CN102946037B - Method for connecting lightning channel from hub to cabin - Google Patents
Method for connecting lightning channel from hub to cabin Download PDFInfo
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- CN102946037B CN102946037B CN201210414541.XA CN201210414541A CN102946037B CN 102946037 B CN102946037 B CN 102946037B CN 201210414541 A CN201210414541 A CN 201210414541A CN 102946037 B CN102946037 B CN 102946037B
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- hubcap
- lightning
- engine room
- conducting ring
- room cover
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- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 208000025274 Lightning injury Diseases 0.000 abstract description 2
- 238000010923 batch production Methods 0.000 abstract 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 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Wind Motors (AREA)
Abstract
The invention provides a method for connecting a lightning channel from a hub to a cabin. The lightning channel is built between a hub cap and a cabin cover, one end of the lightning channel is connected with a lightning receiving conductor of the hub cap, the other end of the lightning channel is connected with a lightning receiving conductor of the cabin cover, and lightning current bypasses a main shaft and is transmitted to the cabin cover from the hub cap through the channel so as to prevent lightning for a wind turbine generator; the lightning channel comprises a conductive ring and a conductive brush, and the conductive ring is concentric with the hub cap, the cabin cover and the main shaft; and the conductive ring is in sliding contact with the conductive brush to form an electrical connection channel between the hub cap and the cabin cover in a rotating state. In the lightning stroke process, the lightning current is conducted to the lightning receiving conductor of the cabin cover through a system of the conductive brush and the conductive ring and is not conducted through the hub and the main shaft to the cabin, so that relevant electrical and mechanical systems are well protected. The device is low in cost, and the method is simple, easy to implement and suitable for batch production.
Description
Technical field
The present invention relates to technical field of wind power generation, be specifically related to the lightning channel method of attachment of a kind of wheel hub to cabin, by building a lightning protection passage that gets around main shaft, while avoiding wind-powered electricity generation unit to be struck by lightning to machinery relevant in main shaft and wheel hub and cabin and the infringement of electric component.
Background technology
Along with the development of wind generating technology, wind turbine generator has obtained large-scale application, and the safe operation problem of wind-powered electricity generation unit comes into one's own day by day, and no matter on land or sea, thunderbolt is all one of key factor affecting safe operation of wind turbine.In the time that blower fan is struck by lightning, huge lightning current can be injected into wheel hub by blade or radome fairing, then enters cabin by wheel hub, arrives earthing device through tower cylinder or ground wire, finally spills into the earth.
In fan operation process, wheel hub rotates relative to cabin, is completed the mechanical connection in wheel hub and cabin by main shaft; Because main shaft is made up of metal, objectively form the electric path of a wheel hub to cabin; Based on this path, the part of traditional wind-powered electricity generation lightning-protection system using main shaft as lightning channel.But, long-term operation practice shows, main shaft is also unreliable and very dangerous as a part for lightning channel, in the time that huge lightning current passes through main shaft, due to the existence of contact resistance and line inductance, in this transient process, the current potential in the relative cabin of main shaft is elevated, this potential difference will likely puncture the bearing of main shaft, causes main shaft bearing to be corroded by lightning current, directly breaks down or greatly shortens the service life of main shaft; Meanwhile, this mode requires the electric component in wheel hub and on gear box to reach higher withstand voltage level, and has improved these electric component lightning protection grades, otherwise thunderbolt also will cause the damage of these electric components.
When main shaft is during as lightning current passage a part of, in order to ensure reliability and the fail safe of main shaft, or select the bearing that can bear corresponding lightning current; Main shaft bearing is carried out to insulation processing, the potential difference producing can bear thunderbolt time.But these methods all can increase cost by a relatively large margin, real inadvisable, be necessary traditional wind-powered electricity generation unit to improve to the lightning channel in cabin by the wheel hub of main shaft, build a lightning channel that gets around wheel hub, main shaft.
Summary of the invention
In order to overcome the deficiencies in the prior art; build a lightning channel that gets around main shaft; the present invention proposes the lightning channel method of attachment of a kind of wheel hub to cabin; the erosion of lightning current to main shaft while having avoided wind-powered electricity generation unit to be struck by lightning, protects the inner relevant electric and mechanical system of wind turbine generator better.
