CN116292070A - Blade and wind generating set - Google Patents
Blade and wind generating set Download PDFInfo
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- CN116292070A CN116292070A CN202211520980.9A CN202211520980A CN116292070A CN 116292070 A CN116292070 A CN 116292070A CN 202211520980 A CN202211520980 A CN 202211520980A CN 116292070 A CN116292070 A CN 116292070A
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- 230000015556 catabolic process Effects 0.000 claims abstract description 28
- 238000007599 discharging Methods 0.000 claims description 77
- 239000004020 conductor Substances 0.000 claims description 27
- 230000000712 assembly Effects 0.000 claims description 13
- 238000000429 assembly Methods 0.000 claims description 13
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 10
- 229920000049 Carbon (fiber) Polymers 0.000 description 8
- 239000004917 carbon fiber Substances 0.000 description 8
- 239000003365 glass fiber Substances 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000009021 linear effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 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
- 238000011084 recovery Methods 0.000 description 1
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Classifications
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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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
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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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/0608—Rotors characterised by their aerodynamic shape
- F03D1/0633—Rotors characterised by their aerodynamic shape of the blades
- F03D1/0641—Rotors characterised by their aerodynamic shape of the blades of the section profile of the blades, i.e. aerofoil profile
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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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
-
- 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
-
- 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
-
- 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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- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
The application relates to a blade and wind generating set, the blade includes the blade body, lightning protection subassembly and discharge the subassembly, the blade body is including the shell that has the inner chamber, the regional first conductive path that is formed with of at least part of shell, lightning protection subassembly sets up in the blade body and is formed with the second conductive path that is used for transmitting the thunder current, the second conductive path sets up with first conductive path is parallel, discharge the subassembly and be connected with at least one of shell and lightning protection subassembly, in order to form the discharge gap between first conductive path and second conductive path, the breakdown voltage of discharge gap is less than the breakdown voltage of shell. The blade in this application embodiment can prevent to break down the shell in, has reduced the electric current quantity of conduction to the blade body, guarantees the safe operation of blade.
Description
Technical Field
The application relates to the technical field of wind power, in particular to a blade and a wind generating set.
Background
The blade in wind generating set receives the thunderbolt easily, and current blade often is provided with lightning protection subassembly, through the ground connection of lightning protection subassembly, realizes the discharge of blade.
The outer shell of the blade is provided with conductive fibers, and when lightning current is conducted on the lightning protection component, current is induced on the conductive fibers of the blade, and a conductive path is formed on the conductive fibers. When the potential difference between the conductive paths of the conductive fibers and the conductive paths of the lightning protection component is large, electric breakdown easily occurs between the conductive paths of the conductive fibers and the conductive paths of the lightning protection component, so that the shell is damaged, the strength of the blade is reduced, and the safe operation of the blade is influenced.
Disclosure of Invention
The embodiment of the application provides a blade and wind generating set, can prevent to break down the shell in the time, reduced the electric current quantity of conduction to the blade body, guarantee the safe operation of blade.
In one aspect, according to an embodiment of the present application, there is provided a blade, including: a blade body including a housing having an interior cavity, at least a partial region of the housing being formed with a first conductive path; the lightning protection assembly is arranged on the blade body and is provided with a second conductive path for transmitting lightning current, and the second conductive path is arranged in parallel with the first conductive path; and a discharge assembly connected with at least one of the housing and the lightning protection assembly to form a discharge gap between the first conductive path and the second conductive path, the discharge gap having a breakdown voltage less than that of the housing.
According to one aspect of the embodiment of the application, the lightning protection component extends along the length direction of the blade body, the number of the discharge components is one, the blade body is provided with a blade tip section and a blade root section along the length direction, and the discharge components are arranged on the blade tip section or She Genduan; or, the number of the discharge components is more than two, and the more than two discharge components are arranged between the shell and the lightning protection component along the length direction at intervals.
