CN105134511B - A kind of lightning protection device of wind power blade - Google Patents
A kind of lightning protection device of wind power blade Download PDFInfo
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- CN105134511B CN105134511B CN201510694778.1A CN201510694778A CN105134511B CN 105134511 B CN105134511 B CN 105134511B CN 201510694778 A CN201510694778 A CN 201510694778A CN 105134511 B CN105134511 B CN 105134511B
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- arrester
- main
- blade
- protection device
- auxiliary
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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
Abstract
A kind of lightning protection device of wind power blade, including blade body and the main arrester on blade body, in addition to multiple auxiliary arresters, auxiliary arrester are provided with the first thermal insulation layer close to the part surface of blade body；It is separated by form the first discharging gap between adjacent two auxiliary arrester, is separated by form the second discharging gap between main arrester and auxiliary arrester, the lightning current that auxiliary arrester is received flows into main arrester, and main arrester is grounded by a downlead.The lightning protection device of the wind power blade of the present invention, sets main arrester and multiple auxiliary arresters on blade body, and can improve blade body effectively connects sudden strain of a muscle rate, prevents blade body to be damaged；It can also reduce the high-temperature damage that main arrester and multiple auxiliary arresters are operationally caused to blade body surface simultaneously.
Description
Technical field
The invention belongs to lightning protection technical field, and in particular to a kind of lightning protection device of wind power blade.
Background technology
Wind generator set blade is the frequent important part being struck by lightning in wind power generating set.Thunder is being met with to multi-disc
The wind power blade hit is found after being analyzed；The sudden strain of a muscle rate that connects of blade is 78% or so, and is carried out at the position that thunder and lightning hits blade
Found after classification, only 28% thunder and lightning hits the arrester on blade and effectively connects sudden strain of a muscle so as to be formed, and more thunders and lightnings are hit
Blade surface formed it is invalid connect sudden strain of a muscle, and badly damaged is caused to blade.Because when blade bears thunderbolt, due to blade table
Face belongs to semiconductor in the presence of moisture film, at this moment can form a plurality of upward leader in blade surface, be installed on blade body
The upward leader that arrester is formed is one of discharge channel of lightning current, but whether the upward leader that arrester is formed can
Enough descending leader UNICOMs smoothly with thunder and lightning formation are not absolute, and with the up elder generation formed in blade prevailing circumstances
Total amount is led to be inversely proportional, thus a certain moment blade surface formation upward leader quantity it is more, arrester connect sudden strain of a muscle probability it is lower.
But the blade tip part of existing wind power blade is provided only with an arrester, it is caused to connect sudden strain of a muscle efficiency low.
The reason for causing blade damage is many, can be largely classified into two aspects：First, arrester is connecing sudden strain of a muscle
Afterwards, substantial amounts of heat history can be produced, causes the blade around arrester to be burnt because of high temperature, and blade interior humid air
Cause blade damage in the heat history meeting transient evaporation expansion for running into arrester bottom.And for the problem, traditional solution party
Method is that resin material is inlayed at corresponding position on blade, but easily it is cracking, the problems such as release.
Secondly, blade effectively to connect sudden strain of a muscle rate relatively low.Blade effectively connects sudden strain of a muscle rate and refers to that the metallic receptor on blade is direct
Contacted with lightning current, and lightning current is released by downlead.And the design of blade arrester is more fixed and single, sudden strain of a muscle is connect
Device can not effectively connect sudden strain of a muscle and cause to be formed thunderbolt attachment point around arrester on blade, cause blade damage.
The content of the invention
In view of the shortcomings of the prior art, it is an object of the invention to provide a kind of lightning protection device of wind power blade, Neng Gouti
Height effectively connects sudden strain of a muscle rate, prevents the high temperature because of arrester from causing blade damage.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of lightning protection device of wind power blade, including blade body and the main arrester on blade body, also
Including multiple auxiliary arresters, the part surface of the close blade body of arrester is aided in be provided with the first thermal insulation layer；Adjacent two
It is separated by form the first discharging gap between auxiliary arrester, is separated by be formed between the second electric discharge between main arrester and auxiliary arrester
Gap, the lightning current that auxiliary arrester is received flows into main arrester, and main arrester is grounded by a downlead.
