WO2022188371A1 - Wind turbine generator and tower door opening local reinforcement structure therefor, and tower and machining method - Google Patents
Wind turbine generator and tower door opening local reinforcement structure therefor, and tower and machining method Download PDFInfo
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- WO2022188371A1 WO2022188371A1 PCT/CN2021/114893 CN2021114893W WO2022188371A1 WO 2022188371 A1 WO2022188371 A1 WO 2022188371A1 CN 2021114893 W CN2021114893 W CN 2021114893W WO 2022188371 A1 WO2022188371 A1 WO 2022188371A1
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- door opening
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- 230000002787 reinforcement Effects 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title abstract description 7
- 238000003754 machining Methods 0.000 title abstract 3
- 238000003466 welding Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 24
- 239000003351 stiffener Substances 0.000 claims description 16
- 238000003672 processing method Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
A wind turbine generator and a tower door opening local reinforcement structure therefor, and a tower and a machining method. The tower door opening local reinforcement structure comprises: n transverse reinforcement ribs (31) and m longitudinal reinforcement ribs (32), which are arranged on an inner wall, around a door opening (2), of a tower barrel, with the door opening (2) as the center; a covering area of the reinforcement structure is 2a1·2b1, wherein a0 is half of the width of the door opening (2), b0 is half of the height of the door opening (2), a1 > a0, and b1 > b0. The machining method for the tower of the wind turbine generator comprises: firstly, welding the reinforcement structure to a steel plate, releasing welding stress, then rolling the tower barrel, releasing deformation stress again after rolling, or welding the reinforcement structure after the tower barrel is rolled and the door opening is formed, and releasing the welding stress after welding of the reinforcement structure is completed. Under the existing technological level, fatigue strength near a door opening can be met, the wall thickness and the mass of the tower can also be reduced, and the construction cost of the wind turbine generator is effectively reduced.
Description
本申请要求于2021年03月08日提交中国专利局、申请号为2021102493107、发明名称为“一种风电机组塔架门洞局部加筋结构、塔架及加工方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application filed on March 08, 2021, with the application number of 2021102493107 and the invention titled "A wind turbine tower portal partially reinforced structure, tower and processing method", The entire contents of which are incorporated herein by reference.
本申请属于风力发电钢制塔架设计技术领域，具体涉及一种风电机组及其塔架门洞局部加筋结构、塔架及加工方法。The application belongs to the technical field of wind power generation steel tower design, and in particular relates to a wind turbine and a partially reinforced structure of a tower door opening, a tower and a processing method.
风力发电机组塔架底部的门洞是运维人员和塔架内电气设备出入风机的主要通道(参考图1)。由于门洞附近会出现局部应力增大的现象。应力集中现象容易导致钢材出现疲劳裂纹，从而使得整个塔架结构失效。The door opening at the bottom of the wind turbine tower is the main passage for operation and maintenance personnel and electrical equipment in the tower to enter and exit the wind turbine (refer to Figure 1). Due to the phenomenon of local stress increase near the door opening. The phenomenon of stress concentration can easily lead to fatigue cracks in the steel, thus making the entire tower structure fail.
因此，风电行业中的通常做法是对门洞所在的塔架底段的主体壁厚进行加厚，以达到疲劳强度的要求。但是，由于风电塔架门洞的高度较高，底段直径较大，因此增加壁厚使得底段的塔架质量急剧提高，增加了成本。举例来说：以6MW机组为例，底段门洞高度5m左右，底段的塔架高度为10m，直径为7m。如表1所示，若底段塔架不开设门洞，则塔架壁厚为20mm，底段塔架质量为24.10t；若底段开设门洞，则塔架壁厚需加厚到50mm，此时底段塔架质量为59.99t，相比底段不开设门洞增加了35.89t。Therefore, the common practice in the wind power industry is to thicken the main wall thickness of the bottom section of the tower where the door opening is located to meet the requirements of fatigue strength. However, since the height of the door opening of the wind power tower is high and the diameter of the bottom section is large, increasing the wall thickness makes the quality of the bottom section of the tower sharply improve and increases the cost. For example: Take a 6MW unit as an example, the height of the door opening in the bottom section is about 5m, the height of the tower in the bottom section is 10m, and the diameter is 7m. As shown in Table 1, if the bottom section of the tower does not have door openings, the tower wall thickness is 20mm, and the bottom section tower mass is 24.10t; if the bottom section has door openings, the tower wall thickness needs to be thickened to 50mm. At the time, the mass of the tower at the bottom section was 59.99t, which was an increase of 35.89t compared with the bottom section without a door opening.