According to one aspect of embodiments of the present application, the lightning protection assembly includes at least one of a conductive mesh and a down conductor; the discharging assembly comprises a first discharging module and/or a second discharging module, wherein the first discharging module is used for forming a discharging gap between the conductive net and the shell, and the second discharging module is used for forming a discharging gap between the down conductor and the shell.
According to one aspect of the embodiments of the present application, the conductive mesh and the down conductor are disposed contiguous in the length direction.
According to an aspect of the embodiments of the present application, in the length direction, the conductive mesh is disposed at least partially overlapping the down conductor; at least part of the first discharging module and the second discharging module are arranged in a staggered mode in the length direction in the overlapping area of the conductive net and the down conductor.
According to an aspect of the embodiments of the present application, the breakdown voltage of the discharge gap formed by the at least two discharge elements is different in the length direction.
According to one aspect of the embodiments of the present application, the discharging assembly includes a first discharging portion, one end of the first discharging portion is connected with one of the blade body and the lightning protection assembly, and the other end extends toward the other of the blade body and the lightning protection assembly and forms a discharging gap with the other.
According to an aspect of the embodiments of the present application, the discharging assembly includes a second discharging portion and a third discharging portion, one ends of the second discharging portion and the third discharging portion are respectively connected with the blade body and the lightning protection assembly, and the other ends of the second discharging portion and the third discharging portion are disposed opposite to each other and form a discharging gap.
According to one aspect of embodiments of the present application, the discharge assembly further includes a fourth discharge portion connected to the blade body and extending at least partially into the discharge gap to separate the discharge gap to form a first sub-gap and a second sub-gap.
According to an aspect of the embodiments of the present application, the end portion of the discharge assembly to form the discharge gap is provided as at least one of a columnar structure, a needle-like structure, a spherical structure, and a plate-like structure.
According to one aspect of an embodiment of the present application, the discharge gap is filled with a dielectric, the dielectric being provided as air; or, the blade further comprises a containing piece, the containing piece is at least partially sleeved on the periphery of the discharge assembly and coats the discharge gap, the dielectric medium is filled in the containing piece, and the dielectric medium is at least one of water, insulating oil and zinc oxide.
According to one aspect of embodiments of the present application, the blade body further includes a web disposed within the cavity and connected to the housing, and the receptacle and the discharge assembly are at least partially connected to the web.
In another aspect, a wind generating set according to an embodiment of the present application includes the blade in the above embodiment.
The blade that this application embodiment provided, including blade body, lightning protection subassembly and with the blade body and the at least subassembly of discharging that is connected of lightning protection subassembly, the at least partial region of the shell of blade body is formed with first conductive path, and lightning protection part is formed with the second conductive path that is used for transmitting the thunder current, and first conductive path and second conductive path parallel arrangement. The discharge assembly is provided with a discharge gap between the first conductive path and the second conductive path, and the breakdown voltage of the discharge gap is smaller than that of the shell, so that in the process of conducting lightning current on the second conductive path, if the potential difference between the first conductive path and the second conductive path is large, the lightning current can be guided to discharge from the position of the discharge gap, the shell is prevented from being broken down, and the safety of the blade is ensured. Meanwhile, after discharging through the discharge gap, the potential difference between the first conductive path and the second conductive path is gradually reduced, and when the potential difference is smaller than the breakdown voltage of the discharge gap, the first conductive path and the second conductive path are disconnected, namely lightning current is not conducted to the blade body any more, so that the amount of current conducted to the blade body is reduced, and safe operation of the blade is further ensured.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a blade according to one embodiment of the present application;
FIG. 2 is a cross-sectional view of a blade provided in one embodiment of the present application;
FIG. 3 is a schematic diagram of an arrangement of discharge assemblies provided in one embodiment of the present application;
FIG. 4 is a cross-sectional view of a blade provided by another embodiment of the present application;
FIG. 5 is a schematic diagram of an arrangement of discharge assemblies provided in another embodiment of the present application;
FIG. 6 is a cross-sectional view of a blade provided by yet another embodiment of the present application;
FIG. 7 is a cross-sectional view of a blade provided by yet another embodiment of the present application;
FIG. 8 is a cross-sectional view of a blade provided by yet another embodiment of the present application;
FIG. 9 is a cross-sectional view of a blade provided by yet another embodiment of the present application;
FIG. 10 is a cross-sectional view of a blade provided by yet another embodiment of the present application;
FIG. 11 is a cross-sectional view of a blade provided by yet another embodiment of the present application;
FIG. 12 is a cross-sectional view of a blade provided by yet another embodiment of the present application;
fig. 13 is a schematic structural view of a wind turbine generator system according to an embodiment of the present disclosure.
