CN116624323A - Torsional wind power generation blade - Google Patents
Torsional wind power generation blade Download PDFInfo
- Publication number
- CN116624323A CN116624323A CN202310668173.XA CN202310668173A CN116624323A CN 116624323 A CN116624323 A CN 116624323A CN 202310668173 A CN202310668173 A CN 202310668173A CN 116624323 A CN116624323 A CN 116624323A
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- CN
- China
- Prior art keywords
- blade
- blade body
- torsion
- section
- blades
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010248 power generation Methods 0.000 title claims abstract description 13
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 238000005452 bending Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- F05B2240/301—Cross-section characteristics
-
- 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
- F05B2240/302—Segmented or sectional blades
-
- 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
- F05B2240/307—Blade tip, e.g. winglets
-
- 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
Landscapes
- 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
A torsion wind power generation blade comprises a blade body composed of a plurality of sections of blades; the torsion angle of each section of blade that blade body set up along tip portion to root portion increases gradually, the whole cross-section of blade body forms the echelonment through the torsion angle of equidimension not. According to the invention, on one hand, the blade body is designed in a segmented manner, the torsion angle of each blade section is gradually increased along the blade tip to the blade root, and the torsion angle can be in a line with the combined speed direction of the blade tip, so that each blade section is in the best performance, the wind capturing efficiency of the whole blade body is greatly improved, the output is obvious, and the bending and torsion resistance of the blade body is also improved; on the other hand, the blades of the blade body except the blade tip part are connected in a staggered torsion way, so that discontinuous torsion angles are formed, the design is simple, and compared with the continuous torsion angle process, the process is greatly simplified, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a torsion type wind power generation blade.
Background
The fan blade is the most basic and key component in the wind driven generator, and in the design process, whether the structure of the blade can improve the wind capturing capability, promote the rotation of the fan, prevent turbulent flow and the like needs to be considered. The conventional fan blade is generally designed into a streamline structure, and the cross section size gradually decreases along the blade root to the blade tip, and is similar to the shape of a wing, so that the blade has good aerodynamic performance. In order to improve wind-capturing capability, the conventional fan blade is usually provided with torsion angles, namely the torsion angles of all positions of the fan blade are continuous and not broken, even if the blade is designed into an optimal blade, the output is different, because the directions of linear speeds born by different positions of the blade are different from the directions of wind power, the directions of resultant forces born by the different positions of the blade are different, and the torsion angle design still cannot ensure that the directions of the resultant speeds of all positions of the blade are in a line, particularly the directions of the resultant speeds of the blade root and the blade tip are not in a line. In addition, the continuous torsion angle design has the defects of high difficulty, complex process and high cost.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the torsion type wind power generation blade which is simple in process, high in integral wind capturing efficiency and remarkable in output.
The technical scheme of the invention is as follows: a torsion wind power generation blade comprises a blade body composed of a plurality of sections of blades; the torsion angle of each section of blade that blade body set up along tip portion to root portion increases gradually, the whole cross-section of blade body forms the echelonment through the torsion angle of equidimension not.
Further, the torsion angle of the blade tip of the blade body is zero, and the torsion angles of the blades of each section sequentially increase from the blade tip to the blade root.
Further, each section of blade except the blade tip part of the blade body is subjected to dislocation torsion to form discontinuous torsion angles.
Further, the blades of each segment are twisted in the same direction along the central axis in the length direction, and a torsion angle is generated.
Further, the cross-sectional shape of the blade body gradually increases from the tip portion to the root portion.
Further, the cross section shape of the blade body is gradually changed, and sawteeth or saw-like shapes are formed on two sides of the blade body.
Further, the blade body is divided into a plurality of sections of blades along the length direction, each section of blade comprises a skin and a framework for supporting the skin, and the framework is matched with the shape of the skin; and welding, riveting or screwing the blades of each section.
Further, the inner cavity of the blade body is connected with a blade stem, and the blade stem extends out along the blade root side of the blade body and is connected with the hub.
