WO2022143246A1 - Wind turbine, round tower door opening structure of wind turbine, and manufacturing method therefor - Google Patents
Wind turbine, round tower door opening structure of wind turbine, and manufacturing method therefor Download PDFInfo
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- WO2022143246A1 WO2022143246A1 PCT/CN2021/139555 CN2021139555W WO2022143246A1 WO 2022143246 A1 WO2022143246 A1 WO 2022143246A1 CN 2021139555 W CN2021139555 W CN 2021139555W WO 2022143246 A1 WO2022143246 A1 WO 2022143246A1
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 181
- 239000010959 steel Substances 0.000 claims abstract description 181
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000003466 welding Methods 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 10
- 238000003754 machining Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 238000009966 trimming 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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- 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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
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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
Definitions
- the invention belongs to the technical field of wind power generation steel tower design, and particularly relates to a wind turbine, a wind turbine circular tower door structure and a manufacturing method.
- 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).
- a local stress increase occurs near the tower door opening.
- the phenomenon of stress concentration can easily lead to fatigue cracks in the steel, thus making the entire tower structure fail.
- 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.
- 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.
- the height of the door opening in the bottom section is about 5m
- the height of the tower in the bottom section is 10m
- the diameter is 7m.
- 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 that 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 openings.
- 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. Therefore, another method is to only use the wall thickness value of the door opening near the door opening and the place where the stress concentration phenomenon is more obvious; for the part far from the door opening and the stress concentration phenomenon is not obvious, the wall thickness value of the door opening is still used.
- the present invention provides a wind turbine, a doorway structure and a manufacturing method of a circular tower of the wind turbine, which can not only satisfy the fatigue strength near the doorway, but also reduce the wall thickness of the tower and the quality of the tower. .
- the technical scheme adopted in the present invention is: a door structure of a circular tower of a wind turbine, the bottom section of the tower includes a part of the arc section steel plate: a first arc section steel plate, two second arc section sections Steel plates, two third arc-segment steel plates and a fourth arc-segment steel plate;
- the door opening is opened on the first arc-segment steel plate, the two second arc-segment plates are symmetrical about the vertical centerline of the door opening, and the two third arc-segment plates are
- the circular arc section steel plate is symmetrical about the vertical center line of the door opening, and the two adjacent circular arc section steel plates are welded.
- the thickness of the steel plate in the three arc segments, the thickness of the steel plate in the third arc segment is greater than that in the fourth arc segment.
- the thicker steel plate shall be trimmed with a slope of not more than 1:4 along the welding seam.
- the thicknesses of the first circular arc section steel plate, the second circular arc section steel plate and the third circular arc section steel plate gradually change along their respective lateral directions.
- the widths of the first circular arc section steel plate, the second circular arc section steel plate and the third circular arc section steel plate decrease in turn.
- the central angles corresponding to the first circular arc section steel plate, the second circular arc section steel plate and the third circular arc section steel plate are respectively 2 ⁇ 1 , ⁇ 2 and ⁇ 3 ; ⁇ 1 is 30° ⁇ 60°, and ⁇ 2 is 10° ⁇ 30°, ⁇ 3 is 10° ⁇ 30°; the thicknesses of the first circular arc section steel plate, the second circular arc section steel plate, the third circular arc section steel plate and the fourth arc section steel plate are t 1 , t 2 , and t 3 respectively and t 4 ; t 1 is 30mm-70mm, t 2 is 20mm-60mm, t 3 is 15mm-50mm, and t 4 is 10mm-30mm.
- the width of the door opening is 900mm-1400mm, and the height is 2.6m-3.2m.
- the central angle corresponding to the steel plate of the fourth arc segment is 180°.
- the door opening is in the shape of a racetrack.
- the first circular arc section steel plate, the second circular arc section steel plate, the third circular arc section steel plate and the fourth arc section steel plate are welded, the first circular arc section steel plate, the second circular arc section steel plate, and the fourth arc section steel plate are welded.
- One arc section steel plate and two second arc section steel plates then weld the second arc section steel plate and the third arc section steel plate, and finally weld the fourth arc section steel plate and the third arc section steel plate; and the welding is completed heat treatment immediately after.
- a wind turbine generator set, the structure of the tower door opening adopts the circular tower door opening structure of the wind turbine generator set of the present invention.
- the present invention has at least the following beneficial effects: welding two adjacent arc-segment steel plates, the thickness of the first arc-segment steel plate is greater than that of the second arc-segment steel plate, and the thickness of the second arc-segment steel plate is greater than that of the second arc-segment steel plate.
- the thickness of the steel plate in the third arc section is larger than that of the steel plate in the third arc section, and the thickness of the steel plate in the third arc section is larger than that in the fourth arc section.
- the strength of the bottom section of the tower meets the design requirements.
- the first arc section steel plate, the second arc section steel plate, the third arc section steel plate and the fourth arc section steel plate are welded in sequence, and heat treatment is performed to achieve stability. Reliable production.