In order to realize foregoing invention object, the technical solution used in the present invention is: a kind of wheel hub is to the lightning channel method of attachment in cabin, it is characterized in that: between hubcap and engine room cover, build a lightning channel, this lightning channel one end is connected with the thunder conductor that is subject to of hubcap, the other end is connected with the thunder conductor that is subject to of engine room cover, lightning current gets around main shaft and is delivered to engine room cover by this passage from hubcap, realizes the lightning protection of wind-powered electricity generation unit; This lightning channel comprises conducting ring and conduction brush, and described conducting ring is concentric with hubcap, engine room cover and main shaft; Sliding contact between conducting ring and conduction brush, has formed the electrical connection passage under rotation status between hubcap and engine room cover; Described conduction brush arranges more than 1 or 1 along conducting ring circumference; The brush end of conduction brush or with the outer side contacts of the conducting ring surfaces of revolution, or with the interior side contacts of the conducting ring surfaces of revolution, or contact with the axial of the conducting ring surfaces of revolution; The handle end of conduction brush is fixed on engine room cover/hubcap, keeps being subject to engine room cover/hubcap the electrical connection that thunder conductor is good.
Further, described conducting ring or be positioned at outside hubcap/engine room cover; Or be positioned at hubcap/engine room cover; Or between hubcap and engine room cover.
Further, described conducting ring is the electric slip ring that is specifically designed to conduction.
Further, described conducting ring is sleeved on main shaft, and carries out good insulation processing between conducting ring and main shaft.
Further, described conducting ring is fixedly mounted on surface or inner surface outside hubcap/engine room cover by screw or rivet.
Further, described conducting ring is to be made up of the annular conduction flat surface directly processing in described hubcap or engine room cover.
Further, described conduction brush is brush shape electric contacting part, draws together carbon brush, conduction hairbrush, conductive fiber brush, elastic sheet metal.
Operation principle of the present invention is: conduction brush and conducting ring form lightning channel and realized the electrical connection rotatablely moving under state between hubcap and engine room cover, and in the time that wind-force is not enough, the relative engine room cover of hubcap is moved without spin; In the time that wind-force reaches a certain size, wheel hub rotates relative to cabin; The lightning channel that brush and conducting ring form can provide good electrical connection to cabin for wheel hub in rotation and not rotation situation.The lightning channel that the present invention builds, one end is connected with the thunder conductor that is subject to of hubcap, the other end is connected with the thunder conductor that is subject to of engine room cover, in the time that the lightning current from blade or hubcap arrives, the lightning channel that lightning current consists of brush and conducting ring conducts to the thunder conductor that is subject to of engine room cover, and not by main shaft and wheel hub.Because lightning current is not by main shaft and wheel hub, therefore main shaft and wheel hub avoid the destruction of thunderbolt.Meanwhile, in lightning stroke process, in hubcap, each electric component also significantly declines with respect to the potential difference of the equipotential body in cabin, and the electric component that whole system is relevant has all obtained effective protection.
Beneficial effect of the present invention is: 1, form lightning protection device based on brush conducting ring, for the electrical connection of rotation status parts, lightning current is directed in the process of the earth, and or not by wheel hub, main shaft, gear box, related electric and mechanical system can well not protected; 2, this installation cost is cheap, and implementation method flexible and convenient is applied widely, is applicable to using in batches.
Brief description of the drawings
Fig. 1 embodiment mono-structural representation;
Fig. 2 embodiment mono-cross sectional representation;
Fig. 3 embodiment bis-structural representations
Wherein: 1, hubcap; 2, engine room cover; 3, conducting ring; 4, conduction brush; 5, main shaft; 6, brush carrier; 7, screw
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
According to the structure of wind-powered electricity generation unit, while thunderbolt in wind turbine generator, in general, lightning current can be injected into wheel hub by blade or radome fairing, then enters cabin through main shaft by wheel hub, arrives ground finally by tower cylinder.
The invention provides the lightning channel method of attachment of a kind of wheel hub to cabin, it is characterized in that: between hubcap and engine room cover, build a lightning channel, this lightning channel one end is connected with the thunder conductor that is subject to of hubcap, the other end is connected with the thunder conductor that is subject to of engine room cover, lightning current gets around main shaft and is delivered to engine room cover by this passage from hubcap, realizes the lightning protection of wind-powered electricity generation unit; This lightning channel comprises conducting ring and conduction brush, and described conducting ring is concentric with hubcap, engine room cover and main shaft; Sliding contact between conducting ring and conduction brush, has formed the electrical connection passage under rotation status between hubcap and engine room cover.Be subject to thunder conductor to refer to conducting metal or the cable for conducting thunder and lightning, or itself conducting position in engine room cover or hubcap, can be used for thunder and lightning conduction.
According to conducting ring and engine room cover or the residing relative position of hubcap, roughly can be divided into the layout of following several forms: it is concentric and near main shaft with main shaft that conducting ring is positioned at hubcap or engine room cover; It is concentric and keep certain distance with main shaft 1 that conducting ring is positioned at hubcap or engine room cover, near the edge of hubcap or engine room cover; Conducting ring is positioned at hubcap and the crossing position of engine room cover; Conducting ring is positioned at outside hubcap or engine room cover.
