CN210317620U - Wind-powered electricity generation blade lightning protection structure and wind-powered electricity generation blade - Google Patents
Wind-powered electricity generation blade lightning protection structure and wind-powered electricity generation blade Download PDFInfo
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- CN210317620U CN210317620U CN201921069622.4U CN201921069622U CN210317620U CN 210317620 U CN210317620 U CN 210317620U CN 201921069622 U CN201921069622 U CN 201921069622U CN 210317620 U CN210317620 U CN 210317620U
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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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Abstract
The utility model provides a wind-powered electricity generation blade lightning protection structure and wind-powered electricity generation blade belongs to wind turbine generator system blade thunderbolt protection technical field, and wherein wind-powered electricity generation blade lightning protection structure includes: the metal blade tip is arranged at the tip of the blade and is electrically connected with the grounding lead in the blade; and the metal probe is arranged on the blade at a certain interval with the metal blade tip and is electrically connected with the metal blade tip through a connecting lead. The utility model discloses a wind-powered electricity generation blade lightning protection structure forms the discharge path through metal probe, connecting wire, metal apex, ground lead, under the effect of the downlink guide's strong electric field of thunderbolt, is close to the metal probe of thunder and lightning more, and the initial guide that goes upward that the lead can be more than ground lead forms the discharge path with downlink guide. Therefore, induced charges around the grounding lead are effectively reduced to form current column discharge, an ascending pilot breakdown blade is further formed, and the safety of the blade in a lightning stroke environment can be effectively protected.
Description
Technical Field
The utility model relates to a wind turbine generator system blade thunderbolt protection technical field, concretely relates to wind-powered electricity generation blade lightning protection structure and wind-powered electricity generation blade.
Background
With the rapid development of economy, the demand of people on electric energy is continuously increased, and the capacity of a wind turbine generator and the scale of wind power generation are also continuously enlarged. Because the body structure of the wind turbine generator is high and outstanding, the wind turbine generator is often located in open fields or mountain areas, lightning strike is one of the main factors influencing the safe operation of the wind turbine generator, and the blade is the most easily struck component in the whole generator set by lightning. Therefore, the lightning stroke protection of the wind turbine blade becomes a key problem which restricts the reliable operation of the wind turbine.
Chinese patent document CN102869882A discloses a wind turbine blade with a lightning protection system, which includes a blade tip, a lightning receptor arranged near the blade tip, and a grounding lead penetrating through the inside of the blade; when a lightning strike occurs, the lightning strike current is conducted through the lightning receptor to the ground lead and ultimately to the earth to complete the discharge path.
When the blade structure is struck by lightning, the grounding lead generates induced charges around the lead with a certain probability under the induction of a lightning down-going pilot strong electric field, and the charges are accumulated to form streamer discharge. The electric charges gathered on the grounding lead further form an upward leader to form a discharge path with the lightning stroke downward leader, and the grounding lead is positioned in the blade, so that the formed discharge path formed by streamer discharge and the lightning stroke downward leader is easy to puncture the blade, a large amount of high-temperature lightning stroke electric arcs are fused into the puncture position, and the blade is easy to be damaged by lightning stroke.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model discloses the technical problem who solves lies in overcoming the wind-powered electricity generation blade among the prior art, when receiving the thunderbolt, the ground lead is under the response of the downlink guide electric field of thunderbolt, easily gather a large amount of charges on every side, a large amount of charges of gathering have certain probability to form the streamer and discharge, further form and go upward the guide, then puncture the blade and the downlink guide of thunderbolt forms the discharge path, lead to the high defect of blade thunderbolt damage rate, thereby provide one kind and can effectively avoid the initial guide that goes upward on the ground lead, reduce the wind-powered electricity generation blade lightning protection structure of the thunderbolt damage rate of blade.
The utility model also provides a wind-powered electricity generation blade with above-mentioned lightning protection structure.
