CN103470456A - Sectional wind power generation blade with interchangeability - Google Patents
Sectional wind power generation blade with interchangeability Download PDFInfo
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- CN103470456A CN103470456A CN2013104350141A CN201310435014A CN103470456A CN 103470456 A CN103470456 A CN 103470456A CN 2013104350141 A CN2013104350141 A CN 2013104350141A CN 201310435014 A CN201310435014 A CN 201310435014A CN 103470456 A CN103470456 A CN 103470456A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention relates to a sectional wind power generation blade with interchangeability, which is used for solving the problem that a large wind power generation blade is difficult in manufacturing, transportation and installation. The sectional wind power generation blade with the interchangeability comprises a first blade section, a first metal connection component, a second metal connection component, a second blade section and a maintenance cover plate, wherein the first blade section and the first metal connection component are of an integrated structure, the right end of the first metal connection component and the left end of the second metal connection component are assembled in a matching manner, the second metal connection component and the second blade section are of an integrated structure, and the maintenance cover plate is arranged at the assembled position of the first metal connection component and the second metal connection component. According to the sectional wind power generation blade with the interchangeability, the manufacturing difficulty of the large wind power generation blade and the transportation cost are reduced, the assembly efficiency of the sectional wind power generation blade is improved, and meanwhile the maintenance cost of the sectional wind power generation blade is saved.
Description
Technical field
The present invention relates to a kind of wind power generation blade, especially a kind of linkage structure of segmented wind power generation blade, belong to technical field of wind power generation.
Background technique
Along with the modern fast development of industrialization, people are to the demand of the energy also at rapid growth, and conflicting with it is the minimizing increasingly of the fossil energy reserves such as coal, oil and natural gas, and has the serious environment pollution problem in the fossil energy consumption process.Wind-power electricity generation was developed rapidly in countries in the world in the last few years with its environmental protection, safety and the advantage such as renewable, and China's wind-powered electricity generation total installation of generating capacity in 2010 has surpassed the U.S., becomes the wind-powered electricity generation big country of electric motor power first.
At present, the wind-powered electricity generation unit maximizes has become a kind of trend of Wind Power Development, and wind power generation blade is the critical component that obtains wind energy of wind-powered electricity generation unit, and blade dimensions and aerodynamic configuration thereof are the key factors that determines the wind-power electricity generation acc power.Existing maximum blade length dimension has surpassed 60m, and the 90 m blades that are greater than that Britain is building and testing can be used for the wind-driven generator that generating capacity is 8～10MW.But, the wind power generating blade chip size increases the difficulty increasing that makes blade manufacture, also brought transportation and a difficult problem has been installed when cost of production significantly improves, someone sectional-type blade that begins one's study for this reason, but existing sectional-type blade linkage structure complexity, exchange poor performance, blade positioning precision and repetitive positioning accuracy are lower, can not guarantee the reliable running of blade.
Chinese patent application CN 102518568 A have announced a kind of wind power sectional-type blade, and described blade at least forms with two sections blades, and each blade sections connects into integral body by connector element.But also there is following defect in technique scheme: 1, the exposed aerodynamic configuration that has affected blade in blade exterior of link, connecting bolt and nut, and then affected the blade aerodynamic characteristic; 2, link, connecting bolt and nut get rusty under the long-term effect of exposing to the weather, drenching with rain, and affect the blade join strength; 3, connect location between the blade upper-lower section and forbidden, make alignment error strengthen; 4, connecting bolt is stressed is sheared, and the stress can bear is subject to severely restricts.
