN 216975654U CN 202220017760 U CN202220017760 U CN 202220017760U CN 216975654 U CN216975654 U CN 216975654U
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Abstract
The utility model discloses an offshore wind driven generator with an adjustable frequency band liquid damper, which comprises: the wind driven generator tower cylinder is connected with the lower pile body and extends into the lower pile body for a set distance; and a damper is connected between the lower end of the fan tower cylinder and the inner wall of the lower pile body. The fan tower drum extending into the pile body converts the corner of the connecting node into the swing displacement of the lower end, the tension-compression type damper can fully play a role under the swing displacement, and the tuning and damping have larger design space.
Description
Technical Field
The utility model relates to the technical field of wind driven generators, in particular to an offshore wind driven generator with an adjustable frequency band liquid damper.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The wind driven generator is a device for converting wind energy into electric energy, and the tower drum of the wind driven generator mainly plays a supporting role in the wind driven generator set and absorbs the vibration of the wind driven generator set. With the continuous increase of the power generation power of the wind generating set, the height of the tower barrel of the wind driven generator is also continuously increased. The tower barrel not only supports the engine room and the blades, but also needs to bear huge bending moment generated by external forces such as wind load and the like; the wind turbine tower barrel is easy to generate resonance damage under the action of fluctuating wind load and wind turbine generator vibration load, and the fatigue damage effect in the service life period is obvious.
The tuned damping device can change the participating mass and vibration damping of the structure, and is widely applied to a vibration structure system. The existing tuned damping devices mainly have two types: tuned mass damping and tuned liquid damping, wherein the tuned mass damping not only requires large deformation and volume, but also increases the construction cost of the mass block; when the liquid tuned damping is used independently, the damping capacity of the liquid tuned damping is realized only by the shaking of the liquid, and the liquid tuned damping has certain limitation at a high-frequency stage; moreover, the traditional tuning liquid damper is mostly of a cylindrical structure, and the volume of the damper is consistent from top to bottom, so that the wind turbine tower barrel is directly transited to the sea level from the bottom of the sea level to the top of the sea level, and the stability of the wind turbine is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides an offshore wind driven generator with an adjustable frequency band liquid damper, which has the advantages of obvious damping effect, uniform mass change and better structural integrity and vibration characteristics.
In some embodiments, the following technical scheme is adopted:
an offshore wind turbine with adjustable frequency band liquid damper, comprising: the wind driven generator tower cylinder is connected with the lower pile body and extends into the lower pile body for a set distance; and a damper is connected between the lower end of the fan tower cylinder and the inner wall of the lower pile body.
As a further scheme, a conical water tank is arranged in the lower pile body, and the caliber of the conical water tank is gradually reduced from bottom to top.
As a further solution, the conical tank is arranged near sea level.
As a further scheme, the fan tower cylinder is connected with the lower pile body through a connecting node.
As a further scheme, the connecting node is a welding node or a bolt node.
As a further scheme, the connecting node is arranged on the outer side of the wind turbine tower and close to the upper end of the lower pile body.
As a further scheme, stiffening rings are respectively arranged at the connecting positions of the damper, the fan tower and the lower pile body.
As a further scheme, the damper is a tension-compression type damper.
Compared with the prior art, the utility model has the beneficial effects that:
(1) the frequency-adjustable offshore wind driven generator with the liquid damper is characterized in that the damper is connected between the lower end of the fan tower cylinder and the inner wall of the lower pile body, the node has rigidity, the connecting node can rotate, the lower end of the tower cylinder extending into the pile body can swing (equivalent to the lower part of the tower cylinder swinging when rotating at a corner), and the spring damper deforms by utilizing the swinging, so that the function is achieved.
(2) The fan tower drum extending into the pile body converts the corner of the connecting node into the swing displacement of the lower end, the tension-compression type damper can fully play a role under the swing displacement, and the tuning and damping have larger design space.
(3) The conical water tank plays a role of a liquid damper in the structure, and can adjust the vibration quality to reduce the structural vibration; the conical water tank enables the structure to gradually transit near the water surface, the change is even, the integrity and the vibration characteristic of the structure are better, the damping effect of the whole structure is obvious, and the construction and installation are convenient.
Additional features and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
Drawings
FIG. 1 is a schematic structural diagram of a tuned mass damping device in an embodiment of the present invention;
the wind power generation system comprises a wind power generation system, a wind power generation system and a wind power generation system, wherein 1, a lower pile body, 2, a wind power generation tower cylinder, 3, a connecting node, 4, a stiffening ring, 5, a tension-compression damper and 6, a conical water tank are arranged.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example one
In one or more embodiments, an offshore wind turbine with adjustable band liquid damper is disclosed, comprising: the wind power generation system comprises a wind turbine tower drum 2 and a lower pile body 1, wherein the wind turbine tower drum 2 is connected with the lower pile body 1 and extends into the lower pile body 1 for a set distance; a tension-compression type damper is connected between the lower end of the fan tower cylinder 2 and the inner wall of the lower pile body 1; a conical water tank 6 is arranged in the lower pile body 1, and the position of the conical water tank 6 can be preferably near the sea level.
