CN112412696B - Wind driven generator extension blade and manufacturing method thereof - Google Patents
Wind driven generator extension blade and manufacturing method thereof Download PDFInfo
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- CN112412696B CN112412696B CN202011308512.6A CN202011308512A CN112412696B CN 112412696 B CN112412696 B CN 112412696B CN 202011308512 A CN202011308512 A CN 202011308512A CN 112412696 B CN112412696 B CN 112412696B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000011162 core material Substances 0.000 claims abstract description 91
- 239000004744 fabric Substances 0.000 claims abstract description 35
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 35
- 238000003825 pressing Methods 0.000 claims description 20
- 239000004020 conductor Substances 0.000 claims description 13
- 239000003292 glue Substances 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 3
- 239000003365 glass fiber Substances 0.000 description 6
- 239000002131 composite material Substances 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 208000025274 Lightning injury Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 239000006260 foam Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
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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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- 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
- B29C70/304—In-plane lamination by juxtaposing or interleaving of plies, e.g. scarf joining
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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
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- 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
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Composite Materials (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to the field of wind power generation, in particular to an extension blade of a wind driven generator and a manufacturing method thereof. According to the invention, the first rear edge beam and the second rear edge beam as well as the first main beam and the second main beam are connected through the reinforcing cloth, so that the influence on the strength of the blade can be reduced as much as possible, the strength and the stability of the extension blade are improved, and the rear edge core material and the front edge core material are respectively connected through the lining plates, so that the strength and the stability of the extension blade can be further improved.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to an extension blade of a wind driven generator and a manufacturing method thereof.
Background
The generating efficiency of the wind generating sets is an important factor considered by each wind farm, and how to improve the efficiency of each wind generating set as much as possible needs to be considered when establishing the wind farm by a person skilled in the art. The wind turbine mainly captures wind energy by means of the wind power blade, and the length of the wind power blade directly influences the capability of the wind turbine for capturing the wind energy and the output power of the wind generating set. The length of the wind power blade is increased at low wind speed, and the generated energy of the wind turbine can be effectively improved. Therefore, the wind turbine blades which are newly developed at present are longer and longer, but the wind turbine blades which are already in service at an early stage are generally shorter, and the power generation efficiency is influenced. Against this background, it is necessary to provide a wind turbine blade tip extension structure and method.
The existing wind driven generator blade tip prolonging technology is mainly characterized in that a composite material shell is simply bonded on the basis of the existing blade structure to prolong the length of a blade, so that unfavorable construction caused by overlong bonding surfaces is easily caused, the fatigue strength is not enough due to the fact that the bonding free end is not reinforced, and the structural strength and the stability are poor and other adverse effects caused by the fact that a shear web is discontinuous along the extension direction are easily caused.
Disclosure of Invention
The invention aims to solve the technical problem that the strength and the stability of a blade tip extension structure are poor, and provides an extension blade of a wind driven generator and a manufacturing method thereof, which can improve the strength and the stability of the extension structure.
The invention relates to an extension blade of a wind driven generator, which comprises a blade body and an extension section, wherein a connection section is arranged between the blade body and the extension section, the blade body is provided with a first rear edge beam, a first rear edge core material, a first main beam and a first front edge core material, the extension section is provided with a second rear edge beam, a second rear edge core material, a second main beam and a second front edge core material, the connection section is provided with a first lining plate, a second lining plate and reinforcing cloth, two ends of the first lining plate are respectively connected with the first rear edge core material and the second rear edge core material, two ends of the second lining plate are respectively connected with the first front edge core material and the second front edge core material, and two ends of the reinforcing cloth are respectively connected with the first rear edge beam, the second rear edge beam, the first main beam and the second main beam.
Furthermore, the end parts of the first trailing edge beam and the first main beam protrude out of the end parts of the first trailing edge core material and the first leading edge core material, and the end parts of the second trailing edge beam and the second main beam protrude out of the end parts of the second trailing edge core material and the second leading edge core material.
