CN112412707A - Assembled wind turbine generator system circle cross section concrete bearing structure - Google Patents
Assembled wind turbine generator system circle cross section concrete bearing structure Download PDFInfo
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- CN112412707A CN112412707A CN202011386860.5A CN202011386860A CN112412707A CN 112412707 A CN112412707 A CN 112412707A CN 202011386860 A CN202011386860 A CN 202011386860A CN 112412707 A CN112412707 A CN 112412707A
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 50
- 239000010959 steel Substances 0.000 claims abstract description 50
- 238000004873 anchoring Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 4
- 238000009417 prefabrication Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 10
- 238000005452 bending Methods 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011179 visual inspection Methods 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
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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
- Y02E10/728—Onshore 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 a circular section concrete supporting structure of an assembled wind turbine generator, which comprises at least one structural unit, wherein the structural unit comprises a concrete tower section, longitudinal steel bars in the tower section, an upper flange plate, a lower flange plate, upper prestressed steel strands, lower prestressed steel strands and high-strength bolts, the longitudinal steel bars in the tower section and the upper and lower flange plates are integrally cast to form an integral frame, the concrete is poured between the upper and lower flange plates, the longitudinal steel bars in the tower section are wrapped in the integral frame, the upper and lower prestressed steel strands are connected with a plurality of structural units in an annular mode through pretensioning, and the upper and lower flange plates are connected with the plurality of structural units in a vertical mode through the high-strength bolts to form a conical integral body. The concrete tower tube assembling method disclosed by the invention can meet the requirements of sectional prefabrication in factories and integral assembly on site, and simultaneously effectively improves the integrity and installation of the concrete tower tube.
Description
Technical Field
The invention belongs to the field of civil engineering, and relates to a circular section concrete supporting structure of an assembled wind turbine generator.
Background
China has become the largest carbon dioxide emitting country in the world since 2007, and the growing energy demand is in conflict with the severe energy-saving and emission-reducing task. China has abundant land wind energy resources, and the development of wind power energy becomes an important component of the national energy structure transformation strategy. In order to obtain stable generating capacity, the wind turbine generator is erected in the air through a supporting structure. In recent years, the single-machine capacity, the hub height and the wind wheel diameter of the wind power structure are gradually improved, and the traditional conical steel tower supporting structure is limited in bearing capacity and is more and more difficult to meet the trend of large-scale development of the wind power structure. First, the increase in wall thickness of the circular steel tube has limited contribution to the lateral stiffness of the member, and the increase in diametral length is limited by processing costs and shipping conditions. Secondly, the local buckling of the section of the circular steel tube can cause the bending resistance of the section to be rapidly reduced, and the bending resistance is more serious along with the increase of the diameter-thickness ratio.
The manufacturing cost of each cubic of concrete is less than one tenth of that of each ton of steel, the introduction of the concrete reduces the steel consumption of the supporting structure, and the application limitation of the wind power structure caused by the problems of cost and the like is favorably broken through. In order to reduce the transportation size and the hoisting weight, the concrete tower drum generally needs to be prefabricated in a factory in a segmented mode and integrally assembled on site, but the horizontal joint and the vertical joint which are generated by the method not only damage the structural integrity, but also influence the construction quality and the construction progress. For example, wet connection of filling joints by grouting material trowelling is often unable to be checked by visual inspection because of the construction quality inside the sealing strip, and construction is also interrupted because the strength is difficult to improve during winter construction. According to the invention, the longitudinal steel bars of the tower sections and the connecting flange plate are integrally cast to form a frame, and then the frame is stretched into a whole by the annular prestressed tendons, so that the ductility and stability of the tower barrel are improved, the installation efficiency of each tower section is improved, and the effective compatibility of high integrity and rapid construction is realized. The excessively high installation accuracy requirement and the adverse effect of winter construction are avoided.
Disclosure of Invention
The technical problem is as follows: the invention provides a circular section concrete supporting structure of an assembled wind turbine generator, which can effectively enhance the integrity and improve the construction efficiency.