Wherein:
100-leaf blades; 200-nacelle; 300-tower;
1-a blade body; 11-a housing; 12-a support; 2-a lightning protection component; 21-a conductive mesh; 22-down-lead; a 23-receiver; 3-a discharge assembly; 31-a first discharge section; 32-a second discharge section; 33-a third discharge section; 34-a fourth discharge section; 4-a receiving member;
s1, a first discharging module; s2-a second discharging module;
x-length direction.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
Detailed Description
Features and exemplary embodiments of various aspects of the present application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing an example of the present application. In the drawings and the following description, at least some well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The azimuth terms appearing in the following description are all directions shown in the drawings, and are not intended to limit the specific structures of the blade and the wind generating set of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.
Considering that the blade is susceptible to lightning strike, existing blades are often provided with lightning protection components that are formed with conductive paths and ground settings to transmit lightning current and achieve discharge of the blade. However, with existing blade constructions, as the length of the blade increases, the outer shell of the blade often incorporates different types of fibers, such as glass fibers and carbon fibers, to meet the strength and weight saving requirements of the blade. Since the carbon fibers are conductive fibers, when lightning current is conducted on the conductive path of the lightning protection assembly, current is induced on the carbon fibers of the housing and a conductive path is formed on the housing.
At the same cross section department of blade, there is the potential difference between the conduction path on the shell and the conduction path of lightning protection subassembly, when the potential difference is great, appears electric breakdown easily between the conduction path of both, and the glass fiber that causes the blade appears damaging, reduces the intensity of blade, influences the safe operation of blade.
Therefore, the existing blade often directly connects the conductive path of the housing and the conductive path of the lightning protection component, so that the potential of the conductive path of the housing and the conductive path of the lightning protection component are the same to eliminate the potential difference therebetween. However, the inventor has found through intensive studies that, since the carbon fiber is a conductive fiber, when the conductive path of the shell and the conductive path of the lightning protection component are directly connected, lightning current of the lightning protection system is directly conducted to the shell, and thus the blade body conducts a large lightning current. Meanwhile, considering the actual structure of the blade, the shell and the lightning protection component cannot be connected along the length direction of the whole blade, and as the carbon fiber has different reactance characteristics at different sections of the blade due to different sizes of the carbon fiber in each area of the length direction of the blade, potential difference still exists in the non-connection area of the carbon fiber and the lightning protection component, so that glass fiber on the shell between the carbon fiber and the lightning protection component is broken down, and the strength of the blade is reduced.
In order to solve the technical problem, the application provides a blade, wherein a discharge gap is formed between a conductive path of a shell and a conductive path of a lightning protection component, the discharge gap can be broken down under a certain potential difference condition to form an electric connection channel to eliminate or reduce the potential difference, and the amount of current transferred to the blade body can be reduced while other parts of the blade body are protected from breakdown under the potential difference. For a better understanding of the present application, the following is a detailed description of the blade and the wind power plant according to the present application in connection with fig. 1 to 13.