Furthermore, the end faces of the connecting ends of the first and second trailing edge beams and the first and second main beams are inclined planes with opposite inclination directions, and the inclined planes face the outer sides of the blades.
Further, first girder in set up two first webs, set up two second webs in the second girder, set up the one end of connecting block between two second webs, the other end cooperation of connecting block is installed between two first webs.
Furthermore, the other end of the connecting block is respectively bonded with the two first webs and the first main beam.
Furthermore, the first web plate and the corresponding second web plate are overlapped through reinforcing cloth.
Furthermore, penetrating connecting holes are formed in the connecting blocks along the length direction, connecting pipes are arranged in the connecting holes, arc-shaped pressing plates are arranged in the connecting pipes, screw rods are arranged on the first web plate and/or the second web plate, one ends of the screw rods sequentially contact with the outer sides of the pressing plates through the first web plate and/or the second web plate and the connecting blocks, nuts are installed on the screw rods in a matched mode, and the nuts are in contact with the first web plate and/or the second web plate.
Furthermore, the inner hole of the connecting pipe is egg-shaped with one side having a large diameter and the other side having a small diameter, and the pressing plate is positioned on one side of the inner hole of the connecting pipe having the large diameter.
A manufacturing method of an extension blade of a wind driven generator comprises the following steps:
cutting off the blade tip of the original blade at the position of 85-90% of the length of the blade, and cutting off a first rear edge core material, a first front edge core material, a second rear edge core material and a second front edge core material with the lengths of 200-300mm at the end part;
the first trailing edge beam, the second trailing edge beam, the first main beam and the second main beam are staggered to form a slope facing the outer side of the blade, and each layer of the first trailing edge beam, the second trailing edge beam, the first main beam and the second main beam is staggered by 70-100 mm;
removing the insulating skin in the area with the length of 150mm and 100-fold at the end part of the lightning down lead in the blade body and the extension section, and smearing adhesive glue on the periphery of the connecting block;
inserting the connecting block coated with the adhesive glue on the periphery between the two first webs, then connecting the blade body and the end parts of the lightning down-leads in the extension sections in the connecting pipe, and rotating the screw rod to push the pressing plate so that the pressing plate extrudes and fixes the end parts of the two lightning down-leads;
the first web plate and the corresponding second web plate are overlapped through reinforcing cloth;
bonding two ends of a first liner plate with a first rear edge core material and a second rear edge core material respectively through bonding glue, and bonding two ends of a second liner plate with a first front edge core material and a second front edge core material respectively through bonding glue, wherein the bonding length of the first liner plate and the second liner plate is 30-50 mm;
the first rear edge beam and the second rear edge beam are overlapped, and the first main beam and the second main beam are overlapped through reinforcing cloth;
and (3) heating the lap joint area of the reinforcing cloth in an auxiliary manner to enable the TG value of the lap joint area to meet the requirement.
Further, the first rear edge beam and the second rear edge beam and the first main beam and the second main beam are lapped through the reinforcing cloth, and the lapping is carried out by adopting a vacuum leading-in process or a hand pasting process.
The invention has the advantages that the first liner plate is used for connecting the first trailing edge core material and the second trailing edge core material of the blade body and the extension section, the first front edge core material and the second front edge core material of the blade body and the extension section are connected through the second lining plate, the first and second trailing edge beams and the first and second main beams are connected by reinforcing cloth, because the first trailing edge beam and the second trailing edge beam as well as the first main beam and the second main beam are the main bearing parts in the blade and are composed of a plurality of layers of glass fiber reinforced materials, the part adopts the reinforcing cloth to connect, can minimize the influence to the blade intensity, improves the intensity and the stability of extension blade, and leading edge core material and trailing edge core material are the sandwich structure that comprises glass fiber and sandwich material, and the welt is to leading edge core material and trailing edge core material's connection, can further improve the intensity and the stability of extension blade.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of a connecting segment according to the present invention;
FIG. 3 is a schematic view of the tip of the blade body of the present invention;
FIG. 4 is a schematic view of the end of an extension segment according to the present invention;
FIG. 5 is a schematic structural view showing a connection state of the reinforcing fabric according to the present invention, in which thick lines are the reinforcing fabric and thin lines are the first and second trailing edge beams or the first and second main beams;
FIG. 6 is a cross-sectional view of an extension of the present invention;
fig. 7 is an enlarged view of part i of fig. 6.