表1Table 1
在设计风电机组门洞所在的底段塔架时，一种方法是尽量优化门洞的形状，减小应力集中系数，以达到减轻塔架质量的目的。由于门洞的形状一般都为标准化设计，若采用新型设计可能会增加工艺成本，导致单位重量的塔架造价升高，最后并不能真正起到降低成本的目的。When designing the bottom section tower where the door opening of the wind turbine is located, one method is to optimize the shape of the door opening as much as possible and reduce the stress concentration factor to achieve the purpose of reducing the quality of the tower. Since the shape of the door opening is generally a standardized design, if a new design is adopted, the process cost may be increased, resulting in an increase in the cost of the tower per unit weight, and finally it cannot really reduce the cost.
发明内容SUMMARY OF THE INVENTION
为解决上述问题，本申请提供一种风电机组塔架门洞局部加筋结构，能够在现有工艺水平下既满足门洞附近疲劳强度，又能够减小塔架壁厚并减轻塔架质量。In order to solve the above problems, the present application provides a local reinforced structure for the door opening of a wind turbine tower, which can not only meet the fatigue strength near the door opening under the existing technological level, but also can reduce the wall thickness of the tower and reduce the quality of the tower.
为达到上述目的，本申请采用的技术方案是：一种风电机组塔架门洞局部加筋结构，在门洞周围的塔筒内壁，以门洞为中心，布置n根横向加强筋和m根纵向加强筋，加筋结构覆盖的面积为2a
1·2b
1，a
0是门洞宽度的一半，b
0是门洞高度的一半，a
1>a
0，b
1>b
0。
In order to achieve the above-mentioned purpose, the technical solution adopted in the present application is: a local reinforced structure for the door opening of a wind turbine tower, in the inner wall of the tower around the door opening, with the door opening as the center, n horizontal reinforcement ribs and m longitudinal reinforcement ribs are arranged. , the area covered by the reinforced structure is 2a 1 ·2b 1 , a 0 is half the width of the door opening, b 0 is half the height of the door opening, a 1 >a 0 , b 1 >b 0 .
横向加强筋和纵向加强筋的横截面为矩形、梯形、半圆形或半椭圆形。The cross-sections of the transverse stiffeners and longitudinal stiffeners are rectangular, trapezoidal, semicircular or semielliptical.
横向加强筋和纵向加强筋的截面为矩形时，长度为L，横向加强筋宽度为t
1，纵向加强筋宽度t
2，横向加强筋和纵向加强筋的宽度为和分布参数满足下列要求：
When the cross section of the transverse and longitudinal reinforcement is rectangular, the length is L, the width of the transverse reinforcement is t 1 , the width of the longitudinal reinforcement is t 2 , the width of the transverse reinforcement and the longitudinal reinforcement and the distribution parameters meet the following requirements:
横向加强筋与风电机组塔架横向角度α小于90°，纵向加强筋与风电机组塔架纵向角度β小于90°，横向加强筋与纵向加强筋之间的夹角不大于90°。The lateral angle α between the transverse stiffener and the wind turbine tower is less than 90°, the longitudinal angle β between the longitudinal stiffener and the wind turbine tower is less than 90°, and the included angle between the lateral stiffener and the longitudinal stiffener is not greater than 90°.