- Figure 1 Structure diagram of the bottom section of the steel tower of a traditional wind turbine
- Figure 2 is a schematic diagram of the stress concentration phenomenon near the tower door opening
- Figure 3 is a structural diagram of the bottom section of the steel tower of the new wind turbine
- Figure 4 is a schematic diagram of the transition of steel plate grooves of different thicknesses of the steel tower of the new wind turbine.
- the bottom tower 10 includes six parts of arc-segment steel plates: a first arc-segment steel plate 11 , two second arc-segment steel plates 12 , Two third arc-segment steel plates 13 and a fourth arc-segment steel plate 14; the door opening is opened on the first arc-segment steel plate 11, and the two second arc-segment steel plates 12 are symmetrical about the vertical centerline of the door opening.
- the third circular arc section steel plate 13 is symmetrical about the vertical center line of the doorway, and two adjacent circular arc section steel plates are welded.
- the thickness of the first circular arc section steel plate 11 is greater than that of the second circular arc section steel plate 12,
- the thickness of the steel plate 12 is greater than the thickness of the third arc segment steel plate 13, and the thickness of the third arc segment steel plate 13 is greater than that of the fourth arc segment steel plate 14;
- the shape of the door opening is a racetrack shape;
- the central angle corresponding to the fourth arc segment steel plate 14 is 180°.
- the thicker steel plate shall be trimmed with a slope of not more than 1:4 along the welding seam.
- the thicknesses of the first circular arc segment steel plate 11 , the second circular arc segment steel plate 12 and the third circular arc segment steel plate 13 gradually change along their respective lateral directions.
- the widths of the first circular arc section steel plate 11 , the second circular arc section steel plate 12 and the third circular arc section steel plate 13 decrease sequentially.
- the central angles corresponding to the first circular arc section steel plate 11, the second circular arc section steel plate 12 and the third circular arc section steel plate 13 are respectively 2 ⁇ 1 , ⁇ 2 and ⁇ 3 ; ⁇ 1 is 30° to 60°, and ⁇ 2 is 10° ⁇ 30°, ⁇ 3 is 10° ⁇ 30°; the thicknesses of the first circular arc section steel plate 11, the second circular arc section steel plate 12, the third circular arc section steel plate 13 and the fourth arc section steel plate 14 are respectively t 1 , t 2 , t 3 and t 4 ; t 1 is 30mm-70mm, t 2 is 20mm-60mm, t 3 is 15mm-50mm, and t 4 is 10mm-30mm.
- the width of the door opening is 900mm-1400mm, and the height is 2.6m-3.2m.
- the first arc section steel plate 11 , the second arc section steel plate 12 , the third arc section steel plate 13 and the fourth arc section steel plate 14 are welded during welding. , first weld the first arc section steel plate 11 and the two second arc section steel plates 12; then weld the second arc section steel plate 12 and the third arc section steel plate 13, and finally weld the fourth arc section steel plate 14 with the third arc section steel plate 14
- the arc section steel plate 13 is welded; and heat treatment is performed immediately after the welding is completed.
- the present invention can also be implemented with a wind turbine, and the structure of the door opening of the wind power generation tower adopts the circular tower door structure of the wind turbine according to the present invention.
- the present invention proposes a structure and a manufacturing method which can satisfy the fatigue strength near the door opening under the existing technological level, and can reduce the wall thickness of the tower and the quality of the tower.
- the structure of the bottom section of the tower, the tower section where the doorway of the offshore wind turbine tower is located includes a variety of steel plates with different thicknesses.
- the tower at the largest point towards the door opening is symmetrical with its center plane, and is divided into several arc segments, each arc segment corresponds to a central angle. Refer to Figure 3 for details.
- the variable thickness part of each arc segment meets the following requirements:
- the bottom section tower 10 is divided into 6 parts: the arc section steel plate 14, the first arc section Steel plate 11, two third arc-segment steel plates 13 that are symmetrical about the centerline of the doorway, and two second arc-segment steel plates 12 that are symmetrical about the centerline of the doorway; the first arc-segment steel plate 11, where t 1 represents the The thickness of the first arc segment steel plate 11 of the variable thickness portion; t 2 represents the thickness of the second arc segment steel plate 12 of the variable thickness portion; t 3 represents the thickness of the third arc segment steel plate 13 of the variable thickness portion thickness; t 4 represents the thickness of the fourth circular arc segment steel plate 14 of the variable thickness portion; 2 ⁇ 1 represents the central angle angle corresponding to the circular arc segment steel plate 11 ; ⁇ 2 represents the circle center corresponding to the circular arc segment steel plate 12 ;
- the tower section where the door opening of the offshore wind turbine tower is located includes a variety of steel plates with different thicknesses, and the variable thickness part meets the following requirements:
- t 1 , t 2 , t 3 , t 4 and ⁇ 1 , ⁇ 2 , ⁇ 3 are respectively:
- the wall thickness of the tower can be reduced and the quality of the tower can be reduced.
- Table 2 shows that the design result of opening the door opening given by the exemplary embodiment of the present invention is compared with the design result given by the traditional opening opening design.
