CN113738572A - Novel wind-powered electricity generation blade girder, wind-powered electricity generation blade - Google Patents
Novel wind-powered electricity generation blade girder, wind-powered electricity generation blade Download PDFInfo
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- CN113738572A CN113738572A CN202111193847.2A CN202111193847A CN113738572A CN 113738572 A CN113738572 A CN 113738572A CN 202111193847 A CN202111193847 A CN 202111193847A CN 113738572 A CN113738572 A CN 113738572A
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- 230000005611 electricity Effects 0.000 title claims description 6
- 239000003365 glass fiber Substances 0.000 claims abstract description 117
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 72
- 239000004917 carbon fiber Substances 0.000 claims abstract description 72
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 68
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 40
- 239000011162 core material Substances 0.000 claims abstract description 19
- 239000011521 glass Substances 0.000 claims description 9
- 239000004744 fabric Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010412 perfusion Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- 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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- 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
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention particularly discloses a novel wind power blade main beam and a wind power blade, wherein the wind power blade main beam comprises a main beam pultrusion plate and a core material, and the main beam pultrusion plate and the core material are connected into a whole; the girder pultrusion plate is formed by overlapping a plurality of layers of carbon glass fiber mixed pultrusion plates or overlapping a plurality of layers of carbon fiber pultrusion plates, glass fiber pultrusion plates and carbon glass fiber mixed pultrusion plates; the wind power blade comprises a web plate, an upper blade shell, a lower blade shell and an electric blade main beam. The electric blade girder is made of the carbon-glass fiber mixed pultrusion plate or the carbon fiber pultrusion plate, the glass fiber pultrusion plate and the carbon-glass fiber mixed pultrusion plate, and has the advantages of light weight, low cost, higher modulus, rigidity and strength; the carbon-glass fiber mixed pultrusion plate can effectively solve the problem of stress concentration caused by modulus difference between the carbon fiber pultrusion plate and the glass fiber pultrusion plate; the two ends of the girder pultrusion plate are provided with girder pultrusion plate chamfers and the chamfers are laid, so that the problem of stress concentration of the two sides and the end face of the pultrusion plate is solved.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to a novel wind power blade main beam and a wind power blade.
Background
With the development of offshore wind resources and the development of onshore ultra-low wind resources, the development trend of wind power blades is a large-scale trend. The larger the wind turbine blade, the more material and the heavier the wind turbine blade, which may cause heavy load and may result in high unit cost. Lightweight, high strength and low cost have become the direction of wind turbine blade development. The wind power blade main beam is a main bearing structure and bears most of bending load of the wind power blade, and the structural form of the wind power blade main beam needs to meet the requirements of strength and rigidity.
At present, a wind power blade main beam has the following defects: glass fiber or carbon fiber is used, and a layering pouring process is adopted for manufacturing, so that the blade of the main beam is heavy, the blade load is large, the efficiency is low, and the cost is high; the carbon fiber pultrusion plate is independently used for manufacturing, so that the cost is too high; the glass fiber pultrusion plate is independently used for manufacturing, and the condition of insufficient modulus and strength can occur along with the increasing length of the wind power blade; the main beam made of the pultruded plate has stress concentration at the ending and transition positions, and the stacking interface performance of the pultruded plate is insufficient.