In addition, Chinese patent application CN 102635514A has announced a kind of large-scale wind electricity unit sectional-type blade and attaching method thereof, its structure is as follows: described invention becomes two sections by blade design, bury in advance and put Deformed Steel Bars in the joint blade shell of every section, while Deformed Steel Bars exposed portions serve length, two sections blade joint section Deformed Steel Bars lap positions want corresponding good, after blade section is transported to the whole machine installation scene, utilize frock that two sections blades are adjusted to desirable relative position, then utilizing prefabricated blade inner formword to carry out scene with the material identical with its mother metal pastes, blade is coupled together.But also there is following shortcoming in technique scheme: 1, the on-the-spot installation of blade needs frock to adjust the position of Deformed Steel Bars, and the bad assurance of positioning precision and efficiency are lower; 2, two blade sections are welded to connect into wholely by Deformed Steel Bars, and attachment portion also needs corresponding mould to carry out scene to paste the attachment portion profile, and installation efficiency is lower; Once 3 blade local damages are serious, the blade upper-lower section can not be changed separately, and blade is scrapped whole, is unfavorable for the maintenance of blade, makes the maintenance and repair cost strengthen.
In sum, there is the blade connection structure complexity in existing sectional-type blade, exchanges poor performance, and blade positioning precision and repetitive positioning accuracy are lower, and installation efficiency is low, can not guarantee the technical problem of the reliable running of blade.
Summary of the invention
The object of the invention is to the drawback for prior art, provide a kind of and be convenient to transportation and install, exchange the segmented wind power generation blade with interchangeability that performance is good, positioning precision is high.
Problem of the present invention realizes with following technical proposals:
A kind of segmented wind power generation blade with interchangeability, it comprises the first blade sections, the first metal connecting piece, the second metal connecting piece, the second blade sections and safeguards cover plate, described the first blade sections and the first metal connecting piece are the integral type structure, described the first metal connecting piece right-hand member and the second metal connecting piece left end are equipped, described the second metal connecting piece and the second blade sections are the integral type structure, at the first metal connecting piece and second metal connecting piece rigging position place's installation and maintenance cover plate.
The above-mentioned segmented wind power generation blade with interchangeability, described the first metal connecting piece outer surface and blade aerodynamic configuration coupling, right-hand member at the first metal connecting piece is provided with the grafting piece mated with the second metal connecting piece, the first metal connecting piece pin hole and the first metal connecting piece articulation bolt hole are set on the grafting piece, described the first metal connecting piece pin hole is the up/down perforation structure, and described the first metal connecting piece articulation bolt hole is axial communicating structure.
The above-mentioned segmented wind power generation blade with interchangeability, described the first metal connecting piece left end is provided with the pre-buried contiguous block of the first metal connecting piece with the first blade sections coupling, the pre-buried contiguous block of described the first metal connecting piece is cavity structure, on the pre-buried contiguous block outer wall of the first metal connecting piece, one group of square threaded form groove is set.
The above-mentioned segmented wind power generation blade with interchangeability, described the second metal connecting piece outer surface and blade aerodynamic configuration coupling, left end at the second metal connecting piece is provided with the inserting groove mated with the first metal connecting piece, the second metal connecting piece pin hole and the second metal connecting piece articulation bolt hole are set on the inserting groove sidewall, described the second metal connecting piece pin hole is the up/down perforation structure, and described the second metal connecting piece articulation bolt hole is axial communicating structure.
The above-mentioned segmented wind power generation blade with interchangeability, described the second metal connecting piece right-hand member is provided with the pre-buried contiguous block of the second metal connecting piece with the second blade sections coupling, the pre-buried contiguous block of described the second metal connecting piece is cavity structure, on the pre-buried contiguous block outer wall of the second metal connecting piece, one group of square threaded form groove is set.
The above-mentioned segmented wind power generation blade with interchangeability, the described aerodynamic configuration coupling of safeguarding cover plate outer surface and blade, it is by attachment screw and the first metal connecting piece and the assembling of the second metal connecting piece.
