CN102946037A - 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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- CN102946037A CN102946037A CN201210414541XA CN201210414541A CN102946037A CN 102946037 A CN102946037 A CN 102946037A CN 201210414541X A CN201210414541X A CN 201210414541XA CN 201210414541 A CN201210414541 A CN 201210414541A CN 102946037 A CN102946037 A CN 102946037A
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- hubcap
- lightning
- engine room
- conducting ring
- room cover
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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 a kind of wheel hub to the lightning channel method of attachment in cabin, by building a lightning protection passage that gets around main shaft, when avoiding the wind-powered electricity generation unit to be struck by lightning to machinery relevant in main shaft and wheel hub and the 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 the sea, thunderbolt all is one of key factor that affects safe operation of wind turbine.When blower fan was struck by lightning, huge lightning current can be injected into wheel hub by blade or radome fairing, enters the cabin by wheel hub again, arrived earthing device through tower cylinder or ground wire, finally spilt into the earth.
In the fan operation process, the relative cabin of wheel hub rotates, and is finished the mechanical connection in wheel hub and cabin by main shaft; Because main shaft is made of metal, objectively formed a wheel hub to the electric path in cabin; Based on this path, traditional wind-powered electricity generation lightning-protection system is with the part of main shaft as lightning channel.Yet, long-term operation practice shows, main shaft is also unreliable and very dangerous as the part of lightning channel, when huge lightning current passes through main shaft, because 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 might puncture the bearing of main shaft, cause main shaft bearing to be corroded by lightning current, directly break down or greatly shorten the service life of main shaft; Simultaneously, this mode requires in the wheel hub and the electric component on the gear box reaches 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 during as lightning current passage a part of, for reliability and the fail safe that guarantees main shaft, or select the bearing that can bear corresponding lightning current; Main shaft bearing is carried out insulation processing, the potential difference that produces in the time of can bearing thunderbolt.But these methods all can increase cost by a relatively large margin, and are real inadvisable, are necessary the lightning channel of the wheel hub of traditional wind-powered electricity generation unit by main shaft to the cabin improved, and 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 a kind of wheel hub to the lightning channel method of attachment in cabin; lightning current is protected the inner relevant electric and mechanical system of wind turbine generator better to the erosion of main shaft when having avoided the wind-powered electricity generation unit to be struck by lightning.
In order to realize the foregoing invention purpose, 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 subjected to of hubcap, the other end is connected with the thunder conductor that is subjected 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 the conduction brush has consisted of the electrical connection passage under the rotation status between hubcap and the engine room cover.
Further, described conducting ring or be positioned at outside hubcap/engine room cover; Perhaps be positioned at hubcap/engine room cover; Perhaps 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 the main shaft, and carries out good insulation and process 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 of the annular conduction flat surface that directly processes 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.
Further, described conduction brush arranges more than 1 or 1 along the conducting ring circumference; The brush end of conduction brush or with the outer side contacts of the conducting ring surfaces of revolution, perhaps with the interior side contacts of the conducting ring surfaces of revolution, perhaps 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 subjected to the good electrical connection of thunder conductor with engine room cover/hubcap.
Operation principle of the present invention is: conduction brush and conducting ring formation lightning channel have been realized the electrical connection under the state that rotatablely moves between hubcap and the engine room cover, and when wind-force was not enough, the relative engine room cover of hubcap was moved without spin; When wind-force reaches a certain size, wheel hub relative cabin rotation; The lightning channel that brush and conducting ring consist of can both provide good electrical connection to the 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 subjected to of hubcap, the other end is connected with the thunder conductor that is subjected to of engine room cover, when the lightning current from blade or hubcap arrives, the lightning channel that lightning current consists of by brush and conducting ring conducts to the thunder conductor that is subjected to of engine room cover, and not by main shaft and wheel hub.Because lightning current is by main shaft and wheel hub, so main shaft and the wheel hub destruction that avoids being struck by lightning.Simultaneously, in lightning stroke process, each electric component also significantly descends with respect to the potential difference of the equipotential body in cabin in the hubcap, and the electric component that whole system is relevant has all obtained effective protection.