横向加强筋和纵向加强筋与门洞处钢板一体成型。The transverse stiffeners and longitudinal stiffeners are integrally formed with the steel plate at the door opening.
横向加强筋和纵向加强筋与塔筒内壁焊接连接。The transverse stiffeners and the longitudinal stiffeners are welded and connected with the inner wall of the tower.
门洞边缘设置一周加强筋，所述加强筋连接横向加强筋与纵向加强筋，所述加强筋的横截面与横向加强筋横截面相同。A circle of reinforcing ribs is arranged on the edge of the door opening, the reinforcing ribs connect the transverse reinforcing ribs and the longitudinal reinforcing ribs, and the cross-section of the reinforcing ribs is the same as that of the horizontal reinforcing ribs.
一种风电机组塔架，塔架中内壁上设置本申请所述塔架门洞局部加筋 结构。A wind turbine tower, the inner wall of the tower is provided with the partially reinforced structure of the tower door opening of the present application.
本申请所述风电机组塔架的加工方法，首先将所述加筋结构与钢板焊接，并释放焊接应力后，再卷制塔筒，卷制之后再次释放变形应力，In the processing method of the wind turbine tower described in the present application, the reinforced structure is first welded to the steel plate, and the welding stress is released, and then the tower is rolled, and the deformation stress is released again after the rolling,
或在塔筒卷制完成并开设门洞后，焊接加筋结构，加筋结构焊接完成后释放焊接应力。Or after the tower is rolled and the door opening is opened, the reinforced structure is welded, and the welding stress is released after the reinforced structure is welded.
一种风电机组，即风力发电机组，采用本申请所述风电机组塔架。A wind turbine, namely a wind turbine, adopts the wind turbine tower described in the present application.
与现有技术相比，本申请至少具有以下有益效果：Compared with the prior art, the present application at least has the following beneficial effects:
本申请对门洞局部范围内进行加强，以降低应力集中系数，能够在现有工艺水平下既满足门洞附近疲劳强度，又能够减小塔架壁厚并减轻塔架质量的局部加筋结构，有效降低风电机组的整体建设成本。The present application strengthens the local area of the door opening to reduce the stress concentration factor, which can not only satisfy the fatigue strength near the door opening under the existing technological level, but also can reduce the wall thickness of the tower and reduce the local reinforced structure of the quality of the tower. Reduce the overall construction cost of wind turbines.
下面结合附图对本申请的示例性实施例进行详细描述，本申请的以上和其它特点及优点将变得更加清楚，附图中：Exemplary embodiments of the present application will be described in detail below in conjunction with the accompanying drawings, in which the above and other features and advantages of the present application will become more apparent:
图1是风电机组塔架门洞局部加筋结构示意图。Figure 1 is a schematic diagram of the partial reinforcement structure of the door opening of the wind turbine tower.
图2是风电机组塔架门洞布局加筋尺寸图。Figure 2 is a dimension drawing of the reinforcement layout of the door opening of the wind turbine tower.
图3是加强筋尺寸图。Figure 3 is a dimensional drawing of the reinforcing rib.
1-塔筒，2-门洞，3-加强筋，31-横向加强筋，32-纵向加强筋。1- Tower tube, 2- Door opening, 3- Reinforcing rib, 31- Transverse reinforcing rib, 32- Longitudinal reinforcing rib.
下面结合附图和具体实施方式对本申请进行详细说明。The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.
一种风力发电机组(即风电机组)的塔架门洞局部加筋结构，参考图1和图2，所述风力发电机组的塔架的塔筒1上开设门洞2，门洞2周围的塔筒1内壁上设置加强筋3，加强筋3包括横向加强筋31和纵向加强筋32。A local reinforced structure of a tower door opening of a wind turbine (ie wind turbine), with reference to Figure 1 and Figure 2, a door opening 2 is provided on the tower 1 of the tower of the wind turbine, and the tower 1 around the door opening 2 A reinforcing rib 3 is arranged on the inner wall, and the reinforcing rib 3 includes a transverse reinforcing rib 31 and a longitudinal reinforcing rib 32 .