Disclosure of Invention
The invention aims to provide a novel wind power blade main beam and a wind power blade, wherein the electric blade main beam is made of a carbon fiber pultrusion plate, a glass fiber pultrusion plate and a carbon glass fiber mixed pultrusion plate, and has the advantages of light weight, low cost, higher modulus, rigidity and strength.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a novel wind power blade main beam comprises a main beam pultrusion plate and a core material, wherein the main beam pultrusion plate and the core material are connected into a whole; the main beam pultrusion plate is formed by overlapping and pouring a plurality of layers of carbon glass fiber mixed pultrusion plates or a plurality of layers of carbon fiber pultrusion plates, glass fiber pultrusion plates and carbon glass fiber mixed pultrusion plates;
the carbon fiber pultrusion plate, the glass fiber pultrusion plate and the carbon glass fiber mixed pultrusion plate are stacked in a mode that the carbon fiber pultrusion plate is arranged on the outer side of the wind power blade main beam, the glass fiber pultrusion plate is arranged on the inner side of the wind power blade main beam, the carbon glass fiber mixed pultrusion plate is arranged in the middle of the wind power blade main beam or the carbon fiber pultrusion plate is arranged on the inner side of the wind power blade main beam, the glass fiber pultrusion plate is arranged on the outer side of the wind power blade main beam, and the carbon glass fiber mixed pultrusion plate is arranged in the middle of the wind power blade main beam; wherein a carbon fiber felt is arranged between every two layers of carbon fiber pultrusion plates, a glass fiber felt is arranged between the glass fiber pultrusion plates, and the glass fiber felt and the carbon fiber felt are all larger than the carbon fiber pultrusion plates, the glass fiber pultrusion plates and the carbon fiber glass mixed pultrusion plates.
Further, the superposition mode of the carbon glass fiber mixed pultrusion plate is that the carbon fiber surface and the carbon fiber surface are superposed, the glass fiber surface and the glass fiber surface are superposed, a carbon fiber felt is arranged between the carbon fiber surface and the carbon fiber surface, a glass fiber felt is arranged between the glass fiber surface and the glass fiber surface, and the carbon fiber felt and the glass fiber felt are both larger than the carbon glass fiber mixed pultrusion plate.
Further, the fine pultrusion board one side of carbon glass is fine for carbon, and the one side is fine for glass, the carbon fine accounts for the fine 1/4 of pultrusion board gross thickness that mixes of carbon glass, the fine limit of pultrusion board that mixes of carbon glass is the fillet.
Furthermore, main beam pultrusion plate chamfers are arranged at two ends of the main beam pultrusion plate, and a core material chamfer consistent with the main beam pultrusion plate chamfer is arranged at one end of the core material and is connected with the main beam pultrusion plate to form a whole; and a chamfer laying layer is arranged at the joint of the main beam pultrusion plate and the core material.
Furthermore, the chamfer angle of the main beam pultrusion plate is 1:100 in the thickness direction of the initial position and the final position of the main beam pultrusion plate.
Further, the chamfer layering exceeds the ending position and the starting position of the chamfer of the girder pultrusion plate by more than 300 mm; the chamfer laying layer is made of glass fiber cloth.
The invention also provides a novel wind power blade, which comprises a web plate, an upper blade shell, a lower blade shell and the wind power blade main beam, wherein the number of the wind power blade main beams is two, one of the wind power blade main beams is in perfusion connection with the upper blade shell, and the other wind power blade main beam is in perfusion connection with the lower blade shell; the two webs are arranged between the two wind power blade main beams, and the blade upper shell, the blade lower shell and the wind power blade main beams are fixedly connected into a whole.
The beneficial effects of this technical scheme lie in:
1. the wind power blade main beam is made of the carbon-glass fiber mixed pultrusion plate or the carbon fiber pultrusion plate, the glass fiber pultrusion plate and the carbon-glass fiber mixed pultrusion plate, and has the advantages of good mechanical property, higher fiber content, higher modulus and strength. The wind power blade main beam can bear the action of large blade flapping bending moment, and the strength characteristic of the wind power blade main beam is ensured; meanwhile, the rigidity characteristic of the large blade in the flapping direction is ensured, and the blade tip disturbance degree is prevented from being too large and interfering with a tower.
2. The density of the carbon fiber pultrusion plate is about 30% less than that of the glass fiber pultrusion plate, the strength of the carbon fiber pultrusion plate is 40% greater than that of the glass fiber pultrusion plate, and the modulus of the carbon fiber pultrusion plate is 3-8 times higher than that of the glass fiber pultrusion plate. The wind power blade main beam can play the advantages of high elasticity and light weight of large blades, and by taking 80m wind power blades as an example, the weight of the wind power blade main beam can be reduced by 12.06%, and the total cost can be reduced by 10.47%.
