CN110165559B - Graphite lightning protection grounding device for wind turbine generator and construction method thereof - Google Patents
Graphite lightning protection grounding device for wind turbine generator and construction method thereof Download PDFInfo
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- CN110165559B CN110165559B CN201910462680.1A CN201910462680A CN110165559B CN 110165559 B CN110165559 B CN 110165559B CN 201910462680 A CN201910462680 A CN 201910462680A CN 110165559 B CN110165559 B CN 110165559B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 16
- 239000010439 graphite Substances 0.000 title claims abstract description 16
- 238000010276 construction Methods 0.000 title claims abstract description 10
- 239000004020 conductor Substances 0.000 claims abstract description 53
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000003610 charcoal Substances 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 238000005553 drilling Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000000615 nonconductor Substances 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 description 7
- 238000010248 power generation Methods 0.000 description 3
- 206010033799 Paralysis Diseases 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/30—Lightning protection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/22—Contacts for co-operating by abutting
- H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
- H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
- H01R13/2421—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means using coil springs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/64—Devices for uninterrupted current collection
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T19/00—Devices providing for corona discharge
- H01T19/04—Devices providing for corona discharge having pointed electrodes
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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
-
- 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)
- Chemical & Material Sciences (AREA)
- Plasma & Fusion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wind Motors (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
The invention discloses a graphite lightning protection grounding device for a wind turbine generator and a construction method thereof, relating to the field of lightning protection devices; the lightning arrester is installed at the top end of the blade, an annular groove is formed in the engine room, the annular conductor is rotatably installed in the annular groove, one end of the connecting body is fixedly connected with the root of the blade, the other end of the connecting body is fixedly connected with the annular conductor, cables are laid in the blade and the connecting body, one end of each cable is fixedly connected with the lightning arrester, and the other end of each cable is inserted into the annular groove and fixedly connected with the annular conductor; the annular conductor is provided with an annular groove on the surface opposite to the bottom of the annular groove, a lower guide body is installed in a rack fixedly connected to the bottom surface of the engine room, the bottom surface of the engine room is provided with a through groove communicated with the annular groove, the bottom ends of the rack and the lower guide body are fixedly connected with grounding equipment buried in the ground, a connecting conductor penetrating through the through groove and inserted into the annular groove is fixed at the top end of the lower guide body, and a slider conductor in sliding fit with the annular groove is rotationally arranged on the connecting conductor; the wind turbine generator set cannot be damaged.
Description
Technical Field
The invention relates to the field of lightning protection devices, in particular to a graphite lightning protection grounding device for a wind turbine generator and a construction method thereof.
Background
Wind energy is inexhaustible renewable energy, the power generation process of the wind energy cannot cause pollution and damage to the environment, wind power generation is also one of the current centralized main clean energy, a wind generating set is a device for converting the wind energy into electric energy, in order to ensure enough power generation, the wind generating set is generally large in size and high in height, the wind generating set is easy to be struck by lightning, the destructive power of the lightning strike in the nature is large, the internal elements of the set can be damaged under the condition that the wind generating set is directly hit, and the set is directly paralyzed, so that a lightning arrester needs to be installed on the wind generating set in the process of installing the wind generating set.
Traditional lightning arrester is directed the thunderbolt through the arrester on the wind-powered electricity generation blade, and rethread wire and carbon brush lead the electric current to wheel hub, and rethread wheel hub ground connection leads to the ground with the heavy current, but because the electric current is big, the carbon brush is the gyration friction state with the change oar bearing, and consequently the carbon brush can't guide the electric current direction completely, and this also leads to the electric current to puncture to become the oar bearing, constructs certain damage to change oar bearing and tie knot.
Disclosure of Invention
The invention designs a graphite lightning protection grounding device for a wind turbine generator and a construction method thereof, aiming at solving the problems that a carbon brush in a lightning protection mode of a traditional wind turbine generator cannot completely guide the current direction, a pitch bearing, a hub and the like are damaged, land is excavated in a large range during construction, the workload is large, and the like.