参考图2，布置加强筋的范围为：在塔筒内壁距离门洞中心O的x和-x方向的a
1的范围内均匀布置m根纵向加强筋32，在塔筒内壁距离门洞中心O的y和-y方向的b
1的范围内均匀布置n根横向加强筋31；所述加强筋3的横截面尺寸为：长度为L，高度为h，宽度为t；当加强筋3为横向加强筋31时宽度为t
1，当为纵向加强筋32时宽度为t
2。加强筋3的宽 度和分布参数满足下列要求：
Referring to Figure 2, the range of arranging the reinforcing ribs is: uniformly arrange m longitudinal reinforcing ribs 32 within the range of a 1 in the x and -x directions of the inner wall of the tower from the center O of the door opening, and the inner wall of the tower from the center O of the door opening y. And n transverse reinforcement ribs 31 are evenly arranged within the range of b 1 in the -y direction; the cross-sectional dimensions of the reinforcement ribs 3 are: the length is L, the height is h, and the width is t; when the reinforcement ribs 3 are transverse reinforcement ribs The width is t 1 when it is 31 , and the width is t 2 when it is the longitudinal reinforcing rib 32 . The width and distribution parameters of the reinforcing ribs 3 meet the following requirements:
其中，t
1表示横向加强筋31的宽度，b
2表示横向加强筋31的间距，t
2表示纵向加强筋32的宽度，a
2表示纵向加强筋32的间距，a
0表示门洞宽度，b
0表示门洞高度。
Among them, t 1 represents the width of the transverse reinforcement rib 31, b 2 represents the spacing of the transverse reinforcement rib 31, t 2 represents the width of the longitudinal reinforcement rib 32, a 2 represents the spacing of the longitudinal reinforcement rib 32, a 0 represents the width of the door opening, and b 0 Indicates the height of the door opening.
参考图2，采用本申请的风电机组塔架门洞局部加筋结构时，横向加强筋31与x轴的角度α不限于0°，纵向加强筋32与-y轴的角度β不限于0°，横向加强筋31与纵向加强筋32之间的夹角不限于90°。Referring to FIG. 2, when the wind turbine tower doorway local reinforcement structure of the present application is adopted, the angle α between the transverse reinforcement rib 31 and the x-axis is not limited to 0°, and the angle β between the longitudinal reinforcement rib 32 and the -y axis is not limited to 0°, The included angle between the transverse reinforcement rib 31 and the longitudinal reinforcement rib 32 is not limited to 90°.
采用本申请的风电机组塔架门洞局部筋结构时，对于特定问题可通过以下优化列式求得最优的加强筋结构设计：When using the local rib structure of the wind turbine tower door opening of the present application, the optimal rib structure design can be obtained through the following optimization formula for specific problems:
find:a
1,b
1,a
2,b
2,t
1,t
2,h,m,n,α,β
find:a 1 ,b 1 ,a 2 ,b 2 ,t 1 ,t 2 ,h,m,n,α,β
m in im ize:SCFm in imize: SCF
subject to:m·t
2+(m-1)·a
2＝2a
1
subject to: m·t 2 +(m-1)·a 2 =2a 1
n·t
1+(n-1)·b
2＝2b
1
n·t 1 +(n-1)·b 2 =2b 1
a
1＞a
0
a 1 >a 0
b
1＞b
0
b 1 >b 0
L≤2b
1≤2a
1
L≤2b 1 ≤2a 1
α≥0°α≥0°
β≥0°β≥0°
其中，SCF表示应力集中系数。where SCF is the stress concentration factor.
