CN112483335B - Lightning protection assembly for wind power blade root and installation method thereof - Google Patents

Lightning protection assembly for wind power blade root and installation method thereof Download PDF

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Publication number
CN112483335B
CN112483335B CN202011313445.7A CN202011313445A CN112483335B CN 112483335 B CN112483335 B CN 112483335B CN 202011313445 A CN202011313445 A CN 202011313445A CN 112483335 B CN112483335 B CN 112483335B
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CN
China
Prior art keywords
lightning protection
glass fiber
fiber reinforced
reinforced plastic
cap
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CN202011313445.7A
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CN112483335A (en
Inventor
牛彭彭
林明
牛世军
骆媛媛
任令响
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Jiangsu Shuangrui Wind Turbine Blade Co ltd
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Jiangsu Shuangrui Wind Turbine Blade Co ltd
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Publication of CN112483335A publication Critical patent/CN112483335A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D80/00Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/30Lightning protection
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03DWIND MOTORS
    • F03D13/00Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/10Assembly of wind motors; Arrangements for erecting wind motors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/72Wind turbines with rotation axis in wind direction

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Wind Motors (AREA)

Abstract

The invention discloses a lightning protection component for the root of a wind power blade and an installation method thereof, wherein the lightning protection component comprises a lightning protection ring, a cap-shaped glass fiber reinforced plastic gasket, a connecting lug and a carbon brush, the lightning protection ring is respectively connected with the connecting lug and the carbon brush, one end of the connecting lug, which is far away from the lightning protection ring, is connected with a copper wire, the carbon brush is connected with a blade hub, the copper wire conducts lightning to the lightning protection ring through the connecting lug, and the lightning received by the lightning protection ring is conducted to the blade hub through the carbon brush; the lower end face of the cap-shaped glass fiber reinforced plastic gasket is adhered to the root of the blade, the cap-shaped glass fiber reinforced plastic gasket is formed by splicing two completely consistent half cap-shaped glass fiber reinforced plastic gaskets, the lightning protection ring is formed by welding two half rings, bolts sequentially penetrate through the half rings and the half cap-shaped glass fiber reinforced plastic gasket and then are connected with nuts in a threaded mode so as to connect the half rings with the half cap-shaped glass fiber reinforced plastic gasket, the top of each bolt does not emit the lightning protection ring, and the lightning protection assembly can be ensured to be adhered to the outer surface of the shell of the root of the blade simply and firmly while the lightning protection performance is ensured.