A graphite lightning protection grounding device for a wind turbine generator comprises a lightning receptor, a connector, an annular conductor, a lower guide body and grounding equipment, wherein the lightning receptor is installed at the top end of a blade of the wind turbine generator, an annular groove is formed in the surface, opposite to the blade, of a cabin of the wind turbine generator, the annular conductor is rotatably installed in the annular groove, one end of the connector is fixedly connected with the root of the blade, the other end of the connector is fixedly connected with the annular conductor, cables are laid in the blade and the connector, one end of each cable is fixedly connected with the lightning receptor, and the other end of each cable is inserted into the annular groove and fixedly connected with the annular conductor; the annular conductor is provided with an annular groove on the surface opposite to the bottom of the annular groove, the lower guide body is installed in a rack fixedly connected to the bottom surface of the engine room, the bottom surface of the engine room is provided with a through groove communicated with the annular groove, the rack is fixedly connected with the bottom end of the lower guide body and grounding equipment buried in the ground, a connecting conductor penetrating through the through groove and inserted into the annular groove is fixed at the top end of the lower guide body, and a slider conductor in sliding fit with the annular groove is installed on the connecting conductor; the connecting body and the engine room are both made of non-conductor materials.
Preferably, a lightning rod is installed on the nacelle, and the bottom end of the lightning rod is fixedly connected with the lower guide body.
Preferably, the connector comprises a bottom plate and a cover plate, the bottom plate and the cover plate are detachably connected, and the connecting surfaces of the bottom plate and the cover plate are provided with accommodating grooves for accommodating the cables.
Preferably, the notch of the annular groove is rotatably connected with an annular plate, and the annular plate is provided with a through hole for the connector to pass through.
Preferably, the joint of the annular plate and the annular groove and the through hole are provided with sealing rings.
Preferably, the slider conductor comprises a fixed body and a moving body, one surface of the fixed body is fixedly connected with the connecting conductor, the other surface of the fixed body is provided with a mounting groove, the groove wall of the mounting groove is provided with a sliding groove, and the outer surface of the moving body is fixedly provided with a sliding strip which is in sliding connection with the sliding groove; the movable body is characterized in that a guide pillar is fixedly connected to the bottom of the mounting groove, a limiting plate is fixedly connected to the end portion of the guide pillar, a slot is formed in the face, opposite to the bottom of the mounting groove, of the movable body, the guide pillar is in plug-in fit with the slot, a limiting ring for blocking the limiting plate is arranged on the notch of the slot, a spring is sleeved on the guide pillar, one end of the spring is fixedly connected with the notch of the slot, and the other end of the spring is fixedly connected with the bottom.
A construction method of a graphite lightning protection grounding device for a wind turbine generator system is characterized in that a grounding device comprises a plurality of vertical grounding bodies, a plurality of horizontal grounding bodies and a grounding ring, wherein the vertical grounding bodies and the horizontal grounding bodies are respectively provided with a plurality of connecting bodies, a lower guide body is fixedly connected with the plurality of horizontal grounding bodies through connecting bodies, the plurality of horizontal grounding bodies are uniformly distributed and are respectively fixedly connected with the grounding ring, the bottom surface of the grounding ring is fixedly connected with the plurality of vertical grounding bodies, and the vertical grounding bodies are uniformly distributed along the circumferential direction of the grounding ring; the method comprises the following steps:
firstly, digging a deep pit for installing the horizontal grounding body and the grounding ring according to the arrangement of the horizontal grounding body and the grounding ring, and then drilling a deep hole for deeply burying the vertical grounding body at the bottom of the pit by using a punching device according to the distribution of the vertical grounding body;
secondly, placing the vertical grounding body in the deep hole, then sequentially filling charcoal or a long-acting resistance reducing agent layer, a black soil or loess layer and a salt layer inwards, arranging a water injection pipe, injecting water, filling soil and tamping; the top part of the vertical grounding body for connection is exposed;
thirdly, sequentially paving a charcoal or long-acting resistance reducing agent layer, a black soil or yellow soil layer, a salt layer and a water injection pipe in the pit, then placing the horizontal grounding body and the grounding ring in the pit, connecting the vertical grounding body, the horizontal grounding body and the grounding ring, and then injecting water, filling soil and tamping; the part of the horizontal grounding body connected with the lower guide body is exposed;
and step four, connecting the horizontal grounding body with the lower guide body, and then filling and tamping.
