CN113650321B - Manufacturing process of wind turbine blade - Google Patents

Manufacturing process of wind turbine blade Download PDF

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Publication number
CN113650321B
CN113650321B CN202110941486.9A CN202110941486A CN113650321B CN 113650321 B CN113650321 B CN 113650321B CN 202110941486 A CN202110941486 A CN 202110941486A CN 113650321 B CN113650321 B CN 113650321B
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China
Prior art keywords
web
web plate
box
die
mold
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CN202110941486.9A
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Chinese (zh)
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CN113650321A (en
Inventor
叶婷婷
李丹
陈程
徐杰
包洪兵
俞志强
管彩文
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Wuxi Wind Power Institute Co ltd
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Wuxi Wind Power Institute Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
    • B29L2031/082—Blades, e.g. for helicopters
    • B29L2031/085—Wind turbine blades
    • 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 invention relates to the technical field of wind turbine blade manufacturing, and discloses a manufacturing process of a wind turbine blade, which comprises the following steps: s1: designing a box-type main beam web plate die, a small web plate tail edge beam die and a blade shell die according to the structure of the wind turbine blade; s2, respectively manufacturing a box type girder web plate, a small web plate tail edge beam and a blade shell in a box type girder web plate die, a small web plate tail edge beam die and a blade shell die; s3: the box-type main beam web and the small web tail edge beam are arranged in the blade shell, and when the blade shell is actually used, the box-type main beam web, the small web tail edge beam and the blade shell are prefabricated in parts firstly and then are bonded and formed, so that the production efficiency of the wind turbine blade is greatly improved.

Description

Manufacturing process of wind turbine blade
Technical Field
The invention relates to the technical field of wind turbine blade manufacturing, in particular to a manufacturing process of a wind turbine blade.
Background
With the gradual consumption of non-renewable resources and in order to reduce pollution generated when the non-renewable resources are consumed, new energy sources such as solar energy, wind energy and water are continuously applied to daily life of people, so that the consumption of the non-renewable resources is reduced. China is wide in territory, many areas are high in altitude, many mountainous areas are rich in wind power, and the wind power generator is suitable for converting wind energy into electric power.
In a wind driven generator, a wind turbine blade is used as a wind energy conversion device to convert wind energy into kinetic energy of the generator, and good performance of the wind turbine blade is a determining factor for ensuring normal and stable operation of the wind driven generator set. However, in the manufacturing process of the existing wind turbine blade, a main beam, a web plate and a small web plate are respectively prefabricated, then a prefabricated main beam structure is laid in a shell laying layer, dozens of layers of tail edge beam unidirectional fiber cloth are laid at the same time, after the shell is partially cured and molded, the web plate and the small web plate are respectively stuck in the shell of the blade, so that the laying layer of the shell can be started after the main beam is produced in the whole production cycle of the wind turbine blade, and the production time is long; the problems of positioning errors, layer folding wrinkles and the like easily occur in the production process of dozens of layers of unidirectional cloth layers of the tail edge beams, so that the safety coefficient of the blade structure is reduced; in addition, when the main beam and the web plate are installed, the main beam is firstly placed in a blade shell laying layer for vacuum infusion, then the web plate and the shell are connected in a gluing mode, and the installation steps are complicated. In addition, during actual manufacturing, the main beam is a prefabricated laminated plate, the resin cannot penetrate through the prefabricated laminated plate, and the resin can only flow downwards from the side face, so that the resin is not easy to flow in the pouring process, the problem of glue accumulation or insufficient pouring below is easy to occur around the resin, and the quality of the wind turbine blade is influenced.
Disclosure of Invention
In view of the defects of the background art, the invention provides a manufacturing process of a wind turbine blade, which aims to solve the defects of the existing manufacturing process of the wind turbine blade in the background art.
In order to solve the technical problems, the invention provides the following technical scheme: a manufacturing process of a wind turbine blade comprises the following steps:
s1: designing a box-type main beam web plate die, a small web plate tail edge beam die and a blade shell die according to the structure of a wind turbine blade;
s2, respectively manufacturing a box-type main beam web plate, a small web plate tail edge beam and a blade shell in the box-type main beam web plate die, the small web plate tail edge beam die and the blade shell die;
s3: and the box-type main beam web plate and the small web plate tail edge beam are arranged in the blade shell.