Specifically, the lower pile body 1 is connected with a fan tower drum 2 through a connecting node 3; the lower end of the fan tower barrel 2 penetrates through the connecting node 3 and extends into the lower pile body 1 for a set distance; the connecting node 3 is arranged at the outer side of the fan tower cylinder 2 and the upper end of the lower pile body 1, and can be a welding node or a bolt node. The fan tower cylinder extending into the pile body converts the corner of the connecting node into the swing displacement of the lower end, the tension-compression type damper can fully play a role under the swing displacement, and the tuning and damping have larger design space.
The inner side of the tension-compression type damper 5 is connected with the lower end of a fan tower cylinder 2 extending into the pile body, and the outer side of the tension-compression type damper is connected with a lower pile body 1; stiffening rings 4 are respectively arranged at the connecting parts of the fan tower drum 2 and the lower pile body 1 with the tension-compression damper 5, and the stiffening rings 4 enhance the circumferential rigidity of the pile body or the tower drum at the connecting parts, so that the deformation and the rigidity enhancement caused by the local load action of the damper are avoided.
The conical water tank 6 is arranged in the lower pile body 1, and the position can be preferably near the sea level; the caliber of the conical water tank is gradually reduced from bottom to top; the conical water tank can be opened or closed, and can also be provided with a movable opening to facilitate liquid supplement.
The conical water tank 6 is formed by welding, and a proper amount of liquid is injected into the water tank; because the steel pipe below the sea level is flushed with water, no water exists above the sea level, and the caliber of the conical water tank is gradually changed, the uniform change of the mass can be realized, and the vibration characteristic of the structure is facilitated; there is water in the toper water tank 6, and when the structure vibration swayd, water had the hysteresis quality, and the structure vibration has delay time interval with water motion to can offset relevant vibration, increase the holistic damping of structure.
The conical water tank 6 in the embodiment plays a role of a liquid damper in the structure, and can adjust the vibration participating mass to reduce the structural vibration; the conical water tank 6 enables the quality of the structure near the water surface to be changed uniformly, and the structural integrity and the vibration frequency characteristic are better.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. An offshore wind turbine with adjustable frequency band liquid damper, comprising: the wind driven generator tower cylinder is connected with the lower pile body and extends into the lower pile body for a set distance; and a damper is connected between the lower end of the fan tower cylinder and the inner wall of the lower pile body.
2. The offshore wind turbine with adjustable frequency band liquid damper as claimed in claim 1, wherein a conical water tank is arranged inside the lower pile body, and the diameter of the conical water tank is gradually reduced from bottom to top.
3. The adjustable band liquid damper offshore wind turbine of claim 2, wherein the conical water tank is disposed near sea level.
4. The offshore wind turbine with adjustable band liquid damper of claim 1, wherein the wind turbine tower is connected with the lower pile body through a connection node.
5. The adjustable band liquid damper offshore wind turbine of claim 4, wherein the connection node is a welded node or a bolted node.
6. The offshore wind turbine with adjustable band liquid damper of claim 4, wherein the connection node is disposed outside the wind turbine tower and near the upper end of the lower pile body.
7. The offshore wind turbine with adjustable frequency band liquid damper as claimed in claim 1, wherein the position where the damper is connected with the wind turbine tower and the lower pile body is respectively provided with a stiffening ring.
8. The offshore wind turbine with adjustable band liquid damper of claim 1, wherein the damper is a tension and compression type damper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220017760.3U CN216975654U (en) | 2022-01-05 | 2022-01-05 | Offshore wind driven generator with adjustable frequency band liquid damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220017760.3U CN216975654U (en) | 2022-01-05 | 2022-01-05 | Offshore wind driven generator with adjustable frequency band liquid damper |
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| CN216975654U true CN216975654U (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220017760.3U Active CN216975654U (en) | 2022-01-05 | 2022-01-05 | Offshore wind driven generator with adjustable frequency band liquid damper |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199700A (en) * | 2022-09-09 | 2022-10-18 | 山西润世华新能源技术服务有限公司 | Composite tuned damper and wind generating set |
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2022
- 2022-01-05 CN CN202220017760.3U patent/CN216975654U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199700A (en) * | 2022-09-09 | 2022-10-18 | 山西润世华新能源技术服务有限公司 | Composite tuned damper and wind generating set |
| CN115199700B (en) * | 2022-09-09 | 2022-11-29 | 山西润世华新能源技术服务有限公司 | Composite tuned damper and wind generating set |
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