CN202596996U - Self-adaptive fan blade for wind power generation - Google Patents
Self-adaptive fan blade for wind power generation Download PDFInfo
- Publication number
- CN202596996U CN202596996U CN2012201270377U CN201220127037U CN202596996U CN 202596996 U CN202596996 U CN 202596996U CN 2012201270377 U CN2012201270377 U CN 2012201270377U CN 201220127037 U CN201220127037 U CN 201220127037U CN 202596996 U CN202596996 U CN 202596996U
- Authority
- CN
- China
- Prior art keywords
- fan blade
- wind
- hard
- skirt section
- power
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- Y02E10/722—
Landscapes
- Wind Motors (AREA)
Abstract
The utility model discloses a self-adaptive fan blade for wind power generation, belonging to the technical field of wind power generation. The self-adaptive fan blade is composed of a hard fan blade and a soft bat skirt, wherein the soft bat skirt is connected onto the rear edge of the hard fan blade. A contrast blowing example test proves that the output power of the fan blade is completely increased compared with a model machine, and the lower the wind speed is, the larger the range increasing is. Under the conditions of same diameters, same blade quantities, and same wind speed, after the bat skirt fan blade is installed on the model machine (Guanzhou Shijia AN-FD400W), the increasing percentage of the power is as follows: the power is increased by 80 percent under light breeze (3.3 meter/second) (the power generation cost is reduced by 44 percent); the power is increased by 32 percent under gentle breeze (breeze 5.4 meter/second), the power is increased by 18 percent under moderate breeze (7.9 meter/second), and all the increasing percentage of the power can be searched in test data. The increasing percentage is a preliminary result, and the percentage is further increased to the level close to the limit 59.3 percent of the wind-power utilization coefficient.
Description
Technical field
The utility model belongs to technical field of wind power generation, relates to correlative technology fields such as aviation, ship propeller, is specifically related to a kind of wind-power electricity generation self adaption fan blade.
Background technique
Use not only befouling environment but also soon exhausted of coal and petroleum-based energy; Wind energy is the green energy resource that can freely use forever that nature is vouchsafed.Generally believe that at present wind-power electricity generation is best alternative green energy resource, but also have big, the difficult problem of looking for, being difficult to the large-scale popularization use of wind field of cost mean wind velocity high, that generating is required.Therefore need research and develop at present improve generating efficiency, improve the blower fan power coefficient, reduce the cost of wind-power electricity generation and reduce the generating mean wind velocity, can be at the little wind wind-driven generator that uses of region widely.
The shortcoming of existing wind-driven generator is: " little wind " does not change; " apoplexy " sent out not how many electricity (wind energy and wind speed cube be directly proportional); " strong wind " is rarely found; Even installation rated power (corresponding wind speed 13-14 meter per second, strong breeze) is very big, but annual electricity generating capacity is very little; Annual electricity generating capacity is closely related with annual mean wind speed, and national most of areas annual mean wind speed is less than standard wind field wind speed 6 meter per seconds.Existing rigidity fan blade wind driven generator, reducing starting wind velocity is a pair of contradiction with increasing power coefficient, you can't have both at the same time.Little blower fan is in order to reduce starting wind velocity, and power coefficient in but having lost, during strong wind has lost the strong wind energy.High-power blower fan blade torsion angle is by the design of wind speed 8 meter per seconds, and this moment, power coefficient was bigger, had but lost little wind power coefficient, and efficient is lower.Though high-power blower adopts the big square method of the whole change of fan blade to reduce starting wind velocity, just idle running, because airflow direction and the serious off resonance of fan blade torsion angle, the incision wind speed that has just generated electricity is still bigger, has wasted little wind wind energy.And the frequency that annual little wind occurs in the reality is very high, and accumulated energy is very big.
Beijing has 3-4 days every year approximately scrapes strong breeze (10.8-13.8 meter per second), and it is very little that the accumulative total hour number accounts for annual total hour number ratio.Beijing, the about 2.1-2.3 meter per second of Guangzhou annual mean wind speed.Existing fan design point is 8 meter per seconds, and it is actual not meet China.Fan blade with the utility model research and development exchanges with the diameter impeller of blower with existing, and warp has been realized with the model machine contrast test: starting, incision wind speed are little; Power coefficient improves comprehensively, and the more little increase of wind speed is many more, has improved annual electricity generating capacity, has reduced cost of electricity-generating.