In one embodiment, the step of manufacturing the box girder web in the box girder web mold in S2 is as follows:
s200: coating a release agent on the box-type girder web plate die, and waiting for the release agent to be dried;
s201: laying a flow guide net on the surface of the box girder web plate die, and fixing the periphery of the flow guide net by using sealant;
s202: laying unidirectional fiber cloth in a main beam area of the box-type main beam web plate mould, and fixing a mould plate above the unidirectional fiber cloth after laying is finished;
s203, laying specified fiber cloth and core materials in a web plate area of the box-type girder web plate mold;
s204, laying a vacuum film on the box girder web plate die, vacuumizing and pouring resin, and taking down the box girder web plate after curing and forming.
In one embodiment, the step of making the web trailing edge beam in the web trailing edge beam mold in step S2 is as follows:
s210: cleaning the small web trailing edge beam mold, coating a release agent on the small web trailing edge beam mold, and waiting for the release agent to dry;
s211: laying a flow guide net on the small web tail edge beam mould, and fixing the periphery of the flow guide net by using sealant;
s212: laying demolding cloth on the flow guide net, wherein the demolding cloth covers the whole flow guide net;
s213: laying glass fiber cloth and core materials on the demolding cloth;
s214: and paving a vacuumizing resin filling device, vacuumizing and filling resin, and waiting for curing and forming the small web tail edge beam.
In one embodiment, the blade shell mold includes an SS-side mold and a PS-side mold, the blade shell includes an SS-side shell and a PS-side shell, and the step of manufacturing the blade shell in the blade shell mold in step S2 includes the following steps:
s220: cleaning the SS surface mold and the PS surface mold, respectively coating release agents on the surfaces of the SS surface mold and the PS surface mold, and waiting for the release agents to dry;
s221: respectively paving a flow guide net on the surfaces of the SS surface mould and the PS surface mould, and fixing the periphery of the flow guide net by using sealant;
s222: paving fiber cloth and core materials in an SS surface mould and a PS surface mould according to the laying design;
s223: laying vacuum films in the SS surface mould and the PS surface mould, vacuumizing and pouring resin, and waiting for the shells in the SS surface mould and the PS surface mould to be cured and molded;
s224: and after the shells in the SS surface die and the PS surface die are solidified and molded, taking down the demolding cloth, and polishing the inner bonding surface of the shell in the SS surface grinding tool and the inner bonding surface of the shell in the PS surface grinding tool.
In one embodiment, step S3 is as follows:
s30: respectively bonding the SS surface of the web plate of the box-type main beam and the SS surface of the tail edge beam of the small web plate to a SS surface shell;
s31: respectively coating adhesives on the PS surface of the box girder web and the PS surface of the small web tail edge beam, and bonding the PS surface of the box girder web and the PS surface of the small web tail edge beam on a PS surface shell by turning over a PS surface grinding tool.
In one embodiment, in step S30, a wedge-shaped PVC block impregnated with resin is placed on the outer side of the web of the box girder web, and after the placement is completed, a first web edge strip is manufactured on the outer side of the web of the box girder web; in step S31, a wedge-shaped PVC block impregnated with resin is placed on the outer side of the small web trailing edge beam, and then a second web edge strip is produced on the outer side of the small web trailing edge beam.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the box-type main beam web, the small web tail edge beam and the blade shell are prefabricated, and in the production process, the completion of the previous process is not required to be waited for, all processes can be simultaneously unfolded, so that the production and manufacturing time of the blade is effectively shortened. The quality state that little web trailing edge roof beam can be seen in advance to prefabricated little web trailing edge roof beam ensures that little web trailing edge roof beam fills thoroughly, does not spread stress concentration points such as layer fold, and location, appearance that little web trailing edge roof beam can be guaranteed in the preparation simultaneously on solitary mould can not make mistakes, have improved the trailing edge quality of blade greatly.
Drawings
FIG. 1 is a schematic structural diagram of a wind turbine blade fabricated according to the present invention in an exemplary embodiment;
FIG. 2 is a schematic structural diagram of a box girder web manufactured in a box girder web grinding tool in the embodiment;
FIG. 3 is a schematic diagram of the construction of a lower web trailing edge beam in a lower web trailing edge beam grinding tool according to an example.