Compared with the prior art, the invention has the advantages that:
1. according to the invention, lightning is led through the lightning receptor, and is led to the grounding equipment through the cable, the annular conductor and the lower guide body, and the whole leading process cannot pass through the internal units of the wind turbine such as a variable pitch bearing and a hub, so that the wind turbine cannot be damaged; the connecting body and the annular conductor are arranged, so that the connecting body and the annular conductor can rotate along with the blade, and the normal work of the wind turbine generator is not influenced;
2. the connecting body and the engine room are made of non-conductor materials, and thunder and lightning cannot be guided to the wind turbine generator, so that the wind turbine generator can completely guide the guidance of current and cannot be damaged;
3. the charcoal or the long-acting resistance reducing agent layer, the black soil or loess layer and the salt layer filled in the invention greatly reduce the resistivity of the soil and improve the conductivity;
4. the moving body of the sliding block conductor is always contacted with the groove bottom of the ring groove under the action of the spring, so that the sliding block conductor can be always conductive.
Drawings
FIG. 1 is a schematic view of a wind turbine according to the present invention;
FIG. 2 is a schematic diagram of the grounding device of the present invention;
FIG. 3 is a schematic view of the installation of the connector and annular conductor of the present invention;
FIG. 4 is a schematic view of a connector and loop conductor of the present invention;
FIG. 5 is a schematic view of a linker of the invention;
FIG. 6 is a schematic view of a slider conductor of the present invention.
The lightning arrester comprises a lightning arrester body, a connecting body, a sliding strip, a connecting body, a sliding block, a lightning rod, a base plate, a cover plate, a ring plate, a 14-ring plate, a vertical grounding body, a 16-horizontal grounding body, a grounding ring, a 18-fixing body, a 19-moving body, a guide column, a limiting plate, a 22 limiting ring and a 23-sliding strip, wherein the lightning arrester body is arranged on the upper portion of the lightning arrester body, the connecting body is arranged on the lower portion of the lightning arrester.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the attached drawings and the detailed implementation modes.
Examples
As shown in fig. 1 to 6, a graphite lightning protection grounding device for a wind turbine generator is characterized by comprising a lightning receptor 1, a connector 2, an annular conductor 3, a lower guide body 4 and a grounding device 5, wherein the lightning receptor 1 is installed at the top end of a blade 6 of the wind turbine generator, an annular groove is formed in a surface of a cabin 7 of the wind turbine generator, which is opposite to the blade 6, the annular conductor 3 is rotatably installed in the annular groove, one end of the connector 2 is fixedly connected with the root of the blade 6, the other end of the connector is fixedly connected with the annular conductor 3, cables 8 are respectively laid in the blade 6 and the connector 2, one end of each cable 8 is fixedly connected with the lightning receptor 1, and the other end of each cable is inserted into the annular groove and fixedly connected with the annular conductor 3; the annular conductor 3 is provided with an annular groove on the surface opposite to the bottom of the annular groove, the lower guide body 4 is installed in a rack fixedly connected to the bottom surface of the engine room 7, the bottom surface of the engine room 7 is provided with a through groove communicated with the annular groove, the rack is fixedly connected with the bottom end of the lower guide body 4 and a grounding device 5 buried at the ground bottom, the top end of the lower guide body 4 is fixedly provided with a connecting conductor 9 penetrating through the through groove and inserted into the annular groove, and the connecting conductor 9 is provided with a slider conductor 10 in sliding fit with the annular groove; the connecting body 2 and the nacelle 7 are both made of a non-conductive material.
The connector 2 comprises a bottom plate 12 and a cover plate 13, the bottom plate 12 and the cover plate 13 are detachably connected, and the connecting surfaces of the bottom plate and the cover plate 13 are provided with accommodating grooves for accommodating the cables 8.
The notch of the annular groove is rotatably connected with an annular plate 14, and a through hole for the connecting body 2 to pass through is formed in the annular plate 14.
And sealing rings are arranged at the joint of the annular plate 14 and the annular groove and at the through hole.