Description

Lightning protection assembly for wind power blade root and installation method thereof
Technical Field
The invention relates to the field of wind power blade lightning protection systems, in particular to a lightning protection component for a wind power blade root and an installation method thereof.
Background
Wind energy is used as renewable clean energy, and wind power generation is also receiving more and more attention at home and abroad. With the development of wind power technology, the height of the fan is increased continuously along with the increase of the height of the hub and the diameter of the impeller, and the risk of lightning stroke of the fan is also increased. Among them, the maintenance labor cost of the fan parts damaged by lightning strike, the downtime to reduce the power generation amount, etc. are very expensive. Therefore, the lightning protection technology of the wind power blade is required to be higher.
Generally, wind-powered electricity generation blade's basic lightning protection device mainly includes the aluminium point at leaf point portion, the lightning arrester at blade body middle part and the stainless steel lightning protection ring at blade root, and the lightning arrester at blade point portion aluminium point and middle part is installed at the compound die process, because they are small, and the installation is fixed comparatively convenient, and the stainless steel lightning protection ring is generally directly glued to the blade root surface with the adhesive, and this kind of direct bonding's condition appears the adhesive cracking phenomenon easily in the unit operation, and then can take place the drop of lightning protection ring, finally leads to whole wind-powered electricity generation blade lightning protection system to be destroyed.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the lightning protection component for the root of the wind power blade and the installation method thereof, which can ensure that the lightning protection component is simply and firmly adhered to the outer surface of the shell of the root of the blade while ensuring lightning conductivity.
In order to achieve the above purpose, the invention adopts the following specific scheme:
the utility model provides a wind-powered electricity generation is lightning protection subassembly for blade root, includes lightning protection ring, cap-type glass steel packing ring, engaging lug and carbon brush, the lightning protection ring is connected with engaging lug, carbon brush respectively, and the one end that the engaging lug kept away from the lightning protection ring is connected with the copper wire that plays the effect of leading thunder in blade middle part, the one end that the carbon brush kept away from the lightning protection ring links to each other with blade wheel hub, and the copper wire passes through the engaging lug and conducts the thunder and lightning to the lightning protection ring on, and the thunder and lightning that the lightning protection ring received is conducted to blade wheel hub through the carbon brush; the lower end face of the cap-shaped glass fiber reinforced plastic gasket is adhered to the root of the blade, the cap-shaped glass fiber reinforced plastic gasket is formed by splicing two completely identical half cap-shaped glass fiber reinforced plastic gaskets, the lightning protection ring is formed by welding two opposite semicircular rings, the two semicircular rings are respectively fixed on the corresponding half cap-shaped glass fiber reinforced plastic gaskets, the two semicircular rings sequentially penetrate through the semicircular rings and the half cap-shaped glass fiber reinforced plastic gaskets through bolts and then are connected with nuts in a threaded mode so as to connect the semicircular rings with the half cap-shaped glass fiber reinforced plastic gaskets, and the lightning protection ring does not emerge from the tops of the bolts.
Further, the semi-hat type glass fiber reinforced plastic gasket sequentially comprises a small-diameter semicircular ring part, a semicircular cylinder part and a large-diameter semicircular ring part from top to bottom, wherein the outer diameter of the small-diameter semicircular ring part, the inner diameter of the semicircular cylinder part and the inner diameter of the large-diameter semicircular ring part are equal, through holes for bolts to pass through are formed in the small-diameter semicircular ring part, and the bottom of the large-diameter semicircular ring part is bonded with the root of a blade through an adhesive.
Further, an arc-shaped backing plate is arranged at the bottom of the small-diameter semicircular ring part, and the bolts sequentially penetrate through the semicircular ring, the small-diameter semicircular ring part and the arc-shaped backing plate and are connected with the nuts in a threaded mode.
Further, the connecting lugs are in a zigzag shape, and one end, far away from the lightning protection ring, of each connecting lug is connected with a copper nose at the end part of the copper wire through a fastener.