In the figure: 1. the box girder web plate, 2, the small web plate tail edge beam, 3, the SS face shell, 4, the PS face shell, 5, the SS face girder bonding glue, 6, the PS face bonding glue, 7, the tail edge bonding glue, 8, the front edge bonding glue, 9-14, the wedge PVC block, 15, the SS face small web plate tail edge beam bonding glue, 16, the PS face small web plate tail edge beam bonding glue, 17, the box girder web plate mould, 18, the small web plate tail edge beam mould, 19, the mould plate, 20, the SS face rear edge web plate edge strip, 21, the SS face front edge web plate edge strip, 22, the PS face front edge web plate edge strip, 23, the PS face rear edge web plate edge strip.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
A manufacturing process of a wind turbine blade comprises the following steps:
s1: designing a box-type main girder web plate mold 17, a small web plate tail edge beam mold 18 and a blade shell mold according to the structure of the wind turbine blade;
s2, respectively manufacturing a box type main beam web 1, a small web tail edge beam 2 and a blade shell in a box type main beam web die 17, a small web tail edge beam die 18 and a blade shell die;
s3: a box-type main beam web 1 and a small web tail edge beam 2 are arranged in the blade shell.
The blade shell in the embodiment comprises an SS surface shell 3 and a PS surface shell 4, wherein the SS surface shell 3 and the PS surface shell 4 are respectively bonded together through a tail edge bonding glue 7 and a front edge bonding glue 8.
The existing wind turbine blade manufacturing process is characterized in that a prefabricated main beam is laid in a blade shell layer, dozens of layers of unidirectional fiber cloth of a tail edge beam are laid on site, and a web plate and a lower web plate are bonded after the shell is solidified and molded, so that the whole production period is long. In the invention, the box-type main beam web is manufactured in the box-type main beam web die in advance, and the small web trailing edge beam is manufactured in the small web trailing edge beam die, so that the two parts can be manufactured at the same time, the production time is reduced, and the box-type main beam web and the small web trailing edge beam are manufactured in respective dies instead of the blade shell, so that the quality of the manufactured box-type main beam web and the manufactured small web trailing edge beam can be ensured, and the problem of insufficient pouring can be avoided.
As shown in fig. 2, in this embodiment, the step S2 of manufacturing the box-shaped girder web 1 in the girder web mold 17 includes the following steps:
s200: coating a release agent on the box-type girder web mold 17, and waiting for the release agent to dry;
s201: laying a flow guide net on the surface of the box-type main beam web plate mould 17, and fixing the periphery of the flow guide net by using sealant;
s202: laying unidirectional fiber cloth in a main beam area of a box-type main beam web plate mould 17, and fixing a mould plate above the unidirectional fiber cloth after laying is finished;
s203, laying specified fiber cloth and core materials in a web area of the box-type girder web mold 17;
s204, laying a vacuum film on the box girder web plate mould 17, vacuumizing and pouring resin, and taking down the box girder web plate after curing and forming.
The main beam area of the box-type main beam web plate die 17 refers to an area for manufacturing a main beam of the box-type main beam web plate 1, and the main beam of the box-type main beam web plate 1 refers to a part for bonding the box-type main beam web plate 1 with the SS surface shell 3 and the PS surface shell 4. The web area of the box girder web mold 17 refers to an area for manufacturing a web of the box girder web 1, and the web of the box girder web 1 refers to a part for connecting the girder in fig. 1.
In addition, the specified fiber cloth in the embodiment is not special fiber cloth, but fiber cloth selected according to the production requirements of the wind turbine blade, and different fiber cloth can be selected for wind turbine blades with different production requirements. In actual use, the core material may be PVC, PET or BALSA wood.
As shown in fig. 3, in the present embodiment, the step S2 of manufacturing the lower web trailing edge beam 2 in the lower web trailing edge beam mold 18 is as follows:
s210: cleaning the small web trailing edge beam mold 18, coating a release agent on the small web trailing edge beam mold 18, and waiting for the release agent to dry;
s211: laying a flow guide net on the small web plate tail edge beam mould 18, and fixing the periphery of the flow guide net by using sealant;
s212: laying demolding cloth on the flow guide net, wherein the demolding cloth covers the whole flow guide net;
s213: laying glass fiber cloth and a core material on the demoulding cloth;
s214: and (3) paving a vacuumizing resin filling device, vacuumizing and filling resin, and finally waiting for curing and forming of the small web tail edge beam 2.
