CN212360008U - Auxiliary structure for increasing wind energy utilization coefficient of wind turbine generator blade - Google Patents
Auxiliary structure for increasing wind energy utilization coefficient of wind turbine generator blade Download PDFInfo
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- CN212360008U CN212360008U CN202020541788.8U CN202020541788U CN212360008U CN 212360008 U CN212360008 U CN 212360008U CN 202020541788 U CN202020541788 U CN 202020541788U CN 212360008 U CN212360008 U CN 212360008U
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- blade
- energy utilization
- wind
- utilization coefficient
- wind turbine
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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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- 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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Abstract
The utility model discloses an auxiliary structure for increasing wind turbine generator system blade wind energy utilization coefficient comprises auxiliary wing and mounting groove, wherein, the mounting groove is fixed on the windward side of blade afterbody, is formed with the recess that supplies the auxiliary wing cartridge to fix on it, the auxiliary wing is fixed on the windward side of blade afterbody through the slant in inserting the recess of mounting groove to keep the contained angle of required size with the blade surface, flow to the blade afterbody with the reduction air current. The utility model discloses under the condition that does not increase blade length, can increase impeller output to increase blade wind energy utilization coefficient, in order to reach the purpose that increases wind turbine generator system capacity, thereby reduce complete machine research and development cost and manufacturing cost, improve the economic nature of wind-powered electricity generation development.
Description
Technical Field
The utility model belongs to the technical field of the technique of wind turbine generator system blade and specifically relates to indicate an auxiliary structure for increasing wind turbine generator system blade wind energy utilization coefficient.
Background
In the prior art, the adoption of a large-capacity offshore unit is required for the concentrated and continuous large-scale development of an offshore wind farm, so that the power consumption cost of the wind farm can be effectively reduced, and the overall economy of the large-scale development and utilization of the offshore wind farm can be improved. In order to improve the capacity of the wind generating set, the most important measure is to lengthen the length of the blades and increase the wind sweeping area of the wind wheel. As the length of the blade increases, higher demands are also placed on the design of the blade. The length of the blade is increased, in order to ensure the rigidity of the blade, the internal structure of the blade needs to be reinforced, the weight of the blade is correspondingly increased, the load of the whole machine is influenced, the load of related parts is also correspondingly increased, for example, a variable pitch bearing, a variable pitch system, a yaw bearing, a hub, a variable pitch control system and the like are added, and the research and development difficulty and the cost of the whole machine are increased. The increase of the length of the blade easily causes the phenomena of negative damping and aeroelastic diffusion. In order to ensure the rigidity of the blade and reduce the weight of the blade, the existing method is to change the material of the blade and adopt a carbon fiber material to replace the glass fiber material which is applied in large scale at present. The method can greatly increase the manufacturing cost of the blade, increase the investment cost of the wind field and reduce the economy of project development. In conclusion, blade development is an important factor which restricts the development of large-scale wind turbine generators at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome prior art's shortcoming and not enough, provide an auxiliary structure for increasing wind turbine generator system blade wind energy utilization coefficient, under the condition that does not increase blade length, increase impeller output to reach the purpose that increases wind turbine generator system capacity, thereby reduce complete machine research and development cost and manufacturing cost, improve the economic nature of wind-powered electricity generation development.
In order to achieve the above object, the present invention provides a technical solution: the utility model provides an auxiliary structure for increasing wind turbine generator system blade wind energy utilization coefficient comprises auxiliary wing and mounting groove, wherein, the mounting groove is fixed on the windward side of blade afterbody, is formed with the recess that supplies auxiliary wing cartridge to fix on it, the auxiliary wing passes through the slant to be fixed on the windward side of blade afterbody in the recess that inserts the mounting groove to keep the contained angle of required size with the blade surface, flow to the blade afterbody with the reduction air current, thereby increase blade wind energy utilization coefficient.
Furthermore, the mounting groove is fixed with the blade by adopting special glue.
Furthermore, the auxiliary wings and the mounting grooves are made of epoxy resin.
Compared with the prior art, the utility model, have following advantage and beneficial effect:
1. the utility model discloses can utilize the vortex wake of blade, increase blade torque, increase impeller output under the condition of not adding long blade to increase the output of unit, increase blade wind energy utilization coefficient promptly.
2. The utility model discloses can block and restrain the air current and flow along span direction, prevent that blade wingtip boundary layer from piling up thickly. The blade stall is easily caused by the fact that the boundary layer of the blade tip is excessively thick, and the aerodynamic imbalance of the impeller is easily caused by the fact that different blades of the same impeller cannot have the same stall condition at the same time. Thus, the auxiliary structure may enhance the aerodynamic balance of the impeller.
3. The utility model discloses can strengthen the rigidity of blade, reduce blade deformation volume.
Drawings
FIG. 1 is a simplified vortex wake flow diagram with wake expansion omitted.