In the figure, 1, a blade body 2, a connecting section 3, an extension section 4, a first trailing edge beam 5, a first trailing edge core material 6, a first main beam 7, a first leading edge core material 8, a second trailing edge beam 9, a second trailing edge core material 10, a second main beam 11, a second leading edge core material 12, a connecting block 13, a second web plate 14, a lightning down conductor 15, a connecting pipe 16, a pressing plate 17, a nut 18, a screw 19, a first lining plate 20, a second lining plate 21, a first web plate 22 and a connecting hole.
Detailed Description
As shown in fig. 1-7, an extension blade of a wind power generator includes a blade body 1 and an extension section 3, a connection section 2 is disposed between the blade body 1 and the extension section 3, the blade body 1 has a first trailing edge beam 4, a first trailing edge core material 5, a first main beam 6 and a first leading edge core material 7, the extension section 3 has a second trailing edge beam 8, a second trailing edge core material 9, a second main beam 10 and a second leading edge core material 11, the connection section 2 has a first lining plate 19, a second lining plate 20 and a reinforcing cloth 21, two ends of the first lining plate 19 are respectively connected with the first trailing edge core material 5 and the second trailing edge core material 9, two ends of the second lining plate 20 are respectively connected with the first leading edge core material 7 and the second leading edge core material 11, and two ends of the reinforcing cloth 21 are respectively connected with the first trailing edge beam 4 and the second trailing edge beam 8, and the first main beam 6 and the second main beam 10. The structure connects a first rear edge core material 5 and a second rear edge core material 9 of a blade body 1 and an extension section 3 through a first lining plate 19, connects a first front edge core material 7 and a second front edge core material 11 of the blade body 1 and the extension section 3 through a second lining plate 20, connects a first rear edge beam 4 and a second rear edge beam 8 as well as a first main beam 6 and a second main beam 10 through a reinforcing cloth 21, because the first rear edge beam 4 and the second rear edge beam 8 as well as the first main beam 6 and the second main beam 10 are mainly parts bearing force in the blade and are composed of a plurality of layers of glass fiber reinforcing materials, the parts are connected by the reinforcing cloth 21, the influence on the strength of the blade can be reduced as much as possible, the strength and the stability of the extension blade are improved, the front edge core material and the rear edge core material are of a sandwich structure composed of glass fibers and core materials, and the lining plates connect the front edge core material and the rear edge core material, the strength and stability of the extended blade can be further improved.
The ends of the first trailing edge beam 4 and the first main beam 6 protrude from the ends of the first trailing edge core 5 and the first leading edge core 7, and the ends of the second trailing edge beam 8 and the second main beam 10 protrude from the ends of the second trailing edge core 9 and the second leading edge core 11. After the end parts of the first rear edge beam 4, the first main beam 6, the second rear edge beam 8 and the second main beam 10 are protruded, the longest layer of the main bearing part of the blade body 1 and the extension section 3 can be butted with each other, the blade profile can be ensured when the reinforcing cloth 21 is lapped, the connection area can be shorter, the workload is reduced, and the connection strength is increased.
The end faces of the connecting ends of the first and second trailing edge beams 4 and 8 and the first and second main beams 6 and 10 are inclined planes with opposite inclination directions, and the inclined planes face the outer sides of the blades. The structure is that the inclined planes are arranged according to the stress intensity change of the inner layer and the outer layer of the blade and are connected through the reinforcing cloth 21 with the gradually-reduced length, so that the connection intensity is increased.
The other end of the connecting block 12 is respectively bonded with the two first webs 21 and the first main beam 6. The connecting block 12 can play a role of assisting in bonding the extension section 3, and further increasing the connecting strength.