In order to solve the technical problem, the utility model provides a wind-powered electricity generation blade lightning protection structure, include:
the metal blade tip is arranged at the tip part of the blade and is electrically connected with the grounding lead in the blade;
and the metal probe is arranged on the blade at a certain interval with the metal blade tip and is electrically connected with the metal blade tip through a connecting wire.
Preferably, the metal probes are provided in plurality and are sequentially arranged along the connection lead.
Preferably, the metal probe is positioned on the blade at a location 1/10 the length of the blade near the tip of the blade.
Preferably, a plurality of the metal probes are uniformly arranged on the connection lead.
Preferably, the metal probe and the connecting wire are of an integral structure.
Preferably, the connecting lead is attached to the outer surface of the blade.
Preferably, the metal probe is vertically arranged on the blade, and one end of the metal probe close to the blade is electrically connected with the connecting lead.
The utility model provides a wind-powered electricity generation blade, including any one of the above-mentioned scheme lightning protection structure.
As a preferred scheme, the wind power blade further comprises:
and the lightning receptor is arranged on the outer surface of the blade and is electrically connected with the grounding lead.
Preferably, the metal probe of the lightning protection structure is arranged at the position of the trailing edge of the blade.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a wind-powered electricity generation blade lightning protection structure, including the metal apex that sets up at the blade tip and the metal probe who sets up on the blade, wherein the metal apex is connected with the ground lead electricity in the blade, and the metal probe keeps the spacing distance setting with the metal apex to be connected with the metal apex electricity through connecting wire; therefore, the metal probe, the connecting lead, the metal blade tip and the grounding lead form a discharge path, under the action of the lightning stroke downlink pilot strong electric field, the metal probe is closer to the lightning metal probe, and the grounding lead can start an uplink pilot with higher probability and form a discharge path with the downlink pilot. Therefore, induced charges around the grounding lead are effectively reduced to form current column discharge, an ascending pilot breakdown blade is further formed, and the safety of the blade in a lightning stroke environment can be effectively protected.
2. The utility model provides a wind-powered electricity generation blade lightning protection structure, metal probe have a plurality ofly to set gradually along connecting wire, a plurality of metal probe combined action are favorable to improving the thunderbolt protective capacities of blade.
3. The utility model provides a wind-powered electricity generation blade lightning protection structure, metal probe set up the position that is located 1/10 blade lengths near the apex on the blade, can reduce the time of thunderbolt electric current conduction, make its conduct metal leaf point department rapidly.
4. The utility model provides a wind-powered electricity generation blade lightning protection structure, a plurality of metal probe are in evenly arranging on the connecting wire, being favorable to thunderbolt electric current order reposition of redundant personnel conduction, effectively reducing the electric charge gathering phenomenon.
5. The utility model provides a wind-powered electricity generation blade lightning protection structure, metal probe and connecting wire structure as an organic whole are favorable to thunderbolt electric current to conduct rapidly through connecting conductor.
6. The utility model provides a wind-powered electricity generation blade lightning protection structure, connecting wire paste tightly the surface of blade can make metal probe form exposed electrode at the blade surface.
7. The utility model provides a wind-powered electricity generation blade lightning protection structure, metal probe set up perpendicularly on the blade, metal probe's the one end that is close to the blade with the connecting wire electricity is connected, only like this metal probe's top accepts the thunderbolt effect, avoids the damage of thunderbolt electric current to metal probe self to avoid influencing the conduction of thunderbolt electric current, finally lead to the blade to be punctured.
8. The utility model provides a wind-powered electricity generation blade owing to have any one of above-mentioned scheme lightning protection structure, consequently have any one of above-mentioned scheme advantage.
9. The utility model provides a wind-powered electricity generation blade still includes: the lightning arrester is arranged on the outer surface of the blade and is electrically connected with the grounding lead, so that the grounding lead connects the metal blade tip and the lightning arrester in series to form a complete discharge path, when lightning occurs, a lightning attachment point can hit the lightning arrester, and a large amount of lightning current can be transmitted to the grounding lead through the lightning arrester to be led into the ground.