Further, the framework comprises a plurality of annular plates in a curved surface shape, the annular plates are connected into a whole in series through I-steel, and a reinforcing structure is arranged in the inner cavity of the framework.
Further, the skin is made of aluminum alloy materials.
The invention has the beneficial effects that:
according to the invention, on one hand, the blade body is designed in a segmented manner, the torsion angle of each blade section is gradually increased along the blade tip to the blade root, and the torsion angle can be in a line with the combined speed direction of the blade tip, so that each blade section is in the best performance, the wind capturing efficiency of the whole blade body is greatly improved, the output is obvious, and the bending and torsion resistance of the blade body is also improved; on the other hand, the blades of the blade body except the blade tip part are connected in a staggered torsion way, so that discontinuous torsion angles are formed, the design is simple, and compared with the continuous torsion angle process, the process is greatly simplified, and the cost is reduced.
According to the invention, the blade body is designed into a cross section gradual change structure, so that the blade body can be optimally optimized, the blade body is ensured to have good pneumatic performance, each section of blade is provided with the annular plate and the I-shaped connecting piece, the annular plate adopts flat plate direct laser blanking, the cross section shapes of different positions of each section of blade can be ensured to be completely the same, the manufacturing precision is greatly improved, and the stress uniformity of each section is ensured; and the connecting strength is improved through the I-shaped connecting piece, and the connecting piece is convenient to connect with the skin.
Drawings
FIG. 1 is a schematic view of a blade body according to an embodiment of the present invention;
FIG. 2 is a schematic view of a blade body with a stem portion attached thereto according to an embodiment of the present invention;
FIG. 3 is a schematic view of a section of a blade according to an embodiment of the present invention;
FIG. 4 is a schematic view of the skeleton structure of the interior of the blade of the embodiment of FIG. 3;
fig. 5 is an enlarged schematic view of a part of the structure of the embodiment shown in fig. 1.
The attached drawings are used for identifying and describing:
1. a blade body; 2. a blade; 3. leaf stem; 11. leaf tips; 12. leaf root; 21. a skin; 22. a skeleton; 23. she Hangjia; 221. an annular plate; 222. i-shaped connecting piece.
Description of the embodiments
The invention will be described in further detail with reference to the drawings and the specific examples.
As shown in fig. 1 to 5: a torsion wind power generation blade comprises a blade body 1 composed of a plurality of sections of blades 2; each section of blade 2 is of a torsion structure and has a torsion angle, and the torsion angle of each section of blade arranged from the blade tip 11 to the blade root 12 of the blade body 1 is gradually increased, so that the whole section of the blade body 1 is stepped.
The scheme has the following advantages: the existing blades are all provided with torsion angles to ensure that the windward area of the blade has the optimal attack angle, however, the existing blades form the torsion angles by changing the sectional shape of the surface of the blade, and the torsion angles formed by the structure are continuous; the invention divides the blade body into a plurality of sections of blades, and the adjacent sections of blades are twisted in a staggered way, so that an included angle is formed between the adjacent blades, thereby different torsion angles are arranged to form a step shape, and therefore, the torsion angles are broken and discontinuous; compared with a continuous torsion angle, the wind capturing efficiency of the wind turbine blade is greatly improved, and the wind capturing efficiency of each position of the wind turbine blade is higher, so that the wind power output is improved; on the other hand, the bending and twisting resistance of the blade body can be improved. Because even if each segment of blade is designed as an optimal blade, the forces are different, and because the directions of the linear speeds and the directions of the wind forces are different at different positions of the blade, the directions of the resultant forces are different. For example, after a plurality of blade bodies are installed to form a wind wheel, the wind wheel rotates according to a target direction, in the rotating process, if the blade bodies are not designed into the torsion angle structure, if the wind speed is 10m/s, and the linear speed at the blade root of the blade body is 10m/s, then the linear speed at the blade tip of the blade body may reach 60m/s, and thus the combined speed direction at the blade root and the combined speed direction at the blade tip are not on the same line, therefore, the torsion angle of each section of blade must be ensured to be changed, the wind capturing efficiency of each position of the blade body can be ensured, and the existing continuous torsion angle cannot reach the technical effect of the invention.