3. The invention adopts the carbon-glass fiber mixed pultrusion plate, can effectively solve the problem of stress concentration caused by modulus difference between the carbon fiber pultrusion plate and the glass fiber pultrusion plate, thereby optimizing the interface performance.
4. According to the invention, the main beam pultrusion plate chamfers are arranged at the two ends of the main beam pultrusion plate, and the chamfer layering is laid, so that the problem of stress concentration at the two sides and the end face of the pultrusion plate is solved.
5. The production process of the wind power blade main beam can realize automatic control, and has high material utilization rate, low cost and high efficiency.
6. The main beam of the wind power blade has good quality stability, can endure a harsher high-temperature working environment, and has high reliability.
7. The wind power blade main beam is standardized and modularized in design, and is more flexible and convenient in design.
8. The main beam is made of a carbon-glass fiber mixed pultrusion plate or a carbon fiber pultrusion plate, a glass fiber pultrusion plate and a carbon-glass fiber mixed pultrusion plate, and a carbon fiber felt or a glass fiber felt is arranged between the pultrusion plate and the pultrusion plate, so that the hard contact between the pultrusion plate and the pultrusion plate can be changed into the soft contact, and the bonding property of the interface between the pultrusion plates is improved.
Drawings
FIG. 1 is a schematic structural view of a novel wind turbine blade main beam according to the present invention;
FIG. 2 is a schematic structural view of a main beam pultruded panel according to the present invention; a is formed by superposing a carbon fiber pultrusion plate, a glass fiber pultrusion plate and a carbon glass fiber mixed pultrusion plate, wherein the carbon fiber pultrusion plate is arranged on the outer side, the glass fiber pultrusion plate is arranged on the inner side, and the carbon glass fiber mixed pultrusion plate is arranged in the middle; b is formed by superposing a carbon fiber pultrusion plate, a glass fiber pultrusion plate and a carbon glass fiber mixed pultrusion plate, wherein the carbon fiber pultrusion plate is arranged on the inner side, the glass fiber pultrusion plate is arranged on the outer side, and the carbon glass fiber mixed pultrusion plate is arranged in the middle; c is formed by overlapping carbon glass fiber mixed pulling and extruding plates;
FIG. 3 is a schematic structural view of the carbon glass fiber mixed pultruded panel of the present invention;
FIG. 4 is a schematic structural diagram of a wind turbine blade according to the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: 1. a main beam pultrusion plate; 2. a core material; 3. carbon fiber pultrusion plates; 4. glass fiber pultrusion plates; 5. a carbon-glass fiber mixed pultrusion plate; 51. carbon fiber; 52. glass fiber; 6. a carbon fiber felt; 7. a glass fiber felt; 8. chamfering the main beam pultrusion plate; 9. chamfering and layering; 10. a web; 11. a blade upper shell; 12. a blade lower shell.
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 figures 1 to 3: a novel wind power blade main beam comprises a main beam pultrusion plate 1 and a core material 2, wherein the main beam pultrusion plate 1 and the core material 2 are connected into a whole; the girder pultrusion plate 1 is formed by overlapping and pouring a plurality of layers of carbon glass fiber pultrusion plates 5 or a plurality of layers of carbon fiber pultrusion plates 3, glass fiber pultrusion plates 4 and carbon glass fiber pultrusion plates 5.