Referring to fig. 1 and 2, the embodiment of the application discloses a blade 100, including a blade body 1, a lightning protection component 2 and a discharge component 3, the blade body 1 includes a housing 11 having an inner cavity, at least a partial region of the housing 11 is formed with a first conductive path, the lightning protection component 2 is disposed on the blade body 1 and is formed with a second conductive path for transmitting lightning current, the second conductive path is disposed in parallel with the first conductive path, the discharge component 3 is connected with at least one of the housing 11 and the lightning protection component 2 to form a discharge gap between the first conductive path and the second conductive path, and a breakdown voltage of the discharge gap is smaller than a breakdown voltage of the housing 11.
According to the blade 100, the discharge gap is formed between the first conductive path and the second conductive path through the discharge assembly 3, and the breakdown voltage of the discharge gap is smaller than that of the shell 11, so that when lightning current is conducted on the second conductive path, if the potential difference between the first conductive path and the second conductive path is smaller, namely smaller lightning flows down, breakdown cannot occur, and if the potential difference between the first conductive path and the second conductive path is larger, the lightning current can be guided to discharge from the position of the discharge gap, so that the shell 11 is prevented from being broken down, and the safety of the blade 100 is ensured. Meanwhile, after discharging through the discharge gap, the potential difference between the first conductive path and the second conductive path is gradually reduced, when the potential difference is smaller than the breakdown voltage of the discharge gap, the electric arcs of the first conductive path and the second conductive path are disconnected, that is, lightning current cannot be conducted to the blade body 1 by the lightning protection component, so that the amount of current conducted to the blade body 1 is reduced, and safe operation of the blade 100 is further ensured.
It will be appreciated that the first conductive path of the housing 11 may be formed from carbon fibre or other conductive material on the housing 11. Since the glass fiber is further disposed on the housing 11, in order to prevent the glass fiber of the housing of the blade 100 from being broken down and damaged, the breakdown voltage of the discharge gap is smaller than the breakdown voltage of the glass fiber between the first conductive path and the second conductive path, so that when the potential difference between the first conductive path and the second conductive path is greater than the breakdown voltage, the discharge can be broken down from the discharge gap without damaging the glass fiber of the housing 11, so as to ensure the safety of the blade 100.
Referring to fig. 1 to 3, in some alternative embodiments, the lightning protection assembly 2 is disposed to extend along a length direction X of the blade body 1, the number of the discharging assemblies 3 is one, the blade body 1 has a blade tip section and a blade root end along the length direction X, and the discharging assemblies 3 are disposed on the blade tip section or the blade root section to guide the lightning current to discharge in the blade tip section or the blade root section.
In other alternative embodiments, the number of the discharging components 3 is more than two, and the more than two discharging components 3 are arranged between the housing 11 and the lightning protection component 2 at intervals along the length direction X, so that a plurality of discharging gaps are formed between the first conductive path and the second conductive path, and thereby lightning current is better guided to be discharged from the discharging gaps.
Optionally, more than two discharge assemblies 3 may be disposed at equal intervals along the length direction X of the blade body 1, or may be disposed at variable intervals, that is, the interval between two adjacent discharge assemblies 3 may be adjusted according to the specific structure of the blade body 1, which is not specifically limited in this application.
In some alternative embodiments, the lightning protection assembly 2 comprises at least one of the conductive mesh 21 and the down conductor 22, the discharge assembly 3 comprises a first discharge module S1 and/or a second discharge module S2, the first discharge module S1 being for forming a discharge gap between the conductive mesh 21 and the housing 11, the second discharge module S2 being for forming a discharge gap between the down conductor 22 and the housing 11.
In an alternative embodiment, the lightning protection assembly 2 only comprises the conductive mesh 21, the conductive mesh 21 may be disposed on the outer surface of the housing 11 facing away from the inner cavity and forming a first sub-path of the second conductive path, and the conductive mesh 21 may extend along the length direction X to the blade root section to ensure the lightning protection effect of the blade body 1. At this time, the discharging assembly 3 includes only the first discharging module S1, and the first discharging module S1 is at least partially located between the conductive mesh 21 and the housing 11, and forms a discharging gap between the first conductive path and the first sub-path to eliminate or reduce the potential difference.
