CN210889190U - Fan blade for medium and low wind speed - Google Patents
Fan blade for medium and low wind speed Download PDFInfo
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- CN210889190U CN210889190U CN201922021256.1U CN201922021256U CN210889190U CN 210889190 U CN210889190 U CN 210889190U CN 201922021256 U CN201922021256 U CN 201922021256U CN 210889190 U CN210889190 U CN 210889190U
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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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Abstract
The utility model provides a fan blade for middle-low wind speed, including former fan blade body, apex extension and green wing flap, wherein, former fan blade body includes root of blade and blade middle part, wherein, the one end in blade middle part is connected with root of blade, and the other end is connected with blade apex extension, the green wing flap is installed on blade apex extension; the utility model realizes the optimized control of the flow field near the tip of the blade through the Green flap, and achieves the purposes of improving the lift-drag ratio of the blade and coordinating and improving the aerodynamic characteristics of the blade; meanwhile, the wind catching capacity of the blades can be increased and improved, so that the power generation capacity of the fan in a medium-low wind speed area is improved.
Description
Technical Field
The patent relates to the technical field of wind power generation, in particular to a fan blade for medium and low wind speed.
Background
At present, the market of the wind power industry in high wind speed wind areas in China is basically developed. The medium and low wind speed wind area becomes a new investment focus in the wind power industry. The medium-low wind speed wind resource area is generally close to a city and a population density area, so that the method has the advantages of being close to a load center, convenient to grid connection, small in influence on power grid dispatching operation and the like, and has development potential. But because the wind resource is relatively poor, the wind energy conversion efficiency is low, the investment recovery period is long, and the development of the wind energy conversion system is greatly restricted. In order to solve the problem, the coping method in the market at present generally adopts a mode of lengthening blades or increasing the height of a tower, and the methods have the problems of increased weight of a fan, increased cost, influenced unit safety and the like.
Actual wind resource condition to well low wind speed, the utility model discloses an extension blade apex length and apex increase green wing flap's mode changes the blade wing section, optimizes blade aerodynamic, improves lift-drag ratio, promotes wind generating set and effectively catches the ability of wind energy, improves wind energy conversion efficiency.
Disclosure of Invention
An object of the utility model is to provide a fan blade for well low wind speed has solved the defect that current well low wind speed wind resource area wind power generation exists with high costs, security are poor.
In order to achieve the above purpose, the utility model discloses a technical scheme is:
the utility model provides a pair of a fan blade for well low wind speed, including former fan blade body, apex extension and green wing flap, wherein, former fan blade body includes root of leaf and blade middle part, and wherein, the one end and the blade root at blade middle part are connected, and the other end is connected with the apex extension of blade, the green wing flap is installed on the apex extension of blade.
Preferably, the structure of the blade tip extension part is the same as that of the original blade tip, and a mounting groove is formed in the tail edge of the lower surface of the blade tip extension part and arranged along the length direction of the fan blade; the green flap is disposed within the mounting slot.
Preferably, both ends of the green flap are fixed on both side walls of the mounting groove by mechanical shaft parts.
Preferably, the green flap is of a rectangular flat plate construction.
Preferably, the blade tip extension part is connected with one end of the blade middle part of the original fan blade body through an adhesive.
Preferably, the length of the blade tip extension part is less than or equal to 10% of the original blade length.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a fan blade for medium and low wind speed, which increases the wind sweeping area by prolonging the blade tip part of the blade; a Green wing flap is additionally arranged, so that the lift force of the blade is improved, the lift-drag ratio of the blade is improved, the blade profile is improved, and the formation of vortex is improved; the structure of the utility model can increase a small amount of materials under the condition of keeping the main structure of the original fan blade, thereby improving the wind catching efficiency of the blade to the maximum extent and improving the generating capacity of the wind turbine generator; the Green flap is used for realizing the optimized control of the flow field near the tip of the blade, so that the purposes of improving the lift-drag ratio of the blade and coordinating and improving the aerodynamic characteristics of the blade are achieved; the utility model relates to a fan blade can increase and improve the ability of catching wind of blade to improve the fan at the regional generating capacity of well low wind speed.
Drawings
FIG. 1 is a schematic view of a raw fan blade structure;
fig. 2 is a schematic structural view of a fan blade according to the present invention;
FIG. 3 is a schematic view of the assembly of a blade tip extension and a Green flap;
the device comprises a fan blade body 1, an original fan blade body 2, an original blade tip 3, a blade tip extension part 4, a Green flap 5 and a mechanical shaft part.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In the actual operation process of the fan blade, under the influence of factors such as an attack angle, blade airfoil profile and thickness, airflow is separated in different degrees after flowing through the front edge, the larger the attack angle is, the greater the separation degree between the airflow and the blade is, so that the operation resistance of the blade is increased, and the wind energy conversion efficiency of the unit is reduced.