The first web plate 21 and the corresponding second web plate 13 are overlapped through a reinforcing cloth 21. The reinforcing cloth 21 can further increase the connection strength by overlapping the first web 21 with the corresponding second web 13.
The existing blade tip extension structure does not provide how the original blade is connected with an extended blade tip lightning protection system, and the blade tip belongs to the main lightning stroke area of the wind driven generator blade. In order to avoid lightning strike to the blade, a through connecting hole 22 is formed in the connecting block 12 along the length direction, a connecting pipe 15 is arranged in the connecting hole 22, an arc-shaped pressing plate 16 is arranged in the connecting pipe 15, a screw 18 is arranged on the first web plate 21 and/or the second web plate 13, one end of the screw 18 sequentially passes through the first web plate 21 and/or the second web plate 13 and the connecting block 12 to be contacted with the outer side of the pressing plate 16, a nut 17 is installed on the screw 18 in a matched mode, and the nut 17 is contacted with the first web plate 21 and/or the second web plate 13. The lightning down conductor 14 in the extension section 3 is connected to the metallic aluminium blade tip placed at the blade tip. The insulating skin in the area with the length of 150mm and 100-fold of the end parts of the lightning down conductors 14 in the blade body 1 and the extension section 3 is removed, then the end parts of the lightning down conductors 14 in the blade body 1 and the extension section 3 are connected in the connecting pipe 15, the screw 18 is rotated to push the pressing plate 16, the pressing plate 16 extrudes and fixes the end parts of the two lightning down conductors 14, the connecting pipe 15 and the pressing plate 16 are made of brass, the outside of the connecting pipe 15 and the pressing plate 16 are wrapped by a layer of insulating material, and a layer of glass fiber reinforced plastics is wrapped on the connecting pipe. The screw 18, nut 17 and pressure plate 16 may be several. This arrangement enables the blade body 1 and the lightning down conductor 14 in the extension 3 to be connected by means of the threaded rods 18 and the pressure plate 16 to protect the blade from lightning strikes.
The inner hole of the connecting pipe 15 is egg-shaped with a large diameter at one side and a small diameter at the other side, and the pressing plate 16 is positioned at the large diameter side of the inner hole of the connecting pipe 15. This structure enables the pressing plate 16 to press the lightning down conductor 14 to the side of the small diameter, thereby fixing the lightning down conductor 14 firmly.
A manufacturing method of an extension blade of a wind driven generator comprises the following steps:
cutting off the blade tip of the original blade at the position of 85-90% of the blade length, and cutting off a first rear edge core material 5, a first front edge core material 7, a second rear edge core material 9 and a second front edge core material 11 with the lengths of 200-300mm at the end parts;
staggering the first and second trailing edge beams 4 and 8 and the first and second main beams 6 and 10 to form slopes facing the outer sides of the blade, wherein each of the first and second trailing edge beams 4 and 8 and the first and second main beams 6 and 10 is staggered by 70-100 mm;
removing the insulating skin in the area with the length of 150mm and 100-side ends of the lightning down conductor 14 in the blade body 1 and the extension section 3, and smearing adhesive glue around the connecting block 12;
inserting the connecting block 12 coated with the adhesive on the periphery between the two first webs 21, connecting the ends of the lightning down conductors 14 in the blade body 1 and the extension section 3 in the connecting pipe 15, rotating the screw 18 to push the pressing plate 16, and pressing and fixing the ends of the two lightning down conductors 14 by the pressing plate 16; in this way, the lightning down conductor 14 in the blade body 1 and extension section 3 can be connected by the screws 18 and the pressure plate 16 to protect the blade from lightning strikes.
The first web plate 21 and the corresponding second web plate 13 are overlapped through the reinforcing cloth 21;
bonding two ends of a first liner plate 19 with a first rear edge core material 5 and a second rear edge core material 9 respectively through bonding glue, bonding two ends of a second liner plate 20 with a first front edge core material 7 and a second front edge core material 11 respectively through bonding glue, wherein the bonding length of the first liner plate 19 and the second liner plate 20 is 30-50 mm;
the first rear edge beam 4 and the second rear edge beam 8 and the first main beam 6 and the second main beam 10 are overlapped through reinforcing cloth 21; the inclined planes are arranged according to the stress intensity change of the inner layer and the outer layer of the blade and are connected through the reinforcing cloth 21 with the gradually-reduced length, so that the connection intensity is increased.