The document [1] that sees reference, " wind energy conversion system aerodynamics " (second edition), China Electric Power Publishing House, in June, 2009 Beijing first impression provides the physical connotation of axial inducible factor α in the literary composition.
Application for a patent for invention number is 200810105693.5 patent application, discloses a kind of self-adapting wind wheel for wind power generation, and through the model machine research and development, the performance comparison test obtains good effect to the utility model on this basis.
The model utility content
The utility model provides a kind of wind-power electricity generation self adaption (skirt section) fan blade to the problem that exists in the existing blower fan technology, is mainly used in the wind power plant, improves wind-power electricity generation efficient, reduces the blower fan cost of electricity-generating.
The technological scheme of the utility model is following:
The self adaption fan blade that the utility model provides is made up of hard fan blade and flexible skirt two-part, and wherein, it is last that flexible skirt is connected the back edge of hard fan blade.Hard fan blade partly is a rigidity, and optimal design the aerofoil profile of hard fan blade, be used to bear curved power, keep air foil shape etc.; The back edge of hard fan blade connects the skirt section, and the skirt section is flexible, can effectively improve power coefficient.The skirt section is earlier pressing plate to be pushed down the skirt section to be connected with screw along the back at the back of hard fan blade with annexation between the hard fan blade; Perhaps directly that the back edge of hard fan blade is bonding with the skirt section; Perhaps the skirt section is inserted in the windward side and the seam between the lee face on edge behind the hard fan blade, screw connects or is bonding then.
The fan blade that the utility model provides is through contrast blowing verification experimental verification, and output power is than the comprehensive improve of model machine, and the more little increase rate of wind speed is big more.Under diameter, the number of blade, wind speed the same terms, after model machine (the good AN-FD400W of Guangzhou generation) was changed the skirt section fan blade of the utility model, it is following that power improves percentage: below the light breeze (3.3 meter per second) was 80%, reduced cost of electricity-generating 44%; Below the force 3 wind (gentle breeze 5.4 meter per seconds) is 32%, reduces cost of electricity-generating 24%; (7.9 meter per second) is 18% below the moderate breeze, reduces cost of electricity-generating 15%, all has test data to look into.This fan blade has promptly made full use of the little wind that often has and the wind of medium wind speed, and the strong wind efficient that falls in also has raising; Annual electricity generating capacity is big, and cost of electricity-generating significantly reduces; The use region is wide, is convenient to large-scale popularization and uses.
Description of drawings
Figs is the embodiment accompanying drawing, only is used for explaining examples of implementation of the utility model, but is not used in the technological scheme that limits the utility model:
Figure 1A and Figure 1B are respectively plan view and the schematic representation of side view of an instance of the wind-power electricity generation self adaption fan blade that the utility model provides;
The three-dimensional profile schematic representation of hard fan blade part of an instance of the wind-power electricity generation self adaption fan blade that Fig. 2 provides for the utility model;
Fig. 3 A～Fig. 3 D is the aerofoil profile schematic representation that the hard fan blade of an instance of the wind-power electricity generation self adaption fan blade that provides of the utility model leans on four cross sections of blade root;
Fig. 4 A～Fig. 4 D is the aerofoil profile schematic representation that the hard fan blade of an instance of the wind-power electricity generation self adaption fan blade that provides of the utility model leans on four cross sections of blade tip.
Among the figure:
1. blade tip; 2. blade root; 3. groove; 4. edge after; 5. windward side; 6. lee face.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is elaborated.
The utility model provides a kind of wind-power electricity generation self adaption fan blade and design method thereof; Shown in Figure 1A and 1B, the wind-power electricity generation self adaption fan blade that the utility model provides is made up of hard fan blade and flexible skirt two-part; Wherein, flexible skirt is connected on the back edge 4 of hard fan blade.The skirt section with annexation between the hard fan blade can be: after the skirt section is pushed down with pressing plate in the back edge 4 of hard fan blade, be connected with screw; Perhaps directly that the back edge of hard fan blade is bonding with the skirt section; Perhaps the skirt section is inserted behind the hard fan blade along in 4 the windward side 5 and the seam between the lee face 6 screw connection or bonding then.Seeing hard fan blade shown in Figure 2, is to adopt solid construction for little blower fan, makes through the casting mode, and big blower fan can adopt hollow structure, with weight reduction.Left side in conjunction with the aerofoil profile of the hard fan blade shown in the accompanying drawing 3 is windward side 5, is made up of slick and sly connection the between two sections circular arcs two sections circular arcs.Right side lee face 6 also is made up of two sections circular arcs, also is slick and sly the connection between two sections circular arcs.Three schematic cross-sections that airfoil structure is the root of the hard fan blade among Fig. 2 of Fig. 3 A, Fig. 3 B and Fig. 3 C; Be provided with the groove 3 of the degree of depth 1～5mm at hard fan blade root; Length account for whole blade length 30～100%; Groove 3 structures are used to connect the skirt section, and promptly described flexible skirt can also can all be provided with along 4 the back at hard fan blade along 4 behind hard fan blade root.Described skirt section only is connected the windward side 5 of hard fan blade.Fig. 3 D middle section is hard fan blade cross section (aerofoil profile) schematic representation that does not have groove location.Shown in Fig. 4 A～Fig. 4 D, fan blade cross section from left to right section area dwindles gradually.
