CN113002015A - Structure of wind power blade trailing edge core material and preparation method thereof - Google Patents
Structure of wind power blade trailing edge core material and preparation method thereof Download PDFInfo
- Publication number
- CN113002015A CN113002015A CN202110219373.8A CN202110219373A CN113002015A CN 113002015 A CN113002015 A CN 113002015A CN 202110219373 A CN202110219373 A CN 202110219373A CN 113002015 A CN113002015 A CN 113002015A
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- China
- Prior art keywords
- core material
- trailing edge
- blade
- auxiliary beam
- rear edge
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Classifications
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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
- B29C70/36—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 and impregnating by casting, e.g. vacuum casting
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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
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
- B29L2031/085—Wind turbine blades
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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)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (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 structure of a wind power blade trailing edge core material and a preparation method thereof. According to the invention, the lap joint form of the shell core material and the rear edge auxiliary beam is optimized, so that the shell core material and the rear edge auxiliary beam can be tightly attached along with the shape, the structural stability of the rear edge of the blade is improved, and meanwhile, a V-shaped groove does not need to be formed at the lap joint corner position of the shell core material and the rear edge auxiliary beam, the processing difficulty of the core material is greatly reduced, and the production efficiency is improved; in addition, the structure can eliminate a plurality of defects caused by the fact that the shell core material and the trailing edge auxiliary beam cannot be attached closely along with the shape, and the quality of the blade is improved.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a structure of a core material at the rear edge of a wind power blade and a preparation method thereof.
Background
With the increasing exhaustion of petrochemical energy, wind power generation becomes a new favorite of all countries in the world as a low-price, clean and low-carbon power generation mode. The rapid development of the global wind power industry drives the rapid development of wind turbine generators. The blade is one of the key parts of the wind turbine generator, and the performance of the blade directly influences whether the wind turbine generator can stably and normally operate.
In the prior art, in order to ensure that the buckling of the trailing edge meets the design requirement, the trailing edge auxiliary beam 2 of the wind turbine blade part region and the blade shell core material 3 are overlapped by a certain width, as shown in fig. 1. In order to ensure that the trailing edge auxiliary beam 2 is in shape-following lap joint with the blade shell core material 3, a V-shaped groove needs to be processed at the corner 31 of the blade shell core material, so that the core material is difficult to process; and during actual production, the trailing edge auxiliary beam 2, the shell core material 3 and the main beam of the blade have positioning tolerance, so that the shell core material can not be attached to the trailing edge auxiliary beam 2 along with the shape at the corner 31 of the shell core material of the blade, and the shell core material can be suspended. The unsettled space can form rich resin defect, and this unsettled can form uncontrollable resin and fill the runner, produces great influence to the pouring of wind-powered electricity generation blade casing.
Disclosure of Invention
The invention aims to provide a structure of a wind power blade trailing edge core material and a forming method thereof, and aims to solve the problems that in the prior art, the processing difficulty of the wind power blade shell core material corner is high, and the defects caused by the fact that a trailing edge auxiliary beam cannot be tightly attached to the shell core material along with the shape are overcome.
In order to achieve the above object, the present invention provides a structure of a trailing edge core material of a wind turbine blade, the structure comprising:
the rear edge auxiliary beam is provided with a first contact surface;
the blade shell core material is provided with a second contact surface, and the second contact surface is completely and tightly attached to the first contact surface to form a lap joint area; and the number of the first and second groups,
and the blade trailing edge reinforcing core material covers the upper surface of the overlapping area, at least part of the trailing edge auxiliary beam and at least part of the blade shell core material.
Preferably, the blade trailing edge reinforcing core material is provided with inclined planes on two opposite sides.
Further, the transverse cross-sectional shape of the blade trailing edge reinforcing core material is triangular or trapezoidal.
Preferably, the width of the blade trailing edge reinforcing core covering at least part of the trailing edge auxiliary beam is in the range of 10mm-500mm, and/or the width of the blade shell core covering at least part of the blade shell core is in the range of 10mm-500 mm.
Preferably, the blade trailing edge reinforcing core material has a thickness in the range of 5mm to 80 mm.