- the traditional design method for opening door openings has 1 longitudinal weld;
- the bottom section process method according to the present invention has 6 longitudinal welds, corresponding to the first arc section 11, the second arc section steel plate, the third arc section In the circular arc section steel plate and the fourth circular arc section steel plate, when the steel plates of different wall thicknesses are butted between the adjacent circular arc section steel plates, the welding seam of the circular arc section steel plates of different thicknesses smoothly transitions with a slope not greater than 1:4 . Under the premise of not significantly increasing the complexity of the process, it 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.
- Using the multi-arc section variable-thickness welding process of the wind turbine of the present invention can effectively reduce the weight of the tower and reduce the manufacturing cost.
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Abstract
Disclosed in the present invention are a wind turbine, a round tower door opening structure of a wind turbine and a manufacturing method therefor. A bottom tower section of the round tower door opening structure of a wind turbine comprises six parts of arc section steel plates: one first arc section steel plate, two second arc section steel plates, two third arc section steel plates and one fourth arc section steel plate; a door opening is provided in the first arc section steel plate, the two second arc section steel plates are symmetrical about a vertical center line of the door opening, the two third arc section steel plates are symmetrical about the vertical center line of the door opening, every two adjacent arc section steel plates are welded together, the first arc section steel plate has a thickness greater than each second arc section steel plate, each second arc section steel plate has a thickness greater than each third arc section steel plate, and each third arc section steel plate has a thickness greater than each fourth arc section steel plate. Machining can be achieved at the level of the prior art without obviously increasing the complexity of a process, fatigue strength near a door opening is met, the wall thickness of a tower is reduced, and the mass of the tower is reduced; and the manufacturing cost of the wind turbine tower is reduced.
Description
本申请要求于2020年12月30日提交中国专利局、申请号为202011629598.2、申请名称为“一种风电机组、风电机组圆形塔架门洞结构及制造方法”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 December 30, 2020, with the application number of 202011629598.2 and the application title of "A Wind Turbine, Wind Turbine Circular Tower Doorway Structure and Manufacturing Method". The entire contents of this application are incorporated by reference.
本发明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、风电机组圆形塔架门洞结构及制造方法。The invention belongs to the technical field of wind power generation steel tower design, and particularly relates to a wind turbine, a wind turbine circular tower door structure and a manufacturing 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)。如图2所示，在塔架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). As shown in Figure 2, a local stress increase occurs near the tower 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，相比底段不设开门洞增加了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 that 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 openings.
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。因此，另一种方法是仅对门洞附近和应力集中现象较明显的地方采用开设门洞的壁厚值；对远离门洞和应力集中现象不明显的部分仍然采用不开门洞的壁厚值。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. Therefore, another method is to only use the wall thickness value of the door opening near the door opening and the place where the stress concentration phenomenon is more obvious; for the part far from the door opening and the stress concentration phenomenon is not obvious, the wall thickness value of the door opening is still used.
考虑到开设门洞和不开设门洞的塔架主体壁厚值相差较大，因此需要设计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门洞及制造方法。Considering that the wall thickness of the tower body with and without the door opening is quite different, it is necessary to design a method that can not only satisfy the fatigue strength near the door opening under the existing technology level, but also reduce the wall thickness of the tower and reduce the weight of the tower. Quality door openings and methods of manufacture.
发明内容SUMMARY OF THE INVENTION
为了解决现有技术中存在的问题，本发明提供一种风电机组、风电机组圆形塔架门洞结构及制造方法，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 problems existing in the prior art, the present invention provides a wind turbine, a doorway structure and a manufacturing method of a circular tower of the wind turbine, which can not only satisfy the fatigue strength near the doorway, but also reduce the wall thickness of the tower and the quality of the tower. .
为了实现上述目的，本发明采用的技术方案是：一种风电机组圆形塔架门 洞结构，底段塔架包括部分圆弧段钢板：一段第一圆弧段钢板、两段第二圆弧段钢板、两段第三圆弧段钢板以及一段第四圆弧段钢板；门洞开设在第一圆弧段钢板上，两段第二圆弧段钢板关于门洞竖直中心线对称，两段第三圆弧段钢板关于门洞竖直中心线对称，相邻两段圆弧段钢板焊接，第一圆弧段钢板的厚度大于第二圆弧段钢板的厚度、第二圆弧段钢板的厚度大于第三圆弧段钢板厚度，第三圆弧段钢板厚度大于第四圆弧段钢板。In order to achieve the above-mentioned purpose, the technical scheme adopted in the present invention is: a door structure of a circular tower of a wind turbine, the bottom section of the tower includes a part of the arc section steel plate: a first arc section steel plate, two second arc section sections Steel plates, two third arc-segment steel plates and a fourth arc-segment steel plate; the door opening is opened on the first arc-segment steel plate, the two second arc-segment plates are symmetrical about the vertical centerline of the door opening, and the two third arc-segment plates are The circular arc section steel plate is symmetrical about the vertical center line of the door opening, and the two adjacent circular arc section steel plates are welded. The thickness of the steel plate in the three arc segments, the thickness of the steel plate in the third arc segment is greater than that in the fourth arc segment.