It is preferred that, main arrester is provided with the second thermal insulation layer close to the part surface of blade body.
It is preferred that, heat insulation layer is made up of heat-insulating material of the heat resisting temperature more than 150 DEG C.
It is preferred that, provided with radiating cavity in main arrester.
It is preferred that, length direction uniform intervals of multiple auxiliary arresters along blade body are arranged in the two of main arrester
Side.
It is preferred that, main arrester is distributed with multiple auxiliary arresters on blade body in isosceles triangle, multiple auxiliary
Arrester uniform intervals are arranged on the stringcourse of the isosceles triangle, and main arrester is located at the intersection point of the stringcourse of isosceles triangle two.
It is preferred that, the lightning protection device includes the multiple main arresters being intervally arranged along the bearing of trend of blade body, each
Main arrester correspondence is furnished with multiple auxiliary arresters, each main arrester with it is corresponding it is multiple aid in arresters on blade body it is equal
It is distributed in isosceles triangle.
It is preferred that, multiple auxiliary arresters axis circumferentially array distributions centered on main arrester.
It is preferred that, main arrester is discoid.
It is preferred that, auxiliary arrester is discoid.
The beneficial effects of the present invention are：
Compared to prior art, the lightning protection device of wind power blade of the invention, set on blade body main arrester and
Multiple auxiliary arresters, can improve blade body effectively connects sudden strain of a muscle rate, prevents blade body to be damaged；Master can be also reduced simultaneously to connect
Dodge the high-temperature damage that device and multiple auxiliary arresters are operationally caused to blade body surface.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation of the main arrester of the present invention；
Fig. 3 is the structural representation for aiding in arrester of the invention.
Wherein, 10, blade body；20th, main arrester；21st, the second thermal insulation layer；22nd, radiate cavity；30th, auxiliary connects sudden strain of a muscle
Device；31st, the first thermal insulation layer.
Embodiment
Below, with reference to accompanying drawing and embodiment, the present invention is described further：
A kind of lightning protection device of wind power blade as shown in Figure 1, Figure 2 and shown in Fig. 3, blade body 10, main arrester 20 with
And it is multiple auxiliary arresters 30, the main arrester 20 and it is multiple auxiliary arrester 30 be installed on blade body 10, specifically
In auxiliary arrester 30 the first thermal insulation layer 31 is provided with close to the part surface of blade body 10；It is adjacent two auxiliary arrester 30 it
Between be separated by form the first discharging gap, be separated by form the second discharging gap between main arrester 20 and auxiliary arrester 30, it is and auxiliary
The lightning current for helping arrester 30 to receive flows into main arrester 20, is grounded through main arrester 20 by a downlead.
On the basis of said structure, the multiple auxiliary arresters 30 being provided with blade body 10 may be separately formed
Row guide, improves the quantity of the upward leader formed by overall arrester, so as to reduce blade to a certain extent from figure
Into upward leader ratio, that is, add the unit area of blade body 10 because arrester formation upward leader quantity, such as
This just can improve the conducting advantage of lightning current and arrester, and that improves arrester connects sudden strain of a muscle probability, reduce lightning current directly through leaf
The probability that piece main body 10 is discharged, effectively prevents blade to be damaged.
Meanwhile, once upward leader and the descending leader of lightning current formation that one of auxiliary arrester 30 is formed are real
Now turn on, because auxiliary arrester 30 is provided with the first thermal insulation layer 31, can prevent auxiliary arrester 30 from producing substantial amounts of heat history
Cause the damage of blade；And there is the first discharging gap between adjacent two auxiliary arrester 30, because collecting the effect of skin principle, now
Lightning current can form dielectric surface flashover between auxiliary arrester 30, meanwhile, deposited between main arrester 20 and auxiliary arrester 30
In the second discharging gap, the breakdown condition of lightning current is met, lightning current is hitting auxiliary arrester 30 due to earth-free auxiliary
Arrester 30 meets high frequency lightning current breakdown condition, therefore, lightning current with the distance between the arrester of ground connection gap at one end
Meeting carries out being allowed to discharge through drawing for main arrester 20 in the form of dielectric surface flashover to arrester after auxiliary arrester 30 is hit
It is offline that lightning current is released to greatly.