Described skirt section structure is shown in Figure 1A and Figure 1B, and the left side is a fan blade blade root 2 among Figure 1A, and the right side is a blade tip 1, and downside is edge 4 behind the fan blade, and skirt section integral body is the triangular-arc shape, and the skirt section is narrow near the part of blade tip 1, and is wide near the part of blade root 2.The skirt section width (promptly from behind the fan blade along to the lower edge, skirt section, perhaps among the accompanying drawing 1A from hard fan blade downside bottom to the skirt section) be 1～4.5 times of blade tip aerofoil profile chord length.The radius of arc on two sections circular arc limits in skirt section is respectively: the skirt section width that near the radius on one section circular arc limit of blade tip 1 is 3～6.5 times.For being the center of circle with blade rotation center of circle O, radius is 20～35% of a hard fan blade length near blade root 2 partial arc radiuses.
Described flexible skirt can be processed with spring steel plate, aluminum alloy sheet, PC sheet and other flexible platelets.Hard fan blade partly is a rigidity, and optimal design the aerofoil profile of hard fan blade, be used to bear curved power, keep air foil shape etc.; The back edge of hard fan blade connects the skirt section, and the skirt section is flexible, can effectively improve power coefficient.
The design method of the above-mentioned wind-power electricity generation self adaption fan blade that provides comprises the steps:
The first step confirms that earlier blower fan just to mains supply or to the voltage of storage battery charging, confirms the incision rotational speed N of wind wheel power supply again; Described wind wheel is meant the rotating mechanism that the self adaption fan blade that comprises the utility model and wheel hub are formed.
In second step,, confirm that self adaption fan blade different radii place tangential velocity compares λ with wind speed according to the incision rotational speed N in the first step
i, i is a natural number, i>=8;
In the 3rd step, compare λ with wind speed by the tangential velocity in second step
iConfirm blade different radii place air-flow flow inlet angle
Wherein, i is a natural number, i >=8, and a is the axial inducible factor of wind speed; A=0～0.333, concrete numerical value is by factors such as the efficient decision in fan blade Airfoil Design, smooth surface degree, skirt section.
The 4th step is by the gentle air horn that flows to of air-flow angle of attack
Calculate fan blade torsion angle Q
i:
Described air-flow angle of attack is an empirical value, and general elder generation confirms that blower fan has just begun the air-flow angle of attack that generates electricity, and span is in 0～7 degree scope; I is a natural number, i >=8.
The 5th step, the confirming of the length of flexible skirt, width, thickness, material, during with starting wind velocity slightly backward swing be advisable.The most handy blowing verification experimental verification power coefficient Cp value.
Described incision rotating speed is meant that blower fan has just begun the rotating speed that generates electricity.
Self adaption (skirt section) fan blade that the utility model is provided changes the outfit on the AN-FD400W; Power coefficient Cp improves a lot; Also can further improve through further optimization Test, progressively near power coefficient Cp limiting value 59.3%, near the efficient of batswing tab.During the design method of this model utility can be applied in fully, in the large fan research and development.The utility model principle also can be used on aircraft and the boats and ships associated fluid Component Design.
Claims (8)
1. wind-power electricity generation self adaption fan blade is characterized in that: be made up of hard fan blade and flexible skirt two-part, wherein, it is last that flexible skirt is connected the back edge of hard fan blade; Described skirt section integral body is the triangular-arc shape, and the skirt section is narrow near the part of blade tip, and is wide near the part of blade root, and the skirt section width is 1～4.5 times of blade tip wing chord length; The radius of arc on two sections circular arc limits in skirt section is respectively: the skirt section width that near the radius on one section circular arc limit of blade tip is 3～6.5 times; For being the center of circle with the blade rotation center of circle, radius is 20～35% of a hard fan blade length near the leaf root part radius of arc.