The preparation method of the structure of the wind power blade trailing edge core material comprises the following steps:
and 3, laying a blade rear edge reinforcing core material on the upper surface of the lapping area of the rear edge auxiliary beam and the blade shell core material to form a wind power blade rear edge core material.
Preferably, the width of the blade trailing edge reinforcing core covering at least part of the trailing edge auxiliary beam is in the range of 10mm-500mm, and/or the width of the blade shell core covering at least part of the blade shell core is in the range of 10mm-500 mm.
Further, the preparation method further comprises the following steps: and 4, heating, curing and molding the structure of the core material at the rear edge of the wind power blade by adopting a vacuum infusion process.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
1. this kind of structure of wind-powered electricity generation blade trailing edge core through optimizing casing core and trailing edge auxiliary girder overlap joint form for casing core and trailing edge auxiliary girder can closely follow the shape laminating, on the one hand, have improved the stability of blade trailing edge structure, can eliminate simultaneously because of can't closely follow a great deal of drawback that the shape laminating brought, improve the blade quality.
2. This kind of structure of wind-powered electricity generation blade trailing edge core need not to open V type groove at blade shell core and trailing edge auxiliary girder overlap joint corner position, greatly reduced the core processing degree of difficulty, easy to carry out, improves production efficiency.
Drawings
FIG. 1 is a schematic structural diagram of a trailing edge core material of a wind turbine blade in the prior art;
FIG. 2 is a schematic structural diagram of a trailing edge core material of a wind turbine blade according to the present invention.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The "transverse direction" as used herein refers to the width direction of the blade, i.e., perpendicular with respect to the length direction of the blade.
As shown in fig. 2, the present invention provides a structure of a trailing edge core material of a wind turbine blade, which includes:
the auxiliary rear edge beam 2 is provided with a first contact surface 21, the first contact surface is an inclined surface in the embodiment, and the auxiliary rear edge beam 2 can be a curved surface in other embodiments;
the thickness of the blade shell core material 3 is equal to that of the trailing edge auxiliary beam 2, the blade shell core material 3 is provided with a second contact surface 31 (an inclined surface in this case), the second contact surface 31 and the first contact surface 21 are completely and tightly attached to form an overlap joint area, namely, chamfers at the overlap joint are completely attached to form a chamfer overlap joint structure with a flat and tight upper surface, the problem that the shell core material is suspended due to the fact that the blade shell core material 3 and the trailing edge auxiliary beam 2 cannot be attached to each other along with the shape is solved, and the subsequent pouring quality is improved; and the number of the first and second groups,
and the blade trailing edge reinforcing core material 4 covers the upper surface of the overlapping area, at least part of the trailing edge auxiliary beam 2 and at least part of the blade shell core material 3, so that the structure is further stable and firm.
The two opposite sides of the blade trailing edge reinforcing core material 4 are provided with inclined planes, one side is the side where the blade trailing edge reinforcing core material 4 is in lap joint with the trailing edge auxiliary beam 2, and the other side is the side where the blade trailing edge reinforcing core material 4 is in lap joint with the blade shell core material 3.
The transverse cross section of the blade trailing edge reinforced core material 4 is triangular or trapezoidal.
The width range of the blade trailing edge reinforcing core material covering at least part of the trailing edge auxiliary beam is 10mm-500mm, and/or the width range of the blade shell core material covering at least part of the blade shell is 10mm-500 mm.
Meanwhile, the invention also provides a preparation method of the structure of the wind power blade trailing edge core material, which is described by the specific embodiment with reference to the attached drawing 2:
1. drawing positioning points of a first layer of fiber cloth of the rear edge auxiliary beam 2 on the surface of the shell mold 1 by using a water-based marker pen, and sequentially laying the fiber layers of the rear edge auxiliary beam 2 in a staggered manner to finally form a rear edge auxiliary beam 2 structure with a first contact surface 21;
2. overlapping and laying the blade shell core material 3 at the first contact surface 21 of the trailing edge auxiliary beam 2, and completely attaching the contact surfaces of the overlapping area;
3. covering and laying a blade trailing edge reinforcing core material 4 on the upper surface of a lapping area of the trailing edge auxiliary beam 2 and the blade shell core material 3, wherein the width range of the blade trailing edge reinforcing core material 4 covering the trailing edge auxiliary beam 2 is 10-500 mm, and the width range of the blade shell core material 3 covering is 10-500 mm, so that a structure of the wind power blade trailing edge core material is formed;
4. pouring the pouring resin into the product area containing the structure by adopting a vacuum pouring process, and heating to solidify and form the product area.