The present invention coordinates with the second metal connecting piece inserting groove by the first metal connecting piece grafting piece, link is provided with fitting surface and locating face, link can guarantee to connect gap after connecting and the joint step is less than 0.02mm, the cover plate place not there will be contrary air-flow step, the favorable current step is less than 0.02mm, has greatly improved the positioning precision of segmented wind power generation blade linkage structure; The present invention is divided into two sections or multistage by large-scale blade, and has interchangeability, and corresponding mould is reduced greatly, and mould and lifting clamping device become greatly to reduce, and the cost of transportation of blade also descends greatly simultaneously.The present invention adopts the hinged bolts assembly that the first metal connecting piece and the second metal connecting piece are fastenedly connected, and assembling and the dismounting of the segmented of being more convenient for wind power generation blade, improved efficiency of assembling, makes installation cost greatly reduce simultaneously; The present invention is processed as by the first metal connecting piece and the second metal connecting piece outer surface the curved surface mated with the wind power generation blade aerodynamic configuration by numerical control machine tool equipment, avoided wind power generation blade when assembling moulding jointing aerofoil profile again again, the on-the-spot mould location of announcing compared with Chinese patent application CN 102635514A, the technological scheme that scene pastes, further improved packaging efficiency.Of the present inventionly safeguard that cover plate, by demountable structure and the first metal connecting piece and the assembling of the second metal connecting piece, has facilitated the maintenance of blade connection structure; The present invention can change separately blade tip or the blade root of wind power generation blade, has improved the exchange performance, thereby greatly reduces the maintenance cost of wind power generation blade.The first metal connecting piece 2 is mainly to coordinate and positioning action for being connected first, second blade sections and playing in connection procedure with the second metal connecting piece 3, to guarantee that the blade linkage section connects precision, guarantee that gap, joint and step are less than 0.02mm, be the square threaded form shape inside and outside link and blade sections joint, can guarantee the Joint strength with the blade sections composite material.In a word, the present invention has not only reduced the manufacture difficulty of large scale wind power generation blade, has reduced cost of transportation, and has improved interchangeability and the efficiency of assembling of segmented wind power generation blade, has saved the maintenance cost of wind power generation blade simultaneously.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is the blast structural drawing of Fig. 1;
Fig. 3 is the first metal connecting piece structural representation;
Fig. 4 is the second metal connecting piece structural representation;
Fig. 5 is that the present invention passes through hinged bolts assembled schematic diagram;
Fig. 6 is A-A cross-sectional view in Fig. 5;
Fig. 7 is that the present invention assembles schematic diagram by pin;
Fig. 8 is B-B cross-sectional view in Fig. 7;
Fig. 9 is that the present invention passes through hinged bolts assembly and pin assembling schematic diagram;
Figure 10 is C-C cross-sectional view in Fig. 9.
In figure, each list of reference numerals is: 1, the first blade sections, 2, the first metal connecting piece, 2-1, the grafting piece, 2-2, the pre-buried contiguous block of the first metal connecting piece, 2-3, the first metal connecting piece pin hole, 2-4, the first metal connecting piece articulation bolt hole, 3, the second metal connecting piece, 3-1, inserting groove, 3-2, the pre-buried contiguous block of the second metal connecting piece, 3-3, the second metal connecting piece articulation bolt hole, 3-4, the second metal connecting piece articulation pin hole, 4, the second blade sections, 5, safeguard cover plate, 6, fastening screw trip bolt, 7, the hinged bolts assembly, 8, pin.
Embodiment
Referring to Fig. 1, Fig. 2, the present invention includes the first blade sections 1, the first metal connecting piece 2, the second metal connecting piece 3, the second blade sections 4 and safeguard cover plate 5, described the first blade sections 1 and the first metal connecting piece 2 are the integral type structure, described the first metal connecting piece 2 right-hand members and the second metal connecting piece 3 left ends are equipped, described the second metal connecting piece 3 and the second blade sections 4 are the integral type structure, rigging position place installation and maintenance cover plate 5 at the first metal connecting piece 2 and the second metal connecting piece 3, the described aerodynamic configuration coupling of safeguarding cover plate 5 outer surfaces and blade, it is by attachment screw 6 and the first metal connecting piece 2 and the second metal connecting piece 3 assemblings.
Referring to Fig. 3, the first metal connecting piece 2 outer surfaces of the present invention and blade aerodynamic configuration coupling, right-hand member at the first metal connecting piece 2 is provided with the grafting piece 2-1 mated with the second metal connecting piece, the first metal connecting piece pin hole 2-3 and the first metal connecting piece articulation bolt hole 2-4 are set on grafting piece 2-1, described the first metal connecting piece pin hole 2-3 is the up/down perforation structure, and described the first metal connecting piece articulation bolt hole 2-4 is axial communicating structure; Be provided with the pre-buried contiguous block 2-2 of the first metal connecting piece mated with the first blade sections 1 at the first metal connecting piece 2 left ends, the pre-buried contiguous block 2-2 of described the first metal connecting piece is cavity structure, on the pre-buried contiguous block 2-2 of the first metal connecting piece outer wall, one group of square threaded form groove is set.
