CN112727711A - Lightning protection device for wind driven generator blade - Google Patents
Lightning protection device for wind driven generator blade Download PDFInfo
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- CN112727711A CN112727711A CN202110003443.6A CN202110003443A CN112727711A CN 112727711 A CN112727711 A CN 112727711A CN 202110003443 A CN202110003443 A CN 202110003443A CN 112727711 A CN112727711 A CN 112727711A
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- blade
- cable
- lightning
- insulating
- protection device
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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
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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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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
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- 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 device for a blade of a wind driven generator, which comprises a blade tip lightning receptor arranged at the blade tip of the wind driven generator, wherein the blade tip lightning receptor is connected with a lightning protection system of the wind driven generator through a cable, a heat shrink tube is wrapped outside the cable, an insulating sleeve is arranged at the joint of the blade tip lightning receptor and the cable, and the insulating sleeve wraps the part, connected with the cable, of the tail part of the blade tip lightning receptor. This aerogenerator blade lightning protection device can reduce the electrical connection part among the wind-powered electricity generation blade lightning protection system and connect the sudden strain of a muscle, leads to the risk that the blade body received the thunder and lightning breakdown.
Description
Technical Field
The invention relates to the technical field of wind power blade lightning protection, in particular to a lightning protection device for a wind driven generator blade.
Background
At present, all aerogenerator blades contain lightning protection systems, and lightning protection systems mainly comprise lightning receptors arranged on the surfaces of the blades and internal wires of the blade bodies, all the lightning receptors are connected with the wires, the wires are provided with interfaces of the complete machine at blade roots, and the lightning receptors receive thunder and lightning and are connected to the lightning protection systems of the complete machine through the wires, so that the glass fiber reinforced plastics of the blade bodies are prevented from being struck by lightning.
The fan is generally installed in wide plains, semi-hilly areas and mountain tops, forms obvious convex objects and is easy to be struck by lightning. If the lightning protection system is unreasonable in design, damage such as blade breakdown, burning and explosion can be easily caused, and the safety of the fan blade is directly influenced. The existing lightning protection system for the fan blade is insufficient in insulating property of an internal metal part, particularly insufficient in insulating property of an electrical connection part, and low in lightning receiving efficiency.
Disclosure of Invention
The invention mainly aims to provide a lightning protection device for a wind driven generator blade, which is used for reducing the risk that a blade body is broken down by lightning caused by lightning receiving of an electrical connection part in a lightning protection system of the wind driven generator blade.
In order to achieve the purpose, the invention provides a lightning protection device for a blade of a wind driven generator, which comprises a blade tip lightning receptor arranged at the blade tip of the wind driven generator, wherein the blade tip lightning receptor is connected with a lightning protection system of the wind driven generator through a cable.
Furthermore, the blade tip lightning receiving device comprises an aluminum blade tip, the head of the aluminum blade tip is exposed at the most tip end of the wind power blade, the tail of the aluminum blade tip is embedded into the wind power blade, the cable is connected with the tail of the aluminum blade tip, and the insulating sleeve wraps the tail of the aluminum blade tip and the joint of the cable and the tail of the aluminum blade tip.
Further, the blade lightning protection device further comprises a first blade lightning receiving device, the first blade lightning receiving device is fixed in the cavity of the wind power blade, the first blade lightning receiving device is directly connected with a cable, and the joint of the first blade lightning receiving device and the cable is wrapped in an insulating mode through a first insulating box.
Further, first blade lightning arrester includes first conducting block, and first conducting block is fixed in the cavity of wind-powered electricity generation blade, and the one end of first conducting block exposes from the blade of wind-powered electricity generation blade, and the cable passes through a closing device fixed connection on first conducting block, first insulating box parcel first conducting block and first closing device.
Furthermore, the blade lightning protection device further comprises a second blade lightning receiving device, the second blade lightning receiving device is fixed in the cavity of the wind power blade and is connected with the cable through a branch cable, the junction of the second blade lightning receiving device and the branch cable is wrapped in a second insulation box in an insulation mode, and the junction of the branch cable and the cable is wrapped in a third insulation box in an insulation mode.
Further, the second blade body lightning receiving device comprises a second conductive block, the second conductive block is fixed in the cavity of the wind power blade, one end of the second conductive block is exposed out of the blade body of the wind power blade, the branch cable is fixedly connected onto the second conductive block through a second pressing device, and the second insulating box wraps the second conductive block and the second pressing device.
