CN111396244A - Wind power blade and stringer reinforcing structure and method thereof - Google Patents
Wind power blade and stringer reinforcing structure and method thereof Download PDFInfo
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- CN111396244A CN111396244A CN202010195783.9A CN202010195783A CN111396244A CN 111396244 A CN111396244 A CN 111396244A CN 202010195783 A CN202010195783 A CN 202010195783A CN 111396244 A CN111396244 A CN 111396244A
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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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2240/00—Components
- F05B2240/20—Rotors
- F05B2240/30—Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor
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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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a wind power blade and a stringer reinforcing structure and method thereof, which comprise a middle main structure and connecting structures extending at two side ends of the main structure respectively, wherein the main structure is an arch structure opposite to the connecting structures, the connecting structures of one or more stringer reinforcing structures are connected with a part to be reinforced, and the part to be reinforced is a wind power blade upper web and/or a blade shell. The invention can improve the buckling resistance and the shearing resistance of the blade, does not increase the thickness of the core material of the shell of the blade and the thickness of the web fiber cloth layer, and improves the reliability of the manufacturing quality of the blade.
Description
Technical Field
The invention relates to the field of wind power blade manufacturing, in particular to a wind power blade and a stringer reinforcing structure and method thereof.
Background
The buckling resistance and the shearing resistance of the wind power blade are important indexes for measuring the safety of the wind power blade. With the rapid development of the wind power industry, the diameter of a wind wheel of a wind turbine blade unit is longer and longer, blades become softer and softer, and the difficulty of the anti-buckling and anti-shearing design of the wind turbine blades is increased.
The buckling resistance and the shearing resistance of the wind power blade can be improved by increasing the thickness of the core material of the blade shell and the thickness of the fiber cloth layer of the web plate; however, the thickness of the shell core material and the thickness of the web fiber cloth layer cannot be increased without limit, otherwise, the risk of resin impregnation is existed, and serious manufacturing defects are caused, which brings challenges to the buckling resistance and shearing resistance design of the large wind power flexible blade.
At present, a large wind power flexible blade needs to have enough buckling resistance and shearing resistance, although the buckling resistance and the shearing resistance of the blade can be improved by increasing the thickness of a shell core material of the blade and the thickness of a web fiber cloth layer, huge manufacturing risks can be brought, and the serious defect that resin is not filled thoroughly is formed.
Disclosure of Invention
The invention aims to provide a wind power blade and a stringer reinforcing structure and method thereof.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a stringer reinforcing structure for a wind power blade comprises a middle main structure and connecting structures extending from two side ends of the main structure respectively, wherein the main structure is an arch structure opposite to the connecting structures, the connecting structures of one or more stringer reinforcing structures are connected with a part to be reinforced, and the part to be reinforced is a part to be reinforced in buckling resistance and/or shearing resistance on the wind power blade.
Preferably, the main structure of the stringer reinforcing structure comprises a core material layer of an intermediate layer and fiber cloth layers on the upper surface and the lower surface of the core material layer, or the main structure of the stringer reinforcing structure comprises fiber cloth layers on the inner side and the outer side; the fiber cloth layer is unidirectional cloth, biaxial cloth or triaxial cloth.
Preferably, the connection structure of the stringer reinforcing structure is an adhesive flange.
Preferably, the connecting structure comprises a fiber cloth layer, and the fiber cloth layer is a unidirectional cloth, a biaxial cloth or a triaxial cloth.
Preferably, the stringer reinforcing structure is a trapezoidal stringer reinforcing structure, and an angle formed between a main structure of the trapezoidal stringer reinforcing structure and the connecting structure is an obtuse angle, a right angle or an acute angle; or the stringer reinforcing structure is an omega-shaped stringer reinforcing structure, and a main structure of the omega-shaped stringer reinforcing structure is an arc-shaped or symmetrical curve.
Preferably, the component to be reinforced comprises a blade shell and/or a web of the wind turbine blade.
The invention also provides a wind power blade, which comprises a blade shell and a web, wherein one or more stringer reinforcing structures are/is/are arranged on the blade shell and/or the web.