Referring to Fig. 4, the second metal connecting piece 3 outer surfaces of the present invention and blade aerodynamic configuration coupling, left end at the second metal connecting piece 3 is provided with the inserting groove 3-1 mated with the first metal connecting piece, the second metal connecting piece pin hole 3-4 and the second metal connecting piece articulation bolt hole 3-3 are set on inserting groove 3-1 sidewall, described the second metal connecting piece pin hole 3-4 is the up/down perforation structure, and described the second metal connecting piece articulation bolt hole 3-3 is axial communicating structure; Be provided with the pre-buried contiguous block 3-2 of the second metal connecting piece mated with the second blade sections 4 at the second metal connecting piece 3 right-hand members, the pre-buried contiguous block 3-2 of described the second metal connecting piece is cavity structure, on the pre-buried contiguous block 3-2 of the second metal connecting piece outer wall, one group of square threaded form groove is set.
Referring to Fig. 5, Fig. 6, it shown in figure, is first specific embodiment of the present invention, wind power generation blade at least is divided into two sections, at first the first metal connecting piece 2 and the second metal connecting piece 3 are coordinated to processing, the grafting piece 2-1 of the first metal connecting piece 2 and the inserting groove 3-1 of the second metal connecting piece 3 are mated mutually, the first metal connecting piece articulation bolt hole 2-4 is set on the grafting piece 2-1 of the first metal connecting piece 2, the second metal connecting piece articulation bolt hole 3-3 is set on the inserting groove 3-1 of the second metal connecting piece 3 sidewall; Then the first metal connecting piece 2 and the second metal connecting piece 3 are navigated to respectively on the shaping die of the first blade sections 1, the second blade sections 4, on the pre-buried contiguous block of the second metal connecting piece of the pre-buried contiguous block of the first metal connecting piece of the first metal connecting piece 2 and the second metal connecting piece 3, utilize epoxy resin to glued joint glass fibre or carbon fibre cloth, the first blade sections 1 and the first metal connecting piece 2, the second blade sections 4 and the second metal connecting piece 3 are become one; Assembling hinged bolts assembly 7 in the first metal connecting piece articulation bolt hole 2-4 axially offered and the second metal connecting piece articulation bolt hole 3-3, the first metal connecting piece 2 and the second metal connecting piece 3 are linked together, and such the first blade sections 1 and the second blade sections 4 link into an integrated entity; Finally by fastening screw trip bolt 6, will safeguard that cover plate 5 is fixed on the first metal connecting piece 2 and the second metal connecting piece 3, forms complete wind power generation blade.It is thinner that the present embodiment is applicable to aerofoil profile, the assembling of the wind power generation blade that generator power is less.The first metal connecting piece 2 and the second metal connecting piece 3 are mainly for being connected the one the second blade sections, playing in connection procedure by coordinating and positioning action.Be the square threaded form shape inside and outside link link and blade sections joint, increased the area of contact of composite material and link, with the Joint strength of assurance and blade sections composite material.Bolt 7 effects are that blade sections 1 and blade sections 2 are tightened to one by metal connecting piece, clamping bolt section section has lock nut and check washer to be used for preventing that nut from unclamping, clamping bolt 7 exhibition of mainly bearing is to tensile stress and part shearing stress, bolt 8 mainly bears shearing stress, bears bending stress between metal connecting piece.Location shape face in prior art is composite material blade profile location, and positioning precision is not high, and efficiency is lower, does not possess in interchangeability.