As shown in fig. 2, the carbon fiber pultrusion plate 3, the glass fiber pultrusion plate 4 and the carbon glass fiber pultrusion plate 5 are stacked in such a manner that the carbon fiber pultrusion plate 3 is arranged at the outer side of the wind power blade main beam, the glass fiber pultrusion plate 4 is arranged at the inner side of the wind power blade main beam, the carbon glass fiber pultrusion plate 5 is arranged in the middle of the wind power blade main beam or the carbon fiber pultrusion plate 3 is arranged at the inner side of the wind power blade main beam, the glass fiber pultrusion plate 4 is arranged at the outer side of the wind power blade main beam, and the carbon glass fiber pultrusion plate 5 is arranged in the middle of the wind power blade main beam; wherein a carbon fiber felt 6 is arranged between each layer of carbon fiber pultrusion 3, a glass fiber felt 7 is arranged between the glass fiber pultrusion plates 4, and the glass fiber felt 7 and the carbon fiber felt 6 are all larger than the carbon fiber pultrusion plates 3, the glass fiber pultrusion plates 4 and the carbon glass fiber pultrusion plates 5. The carbon glass fiber mixed pultrusion plate 5 is characterized in that the carbon fiber surface and the carbon fiber surface are overlapped, the glass fiber surface and the glass fiber surface are overlapped, a carbon fiber felt 6 is arranged between the carbon fiber surface and the carbon fiber surface, a glass fiber felt 7 is arranged between the glass fiber surface and the glass fiber surface, and the carbon fiber felt 6 and the glass fiber felt 7 are both larger than the carbon glass fiber mixed pultrusion plate 5. The glass fiber felt 7 and the carbon fiber felt 6 are all larger than the carbon fiber pultrusion plate 3, the glass fiber pultrusion plate 4 and the carbon glass fiber mixed pultrusion plate 5, and resin enrichment is prevented from being formed on two sides of the pultrusion plates.
As shown in fig. 3, one surface of the carbon-glass fiber mixed extruded plate 5 is carbon fiber 51, the other surface thereof is glass fiber 52, and the edge of the carbon-glass fiber mixed extruded plate 5 is a rounded corner. The manufacturing method of the carbon-glass fiber mixed pultrusion plate 5 comprises the steps of enabling resin-impregnated glass fibers and resin-impregnated carbon fibers to pass through a shape die under the action of traction force, and directly pultrusion the carbon-glass fiber mixed pultrusion plate through curing equipment, wherein the mixing ratio and the thickness of the carbon fibers and the glass fibers are calculated and tested according to strength and modulus to obtain a balance value, generally speaking, the thickness of the carbon fibers is thinner than that of the glass fibers, so that excellent comprehensive mechanical properties are obtained, and the carbon fibers preferably account for 1/4 of the total thickness of the carbon-glass fiber mixed pultrusion plate 5.
The two ends of the girder pultrusion plate 1 are provided with girder pultrusion plate chamfers 8, one end of the core material 2 is provided with a core material chamfer consistent with the girder pultrusion plate chamfer 8, and the core material chamfer and the girder pultrusion plate 1 are connected into a whole; the chamfer layering 9 is arranged at the joint of the main beam pultrusion plate 1 and the core material 2, so that the bonding performance is improved, and the stress concentration can be prevented. Preferably, the chamfer angle 8 of the main beam pultrusion plate is 1:100 in the thickness direction at the initial position and the end position of the main beam pultrusion plate 1. The chamfer layering 9 covers the inclined plane of the main beam pultrusion plate chamfer 8 and extends towards the starting direction and the ending direction, and exceeds the ending position and the starting position of the main beam pultrusion plate chamfer 8 by more than 300 mm; the chamfer laying layer 9 is glass fiber cloth.