本申请提出一种能够在现有工艺水平下既满足门洞附近疲劳强度，又能够减小塔架壁厚并减轻塔架质量的局部加筋结构，所述风机塔架局部加筋结构的应用于塔底直径7m塔筒的实施例中，门洞高度2b
0＝4.0m，门洞宽度2a
0＝1.8m，2a
1＝3.8m，2b
0＝6.0m，t
1＝t
2＝h＝0.03m，m＝n＝10根，α＝β＝0°。
The present application proposes a locally reinforced structure that can not only satisfy the fatigue strength near the door opening, but also reduce the wall thickness of the tower and reduce the quality of the tower under the existing technological level. The application of the locally reinforced structure of the fan tower In the embodiment of the tower with a diameter of 7m at the bottom of the tower, the height of the door opening is 2b 0 =4.0m, the width of the door opening is 2a 0 =1.8m, 2a 1 =3.8m, 2b 0 =6.0m, t 1 =t 2 =h=0.03m, m=n=10 roots, α=β=0°.
表2在没有显著增加工艺复杂程度的前提下，既满足门洞附近疲劳强度，又能够减小塔架壁厚并降低塔架质量。Table 2 can not only meet the fatigue strength near the door opening, but also reduce the wall thickness of the tower and reduce the quality of the tower without significantly increasing the complexity of the process.
表2Table 2
基于表2中示出的计算结果，每台风机底段塔架可以减重17.91t，降幅29.9％。按照一个风场设置有50台风力发电机，每吨钢板报价1.4万元来估算，可以节约1253.7万元。即，在不考虑加筋材料成本的基础上，根据本申请的采用塔门洞局部加筋结构可使制造成本降低约1253.7万元。Based on the calculation results shown in Table 2, the weight of the bottom tower of each fan can be reduced by 17.91t, a decrease of 29.9%. According to a wind farm with 50 wind turbines, the price of 14,000 yuan per ton of steel plate can be estimated, which can save 12.537 million yuan. That is, on the basis of disregarding the cost of reinforcement materials, the use of the partial reinforcement structure of the pylon hole according to the present application can reduce the manufacturing cost by about 12.537 million yuan.
虽然已经参照本申请的示例性实施例具体示出和描述了本申请，但是本领域普通技术人员应该理解，在不脱离由权利要求限定范围的情况下，可以对其进行形式和细节的各种改变。Although the present application has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and detail may be made therein without departing from the scope defined by the claims. Change.
Claims (10)
- 一种风电机组塔架门洞局部加筋结构，其特征在于，在门洞(2)周围的塔筒内壁，以门洞为中心，布置n根横向加强筋(31)和m根纵向加强筋(32)，加筋结构覆盖的面积为2a 1·2b 1，a 0是门洞宽度的一半，b 0是门洞高度的一半，a 1>a 0，b 1>b 0。 A partially reinforced structure for a door opening of a wind turbine tower, characterized in that, on the inner wall of the tower around the door opening (2), with the door opening as the center, n transverse reinforcing ribs (31) and m longitudinal reinforcing ribs (32) are arranged , the area covered by the reinforced structure is 2a 1 ·2b 1 , a 0 is half the width of the door opening, b 0 is half the height of the door opening, a 1 >a 0 , b 1 >b 0 .
- 根据权利要求1所述的风电机组塔架门洞局部加筋结构，其特征在于，横向加强筋(31)和纵向加强筋(32)的横截面为矩形、梯形、半圆形或半椭圆形。The partially reinforced structure for the door opening of a wind turbine tower according to claim 1, characterized in that the cross-sections of the transverse reinforcement rib (31) and the longitudinal reinforcement rib (32) are rectangular, trapezoidal, semicircular or semielliptical.
