CN112879248A - Lightning protection structure for lightning protection branch point and pre-bending position of wind power blade and manufacturing method - Google Patents

Lightning protection structure for lightning protection branch point and pre-bending position of wind power blade and manufacturing method Download PDF

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Publication number
CN112879248A
CN112879248A CN202110309195.8A CN202110309195A CN112879248A CN 112879248 A CN112879248 A CN 112879248A CN 202110309195 A CN202110309195 A CN 202110309195A CN 112879248 A CN112879248 A CN 112879248A
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China
Prior art keywords
lightning
branch point
main
conductor
lightning conductor
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CN202110309195.8A
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Chinese (zh)
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CN112879248B (en
Inventor
刘梅
周杰
巨娜
刘广
张莉花
赵亚男
何占启
程朗
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Guoneng United Power Technology Baoding Co ltd
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Guodian United Power Technology Baoding Co Ltd
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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
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/30—Lightning protection
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/70—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by moulding
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B29C65/7805—Positioning the parts to be joined, e.g. aligning, indexing or centring the parts to be joined comprising positioning features
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • 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
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/681—Component parts, details or accessories; Auxiliary operations
    • 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
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/82—Forcing wires, nets or the like partially or completely into the surface of an article, e.g. by cutting and pressing
    • 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
    • B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
    • B29C70/882—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding
    • B29C70/885—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding with incorporated metallic wires, nets, films or plates
    • 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
    • F03D1/0608—Rotors characterised by their aerodynamic shape
    • F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Wind Motors (AREA)

Abstract

The invention discloses a lightning protection structure for a lightning protection branch point and a pre-bending position of a wind power blade and a manufacturing method thereof, wherein the lightning protection structure is arranged on a rear edge web structural layer and comprises the following steps: the main lightning conductor is in a horizontal state and a bending state in a subsection mode, the lightning branch point and the pre-bending position are located on the main lightning conductor in the bending state, and the branch lightning conductor is connected to the lightning branch point on the main lightning conductor; the lightning conductor reinforcing cloth is laid on the main lightning conductor in a horizontal state; and the supporting block is arranged between the trailing edge web structural layer and the main lightning conductor and is used for supporting the main lightning conductor and forming the bending state of the main lightning conductor at the lightning protection branch point and the pre-bending position. According to the invention, through the design of the lightning-protection branch point and the pre-bending position structure of the wind power blade, the allowance setting of a main lightning conductor can be effectively ensured, and the lightning-protection effect is ensured; the connection of the subsequent branch lightning conductor is facilitated by reserving allowance and stripping the insulating layer of the lightning branch point in advance, so that the connection effect is improved; structural design is reasonable, preparation convenient and fast.