10. The utility model provides a wind-powered electricity generation blade, the metal probe setting of lightning protection structure can not destroy the aerodynamic performance of blade at the trailing edge position of blade, through gathering the thunder and lightning blade trailing edge department to reduce the breakdown damage of thunder and lightning other positions on to the blade.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a three-dimensional structure of a wind power blade of the present invention;
FIG. 2 is an enlarged schematic view of the tip portion of the blade of FIG. 1;
fig. 3 is a front view of the connecting lead and the metal probe.
Description of reference numerals:
1. a blade; 2. connecting a lead; 3. a metal probe; 4. a metal blade tip; 5. a lightning receptor; 6. and a ground lead.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
As shown in fig. 1 and fig. 2, the present embodiment provides a wind turbine blade, which has a lightning protection structure, where the lightning protection structure includes a metal blade tip 4 disposed at a tip portion of the blade, and a connection wire 2 and a metal probe 3 connected to the metal blade tip. The metal blade tip 4 is arranged at the tip of the blade 1 and is electrically connected with a grounding lead 6 inside the blade 1, so that lightning current can be conducted to the grounding lead 6 through the metal blade tip 4 and then transmitted to the ground.
The connecting lead 2 is close to the tip part and clings to the skin on the outer surface of the blade 1 and is electrically connected with the metal blade tip 4, and the connecting lead 2 extends from the position of the metal blade tip 4 to the direction of the root part of the blade.
The metal probes 3 are arranged on the connecting wires 2 and electrically connected with the connecting wires 2, and the metal probes 3 are uniformly distributed on the connecting wires 2 and are perpendicular to the outer surfaces of the blades 1. The metal probe is vertically arranged, and the electrode exposed at the free end of the metal probe can enable the metal probe 3 to be contacted with thunder and lightning earlier, so that the thunder and lightning are conducted towards the metal blade tip 4 through the metal probe 3, a large amount of charges are gathered near the metal probe 3 under the induction of a lightning stroke downlink pilot electric field, a circuit penetrates through the blade when the circuit is subjected to uplink pilot, and the lightning stroke damage rate of the blade is reduced.
The connecting lead 2 and the metal probe 3 are of an integral structure, and the positions of the connecting lead 2 and the metal probe 3 are located at the 1/10 blade length position close to the blade tip and at the rear edge position of the blade, so that the aerodynamic performance of the blade is not affected. By collecting lightning to the trailing edge of the blade, the breakdown damage of the lightning to other parts of the blade can be reduced.
In the embodiment, the metal probe 3, the connecting lead 2, the metal blade tip 4 and the grounding lead 6 are sequentially communicated to form a discharge loop, when thunder is in contact with the metal probe 3, the metal probe 3 rapidly conducts the thunder to the metal blade tip 4 through the connecting lead 2, induced charges exist around the metal probe 3 under the induction of a lightning stroke descending pilot strong electric field, the charges are accumulated to form current column discharge, an ascending pilot is further formed, and therefore the metal probe 3 is damaged by at most thunder; this allows the charge accumulation to be transferred from around the ground lead 6 to around the metal probe 3, avoiding the up-leader loop from charge accumulation from breaking down the blade.
As shown in fig. 3, the metal probes 3 are uniformly arranged on the connection lead 2, and the size of the metal probes may be set as follows: the diameter is 4mm, the height is 50mm, and the distance is 500 mm; the dimensions of the connecting wire 2 can be set as: diameter 4mm, length 1/10 of blade radius. In addition, the metal probe and connecting wire 2 may have other conventional forms and sizes, and other sizes are within the scope of the present patent.
As shown in fig. 1 and fig. 2, the lightning protection structure of the wind turbine blade of this embodiment may further include: the lightning receptor 5 is arranged on the outer surface of the blade 1 close to the metal blade tip 4, and forms another discharge path with the grounding lead 6 in the wind power blade; when thunder and lightning occur, after the thunder and lightning hit the lightning receptor, a large amount of lightning current can be transferred to the grounding lead through the lightning receptor and then is led into the ground. The lightning protection structure of wind-powered electricity generation blade that this embodiment provided because with the conflict of other facilities of current installation blade, consequently can carry out thunderbolt to current installation wind-powered electricity generation blade and reform transform, and installation construction is simple and convenient.