Further, each semicircular ring is provided with at least one inner counter bore for a bolt to pass through.
Further, the bolt is an inner hexagonal countersunk head bolt.
Further, the lightning protection ring is made of stainless steel.
The installation method of the lightning protection component for the root of the wind power blade comprises the following steps of:
firstly, placing a semicircular ring on the top of a small-diameter semicircular ring part, forming a through hole on the small-diameter semicircular ring part by using a drilling tool to pass through an inner counter bore after aligning the peripheries of the semicircular ring part, sequentially passing a bolt through the inner counter bore and the through hole, and screwing a nut to fasten the semicircular ring and a semi-cap type glass fiber reinforced plastic gasket into a whole, and fastening the other semicircular ring and the semi-cap type glass fiber reinforced plastic gasket into a whole by adopting the method;
coating adhesive on the bottoms of the two semi-hat type glass fiber reinforced plastic gaskets, bonding the two semi-hat type glass fiber reinforced plastic gaskets to the root of the blade in a seamless or basically seamless state, welding the two semi-circular rings together to form a lightning protection ring after the adhesive is solidified, and polishing the welding part to be smooth;
and thirdly, welding the connecting lugs to the side face of the lightning protection ring, installing a copper nose at the end part of the copper wire 1 extending out of the middle part of the blade, fixing the copper nose and the connecting lugs by using a fastener, and finally connecting the carbon brush with the lightning protection ring.
Advantageous effects
1. The lightning protection assembly comprises a lightning protection ring, a cap-shaped glass fiber reinforced plastic gasket, a connecting lug and a carbon brush, wherein (1) a copper wire in the middle of a blade conducts lightning to the lightning protection ring through the connecting lug, the lightning received by the lightning protection ring is conducted to a blade hub, a main shaft and a tower through the carbon brush, and finally the lightning is led into the ground through a down lead, so that the lightning can be simply conducted to the ground through the lightning protection assembly; (2) The lightning protection ring is fixed on the cap-shaped glass fiber reinforced plastic gasket by the bolts, the lightning protection ring and the cap-shaped glass fiber reinforced plastic gasket are integrally adhered to the outer surface of the blade root shell, so that the installation quality of the lightning protection component is effectively improved, the falling off of the lightning protection component is avoided, and the process operation is relatively convenient. Meanwhile, the follow-up property of the lightning protection ring can be effectively controlled; (3) The top of the bolt does not emit the lightning protection ring, so that the carbon brush cannot interfere with the bolt when in contact with the lightning protection ring, and damage to the carbon brush is avoided.
2. The lightning protection component has simple structure and strong applicability, and can be used only by the lightning protection mechanism related to the root of the blade.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly explain the embodiments or the drawings needed in the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present invention and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a front view of a lightning protection assembly of the invention.
Fig. 2 is a schematic structural view of a lightning protection ring.
Fig. 3 is a schematic structural view of a cap-type glass fiber reinforced plastic gasket.
Fig. 4 is a schematic structural view of an arc-shaped pad.
The anti-lightning device comprises a graphic mark, 1, a copper wire, 2, a copper nose, 3, a fastener, 4, a connecting lug, 5, a lightning protection ring, 6, a bolt, 7, a cap-shaped glass fiber reinforced plastic gasket, 8, an arc-shaped backing plate, 9, a nut, 10, a carbon brush, 11, a blade root, 12, an inner counter bore, 13 and a through hole.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below in connection with specific embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Referring to fig. 1, the lightning protection component for the root of a wind power blade comprises a lightning protection ring 5, a cap-shaped glass fiber reinforced plastic gasket 7, a connecting lug 4 and a carbon brush 10, wherein the lightning protection ring 5 is respectively connected with the connecting lug 4 and the carbon brush 10, one end of the connecting lug 4, which is far away from the lightning protection ring 5, is connected with a copper wire 1 which plays a lightning guiding role in the middle of the blade, one end of the carbon brush 10, which is far away from the lightning protection ring 5, is connected with a blade hub, the copper wire 1 conducts