Preferably, the stringer reinforcing structure is arranged on the front surface and/or the back surface of the web, the connecting structure of the stringer reinforcing structure is connected with the front surface and/or the back surface of the web, and the length direction of the stringer reinforcing structure forms an angle with the length direction of the blade; or the stringer reinforcing structure is arranged on the core material at the front edge position or the rear edge position of the inner side of the blade shell, and the length direction of the stringer reinforcing structure is consistent with the length direction of the blade or forms a certain angle with the length direction of the blade.
Preferably, the stringer reinforcing structure is arranged on the front surface and/or the back surface of the web, and the angle formed between the length direction of the stringer reinforcing structure and the length direction of the blade ranges from 20 ° to 90 °;
or the stringer reinforcing structure is arranged on the core material at the front edge position or the rear edge position of the inner side of the blade shell, and the angle formed between the stringer reinforcing structure and the length direction of the blade is less than 20 degrees.
The present invention further provides a method of adding stringer strengthening to a blade shell and/or a web as described above, the method comprising the steps of:
determining the position of a stringer reinforcing structure to be added on the blade shell and/or the web, and the structural form and size of the stringer reinforcing structure to be added;
manufacturing a mould of the stringer reinforcing structure;
carrying out layering and pouring curing on the blade shell and/or the web, and prefabricating a stringer reinforcing structure in a mould of the stringer reinforcing structure;
according to the positioning of the stringer strengthening structures in the blade shell and/or the web, connecting the blade shell and/or the web with the connecting structures of the stringer strengthening structures respectively;
and (3) carrying out die assembly molding on the blade shell or placing the web plate in the blade shell.
Compared with the prior art, the invention has the beneficial effects that:
(1) the stringer reinforcing structure is placed in the blade shell, the effective thickness of the blade is increased equivalently, and the buckling resistance of the blade shell is improved; the stringer reinforcing structure is a hollow structure, the material consumption is less, and compared with the method of directly improving the thickness of the core material of the blade shell, the material cost of the blade is reduced; because the core material thickness required by the large flexible blade is larger, if the thickness of the core material of the blade shell is directly increased, higher perfusion risk exists; the stringer reinforcing structure and the cured blade shell are bonded into a whole through structural adhesive, the thickness of a core material of the blade shell can be controlled within a certain range, and then the local effective thickness of the blade shell is improved by adding the stringer reinforcing structure, so that the buckling resistance of the blade is improved, the risk of the perfusion defect of the blade shell is reduced, and the reliability of the quality of the blade is improved;
(2) the stringer reinforcing structure is arranged on the web plate of the blade, the web plate of the blade mainly plays a role in shear resistance, the effective cross section area of the web plate can be increased through the stringer reinforcing structure, and the shear resistance of the web plate is improved; compared with the method for improving the shearing resistance of the web by improving the thickness of the web cloth layer, the local shearing resistance of the web is selectively improved through the stringer reinforcing structure, the cloth layer thickness and the core material thickness of the web can be controlled within a certain range, and the risk of the web perfusion defect of the large flexible blade can be effectively reduced.
Drawings
FIG. 1 is a perspective view of a trapezoidal stringer reinforcing structure for a wind turbine blade according to the present invention;
FIG. 2 is a perspective view of an omega-shaped stringer reinforcing structure for a wind turbine blade according to the present invention;
FIG. 3 is a cross-sectional view of a trapezoidal stringer stiffening structure of the present invention;
FIG. 4 is a cross-sectional view of an omega stringer stiffening arrangement according to the invention;
5a-5b are schematic views of stringer strengthening structures of the present invention arranged at the web of a blade;
fig. 6 a-6 b are schematic views of the stringer strengthening structures of the present invention arranged in a blade shell.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 6, the stringer strengthening structure for a wind turbine blade provided by the present invention may be arranged at the weak points of the buckling and shearing resistance on the blade shell 300 and the blade web 400 to enhance the buckling and shearing resistance of the whole blade. As shown in fig. 1-2, the stringer reinforcing structure 1 comprises a main structure 1-1 in the middle and bonding flanges 1-2 extending at both side ends of the main structure 1-1. The main structure 1-1 is a raised structure relative to the plane of the adhesive flange 1-2. Illustratively, according to the cross-sectional shape of the main structure 1-1, the stringer reinforcing structure 1 can be divided into a trapezoidal stringer reinforcing structure 100 (shown in fig. 1 and 3) in the first embodiment and an omega-shaped stringer reinforcing structure 200 (shown in fig. 2 and 4) in the second embodiment; however, the present invention is not limited thereto, and any stringer reinforcing structure may be used as long as it can satisfy the requirements of enhancing the buckling resistance and the shear resistance of the whole blade.