Description

Lightning protection structure for lightning protection branch point and pre-bending position of wind power blade and manufacturing method
Technical Field
The invention relates to the field of wind power blades, in particular to a lightning protection structure for lightning protection branch points and pre-bending positions of wind power blades and a manufacturing method thereof.
Background
In order to avoid damage to the wind turbine blade caused by lightning strikes, a lightning protection system needs to be installed on the blade. The lightning protection system generally comprises a main lightning conductor, a branch lightning conductor, a lightning receptor base, a lightning receptor and the like. The blade deformation is great in the fan operation process, and the lightning conductor also takes place certain deformation thereupon. After the blade runs for a long time, the metal wire in the main lightning conductor is easy to damage and break, and the lightning protection effect is influenced. Therefore, when laying the main lightning conductor, a certain margin is required to be left at the lightning branch point and the pre-bending position.
At present, the main lightning conductor is generally integrally poured and manufactured with the web plate at the rear edge. Along with the wind power blades are longer and longer, the main lightning conductor is also longer and longer. When laying the main lightning conductor, along with the main lightning conductor is dragged, the main lightning conductor of lightning-arrest branch point department and reservation position is easily levelled, can't guarantee required lightning conductor surplus promptly when laying. In addition, this also causes the branch lightning conductor to be difficult to connect, and affects the connection quality and lightning protection effect. Therefore, it is necessary to study the structure of the lightning branch point and the pre-bending position of the blade to have the required margin.
Disclosure of Invention
The invention aims to provide a lightning protection structure for a lightning protection branch point and a pre-bending position of a wind power blade and a manufacturing method thereof, which can effectively protect lightning through the design of the lightning protection branch point and the pre-bending position.
In order to achieve the purpose, the specific technical scheme of the lightning protection branch point and the pre-bending position lightning protection structure of the wind power blade and the manufacturing method thereof is as follows:
the utility model provides a wind-powered electricity generation blade branch point and the lightning-arrest structure of preflex position, lightning-arrest structure sets up on trailing edge web structural layer, includes: the main lightning conductor is in a horizontal state and a bending state in a subsection mode, the lightning branch point and the pre-bending position are located on the main lightning conductor in the bending state, and the branch lightning conductor is connected to the lightning branch point on the main lightning conductor; the lightning conductor reinforcing cloth is laid on the main lightning conductor in a horizontal state; and the supporting block is arranged between the trailing edge web structural layer and the main lightning conductor and is used for supporting the main lightning conductor and forming the bending state of the main lightning conductor at the lightning protection branch point and the pre-bending position.
Furthermore, an insulating layer is arranged outside the main lightning conductor, and the branch lightning conductor is connected with the main lightning conductor by stripping the insulating layer of the lightning branch point.
Further, the main lightning conductor and the branch lightning conductor at the lightning protection branch are sealed through a sealing rubber strip and a vacuum bag film.
Further, the top of supporting shoe is provided with the circular arc recess that is used for placing main lightning conductor.
Further, the stripping length of the main lightning conductor outer insulating layer at the lightning protection branch point is 80-120 mm, and the main lightning conductor outer insulating layer is used for connecting the subsequent branch lightning conductors.
A manufacturing method of a lightning protection branch point and a pre-bending position lightning protection structure of a wind power blade comprises the following steps:
firstly, laying a main lightning conductor on a rear-edge web structural layer;
step two, after the insulating layer at the lightning branch point on the main lightning conductor is stripped, the exposed main lightning conductor is sealed;
thirdly, the main lightning conductor is placed on the supporting block, and the main lightning conductor is in a horizontal state and a bending state in a subsection mode;
fourthly, laying lightning protection reinforcing cloth on the main lightning conductor;
laying wrapping cloth on the supporting block;
step six, after laying the vacuum auxiliary materials, carrying out pressure maintaining, vacuum infusion and precuring;
and seventhly, stripping and tearing off the auxiliary materials.
Furthermore, in the second step, the stripped insulating layers of 40-60 mm are respectively measured towards two sides by taking the lightning branch point of the main lightning conductor as the center, and the length of the stripped insulating layers is 80-120 mm.
Further, in the third step, the supporting block is located in the middle of the pre-bending position and is placed on the side, away from the stripping position, of the blade root of the insulation layer stripping position, and the distance between the supporting block and the stripping position is 30-50 mm.
Furthermore, in the fourth step, a lightning protection reinforcing layer is laid on the main lightning conductor in the horizontal state for reinforcement.