In this embodiment, in order to manufacture the SS surface shell and the PS surface shell of the blade shell, the blade shell mold includes an SS surface mold and a PS surface mold, and the step of manufacturing the blade shell in the blade shell mold in step S2 is as follows:
s220: cleaning the SS surface mold and the PS surface mold, respectively coating a release agent on the surfaces of the SS surface mold and the PS surface mold, and waiting for the release agent to dry;
s221: respectively paving a flow guide net on the surfaces of the SS surface mould and the PS surface mould, and fixing the periphery of the flow guide net by using sealant;
s222: paving fiber cloth and core materials in an SS surface mould and a PS surface mould according to the layer design;
s223: laying vacuum films in the SS surface mould and the PS surface mould, vacuumizing and pouring resin, and waiting for the shells in the SS surface mould and the PS surface mould to be cured and molded;
s224: and after the shells in the SS surface die and the PS surface die are cured and molded, taking down the demolding cloth, and polishing the manufactured SS surface shell 3 and the manufactured PS surface shell 4.
In this embodiment, step S3 is specifically as follows:
s30: respectively bonding SS surfaces of box girder webs 1, namely girder parts of the box girder webs 1 and SS surfaces of small web tail edge beams 2 on a SS surface shell 3;
s31: respectively coating adhesives on the PS surface of the box-type main beam web 1 and the PS surface of the small web tail edge beam 2, and turning over a PS surface die to bond the PS surfaces of the box-type main beam web 1 and the small web tail edge beam with the PS surface shell 4;
in the embodiment, in step S30, wedge-shaped PVC blocks impregnated with resin are placed on the outer sides of webs of a box girder web 1, in fig. 1, wedge-shaped PVC blocks are respectively placed on the outer sides of two webs of the box girder web 1, and the four wedge-shaped PVC blocks are respectively marked with 9, 10, 11 and 12, and after the placement is completed, a first web edge strip is manufactured on the outer side of the web of the box girder web 1 to strengthen the connection between the box girder web 1 and the PS surface shell 4 and the SS surface shell 3; in FIG. 1, the first web bead comprises collectively an SS-face trailing edge web bead 20, an SS-face leading edge web bead 21, a PS-face leading edge web bead 22, and a PS-face trailing edge web bead 24; in step S31, placing the wedge-shaped PVC block 13 and the wedge-shaped PVC block 14 impregnated with resin on the outer side of the small web trailing edge beam 2, and then making a second web edge strip on the outer side of the small web trailing edge beam 2, where the second web edge strip includes a PS-surface second web edge strip 24 and an SS-surface second web edge strip 25; in one embodiment, a biaxial cloth may be selected and then hand pasted to produce the first and second web flanges, respectively. The box-type main beam web 1 and the small web tail edge beam 2 can be firmly fixed on the wind turbine blade through the wedge-shaped PVC blocks, the first web edge strip and the second web edge strip.
To sum up, when the invention is actually used, the box-type main beam web 1, the small web trailing edge beam 2 and the blade shell are respectively manufactured in the box-type main beam web mold 17, the small web trailing edge beam mold 18 and the shell mold, and the box-type main beam web 1 and the small web trailing edge beam 2 are bonded in the blade shell after the manufacture is finished, so that the production steps and the production time of the wind turbine blade are simplified, and the box-type main beam web 1 and the small web trailing edge beam 2 are formed at one time instead of firstly installing the main beam in the blade shell, then performing vacuum infusion and finally sequentially installing the main beam and the web in the blade shell in a gluing mode, so that the installation of the main beam and the web is convenient.