The first embodiment is as follows:
as shown in fig. 1 and fig. 3 in combination, in the first embodiment, the trapezoidal stringer reinforcing structure 100 includes a main structure 11 and an adhesive flange 12. The main structure 11 includes a core material 112 as an intermediate layer and fiber cloth layers 111 on the upper and lower surfaces of the core material 112. The core material of the intermediate layer is not essential, and the core material may be optionally added or not added according to design requirements. The bonding flange 12 of the stringer reinforcing structure 100 includes a fiber cloth layer and does not include a core material.
The fiber cloth layer in the main structure 11 or the fiber cloth layer in the bonding flange 12 can be unidirectional cloth, biaxial cloth or triaxial cloth; the core material 112 may be PET, PVC, or Balsa wood.
For example, the angle formed by the main structure 11 and the bonding flange 12 of the trapezoidal stringer reinforcing structure 100 may be an obtuse angle, a right angle or an acute angle, which is not limited by the invention.
In the second embodiment:
as shown in fig. 2 and fig. 4, in the second embodiment, the Ω -shaped stringer reinforcing structure 200 includes a main structure 21 and an adhesive flange 22. The main structure 21 includes a core material 212 as an intermediate layer and fiber cloth layers 211 on the upper and lower surfaces of the core material 212. The core material of the intermediate layer is not essential, and the core material may be optionally added or not added according to design requirements. The adhesive flange 22 of the stringer reinforcing structure 200 includes a fiber cloth layer and does not include a core material.
The fiber cloth layer in the main structure 21 or the fiber cloth layer in the bonding flange 22 can be unidirectional cloth, biaxial cloth or triaxial cloth; the core material 212 may be PET, PVC, or Balsa wood.
For example, the shape of the main structure 21 of the Ω -shaped stringer reinforcing structure 200 may be a circular arc or other symmetrical curves, which is not limited by the invention.
Example three:
the stringer reinforcing structures 1 (such as the stringer reinforcing structures 100 or 200) in the first and/or second embodiments are bonded with the cured blade shell 300 and/or the blade web 400 by structural glue using the bonding flanges 12 or 22, as shown in fig. 5a to 5b and fig. 6a to 6 b. The directions of the X-axis, the Y-axis and the Z-axis are shown in the figure for easier understanding of the present embodiment, and the direction of the Z-axis in the figure is the length direction of the blade, the length direction of the blade means that the blade root points to the blade tip, the Z-axis in fig. 6b is the direction perpendicular to the paper surface in fig. 6a, the X-axis points from the pressure surface to the suction surface of the blade, and the Y-axis points from the leading edge to the trailing edge of the blade.
When the stringer reinforcing structures 1 are arranged on the web 400, a plurality of stringer reinforcing structures 1 are respectively arranged on the front surface 40a (i.e. the side facing outwards from the vertical plane of the drawing in fig. 5 a) and the back surface 40b (i.e. the side facing inwards from the vertical plane of the drawing in fig. 5 a) of the web of the blade; in fig. 5a and 5b, the solid lines represent the stringer reinforcing structures on the front side of the web, and the dashed lines represent the stringer reinforcing structures on the back side of the web. The stringer reinforcing structure 1 is connected with the front surface and the back surface of the web plate through structural adhesive in a bonding mode through the bonding flange. Illustratively, the lengthwise direction of the stringer strengthening structure 1 is at an angle to the lengthwise direction of the blade, for example in the range of 20 ° to 90 °. Fig. 5a is suitable for the case where the number of stringer reinforcing structures to be used is small, and fig. 5b is suitable for the case where the number of stringer reinforcing structures to be used is large.