Furthermore, the branch cable is connected with the cable through a wire doubling device, and the third insulating box is used for insulating and wrapping the wire doubling device.
Further, the quantity of second blade body lightning arrester is a plurality of, and a plurality of second blade body lightning arresters set up along wind-powered electricity generation blade's blade length direction interval.
Furthermore, the insulating sleeve, the first insulating box, the second insulating box and the third insulating box are all made of non-metal composite insulating materials.
By applying the technical scheme of the invention, the outside of the cable is wrapped by the heat-shrinkable tube, and the insulating sleeve is arranged at the position where the blade tip lightning receiving device is connected with the cable for insulating and wrapping, so that the insulating property of the connection part of the blade tip lightning receiving device and the cable is improved; the first insulation box is adopted to carry out insulation wrapping on the connection position of the first blade lightning receiving device and the cable, so that the insulation performance of the connection position of the first blade lightning receiving device and the cable is improved; the joint of the second blade body lightning receiving device and the branch cable is wrapped in an insulating mode through the second insulating box, and the joint of the branch cable and the cable is wrapped in an insulating mode through the third insulating box, so that the insulating performance of the joint of the second blade body lightning receiving device is improved; therefore, the direct conduction of metal pieces inside the blade and thunder is avoided, the risk that the thunder breaks through the blade is reduced, and meanwhile, the reliability of the connecting part is improved.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a lightning protection device for a wind turbine blade according to the present invention.
FIG. 2 is a schematic structural diagram of a blade tip lightning arrester in the lightning arrester for a wind turbine blade according to the present invention.
Fig. 3 is a schematic connection diagram of a first blade lightning arrester and a cable in the lightning protection device for a wind turbine blade according to the present invention.
Fig. 4 is a schematic view of the lightning protection device for a wind turbine blade, in which the first insulation box wraps the first blade lightning receptor and the cable connection.
FIG. 5 is a schematic view of the connection between the second blade lightning arrester and the cable in the lightning protection device for wind turbine blades according to the present invention.
Fig. 6 is a schematic diagram of a lightning protection device for a blade of a wind turbine generator, in which a second insulating box wraps a joint of a second conductive block and a branch cable, and a third insulating box wraps a joint of the branch cable and the cable.
Wherein the figures include the following reference numerals:
1. a blade tip lightning receptor; 2. a cable; 3. heat shrink tubing; 4. an insulating sleeve; 5. a first body lightning receptor; 6. a first insulating case; 7. a second blade lightning receptor; 8. a branch cable; 9. a second insulating case; 10. a third insulating case; 11. a doubling device; 100. wind power blades; 101. an aluminum blade tip; 501. a first conductive block; 502. a first pressing device; 701. a second conductive block; 702. and a second pressing device.
Detailed Description
In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The use of "first," "second," and similar terms in the description and in the claims of the present application do not denote any order, quantity, or importance, but rather the intention is to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Referring to fig. 1 to 6, a lightning protection device for a blade of a wind power generator according to an embodiment of the present invention mainly includes a blade tip lightning receptor 1 disposed at a blade tip of a wind power blade 100, the blade tip lightning receptor 1 is connected to a lightning protection system (not shown) of the wind power generator through a cable 2, a heat shrink tube 3 is wrapped outside the cable 2, an insulating sleeve 4 is disposed at a connection position of the blade tip lightning receptor 1 and the cable 2, and the insulating sleeve 4 wraps a portion of the tail of the blade tip lightning receptor 1 connected to the cable 2.
According to the lightning protection device for the blade of the wind driven generator, the cable 2 is wrapped by the heat shrink tube 3, and the insulating sleeve 4 is arranged at the connecting part of the blade tip lightning receiving device 1 and the cable 2 for insulating and wrapping, so that the insulating property of the connecting part of the blade tip lightning receiving device 1 and the cable 2 is improved, the direct conduction of metal parts inside the blade and lightning is avoided, the risk of the lightning for breaking through the blade is reduced, and the reliability of the connecting part is improved; the cable 2 is externally wrapped by the heat shrink tube 3, so that the safety of the core wire of the cable 2 under the high lightning impulse voltage is improved.