Beneficial effect of the present invention is: 1, consist of lightning protection device based on the brush conducting ring, be used for the electrical connection of rotation status parts, lightning current is directed in the process of the earth, and by wheel hub, main shaft, gear box, related electric and mechanical system can not access good protection; 2, this installation cost is cheap, and the implementation method flexible and convenient is applied widely, is fit to use in batches.
Description of drawings
Fig. 1 embodiment one structural representation;
Fig. 2 embodiment one cross sectional representation;
Fig. 3 embodiment two structural representations
Wherein: 1, hubcap; 2, engine room cover; 3, conducting ring; 4, conduction brush; 5, main shaft; 6, brush carrier; 7, screw
Embodiment
The present invention is further illustrated below in conjunction with embodiment.
According to the structure of wind-powered electricity generation unit, when being struck by lightning in wind turbine generator, in general, lightning current can be injected into wheel hub by blade or radome fairing, enters the cabin through main shaft by wheel hub again, arrives ground finally by the tower cylinder.
The invention provides a kind of wheel hub 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 subjected to of hubcap, the other end is connected with the thunder conductor that is subjected 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 the conduction brush has consisted of the electrical connection passage under the rotation status between hubcap and the engine room cover.Be subjected to the thunder conductor to refer to conducting metal or cable for the conduction thunder and lightning, or itself conducting position in engine room cover or the hubcap, can be used for the 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 that conducting ring is positioned at hubcap or engine room cover and main shaft 1, 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 the engine room cover.
According to the access path of lightning channel, can adopt conduction brush to be connected with the thunder conductor that is subjected to of hubcap, conducting ring is connected with the thunder conductor that is subjected to of engine room cover; Perhaps conduction brush is connected with the thunder conductor that is subjected to of engine room cover, and conducting ring is connected with the thunder conductor that is subjected 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 provides the brush shape electric contacting part of electrical contact, can be carbon brush, the conduction hairbrush, and the 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 the mechanical structure above the main shaft; It can also be the smooth part that when hubcap, engine room cover or spindle processing, processes specially.
These connected modes can be according to actual overview, and freely random Selection and Constitute mode only has the mode by conducting ring and brush, and the hubcap under the realization rotation status and the good electrical connection of engine room cover all can realize goal of the invention.The technical scheme derivative based on inventive concept all falls within protection scope of the present invention.
Below in conjunction with accompanying drawing, the present invention is described in detail.
Embodiment one
Adopting special-purpose conducting ring to be installed in form between hubcap and the engine room cover as example, when thunderbolt occured, the arrester of vane tip was subjected to the thunder conductor with lightning current by what the leakage path between blade and the hubcap passed to hubcap.Present hubcap/engine room cover is made mainly with fiberglass or aluminum alloy materials, and the hubcap of metal material itself is exactly to be subjected to the thunder conductor, and the thunder conductor that is subjected 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, conducting slip ring 3 and the main shaft 5 of special use is installed between hubcap 1 and the engine room cover 2 with one heart, is fixedly mounted on hubcap 1 inner surface by screw 7,3 conduction brush 4 equidistantly are installed on the engine room cover 2 by brush carrier 6 circumference.To guarantee during installation that the conductive metal wire foundation of laying in conducting ring and conduction brush and hubcap and the engine room cover is electrically connected reliably.
In the fan operation process, the relative cabin of wheel hub rotates, and the conducting slip ring that is fixedly mounted on the hubcap inner surface rotates with hubcap; The conduction brush that is fixedly mounted on the engine room cover contacts with the conducting ring sliding type, is subjected to the thunder conductor with what the electric current on the conducting ring was introduced engine room cover, realizes the lightning protection purpose to the wind-powered electricity generation unit.