It is preferred that, main arrester 20 close to blade body 10 part surface be provided with the second thermal insulation layer 21, prevent because
Main arrester 20 produces the damage that substantial amounts of heat history causes blade.Further, the temperature that can be born by general blade is not
More than 70 DEG C, therefore above-mentioned second thermal insulation layer 21 is made up of heat-insulating material of the heat resisting temperature more than 150 DEG C, and effect more preferably, has
Body can be modified form phenolic resin or other ameliorative resin, polyester etc..It is preferred that, can also be provided with scattered in above-mentioned main arrester 20
Hot cavity 22, for the main radiating of itself of arrester 20, further reduces the heat history that main arrester 20 is produced.
It is preferred that, in the present embodiment, between length direction of the above-mentioned multiple auxiliary arresters 30 along blade body 10 is uniform
Every the both sides for being arranged in main arrester 20, increase area of the auxiliary arrester 30 on blade body surface, it is multiple auxiliary beneficial to improving
That helps arrester 30 connects sudden strain of a muscle rate.Certainly, in other cases, multiple auxiliary axis centered on main arrester 20 of arrester 30 are in
Circumference array distribution can also realize the effect above.
It is preferred that, main arrester 20 is distributed with multiple auxiliary arresters 30 on blade body 10 in isosceles triangle, many
The individual auxiliary uniform intervals of arrester 30 are arranged on the stringcourse of the isosceles triangle, and main arrester 20 is located at the waist of isosceles triangle two
The intersection point of line.Specific main arrester 20 is on the summit (i.e. the blade tip position of blade body 10) of the horizontal chord length of blade body and does one
Bar straight line, while being that vertical centre does a vertical line in combination with the horizontal chord length of above-mentioned blade body 10 with main arrester 20
Line, in this, as two sides of an auxiliary triangle shape；It is last using main arrester 20 and the line of the blade root of blade body as
3rd side of auxiliary triangle shape, completes the side of isosceles triangle, then with the vertical line in blade on the basis of said structure
Main body does the mirror image of above-mentioned auxiliary triangle shape to blade root direction, can so obtain an isosceles triangle, multiple auxiliary arresters
30 can be arranged on the stringcourse of this isosceles triangle.Arrester is can further improve on the basis of said structure connects sudden strain of a muscle generally
Rate, reduces the probability that lightning current directly discharges through blade body 10, prevents blade body 10 to be damaged.The lightning protection device includes edge
Multiple main arresters that the bearing of trend of blade is intervally arranged, each main arrester correspondence is furnished with multiple auxiliary arresters, each master
Arrester is distributed with corresponding multiple auxiliary arresters on blade body in isosceles triangle.
Certainly, the cause not of uniform size of blade body 10 in practical situations both, therefore need to set multiple main arresters 20 sometimes, and should
Multiple main arresters 20 are intervally arranged along the bearing of trend of blade body, and each main correspondence of arrester 20 connects sudden strain of a muscle equipped with multiple auxiliary
Device 30, makes each main arrester 20 be distributed with corresponding multiple auxiliary arresters 30 on blade body 10 in isosceles triangle.
Specifically on above-mentioned installation foundation, when auxiliary arrester 30 is installed around second main arrester 20, sudden strain of a muscle is connect with second master
Device 20 is vertex of a triangle, and the base of triangle is done with the horizontal chord length of blade body 10, with second main arrester 20 and the
The line of the wherein joining on a stringcourse and base of one isosceles triangle does stringcourse, that is, completes second main shape of arrester 20
Into isosceles triangle stringcourse, the cablings of same multiple auxiliary arresters 30 is along its stringcourse direction.