Specifically, referring to fig. 2, in the present embodiment, the blade tip lightning receptor 1 includes an aluminum blade tip 101, a head of the aluminum blade tip 101 is exposed at a most tip end of the wind turbine blade 100, a tail of the aluminum blade tip 101 is embedded in the wind turbine blade 100, the cable 2 is connected to the tail of the aluminum blade tip 101 to form a current path, and the insulating sheath 4 covers the tail of the aluminum blade tip 101 and a connection portion of the cable 2 and the tail of the aluminum blade tip 101. Due to the arrangement, the blade shell at the blade tip part is thin, so that the blade is easy to be broken down by lightning; moreover, when the aluminum blade tip 101 is exposed in the air, the resistance increases after the surface is corroded and passivated with the lapse of time, so that the lightning performance of the exposed part of the aluminum blade tip 101 is reduced, and the probability of lightning connection between the tail part of the aluminum blade tip 101 and the cable 2 is increased; the insulating sleeve 4 is arranged at the joint of the tail of the aluminum blade tip 101 and the cable 2 for insulating and wrapping, so that the insulating property of the tail of the aluminum blade tip 101 can be effectively improved, and the risk of lightning breakdown of the blade is effectively reduced.
Referring to fig. 3 and 4, in this embodiment, the blade lightning protection device further includes a first blade lightning receptor 5, the first blade lightning receptor 5 is fixed in the blade cavity of the wind turbine blade 100, the first blade lightning receptor 5 is directly connected to the cable 2 to form a current path, and the connection between the first blade lightning receptor 5 and the cable 2 is covered by an insulating box 6. Set up like this, carry out insulating parcel through first insulating box 6 to the junction of first blade lightning arrester 5 and cable 2, can improve the insulating properties of this junction, reduce the risk that the thunder and lightning punctures the blade from this blade.
Specifically, referring to fig. 3 and fig. 4, in the present embodiment, the first blade lightning receiving device 5 includes a first conductive block 501, the first conductive block 501 is fixed in the blade cavity of the wind turbine blade 100, one end of the first conductive block 501 is exposed from the blade of the wind turbine blade 100, the cable 2 is fixedly connected to the first conductive block 501 through a first pressing device 502, and the first insulating box 6 wraps the first conductive block 501 and the first pressing device 502. The first lightning receptor 5 is a case where the first conductive block 501 is directly connected to the cable 2.
Referring to fig. 5 and 6, in the present embodiment, the blade lightning protection device further includes a second blade lightning receptor 7, the second blade lightning receptor 7 is fixed in the blade cavity of the wind turbine blade 100, the second blade lightning receptor 7 is connected to the cable 2 through a branch cable 8, the junction of the second blade lightning receptor 7 and the branch cable 8 is wrapped in an insulating manner through a second insulating box 9, and the junction of the branch cable 8 and the cable 2 is wrapped in an insulating manner through a third insulating box 10. So set up, carry out insulating parcel through the second insulation box 9 to the junction of second blade lightning arrester 7 and branch cable 8, carry out insulating parcel through the third insulation box 10 to the junction of branch cable 8 and cable 2, can improve the insulating properties of these two junctions, further reduce the risk that the thunder and lightning punctures the blade from blade.
Specifically, referring to fig. 5 and fig. 6, in this embodiment, the second blade lightning receptor 7 includes a second conductive block 701, the second conductive block 701 is fixed in the blade cavity of the wind turbine blade 100, one end of the second conductive block 701 is exposed from the blade of the wind turbine blade 100, the branch cable 8 is fixedly connected to the second conductive block 701 through a second pressing device 702, and the second insulating box 9 wraps the second conductive block 701 and the second pressing device 702; the branch cable 8 is connected to the cable 2 by a C-shaped doubling device 11, and a third insulation box 10 is insulated from the doubling device 11. The second blade lightning arrester 7 is a case where the second conductive block 701 is indirectly connected to the cable 2 via the branch cable 8.
Further, referring to fig. 1, in the present embodiment, the number of the second blade lightning receptors 7 is multiple, and the multiple second blade lightning receptors 7 are arranged at intervals along the length direction of the blade body of the wind power blade 100. First blade lightning receptor 5 sets up between second blade lightning receptor 7 and apex lightning receptor 1 and sets up with second blade lightning receptor 7 and apex lightning receptor 1 interval.