When the stringer reinforcing structures 1 are arranged on the blade shell 300, a plurality of stringer reinforcing structures 1 are placed at the core material at the leading edge position or the trailing edge position inside the blade shell. Illustratively, the lengthwise direction of the stringer reinforcing structure 1 substantially coincides with the lengthwise direction of the blade, for example, the angle difference between the lengthwise direction of the stringer reinforcing structure 1 and the lengthwise direction of the blade is within 20 °, i.e., the angle formed between the lengthwise direction of the stringer reinforcing structure 1 and the lengthwise direction of the blade is less than 20 °.
The Euler formula of the critical force of the slender strut is as follows:
in formula (1), E is the Young's modulus of the material, I is the moment of inertia of the cross section of the rod, mu is a length coefficient related to the constraint conditions at the two ends of the rod, and L is the length of the rod, wherein the moment of inertia of the cross section is as follows by taking an annular section rod as an example:
in the formula (2), b is the width of a rectangular cross section; h is the thickness of the rectangular cross section.
As can be seen from the above equations (1) and (2), for an elongated rod with a rectangular cross section, the buckling resistance is proportional to the third power of the thickness, and therefore, the buckling resistance can be obviously improved by increasing the thickness of the blade shell.
The stringer reinforcing structure 1 in the first embodiment and/or the second embodiment is placed in the blade shell 300, and the following effects are achieved: (1) the stringer strengthening structure 1 is equivalent to increase the effective thickness of the blade, and the buckling resistance of the blade shell is improved; (2) the stringer reinforcing structure 1 is a hollow structure, the material consumption is less, and compared with the method of directly improving the thickness of the core material of the blade shell 300, the material cost of the blade is reduced; (3) because the core material thickness required by the large flexible blade is larger, if the thickness of the core material of the blade shell is directly increased, higher perfusion risk exists; the stringer reinforcing structure 1 is bonded with the cured blade shell through structural adhesive to form a whole, the thickness of a core material of the blade shell 300 can be controlled within a certain range, and then the local effective thickness of the blade shell is improved by adding the stringer reinforcing structure 1, so that the buckling resistance of the blade is improved, the risk of the perfusion defect of the blade shell is reduced, and the reliability of the quality of the blade is improved.
In addition, the web 400 of the wind turbine blade mainly functions to resist shearing, and the stringer reinforcing structure in the first embodiment and/or the second embodiment is utilized: (1) the effective cross-sectional area of the web 400 can be increased, and the shear resistance of the web 400 is improved; (2) compared with the method for improving the shearing resistance of the web by improving the thickness of the web cloth layer, the method has the advantages that the local shearing resistance of the web is selectively improved through the stringer reinforcing structure, the cloth layer thickness and the core material thickness of the web can be controlled within a certain range, and the risk of the web perfusion defect of the large flexible blade can be effectively reduced.
It should be noted that the stringer reinforcing structure of the present invention is not limited to the web and the blade shell of the wind turbine blade, and is also applicable to other components on the wind turbine blade that need to improve the buckling resistance or the shear resistance, and the details of the present invention are not repeated herein.
Example four:
the invention provides a method for adding a stringer strengthening structure to a blade shell, which comprises the following steps:
s1, determining the position of a stringer reinforcing structure in the blade shell, the structure and the size of the stringer by design;
the positions where the stringers need to be added are weak points on the blade shell for resisting buckling; the structure of the stringer can be an omega-shaped stringer reinforcing structure or a trapezoidal stringer reinforcing structure, and the size of the structure of the stringer is matched with the position of the stringer needing to be increased, the requirement of buckling resistance and the like.