The lap joint region of the reinforcing fabric 21 is heated in an auxiliary manner so that the TG value of the lap joint region satisfies the requirement.
The first rear edge beam 4 and the second rear edge beam 8 and the first main beam 6 and the second main beam 10 are lapped through the reinforcing cloth 21 by adopting a vacuum leading-in process or a hand pasting process.
In the method, the first rear edge core material 5 and the second rear edge core material 9 of the blade body 1 and the extension section 3 are connected through the first lining plate 19, the first front edge core material 7 and the second front edge core material 11 of the blade body 1 and the extension section 3 are connected through the second lining plate 20, the first rear edge beam 4 and the second rear edge beam 8 as well as the first main beam 6 and the second main beam 10 are connected through the reinforcing cloth 21, because the first rear edge beam 4 and the second rear edge beam 8 as well as the first main beam 6 and the second main beam 10 are mainly stressed components in the blade and are composed of a plurality of layers of glass fiber reinforcing materials, the parts are connected through the reinforcing cloth 21, the influence on the strength of the blade can be reduced as much as possible, the strength and the stability of the extension blade are improved, the front edge core material and the rear edge core material are of a sandwich structure composed of glass fibers and clamps, and the lining plates are connected with the front edge core material and the rear edge core material, the strength and stability of the extended blade can be further improved. After the end parts of the first rear edge beam 4, the first main beam 6, the second rear edge beam 8 and the second main beam 10 are protruded, the longest layer of the main bearing part of the blade body 1 and the extension section 3 can be butted with each other, the blade profile can be ensured when the reinforcing cloth 21 is lapped, the connection area can be shorter, the workload is reduced, and the connection strength is increased.
Claims (6)
1. An extension blade for a wind turbine, comprising: the novel blade comprises a blade body (1) and an extension section (3), wherein a connecting section (2) is arranged between the blade body (1) and the extension section (3), the blade body (1) is provided with a first rear edge beam (4), a first rear edge core material (5), a first main beam (6) and a first front edge core material (7), the extension section (3) is provided with a second rear edge beam (8), a second rear edge core material (9), a second main beam (10) and a second front edge core material (11), the connecting section (2) is provided with a first lining plate (19), a second lining plate (20) and reinforcing cloth (21), two ends of the first lining plate (19) are respectively connected with the first rear edge core material (5) and the second rear edge core material (9), two ends of the front edge of the second lining plate (20) are respectively connected with the first front edge core material (7) and the second front edge core material (11), two ends of the reinforcing cloth (21) are respectively connected with the first rear edge beam (4), the second rear edge beam (8), the first main beam (6) and the second main beam (10); the end parts of the first rear edge beam (4) and the first main beam (6) are protruded out of the end parts of the first rear edge core material (5) and the first front edge core material (7), and the end parts of the second rear edge beam (8) and the second main beam (10) are protruded out of the end parts of the second rear edge core material (9) and the second front edge core material (11); the end faces of the connecting ends of the first rear edge beam (4) and the second rear edge beam (8) and the first main beam (6) and the second main beam (10) are inclined planes with opposite inclination directions, and the inclined planes face the outer sides of the blades; two first webs (21) are arranged in the first main beam (6), two second webs (13) are arranged in the second main beam (10), one end of a connecting block (12) is arranged between the two second webs (13), and the other end of the connecting block (12) is installed between the two first webs (21) in a matched mode; connecting block (12) in set up penetrating connecting hole (22) along length direction, set up connecting pipe (15) in connecting hole (22), set up curved clamp plate (16) in connecting pipe (15), set up screw rod (18) on first web (21) and/or second web (13), the one end of screw rod (18) is in proper order through first web (21) and/or second web (13), and connecting block (12), and touch the outside of clamp plate (16) mutually, cooperation installation nut (17) on screw rod (18), nut (17) touch with first web (21) and/or second web (13).