It is preferred that, main arrester 20 and auxiliary arrester 30 can be discoid, improve effectively connecing for arrester itself
Area is dodged, effect is more preferable.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (10)
1. a kind of lightning protection device of wind power blade, including blade body and the main arrester on blade body, it is special
Levy and be, in addition to multiple auxiliary arresters, aid in arrester to be provided with the first thermal insulation layer close to the part surface of blade body；
It is separated by form the first discharging gap between adjacent two auxiliary arrester, is separated by form second between main arrester and auxiliary arrester
Discharging gap, the lightning current that auxiliary arrester is received flows into main arrester, and main arrester is grounded by a downlead.
2. the lightning protection device of wind power blade as claimed in claim 1, it is characterised in that main arrester is close to the portion of blade body
Surface is divided to be provided with the second thermal insulation layer.
3. the lightning protection device of wind power blade as claimed in claim 2, it is characterised in that the second thermal insulation layer is existed by heat resisting temperature
More than 150 DEG C of heat-insulating material is made.
4. the lightning protection device of wind power blade as claimed in claim 1 or 2, it is characterised in that empty provided with radiating in main arrester
Chamber.
5. the lightning protection device of wind power blade as claimed in claim 1, it is characterised in that multiple auxiliary arresters are along blade body
Length direction uniform intervals be arranged in the both sides of main arrester.
6. the lightning protection device of wind power blade as claimed in claim 1, it is characterised in that main arrester and multiple auxiliary arresters
It is distributed on blade body in isosceles triangle, multiple auxiliary arrester uniform intervals are arranged in the stringcourse of the isosceles triangle
On, main arrester is located at the intersection point of the stringcourse of isosceles triangle two.
7. the lightning protection device of the wind power blade as described in claim 1 or 6, it is characterised in that the lightning protection device is included along blade
Multiple main arresters that the bearing of trend of main body is intervally arranged, each main arrester correspondence is furnished with multiple auxiliary arresters, each master
Arrester is distributed with corresponding multiple auxiliary arresters on blade body in isosceles triangle.
8. the lightning protection device of wind power blade as claimed in claim 1, it is characterised in that multiple auxiliary arresters are with main arrester
Centered on axis circumferentially array distribution.
9. the lightning protection device of wind power blade as claimed in claim 1, it is characterised in that main arrester is discoid.
10. the lightning protection device of the wind power blade as described in claim 1 or 9, it is characterised in that auxiliary arrester is discoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510694778.1A CN105134511B (en) | 2015-10-21 | 2015-10-21 | A kind of lightning protection device of wind power blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510694778.1A CN105134511B (en) | 2015-10-21 | 2015-10-21 | A kind of lightning protection device of wind power blade |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105134511A CN105134511A (en) | 2015-12-09 |
| CN105134511B true CN105134511B (en) | 2017-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510694778.1A Active CN105134511B (en) | 2015-10-21 | 2015-10-21 | A kind of lightning protection device of wind power blade |
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| CN (1) | CN105134511B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604812B (en) * | 2016-02-26 | 2018-10-12 | 北京金风科创风电设备有限公司 | Lightning receptor, blade lightning protection system and blade of wind generating set |
| DE102018009039A1 (en) * | 2018-11-19 | 2020-05-20 | Senvion Gmbh | Rotor blade of a wind turbine with an insulator layer and a protective layer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008123976A (en) * | 2006-10-16 | 2008-05-29 | Orient Sokki Computer Kk | Lightning conducting device, lightning preventive device, and lightning strike preventing system |
| CN201504017U (en) * | 2009-05-25 | 2010-06-09 | 成都桑莱特科技股份有限公司 | Lightning arrester |
| CN102918262A (en) * | 2011-12-09 | 2013-02-06 | 三菱重工业株式会社 | Windmill blade |
| GB2519332A (en) * | 2013-10-17 | 2015-04-22 | Vestas Wind Sys As | Improvements relating to lightning protection systems for wind turbine blades |
| CN205047374U (en) * | 2015-10-21 | 2016-02-24 | 北京乾源风电科技有限公司 | Lightning protection device of wind energy blade |
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| CN105134511A (en) | 2015-12-09 |
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