According to the access path of lightning channel, can adopt conduction brush to be connected with the thunder conductor that is subject to of hubcap, conducting ring is connected with the thunder conductor that is subject to of engine room cover; Or conduction brush is connected with the thunder conductor that is subject to of engine room cover, and conducting ring is connected with the thunder conductor that is subject to of hubcap.
According to the electric connecting mode of conduction brush and conducting ring, roughly also can be divided into following three kinds: conduction brush is positioned at the outer ring direction of the conducting ring surfaces of revolution; Conducting ring is positioned at the inner ring direction of the surfaces of revolution; Conduction brush is positioned at the axis direction of the conducting ring surfaces of revolution.Described conduction brush is to provide the brush shape electric contacting part of electrical contact, can be carbon brush, conduction hairbrush, and conductive fiber brush, can also be elastic sheet metal etc.
Described conducting ring can be the slip ring that is exclusively used in conduction; Also can be to utilize engine room cover, hubcap or the smooth part in mechanical structure above main shaft; It can also be the smooth part processing specially in the time of hubcap, engine room cover or spindle processing.
These connected modes, can be according to actual overview, and freely random Selection and Constitute mode, only has by the mode of conducting ring and brush, realizes hubcap under rotation status and the good electrical connection of engine room cover, all can realize goal of the invention.Within all falling into protection scope of the present invention based on the derivative technical scheme of inventive concept.
Below in conjunction with accompanying drawing, the present invention is described in detail.
Embodiment mono-
To adopt special conducting ring to be arranged on form between hubcap and engine room cover as example, when thunderbolt occurs, what the arrester of vane tip passed to hubcap by lightning current by the leakage path between blade and hubcap is subject to thunder conductor.Current hubcap/engine room cover is made mainly with fiberglass or aluminum alloy materials, and the hubcap of metal material itself is exactly to be subject to thunder conductor, and the thunder conductor that is subject to of hubcap/engine room cover that nonmetallic composite is made generally adopts the many net metal lines that lay.
As depicted in figs. 1 and 2, special conducting slip ring 3 and main shaft 5 are arranged between hubcap 1 and engine room cover 2 with one heart, are fixedly mounted on hubcap 1 inner surface by screw 7,3 conduction brush 4 are equidistantly arranged on engine room cover 2 by brush carrier 6 circumference.When installation, to ensure the conductive metal wire foundation electrical connection reliably of laying in conducting ring and conduction brush and hubcap and engine room cover.
In fan operation process, wheel hub rotates relative to cabin, and the conducting slip ring that is fixedly mounted on hubcap inner surface rotates with hubcap; The conduction brush being fixedly mounted in engine room cover contacts with conducting ring sliding type, and what electric current on conducting ring was introduced to engine room cover is subject to thunder conductor, realizes the lightning protection object to wind-powered electricity generation unit.
Embodiment bis-
As example, the present invention will be described directly to process conducting ring on hubcap for embodiment bis-.When hubcap or engine room cover are metals while making, can be by process smooth circumferentia as conducting ring when the processing hubcap simultaneously.As shown in Figure 3, the flat surface of processing on hubcap 1 has formed conducting slip ring 3, and the conduction brush 4 shown in figure adopts elastic sheet metal, and elastic sheet metal one end is welded or is threaded in engine room cover 2, and one end contacts with the surface sliding of conducting slip ring 3.Elastic sheet metal multi-disc arranges, and the lightning channel of formation is directed to engine room cover by the lightning current on hubcap through conducting ring, elastic sheet metal, and when thunderbolt occurs, lightning current is without main shaft 5.The benefit of this mode is that electrical connection is reliable, does not need to use special electric brush slip ring.
Above-mentioned execution mode is only the preferred embodiment of the present invention; protection scope of the present invention is not imposed any restrictions; those of ordinary skill in the art are not departing from distortion and the retouching under essence of the present invention and technology enlightenment, done; all should be considered as within protection scope of the present invention, protection scope of the present invention is depending on its claims.