Referring to Fig. 7, Fig. 8, shown in figure, be second specific embodiment of the present invention, wind power generation blade at least is divided into two sections, at first the first metal connecting piece 2 and the second metal connecting piece 3 are coordinated to processing, the grafting piece 2-1 of the first metal connecting piece 2 and the inserting groove 3-1 of the second metal connecting piece 3 are mated mutually, the first metal connecting piece pin hole 2-3 is set on the grafting piece 2-1 of the first metal connecting piece 2, the second metal connecting piece pin hole 3-4 is set on the inserting groove 3-1 of the second metal connecting piece 3 sidewall; Then the first metal connecting piece 2 and the second metal connecting piece 3 are navigated to respectively on the shaping die of the first blade sections 1, the second blade sections 4, on the pre-buried contiguous block of the second metal connecting piece of the pre-buried contiguous block of the first metal connecting piece of the first metal connecting piece 2 and the second metal connecting piece 3, utilize epoxy resin to glued joint glass fibre or carbon fibre cloth, the first blade sections 1 and the first metal connecting piece 2, the second blade sections 4 and the second metal connecting piece 3 are become one; Assembling pin 8 in the first metal connecting piece pin hole 2-3 offered at above-below direction and the second metal connecting piece pin hole 3-4, the first metal connecting piece 2 and the second metal connecting piece 3 are linked together, and such the first blade sections 1 and the second blade sections 4 link into an integrated entity; Finally by fastening screw trip bolt 6, will safeguard that cover plate 5 is fixed on the first metal connecting piece 2 and the second metal connecting piece 3, forms complete wind power generation blade.In the present embodiment, pin 8 bears shearing force, is applicable to the assembling of stressed less blade of wind-driven generator.
Referring to Fig. 9, Figure 10, shown in figure, be the 3rd specific embodiment of the present invention, wind power generation blade at least is divided into two sections, at first the first metal connecting piece 2 and the second metal connecting piece 3 are coordinated to processing, the grafting piece 2-1 of the first metal connecting piece 2 and the inserting groove 3-1 of the second metal connecting piece 3 are mated mutually, the first metal connecting piece pin hole 2-3 and the first metal connecting piece articulation bolt hole 2-4 are set on the grafting piece 2-1 of the first metal connecting piece 2, the second metal connecting piece pin hole 3-4 and the second metal connecting piece articulation bolt hole 3-3 are set on the inserting groove 3-1 of the second metal connecting piece 3 sidewall, then the first metal connecting piece 2 and the second metal connecting piece 3 are navigated to respectively on the shaping die of the first blade sections 1, the second blade sections 4, on the pre-buried contiguous block of the second metal connecting piece of the pre-buried contiguous block of the first metal connecting piece of the first metal connecting piece 2 and the second metal connecting piece 3, utilize epoxy resin to glued joint glass fibre or carbon fibre cloth, the first blade sections 1 and the first metal connecting piece 2, the second blade sections 4 and the second metal connecting piece 3 are become one, assembling hinged bolts assembly 7 in the first metal connecting piece articulation bolt hole 2-4 axially offered and the second metal connecting piece articulation bolt hole 3-3, assembling pin 8 in the first metal connecting piece pin hole 2-3 offered at above-below direction and the second metal connecting piece pin hole 3-4, by one group of hinged bolts assembly 7 and one group of pin 8, the first metal connecting piece 2 and the second metal connecting piece 3 are linked together, and such the first blade sections 1 and the second blade sections 4 link into an integrated entity, finally by fastening screw trip bolt 6, will safeguard that cover plate 5 is fixed on the first metal connecting piece 2 and the second metal connecting piece 3, forms complete wind power generation blade.The present embodiment is applicable to the assembling to power large wind generator blade.
Claims (6)
1. the segmented wind power generation blade with interchangeability, it is characterized in that, it comprises the first blade sections (1), the first metal connecting piece (2), the second metal connecting piece (3), the second blade sections (4) and safeguard cover plate (5), described the first blade sections (1) is the integral type structure with the first metal connecting piece (2), described the first metal connecting piece (2) right-hand member and the second metal connecting piece (3) left end are equipped, described the second metal connecting piece (3) is the integral type structure with the second blade sections (4), rigging position place installation and maintenance cover plate (5) at the first metal connecting piece (2) with the second metal connecting piece (3).