Furthermore, in the fourth step, a plurality of layers of glass fiber cloth are laid at the lightning protection branch point on the main lightning conductor and at the two ends of the reserved position for reinforcement.
The lightning protection structure for the lightning protection branch point and the pre-bending position of the wind power blade and the manufacturing method have the advantages that:
1) through the design of the lightning-protection branch point and the pre-bending position structure of the wind power blade, the allowance setting of a main lightning conductor can be effectively ensured, and the lightning-protection effect is ensured;
2) the connection of the subsequent branch lightning conductor is facilitated by reserving allowance and stripping the insulating layer of the lightning branch point in advance, so that the connection effect is improved;
3) structural design is reasonable, preparation convenient and fast.
Drawings
Fig. 1 is a schematic structural view of a lightning protection structure at a lightning protection branch point according to the present invention;
fig. 2 is a schematic structural view of a lightning protection structure in a pre-bending position according to the present invention;
FIG. 3 is a schematic view of the support block of the present invention;
FIG. 4 is a side view of the support block of the present invention.
In the figure: 1. a trailing edge web structural layer; 2. a main lightning conductor; 3. an insulating layer; 4. a support block; 5. reinforcing cloth for the lightning conductor; 6. the supporting block wraps the cloth; 7. sealing rubber strips; 8. vacuum bag film; 9. a circular arc groove.
Detailed Description
In order to better understand the purpose, structure and function of the present invention, the lightning protection branch point and the pre-bending position lightning protection structure of the wind turbine blade and the manufacturing method thereof according to the present invention are further described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, which illustrate a lightning protection structure for a lightning branch point and a pre-bending position of a wind turbine blade and a manufacturing method thereof according to the present invention, the lightning protection structure is disposed on a web structural layer 1 at a trailing edge, and includes a main lightning conductor 2, a lightning conductor reinforcing cloth 5, and a support block 4, and effective lightning protection is achieved by lightning protection design at the lightning branch point and the pre-bending position of the main lightning conductor 2.
Specifically, the trailing edge web structural layer 1 includes a plurality of layers of glass fiber cloth and a core material, and the core material may be a PVC foam material or the like.
Further, main lightning conductor 2 is laid at the width center position above the inner side of rear edge web structural layer 1, rear edge web structural layer 1 is in a horizontal state and a bending state, the horizontal state is that main lightning conductor 2 clings to rear edge web structural layer 1, the bending state is that main lightning conductor 2 has a gap with rear edge web structural layer 1 at lightning branch point and pre-bending position, namely lightning branch point and pre-bending position are located on main lightning conductor 2 in the bending state, and branch lightning conductors are connected at lightning branch point on main lightning conductor 2.
And, according to the design, main lightning conductor 2 leaves certain margin (i.e. leaves a gap) at the lightning branch point and the pre-bending position, and the arc length of main lightning conductor 2 is 500-600 mm (preferably 550mm) longer than the projection length. The stripped length of the insulating layer 3 of the main lightning conductor 2 at the lightning branch point is 80-120 mm (preferably 100mm) for connecting the subsequent branch lightning conductor (not shown).
Further, the outer side (i.e. the lightning branch) of the exposed main lightning conductor 2 with the insulation layer 3 stripped off is sealed by the sealing rubber strip 7 and the vacuum bag film 8, so as to prevent the resin from entering the main lightning conductor 2 during pouring and affecting the lightning protection effect.
Further, except for the lightning-arrest branch point and the pre-bending position, a lightning conductor reinforcing cloth 5 is laid above the main lightning conductor 2 (namely, the lightning conductor reinforcing cloth 5 is laid on the main lightning conductor 2 in a horizontal state, the lightning conductor reinforcing cloth 5 is laid on the main lightning conductor 2 tightly attached to the trailing edge web structural layer 1, the lightning conductor reinforcing cloth 5 is not laid on the main lightning conductor 2 having a gap with the trailing edge web structural layer 1), and the lightning conductor reinforcing cloth 5 is 1-2 layers of biaxial glass fiber cloth. In addition, a plurality of layers of lightning conductor reinforcing cloth 5 are additionally laid at the lightning protection branch point and the two ends of the pre-bending position for reinforcement.
Further, a support block 4 is disposed between the trailing edge web structural layer 1 and the main lightning conductor 2 for supporting the main lightning conductor 2, forming a bent state of the main lightning conductor 2 at a lightning branch point and a pre-bending position. Specifically, at the pre-bending position of the main lightning conductor 2, the supporting block 4 is arranged at the bottom of the pre-bending position of the main lightning conductor 2 to support the main lightning conductor 2, so that the bending of the main lightning conductor 2 is formed, and the rear edge web structural layer 1 is far away from the bottom; and at the lightning protection branch point of the main lightning conductor 2, the supporting block 4 is arranged on the blade root side of the stripping position of the insulating layer 3 and is 30-50 mm away from the stripping position.