Claims (7)
1. the lightning channel method of attachment that wheel hub arrives cabin, it is characterized in that: between hubcap and engine room cover, build a lightning channel, this lightning channel one end is connected with the thunder conductor that is subject to of hubcap, the other end is connected with the thunder conductor that is subject to of engine room cover, lightning current gets around main shaft and is delivered to engine room cover by this passage from hubcap, realizes the lightning protection of wind-powered electricity generation unit; This lightning channel comprises conducting ring and conduction brush, and described conducting ring is concentric with hubcap, engine room cover and main shaft; Sliding contact between conducting ring and conduction brush, has formed the electrical connection passage under rotation status between hubcap and engine room cover; Described conduction brush arranges more than 1 or 1 along conducting ring circumference; The brush end of conduction brush or with the outer side contacts of the conducting ring surfaces of revolution, or with the interior side contacts of the conducting ring surfaces of revolution, or contact with the axial of the conducting ring surfaces of revolution; The handle end of conduction brush is fixed on engine room cover/hubcap, keeps being subject to engine room cover/hubcap the electrical connection that thunder conductor is good.
2. a kind of wheel hub, to the lightning channel method of attachment in cabin, is characterized in that according to claim 1: described conducting ring or be positioned at outside hubcap/engine room cover; Or be positioned at hubcap/engine room cover; Or between hubcap and engine room cover.
3. the lightning channel method of attachment to cabin according to a kind of wheel hub described in claim 1 or 2, is characterized in that: described conducting ring is the electric slip ring that is specifically designed to conduction.
4. a kind of wheel hub, to the lightning channel method of attachment in cabin, is characterized in that: described conducting ring is sleeved on main shaft, and carry out good insulation processing between conducting ring and main shaft according to claim 3.
5. a kind of wheel hub, to the lightning channel method of attachment in cabin, is characterized in that: described conducting ring is fixedly mounted on surface or inner surface outside hubcap/engine room cover by screw or rivet according to claim 3.
6. a kind of wheel hub, to the lightning channel method of attachment in cabin, is characterized in that according to claim 2: described conducting ring is to be made up of the annular conduction flat surface directly processing in described hubcap or engine room cover.
7. a kind of wheel hub, to the lightning channel method of attachment in cabin, is characterized in that according to claim 1: described conduction brush is brush shape electric contacting part, comprises carbon brush, conduction hairbrush, conductive fiber brush, elastic sheet metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210414541.XA CN102946037B (en) | 2012-10-26 | 2012-10-26 | Method for connecting lightning channel from hub to cabin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210414541.XA CN102946037B (en) | 2012-10-26 | 2012-10-26 | Method for connecting lightning channel from hub to cabin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102946037A CN102946037A (en) | 2013-02-27 |
| CN102946037B true CN102946037B (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210414541.XA Expired - Fee Related CN102946037B (en) | 2012-10-26 | 2012-10-26 | Method for connecting lightning channel from hub to cabin |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201854023U (en) * | 2010-11-26 | 2011-06-01 | 哈尔滨哈飞工业有限责任公司 | Lightning protection system of wind generating set |
| CN201916132U (en) * | 2010-12-13 | 2011-08-03 | 哈尔滨哈飞工业有限责任公司 | Lightning protection device for wind generating set blade |
| CN201994656U (en) * | 2011-02-24 | 2011-09-28 | 华锐风电科技(江苏)有限公司 | Large-scale lightning protection system for marine wind generating set |
| CN202326035U (en) * | 2011-11-16 | 2012-07-11 | 济南轨道交通装备有限责任公司 | Blade lightning protection device for wind generating set |
| CN102646909A (en) * | 2012-04-24 | 2012-08-22 | 广东明阳风电产业集团有限公司 | Lightning-protection brush used for lightning-protection conducting ring of vane of wind driven generator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3870149B2 (en) * | 2002-10-07 | 2007-01-17 | キヤノン株式会社 | Electronic device and display method of electronic device |
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2012
- 2012-10-26 CN CN201210414541.XA patent/CN102946037B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201854023U (en) * | 2010-11-26 | 2011-06-01 | 哈尔滨哈飞工业有限责任公司 | Lightning protection system of wind generating set |
| CN201916132U (en) * | 2010-12-13 | 2011-08-03 | 哈尔滨哈飞工业有限责任公司 | Lightning protection device for wind generating set blade |
| CN201994656U (en) * | 2011-02-24 | 2011-09-28 | 华锐风电科技(江苏)有限公司 | Large-scale lightning protection system for marine wind generating set |
| CN202326035U (en) * | 2011-11-16 | 2012-07-11 | 济南轨道交通装备有限责任公司 | Blade lightning protection device for wind generating set |
| CN102646909A (en) * | 2012-04-24 | 2012-08-22 | 广东明阳风电产业集团有限公司 | Lightning-protection brush used for lightning-protection conducting ring of vane of wind driven generator |
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| Publication number | Publication date |
|---|---|
| CN102946037A (en) | 2013-02-27 |
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Granted publication date: 20141112 |