In light of the foregoing, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (1)

1. The manufacturing process of the wind turbine blade is characterized by comprising the following steps of:
s1: designing a box-type main beam web plate die, a small web plate tail edge beam die and a blade shell die according to the structure of a wind turbine blade;
s2, respectively manufacturing a box-type main beam web plate, a small web plate tail edge beam and a blade shell in the box-type main beam web plate die, the small web plate tail edge beam die and the blade shell die;
in the step S2, the step of manufacturing the box girder web plate in the box girder web plate die is as follows:
s200: coating a release agent on the box-type girder web plate die, and waiting for the release agent to be dried;
s201: laying a flow guide net on the surface of the box-type main beam web plate die, and fixing the periphery of the flow guide net by using sealant;
s202: laying unidirectional fiber cloth in a main beam area of the box-type main beam web plate die, and fixing a die plate above the unidirectional fiber cloth after laying is finished;
s203, laying specified fiber cloth and core materials in a web plate area of the box-type girder web plate mold;
s204, laying a vacuum film on the box girder web plate die, vacuumizing and pouring resin, and taking down the box girder web plate after curing and forming;
in the step S2, the step of manufacturing the small web trailing edge beam in the small web trailing edge beam mold is as follows:
s210: cleaning the small web trailing edge beam mold, coating a release agent on the small web trailing edge beam mold, and waiting for the release agent to dry;
s211: paving a flow guide net on the small web plate tail edge beam die, and fixing the periphery of the flow guide net by using sealant;
s212: laying demolding cloth on the flow guide net, wherein the demolding cloth covers the whole flow guide net;
s213: laying glass fiber cloth and core materials on the demolding cloth;
s214: paving vacuum-pumping resin-filling equipment, then performing vacuum-pumping and resin-filling, and finally waiting for curing and forming of the small web tail edge beam;
the blade shell mold comprises an SS surface mold and a PS surface mold, the blade shell comprises an SS surface shell and a PS surface shell, and the step S2 of manufacturing the blade shell in the blade shell mold comprises the following steps:
s220: cleaning the SS surface mold and the PS surface mold, respectively coating release agents on the surfaces of the SS surface mold and the PS surface mold, and waiting for the release agents to dry;
s221: respectively paving a flow guide net on the surfaces of the SS surface mould and the PS surface mould, and fixing the periphery of the flow guide net by using sealant;
s222: paving fiber cloth and core materials in an SS surface mould and a PS surface mould according to the laying design;
s223: laying vacuum films in the SS surface mould and the PS surface mould, vacuumizing and pouring resin, and waiting for the shells in the SS surface mould and the PS surface mould to be cured and molded;
s224: after the shells in the SS surface mold and the PS surface mold are cured and molded, taking down the demolding cloth, and respectively polishing the inner side bonding surface of the shell in the SS surface grinding tool and the inner side bonding surface of the shell in the PS surface grinding tool;
s3: installing the box-type main beam web and the small web tail edge beam in the blade shell;
step S3 is specifically as follows:
s30: respectively bonding the SS surface of the web plate of the box-type main beam and the SS surface of the tail edge beam of the small web plate on the SS surface shell; in step S30, placing a wedge-shaped PVC block soaked with resin on the outer side of a web plate of the box girder web plate, and after the placement is finished, manufacturing a first web plate edge strip on the outer side of the web plate of the box girder web plate;
s31: respectively coating an adhesive on the PS surface of the box girder web and the PS surface of the small web tail edge beam, and bonding the PS surfaces of the box girder web and the small web tail edge beam to a PS surface shell by turning over a PS surface grinding tool; in step S31, a wedge-shaped PVC block impregnated with resin is placed on the outer side of the web trailing edge beam, and then a second web edge is formed on the outer side of the web trailing edge beam.
CN202110941486.9A 2021-08-17 2021-08-17 Manufacturing process of wind turbine blade Active CN113650321B (en)

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CN113650321B true CN113650321B (en) 2023-04-07

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CN208605305U (en) * 2018-08-01 2019-03-15 国电联合动力技术(保定)有限公司 One kind is exempted to cut the box blade web structure that is flexible coupling
CN110645142B (en) * 2019-09-27 2023-09-22 明阳智慧能源集团股份公司 Modularized wind power blade not scrapped in full life cycle and manufacturing method thereof
CN111396243B (en) * 2019-11-28 2021-06-18 浙江运达风电股份有限公司 Large wind turbine blade with three-web-plate structure and assembling method

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