The slider conductor 10 comprises a fixed body 18 and a moving body 19, one surface of the fixed body 18 is fixedly connected with the connecting conductor 9, the other surface of the fixed body is provided with a mounting groove, the groove wall of the mounting groove is provided with a sliding groove, and the outer surface of the moving body 19 is fixedly provided with a sliding strip 23 which is in sliding connection with the sliding groove; the mounting groove structure comprises a mounting groove and a moving body 19, and is characterized in that a guide pillar 20 is fixedly connected to the bottom of the mounting groove, a limiting plate 21 is fixedly connected to the end portion of the guide pillar 20, a slot is formed in one side, opposite to the bottom of the mounting groove, of the moving body 19, the guide pillar 20 is in inserting fit with the slot, a limiting ring for blocking the limiting plate 21 is arranged at the notch of the slot, a spring is sleeved on the guide pillar 20, one end of the spring is fixedly connected with the notch of the slot, and the other.
A construction method of a graphite lightning protection grounding device for a wind turbine generator system is characterized in that a grounding device 5 comprises a vertical grounding body 15, horizontal grounding bodies 16 and a grounding ring 17, wherein the number of the vertical grounding body 15 and the number of the horizontal grounding bodies 16 are respectively multiple, a lower guide body 4 is fixedly connected with the number of the horizontal grounding bodies 16 through a connecting body 2, the number of the horizontal grounding bodies 16 are uniformly distributed and are respectively fixedly connected with the grounding ring 17, the bottom surface of the grounding ring 17 is fixedly connected with the number of the vertical grounding bodies 15, and the vertical grounding bodies 15 are uniformly distributed along the circumferential direction of the grounding ring 17; the method comprises the following steps:
firstly, digging a deep pit for installing the horizontal grounding body 16 and the grounding ring 17 according to the arrangement of the horizontal grounding body 16 and the grounding ring 17, and then drilling a deep hole for deeply burying the vertical grounding body 15 at the bottom of the pit by using a punching device according to the distribution of the vertical grounding body 15;
secondly, placing the vertical grounding body 15 in the deep hole, then sequentially filling charcoal or a long-acting resistance reducing agent layer, a black soil or loess layer and a salt layer inwards, arranging a water injection pipe, injecting water, filling soil and tamping; the top of the vertical grounding body 15 for connection is exposed;
thirdly, sequentially paving a charcoal or long-acting resistance reducing agent layer, a black soil or yellow soil layer, a salt layer and a water injection pipe in the pit, then placing the horizontal grounding body 16 and the grounding ring 17 in the pit, connecting the vertical grounding body 15, the horizontal grounding body 16 and the grounding ring 17, and then injecting water, filling soil and tamping; the part of the horizontal grounding body 16 connected with the lower guide body 4 is exposed;
and step four, connecting the horizontal grounding body 16 with the lower guide body 4, and then filling and tamping.
In this embodiment, a lightning rod 11 is mounted on the nacelle 7, and the bottom end of the lightning rod 11 is fixedly connected to the lower guide body 4.
The working process and principle are as follows: when the lightning arrester works, lightning is led through the lightning arrester 1, is guided to the annular conductor 3 through the cable 8, is guided to the lower guide body 4 through the slider conductor 10 and the connecting conductor 9, is guided to the grounding device 5, and is released in the ground through the grounding device 5; the annular conductor 3 and the connecting body 2 rotate along with the rotation of the blade 6, so that the normal use of the wind turbine is not influenced;
during construction, according to the arrangement of the horizontal grounding body 16 and the grounding ring 17, firstly digging a pit for installing the horizontal grounding body 16 and the grounding ring 17 at a position, then distributing the vertical grounding bodies 15, and drilling a deep hole for deeply burying the vertical grounding body 15 at the bottom of the pit by using a punching device; then the vertical grounding body 15 is placed in the deep hole, and then charcoal or long-acting resistance reducing agent layers, black soil or loess layers and salt layers are sequentially filled inwards, a water injection pipe is arranged, and water is injected, filled and tamped; the top of the vertical grounding body 15 for connection is exposed; sequentially paving a charcoal or long-acting resistance reducing agent layer, a black soil or yellow soil layer and a salt layer in the pit, arranging a water injection pipe, then placing the horizontal grounding body 16 and the grounding ring 17 in the pit, connecting the vertical grounding body 15, the horizontal grounding body 16 and the grounding ring 17, and then injecting water, filling soil and tamping; the part of the horizontal grounding body 16 connected with the lower guide body 4 is exposed; finally, the horizontal grounding body 16 is connected with the lower guide body 4, and then the filling soil is tamped.