相邻两块钢板焊缝处，较厚的一块钢板沿焊缝设置不大于1:4的斜度削边。At the welding seam of two adjacent steel plates, the thicker steel plate shall be trimmed with a slope of not more than 1:4 along the welding seam.
第一圆弧段钢板、第二圆弧段钢板以及第三圆弧段钢板的厚度沿其各自横向逐渐变化。The thicknesses of the first circular arc section steel plate, the second circular arc section steel plate and the third circular arc section steel plate gradually change along their respective lateral directions.
第一圆弧段钢板、第二圆弧段钢板和第三圆弧段钢板的宽度依次减小。The widths of the first circular arc section steel plate, the second circular arc section steel plate and the third circular arc section steel plate decrease in turn.
第一圆弧段钢板、第二圆弧段钢板和第三圆弧段钢板对应的圆心角分别为2α
1、α
2和α
3；α
1为30°～60°，α
2为10°～30°，α
3为10°～30°；第一圆弧段钢板、第二圆弧段钢板、第三圆弧段钢板以及第四弧段钢板的厚度分别为t
1、t
2、t
3和t
4；t
1为30mm-70mm，t
2为20mm-60mm，t
3为15mm-50mm，t
4为10mm-30mm。
The central angles corresponding to the first circular arc section steel plate, the second circular arc section steel plate and the third circular arc section steel plate are respectively 2α 1 , α 2 and α 3 ; α 1 is 30°～60°, and α 2 is 10°～ 30°, α3 is 10°～30°; the thicknesses of the first circular arc section steel plate, the second circular arc section steel plate, the third circular arc section steel plate and the fourth arc section steel plate are t 1 , t 2 , and t 3 respectively and t 4 ; t 1 is 30mm-70mm, t 2 is 20mm-60mm, t 3 is 15mm-50mm, and t 4 is 10mm-30mm.
门洞的宽度为900mm～1400mm，高度为2.6m-3.2m。The width of the door opening is 900mm-1400mm, and the height is 2.6m-3.2m.
第四圆弧段钢板对应的圆心角为180°。The central angle corresponding to the steel plate of the fourth arc segment is 180°.
门洞的形状为跑道形。The door opening is in the shape of a racetrack.
基于本发明所述风电机组圆形塔架门洞结构的制造方法，第一圆弧段钢板、第二圆弧段钢板、第三圆弧段钢板以及第四弧段钢板在焊接时，先焊接第一圆弧段钢板与两段第二圆弧段钢板；再焊接第二圆弧段钢板与第三圆弧段钢 板，最后将第四弧段钢板与第三圆弧段钢板焊接；并且焊接完成后立即进行热处理。Based on the method for manufacturing a circular tower doorway structure of a wind turbine according to the present invention, when the first circular arc section steel plate, the second circular arc section steel plate, the third circular arc section steel plate and the fourth arc section steel plate are welded, the first circular arc section steel plate, the second circular arc section steel plate, and the fourth arc section steel plate are welded. One arc section steel plate and two second arc section steel plates; then weld the second arc section steel plate and the third arc section steel plate, and finally weld the fourth arc section steel plate and the third arc section steel plate; and the welding is completed heat treatment immediately after.
一种风力发电机组，塔架门洞的结构采用本发明所述风电机组圆形塔架门洞结构。A wind turbine generator set, the structure of the tower door opening adopts the circular tower door opening structure of the wind turbine generator set of the present invention.
与现有技术相比，本发明至少具有以下有益效果：相邻两段圆弧段钢板焊接，第一圆弧段钢板的厚度大于第二圆弧段钢板的厚度，第二圆弧段钢板的厚度大于第三圆弧段钢板厚度，第三圆弧段钢板厚度大于第四圆弧段钢板；在门洞处的钢板厚度最大，抵消开设门洞对其强度的降低效应，其余钢板的厚度逐渐降低，使得塔架底段的强度符合设计要求，在没有显著增加工艺复杂程度的前提下，在现有技术水平下能实现加工，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；很大程度的节省风电机组塔架的制造成本。Compared with the prior art, the present invention has at least the following beneficial effects: welding two adjacent arc-segment steel plates, the thickness of the first arc-segment steel plate is greater than that of the second arc-segment steel plate, and the thickness of the second arc-segment steel plate is greater than that of the second arc-segment steel plate. The thickness of the steel plate in the third arc section is larger than that of the steel plate in the third arc section, and the thickness of the steel plate in the third arc section is larger than that in the fourth arc section. The strength of the bottom section of the tower meets the design requirements. On the premise of not significantly increasing the complexity of the process, it can be processed under the existing technical level, which not only meets the fatigue strength near the door opening, but also reduces the wall thickness of the tower and reduces the thickness of the tower. The quality of the frame is greatly saved; the manufacturing cost of the wind turbine tower is greatly saved.
基于现有焊接和加工工艺进行焊接，对所述第一圆弧段钢板、第二圆弧段钢板、第三圆弧段钢板以及第四弧段钢板依次进行焊接，并进行热处理，能实现稳定可靠的生产。Based on the existing welding and processing technology, the first arc section steel plate, the second arc section steel plate, the third arc section steel plate and the fourth arc section steel plate are welded in sequence, and heat treatment is performed to achieve stability. Reliable production.