Further, the upper side of the supporting block 4 is provided with an arc groove 9 for placing and fixing the main lightning conductor 2, the diameter of the arc groove 9 is larger than that of the main lightning conductor 2, and the arc groove 9 of the supporting block 4 is placed along the direction of the main lightning conductor 2 when the main lightning conductor is placed. The supporting block 4 may be made of the same material as the core material of the trailing edge web structural layer 1, such as PVC foam.
Further, the thickness of the supporting block 4 is preferably 50-70 mm, the height is preferably 100-120 mm, the included angle between the waist line and the bottom is 30-45 degrees, and the length is 220-270 mm (preferably 250 mm).
Further, be provided with supporting block parcel cloth 6 on the main lightning conductor 2 of supporting block 4 top, be 1 ~ 2 layers of biax glass fiber cloth, supporting block parcel cloth 6 is used for covering supporting block 4 completely to avoid supporting block 4 to expose.
The invention also discloses a manufacturing method of the lightning protection branch point and the pre-bending position lightning protection structure of the wind power blade, which comprises the following steps:
the method comprises the following steps: and laying the main lightning conductor 2 on the rear edge web structural layer 1.
Specifically, after laying the trailing edge web structural layer 1, the main lightning conductor 2 is laid at a width center position above the inside of the trailing edge web structural layer 1. The trailing edge web structural layer 1 comprises a plurality of layers of glass fiber cloth and a core material.
And step two, after the insulating layer 3 at the lightning protection branch point on the main lightning conductor 2 is stripped, the exposed main lightning conductor 2 is sealed.
Specifically, according to the lightning protection design and the die coordinates, marking each lightning protection branch point on the main lightning conductor 2; measuring the length of 40-60 mm, preferably 50mm from the mark center to two sides respectively; the insulating layer 3 at each lightning branch point on the main lightning conductor 2 is stripped, and the stripping length is 80-120 mm, preferably 100 mm.
And, seal strip 7 and vacuum bag membrane 8 and seal the main lightning conductor 2 that exposes after stripping insulating layer 3, advance to glue when preventing to pour and influence lightning-arrest effect.
And step three, the main lightning conductor 2 is placed on the supporting block 4, and the main lightning conductor 2 is in a horizontal state and a bending state in a subsection mode.
Specifically, the supporting block 4 is positioned in the middle of the pre-bending position, and the supporting block 4 is placed on the root side of the stripping position of the insulating layer 3 (namely the root side of the lightning-protection branch point) and is 30-50 mm away from the stripping position; an arc groove 9 is arranged above the supporting block 4 and used for supporting the main lightning conductor 2, and the main lightning conductor 2 is placed in the arc groove 9.
And fourthly, laying lightning protection reinforcing cloth 5 on the main lightning conductor 2.
Specifically, 1-2 layers of biaxial glass fiber cloth are laid on the main lightning conductor 2 in a horizontal state for reinforcement, that is, the lightning reinforcement cloth 5 is broken at a pre-bending position (including a lightning branch point) of the main lightning conductor 2. In addition, a plurality of layers of glass fiber cloth are additionally paved at the lightning branch point on the main lightning conductor 2 and two ends of the reserved position for reinforcement.
And step five, paving wrapping cloth 6 on the supporting block 4.
Specifically, 1-2 layers of biaxial fiberglass cloth are laid on the main lightning conductor 2 above the supporting block 4 for wrapping the supporting block 4, and the biaxial fiberglass cloth needs to completely cover the supporting block 4 so as to avoid the supporting block 4 from being exposed.
And step six, after the vacuum auxiliary material is paved, pressure maintaining, vacuum infusion and precuring are carried out.
Specifically, the laying of the vacuum auxiliary material and the glue injection pipeline is carried out according to the process design, and the laying comprises a flow guide net, a glue injection pipe, a glue injection base, a vacuum bag film and the like. And then, completing the operations of pressure maintaining, vacuum infusion and precuring according to the process requirements.
And step eight, stripping and tearing off the auxiliary materials. And stripping the rear edge web, cleaning auxiliary materials such as a vacuum bag film, a current guide net and the like, and finishing the manufacture of the lightning-protection branch point and the pre-bending lightning-protection structure on the rear edge web.
According to the lightning protection structure for the lightning protection branch point and the pre-bending position of the wind power blade and the manufacturing method, the residual setting of a main lightning conductor can be effectively guaranteed through the design of the lightning protection branch point and the pre-bending position structure of the wind power blade, and the lightning protection effect is guaranteed; the connection of the subsequent branch lightning conductor is facilitated by reserving allowance and stripping the insulating layer of the lightning branch point in advance, so that the connection effect is improved; structural design is reasonable, preparation convenient and fast.
The present invention has been further described with reference to specific embodiments, but it should be understood that the detailed description should not be construed as limiting the spirit and scope of the present invention, and various modifications made to the above-described embodiments by those of ordinary skill in the art after reading this specification are within the scope of the present invention.