S2, manufacturing a mould of the stringer reinforcing structure according to the stringer reinforcing structure and the size designed in the step S1;
s3, layering the blade shell, and pouring and curing;
s4, prefabricating the stringer reinforcing structure in a mould of the stringer reinforcing structure while pouring and curing the blade shell;
s5, bonding the bonding flanges of the blade shell and the stringer reinforcing structure through structural adhesive according to the positioning of the stringer reinforcing structure in the blade shell;
and S6, performing mold clamping molding on the shell.
The invention provides a method for adding a stringer reinforcing structure to a blade web, which comprises the following steps:
t1, determining the position of the stringer to be added in the blade web, the structure and dimensions of the stringer by design, the arrangement of the stringer in the web may be as shown in FIG. 5a or FIG. 5 b. The positions where the stringers need to be added are weak points of the blade web for resisting shearing; the structure of the stringer can be an omega-shaped stringer reinforcing structure or a trapezoidal stringer reinforcing structure, and the size of the structure of the stringer is matched with the position of the stringer needing to be added, the requirement of shear resistance and the like. Fig. 5a is suitable for the case where the number of stringer reinforcing structures to be used is small, and fig. 5b is suitable for the case where the number of stringer reinforcing structures to be used is large, that is, the number of stringer reinforcing structures is also adjusted according to actual needs, which is not limited by the present invention.
T2, manufacturing a mould of the stringer reinforcing structure according to the stringer reinforcing structure and the size designed in the arranging step T1;
t3, layering the web plates of the blades, and pouring and curing;
t4, prefabricating the stringer reinforcing structure in a mould of the stringer reinforcing structure while pouring and curing the web;
t5, bonding the web and the bonding flange of the stringer reinforcing structure through structural adhesive according to the positioning of the stringer reinforcing structure in the web of the blade;
and T6, placing the web plate in the shell for mold closing and molding.
In conclusion, the method for reinforcing the wind power blade by using the stringer reinforcing structure can improve the buckling resistance and the shearing resistance of the blade, does not increase the thickness of the core material of the shell of the blade and the thickness of the web fiber cloth layer, and improves the reliability of the manufacturing quality of the blade.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. The stringer reinforcing structure for the wind power blade is characterized by comprising a middle main structure and connecting structures extending from two side ends of the main structure respectively, wherein the main structure is an arch structure opposite to the connecting structures, the connecting structures of one or more stringer reinforcing structures are connected with a part to be reinforced on the wind power blade, and the part to be reinforced is a part to be reinforced in buckling resistance and/or shearing resistance on the wind power blade.
2. A stringer stiffening structure according to claim 1,
the main structure of the stringer reinforcing structure comprises a core material layer of an intermediate layer and fiber cloth layers on the upper surface and the lower surface of the core material layer, or the main structure of the stringer reinforcing structure comprises fiber cloth layers on the inner side and the outer side;
the fiber cloth layer is unidirectional cloth, biaxial cloth or triaxial cloth.
3. A stringer stiffening structure according to claim 1,
the connection structure of the stringer reinforcing structure is an adhesive flange.
4. A stringer stiffening structure according to claim 1,
the connecting structure comprises a fiber cloth layer, and the fiber cloth layer is unidirectional cloth, biaxial cloth or triaxial cloth.
5. A stringer stiffening structure according to claim 1,
the stringer reinforcing structure is a trapezoidal stringer reinforcing structure, and an angle formed between a main structure of the trapezoidal stringer reinforcing structure and the connecting structure is an obtuse angle, a right angle or an acute angle;
or the stringer reinforcing structure is an omega-shaped stringer reinforcing structure, and a main structure of the omega-shaped stringer reinforcing structure is an arc-shaped or symmetrical curve.
6. The stringer reinforcing structure of any of claims 1 to 5, wherein said component to be reinforced comprises a blade shell and/or a web of a wind turbine blade.
7. A wind turbine blade comprising a blade shell and a web, wherein one or more stringer reinforcing structures according to any one of claims 1 to 6 are provided on the blade shell and/or the web.