In another alternative implementation, the lightning protection assembly 2 only includes the down conductor 22, and the down conductor 22 may be disposed in the inner cavity and form a second sub-path of the second conductive path, where the discharge assembly 3 only includes the second discharge module S2, and the second discharge module S2 is at least partially located between the down conductor 22 and the housing 11, and forms a discharge gap between the first conductive path and the second sub-path to eliminate or reduce the potential difference.
In yet another alternative implementation, the lightning protection assembly 2 includes a conductive mesh 21 disposed on an outer surface of the housing 11 facing away from the inner cavity and a down conductor 22 disposed in the inner cavity, that is, a first sub-path and a second sub-path are simultaneously formed on both inner and outer sides of the housing 11, at this time, the discharge assembly 3 includes a first discharge module S1 and a second discharge module S2 simultaneously, and a discharge gap is formed between the first conductive path and the first sub-path, and between the first conductive path and the second sub-path, so as to further ensure safe operation of the blade.
Alternatively, the conductive mesh 21 may be provided in a strip shape or a belt shape, and may be provided as conductive wires woven into a fabric. In addition, the lightning protection assembly 2 may further include a receiver 23, the receiver 23 is disposed on an outer surface of the housing 11 facing away from the inner cavity, and the conductive mesh 21 is connected to the receiver 23, so as to guide lightning current captured by the receiver 23 through the conductive mesh 21 to the ground.
When the lightning protection assembly 2 includes both the conductive mesh 21 and the down conductor 22, in some alternative embodiments, the conductive mesh 21 and the down conductor 22 are disposed in abutment in the length direction X. That is, in the length direction X, the first discharge module S1 and the second discharge module S2 are separately disposed, and there is no overlap between the two, so that the positions of the first discharge module S1 and the second discharge module S2 can be adjusted respectively at this time to realize discharge adjustment.
In other alternative embodiments, the conductive mesh 21 and the down conductor 22 are disposed to extend along the length direction X of the blade body 1, and in the length direction X, the conductive mesh 21 and the down conductor 22 are disposed to at least partially overlap. The number of the first discharging modules S1 and the second discharging modules S2 is more than two, and at least part of the first discharging modules S1 and the second discharging modules S2 are arranged in a staggered manner in the length direction X in the overlapping area of the conductive mesh 21 and the down conductor 22. That is, in the overlapping region of the conductive mesh 21 and the down conductor 22, the first conductive path, the first sub-path and the second sub-path are formed at the same time, so that by adjusting the arrangement positions of the first discharge module S1 and the second discharge module S2 in the overlapping region, the lightning current can be guided to break down the discharge gap at a predetermined position and be transferred to the other conductive path, thereby adjusting the transfer manner of the lightning current along the length direction X, so as to better realize the discharge of the blade 100.
Referring to fig. 4 and fig. 5, it should be noted that the housing 11 further includes a pressure surface and a suction surface that are disposed opposite to each other, where the pressure surface and the suction surface may be respectively formed with a first conductive path, and meanwhile, the conductive mesh 21 may be respectively disposed on the pressure surface and the suction surface of the housing 11, at this time, two first sub-paths, two first conductive paths, and one second sub-path may be formed in the cross section of the blade 100, that is, five conductive paths disposed in parallel along the length direction X may be simultaneously formed, at this time, the positions of each of the first discharge module S1 and the second discharge module S2 may be further adjusted, so as to guide the lightning current to be transferred between each of the conductive paths, so as to ensure the discharge effect of the blade 100.