The technical scheme is as follows: the utility model provides an assembled wind turbine generator system circle cross section concrete bearing structure, its characterized in that, this structure includes at least one constitutional unit, constitutional unit includes a section concrete tower section, an upper flange dish, a lower flange dish, many longitudinal reinforcement, a plurality of high strength bolt, the prestressing force stranded wire that is located tower section upper portion that links to each other upper flange dish and lower flange dish, the prestressing force stranded wire that is located tower section lower part, upper flange dish and lower flange dish and longitudinal reinforcement casting as an organic whole, concrete tower section is pour between upper flange dish and lower flange dish, wraps up tower section longitudinal reinforcement in, upper flange dish and lower flange dish reserve and have double evenly distributed's bolt hole, upper prestressing force stranded wire and lower prestressing force stranded wire add certain initial prestressing force in advance.
Furthermore, the assembled wind turbine generator circular section concrete supporting structure is characterized in that an upper prestressed duct and a lower prestressed duct which are communicated along the cross section are reserved at the top and the bottom of the concrete tower section and are respectively used for penetrating through the upper prestressed steel strand and the lower prestressed steel strand. And an upper groove and a lower groove are reserved in the middle parts of the upper prestressed duct and the lower prestressed duct and are respectively used for anchoring the upper prestressed steel strand and the lower prestressed steel strand.
Further, the assembled wind turbine generator circular section concrete supporting structure is characterized by comprising a plurality of structural units, wherein the structural units are formed by connecting every two adjacent flange plates in the vertical direction through high-strength bolts.
Furthermore, the assembled wind turbine generator circular section concrete supporting structure is characterized by comprising a plurality of structural units which are connected in sequence through prestressed steel strands in the horizontal direction to form a circular section.
Furthermore, the assembled wind turbine generator circular section concrete supporting structure is characterized in that a plurality of structural units are connected with one another to form an integral tower cylinder with a circular section gradually reduced from bottom to top.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) the invention adopts a full-dry type connection mode of the flange plate high-strength bolt and the prestressed steel strand hoop, thereby greatly improving the field assembly efficiency. The wet connection of the grouting material needs to wait for the next section of hoisting after the wet connection reaches a certain strength, the field installation efficiency is low, and the construction is also interrupted because the strength is difficult to improve during the construction in winter. The invention realizes the connection of the transverse joint and the vertical joint through the flange plate bolt and the annular prestress steel strand respectively, and the assembly efficiency is greatly improved.
(2) The invention adopts the scheme that the flange plate and the longitudinal steel bar are integrally cast, thereby reducing the requirement on processing precision and avoiding the link of adjusting levelness on site. The aspect ratio of the tower is very different, and the dry connection is often difficult to construct due to poor levelness of the prefabricated parts, and a large amount of time is spent on grinding on site to adjust the levelness. According to the invention, the longitudinal steel bars and the flange plates are integrally cast, and the distance and the levelness of the upper flange plate and the lower flange plate are fixed by the longitudinal steel bars, so that the precision of the prefabricated part is higher.
(3) The invention can effectively enhance the survival ability of the tower drum structure under extreme disasters. The section bending moment generated by the tower barrel due to the large height is also very large, and when no steel bars are connected at the joints of the adjacent subsections, the ductility and the energy consumption capability of the joints are low under extreme disasters such as earthquake and typhoon, irreversible brittle damage is easy to occur, the repair is difficult, and the collapse of the tower barrel is easy to cause. The invention not only can enable the concrete in the tower section to be in an annular compression state, but also can enable the steel bars in the tower section to participate in energy consumption, thereby greatly improving the anti-overturning capability of the tower drum supporting structure under extreme disasters.