- 根据权利要求2所述的风电机组塔架门洞局部加筋结构，其特征在于，横向加强筋(31)和纵向加强筋(32)的截面为矩形时，长度为L，横向加强筋(31)宽度为t 1，纵向加强筋(32)宽度为t 2，横向加强筋(31)和纵向加强筋(32)的宽度和分布参数满足下列要求： The partially reinforced structure for the door opening of a wind turbine tower according to claim 2, characterized in that, when the cross-sections of the transverse reinforcement rib (31) and the longitudinal reinforcement rib (32) are rectangular, the length is L, and the transverse reinforcement rib (31) The width is t 1 , the width of the longitudinal stiffener (32) is t 2 , and the width and distribution parameters of the transverse stiffener (31) and the longitudinal stiffener (32) meet the following requirements:
- 根据权利要求1所述的风电机组塔架门洞局部加筋结构，其特征在于，横向加强筋(31)与风电机组塔架横向角度α小于90°，纵向加强筋(32)与风电机组塔架纵向角度β小于90°，横向加强筋(31)与纵向加强筋(32)之间的夹角不大于90°。The partially reinforced structure of the door opening of the wind turbine tower according to claim 1, characterized in that, the transverse angle α between the transverse reinforcement ribs (31) and the wind turbine tower is less than 90°, and the longitudinal reinforcement ribs (32) and the wind turbine tower are smaller than 90°. The longitudinal angle β is less than 90°, and the included angle between the transverse stiffener (31) and the longitudinal stiffener (32) is not greater than 90°.
- 根据权利要求1所述的风电机组塔架门洞局部加筋结构，其特征在于，横向加强筋(31)和纵向加强筋(32)与门洞处钢板一体成型。The partial reinforcement structure of the door opening of the wind turbine tower according to claim 1, characterized in that the transverse reinforcement ribs (31) and the longitudinal reinforcement ribs (32) are integrally formed with the steel plate at the door opening.
- 根据权利要求1所述的风电机组塔架门洞局部加筋结构，其特征在于，横向加强筋(31)和纵向加强筋(32)与塔筒内壁焊接连接。The partially reinforced structure for the door opening of a wind turbine tower according to claim 1, characterized in that the transverse reinforcement ribs (31) and the longitudinal reinforcement ribs (32) are welded and connected to the inner wall of the tower.
- 根据权利要求1所述的风电机组塔架门洞局部加筋结构，其特征在于，门洞边缘设置一周加强筋，所述加强筋连接横向加强筋(31)与纵向加强筋(32)，所述加强筋的横截面与横向加强筋(31)横截面相同。The partially reinforced structure of the door opening of a wind turbine tower according to claim 1, characterized in that the edge of the door opening is provided with a circle of reinforcing ribs, and the reinforcing ribs connect the transverse reinforcing ribs (31) and the longitudinal reinforcing ribs (32). The cross section of the rib is the same as the cross section of the transverse stiffener (31).
- 一种风电机组塔架，其特征在于，塔架中内壁上设置权利要求1～7任一项所述塔架门洞局部加筋结构。A wind turbine tower, characterized in that the inner wall of the tower is provided with the partial reinforcement structure of the tower door opening according to any one of claims 1 to 7.
- 权利要求8所述风电机组塔架的加工方法，其特征在于，首先将所述加筋结构与钢板焊接，并释放焊接应力后，再卷制塔筒，卷制之后再次释放变形应力，The processing method of the wind turbine tower according to claim 8 is characterized in that, firstly, the reinforced structure is welded with the steel plate, and after the welding stress is released, the tower is rolled, and the deformation stress is released again after the rolling,或在塔筒卷制完成并开设门洞后，焊接加筋结构，加筋结构焊接完成后释放焊接应力。Or after the tower is rolled and the door opening is opened, the reinforced structure is welded, and the welding stress is released after the reinforced structure is welded.
- 一种风电机组，其特征在于，采用权利要求8所述风电机组塔架。A wind turbine, characterized in that the tower of the wind turbine according to claim 8 is used.
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| CN202110249310.7A CN112761892A (en) | 2021-03-08 | 2021-03-08 | Local reinforcement structure for wind turbine generator tower door opening, tower and processing method |
| CN202110249310.7 | 2021-03-08 |
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| WO2022188371A1 true WO2022188371A1 (en) | 2022-09-15 |
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| CN112761892A (en) * | 2021-03-08 | 2021-05-07 | 中国华能集团清洁能源技术研究院有限公司 | Local reinforcement structure for wind turbine generator tower door opening, tower and processing method |
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