Embodiment two
The present invention will be described as example directly to process conducting ring on hubcap for embodiment two.When hubcap or engine room cover are metals when making, can be by processing simultaneously smooth circumferentia as conducting ring when the processing hubcap.As shown in Figure 3, the flat surface of processing on hubcap 1 has consisted of conducting slip ring 3, and the conduction brush 4 shown in the figure adopts elastic sheet metal, and elastic sheet metal one end welds or is threaded on the engine room cover 2, and an end contacts with the surface sliding of conducting slip ring 3.The elastic sheet metal multi-disc arranges, and the lightning channel of formation is directed to engine room cover with the lightning current on the hubcap through conducting ring, elastic sheet metal, and lightning current was without main shaft 5 when thunderbolt occured.The benefit of this mode is that electrical connection is reliable, need not use special electric brush slip ring.
Above-mentioned execution mode only is preferred implementation of the present invention; protection scope of the present invention is not imposed any restrictions; those of ordinary skills are not breaking away from distortion and the retouching of doing under the enlightenment of essence of the present invention and technology; all should be considered as within protection scope of the present invention, protection scope of the present invention is decided on its claims.
Claims (8)
1. lightning channel method of attachment that wheel hub arrives the 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 subjected to of hubcap, the other end is connected with the thunder conductor that is subjected 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 the conduction brush has consisted of the electrical connection passage under the rotation status between hubcap and the engine room cover.
2. described a kind of wheel hub is characterized in that to the lightning channel method of attachment in cabin according to claim 1: described conducting ring or be positioned at outside hubcap/engine room cover; Perhaps be positioned at hubcap/engine room cover; Perhaps between hubcap and engine room cover.
3. described a kind of wind-powered electricity generation unit lightening arresting method according to claim 1 and 2, it is characterized in that: described conducting ring is the electric slip ring that is specifically designed to conduction.
4. described a kind of wheel hub is to the lightning channel method of attachment in cabin according to claim 3, and it is characterized in that: described conducting ring is sleeved on the main shaft, and carries out good insulation and process between conducting ring and main shaft.
5. described a kind of wheel hub is to the lightning channel method of attachment in cabin according to claim 3, and it is characterized in that: described conducting ring is fixedly mounted on surface or inner surface outside hubcap/engine room cover by screw or rivet.
6. described a kind of wheel hub is characterized in that to the lightning channel method of attachment in cabin according to claim 2: described conducting ring is to be made of the annular conduction flat surface that directly processes in described hubcap or engine room cover.
7. described a kind of wheel hub is characterized in that to the lightning channel method of attachment in cabin according to claim 1: described conduction brush is brush shape electric contacting part, draws together carbon brush, conduction hairbrush, conductive fiber brush, elastic sheet metal.
8. according to claim 1,2,4,5,6 or 7 each described a kind of wheel hubs are to the lightning channel method of attachment in cabin, it is characterized in that: described conduction brush arranges more than 1 or 1 along the conducting ring circumference; The brush end of conduction brush or with the outer side contacts of the conducting ring surfaces of revolution, perhaps with the interior side contacts of the conducting ring surfaces of revolution, perhaps 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 subjected to the good electrical connection of thunder conductor with engine room cover/hubcap.
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 true CN102946037A (en) | 2013-02-27 |
| CN102946037B CN102946037B (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210414541.XA Active CN102946037B (en) | 2012-10-26 | 2012-10-26 | Method for connecting lightning channel from hub to cabin |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003208295A (en) * | 2002-10-07 | 2003-07-25 | Canon Inc | Electronic equipment and displaying method for electronic equipment |
| 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 |
-
2012
- 2012-10-26 CN CN201210414541.XA patent/CN102946037B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003208295A (en) * | 2002-10-07 | 2003-07-25 | Canon Inc | Electronic equipment and displaying method for electronic equipment |
| 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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| CN102946037B (en) | 2014-11-12 |
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