In the present embodiment, the twist angle of each segment of the blade 11 is designed differently, and the twist angle of each segment of the blade provided along the blade body 1 from the tip portion 11 to the root portion 12 is gradually increased. Specifically, the torsion angle of the blade tip 11 is designed to be 0, that is, the blade of the blade tip 11 is horizontally arranged, no torsion angle is generated, then the torsion angle is generated by the second blade arranged by the blade tip 11, and so on, the torsion angle of the third blade is larger than that of the second blade, and the torsion angle of the blade at the blade root 12 is the largest, so that a broken discontinuous torsion angle is formed. The blade tip is arranged in such a way that the linear speed of the blade tip is higher than that of other positions of the blade body, the linear speed of the blade root is lower, the torsion angles of the blades of other sections except the blade tip are sequentially increased, and the combined speed direction of each section of blade and the combined speed direction of the blade tip can be kept on the same line or are close to the same line, so that the wind capturing efficiency of the whole blade body is improved, and the output is remarkable.
In this embodiment, each segment of the blade 2 is twisted in the same direction along the central axis in the longitudinal direction, and a twist angle is generated. The torsion angle of each section of blade is only required to be in a line or be close to a line with the combined speed direction at the blade tip.
In this embodiment, the blade body 1 is divided into a plurality of segments 2, typically 3-10 segments, along the length direction, and can be designed according to the size of the blade. Each section of blade 2 is designed into a uniform cross-section structure, and the sections of the blade from the blade root 12 to the blade tip 11 are gradually changed in cross section, namely, the cross section of the blade body 1 is gradually reduced from the blade root to the blade tip, and the two sides of the blade form a saw tooth shape. Preferably, the cross section of each section of blade 2 is in the shape of a water drop, and the upper and lower curved surfaces are symmetrically arranged. Each segment of blade 2 comprises a skin 21 and a skeleton 22, and a reinforcing structure can be arranged in the skeleton 22. The skeleton 22 includes a plurality of annular plates 221 in a droplet shape and a plurality of I-shaped connectors 222 for connecting the annular plates in series into a whole, and the annular plates 221 are of identical structures formed by flat direct laser blanking, and when the I-shaped connectors 222 connect the annular plates 221 in series into a whole, the annular plates are connected with the skin 21, so that the shapes of the sections of the blades are kept consistent, and the manufacturing precision is greatly improved. And the I-shaped connecting piece 222 is used as a stress piece, so that the strength of the framework can be greatly improved. In this embodiment, the cross section of the annular plate 221 is also i-shaped, and just the edge thereof can be connected with the edge of the i-shaped connector 222, so as to increase the contact area and the connection strength. The skin 21 and the I-shaped connecting piece 222 are riveted, so that the skin is convenient to detach and recycle, the mounting process is simple, and the assembling speed is high.
In this embodiment, the inner cavity of the blade body 1 is connected with a stem 3, the stem 3 is connected with a skeleton 22, and the stem 3 extends along the root side of the blade body 1 and is connected with a hub. The leaf stem 3 is a truss structure.
In this embodiment, the skin 21 is made of aluminum alloy, preferably aviation aluminum alloy, and has strength and life comparable to those of aircraft, and is durable for 60 years, and the return on investment can be up to 13 times, which is more economical than any fossil energy (traditional fan blades are made of resin glass fiber or carbon fiber, have life of up to 20 years, and become toxic garbage after being discarded, which is a worldwide problem). In addition, because of adopting aviation aluminum alloy, the strength is high and the weight is light, the blade tip part with the highest wind capturing effect can be widened, and the blade is 5-7 times wider than the traditional blade, and the annual power generation hour is prolonged in a doubling manner; and the rotation speed of the wind wheel is 1/3 lower than that of the traditional wind power, and the noise is 5-8 times lower. And the skin adopts aluminum alloy material, combines with the structure of skeleton, when guaranteeing intensity, can also improve the lightweight greatly.