下面结合附图对本发明的示例性实施例进行详细描述，本发明的以上和其它特点及优点将变得更加清楚，附图中：The above and other features and advantages of the present invention will become more apparent from the following detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, in which:
图1传统风力发电机组钢制塔架底段结构图；Figure 1. Structure diagram of the bottom section of the steel tower of a traditional wind turbine;
图2是塔架门洞附近应力集中现象示意图；Figure 2 is a schematic diagram of the stress concentration phenomenon near the tower door opening;
图3是新型风力发电机组钢制塔架底段结构图；Figure 3 is a structural diagram of the bottom section of the steel tower of the new wind turbine;
图4是新型风力发电机组钢制塔架不同厚度钢板坡口过渡示意图。Figure 4 is a schematic diagram of the transition of steel plate grooves of different thicknesses of the steel tower of the new wind turbine.
附图中，1-门洞，11-第一圆弧段钢板，12-第二圆弧段钢板，13-第三圆弧段钢板，14-第四圆弧段钢板。In the drawings, 1 - door opening, 11 - first arc section steel plate, 12 - second arc section steel plate, 13 - third arc section steel plate, 14 - fourth arc section steel plate.
下面结合附图对本发明做详细叙述，在附图中示出了本发明的示例性实施例。The present invention is described in detail below with reference to the accompanying drawings, in which exemplary embodiments of the present invention are shown.
参考图1和图2，一种风电机组圆形塔架门洞结构，底段塔架10包括6部分圆弧段钢板：一段第一圆弧段钢板11、两段第二圆弧段钢板12、两段第三圆弧段钢板13以及一段第四圆弧段钢板14；门洞开设在第一圆弧段钢板11上，两段第二圆弧段钢板12关于门洞竖直中心线对称，两段第三圆弧段钢板13关于门洞竖直中心线对称，相邻两段圆弧段钢板焊接，第一圆弧段钢板11的厚度大于第二圆弧段钢板12的厚度、第二圆弧段钢板12的厚度大于第三圆弧段钢板13厚度，第三圆弧段钢板13厚度大于第四圆弧段钢板14；门洞的形状为跑道形；第四圆弧段钢板14对应的圆心角为180°。Referring to FIGS. 1 and 2 , a doorway structure of a circular tower of a wind turbine, the bottom tower 10 includes six parts of arc-segment steel plates: a first arc-segment steel plate 11 , two second arc-segment steel plates 12 , Two third arc-segment steel plates 13 and a fourth arc-segment steel plate 14; the door opening is opened on the first arc-segment steel plate 11, and the two second arc-segment steel plates 12 are symmetrical about the vertical centerline of the door opening. The third circular arc section steel plate 13 is symmetrical about the vertical center line of the doorway, and two adjacent circular arc section steel plates are welded. The thickness of the first circular arc section steel plate 11 is greater than that of the second circular arc section steel plate 12, The thickness of the steel plate 12 is greater than the thickness of the third arc segment steel plate 13, and the thickness of the third arc segment steel plate 13 is greater than that of the fourth arc segment steel plate 14; the shape of the door opening is a racetrack shape; the central angle corresponding to the fourth arc segment steel plate 14 is 180°.
相邻两块钢板焊缝处，较厚的一块钢板沿焊缝设置不大于1:4的斜度削边。At the welding seam of two adjacent steel plates, the thicker steel plate shall be trimmed with a slope of not more than 1:4 along the welding seam.
第一圆弧段钢板11、第二圆弧段钢板12以及第三圆弧段钢板13的厚度沿其各自横向逐渐变化。The thicknesses of the first circular arc segment steel plate 11 , the second circular arc segment steel plate 12 and the third circular arc segment steel plate 13 gradually change along their respective lateral directions.
第一圆弧段钢板11、第二圆弧段钢板12和第三圆弧段钢板13的宽度依次减小。The widths of the first circular arc section steel plate 11 , the second circular arc section steel plate 12 and the third circular arc section steel plate 13 decrease sequentially.
第一圆弧段钢板11、第二圆弧段钢板12和第三圆弧段钢板13对应的圆心角分别为2α
1、α
2和α
3；α
1为30°～60°，α
2为10°～30°，α
3为10°～30°；第一圆弧段钢板11、第二圆弧段钢板12、第三圆弧段钢板13以及第四 弧段钢板14的厚度分别为t
1、t
2、t
3和t
4；t
1为30mm-70mm，t
2为20mm-60mm，t
3为15mm-50mm，t
4为10mm-30mm。
The central angles corresponding to the first circular arc section steel plate 11, the second circular arc section steel plate 12 and the third circular arc section steel plate 13 are respectively 2α 1 , α 2 and α 3 ; α 1 is 30° to 60°, and α 2 is 10°～30°, α3 is 10°～30°; the thicknesses of the first circular arc section steel plate 11, the second circular arc section steel plate 12, the third circular arc section steel plate 13 and the fourth arc section steel plate 14 are respectively t 1 , t 2 , t 3 and t 4 ; t 1 is 30mm-70mm, t 2 is 20mm-60mm, t 3 is 15mm-50mm, and t 4 is 10mm-30mm.