Basically, the traditional lightning arrester is directed to fall the thunder through the lightning receptor on the wind power blade, and rethread wire and carbon brush lead to wheel hub with the electric current, and rethread wheel hub ground connection leads to the heavy current to ground, but because the electric current is big, the carbon brush is the gyration friction state with the change oar bearing, therefore the carbon brush can't guide the electric current direction completely, and this also leads to the electric current to puncture and becomes the oar bearing, constitutes certain damage to change oar bearing and tie-up.
The lightning is led through the lightning receptor 1 and led to the grounding device 5 through the cable 8, the annular conductor 3 and the lower guide body 4, and the whole leading process cannot pass through internal units of a wind turbine such as a variable pitch bearing, a hub and the like, so that the lightning cannot be damaged; the connecting body 2 and the annular conductor 3 are arranged to rotate along with the blade 6, so that the normal work of the wind turbine generator is not influenced; the connecting body 2 and the engine room are made of non-conductor materials, so that thunder and lightning cannot be guided to the wind turbine generator, the guiding of current can be guided completely, and the wind turbine generator cannot be damaged; the charcoal or the long-acting resistance reducing agent layer, the black soil or loess layer and the salt layer filled in the invention greatly reduce the resistivity of the soil and improve the conductivity; the moving body of the slider conductor 10 conductor of the invention is always contacted with the groove bottom of the ring groove under the action of the spring, thereby ensuring that the moving body can be always conducted.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A graphite lightning protection grounding device for a wind turbine generator is characterized by comprising a lightning receptor (1), a connector (2), an annular conductor (3), a lower guide body (4) and grounding equipment (5), the lightning receptor (1) is arranged at the top end of the blade (6) of the wind turbine generator, an annular groove is arranged on the surface of the engine room (7) of the wind turbine generator opposite to the blade (6), the annular conductor (3) is rotatably arranged in the annular groove, one end of the connecting body (2) is fixedly connected with the root part of the blade (6), the other end of the connecting body is fixedly connected with the annular conductor (3), the blade (6) and the connecting body (2) are internally laid with cables (8), one end of the cable (8) is fixedly connected with the lightning arrester (1), and the other end of the cable is inserted into the annular groove and fixedly connected with the annular conductor (3); the annular conductor (3) and the opposite side of the groove bottom of the annular groove are provided with annular grooves, the lower guide body (4) is fixedly connected in a rack on the bottom surface of the engine room (7), the bottom surface of the engine room (7) is provided with a through groove communicated with the annular groove, the rack is fixedly connected with the bottom end of the lower guide body (4) and grounding equipment (5) buried at the ground bottom, the top end of the lower guide body (4) is fixedly provided with a connecting conductor (9) penetrating through the through groove and inserted into the annular groove, and the connecting conductor (9) is provided with a slider conductor (10) in sliding fit with the annular grooves; the connecting body (2) and the engine room (7) are both made of non-conductor materials.
2. The graphite lightning protection grounding device for the wind turbine generator system according to claim 1, wherein a lightning rod (11) is installed on the engine room (7), and the bottom end of the lightning rod (11) is fixedly connected with the lower guide body (4).
3. The graphite lightning protection grounding device for the wind turbine generator system according to claim 1, wherein the connecting body (2) comprises a bottom plate (12) and a cover plate (13), the bottom plate (12) and the cover plate (13) are detachably connected, and the connecting surfaces of the bottom plate and the cover plate are provided with accommodating grooves for accommodating the cables (8).
4. The graphite lightning protection grounding device for the wind turbine generator system according to claim 1, wherein a ring plate (14) is rotatably connected to a notch of the ring groove, and a through hole for the connection body (2) to pass through is formed in the ring plate (14).
5. The graphite lightning protection grounding device for the wind turbine generator system according to claim 4, wherein sealing rings are arranged at the connection position of the annular plate (14) and the annular groove and at the through hole.