To above circumstances, in order to realize the purpose that well low wind speed area promoted wind turbine generator system power, the utility model provides a pair of a fan blade for well low wind speed is to well low wind speed region, megawatt level, big blade wind turbine generator system, especially to the unit of power at 1.5MW and above, specifically:
as shown in fig. 1 to 3, the utility model provides a pair of a fan blade for well low wind speed, including former fan blade body 1, former blade apex 2, apex extension 3 and green wing flap 4, wherein, former fan blade body 1 includes root of leaf and blade middle part, and wherein, the one end and the root of leaf portion at blade middle part are connected, and the other end is connected with blade apex extension 3, green wing flap 4 is installed in blade apex extension 3 department.
The green flap 4 is arranged at or near the trailing edge of the lower surface of the blade tip extension 3 and along the length of the blade.
The green flap 4 is of a rectangular flat plate structure.
The green flap 4 is connected with the lengthened structural beam of the blade tip extension part 3 through a mechanical shaft part 5.
The structure of the blade tip extension part 3 is the same as that of the original blade tip 2, and a mounting groove is formed in the tail edge of the lower surface of the blade tip extension part 3.
The green wing flap 4 is installed in the mounting groove, and the two ends of the green wing flap 4 are installed on the two side walls of the mounting groove through the mechanical shaft component 5.
The blade tip extension part 3 is connected with one end of the middle part of the blade of the original fan blade body 1 through an adhesive.
The blade tip extension part 3 is of a curved surface structure, and the curved surface structure is composed of a pressure surface and a suction surface.
And the tip pressure surface and the suction surface of the blade tip extension part 3 are respectively attached to the pressure surface and the suction surface of the original fan blade body 1 and are in smooth transition.
The length of the blade tip extension part 3 is less than or equal to 10% of the original blade length.
Because the blade tip extension part 3 is additionally arranged on the original fan blade body 1, and the Green flap 4 is arranged on the blade tip extension part 3, the parameters of the obtained new fan blade, such as the equivalent torsion angle, the equivalent attack angle, the chord length and the like, are changed, and a new aerodynamic shape is formed.
A processing method for a fan blade with medium and low wind speed comprises the following steps:
and 2, connecting the blade tip extension part 3 at the free end of the middle part of the blade through an adhesive.
The blade tip of the original blade is extended, and meanwhile, a Green flap structure is added at the extended part of the blade tip, so that a new pneumatic appearance is constructed at the tip part of the blade while the blade is extended; the structure can increase a small amount of materials under the condition of keeping the main structure of the original fan blade, so that the wind catching efficiency of the blade is improved to the maximum extent, and the generating capacity of the wind turbine generator is improved; the Green flap is used for realizing the optimized control of the flow field near the tip of the blade, and the purposes of improving the lift-drag ratio of the blade and coordinating and improving the aerodynamic characteristics of the blade are achieved.
The blade tip part of the blade is prolonged, so that the wind sweeping area is increased; and the Green wing flap is additionally arranged, so that the lift force of the blade is improved, the lift-drag ratio of the blade is improved, the blade profile is improved, and the formation of vortex is improved. The production process is similar to that of the traditional blade, and the wind capturing capacity of the blade can be increased and improved, so that the power generation capacity of the fan in a medium-low wind speed area is improved.
The structure can be transformed based on the blade structure during specific implementation, and the production and installation of required pneumatic components can adopt the production process of the original blade. The production of the parts can be realized by adopting the processes of vacuum infusion, lamination and the like, and the installation can be realized by adopting the processes of hand-pasted fiber cloth reinforcement, structural adhesive bonding, putty filling, polishing and the like.
Claims (6)
1. The utility model provides a fan blade for well low wind speed, its characterized in that includes former fan blade body (1), apex extension (3) and green wing flap (4), wherein, former fan blade body (1) includes root of blade portion and blade middle part, and wherein, the one end and the root of blade portion in blade middle part are connected, and the other end is connected with blade apex extension (3), green wing flap (4) are installed on blade apex extension (3).
2. The fan blade for medium and low wind speed according to claim 1, wherein the structure of the blade tip extension part (3) is the same as that of the original blade tip (2), and a mounting groove is formed in the tail edge of the lower surface of the blade tip extension part and arranged along the length direction of the fan blade; the Green flap (4) is arranged in the mounting groove.
3. A fan blade for medium and low wind speeds according to claim 2, characterised in that the green flap (4) is fixed at both ends to both side walls of the mounting slot by means of mechanical shaft parts (5).
4. A fan blade for medium and low wind speeds according to claim 1, characterized in that the green flap (4) is of a rectangular flat plate structure.
5. The fan blade for medium and low wind speeds according to claim 1, wherein the blade tip extension (3) is connected with one end of the blade middle part of the original fan blade body (1) through an adhesive.
6. A fan blade for medium and low wind speeds according to claim 1, characterised in that the length of the blade tip extension (3) is less than or equal to 10% of the original blade length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922021256.1U CN210889190U (en) | 2019-11-19 | 2019-11-19 | Fan blade for medium and low wind speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922021256.1U CN210889190U (en) | 2019-11-19 | 2019-11-19 | Fan blade for medium and low wind speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210889190U true CN210889190U (en) | 2020-06-30 |
Family
ID=71321017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922021256.1U Active CN210889190U (en) | 2019-11-19 | 2019-11-19 | Fan blade for medium and low wind speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210889190U (en) |
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2019
- 2019-11-19 CN CN201922021256.1U patent/CN210889190U/en active Active
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