Drawings
FIG. 1 is a three-dimensional schematic of the present invention (cast concrete);
FIG. 2 is a front view of the present invention (cast concrete);
FIG. 3 is a three-dimensional schematic of the present invention (no concrete poured);
FIG. 4 is a front view of the present invention (no concrete poured);
FIG. 5 is a front view of the connection with high tension bolts;
FIG. 6 is a front view of the upper and lower flanges;
FIG. 7 is a horizontal sectional assembly view of 4 structural units;
FIG. 8 is an overall assembly view of a tower constructed from 12 structural units;
the figure shows that: the concrete tower comprises a concrete tower section 1, an upper prestressed duct 11, a lower prestressed duct 12, an upper groove 13, a lower groove 14, an upper flange plate 2, a lower flange plate 3, tower section longitudinal steel bars 4, high-strength bolts 5, upper prestressed steel strands 6, lower prestressed steel strands 7 and bolt holes 8.
Detailed Description
As shown in fig. 1 to 6, according to the fabricated wind turbine generator circular section concrete supporting structure, when the cross section of the tower cylinder is large, the tower cylinder can be divided into a plurality of structural units along the circumferential direction for prefabrication, and when the height of the tower cylinder is large, the tower cylinder can be divided into a plurality of structural units along the longitudinal direction for prefabrication. The structural unit comprises a concrete tower section 1, an upper flange plate 2 and a lower flange plate 3 which are the same in structure, a plurality of longitudinal steel bars 4 which connect the upper flange plate 2 and the lower flange plate 3, a plurality of high-strength bolts 5, prestressed steel strands 6 which are positioned on the upper portion of the tower section, and prestressed steel strands 7 which are positioned on the lower portion of the tower section, wherein the upper flange plate 2, the lower flange plate 3 and the longitudinal steel bars 4 are integrally cast in a factory, the concrete tower section 1 is poured between the upper flange plate 2 and the lower flange plate 3, the tower section longitudinal steel bars 4 are wrapped in the concrete tower section, double rows of uniformly distributed bolt holes 8 are reserved in the upper flange plate 2 and the lower flange plate 3, and the upper prestressed steel strands 6 and the lower prestressed steel strands 7 pre-stress a certain initial degree.
A through upper prestressed duct 11 is reserved at the top of the concrete tower section 1, a through lower prestressed duct 12 is reserved at the bottom of the concrete tower section, and an upper groove 13 and a lower groove 14 are respectively arranged in the middle positions of the upper duct and the lower duct. The upper prestressed steel strand 6 and the upper prestressed steel strand 7 are respectively placed in the upper prestressed channel 11 and the lower prestressed channel 12, and the upper groove and the lower groove are used for anchoring the prestressed steel strands and are conveniently led out to penetrate through the whole cross section.
After the structural units are fabricated in the above manner, the structural units may be connected together as shown in fig. 7-8 to form an integral tower. If a plurality of constitutional unit can't be closed because of the hoop of manufacturing error, can suitably scribble epoxy and make level, then stretch-draw prestressing force steel strand wires along the hoop for each hoop constitutional unit connection becomes one section whole. And then connecting a plurality of structural units spliced into a ring vertically, placing the high-strength bolts into the reserved bolt holes on the flange plates, and applying pretightening force to connect the adjacent flange plates to form the integral tower.
Claims (5)
1. The assembled wind turbine generator circular section concrete supporting structure is characterized by comprising at least one structural unit, wherein the structural unit comprises a section of concrete tower section (1), an upper flange plate (2), a lower flange plate (3), a plurality of longitudinal steel bars (4) for connecting the upper flange plate (2) with the lower flange plate (3), a plurality of high-strength bolts (5), prestressed steel strands (6) positioned at the upper part of the tower section and prestressed steel strands (7) positioned at the lower part of the tower section, the upper flange plate (2), the lower flange plate (3) and the longitudinal steel bars (4) are integrally cast, the concrete tower section (1) is poured between the upper flange plate (2) and the lower flange plate (3) and wraps the longitudinal steel bars (4) of the tower section, and double rows of bolt holes (8) which are uniformly distributed are reserved in the upper flange plate (2) and the lower flange plate (3), the upper prestressed steel strand (6) and the lower prestressed steel strand (7) are prestressed in advance to a certain initial prestress.