Specifically, in the present embodiment, the insulating sheath 4, the first insulating case 6, the second insulating case 9, and the third insulating case 10 are all non-metallic composite insulating material members. The matrix resin of the non-metal composite insulating material adopts one or more of polypropylene, polyethylene, polyformaldehyde, thermoplastic polyester, polyamide, caprolactam, polyphenyl ether, polyether-ether-ketone, polyether-ketone, unsaturated resin, polyurethane, epoxy resin, vinyl resin, natural rubber, nitrile rubber, chloroprene rubber and silica gel; the matrix resin is compounded with the flame retardant to form the composite material with remarkable flame retardant and insulation properties. Wherein the flame retardant is antimony trioxide, aluminum hydroxide hydrate, zinc borate, antimony oxide/silicon oxide compound, barium metaborate, pentabromoethylbenzene, bromodiphenyl ether, chlorinated paraffin, trimethyl phosphate, tricresyl phosphate, etc. The non-metal composite insulating material can adopt the existing material.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a aerogenerator blade lightning protection device, is including apex lightning arrester (1) of locating the apex department of wind-powered electricity generation blade (100), apex lightning arrester (1) is connected with aerogenerator's lightning protection system through cable (2), its characterized in that, the outside parcel of cable (2) has pyrocondensation pipe (3), apex lightning arrester (1) with the junction of cable (2) is equipped with insulating cover (4), insulating cover (4) parcel is lived the afterbody of apex lightning arrester (1) with the position that cable (2) are connected.
2. The lightning protection device for the blade of the wind driven generator according to claim 1, wherein the blade tip lightning arrester (1) comprises an aluminum blade tip (101), the head of the aluminum blade tip (101) is exposed at the most pointed end of the wind driven generator (100), the tail of the aluminum blade tip (101) is embedded into the wind driven generator (100), the cable (2) is connected with the tail of the aluminum blade tip (101), and the insulating sleeve (4) wraps the tail of the aluminum blade tip (101) and the joint of the cable (2) and the tail of the aluminum blade tip (101).
3. The lightning protection device for the blade of the wind driven generator according to claim 1, further comprising a first blade lightning arrester (5), wherein the first blade lightning arrester (5) is fixed in the cavity of the wind power blade (100), the first blade lightning arrester (5) is directly connected with the cable (2), and the joint of the first blade lightning arrester (5) and the cable (2) is wrapped in an insulating manner by a first insulating box (6).
4. The lightning protection device for the blade of the wind driven generator according to claim 3, wherein the first blade lightning receiving device (5) comprises a first conductive block (501), the first conductive block (501) is fixed in the cavity of the wind power blade (100), one end of the first conductive block (501) is exposed out of the blade of the wind power blade (100), the cable (2) is fixedly connected to the first conductive block (501) through a first pressing device (502), and the first insulating box (6) wraps the first conductive block (501) and the first pressing device (502).
5. The lightning protection device for the blade of the wind driven generator according to claim 4, further comprising a second blade lightning arrester (7), wherein the second blade lightning arrester (7) is fixed in the cavity of the wind power blade (100), the second blade lightning arrester (7) is connected with the cable (2) through a branch cable (8), the joint of the second blade lightning arrester (7) and the branch cable (8) is insulated and wrapped by a second insulation box (9), and the joint of the branch cable (8) and the cable (2) is insulated and wrapped by a third insulation box (10).
6. The lightning protection device for the blade of the wind driven generator according to claim 5, wherein the second blade lightning arrester (7) comprises a second conductive block (701), the second conductive block (701) is fixed in the cavity of the wind power blade (100), one end of the second conductive block (701) is exposed out of the blade body of the wind power blade (100), the branch cable (8) is fixedly connected to the second conductive block (701) through a second pressing device (702), and the second insulating box (9) wraps the second conductive block (701) and the second pressing device (702).
7. Wind turbine blade lightning protection device according to claim 6, characterised in that the branch cable (8) is connected to the cable (2) by a doubling device (11), the third insulating box (10) being insulated around the doubling device (11).
8. Wind turbine blade lightning protection device according to any one of claims 5 to 7, wherein the number of the second blade body lightning receptor devices (7) is plural, and a plurality of the second blade body lightning receptor devices (7) are arranged at intervals along the length direction of the blade body of the wind turbine blade (100).
9. Wind turbine blade lightning protection device according to any of claims 5 to 7, characterised in that the insulating sheath (4), the first insulating box (6), the second insulating box (9) and the third insulating box (10) are all made of non-metallic composite insulating material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110003443.6A CN112727711A (en) | 2021-01-04 | 2021-01-04 | Lightning protection device for wind driven generator blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110003443.6A CN112727711A (en) | 2021-01-04 | 2021-01-04 | Lightning protection device for wind driven generator blade |
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| CN202110003443.6A Pending CN112727711A (en) | 2021-01-04 | 2021-01-04 | Lightning protection device for wind driven generator blade |
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