In some alternative embodiments, the breakdown voltage of the discharge gap formed by at least two discharge assemblies 3 is different in the length direction X. Since the structures of the respective regions of the envelope 11 in the longitudinal direction X are different, for example, the thickness of the conductive fibers, the thickness of the glass fibers and the distance between the metal mesh and the envelope 11 are different, the breakdown voltage of the discharge gap of each discharge assembly 3 can be adjusted so as to be better adapted to the structures of the respective regions of the envelope 11.
It is understood that, since the first discharging module S1 and the second discharging module S2 are disposed between the conductive mesh 21 and the housing 11 and between the housing 11 and the down conductor 22, respectively, besides making the breakdown voltages of the discharging gaps of the at least two first discharging modules S1 and/or the at least two second discharging modules S2 different in the length direction X, the breakdown voltages of the discharging gaps between the first discharging modules S1 and the second discharging modules S2 may also be different, and the specific ranges thereof may be adjusted according to the specific structure of the blade body 1, which is not particularly limited in this application.
In order to adjust the breakdown voltage of the discharge gap formed by the discharge assembly 3, the breakdown voltage of the discharge gap may be further adjusted by adjusting the size of the discharge gap and adjusting the dielectric medium filled in the discharge gap.
Referring to fig. 2 and 6, in some alternative embodiments, the discharge gap is filled with a dielectric, which is provided as air. Alternatively, the blade 100 further includes a container 4, where the container 4 is at least partially sleeved on the outer periphery of the discharge assembly 3 and covers the discharge gap, and a dielectric medium is filled in the container 4, and the dielectric medium is at least one of water, insulating oil, and zinc oxide.
When the dielectric is set as air, the air can be utilized to have the characteristic of automatic recovery, after one discharge, the discharge gap can be refilled with air, and the breakdown voltage of the discharge gap cannot be changed, so that the setting of the discharge assembly 3 is more convenient. When the dielectric medium is provided as a liquid medium or a solid powder, the accommodating parts 4 may be additionally provided, the discharge assemblies 3 may extend into the accommodating parts 4 and form discharge gaps in the accommodating parts 4, and by filling the dielectric medium in the accommodating parts 4, the adjustment of the breakdown voltage of the discharge gaps of the discharge assemblies 3 may be realized by filling different dielectric media in the discharge gaps of at least two discharge assemblies 3.
It will be appreciated that in addition to zinc oxide, other materials having non-linear voltammetric properties may be provided which are capable of functioning as a bleed and break by virtue of the non-linear properties.
In some alternative embodiments, the blade body 1 further comprises a support member 12, the support member 12 being arranged in the cavity and being connected to the outer envelope 11, the receiving member 4 and/or the discharge assembly 3 being at least partially connected to the support member 12, thereby facilitating the fixation of the discharge assembly 3 as well as the receiving member 4. For example, the support 12 may utilize a web within the blade body 1 and the discharge assembly 3 may be provided as a wire that may extend at least partially to the web and secure the position of the wire through the web, and when the blade 100 further includes the receiving member 4, the receiving member 4 may also be secured to the web and the wire portion may be provided within the receiving member 4, thereby facilitating the placement of the discharge assembly 3.
Alternatively, in some other embodiments, the receiving member 4 may be fixed to the surface of the outer envelope 11 facing the inner chamber, i.e. the receiving member 4 and the discharge assembly 3 may be supported.
It will be appreciated that when the lightning protection assembly 2 includes the conductive mesh 21 and the down conductor 22 electrically connected to the conductive mesh 21, since the down conductor 22 is disposed in the inner cavity, the down conductor 22 can be also fixed on the web 12, thereby facilitating the extension of the first discharging module S1. Since the conductive mesh 21 is disposed on the outer surface of the housing 11 facing away from the inner cavity, the second discharging module S2 may be disposed between the conductive mesh 21 and the housing 11, or may be a connection wire electrically connected to the conductive mesh 21, so as to facilitate the extension of the second discharging module S2 by extending the connection wire to the inner cavity and fixing the connection wire on the web 12.