As shown in fig. 4, the novel wind power blade comprises a web 10, an upper blade shell 11, a lower blade shell 12 and the wind power blade main beam, wherein the wind power blade main beam is provided with two pieces, one piece is connected with the upper blade shell 11 in a pouring manner, and the other piece is connected with the lower blade shell 12 in a pouring manner; the two webs 10 are arranged between the two wind power blade main beams, and the blade upper shell 11, the blade lower shell 12 and the wind power blade main beams are fixedly connected into a whole.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. The utility model provides a novel wind-powered electricity generation blade girder which characterized in that: the main beam pultrusion plate is connected with the core material into a whole; the main beam pultrusion plate is formed by overlapping and pouring a plurality of layers of carbon glass fiber mixed pultrusion plates or a plurality of layers of carbon fiber pultrusion plates, glass fiber pultrusion plates and carbon glass fiber mixed pultrusion plates;
the carbon fiber pultrusion plate, the glass fiber pultrusion plate and the carbon glass fiber mixed pultrusion plate are stacked in a mode that the carbon fiber pultrusion plate is arranged on the outer side of the wind power blade main beam, the glass fiber pultrusion plate is arranged on the inner side of the wind power blade main beam, the carbon glass fiber mixed pultrusion plate is arranged in the middle of the wind power blade main beam or the carbon fiber pultrusion plate is arranged on the inner side of the wind power blade main beam, the glass fiber pultrusion plate is arranged on the outer side of the wind power blade main beam, and the carbon glass fiber mixed pultrusion plate is arranged in the middle of the wind power blade main beam; wherein a carbon fiber felt is arranged between every two layers of carbon fiber pultrusion plates, a glass fiber felt is arranged between the glass fiber pultrusion plates, and the glass fiber felt and the carbon fiber felt are all larger than the carbon fiber pultrusion plates, the glass fiber pultrusion plates and the carbon fiber glass mixed pultrusion plates.
2. The novel wind power blade main beam of claim 1, characterized in that: the superposition mode of the carbon glass fiber mixed pultrusion plate is that the carbon fiber surface and the carbon fiber surface are superposed, the glass fiber surface and the glass fiber surface are superposed, a carbon fiber felt is arranged between the carbon fiber surface and the carbon fiber surface, a glass fiber felt is arranged between the glass fiber surface and the glass fiber surface, and the carbon fiber felt and the glass fiber felt are both larger than the carbon glass fiber mixed pultrusion plate.
3. The novel wind power blade main beam of claim 1 or 2, characterized in that: the fine pultrusion board one side of carbon glass is fine, and the one side is fine, the carbon fiber accounts for the fine 1/4 of pultrusion board gross thickness that mixes of carbon glass, the fine limit of pultrusion board that mixes of carbon glass is the fillet.
4. The novel wind power blade main beam of claim 1, characterized in that: the two ends of the main beam pultrusion plate are provided with main beam pultrusion plate chamfers, one end of the core material is provided with a core material chamfer consistent with the main beam pultrusion plate chamfer, and the core material chamfer and the main beam pultrusion plate are connected into a whole; and a chamfer laying layer is arranged at the joint of the main beam pultrusion plate and the core material.
5. The novel wind power blade main beam of claim 4, wherein: the chamfer angle of the main beam pultrusion plate is 1:100 in the thickness direction of the initial position and the final position of the main beam pultrusion plate.
6. The novel wind power blade main beam of claim 4, wherein: the chamfer layering exceeds the ending position and the starting position of the chamfer of the girder pultrusion plate by more than 300 mm; the chamfer laying layer is made of glass fiber cloth.
7. A wind-powered electricity generation blade which characterized in that: the wind power blade main beam comprises a web plate, an upper blade shell, a lower blade shell and the wind power blade main beam as claimed in any one of claims 1 to 6, wherein the wind power blade main beam is provided with two pieces, one piece is connected with the upper blade shell in a pouring manner, and the other piece is connected with the lower blade shell in a pouring manner; the two webs are arranged between the two wind power blade main beams, and the blade upper shell, the blade lower shell and the wind power blade main beams are fixedly connected into a whole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111193847.2A CN113738572B (en) | 2021-10-13 | 2021-10-13 | Wind-powered electricity generation blade girder, wind-powered electricity generation blade |
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| CN202111193847.2A CN113738572B (en) | 2021-10-13 | 2021-10-13 | Wind-powered electricity generation blade girder, wind-powered electricity generation blade |
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| CN113738572A true CN113738572A (en) | 2021-12-03 |
| CN113738572B CN113738572B (en) | 2023-08-08 |
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