Claims (10)

1. The utility model provides a wind-powered electricity generation blade branch point and the lightning-arrest structure of preflex position which characterized in that, lightning-arrest structure sets up on trailing edge web structural layer (1), includes:
the main lightning conductor (2) is in a horizontal state and a bending state in a subsection mode, the lightning branch point and the pre-bending position are located on the main lightning conductor (2) in the bending state, and the branch lightning conductor is connected to the lightning branch point on the main lightning conductor (2);
the lightning conductor reinforcing cloth (5) is laid on the main lightning conductor (2) in a horizontal state; and
and the supporting block (4) is arranged between the trailing edge web structural layer (1) and the main lightning conductor (2) and is used for supporting the main lightning conductor (2) and forming the bending state of the main lightning conductor (2) at a lightning-protection branch point and a pre-bending position.
2. The wind power blade lightning branch point and pre-bending position lightning protection structure according to claim 1, characterized in that an insulating layer (3) is arranged outside the main lightning conductor (2), and the branch lightning conductor is connected with the main lightning conductor (2) by stripping the insulating layer (3) of the lightning branch point.
3. The wind power blade lightning branch point and pre-bending position lightning protection structure according to claim 1 or 2, characterized in that the main lightning conductor (2) at the lightning protection branch point and the branch lightning conductor are sealed by a sealing rubber strip (7) and a vacuum bag film (8).
4. The wind power blade lightning protection branch point and pre-bending position lightning protection structure according to claim 1, characterized in that an arc groove (9) for placing the main lightning conductor (2) is arranged above the supporting block (4).
5. The wind power blade lightning protection branch point and pre-bending position lightning protection structure according to claim 2, characterized in that the stripping length of the outer insulating layer (3) of the main lightning conductor (2) at the lightning protection branch point is 80-120 mm for the connection of the subsequent branch lightning conductor.
6. A manufacturing method of a wind power blade lightning protection branch point and a pre-bending position lightning protection structure is characterized by comprising the following steps:
firstly, laying a main lightning conductor (2) on a rear-edge web structural layer (1);
step two, after the insulating layer (3) at the lightning protection branch point on the main lightning conductor (2) is stripped, the exposed main lightning conductor (2) is sealed;
thirdly, the main lightning conductor (2) is placed on the supporting block (4), and the main lightning conductor (2) is in a horizontal state and a bending state in sections;
fourthly, laying lightning protection reinforcing cloth (5) on the main lightning conductor (2);
laying wrapping cloth (6) on the supporting block (4);
step six, after laying the vacuum auxiliary materials, carrying out pressure maintaining, vacuum infusion and precuring;
and seventhly, stripping and tearing off the auxiliary materials.
7. The manufacturing method of the wind power blade lightning protection branch point and the pre-bending position lightning protection structure according to claim 6, characterized in that in the second step, 40-60 mm stripped insulation layers (3) are respectively measured towards two sides by taking the lightning protection branch point of the main lightning conductor (2) as a center, and the lengths of the stripped insulation layers (3) are 80-120 mm.
8. The manufacturing method of the wind power blade lightning protection branch point and the pre-bending position lightning protection structure according to claim 6 or 7, characterized in that in the third step, the supporting block (4) is positioned in the middle of the pre-bending position and is placed on the blade root side of the stripping position of the insulating layer (3) and is 30-50 mm away from the stripping position.
9. The method for manufacturing the lightning protection branch point and the lightning protection structure at the pre-bending position of the wind power blade according to claim 6, wherein in the fourth step, the lightning protection reinforcing layer (5) is laid on the main lightning conductor (2) in the horizontal state for reinforcement.
10. The manufacturing method of the wind power blade lightning protection branch point and the pre-bending position lightning protection structure according to claim 6 or 9, characterized in that in the fourth step, a plurality of layers of glass fiber cloth are laid at the lightning protection branch point on the main lightning conductor (2) and at two ends of the reserved position for reinforcement.
CN202110309195.8A 2021-03-23 2021-03-23 Wind power blade lightning-protection branch point and pre-bending position lightning-protection structure and manufacturing method Active CN112879248B (en)