lightning to the lightning protection ring 5 through the connecting lug 4, and the lightning received by the lightning protection ring 5 is conducted to the blade hub through the carbon brush 10; the lower end surface of the cap-shaped glass fiber reinforced plastic gasket 7 is adhered to the root 11 of the blade, please refer to fig. 3, the cap-shaped glass fiber reinforced plastic gasket 7 is formed by assembling two completely identical half cap-shaped glass fiber reinforced plastic gaskets, the two half cap-shaped glass fiber reinforced plastic gaskets are formed by adopting a vacuum pouring process, please refer to fig. 2, the lightning protection ring 5 is formed by welding two oppositely arranged semicircular rings, and the lightning protection ring 5 is arranged into two semicircular rings, so that the shape following performance of the lightning protection ring 5 can be effectively controlled. Two semicircle rings are fixed on corresponding semicircle cap type glass steel washer respectively, utilize bolt 6 to pass semicircle ring, semicircle cap type glass steel washer back with nut 9 threaded connection in order to be connected semicircle ring and semicircle cap type glass steel washer in proper order, lightning protection ring 5 is not emitted at bolt 6 top for when carbon brush 10 and lightning protection ring 5's contact, can not take place to interfere with bolt 6, can guarantee carbon brush 10 and lightning protection ring 5's good contact.
Referring to fig. 3, the semi-hat glass fiber reinforced plastic gasket sequentially comprises a small-diameter semicircular ring part, a semicircular cylinder part and a large-diameter semicircular ring part from top to bottom, wherein the outer diameter of the small-diameter semicircular ring part, the inner diameter of the semicircular cylinder part and the inner diameter of the large-diameter semicircular ring part are equal, a through hole 13 for a bolt 6 to pass through is formed in the small-diameter semicircular ring part, and the bottom of the large-diameter semicircular ring part is bonded with the root 11 of the blade through an adhesive. Because the material of the blade root 11 is glass fiber reinforced plastic, the cap-shaped glass fiber reinforced plastic gasket 7 and the blade root 11 are firmly bonded by using an adhesive after being bonded, and the lightning protection component and the blade root 11 can be prevented from being cracked by the adhesive by controlling the thickness of the adhesive.
Referring to fig. 1 and 4, an arc-shaped backing plate 8 is arranged at the bottom of the small-diameter ring part, and the bolt 6 sequentially passes through the semicircular ring, the small-diameter semicircular ring part and the arc-shaped backing plate 8 and then is in threaded connection with a nut 9.
The connecting lugs 4 are in a folded line shape, and one end, far away from the lightning protection ring 5, of each connecting lug 4 is connected with the copper nose 2 at the end part of the copper wire 1 through the fastener 3.
Each semicircle is provided with at least one inner counter bore 12 for the bolts 6 to pass through. In detail, referring to fig. 2, the number of the inner counter bores 12 on each semicircular ring is two.
In detail, the bolt 6 is a hexagon socket head cap bolt.
Wherein, the material of lightning protection ring 5 is stainless steel.
As shown in fig. 1, the installation method of the lightning protection component comprises the following steps:
firstly, placing a semicircular on the top of a small-diameter semicircular part, using a drilling tool to pass through an inner counter bore 12 after aligning all around, forming a through hole 13 on the small-diameter semicircular part, sequentially passing a bolt 6 through the inner counter bore 12 and the through hole 13, and screwing a nut 9 to fasten the semicircular and the semi-cap-shaped glass fiber reinforced plastic gasket into a whole, and fastening the other semicircular and the semi-cap-shaped glass fiber reinforced plastic gasket into a whole by adopting the method;
coating adhesive on the bottoms of the two semi-hat type glass fiber reinforced plastic gaskets, bonding the two semi-hat type glass fiber reinforced plastic gaskets to the root 11 of the blade in a seamless or basically seamless state, and welding the two semi-circular rings together to form a lightning protection ring 5 after the adhesive is solidified, wherein the welding part is polished smoothly;
and thirdly, welding the connecting lugs 4 to the side surfaces of the lightning protection rings 5, installing copper noses 2 at the ends of the copper wires 1 extending out of the middle parts of the blades, fixing the copper noses 2 and the connecting lugs 4 by using the fasteners 3, and finally connecting the carbon brushes 10 with the lightning protection rings 5.
The above description is only of the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. All equivalent changes or modifications made according to the essence of the present invention should be included in the scope of the present invention.