8. The wind blade of claim 7,
the stringer reinforcing structures are arranged on the front surface and/or the back surface of the web, the connecting structures of the stringer reinforcing structures are connected with the front surface and/or the back surface of the web, and a certain angle is formed between the length direction of the stringer reinforcing structures and the length direction of the blade;
or the stringer reinforcing structure is arranged on the core material at the front edge position or the rear edge position of the inner side of the blade shell, and a certain angle is formed between the length direction of the stringer reinforcing structure and the length direction of the blade.
9. The wind blade of claim 7,
the stringer reinforcing structure is arranged on the front surface and/or the back surface of the web, and the angle formed between the length direction of the stringer reinforcing structure and the length direction of the blade ranges from 20 degrees to 90 degrees;
or the stringer reinforcing structure is arranged on the core material at the front edge position or the rear edge position of the inner side of the blade shell, and the angle formed between the stringer reinforcing structure and the length direction of the blade is less than 20 degrees.
10. A method of adding stringer stiffening to a blade shell and/or a web according to any of claims 7 to 9, comprising the steps of:
determining the position of a stringer reinforcing structure to be added on the blade shell and/or the web, and the structural form and size of the stringer reinforcing structure to be added;
manufacturing a mould of the stringer reinforcing structure;
carrying out layering and pouring curing on the blade shell and/or the web, and prefabricating a stringer reinforcing structure in a mould of the stringer reinforcing structure;
according to the positioning of the stringer strengthening structures in the blade shell and/or the web, connecting the blade shell and/or the web with the connecting structures of the stringer strengthening structures respectively;
and (3) carrying out die assembly molding on the blade shell or placing the web plate in the blade shell.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195783.9A CN111396244A (en) | 2020-03-19 | 2020-03-19 | Wind power blade and stringer reinforcing structure and method thereof |
| PCT/CN2021/081212 WO2021185263A1 (en) | 2020-03-19 | 2021-03-17 | Wind power blade, stringer reinforcement structure thereof, and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195783.9A CN111396244A (en) | 2020-03-19 | 2020-03-19 | Wind power blade and stringer reinforcing structure and method thereof |
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| CN111396244A true CN111396244A (en) | 2020-07-10 |
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| WO (1) | WO2021185263A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021185263A1 (en) * | 2020-03-19 | 2021-09-23 | 上海电气风电集团股份有限公司 | Wind power blade, stringer reinforcement structure thereof, and method |
| CN113454334A (en) * | 2021-05-12 | 2021-09-28 | 远景能源有限公司 | Fan blade with reinforcing strips and manufacturing method thereof |
| WO2025007614A1 (en) * | 2023-07-04 | 2025-01-09 | 洛阳双瑞风电叶片有限公司 | Conformal reinforcement structure, and wind turbine blade and reinforcement method therefor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114770959B (en) * | 2022-03-28 | 2024-07-12 | 三一重能股份有限公司 | Filling method for trailing edge of wind power blade |
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| CN202545139U (en) * | 2012-04-25 | 2012-11-21 | 国电联合动力技术有限公司 | Deflection-resistant wind turbine wind wheel blade with reinforcing rib structure |
| US20130334735A1 (en) * | 2010-09-30 | 2013-12-19 | Matteo Casazza | Wind turbine blade tubular spar fabricating method |
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| WO2021185263A1 (en) * | 2020-03-19 | 2021-09-23 | 上海电气风电集团股份有限公司 | Wind power blade, stringer reinforcement structure thereof, and method |
| CN113454334A (en) * | 2021-05-12 | 2021-09-28 | 远景能源有限公司 | Fan blade with reinforcing strips and manufacturing method thereof |
| WO2022236724A1 (en) * | 2021-05-12 | 2022-11-17 | 远景能源有限公司 | Fan blade provided with reinforcing strips and manufacturing method therefor |
| WO2025007614A1 (en) * | 2023-07-04 | 2025-01-09 | 洛阳双瑞风电叶片有限公司 | Conformal reinforcement structure, and wind turbine blade and reinforcement method therefor |
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| WO2021185263A1 (en) | 2021-09-23 |
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