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CN202110309195.8A CN112879248B (en) 2021-03-23 2021-03-23 Wind power blade lightning-protection branch point and pre-bending position lightning-protection structure and manufacturing method

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Application Number Priority Date Filing Date Title
CN202110309195.8A CN112879248B (en) 2021-03-23 2021-03-23 Wind power blade lightning-protection branch point and pre-bending position lightning-protection structure and manufacturing method

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CN112879248A true CN112879248A (en) 2021-06-01
CN112879248B CN112879248B (en) 2024-03-22

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015003953A1 (en) * 2013-07-10 2015-01-15 Senvion Se Rotor blade comprising a lightning conductor
CN205190128U (en) * 2015-11-18 2016-04-27 国电联合动力技术(连云港)有限公司 Fan blade web of pre -buried overhead ground wire
US20190145383A1 (en) * 2017-11-14 2019-05-16 Siemens Gamesa Renewable Energy A/S Wind turbine blade and a wind turbine
EP3736443A1 (en) * 2019-05-09 2020-11-11 Siemens Gamesa Renewable Energy A/S Blade for a wind turbine and wind turbine
CN212272471U (en) * 2020-06-11 2021-01-01 国电联合动力技术(保定)有限公司 Wind-powered electricity generation blade branch line and thread connection structure that takes shelter from thunder
CN112901428A (en) * 2021-03-23 2021-06-04 国电联合动力技术(保定)有限公司 Manufacturing method of lightning protection system of wind power blade
CN214741865U (en) * 2021-03-23 2021-11-16 国电联合动力技术(保定)有限公司 Lightning-protection structure for lightning-protection branch point and pre-bending position of wind power blade

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015003953A1 (en) * 2013-07-10 2015-01-15 Senvion Se Rotor blade comprising a lightning conductor
EP3019744A1 (en) * 2013-07-10 2016-05-18 Senvion GmbH Rotor blade comprising a lightning conductor
CN205190128U (en) * 2015-11-18 2016-04-27 国电联合动力技术(连云港)有限公司 Fan blade web of pre -buried overhead ground wire
US20190145383A1 (en) * 2017-11-14 2019-05-16 Siemens Gamesa Renewable Energy A/S Wind turbine blade and a wind turbine
EP3736443A1 (en) * 2019-05-09 2020-11-11 Siemens Gamesa Renewable Energy A/S Blade for a wind turbine and wind turbine
CN212272471U (en) * 2020-06-11 2021-01-01 国电联合动力技术(保定)有限公司 Wind-powered electricity generation blade branch line and thread connection structure that takes shelter from thunder
CN112901428A (en) * 2021-03-23 2021-06-04 国电联合动力技术(保定)有限公司 Manufacturing method of lightning protection system of wind power blade
CN214741865U (en) * 2021-03-23 2021-11-16 国电联合动力技术(保定)有限公司 Lightning-protection structure for lightning-protection branch point and pre-bending position of wind power blade

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