In the embodiment, the blades 2 are connected through a framework 22; or by a reinforcing structure within the framework 22. For example, she Hangjia is arranged in the framework, and the frameworks of the adjacent sections of blades are connected through She Hangjia to form a torsion angle.
In summary, according to the invention, the blade body is designed in a segmented manner, the torsion angle of each segment of blade is gradually increased along the blade tip to the blade root, and the torsion angle and the combined speed direction at the blade tip can be in a line, so that each segment of blade is in the best performance, the wind capturing efficiency of the whole blade body is greatly improved, the output is obvious, and the bending and torsion resistance of the blade body is also improved; on the other hand, the blades of the blade body except the blade tip part are connected in a staggered torsion mode, so that discontinuous torsion angles are formed, the design is simple, and compared with a continuous torsion angle process, the process is greatly simplified, and the cost is reduced.
In addition, the blade body is designed into a cross section gradual change structure, so that the blade body can be optimally optimized, good aerodynamic performance of the blade body is guaranteed, each section of blade is provided with the annular plate and the I-shaped connecting piece, the annular plate is subjected to direct laser blanking by adopting the flat plate, the identical cross section shapes of different positions of each section of blade can be guaranteed, the manufacturing precision is greatly improved, and the stress uniformity of each section is guaranteed; and the connecting strength is improved through the I-shaped connecting piece, and the connecting piece is convenient to connect with the skin.
Claims (10)
1. A torsion wind power generation blade comprises a blade body composed of a plurality of sections of blades; it is characterized in that the torsion angle of each section of blade arranged from the blade tip to the blade root is gradually increased, the whole section of the blade body is stepped through torsion angles with different sizes.
2. The blade of claim 1, wherein the twist angle of the tip portion of the blade body is zero and the twist angles of the blades of each segment increase in sequence from the tip portion to the root portion.
3. The blade according to claim 1, wherein each of the other blades except the tip portion of the blade body is twisted with a dislocation so as to form a discontinuous twist angle.
4. The blade according to claim 1, wherein the central axes of the blades in the longitudinal direction are twisted in the same direction to generate a twist angle.
5. A torsional wind power generating blade according to claim 1, wherein the cross-sectional shape of the blade body increases gradually from the tip to the root.
6. The blade according to claim 5, wherein the blade body has a gradually changing cross-sectional shape, and the blade body has a zigzag or saw-like shape on both sides.
7. The torsional wind power generation blade according to claim 1, wherein the blade body is divided into a plurality of sections of blades along the length direction, each section of blade comprises a skin and a skeleton for supporting the skin, and the skeleton is matched with the shape of the skin; and welding, riveting or screwing the blades of each section.
8. The torsional wind power generation blade of claim 1, wherein the inner cavity of the blade body is connected with a stem, and the stem extends along the blade root side of the blade body and is connected with the hub.
9. The torsional wind power generation blade of claim 7, wherein the skeleton comprises a plurality of annular plates in a curved shape, the annular plates are connected into a whole in series through I-steel, and a reinforcing structure is arranged in an inner cavity of the skeleton.
10. The blade of claim 7, wherein the skin is an aluminum alloy.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310668173.XA CN116624323A (en) | 2023-06-07 | 2023-06-07 | Torsional wind power generation blade |
| PCT/CN2023/140268 WO2024250633A1 (en) | 2023-06-07 | 2023-12-20 | Segmented wind turbine blade and transportation method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310668173.XA CN116624323A (en) | 2023-06-07 | 2023-06-07 | Torsional wind power generation blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116624323A true CN116624323A (en) | 2023-08-22 |
Family
ID=87616966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310668173.XA Pending CN116624323A (en) | 2023-06-07 | 2023-06-07 | Torsional wind power generation blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116624323A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024250633A1 (en) * | 2023-06-07 | 2024-12-12 | 远大可建科技有限公司 | Segmented wind turbine blade and transportation method therefor |
-
2023
- 2023-06-07 CN CN202310668173.XA patent/CN116624323A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024250633A1 (en) * | 2023-06-07 | 2024-12-12 | 远大可建科技有限公司 | Segmented wind turbine blade and transportation method therefor |
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