In conclusion, the structure of the wind power blade trailing edge core material provided by the invention optimizes the lap joint form of the shell core material and the trailing edge auxiliary beam, so that the shell core material and the trailing edge auxiliary beam can be tightly attached along with the shape, on one hand, the structural stability of the blade trailing edge is improved, and simultaneously, various defects caused by the fact that the shell core material and the trailing edge auxiliary beam cannot be tightly attached along with the shape, such as a resin-rich defect formed by a suspension phenomenon of the shell core material, can be eliminated, and the blade quality is improved; on the other hand, V-shaped grooves do not need to be formed in the lap joint corner positions of the blade shell core material and the trailing edge auxiliary beam, the core material processing difficulty is greatly reduced, the operation is simple and convenient, the implementation is easy, and the production efficiency is improved.
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 (8)
1. A structure of a wind turbine blade trailing edge core material, characterized in that the structure comprises:
the rear edge auxiliary beam is provided with a first contact surface;
the blade shell core material is provided with a second contact surface, and the second contact surface is completely and tightly attached to the first contact surface to form a lap joint area; and
and the blade trailing edge reinforcing core material covers the upper surface of the overlapping area, at least part of the trailing edge auxiliary beam and at least part of the blade shell core material.
2. The wind turbine blade trailing edge core structure as claimed in claim 1, wherein the blade trailing edge reinforcing core has chamfers on opposite sides.
3. The structure of the wind power blade trailing edge core material as claimed in claim 2, wherein the blade trailing edge reinforcing core material has a triangular or trapezoidal transverse cross-sectional shape.
4. The structure of a wind turbine blade trailing edge core material according to claim 1, wherein the blade trailing edge reinforcing core material covers at least part of the trailing edge auxiliary beam with a width in the range of 10mm to 500mm and/or covers at least part of the blade shell core material with a width in the range of 10mm to 500 mm.
5. The wind turbine blade trailing edge core structure as claimed in claim 1, wherein the blade trailing edge reinforcing core has a thickness in the range of 5mm to 80 mm.
6. A method for preparing a structure of a wind turbine blade trailing edge core material as claimed in any one of claims 1 to 5, comprising the steps of:
step 1, sequentially laying fiber layers of a rear edge auxiliary beam on a blade shell mold to form a rear edge auxiliary beam structure with a first contact surface;
step 2, overlapping and laying the core material of the blade shell on the first contact surface side of the auxiliary beam at the rear edge, wherein the overlapping surfaces of the core material and the blade shell are completely and tightly attached;
and 3, laying a blade rear edge reinforcing core material on the upper surface of the lapping area of the rear edge auxiliary beam and the blade shell core material to form a wind power blade rear edge core material.
7. The method for preparing the structure of the wind power blade trailing edge core material as claimed in claim 6, wherein in the step 3, the width of the blade trailing edge reinforcing core material covering at least part of the trailing edge auxiliary beam is 10mm-500mm, and/or the width of the blade shell core material covering at least part of the blade shell is 10mm-500 mm.
8. The method of claim 6, further comprising: and 4, heating, curing and molding the structure of the core material at the rear edge of the wind power blade by adopting a vacuum infusion process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110219373.8A CN113002015A (en) | 2021-02-26 | 2021-02-26 | Structure of wind power blade trailing edge core material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110219373.8A CN113002015A (en) | 2021-02-26 | 2021-02-26 | Structure of wind power blade trailing edge core material and preparation method thereof |
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| CN113002015A true CN113002015A (en) | 2021-06-22 |
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| CN202110219373.8A Pending CN113002015A (en) | 2021-02-26 | 2021-02-26 | Structure of wind power blade trailing edge core material and preparation method thereof |
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Application publication date: 20210622 |
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