门洞的宽度为900mm～1400mm，高度为2.6m-3.2m。The width of the door opening is 900mm-1400mm, and the height is 2.6m-3.2m.
基于本发明所述风电机组圆形塔架门洞结构的制造方法，第一圆弧段钢板11、第二圆弧段钢板12、第三圆弧段钢板13以及第四弧段钢板14在焊接时，先焊接第一圆弧段钢板11与两段第二圆弧段钢板12；再焊接第二圆弧段钢板12与第三圆弧段钢板13，最后将第四弧段钢板14与第三圆弧段钢板13焊接；并且焊接完成后立即进行热处理。Based on the manufacturing method of the circular tower door structure of the wind turbine according to the present invention, the first arc section steel plate 11 , the second arc section steel plate 12 , the third arc section steel plate 13 and the fourth arc section steel plate 14 are welded during welding. , first weld the first arc section steel plate 11 and the two second arc section steel plates 12; then weld the second arc section steel plate 12 and the third arc section steel plate 13, and finally weld the fourth arc section steel plate 14 with the third arc section steel plate 14 The arc section steel plate 13 is welded; and heat treatment is performed immediately after the welding is completed.
本发明还可以以一种风力发电机组进行实施，所述风力发电塔架门洞的结构采用本发明所述风电机组圆形塔架门洞结构。The present invention can also be implemented with a wind turbine, and the structure of the door opening of the wind power generation tower adopts the circular tower door structure of the wind turbine according to the present invention.
本发明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降低塔架质量的结构及制造方法，根据本发明所提出的风力发电机组门洞所在的塔架底段的结构，海上风机塔架门洞所在的塔筒段包括多种不同厚度的钢板，塔筒段在直径最大处向门洞处，塔筒段的厚度逐渐增大，塔筒段从直径最大处向门洞处的塔筒以其中心面对称，分为若干份弧段，每个弧段对应一个圆心角，具体参考图3，每一个弧段的变厚度部分满足下列要求：The present invention proposes a structure and a manufacturing method which can satisfy the fatigue strength near the door opening under the existing technological level, and can reduce the wall thickness of the tower and the quality of the tower. The structure of the bottom section of the tower, the tower section where the doorway of the offshore wind turbine tower is located includes a variety of steel plates with different thicknesses. The tower at the largest point towards the door opening is symmetrical with its center plane, and is divided into several arc segments, each arc segment corresponds to a central angle. Refer to Figure 3 for details. The variable thickness part of each arc segment meets the following requirements:
提供一种风里发电机组的底段塔架的工艺方法，参考图图3，以门洞数值中心线为中心，底段塔架10共分成6部分：圆弧段钢板14、第一圆弧段钢板11、两段关于门洞中心线对称的第三圆弧段钢板13和两段关于门洞中心线对称的第二圆弧段钢板12；第一圆弧段钢板11，其中，t
1代表所述变厚度部分 的第一圆弧段钢板11的厚度；t
2代表所述变厚度部分的第二圆弧段钢板12的厚度；t
3代表所述变厚度部分的第三圆弧段钢板13的厚度；t
4代表所述变厚度部分的第四圆弧段钢板14的厚度；2α
1代表所述圆弧段钢板11对应的圆心角角度；α
2代表所述圆弧段钢板12对应的圆心角角度；α
3代表所述圆弧段钢板13对应的圆心角角度。图4中，塔架门洞所在的塔筒焊缝20包括不同厚度的圆弧段钢板的焊缝，所述焊缝都采用1:4的削边工艺进行过渡。
Provide a process method for the bottom section tower of the wind power generator set. Referring to FIG. 3, with the numerical center line of the door opening as the center, the bottom section tower 10 is divided into 6 parts: the arc section steel plate 14, the first arc section Steel plate 11, two third arc-segment steel plates 13 that are symmetrical about the centerline of the doorway, and two second arc-segment steel plates 12 that are symmetrical about the centerline of the doorway; the first arc-segment steel plate 11, where t 1 represents the The thickness of the first arc segment steel plate 11 of the variable thickness portion; t 2 represents the thickness of the second arc segment steel plate 12 of the variable thickness portion; t 3 represents the thickness of the third arc segment steel plate 13 of the variable thickness portion thickness; t 4 represents the thickness of the fourth circular arc segment steel plate 14 of the variable thickness portion; 2α 1 represents the central angle angle corresponding to the circular arc segment steel plate 11 ; α 2 represents the circle center corresponding to the circular arc segment steel plate 12 Angular angle; α 3 represents the central angle corresponding to the steel plate 13 of the circular arc segment. In FIG. 4 , the tower welding seam 20 where the tower door opening is located includes welding seams of circular arc section steel plates of different thicknesses, and the welding seams are all transitioned by a 1:4 edge trimming process.