Claims (6)

1. A lightning protection assembly for wind power blade root is characterized in that: the lightning protection device comprises a lightning protection ring (5), a cap-shaped glass fiber reinforced plastic gasket (7), a connecting lug (4) and a carbon brush (10), wherein the lightning protection ring (5) is respectively connected with the connecting lug (4) and the carbon brush (10), one end of the connecting lug (4) away from the lightning protection ring (5) is connected with a copper wire (1) with a lightning guiding function in the middle of a blade, one end of the carbon brush (10) away from the lightning protection ring (5) is connected with a blade hub, the copper wire (1) conducts lightning to the lightning protection ring (5) through the connecting lug (4), and lightning received by the lightning protection ring (5) is conducted to the blade hub through the carbon brush (10); the blade root (11) is made of glass fiber reinforced plastic, the lower end face of the cap-shaped glass fiber reinforced plastic gasket (7) is adhered to the blade root (11), the cap-shaped glass fiber reinforced plastic gasket (7) is formed by splicing two completely consistent half cap-shaped glass fiber reinforced plastic gaskets, the lightning protection ring (5) is formed by welding two opposite half rings, the two half rings are respectively fixed on the corresponding half cap-shaped glass fiber reinforced plastic gaskets, and the two half rings penetrate through the half rings and the half cap-shaped glass fiber reinforced plastic gaskets in sequence by using bolts (6) and then are connected with nuts (9) in a threaded manner so as to connect the half rings with the half cap-shaped glass fiber reinforced plastic gaskets, and the lightning protection ring (5) is not emitted from the tops of the bolts (6); the semi-hat type glass fiber reinforced plastic gasket sequentially comprises a small-diameter semicircular ring part, a semicircular cylinder part and a large-diameter semicircular ring part from top to bottom, wherein the outer diameter of the small-diameter semicircular ring part, the inner diameter of the semicircular cylinder part and the inner diameter of the large-diameter semicircular ring part are equal, a through hole (13) for a bolt (6) to pass through is formed in the small-diameter semicircular ring part, and the bottom of the large-diameter semicircular ring part is bonded with the root part (11) of the blade through an adhesive; the bottom of the small-diameter semicircular ring part is provided with an arc-shaped base plate (8), and the bolt (6) sequentially passes through the semicircular ring, the small-diameter semicircular ring part and the arc-shaped base plate (8) and then is in threaded connection with the nut (9).
2. A wind turbine blade root lightning protection assembly according to claim 1, wherein: the connecting lug (4) is in a zigzag shape, and one end, far away from the lightning protection ring (5), of the connecting lug (4) is connected with the copper nose (2) at the end part of the copper wire (1) through the fastener (3).
3. A wind turbine blade root lightning protection assembly according to claim 1, wherein: at least one inner counter bore (12) for the bolts (6) to pass through is arranged on each semicircular ring.
4. A wind turbine blade root lightning protection assembly according to claim 1, wherein: the bolt (6) is an inner hexagonal countersunk head bolt.
5. A wind turbine blade root lightning protection assembly according to claim 1, wherein: the lightning protection ring (5) is made of stainless steel.
6. A method of installing a lightning protection assembly for a wind turbine blade root according to claim 3, comprising the steps of:
firstly, placing a semicircular ring on the top of a small-diameter semicircular ring part, after aligning all around, using a drilling tool to pass through an inner counter bore (12) to open a through hole (13) on the small-diameter semicircular ring part, sequentially passing a bolt (6) through the inner counter bore (12) and the through hole (13) and screwing a nut (9) to fasten the semicircular ring and a semi-cap type glass fiber reinforced plastic gasket into a whole, and adopting the method to fasten the other semicircular ring and the semi-cap type glass fiber reinforced plastic gasket into a whole;
coating adhesive on the bottoms of the two semi-hat type glass fiber reinforced plastic gaskets, bonding the two semi-hat type glass fiber reinforced plastic gaskets to the root (11) of the blade in a seamless or basically seamless state, and welding the two semi-circular rings together to form a lightning protection ring (5) after the adhesive is solidified, wherein the welding part is polished to be smooth;
and thirdly, welding the connecting lugs (4) to the side surfaces of the lightning protection rings (5), installing copper noses (2) at the ends of the copper wires (1) extending out of the middle parts of the blades, fixing the copper noses (2) and the connecting lugs (4) by using the fasteners (3), and finally connecting the carbon brushes (10) with the lightning protection rings (5).
CN202011313445.7A 2020-11-20 2020-11-20 Lightning protection assembly for wind power blade root and installation method thereof Active CN112483335B (en)

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116576079B (en) * 2023-05-23 2023-11-17 上海玻璃钢研究院东台有限公司 Blade lightning arrester of wind driven generator

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EP2930357A1 (en) * 2014-04-10 2015-10-14 Nordex Energy GmbH Wind energy plant rotor blade with a lightning conductor base
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CN214145772U (en) * 2020-11-20 2021-09-07 江苏双瑞风电叶片有限公司 Lightning protection assembly for wind power blade root

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201318383D0 (en) * 2013-10-17 2013-12-04 Vestas Wind Sys As Improvements relating to lighting protection systems for wind turbine blades
EP2930357A1 (en) * 2014-04-10 2015-10-14 Nordex Energy GmbH Wind energy plant rotor blade with a lightning conductor base
DE102017107859A1 (en) * 2017-04-11 2018-10-11 Nordex Energy Gmbh Lightning protection device for a rotor blade of a wind energy plant
CN108266335A (en) * 2017-12-18 2018-07-10 洛阳双瑞风电叶片有限公司 A kind of wind power plant blade lightning protection device
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CN214145772U (en) * 2020-11-20 2021-09-07 江苏双瑞风电叶片有限公司 Lightning protection assembly for wind power blade root

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