The working principle is as follows:
the metal probe 3, the connecting wire 2, the metal blade tip 4 and the grounding lead 6 form a discharge path, and the process is as follows: when thunder occurs, the lightning strike attachment point firstly hits the metal probe 3, so that lightning strike current is conducted to the metal blade tip 4 through the metal probe 3 and the connecting lead 2, and then the lightning strike current is transmitted to the ground through the grounding lead 6 by the metal blade tip 4, and a discharge path is formed. The method is an ideal loop for lightning current discharge, and the practical situation is that under the induction of a lightning down leading strong electric field, induced charges exist around the metal probe 3, the charges are accumulated to form a current column discharge and further form an up leading, so that at most the metal probe is damaged by lightning; this shifts the charge accumulation from around the ground lead 6 to around the metal probe 3, reducing the probability of the blade being broken down by the upward leader loop resulting from the charge accumulation.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. Wind-powered electricity generation blade lightning protection structure, its characterized in that includes:
the metal blade tip (4) is arranged at the tip of the blade (1) and is electrically connected with a grounding lead (6) in the blade (1);
and the metal probe (3) is arranged on the blade (1) at a certain interval with the metal blade tip (4) and is electrically connected with the metal blade tip (4) through a connecting wire (2).
2. The wind turbine blade lightning protection structure according to claim 1, wherein the metal probes (3) are provided in plurality and are arranged in sequence along the connecting wires (2).
3. The lightning protection structure for the wind turbine blade according to claim 2, characterized in that the metal probe (3) is arranged on the blade (1) at a position close to 1/10 blade length of the blade tip.
4. Wind turbine blade lightning protection structure according to claim 2, characterized in that a plurality of said metal probes (3) are evenly arranged on said connection wires (2).
5. The wind turbine blade lightning protection structure according to claim 4, characterized in that the metal probe (3) and the connecting wire (2) are of an integral structure.
6. The lightning protection structure for the wind turbine blade according to any one of claims 1 to 5, wherein the connecting wire (2) is attached to the outer surface of the blade (1).
7. The wind-powered electricity generation blade lightning protection structure of claim 6, characterized in that, the metal probe (3) is vertically arranged on the blade (1), and one end of the metal probe (3) close to the blade (1) is electrically connected with the connecting wire (2).
8. The wind power blade is characterized by comprising the lightning protection structure as defined in any one of claims 1-7.
9. The wind blade of claim 8, further comprising:
and the lightning receptor (5) is arranged on the outer surface of the blade (1) and is electrically connected with the grounding lead (6).
10. Wind turbine blade according to claim 8, characterised in that the metallic probe (3) of the lightning protection structure is arranged at the trailing edge of the blade (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921069622.4U CN210317620U (en) | 2019-07-09 | 2019-07-09 | Wind-powered electricity generation blade lightning protection structure and wind-powered electricity generation blade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921069622.4U CN210317620U (en) | 2019-07-09 | 2019-07-09 | Wind-powered electricity generation blade lightning protection structure and wind-powered electricity generation blade |
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| CN210317620U true CN210317620U (en) | 2020-04-14 |
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| CN201921069622.4U Active CN210317620U (en) | 2019-07-09 | 2019-07-09 | Wind-powered electricity generation blade lightning protection structure and wind-powered electricity generation blade |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332081A (en) * | 2019-07-09 | 2019-10-15 | 中国华电科工集团有限公司 | A kind of wind electricity blade lightning protection structure and wind electricity blade |
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2019
- 2019-07-09 CN CN201921069622.4U patent/CN210317620U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332081A (en) * | 2019-07-09 | 2019-10-15 | 中国华电科工集团有限公司 | A kind of wind electricity blade lightning protection structure and wind electricity blade |
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