本发明所提出的新型风力发电机组门洞所在的塔架底段的工艺方法，所述海上风机塔架门洞所在的塔筒段包括多种不同厚度的钢板，并且所述变厚度部分满足下列要求：The process method for the bottom section of the tower where the door opening of the novel wind turbine is located in the present invention, the tower section where the door opening of the offshore wind turbine tower is located includes a variety of steel plates with different thicknesses, and the variable thickness part meets the following requirements:
根据本发明的实例性实施例，在所述圆弧段中，t
1，t
2，t
3，t
4和α
1，α
2，α
3分别为：
According to an exemplary embodiment of the present invention, in the arc segment, t 1 , t 2 , t 3 , t 4 and α 1 , α 2 , α 3 are respectively:
以更大程度地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降低塔架质量。In order to meet the fatigue strength near the door opening to a greater extent under the existing technological level, the wall thickness of the tower can be reduced and the quality of the tower can be reduced.
表2示出了本发明示例性实施例给出的开设门洞设计结果与传统开设门洞设计给出的设计结果相比，底段塔架的质量从59.99t减少到36.07t，降幅达 到39.9％。从结果来看，传统开设门洞的设计方法有1道纵焊缝；根据本发明的底段工艺方法有6道纵焊缝，对应第一圆弧段11、第二圆弧段钢板、第三圆弧段钢板和第四圆弧段钢板中，相邻圆弧段钢板之间不同壁厚的钢板对接时，不同厚度的圆弧段钢板的焊缝以不大于1：4的斜度平滑过渡。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 shows that the design result of opening the door opening given by the exemplary embodiment of the present invention is compared with the design result given by the traditional opening opening design. From the results, the traditional design method for opening door openings has 1 longitudinal weld; the bottom section process method according to the present invention has 6 longitudinal welds, corresponding to the first arc section 11, the second arc section steel plate, the third arc section In the circular arc section steel plate and the fourth circular arc section steel plate, when the steel plates of different wall thicknesses are butted between the adjacent circular arc section steel plates, the welding seam of the circular arc section steel plates of different thicknesses smoothly transitions with a slope not greater than 1:4 . Under the premise of not significantly increasing the complexity of the process, it 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.
表2Table 2
基于表2中示出的计算结果，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，可以节约大约1674万元，即，根据本发明的采用塔架底段多圆弧段变厚度焊接的工艺方法可使制造成本降低约1674万元。Based on the calculation results shown in Table 2, it is estimated that there are 50 wind turbines installed in a wind farm and the price of 14,000 yuan per ton of steel plates can save about 16.74 million yuan. The multi-arc segment variable-thickness welding process can reduce the manufacturing cost by about 16.74 million yuan.
采用本发明的风力发电机组的多圆弧段变厚度焊接的工艺方法可有效从而减轻塔架重量并且降低制造成本。Using the multi-arc section variable-thickness welding process of the wind turbine of the present invention can effectively reduce the weight of the tower and reduce the manufacturing cost.
虽然已经参照本发明的示例性实施例具体示出和描述了本发明，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的本发明的精神和范围的情况下，可以对其进行形式和细节的各种改变。While the present invention has been particularly shown and described with reference to the exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that modifications may be made thereto without departing from the spirit and scope of the invention as defined by the claims. Various changes in form and detail.
Claims (10)
- 一种风电机组圆形塔架门洞结构，其特征在于，底段塔架(10)包括6部分圆弧段钢板：一段第一圆弧段钢板(11)、两段第二圆弧段钢板(12)、两段第三圆弧段钢板(13)以及一段第四圆弧段钢板(14)；门洞开设在第一圆弧段钢板(11)上，两段第二圆弧段钢板(12)关于门洞竖直中心线对称，两段第三圆弧段钢板(13)关于门洞竖直中心线对称，相邻两段圆弧段钢板焊接，第一圆弧段钢板(11)的厚度大于第二圆弧段钢板(12)的厚度、第二圆弧段钢板(12)的厚度大于第三圆弧段钢板(13)厚度，第三圆弧段钢板(13)厚度大于第四圆弧段钢板(14)。A circular tower doorway structure for a wind turbine, characterized in that the bottom section tower (10) includes 6 parts of circular arc section steel plates: a first circular arc section steel plate (11), and two second circular arc section steel plates ( 12), two third arc-segment steel plates (13) and a fourth arc-segment steel plate (14); the door opening is opened on the first arc-segment steel plate (11), and the two second arc-segment steel plates (12) ) is symmetrical with respect to the vertical centerline of the door opening, the two third arc-section steel plates (13) are symmetrical with respect to the vertical centerline of the doorway, and the two adjacent arc-section steel plates are welded, and the thickness of the first arc-section steel plate (11) is greater than The thickness of the second arc section steel plate (12) and the thickness of the second arc section steel plate (12) are greater than the thickness of the third arc section steel plate (13), and the thickness of the third arc section steel plate (13) is greater than that of the fourth arc section Section steel plate (14).
- 根据权利要求1所述的风电机组圆形塔架门洞结构，其特征在于，相邻两块钢板焊缝处，较厚的一块钢板沿焊缝设置不大于1:4的斜度削边。The door structure of the circular tower of the wind turbine according to claim 1, wherein, at the welding seam of two adjacent steel plates, a thicker steel plate is provided with a slope of not more than 1:4 along the welding seam.
