CN209818203U - Wind-powered electricity generation blade forked type apex gasbag structure and wind-powered electricity generation blade - Google Patents
Wind-powered electricity generation blade forked type apex gasbag structure and wind-powered electricity generation blade Download PDFInfo
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- CN209818203U CN209818203U CN201920292366.9U CN201920292366U CN209818203U CN 209818203 U CN209818203 U CN 209818203U CN 201920292366 U CN201920292366 U CN 201920292366U CN 209818203 U CN209818203 U CN 209818203U
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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 wind-powered electricity generation blade forked type apex gasbag structure and contain the wind-powered electricity generation blade of this structure, the leaf point part through replacing basic wind-powered electricity generation blade sets up forked type apex gasbag structure, the length of basic blade has effectively been prolonged on the one hand, wind turbine generator system's generated power and stability have been promoted, simultaneously through setting up the apex gasbag into forked structure, make the leaf point part can freely adjust the opening and shutting angle according to the incoming flow wind conditions, the stability of leaf point vortex has been guaranteed, the pneumatic load that the leaf point part bore has been reduced, set up the leading edge of apex gasbag structure into the wave in addition, the mobile separation state of apex has effectively been improved in addition, the pneumatic noise of wind-powered electricity generation blade has been reduced when promoting blade power, set up to the zigzag through the trailing edge with apex gasbag structure, the pneumatic noise of wind-powered electricity generation blade has also effectively been reduced.
Description
Technical Field
The utility model belongs to aerogenerator blade design field relates to a wind-powered electricity generation blade apex structure, especially relates to a wind-powered electricity generation blade forked apex gasbag structure and have the blade of this structure.
Background
With the rapid improvement of the installed capacity of wind power in China, a large-area wind power plant is built in a region with rich wind resources, and meanwhile, the wind resource characteristics of the region are changed to a certain extent, so that the output power of a wind turbine matched with the original wind resource characteristics is reduced. The wind turbine mainly captures wind energy by means of the wind power blade, and the length of the wind power blade directly influences the capability of the wind turbine for capturing the wind energy and the output power of the wind generating set. The length of the wind power blade is increased under low wind speed, so that the generated energy of the wind turbine can be effectively improved. However, with the continuous increase of the installed capacity of the wind turbine, the blades are slender, and under the action of various loads such as aerodynamic force, gravity and the like, the blades are inevitably bent and twisted. However, such deformation seriously affects the performance of the wind turbine, including reduction of power generation efficiency, fatigue failure, etc., and thus, in order to ensure safe and stable operation of the wind turbine, the quality of the blades needs to be reduced. In addition, the use of larger sized blades can significantly increase construction costs and installation difficulties, making transportation more difficult.
The cost of the wind power blade accounts for 15% -20% of the cost of the whole wind turbine, if the whole replacement of the active wind power blade is carried out, too high modification cost is increased, and the power generation cost is increased, so that the whole replacement of the blade is not beneficial to improving the economical efficiency of the modification of the wind turbine. The design of the wind power blade extension section and the implementation process which are reliable in structure and simple to implement is very important, and the reconstruction cost is reduced.
The existing blade tip extension technology is mainly characterized in that a composite material shell is simply bonded on the basis of the existing blade structure to extend the length of the blade, so that adverse construction caused by overlong bonding surfaces is easily caused, fatigue strength is insufficient due to the fact that the free bonding end is not reinforced, and structural strength and stability are poor and other adverse effects caused by the fact that a shear web is discontinuous in the span direction are easily caused. Furthermore, as the length of the blade increases, the tip speed increases, which leads to more significant problems with aerodynamic noise, and most importantly, extending the blade with a conventional tip increases the mass of the blade, which causes the blade to bear greater loads, which seriously affects the service life of the blade.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Aiming at the defects and shortcomings of the prior art, the utility model aims to provide a wind power blade fork type blade tip air bag structure and a wind power blade comprising the structure, the forked blade tip air bag structure is arranged by replacing the blade tip part of the basic wind power blade, on one hand, the length of the basic blade is effectively prolonged, the power generation power and the stability of the wind turbine generator are improved, meanwhile, the blade tip air bag is arranged into a branched structure, so that the opening and closing angle of the blade tip part can be freely adjusted according to the condition of incoming wind, the stability of the blade tip vortex is ensured, the pneumatic load borne by the blade tip part is reduced, in addition, the front edge of the blade tip air bag structure is arranged into a wave shape, and the flow separation state of the blade tip is effectively improved, the aerodynamic noise of the wind power blade is reduced while the power of the blade is improved, and the aerodynamic noise of the wind power blade is effectively reduced by setting the tail edge of the blade tip air bag structure to be zigzag.
(II) technical scheme
Before describing the solution to the problem, certain words are defined to facilitate the description.
The technical term "reinforcement" mentioned in the present invention is generally used for the part that the conventional design of wind turbine blade cannot relate to, and is used for enhancing the strength insufficiency that the local discontinuity or stress concentration of the structure may bring.
The term "spanwise" as used in the present invention generally refers to the direction of the wind turbine blade along the length thereof, and points from the blade root to the blade tip.
The term "free end" as used herein generally refers to a terminal end of a corresponding structure or material that is not constrained in an outward extending direction.
The utility model discloses a solve the technical scheme that its technical problem adopted and do:
a wind power blade forked type blade tip air bag structure comprises a basic blade and a forked type blade tip air bag, wherein the blade tip part of the basic blade is removed, the forked type blade tip air bag is arranged at the tail end of the basic blade with the blade tip removed, the outer surface of the tail end of the basic blade with the blade tip removed is formed into a connecting surface of the basic blade, and the wind power blade forked type blade tip air bag structure is characterized in that,
the forked blade tip air bag is integrally a closed air bag body and sequentially comprises a connecting section, a main body section and a forked section along the length direction of the closed air bag body, wherein the inner surface of the connecting section is sleeved on the connecting surface of the base blade, and the inner surface of the connecting section is fixedly connected with the connecting surface of the base blade; the main body section is located between the connecting section and the diverging section; the bifurcated section comprises two bifurcations with adjustable opening and closing angles, and the bifurcations extend outwards from the tail end of the main body section along the spanwise direction of the blade.
Preferably, the tail edge of the bifurcated tip air bag is in a zigzag shape, and the front edge of the bifurcated tip air bag is in a wave shape.
Preferably, a blade tip lightning-inducing cable is preset in a hollow area of the forked blade tip air bag, at least one lightning receptor is preset on the outer surface of the forked section, one end of the blade tip lightning-inducing cable is electrically connected with the lightning receptor, and the other end of the blade tip lightning-inducing cable is electrically connected with the lightning-inducing cable arranged in the base blade.
Preferably, the inflation port of the bifurcated tip airbag is arranged on the outer surface of the bifurcated section.
Preferably, the inner surface of the connecting section and the connecting surface of the base blade are connected by structural adhesive curing.
Preferably, the front edge and/or the rear edge of the connecting section are/is provided with a slot extending along the spanwise direction, and the shape of the slot is preferably rectangular or conical.
Preferably, the inner surface of the connection section and the connection surface of the base blade are each formed as a high roughness surface.
Preferably, the inner surface of the connecting section and the connecting surface of the base blade are both formed as a toothed surface.
Preferably, after the inner surface of the connecting section is bonded with the connecting surface of the base blade through structural adhesive, the gaps at the free end of the outer side adhesive joint of the blade and the front edge and/or the tail edge of the connecting section are reinforced.
According to the utility model discloses a wind-powered electricity generation blade, a serial communication port is still provided to another aspect, wind-powered electricity generation blade includes the utility model discloses foretell wind-powered electricity generation blade forked apex gasbag structure.
(III) advantageous effects
According to the above technical scheme, the utility model discloses a forked form apex gasbag structure compares with prior art, has following beneficial effect at least:
(1) the connection structure of the base blade and the forked blade tip air bag after the blade tip part of the base blade is removed can improve the reliability of the blade glue joint structure and effectively reduce the mass of the blade;
(2) the connecting structure of the base blade and the forked blade tip air bag after the blade tip part of the base blade is removed avoids the problems of low structural strength, poor stability and the like caused by the fact that the base blade is simply stuck to prolong the length of the blade;
(3) the front edge and/or the tail edge of the forked blade tip air bag connecting section are reinforced by the gap and the outer layer glue joint free end, so that the blade structure is prevented from local cracking;
(4) gaps are arranged on the front edge and/or the tail edge of the forked blade tip air bag connecting section, so that certain deformation of the connecting section can be guaranteed during bonding;
(5) the joints between the connection sections of the forked blade tip air bags and the connection surfaces of the tail ends of the basic blades are high-roughness surfaces, so that the stress concentration of the free ends of the joints is improved, and the reliability of the bonding of the blade tip air bags is effectively ensured;
(6) the joint surface of the forked type blade tip air bag connecting section and the tail end of the basic blade reinforces the glue joint free end at the outer side of the blade after the glue joint is finished, and is beneficial to improving the problem of stress concentration of the glue joint free end;
(7) the tail edge of the forked type blade tip air bag structure is in a sawtooth shape, so that the pneumatic noise can be effectively reduced;
(8) the front edge of the fork-shaped blade tip air bag structure is wavy, so that the flow separation state of the blade tip can be effectively improved, the power is effectively improved, and the aerodynamic noise is reduced;
(9) the bifurcate air sac structure has the advantages that the bifurcate sections of the bifurcate air sac structure form a plurality of bifurcates, the opening and closing angles among the bifurcates can be freely adjusted according to the conditions of incoming wind, the stability of the tip vortex is effectively guaranteed, and the aerodynamic load borne by the tip is reduced.
Drawings
Fig. 1 is a schematic structural view of a wind power blade, wherein (a) is a schematic structural view of a basic wind power blade, and (B) is a schematic structural view of a wind power blade provided with a bifurcated blade tip airbag according to the present invention;
fig. 2 is a schematic structural view of a bifurcated blade tip air bag of a wind power blade of the present invention;
FIG. 3 is a schematic view of the mating of the inner surface of the tip airbag attachment section with the attachment surface of the base blade;
FIG. 4 is a cross-sectional view of C-C of FIG. 2;
FIG. 5 is a cross-sectional view D-D of FIG. 2;
FIG. 6 is a schematic view of three exemplary bifurcated blade tip operating states.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, for the length of effective extension basic blade, improve the economic nature that wind turbine generator system transformed, the utility model discloses after getting rid of basic blade's tip part, set up forked formula apex gasbag on basic blade.
As shown in fig. 2, the utility model discloses a wind-powered electricity generation blade's apex gasbag structure, including basic blade 10 and forked form apex gasbag 20, the tip part of basic blade 10 is got rid of, and forked form apex gasbag 20 sets up at the end of the basic blade 10 of getting rid of the apex, and the surface of the terminal of the basic blade 10 of getting rid of the apex forms the connection surface of basic blade 10. The forked blade tip air bag 20 is integrally a closed air bag body and sequentially comprises a connecting section 21, a main body section 22 and a forked section 27 along the length direction of the closed air bag body, a hollow area of the forked blade tip air bag 20 extends from the connecting section 21 to the forked section 27, wherein the inner surface of the connecting section 21 is sleeved on the connecting surface of the base blade 10, and the inner surface of the connecting section 21 is fixedly connected with the connecting surface of the base blade 10; the main section 22 is located between the connecting section 21 and the diverging section 27; the bifurcated section 27 includes a plurality of branches extending outward from the end of the main body section 22 in the spanwise direction of the blade, and the opening and closing angle between the plurality of branches can be freely adjusted according to the incoming wind conditions (as shown in fig. 6), so as to ensure the stability of the tip vortex and reduce the aerodynamic load borne by the tip.
Specifically, the shape of the trailing edge 24 of the bifurcated blade tip air bag 20 is set to be zigzag, so that the aerodynamic noise of the blade tip is effectively reduced; the front edge 25 of the bifurcated blade tip air bag 20 is in a wave shape, so that the flow separation state of the blade tip is effectively improved, the power of the blade is improved, and the aerodynamic noise is reduced; a blade tip lightning-leading cable 23 is preset in the hollow area of the bifurcated blade tip air bag 20, at least one lightning receptor 26 is preset on the outer surface of the bifurcated section 27, one end of the blade tip lightning-leading cable 23 is electrically connected with the lightning receptor 27, and the other end of the blade tip lightning-leading cable is electrically connected with the lightning-leading cable arranged in the base blade 10. The inflation port 28 of the bifurcated tip airbag 20 is disposed on the outer surface of the bifurcated section 27.
The inner surface of the connecting section 21 of the bifurcated blade tip air bag 20 is connected with the connecting surface of the base blade 10 through structural adhesive curing, a gap extending along the spanwise direction is arranged at the front edge and/or the tail edge of the connecting section 21, and the shape of the gap is preferably rectangular or conical, so that certain deformation of the blade tip section is guaranteed during bonding. The inner surface of the connection section 21 and the connection surface of the base blade 10 are both formed as high-roughness surfaces for improving the stress concentration of the free end of the adhesive joint and ensuring the reliability of the adhesive joint of the bifurcated blade tip air bag and the base blade. As shown in fig. 3, the inner surface of the connecting section 21 and the connecting surface of the base blade 10 are preferably both formed as toothed surfaces 211, 101. After the inner surface of the connecting section 21 and the connecting surface of the base blade 10 are bonded by structural adhesive, the free end of the outer side of the blade is reinforced by adhesive bonding. After the inner surface of the connection section 21 and the connection surface of the base blade 10 are bonded by the structural adhesive, the gap at the leading edge and/or the trailing edge of the connection section is reinforced.
The bifurcated tip airbag 20 is disposed behind the tip of the base blade 10 and has cross-sectional views such as C-C, D-D shown in detail in FIGS. 4 and 5.
In this embodiment, after the tip portion of the base blade 10 is removed, the problem of poor structural strength and stability caused by simply sticking the tip section on the basis of the original blade to extend the length of the blade is avoided; the connection structure of the base blade 10 and the forked blade tip air bag 20 can improve the reliability of the blade glue joint structure. The inner surface of the connection section 21 of the bifurcated tip airbag 20 and the connection surface of the base blade 10 are formed as high roughness surfaces for improving stress concentration at the free end of the adhesive joint. After the basic blade 10 is bonded with the forked blade tip air bag 20, the bonding free end on the outer side of the blade is reinforced, and the problem of stress concentration of the bonding free end is favorably solved. After the basic blade 10 is bonded with the forked blade tip air bag 20, the gaps between the front edge and the tail edge of the blade and the outer side glue joint free end are reinforced, so that the local cracking of the blade structure is prevented.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A wind power blade forked type blade tip air bag structure comprises a basic blade and a forked type blade tip air bag, wherein the blade tip part of the basic blade is removed, the forked type blade tip air bag is arranged at the tail end of the basic blade with the blade tip removed, the outer surface of the tail end of the basic blade with the blade tip removed is formed into a connecting surface of the basic blade, and the wind power blade forked type blade tip air bag structure is characterized in that,
the forked blade tip air bag is integrally a closed air bag body and sequentially comprises a connecting section, a main body section and a forked section along the length direction of the closed air bag body, wherein the inner surface of the connecting section is sleeved on the connecting surface of the base blade, and the inner surface of the connecting section is fixedly connected with the connecting surface of the base blade; the main body section is located between the connecting section and the diverging section; the bifurcated section comprises two bifurcations with adjustable opening and closing angles, and the bifurcations extend outwards from the tail end of the main body section along the spanwise direction of the blade.
2. The wind turbine blade bifurcated blade tip air bag structure as claimed in claim 1, wherein a trailing edge of the bifurcated blade tip air bag is shaped as a sawtooth, and a leading edge of the bifurcated blade tip air bag is shaped as a wave.
3. The wind power blade bifurcated blade tip air bag structure as claimed in claim 1, wherein a blade tip lightning-leading cable is preset in a hollow area of the bifurcated blade tip air bag, at least one lightning receptor is preset on an outer surface of the bifurcated section, one end of the blade tip lightning-leading cable is electrically connected with the lightning receptor, and the other end of the blade tip lightning-leading cable is electrically connected with the lightning-leading cable arranged in the base blade.
4. The wind turbine blade bifurcated tip airbag structure as claimed in claim 1, wherein an inflation port of the bifurcated tip airbag is disposed on an outer surface of the bifurcated section.
5. The wind turbine blade bifurcated blade tip air bag structure as claimed in claim 1, wherein the inner surface of the connecting section and the connecting surface of the base blade are connected by structural adhesive curing.
6. The wind turbine blade bifurcated tip airbag structure as claimed in claim 5, wherein a slot extending in a spanwise direction is provided at a position of a leading edge and/or a trailing edge of the connecting section, and the slot is preferably rectangular or conical in shape.
7. The wind turbine blade bifurcated tip airbag structure of claim 6, wherein the inner surface of the connecting section and the connecting surface of the base blade are each formed as a high roughness surface.
8. The wind turbine blade bifurcated tip airbag structure of claim 7, wherein the inner surface of the connecting section and the connecting surface of the base blade are each formed as a toothed surface.
9. The wind turbine blade bifurcated blade tip airbag structure as claimed in claim 8, wherein the inner surface of the connecting section and the connecting surface of the base blade are bonded by a structural adhesive, and then gaps at the outer side bonding free end of the blade and the front edge and/or the tail edge of the connecting section are reinforced.
10. A wind turbine blade comprising a wind turbine blade bifurcated tip airbag structure as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920292366.9U CN209818203U (en) | 2019-03-08 | 2019-03-08 | Wind-powered electricity generation blade forked type apex gasbag structure and wind-powered electricity generation blade |
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| CN201920292366.9U CN209818203U (en) | 2019-03-08 | 2019-03-08 | Wind-powered electricity generation blade forked type apex gasbag structure and wind-powered electricity generation blade |
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| CN209818203U true CN209818203U (en) | 2019-12-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796931A (en) * | 2020-12-30 | 2021-05-14 | 西安利和愽机械制造有限公司 | Wind power turbulence structure |
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2019
- 2019-03-08 CN CN201920292366.9U patent/CN209818203U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796931A (en) * | 2020-12-30 | 2021-05-14 | 西安利和愽机械制造有限公司 | Wind power turbulence structure |
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