CN111441915A - Offshore wind turbine tower drum with variable natural frequency - Google Patents
Offshore wind turbine tower drum with variable natural frequency Download PDFInfo
- Publication number
- CN111441915A CN111441915A CN202010317217.0A CN202010317217A CN111441915A CN 111441915 A CN111441915 A CN 111441915A CN 202010317217 A CN202010317217 A CN 202010317217A CN 111441915 A CN111441915 A CN 111441915A
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- tower
- wind turbine
- offshore wind
- platforms
- turbine tower
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- 239000000178 monomer Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses an offshore wind turbine tower with variable natural frequency, which comprises a tower body, a plurality of platforms and a plurality of mass blocks, wherein the tower body is formed by a plurality of tower monomers which are stacked together along the vertical direction, each platform in the plurality of platforms is formed at the connecting part of two adjacent tower monomers, and at least some mass blocks in the plurality of mass blocks are arranged on the plurality of platforms. According to the invention, the mass block is added in the tower drum, so that the mass of the tower drum is increased on the premise of not changing the rigidity of the tower drum, the natural frequency of the tower drum is further changed, and the resonance damage of the tower drum can be effectively avoided.
Description
Technical Field
The invention relates to a tower drum technology, in particular to an offshore wind turbine tower drum with variable natural frequency.
Background
With the continuous development of onshore wind resources, onshore wind farm construction has gradually become saturated. After the oil crisis in the 70 s of the 20 th century, a new era of wind energy utilization began, and many countries in the world began to make plans considering the development of offshore wind farms. Compared with a land fan, the offshore fan has a worse working environment, and particularly has more technical challenges in China sea areas with frequent typhoons and earthquakes. The tower barrel is used as an important bearing part of the wind turbine and plays an important role in the design of the wind turbine. When wind passes through the tower, vortices are alternately generated on both sides of the tower, which are detached from the surface of the tower. This alternately generated vortex in turn generates a periodically varying pulsating pressure on the tower. The pulsating pressure will cause periodic oscillations of the tower, which in turn will change the vortex shedding pattern of its wake. The problem of fluid interaction with structures is known as "vortex-induced vibration," which can cause resonant failure of the tower if the natural frequency of the tower is close to the frequency of the vortex. In addition, if the natural frequency of the whole fan system is close to the 1P or 3P frequency, the tower can also be damaged by resonance.
Disclosure of Invention
The invention aims to solve the existing problems and provides an offshore wind turbine tower with variable natural frequency, which can effectively avoid resonance damage of the tower. According to the invention, the mass block is added in the tower drum, so that the mass of the tower drum is increased on the premise of not changing the rigidity of the tower drum, and the natural frequency of the tower drum is further changed.
The technical scheme adopted by the invention is as follows: an offshore wind turbine tower having a variable natural frequency, the offshore wind turbine tower comprising:
the tower drum body is composed of a plurality of tower drum single bodies which are overlapped together along the vertical direction;
a plurality of platforms, each platform of the plurality of platforms formed at a connection of two adjacent tower cells; and
a plurality of masses, at least some of the plurality of masses disposed on the plurality of platforms.
Further, the plurality of platforms are disposed within the tower body and extend horizontally inward from an inner surface of the tower body.
Further, the plurality of platforms are integral with or connected to the tower body.
Further, the tower body has a cylindrical shape and the plurality of platforms have an annular shape.
Further, the at least some masses are disposed on an uppermost platform of the plurality of platforms.
Further, the at least some masses are arranged on the uppermost platform at equal intervals in the circumferential direction.
Further, the mass block has a rectangular parallelepiped shape.
Further, the height of the mass is lower than 3 m.
Further, the height of the mass is below 2 m.
The invention has the beneficial effects that: the offshore wind turbine tower barrel with variable natural frequency has the advantages of simple structure, convenience in construction and low cost. Through adding the mass block in the tower cylinder, the mass of the tower cylinder is increased on the premise of not changing the rigidity of the tower cylinder, so that the natural frequency of the tower cylinder is changed, 1P or 3P load of the running of the fan can be avoided, and the risk of resonance of the fan is reduced. In addition, the invention can be suitable for various types of foundations, such as single-pile foundations, jacket foundations, suction tube foundations and the like, and has wide applicability. The invention can be used as a post-remedial measure and is not considered in the early design.
Drawings
FIG. 1: the invention discloses a cross section schematic diagram of an offshore wind turbine tower with variable natural frequency;
FIG. 2: schematic diagram of the mass block of the invention;
the attached drawings are marked as follows:
1-tower body;
11-tower tube monomer;
2-a platform;
and 3, mass block.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings:
as shown in fig. 1 and 2, an offshore wind turbine tower with variable natural frequency includes a tower body 1, a plurality of platforms 2, and a plurality of mass blocks 3.