- 根据权利要求1所述的风电机组圆形塔架门洞结构，其特征在于，第一圆弧段钢板(11)、第二圆弧段钢板(12)以及第三圆弧段钢板(13)的厚度沿其各自横向逐渐变化。The door structure of the circular tower of a wind turbine according to claim 1, wherein the first circular arc section steel plate (11), the second circular arc section steel plate (12) and the third circular arc section steel plate (13) The thicknesses vary gradually along their respective transverse directions.
- 根据权利要求1所述的风电机组圆形塔架门洞结构，其特征在于，第一圆弧段钢板(11)、第二圆弧段钢板(12)和第三圆弧段钢板(13)的宽度依次减小。The door structure of the circular tower of a wind turbine according to claim 1, characterized in that the first circular arc section steel plate (11), the second circular arc section steel plate (12) and the third circular arc section steel plate (13) The width decreases sequentially.
- 根据权利要求1所述的风电机组圆形塔架门洞结构，其特征在于，第一圆弧段钢板(11)、第二圆弧段钢板(12)和第三圆弧段钢板(13)对应的圆心角分别为2α 1、α 2和α 3；α 1为30°～60°，α 2为10°～30°，α 3为10°～30°；第一圆弧段钢板(11)、第二圆弧段钢板(12)、第三圆弧段钢板(13)以及第四弧段钢板(14)的厚度分别为t 1、t 2、t 3和t 4；t 1为30mm-70mm， t 2为20mm-60mm，t 3为15mm-50mm，t 4为10mm-30mm。 The door opening structure of a circular tower of a wind turbine according to claim 1, wherein the first circular arc section steel plate (11), the second circular arc section steel plate (12) and the third circular arc section steel plate (13) correspond to The central angles of α1, α2 and α3 are respectively 2α1 , α2 and α3; α1 is 30 °～60°, α2 is 10 °～ 30 °, α3 is 10°～30°; the first circular arc section steel plate (11) , the thickness of the second arc section steel plate (12), the third arc section steel plate (13) and the fourth arc section steel plate (14) are respectively t 1 , t 2 , t 3 and t 4 ; t 1 is 30mm- 70mm, t 2 is 20mm-60mm, t 3 is 15mm-50mm, t 4 is 10mm-30mm.
- 根据权利要求1所述的风电机组圆形塔架门洞结构，其特征在于，门洞的宽度为900mm～1400mm，高度为2.6m-3.2m。The door opening structure of the circular tower of the wind turbine according to claim 1, wherein the width of the door opening is 900mm-1400mm, and the height is 2.6m-3.2m.
- 根据权利要求1所述的风电机组圆形塔架门洞结构，其特征在于，第四圆弧段钢板(14)对应的圆心角为180°。The door structure of the circular tower of a wind turbine according to claim 1, characterized in that the central angle corresponding to the fourth circular arc segment steel plate (14) is 180°.
- 根据权利要求1所述的风电机组圆形塔架门洞结构，其特征在于，门洞的形状为跑道形。The door opening structure of a circular tower of a wind turbine according to claim 1, wherein the door opening is in the shape of a racetrack.
- 基于权利要求1所述风电机组圆形塔架门洞结构的制造方法，其特征在于，第一圆弧段钢板(11)、第二圆弧段钢板(12)、第三圆弧段钢板(13)以及第四弧段钢板(14)在焊接时，先焊接第一圆弧段钢板(11)与两段第二圆弧段钢板(12)；再焊接第二圆弧段钢板(12)与第三圆弧段钢板(13)，最后将第四弧段钢板(14)与第三圆弧段钢板(13)焊接；并且焊接完成后立即进行热处理。The method for manufacturing a circular tower doorway structure for a wind turbine according to claim 1, wherein the first circular arc section steel plate (11), the second circular arc section steel plate (12), and the third circular arc section steel plate (13) ) and the fourth arc-segment steel plate (14), firstly weld the first arc-segment steel plate (11) and the two second arc-segment steel plates (12); and then weld the second arc-segment steel plate (12) and The third arc segment steel plate (13) is finally welded with the fourth arc segment steel plate (14) and the third arc segment steel plate (13); and heat treatment is performed immediately after the welding is completed.
- 一种风力发电机组，其特征在于，塔架门洞的结构采用权利要求1所述风电机组圆形塔架门洞结构。A wind turbine generator set is characterized in that the structure of the tower door opening adopts the circular tower door opening structure of the wind turbine generator set in claim 1 .
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| CN202011629598.2A CN112648148A (en) | 2020-12-30 | 2020-12-30 | Wind turbine generator, circular tower frame door opening structure of wind turbine generator and manufacturing method |
| CN202011629598.2 | 2020-12-30 |
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| WO2022143246A1 true WO2022143246A1 (en) | 2022-07-07 |
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| CN112648148A (en) * | 2020-12-30 | 2021-04-13 | 华能国际电力股份有限公司江苏清洁能源分公司 | Wind turbine generator, circular tower frame door opening structure of wind turbine generator and manufacturing method |
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