2. a kind of segmented wind power generation blade with interchangeability according to claim 1, it is characterized in that, described the first metal connecting piece (2) outer surface and blade aerodynamic configuration coupling, right-hand member at the first metal connecting piece (2) is provided with the grafting piece (2-1) mated with the second metal connecting piece, the first metal connecting piece pin hole (2-3) and the first metal connecting piece articulation bolt hole (2-4) are set on grafting piece (2-1), described the first metal connecting piece pin hole (2-3) is the up/down perforation structure, described the first metal connecting piece articulation bolt hole (2-4) is axial communicating structure.
3. a kind of segmented wind power generation blade with interchangeability according to claim 2, it is characterized in that, described the first metal connecting piece (2) left end is provided with the pre-buried contiguous block of the first metal connecting piece (2-2) with the first blade sections (1) coupling, the pre-buried contiguous block of described the first metal connecting piece (2-2) is cavity structure, on the pre-buried contiguous block of the first metal connecting piece (2-2) outer wall, one group of square threaded form groove is set.
4. according to claim 1 or 2 or 3 described a kind of segmented wind power generation blades with interchangeability, it is characterized in that, described the second metal connecting piece (3) outer surface and blade aerodynamic configuration coupling, left end at the second metal connecting piece (3) is provided with the inserting groove (3-1) mated with the first metal connecting piece, the second metal connecting piece pin hole (3-4) and the second metal connecting piece articulation bolt hole (3-3) are set on inserting groove (3-1) sidewall, described the second metal connecting piece pin hole (3-4) is the up/down perforation structure, described the second metal connecting piece articulation bolt hole (3-3) is axial communicating structure.
5. a kind of segmented wind power generation blade with interchangeability according to claim 4, it is characterized in that, described the second metal connecting piece (3) right-hand member is provided with the pre-buried contiguous block of the second metal connecting piece (3-2) with the second blade sections (4) coupling, the pre-buried contiguous block of described the second metal connecting piece (3-2) is cavity structure, on the pre-buried contiguous block of the second metal connecting piece (3-2) outer wall, one group of square threaded form groove is set.
6. a kind of segmented wind power generation blade with interchangeability according to claim 5, it is characterized in that, the described aerodynamic configuration coupling of safeguarding cover plate (5) outer surface and blade, it is by attachment screw (6) and the first metal connecting piece (2) and the second metal connecting piece (3) assembling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310435014.1A CN103470456B (en) | 2013-09-23 | 2013-09-23 | A kind of segmented wind power generation blade with interchangeability |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310435014.1A CN103470456B (en) | 2013-09-23 | 2013-09-23 | A kind of segmented wind power generation blade with interchangeability |
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| CN103470456A true CN103470456A (en) | 2013-12-25 |
| CN103470456B CN103470456B (en) | 2016-04-13 |
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| CN111692050A (en) * | 2020-07-01 | 2020-09-22 | 上海电气风电集团股份有限公司 | Connecting assembly and fan blade comprising same |
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| CN106438192A (en) * | 2015-08-07 | 2017-02-22 | 中材科技风电叶片股份有限公司 | Sectional type wind power generation blade connecting structure and method |
| CN113757035A (en) * | 2020-06-04 | 2021-12-07 | 乌鲁木齐金风天翼风电有限公司 | Sectional type blade, manufacturing method thereof and wind generating set |
| CN111692050A (en) * | 2020-07-01 | 2020-09-22 | 上海电气风电集团股份有限公司 | Connecting assembly and fan blade comprising same |
| CN111927699A (en) * | 2020-07-28 | 2020-11-13 | 杭州盛通科技有限公司 | Segmented connected wind driven generator impeller |
| CN116215592A (en) * | 2023-03-24 | 2023-06-06 | 新创碳谷集团有限公司 | Connection structure, connection method and railway traffic vehicle body |
| CN116215592B (en) * | 2023-03-24 | 2023-10-17 | 新创碳谷集团有限公司 | Connection structure, connection method and railway traffic vehicle body |
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| CN103470456B (en) | 2016-04-13 |
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