For convenience of description, the first discharging module S1 will be taken as an example, and how a discharging gap is formed between the blade body 1 and the lightning protection assembly 2 by the discharging assembly 3 will be described.
Referring to fig. 7, in some alternative embodiments, the discharging assembly 3 includes a first discharging portion 31, one end of the first discharging portion 31 is connected to one of the blade body 1 and the lightning protection assembly 2, and the other end extends toward the other of the blade body 1 and the lightning protection assembly 2 and forms a discharging gap with the other. That is, the discharge assembly 3 may include only the first discharge portion 31, and the discharge gap may be formed by the end of the first discharge portion 31 being spaced apart from one of the blade body 1 and the lightning protection assembly 2.
Referring to fig. 8, in some alternative embodiments, the discharging assembly 3 includes a second discharging portion 32 and a third discharging portion 33, one ends of the second discharging portion 32 and the third discharging portion 33 are respectively connected with the blade body 1 and the lightning protection assembly 2, and the other ends of the second discharging portion 32 and the third discharging portion 33 are disposed opposite to each other and form a discharging gap. That is, the discharge assembly 3 may include the second discharge portion 32 and the third discharge portion 33, and the discharge gap is formed by the end portions of the second discharge portion 32 and the third discharge portion 33 being spaced apart.
Referring to fig. 9, in some alternative embodiments, the discharge assembly 3 further includes a fourth discharge portion 34, where the fourth discharge portion 34 is connected to the blade body 1 and extends at least partially into the discharge gap to separate the discharge gap into a first sub-gap and a second sub-gap. Specifically, when the discharge module 3 includes the first discharge portion 31, the fourth discharge portion 34 may be disposed in a discharge gap formed by the first discharge portion 31 and one of the blade body 1 and the lightning protection module 2, and when the discharge module 3 includes the second discharge portion 32 and the third discharge portion 33, the fourth discharge portion 34 may be disposed in a discharge gap formed by the second discharge portion 32 and the third discharge portion 33. By providing the fourth discharge portion 34 in the discharge gap, the size of the discharge gap can be further adjusted to further adjust the breakdown voltage of the discharge assembly 3.
Referring to fig. 8, 10 to 12, in some alternative embodiments, the end portion of the discharge assembly 3 for forming the discharge gap is configured as at least one of a columnar structure, a needle-like structure, a spherical structure, and a plate-like structure. That is, the discharge assembly 3 is capable of ensuring that a discharge gap is formed between the first conductive path and the second conductive path, and the end structure of the conductive portion thereof is adjustable according to the specific structure of the blade 100.
Referring to fig. 13, the embodiment of the present application further provides a wind generating set, including the blade 100 in the above embodiment. The wind power generation set further includes a nacelle 200 and a tower 300, the nacelle 200 being disposed on top of the tower 300, and the lightning protection assembly 2 of the blade 100 being electrically connected to ground through the nacelle 200 and the tower 300.
The wind turbine generator set according to the embodiments of the present application includes the blade 100 provided in each of the embodiments, so the wind turbine generator set provided in the embodiments of the present application has the technical effects of the technical solution of the blade 100 in any of the embodiments, and the explanation of the same or corresponding structure and terms as those of the embodiments is not repeated herein.
While the present application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (13)
1. A blade, comprising:
a blade body (1) comprising a housing (11) having an inner cavity, at least a partial region of the housing (11) being formed with a first conductive path;
the lightning protection assembly (2) is arranged on the blade body (1) and is provided with a second conductive path for transmitting lightning current, and the second conductive path is arranged in parallel with the first conductive path;
and a discharge assembly (3) connected with at least one of the housing (11) and the lightning protection assembly (2) to form a discharge gap between the first and second conductive paths, the discharge gap having a breakdown voltage less than that of the housing (11).