2. wind-power electricity generation self adaption fan blade according to claim 1; It is characterized in that: the skirt section is earlier pressing plate to be pushed down the skirt section to be connected with screw along the back at the back of hard fan blade with annexation between the hard fan blade; Perhaps directly that the back edge of hard fan blade is bonding with the skirt section; Perhaps the skirt section is inserted in the windward side and the seam between the lee face on edge behind the hard fan blade, screw connects or is bonding then.
3. wind-power electricity generation self adaption fan blade according to claim 1 is characterized in that: described hard fan blade adopts solid construction or hollow structure.
4. wind-power electricity generation self adaption fan blade according to claim 1 is characterized in that: the windward side of the aerofoil profile of described hard fan blade and lee face are made up of two sections circular arcs respectively, slick and sly respectively connection the between two sections circular arcs.
5. wind-power electricity generation self adaption fan blade according to claim 1 is characterized in that: be provided with groove at hard fan blade root, length accounts for 30～100% of whole hard fan blade length, and groove structure is used to connect the skirt section.
6. wind-power electricity generation self adaption fan blade according to claim 5 is characterized in that: the degree of depth of described groove is 1～5mm.
7. wind-power electricity generation self adaption fan blade according to claim 1, it is characterized in that: described skirt section is connected the windward side of hard fan blade.
8. wind-power electricity generation self adaption fan blade according to claim 1 is characterized in that: described flexible skirt is processed with spring steel plate, aluminum alloy sheet, PC sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201270377U CN202596996U (en) | 2012-03-15 | 2012-03-29 | Self-adaptive fan blade for wind power generation |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220097604.9 | 2012-03-15 | ||
| CN201220097604 | 2012-03-15 | ||
| CN2012201270377U CN202596996U (en) | 2012-03-15 | 2012-03-29 | Self-adaptive fan blade for wind power generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202596996U true CN202596996U (en) | 2012-12-12 |
Family
ID=47314543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201270377U Expired - Lifetime CN202596996U (en) | 2012-03-15 | 2012-03-29 | Self-adaptive fan blade for wind power generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202596996U (en) |
-
2012
- 2012-03-29 CN CN2012201270377U patent/CN202596996U/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Karthikeyan et al. | Review of aerodynamic developments on small horizontal axis wind turbine blade | |
| Schubel et al. | Wind turbine blade design review | |
| CN104405596B (en) | Wind turbine generator system low-wind-speed airfoil section family | |
| US20100166556A1 (en) | Partial arc shroud for wind turbine blades | |
| CN101876291B (en) | Wind turbine blade airfoil family | |
| Siram et al. | Blade design considerations of small wind turbines: From classical to emerging bio-inspired profiles/shapes | |
| CN201433856Y (en) | Combined wind driven generator | |
| CN103306907B (en) | A kind of heavy thickness aerofoil with blunt tail edge blade of large fan | |
| CN103410657A (en) | Ribbed and grooved type wind turbine blade | |
| CN105545583B (en) | Wind power generation blade and lee face go out to flow the determination method at tangent line inclination angle | |
| CN203515955U (en) | Thickened high-aerodynamic-performance wind turbine blade | |
| CN202596996U (en) | Self-adaptive fan blade for wind power generation | |
| CN102720643B (en) | Self-adapting wind blade for wind power generation | |
| CN104295442A (en) | Dual-wind-wheel horizontal-axis wind turbine | |
| CN110566400B (en) | Horizontal shaft wind turbine blade | |
| CN106704092A (en) | Synergistic spoiler blade | |
| CN208870737U (en) | A kind of pneumatic equipment bladess | |
| CN203297032U (en) | Wind turbine vane and wind turbine | |
| CN202756173U (en) | Adjustable-speed wind wheel | |
| CN207245926U (en) | Blade of wind-driven generator and wind-driven generator | |
| CN208010513U (en) | A kind of screw type blade of wind-driven generator | |
| CN106837683B (en) | The optimal value for going out to flow tangent line inclination angle of windward side determines method | |
| CN206522215U (en) | Synergy spoiler blade | |
| CN114201841A (en) | Blade design method and blade for wind generating set | |
| CN207245927U (en) | Wind power generation blade and wind generator system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |