CN110439743A - A kind of novel wind motor subsection blade - Google Patents
A kind of novel wind motor subsection blade Download PDFInfo
- Publication number
- CN110439743A CN110439743A CN201910852688.9A CN201910852688A CN110439743A CN 110439743 A CN110439743 A CN 110439743A CN 201910852688 A CN201910852688 A CN 201910852688A CN 110439743 A CN110439743 A CN 110439743A
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- blade
- section
- blade root
- root section
- shell
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- 238000000465 moulding Methods 0.000 claims description 10
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- 238000012545 processing Methods 0.000 claims description 8
- 239000012634 fragment Substances 0.000 claims description 6
- 238000012805 post-processing Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- 239000006261 foam material Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
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- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
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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
-
- 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
Abstract
The present invention relates to a kind of novel wind motor subsection blades, blade tip section is attached with blade root section by connecting local vane change device, flange and the connector of changeover portion, blade root section be cylinder or be approximately cylinder rotary structure, its outer surface is enclosed with the rectification shell of lightweight, and the light filling Sandwich materials between rectification shell and blade root section.Rectifying shell includes leading edge extensional shell structure, rear extensional shell structure, and the leading edge and rear of envelope blade root section, form the air foil shape lengthened respectively to leading edge and rear respectively.The present invention is convenient for manufacture, transport and the installation of blade, can effectively improve production efficiency, reduces cost.
Description
Technical field
The present invention relates to wind turbine technology, in particular to a kind of novel wind motor subsection blade.
Background technique
With the increase of new energy demand, wind energy conversion system single machine installed capacity is gradually increased, and wind electricity blade is as Wind turbines
Core component, with the increase of unit capacity, the vane size is also gradually increased.From the point of view of the production technology of current blade,
There are many technical bottlenecks for the production of whole big blade: one side blade enlargement brings great difficulty, leaf in manufacture
The increase of chip size causes load and stress at blade root to be consequently increased, therefore, it is necessary to blade produce laying during into
Row structural strengthening, excessive due to blade dimensions, required glass laying is blocked up, and existing resin infusion technique is difficult thoroughly to fill
Thoroughly, structure laying is thicker, and perfusion difficulty is bigger.Therefore, the blade that further manufacture is bigger is wanted under the prior art, in technique
In the presence of very big difficulty.
On the other hand, the installation and transportation of big blade also face problems, with the increase of blade dimensions, the transport of blade
Many difficulties, such as limitation from road and means of transport, usual the vane size and maximum chord length are also faced with installation
There is a specific upper limit value, if exceeding the limitation, is even able to produce and produces qualified blade, transport is also difficult to
It realizes；In addition, the increase of blade dimensions, also brings very big challenge to the installation of wind field blade, big blade is resisted in wind field
The ability of extreme weather is poor, and aerodynamic loading suffered by extreme weather is larger, and security reliability problem is also more severe.Therefore, with
The exploitation of large sized unit, it is desirable to blade section manufacture, transport and installation be by the big blade that output and unit match
The necessary road of blade technology development.
And existing blade section technology common problem has:
1, connection scheme is complicated, reliability is poor, with high costs, may reduce pneumatic efficiency etc..These problems are
Limit the major reason of fragmentation technique actual use；
2, the additional mass that connection structure introduces at segmentation, brings unfavorable shadow to blade root load and corresponding pitch variable bearings
It rings, the exploitativeness of segmentation scheme is poor；
3, when connection structure bolt fastening operates at segmentation, working space is small, difficult to install, and later maintenance is difficult, safeguards
It is at high cost.
Summary of the invention
The present invention provides a kind of novel wind motor subsection blade, convenient for the manufacture, transport and installation of blade, can effectively mention
High efficiency reduces cost.
In order to achieve the above object, the technical solution of the present invention is to provide a kind of novel wind motor subsection blades, include leaf
Apical segment, blade root section, connection changeover portion, rectification shell；
Wherein, the blade tip section is connect by connection changeover portion with blade root section one end, and the blade root section other end is connect with wheel hub；
The blade root section is rotary structure, and the rectification shell is the lightweight shell structure for being wrapped in blade root section outer surface.
Optionally, the rectification shell includes leading edge extensional shell structure, rear extensional shell structure, respectively described in envelope
The leading edge and rear of blade root section, to form the aerofoil profile shape lengthened respectively to leading edge and rear on the outside of the cylinder of the blade root section
Shape.
Optionally, light sandwich material is equipped between the rectification shell and blade root section；The light sandwich material is light
Matter foamed material or Ba Sai wood material.
Optionally, blade root section comprising cylinder or be approximately cylinder cylinder；The blade root section is hollow or solid.
Optionally, the length of the rectification shell is greater than the length of blade root section, makes the rectification shell in the longitudinal direction
The outside of wheel hub and/or blade tip section is extended to, the rectification shell is directly connected to wheel hub and/or blade tip section.
Optionally, the length of the rectification shell is greater than the length of blade root section, makes the rectification shell in the longitudinal direction
The outside of blade tip section is extended to, the connection changeover portion is included in the confined space surrounded by the rectification shell.
Optionally, the connection changeover portion includes local vane change device, flange and connector；
The root of the blade tip section and blade root section is attached equipped with the flange matched by connector；The blade tip
The interface of section and blade root section, is embedded with the local vane change device matched.
Optionally, the local vane change device includes pitch variable bearings and gear；The connector includes single or double
Bolt.
Optionally, the interface bore of the blade tip section makes the interface of blade tip section be embedded in leaf less than the interface bore of blade root section
In the interface of root segment, then by connecting changeover portion it connect the blade tip section and blade root section；
Alternatively, the interface bore of the blade tip section makes the interface insertion blade tip of blade root section greater than the interface bore of blade root section
In the interface of section, then by connecting changeover portion it connect the blade tip section and blade root section.
Optionally, blade tip section and blade root section are produced and are transported respectively, are the integral hoistings after the assembling of ground, or
It is assembled again after lifting respectively；
The blade tip section is by made of glass fiber cloth laying, form, molding, demoulding, surface processing and post-processing；
The blade root section is by made of glass fiber cloth laying, form, molding, demoulding, surface processing and post-processing.
Optionally, the rectification shell is installed in blade root section in factory or at wind field scene；The rectification shell
Comprising the multiple fragments produced respectively, the fragment is separately mounted in blade root section；Alternatively, the rectification shell include part at
Multiple housing segments of type segmentation production are covered and are connected with each other between the housing segments on blade root section cylinder；
Alternatively, the rectification shell is integrally formed with blade root section: the rectification shell is by glass fiber cloth laying, fills
After injection forming, molding, demoulding, surface processing is carried out with the blade root section and is post-processed.
Novel wind motor subsection blade of the invention proposes a kind of new subsection blade connection scheme and assembly method,
It is high to can solve existing subsection blade manufacturing cost；The increased additional mass of attachment device at segmentation, to this structure of blade and change
The negative effect that paddle shaft is held is big；And solve the problems such as subsection blade exploitativeness is poor, junction installation maintenance is at high cost.
It, can be with lower cost production length more 1. subsection blade of the invention breaches the limitation of production and transportation
Long blade meets the needs of marine or land bigger wind turbine group, and the segmentation of blade can be reduced effectively due to big blade
The process procedures such as structural reinforcement needed for transport or lifting, reduce the raw material of blade processing, have saved the life of blade
Production and material cost.
On the other hand, so that the overlay thickness of glass-fiber-fabric is reduced: due to being extended in blade root section using outer housing, inside filling
The mode of light sandwich material has been saved the laying of glass-fiber-fabric, has been greatly reduced compared to the existing blade of equivalent specifications size
The difficulty of link is perfused in blade manufacturing process, may be implemented the loss of weight and cost declining of blade.
2. blade root section is simple with blade tip section connection structure, the section form of interface is small-bore interface embedded connects to heavy caliber
Mode inside mouthful, so that the non-homogeneous transition connection in junction (that is, segmentation junction construction profile can be inconsistent), operating space
More sufficient, embedded connection type makes the operability space of junction big, is easily installed operation, and exploitativeness is strong,
Flanged joint is also more reliable, high production efficiency, at low cost.
3. the present invention can reduce the ultimate load under extreme weather, embedded connection type using local variable pitch technology
The size of pitch variable bearings can be reduced, reduce pitch variable bearings manufacturing cost.
4. blade root section using aerofoil profile shell rectify configuration design, rectification shell shape integrate (reshape) blade root section with
The leading edge of blade root section cylinder and rear are lengthened respectively, increase the chord length of blade root section cylinder, improve cylinder by blade tip section shape
Aeroperformance, promote the pneumatic efficiency of integral blade.
Detailed description of the invention
Fig. 1 is the global schematic diagram of subsection blade of the invention；
Fig. 2 is the schematic diagram for rectifying shell on subsection blade；
Fig. 3 is the schematic diagram of blade root section；
Fig. 4 is the schematic diagram that blade root section is connect with blade tip section；
Fig. 5 is the sectional view of blade root section and rectification shell.
Specific embodiment
As shown in Figure 1 and Figure 2, the present invention provides a kind of novel wind motor subsection blade, comprising blade tip section 5, blade root section 1, connects
Connect changeover portion 4, rectification shell.Wherein, blade tip section 5 is connect by connection changeover portion 4 with 1 one end of blade root section, blade root 1 other end of section
It is connect with wheel hub；Rectification shell is wrapped in 1 outside of blade root section, and 1 outer surface of blade root section is made to be maintained preferably aerodynamic configuration.
As shown in figure 3, blade root section 1 is a kind of rotary structure, for example, cylinder or be approximately cylinder cylinder, can be
It is hollow or solid.The bore D2 of 1 one end of blade root section, can be different, D1 > D2 in this example, such as with the bore D1 of the other end
Shown in Fig. 1, Fig. 2, wheel hub is connected with the biggish one end of bore, leaf is connected by connection changeover portion 4 with the lesser one end of bore
Root segment 1；Alternatively, the lesser one end of bore can be connected wheel hub in other examples, the biggish one end of bore is passed through into company
Changeover portion 4 is connect to connect blade root section 1；Depending on blade tip section 5, blade root section 1, the respective interface of wheel hub practical bore.
As shown in Figure 1, Figure 2, Figure 5, rectification shell is lightweight shell structure, is appointed by stickup, installation, adherency, fixation etc.
It anticipates suitable mode, is molded over the outer surface of blade root section 1.Rectifying shell includes leading edge extensional shell structure 2, rear extensional shell
Structure 3, the leading edge 12 and rear 13 of envelope blade root section 1 form a leading edge more preferably outside the cylinder 11 of blade root section 1 respectively
The 12 big thickness air foil shapes lengthened with rear 13 effectively promote blade power generation to greatly improve blade root 1 aeroperformance of section
Amount.
Cavity (the left side cavity 21 and right side cavity 22 of such as Fig. 5) can be formed inside the air foil shape of rectification shell,
Light sandwich material, such as PVC light foam material or Ba Sai wood material can be filled in the cavity.Blade root section 1
Light sandwich material is not filled in cylinder 11.
The present invention does not limit the type of attachment between the extensional shell structure of rectification shell and the cylinder 11 of blade root section 1
It is fixed, such as skeleton can be set therebetween, e.g. " I " fonts or T font master are built in rectification enclosure interior cavity
Girder construction, to support moulding, fixed structure；Alternatively, in extreme circumstances, the setting of skeleton can be cancelled, and mitigate whole weight
Amount.
The length for rectifying shell can be more than blade root section 1, to mutually should extend into wheel hub and/or blade tip section 5 in front and back
Outside, make rectify shell be directly connected to wheel hub and/or blade tip section 5, can make to connect in this way it is stronger, realize pneumatically connect
It is continuous, and prevent the erosion to blade root section 1 and blade tip section 5 and/or wheel hub connecting portion such as dust storm, rainwater.
As shown in figure 4, the connection changeover portion 4 includes local vane change device 42, flange 41 and connector, flange 41 is arranged
In the root of blade tip section 5 and blade root section 1, it is attached by connector；Local vane change device 42 is embedded in blade tip section 5 and blade root
In the interface of section 1, preferably local vane change device includes pitch variable bearings and gear, but not limited to this.
The interface of blade tip section 5 and blade root section 1, is attached in a manner of the small-bore interface embedded interface to heavy caliber
's.It can be in the heavy caliber interface that blade tip section 5 has with small-bore interface, insertion blade root section 1, then pass through connection changeover portion
4 connect blade tip section 5 with blade root section 1；Alternatively, being also possible to blade root section 1 has small-bore interface, insertion blade tip section 5 has
In heavy caliber interface, then by connecting changeover portion it connect blade tip section 5 and blade root section 1.
The length of the rectification shell and the length of cylinder 11 of blade root section 1 are not necessarily consistent, such blade tip section 5 and
The Proportionality design of blade root section 1, can more freely, and range is bigger, to adapt to more different types of blades.
Preferably, the connection changeover portion 4 between blade root section 1 and blade tip section 5 can be completely contained in rectification shell and be surrounded
Confined space in: for example, rectification shell extends to the outside of blade tip section 5 in length direction, then connect changeover portion 4 it is corresponding be located at it is whole
Enclosure interior certain distance is flowed, rainwater will not be along the seam of blade root section 1 and 5 coupling part of blade tip section when can guarantee to rain in this way
Gap penetrates into connection changeover portion 4 and blade interior, can also play more to the precise part in connection changeover portion 4 during transportation
Good protective effect, so that it be made to possess longer service life and reliability.The present invention can connected further at changeover portion 4,
Design the devices such as rain cover or windproof scrim.
The production, transport and installation of subsection blade of the present invention are illustrated below:
Blade tip section 5 produces respectively with 1 segmentation of blade root section.Wherein, blade tip section 5 can use mold, utilize traditional blade
Production technology includes the processes such as glass fiber cloth laying, form, molding, demoulding and surface treatment.
The structures such as flange, pitch variable bearings of installation connection in the root of blade tip section 5, pitch variable bearings interior can be embedded to interface
It is interior；Subsection blade can be connected and fixed using forms such as single or double bolts.
Blade root 1 structure of section is relatively simple, is cylinder or the rotary structure for being similar to cylinder, can use to it traditional
Production technology includes the processes such as laying, perfusion, molding and demoulding post-processing.
It can the structures such as matched flange and pitch variable bearings at the interface installation of blade root section 1 and blade tip section 5.
During transport of blades, fragmented transport is carried out, blade tip section 5 is separated with blade root section 1, and blade tip section 5 is using corresponding length
Transport vehicle collective conveyance, blade root section 1, which can be used, to be laid flat or the modes such as three-dimensional transport.
Aerofoil profile shape at blade root section 1 rectifies shell, and the surface of blade root section 1 is mounted on by local segmentation bonding method, that is,
Shell fragment is produced, fragment is pasted onto the surface of blade, and intermediate course is filled using light sandwich material.Alternatively, being part
Molding segmentation production, housing segments are covered on the cylinder of blade root section 1, are then consolidated using alite paste and fastening bolt
Fixed, middle part interlayer is filled with light sandwich material, is applicable in blade factory or wind field in-site installation.It preferably, is to dispatch from the factory
When, rectification shell is previously-completed with blade root section 1 and is linked and packed.
Alternatively, the production of aerofoil profile shape rectification shell can be integrally formed with blade body, and such as: in blade production link,
Since external shell plays rectified action, the density of load suffered by part is lower, and Structural strength calls are not high；It therefore, can be in blade root
During 1 production of section, 5-15 layers of glass fiber cloth laying, form are used to external rectification shell, then again with blade root section 1
Surface coating processing and post-processing are carried out together, are filled between shell and blade root section 1 with light sandwich material, it is this with leaf
The integrally formed method of piece main body, both ensure that the intensity of shell, also efficiently reduce the weight introduced by rectification shell.
Installation process:
Installation environment prepares:
1. wind regime: wind speed is less than strong breeze speed；
2. environment temperature: being not less than -10 DEG C, be not higher than 40 DEG C；
Equipment prepares: safety cap, safety belt, falling proof device, gloves, rag be several, crane, hoisting fixture, hanging belt,
Intercom, position indicator, spanner, torque spanner etc..
During the installation process, it can be lifted respectively after ground is by two sections of connections to blade integral hoisting, or to two sections:
1) blade tip section 5,1 orientation of blade root section are adjusted, face is allowed to.5 root of blade tip section is passed through into connection changeover portion 4 on ground
1 connect with blade root section, make two sections be combined into one after lifting assemble after integral blade.By this process repeat installation second and
Third branch blade.
2) blade, 1 orientation of blade root section are adjusted, face is allowed to.Lifting blade root section 1 in advance, after the completion of 1 lifting of blade root section,
Two sections, be then connected as one by the lifting for carrying out blade tip section 5 again.Installation second and third branch blade are repeated by this process.
In conclusion novel wind motor subsection blade of the invention, provides a kind of new subsection blade solution, side
Blade manufacture, transport and installation.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of novel wind motor subsection blade, which is characterized in that
Include blade tip section (5), blade root section (1), connection changeover portion (4), rectification shell；
Wherein, the blade tip section (5) connect by connection changeover portion (4) and blade root section (1) one end, blade root section (1) other end and
Wheel hub connection；The blade root section (1) is rotary structure, and the rectification shell is wrapped in the blade root section (1) outer surface
Lightweight shell structure.
2. novel wind motor subsection blade as described in claim 1, which is characterized in that
The rectification shell includes leading edge extensional shell structure (2), rear extensional shell structure (3), blade root described in difference envelope
The leading edge (12) of section (1) and rear (13), to formed on the outside of the cylinder (11) of the blade root section (1) to leading edge (12) with after
The air foil shape that edge (13) lengthens respectively.