Fig. 2 is a specific example of each blade having 3 auxiliary structures respectively mounted thereon.
Fig. 3 is a sectional view a-a of fig. 2.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
A wind turbine blade is a device that extracts energy from the wind, and the wind speed drops through the transfer of kinetic energy, but only the air that passes through the rotor disk is affected. The blades rotate about an angular velocity perpendicular to the rotor plane and parallel to the wind direction axis, sweeping to form a disk, and relying on the aerodynamic design of the blades to create a pressure differential across the disk. When the air flow passes through the impeller disc, the torque applied to the impeller and the torque applied to the air are equal in magnitude and opposite in direction, and the air rotates against the direction of the wind wheel in a rotating manner as a result of the action of the counter-torque, so that angular momentum is obtained, and thus, the air particles in the wake flow of the wind wheel disc obtain velocity components in the tangential direction and the axial direction of the rotating surface, as shown in fig. 1.
According to the aerodynamic characteristics of the impeller, the embodiment provides the auxiliary structure for increasing the wind energy utilization coefficient of the blades of the wind turbine generator, the auxiliary structure is arranged on the windward side of the tail of each blade, the kinetic energy generated by vortex wake flow can be effectively utilized, the rotating torque of the impeller is increased, and the purpose of increasing the output power of the impeller is achieved. Meanwhile, the auxiliary structure can effectively reduce the flow of air flow to the tail of the blade, and prevent the blade stall and the impeller aerodynamic imbalance caused by the excessively thick accumulation of the boundary layer of the wing tip of the blade; in addition, the auxiliary structure can also enhance the rigidity of the blade and reduce the deformation of the blade.
As shown in fig. 3, the auxiliary structure is composed of an auxiliary wing 1 and a mounting groove 2, wherein the mounting groove 2 is fixed on the windward side of the tail of the blade 3, and is adhered to the blade 3 by using a special adhesive, a groove for inserting and fixing the auxiliary wing 1 is formed on the mounting groove, the auxiliary wing 1 is obliquely fixed on the windward side of the tail of the blade 3 by being inserted into the groove of the mounting groove 2, and keeps a certain included angle with the surface of the blade 3, the wind resistance generated by the auxiliary structure is reduced as much as possible under the condition of utilizing the vortex wake flow, so that the torque of the blade is increased, the output power of the impeller is increased without lengthening the blade, and the wind energy utilization coefficient of the blade is increased. In addition, the auxiliary wing 1 is fixed by the clamping force of the mounting groove 2 and the frictional force of the contact surface so as to be replaced when the auxiliary wing 1 is damaged or aged. In addition, the auxiliary wing 1 and the mounting groove 2 can be made of epoxy resin by pouring.
As shown in fig. 2, the auxiliary structures are added on the windward side of the tail part of the blade 1, and 3 auxiliary structures are added on each blade. The projection of the auxiliary structure on the blade and the blade form a certain included angle, and wind resistance generated by the auxiliary structure when the impeller rotates is reduced. The auxiliary wing 1 can block and restrain airflow from flowing along the wingspan direction, prevent the boundary layer of the wing tip of the blade from being excessively thick, and enhance the aerodynamic balance of the impeller. The mounting groove 2 is adhered to the surface of the blade, so that the rigidity of the blade can be enhanced.
Remarking: the number and the installation positions of the auxiliary structures and the inclination angles of the auxiliary wings can be verified through modeling and simulation, and an optimal scheme is obtained.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that all the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (3)
1. The utility model provides an auxiliary structure for increasing wind turbine generator system blade wind energy utilization coefficient which characterized in that: the auxiliary wing is obliquely fixed on the windward surface of the tail part of the blade by being inserted into the groove of the mounting groove, and an included angle with the surface of the blade is kept to reduce the flow of air flow to the tail part of the blade, so that the wind energy utilization coefficient of the blade is increased.
2. An auxiliary structure for increasing the wind energy utilization coefficient of a wind turbine blade according to claim 1, wherein: the mounting groove is fixed with the blade by adopting special glue.
3. An auxiliary structure for increasing the wind energy utilization coefficient of a wind turbine blade according to claim 1, wherein: the auxiliary wings and the mounting grooves are made of epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020541788.8U CN212360008U (en) | 2020-04-14 | 2020-04-14 | Auxiliary structure for increasing wind energy utilization coefficient of wind turbine generator blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020541788.8U CN212360008U (en) | 2020-04-14 | 2020-04-14 | Auxiliary structure for increasing wind energy utilization coefficient of wind turbine generator blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212360008U true CN212360008U (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020541788.8U Active CN212360008U (en) | 2020-04-14 | 2020-04-14 | Auxiliary structure for increasing wind energy utilization coefficient of wind turbine generator blade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212360008U (en) |
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2020
- 2020-04-14 CN CN202020541788.8U patent/CN212360008U/en active Active
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