6. The graphite lightning protection grounding device for the wind turbine generator set according to claim 1, wherein the slider conductor (10) comprises a fixed body (18) and a moving body (19), one surface of the fixed body (18) is fixedly connected with the connecting conductor (9), the other surface of the fixed body is provided with an installation groove, the wall of the installation groove is provided with a sliding groove, and the outer surface of the moving body (19) is fixed with a sliding strip (23) which is slidably connected with the sliding groove; the mounting groove structure is characterized in that a guide pillar (20) is fixedly connected to the bottom of the mounting groove, a limiting plate (21) is fixedly connected to the end portion of the guide pillar (20), a slot is formed in one side, opposite to the bottom of the mounting groove, of the moving body (19), the guide pillar (20) is in plug-in fit with the slot, a limiting ring for blocking the limiting plate (21) is arranged at the notch of the slot, a spring is sleeved on the guide pillar (20), one end of the spring is fixedly connected with the slot notch of the slot, and the other end of the spring is fixedly connected with the.
7. The construction method of the graphite lightning protection grounding device for the wind turbine generator set according to claim 5, wherein the grounding device (5) comprises a vertical grounding body (15), a horizontal grounding body (16) and a grounding ring (17), the number of the vertical grounding body (15) and the number of the horizontal grounding body (16) are respectively provided, the lower guiding body (4) is fixedly connected with the number of the horizontal grounding body (16) through a connecting body (2), the number of the horizontal grounding body (16) is uniformly distributed and is fixedly connected with the grounding ring (17), the number of the vertical grounding body (15) is fixedly connected to the bottom surface of the grounding ring (17), and the number of the vertical grounding body (15) is uniformly distributed along the circumferential direction of the grounding ring (17); the method is characterized by comprising the following steps:
firstly, digging a deep pit for installing the horizontal grounding body (16) and the grounding ring (17) according to the arrangement of the horizontal grounding body (16) and the grounding ring (17), and then drilling a deep hole for deeply burying the vertical grounding body (15) at the bottom of the pit by using a punching device according to the distribution of the vertical grounding body (15);
secondly, placing the vertical grounding body (15) in the deep hole, then sequentially filling charcoal or a long-acting resistance reducing agent layer, black soil or loess layer, a salt layer, a water injection pipe, and filling water, filling soil and tamping; the top part of the vertical grounding body (15) for connection is exposed;
thirdly, sequentially paving a charcoal or long-acting resistance reducing agent layer, a black soil or loess layer and a salt layer in the pit, arranging a water injection pipe, then placing the horizontal grounding body (16) and the grounding ring (17) in the pit, connecting the vertical grounding body (15), the horizontal grounding body (16) and the grounding ring (17), and then injecting water, filling soil and tamping; the part of the horizontal grounding body (16) connected with the lower guide body (4) is exposed;
and step four, connecting the horizontal grounding body (16) with the lower guide body (4), and then filling and tamping.
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| CN1070288A (en) * | 1991-08-31 | 1993-03-24 | 辽阳电务段电器厂 | Graphite lightning protection grounding device and manufacturing and construction method thereof |
| CN201829944U (en) * | 2010-10-22 | 2011-05-11 | 辽宁电力勘测设计院 | Grounding-for-lightning device for wind turbine in wind power field |
| CN102900630A (en) * | 2012-10-26 | 2013-01-30 | 南车株洲电力机车研究所有限公司 | Lightning protection method and device for wind generating set |
| CN103603775A (en) * | 2013-11-22 | 2014-02-26 | 北京金风科创风电设备有限公司 | Lightning protection device, direct-drive wind generating set and lightning protection method thereof |
| CN108571427A (en) * | 2018-04-19 | 2018-09-25 | 安徽六和同心风能设备有限公司 | A kind of wind power generating set lightning protection device |
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- 2019-05-30 CN CN201910462680.1A patent/CN110165559B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070288A (en) * | 1991-08-31 | 1993-03-24 | 辽阳电务段电器厂 | Graphite lightning protection grounding device and manufacturing and construction method thereof |
| CN201829944U (en) * | 2010-10-22 | 2011-05-11 | 辽宁电力勘测设计院 | Grounding-for-lightning device for wind turbine in wind power field |
| CN102900630A (en) * | 2012-10-26 | 2013-01-30 | 南车株洲电力机车研究所有限公司 | Lightning protection method and device for wind generating set |
| CN103603775A (en) * | 2013-11-22 | 2014-02-26 | 北京金风科创风电设备有限公司 | Lightning protection device, direct-drive wind generating set and lightning protection method thereof |
| CN108571427A (en) * | 2018-04-19 | 2018-09-25 | 安徽六和同心风能设备有限公司 | A kind of wind power generating set lightning protection device |
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