2. The assembled wind turbine circular section concrete supporting structure of claim 1, wherein the concrete tower section (1) is provided with an upper prestressed duct (11) and a lower prestressed duct (12) which are perforated along the cross section and are reserved at the top and the bottom of the concrete tower section, and the upper prestressed duct and the lower prestressed duct are respectively perforated through the upper prestressed steel strand (6) and the lower prestressed steel strand (7). And an upper groove (13) and a lower groove (14) are reserved in the middle of the upper prestressed channel (11) and the lower prestressed channel (12) and are respectively used for anchoring the upper prestressed steel strand (6) and the lower prestressed steel strand (7).
3. The fabricated wind turbine circular-section concrete supporting structure of claims 1 and 2, characterized by comprising a plurality of structural units which are connected in sequence in the horizontal direction through prestressed steel strands to form a circular section.
4. The fabricated wind turbine circular section concrete support structure of claims 1, 2 and 3, characterized in that the structure comprises a plurality of structural units which are connected in pairs in the vertical direction through high-strength bolts in a flange plate.
5. The assembled wind turbine generator circular-section concrete supporting structure as claimed in claims 1, 2, 3 and 4, wherein a plurality of structural units are connected with each other to form an integral tower with a circular section gradually reduced from bottom to top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011386860.5A CN112412707A (en) | 2020-12-01 | 2020-12-01 | Assembled wind turbine generator system circle cross section concrete bearing structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011386860.5A CN112412707A (en) | 2020-12-01 | 2020-12-01 | Assembled wind turbine generator system circle cross section concrete bearing structure |
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| Publication Number | Publication Date |
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| CN112412707A true CN112412707A (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011386860.5A Pending CN112412707A (en) | 2020-12-01 | 2020-12-01 | Assembled wind turbine generator system circle cross section concrete bearing structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922788A (en) * | 2021-03-09 | 2021-06-08 | 中国电建集团西北勘测设计研究院有限公司 | Fan tower section of thick bamboo precast concrete component and fan tower section of thick bamboo |
| CN114033625A (en) * | 2021-11-30 | 2022-02-11 | 华电重工机械有限公司 | Wind power tower cylinder foundation shell ring structure |
| CN114294173A (en) * | 2021-12-20 | 2022-04-08 | 山东中车风电有限公司 | High-power generator set tower and construction method thereof |
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| CN103821677A (en) * | 2014-03-20 | 2014-05-28 | 哈尔滨工业大学（威海） | Assembly type prestress reactive powder concrete wind power tower |
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| CN106949017A (en) * | 2017-05-05 | 2017-07-14 | 同济大学建筑设计研究院(集团)有限公司 | A kind of prefabricated mixing pylon of Wind turbines bottom burst |
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| CN214741846U (en) * | 2020-12-01 | 2021-11-16 | 重庆大学 | Assembled wind turbine generator system circle cross section concrete bearing structure |
-
2020
- 2020-12-01 CN CN202011386860.5A patent/CN112412707A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103821677A (en) * | 2014-03-20 | 2014-05-28 | 哈尔滨工业大学（威海） | Assembly type prestress reactive powder concrete wind power tower |
| CN103994035A (en) * | 2014-06-13 | 2014-08-20 | 湖南大学 | Connection transition device of prestress concrete tower section and steel tower section of combined wind power tower |
| CN106949017A (en) * | 2017-05-05 | 2017-07-14 | 同济大学建筑设计研究院(集团)有限公司 | A kind of prefabricated mixing pylon of Wind turbines bottom burst |
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| CN214741846U (en) * | 2020-12-01 | 2021-11-16 | 重庆大学 | Assembled wind turbine generator system circle cross section concrete bearing structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922788A (en) * | 2021-03-09 | 2021-06-08 | 中国电建集团西北勘测设计研究院有限公司 | Fan tower section of thick bamboo precast concrete component and fan tower section of thick bamboo |
| CN114033625A (en) * | 2021-11-30 | 2022-02-11 | 华电重工机械有限公司 | Wind power tower cylinder foundation shell ring structure |
| CN114294173A (en) * | 2021-12-20 | 2022-04-08 | 山东中车风电有限公司 | High-power generator set tower and construction method thereof |
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