The tower body 1 has a cylindrical shape and is formed by a plurality of tower cells 11 stacked together in the vertical direction.
Each platform 2 of the plurality of platforms 2 is formed at the connecting part of two adjacent tower cells 11; the platforms 2 may be integrated with the tower body 1, or may be connected to the tower body 1; the plurality of platforms 2 are disposed inside the tower body 1 and extend horizontally inward from the inner surface of the tower body 1, and have a ring shape.
At least some of the masses 3 of the plurality of masses 3 are arranged on the plurality of platforms 2, a corresponding number of masses 3 being arrangeable according to the mass requirements. For optimal tower natural frequency variation, the at least some masses 3 are arranged on the uppermost platform 2 of the plurality of platforms 2. In addition, the at least some of the masses 3 are arranged on the uppermost platform 2 at equal intervals in the circumferential direction, and the masses 3 are separated by a certain distance and independent of each other. The mass block 3 has a cuboid shape, the mass block 3 cannot be too high, and the height of the mass block 3 is preferably lower than 3m, and most preferably lower than 2 m.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (9)
1. An offshore wind turbine tower having a variable natural frequency, the offshore wind turbine tower comprising:
the tower cylinder body (1), the tower cylinder body (1) is composed of a plurality of tower cylinder single bodies (11) which are overlapped together along the vertical direction;
a plurality of platforms (2), wherein each platform (2) in the plurality of platforms (2) is formed at the connecting part of two adjacent tower single bodies (11); and
a plurality of masses (3), at least some of the masses (3) of the plurality of masses (3) being disposed on the plurality of platforms (2).
2. The offshore wind turbine tower of claim 1, wherein the plurality of platforms (2) are disposed inside the tower body (1) and extend horizontally inwardly from an inner surface of the tower body (1).
3. Offshore wind turbine tower according to claim 2, characterised in that the platforms (2) are integral with the tower body (1) or connected to the tower body (1).
4. Offshore wind turbine tower according to claim 2, characterised in that the tower body (1) has a cylindrical shape and the plurality of platforms (2) has an annular shape.
5. Offshore wind turbine tower according to any of the claims 1 to 4, characterized in that said at least some masses (3) are arranged on the uppermost platform (2) of said plurality of platforms (2).
6. Offshore wind turbine tower according to claim 5, characterised in that said at least some masses (3) are arranged on said uppermost platform (2) at equal intervals in the circumferential direction.
7. Offshore wind turbine tower according to claim 1, characterised in that the mass block (3) has a cuboid shape.
8. Offshore wind turbine tower according to claim 1, characterised in that the height of the mass blocks (3) is below 3 m.
9. Offshore wind turbine tower according to claim 8, characterised in that the height of the mass blocks (3) is below 2 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010317217.0A CN111441915A (en) | 2020-04-21 | 2020-04-21 | Offshore wind turbine tower drum with variable natural frequency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010317217.0A CN111441915A (en) | 2020-04-21 | 2020-04-21 | Offshore wind turbine tower drum with variable natural frequency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111441915A true CN111441915A (en) | 2020-07-24 |
Family
ID=71656059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010317217.0A Pending CN111441915A (en) | 2020-04-21 | 2020-04-21 | Offshore wind turbine tower drum with variable natural frequency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111441915A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410155A (en) * | 2011-12-09 | 2012-04-11 | 三一电气有限责任公司 | Fan and tower barrel thereof |
| CN103452747A (en) * | 2012-05-31 | 2013-12-18 | 北京能高自动化技术股份有限公司 | Fan tower load shedding method based on damping devices |
| CN207406437U (en) * | 2017-10-26 | 2018-05-25 | 北京金风科创风电设备有限公司 | Tower and wind power generating set |
| CN209385285U (en) * | 2018-10-08 | 2019-09-13 | 上海峙狄机械设备有限公司 | The anti-Vortex-excited vibration damper of Wind turbines |
| CN212296721U (en) * | 2020-04-21 | 2021-01-05 | 天津大学 | Offshore wind turbine tower drum with variable natural frequency |
-
2020
- 2020-04-21 CN CN202010317217.0A patent/CN111441915A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410155A (en) * | 2011-12-09 | 2012-04-11 | 三一电气有限责任公司 | Fan and tower barrel thereof |
| CN103452747A (en) * | 2012-05-31 | 2013-12-18 | 北京能高自动化技术股份有限公司 | Fan tower load shedding method based on damping devices |
| CN207406437U (en) * | 2017-10-26 | 2018-05-25 | 北京金风科创风电设备有限公司 | Tower and wind power generating set |
| CN209385285U (en) * | 2018-10-08 | 2019-09-13 | 上海峙狄机械设备有限公司 | The anti-Vortex-excited vibration damper of Wind turbines |
| CN212296721U (en) * | 2020-04-21 | 2021-01-05 | 天津大学 | Offshore wind turbine tower drum with variable natural frequency |
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