2. The blade according to claim 1, characterized in that the lightning protection assembly (2) is arranged extending in the length direction of the blade body (1);
the number of the discharge assemblies (3) is one, the blade body is provided with a blade tip section and a blade root section along the length direction, and the discharge assemblies (3) are arranged on the blade tip section or the She Genduan;
or, the number of the discharging components (3) is more than two, and the discharging components (3) are arranged between the shell (11) and the lightning protection component (2) at intervals along the length direction.
3. The blade according to claim 2, wherein the lightning protection assembly (2) comprises at least one of a conductive mesh (21) and a down conductor (22);
the discharging assembly (3) comprises a first discharging module (S1) and/or a second discharging module (S2), wherein the first discharging module (S1) is used for forming a discharging gap between the conductive net (21) and the shell (11), and the second discharging module (S2) is used for forming a discharging gap between the down conductor (22) and the shell (11).
4. A blade according to claim 3, characterized in that the conductive mesh (21) and the down conductor (22) are arranged in abutment in the length direction.
5. A blade according to claim 3, wherein in the length direction the conductive mesh (21) is arranged at least partially overlapping the down conductor (22), and in the overlapping area of the conductive mesh (21) and the down conductor (22) at least part of the first discharge module (S1) and the second discharge module (S2) are arranged offset in the length direction.
6. Blade according to claim 2, characterized in that the breakdown voltage of the discharge gap formed by at least two of the discharge assemblies (3) differs in the length direction.
7. The blade according to claim 1, characterized in that the discharge assembly (3) comprises a first discharge portion (31), one end of the first discharge portion (31) being connected with one of the blade body (1) and the lightning protection assembly (2), the other end being arranged extending towards the other of the blade body (1) and the lightning protection assembly (2) and forming the discharge gap with the other.
8. The blade according to claim 1, characterized in that the discharge assembly (3) comprises a second discharge portion (32) and a third discharge portion (33), one end of the second discharge portion (32) and one end of the third discharge portion (33) are connected with the blade body (1) and the lightning protection assembly (2), respectively, and the other end of the second discharge portion (32) and the other end of the third discharge portion (33) are arranged opposite to each other and form the discharge gap.
9. The blade according to claim 7 or 8, characterized in that the discharge assembly (3) further comprises a fourth discharge portion (34), which fourth discharge portion (34) is connected to the blade body (1) and extends at least partly into the discharge gap to separate the discharge gap into a first and a second sub-gap.
10. The blade according to claim 1, wherein the end portion of the discharge assembly (3) to form the discharge gap is provided as at least one of a columnar structure, a needle-like structure, a spherical structure, and a plate-like structure.
11. The blade according to claim 1, wherein the discharge gap is filled with a dielectric, which is provided as air;
or, the blade further comprises a containing piece (4), the containing piece (4) is at least partially sleeved on the periphery of the discharging assembly (3) and coats the discharging gap, the containing piece is filled with dielectric medium, and the dielectric medium is at least one of water, insulating oil and zinc oxide.
12. Blade according to claim 11, wherein the blade body (1) further comprises a support (12), the support (12) being arranged in the inner cavity and being connected to the outer shell (11), the receiving member (4) and/or the discharge assembly (3) being at least partially connected to the support (12).
13. A wind power plant comprising a blade according to any of claims 1 to 12.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211520980.9A CN116292070A (en) | 2022-11-30 | 2022-11-30 | Blade and wind generating set |
| PCT/CN2023/115941 WO2024113993A1 (en) | 2022-11-30 | 2023-08-30 | Blade, wind turbine generator system, and discharge apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211520980.9A CN116292070A (en) | 2022-11-30 | 2022-11-30 | Blade and wind generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116292070A true CN116292070A (en) | 2023-06-23 |
Family
ID=86785727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211520980.9A Pending CN116292070A (en) | 2022-11-30 | 2022-11-30 | Blade and wind generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116292070A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024113993A1 (en) * | 2022-11-30 | 2024-06-06 | 江苏金风科技有限公司 | Blade, wind turbine generator system, and discharge apparatus |
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