2. An extended wind turbine blade according to claim 1, wherein: the other end of the connecting block (12) is respectively bonded with the two first webs (21) and the first main beam (6).
3. An extended wind turbine blade according to claim 2, wherein: the first web plate (21) is overlapped with the corresponding second web plate (13) through a reinforcing cloth (21).
4. An extended wind turbine blade according to claim 1, wherein: the inner hole of the connecting pipe (15) is egg-shaped with a large diameter at one side and a small diameter at the other side, and the pressing plate (16) is positioned at one side of the large diameter of the inner hole of the connecting pipe (15).
5. A method of manufacturing an extended blade for a wind turbine according to claim 4, wherein: the method comprises the following steps:
cutting off the blade tip of the original blade at the position of 85-90% of the blade length, and cutting off a first rear edge core material (5), a first front edge core material (7), a second rear edge core material (9) and a second front edge core material (11) with the lengths of 200-300mm at the end part;
staggering the first trailing edge beam (4) and the second trailing edge beam (8) and the first main beam (6) and the second main beam (10) to form a slope facing the outer side of the blade, wherein each layer of the first trailing edge beam (4) and the second trailing edge beam (8) and the first main beam (6) and the second main beam (10) is staggered by 70-100 mm;
removing the insulating skin in the 100-mm length area of the end part of the lightning down conductor (14) in the blade body (1) and the extension section (3), and coating adhesive glue on the periphery of the connecting block (12);
inserting the connecting blocks (12) coated with the bonding glue on the periphery between the two first webs (21), then connecting the ends of the lightning down wires (14) in the blade body (1) and the extension section (3) in the connecting pipe (15), and rotating the screw (18) to push the pressing plate (16) so that the pressing plate (16) extrudes and fixes the ends of the two lightning down wires (14);
the first web plate (21) is overlapped with the corresponding second web plate (13) through a reinforcing cloth (21);
bonding two ends of a first liner plate (19) with a first rear edge core material (5) and a second rear edge core material (9) through bonding glue respectively, bonding two ends of a second liner plate (20) with a first front edge core material (7) and a second front edge core material (11) through bonding glue respectively, wherein the bonding length of the first liner plate (19) and the second liner plate (20) is 30-50 mm;
the first rear edge beam (4) and the second rear edge beam (8) and the first main beam (6) and the second main beam (10) are overlapped through reinforcing cloth (21);
the lap joint area of the reinforcing cloth (21) is heated in an auxiliary manner, so that the TG value of the lap joint area meets the requirement.
6. The method of manufacturing of claim 5, wherein: the first rear edge beam (4) and the second rear edge beam (8) and the first main beam (6) and the second main beam (10) are overlapped through the reinforcing cloth (21), and the overlapping is carried out by adopting a vacuum leading-in process or a hand pasting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011308512.6A CN112412696B (en) | 2020-11-20 | 2020-11-20 | Wind driven generator extension blade and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011308512.6A CN112412696B (en) | 2020-11-20 | 2020-11-20 | Wind driven generator extension blade and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112412696A CN112412696A (en) | 2021-02-26 |
| CN112412696B true CN112412696B (en) | 2021-09-10 |
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| CN115596604B (en) * | 2022-10-19 | 2023-04-14 | 新创碳谷集团有限公司 | Multi-web structure modularized wind power blade |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101493069A (en) * | 2007-12-27 | 2009-07-29 | 通用电气公司 | Adaptive rotor blade for a wind turbine |
| CN111794902A (en) * | 2019-04-03 | 2020-10-20 | 西门子歌美飒可再生能源公司 | Wind turbine blade and wind turbine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101493069A (en) * | 2007-12-27 | 2009-07-29 | 通用电气公司 | Adaptive rotor blade for a wind turbine |
| CN111794902A (en) * | 2019-04-03 | 2020-10-20 | 西门子歌美飒可再生能源公司 | Wind turbine blade and wind turbine |
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