3. novel wind motor subsection blade as claimed in claim 2, which is characterized in that
Light sandwich material is equipped between the rectification shell and blade root section (1)；The light sandwich material is light foam material
Material or Ba Sai wood material；
The blade root section (1) is hollow or solid.
4. the novel wind motor subsection blade as described in Claims 2 or 3, which is characterized in that
The length of the rectification shell is greater than the length of blade root section (1), and the rectification shell is made to extend to wheel in the longitudinal direction
The outside of hub and/or blade tip section (5), the rectification shell are directly connected to wheel hub and/or blade tip section (5).
5. the novel wind motor subsection blade as described in Claims 2 or 3, which is characterized in that
The length of the rectification shell is greater than the length of blade root section (1), and the rectification shell is made to extend to leaf in the longitudinal direction
The outside of apical segment (5), connection changeover portion (4) are included in the confined space surrounded by the rectification shell.
6. novel wind motor subsection blade as described in claim 1, which is characterized in that
The connection changeover portion (4) includes local vane change device (42), flange (41) and connector；
The root of the blade tip section (5) and blade root section (1) is attached equipped with the flange (41) matched by connector；Institute
The interface for stating blade tip section (5) and blade root section (1), is embedded with the local vane change device (42) matched.
7. novel wind motor subsection blade as claimed in claim 6, which is characterized in that
The part vane change device includes pitch variable bearings and gear；
The connector includes single or double bolt.
8. the novel wind motor subsection blade as described in claim 1 or 6 or 7, which is characterized in that
The interface bore of the blade tip section (5) is less than the interface bore of blade root section (1), and the interface of blade tip section (5) is made to be embedded in blade root
In the interface of section (1), then passing through connection changeover portion (4) connect the blade tip section (5) with blade root section (1)；
Alternatively, the interface bore of the blade tip section (5), is greater than the interface bore of blade root section (1), keep the interface of blade root section (1) embedding
In the interface for entering blade tip section (5), then passing through connection changeover portion (4) connect the blade tip section (5) with blade root section (1).
9. novel wind motor subsection blade as described in claim 1, which is characterized in that
Blade tip section (5) and blade root section (1) are produced and are transported respectively, are the integral hoistings after the assembling of ground, or point
Not Diao Zhuan after assemble again；
The blade tip section (5) is by made of glass fiber cloth laying, form, molding, demoulding, surface processing and post-processing；
The blade root section (1) is by made of glass fiber cloth laying, form, molding, demoulding, surface processing and post-processing.
10. the novel wind motor subsection blade as described in claim 1 or 9, which is characterized in that
The rectification shell is installed in blade root section (1) in factory or at wind field scene；The rectification shell includes difference
Multiple fragments of production, the fragment are separately mounted in blade root section (1)；Alternatively, the rectification shell includes locally-shaped point
Multiple housing segments of section production are covered and are connected with each other between the housing segments on blade root section (1) cylinder；
Alternatively, the rectification shell is integrally formed with blade root section (1): the rectification shell is by glass fiber cloth laying, fills
After injection forming, molding, demoulding, surface processing is carried out with the blade root section (1) and is post-processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910852688.9A CN110439743B (en) | 2019-09-10 | 2019-09-10 | Sectional blade of wind turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910852688.9A CN110439743B (en) | 2019-09-10 | 2019-09-10 | Sectional blade of wind turbine |
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| Publication Number | Publication Date |
|---|---|
| CN110439743A true CN110439743A (en) | 2019-11-12 |
| CN110439743B CN110439743B (en) | 2021-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910852688.9A Active CN110439743B (en) | 2019-09-10 | 2019-09-10 | Sectional blade of wind turbine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188727A (en) * | 2020-01-13 | 2020-05-22 | 上海电气风电集团股份有限公司 | Wind turbine blade root structure and production method thereof |
| CN113137346A (en) * | 2021-05-08 | 2021-07-20 | 上海电气风电集团股份有限公司 | Sectional type fan blade and assembling method thereof |
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| CN102011710A (en) * | 2010-11-23 | 2011-04-13 | 南京航空航天大学 | Wind machine blade |
| WO2012019611A2 (en) * | 2010-08-11 | 2012-02-16 | Vestas Wind Systems A/S | Rotor blade for a wind turbine and method of making same |
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| CN111188727B (en) * | 2020-01-13 | 2021-09-24 | 上海电气风电集团股份有限公司 | Wind turbine blade root structure and production method thereof |
| CN113137346A (en) * | 2021-05-08 | 2021-07-20 | 上海电气风电集团股份有限公司 | Sectional type fan blade and assembling method thereof |
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