Lightning protection lightning receiving device, fan blade and wind generating set
阅读说明:本技术 防雷接闪装置、风机叶片和风力发电机组 (Lightning protection lightning receiving device, fan blade and wind generating set ) 是由 付磊 赵雄 于 2019-12-04 设计创作,主要内容包括:本发明提供一种防雷接闪装置、风机叶片和风力发电机组。防雷接闪装置包括:接闪器,接闪器具有彼此面对的上端面和下端面,并具有从下端面开设的第一结合孔;导流体,导流体设置在接闪器的下方,并且导流体具有穿透导流体的上端面和下端面的第二结合孔;导电支架,导电支架包括安装端和连接端,安装端通过依次插入并固定到第二结合孔和第一结合孔中而与导流体和接闪器连接,以使导流体的上端面与接闪器的下端面实现端面接触,连接端用于与引下线连接。根据本发明,接闪器的安装更牢固、不容易松动,保证接闪器接收的雷电能够可靠地传导至导流体,并防止接闪器的螺纹连接部位发生局部熔融焊接而导致接闪器不容易拆卸和更换。(The invention provides a lightning protection lightning receiving device, a fan blade and a wind generating set. Lightning protection connects sudden strain of a muscle device to include: the lightning arrester is provided with an upper end surface and a lower end surface which face each other, and is provided with a first combining hole formed from the lower end surface; the flow guide body is arranged below the lightning receptor and is provided with a second combination hole penetrating through the upper end surface and the lower end surface of the flow guide body; the conductive support comprises a mounting end and a connecting end, the mounting end is connected with the current carrier and the lightning arrester by being sequentially inserted into and fixed to the second combination hole and the first combination hole, so that the upper end face of the current carrier is in end face contact with the lower end face of the lightning arrester, and the connecting end is used for being connected with a down conductor. According to the invention, the lightning receptor is more firmly installed and is not easy to loosen, lightning received by the lightning receptor can be reliably transmitted to the flow guide body, and the lightning receptor is prevented from being difficult to disassemble and replace due to local fusion welding at the threaded connection part of the lightning receptor.)
1. A lightning protection lightning receptor, characterized in that the lightning protection lightning receptor (100) comprises:
a lightning receptor (10), said lightning receptor (10) having an upper end face (11) and a lower end face (12) facing each other, and having a first coupling hole (13) opening from said lower end face (12);
a current carrier (20), the current carrier (20) being arranged below the lightning receptor (10), and the current carrier (20) having a second coupling hole (23) penetrating an upper end face (21) and a lower end face (22) of the current carrier (20);
conductive support (30), conductive support (30) are including installation end (31) and link (32), installation end (31) through insert in proper order and fix to second combination hole (23) with in first combination hole (13) and with baffle (20) with arrester (10) are connected, so that baffle (20) up end (21) with arrester (10) down terminal surface (12) realize the end face contact, link (32) are used for being connected with the downlead.
2. The lightning protection lightning arrester according to claim 1, wherein the second combining hole (23) and the first combining hole (13) are both internally threaded holes, the second combining hole (23) and the first combining hole (13) are coaxially arranged and have the same diameter, the mounting end (31) is provided with an external thread, and the mounting end (31) is in threaded connection with the first combining hole (13) and the second combining hole (23).
3. The lightning protection device according to claim 2, wherein the internally threaded bore is a prefabricated internally threaded bore and the external thread is a prefabricated external thread.
4. The lightning protection device according to claim 1, characterized in that the distance from the outer wall of the lightning receptor (10) to the center of the first coupling hole (13) in a horizontal direction perpendicular to the axial direction of the lightning receptor (10) is at least 2mm larger than the radius of the first coupling hole (13).
5. The lightning protection lightning conductor arrangement according to claim 1, characterized in that the current carrier (20) tapers in cross-section in the direction from the upper end face (21) to the lower end face (22) of the current carrier (20).
6. The lightning protection lightning receptor according to claim 5, characterized in that the current carrier (20) is formed in the shape of an inverted truncated cone, the diameter of the upper end surface (21) of the current carrier (20) being equal to the diameter of the lower end surface (12) of the lightning receptor (10).
7. The lightning protection device according to claim 1, characterized in that the lightning protection device (100) further comprises an insulating protective sheath (50) encasing the conductive support (30).
8. The lightning protection device according to any one of claims 1 to 7, wherein the electrically conductive bracket (30) is L-shaped to form an L-shaped lightning protection device, one end of the L-shaped electrically conductive bracket (30) being the mounting end (31) and the other end of the electrically conductive bracket (30) being the connection end (32).
9. The lightning protection device according to any one of claims 1 to 7, characterized in that the electrically conductive support (30) is Y-shaped to form a Y-shaped lightning protection device, the Y-shaped electrically conductive support (30) comprising a first trunk (301) and a first branch (302) and a second branch (303), the first branch (302) and the second branch (303) extending from one end of the first trunk (301) towards a direction away from the first trunk (301) and away from each other,
the end of the first branch (302) and the end of the second branch (303) are both the mounting ends (31), each mounting end (31) is provided with the lightning receptor (10) and the current conductor (20),
the other end of the first trunk (301) is the connecting end (32).
10. The lightning protection device according to any one of claims 1 to 7, characterized in that the electrically conductive support (30) is cross-shaped to form a cross-shaped lightning protection device, the cross-shaped electrically conductive support (30) comprising a second trunk (304) and a third branch (305) and a fourth branch (306), the third branch (305) and the fourth branch (306) extending from the middle of the second trunk (304) towards both sides, respectively,
the end of the third branch (305) and the end of the fourth branch (306) are both the mounting ends (31), each mounting end (31) is provided with the lightning receptor (10) and the current conductor (20),
one end of the second trunk (304) is the connecting end (32), and the other end of the second trunk (304) is used for connecting a blade tip lightning receptor.
11. A wind turbine blade, characterized in that the wind turbine blade (200) comprises a lightning protection lightning receptor (100) according to any one of claims 1-10.
12. A fan blade is characterized in that a blade body is provided with a plurality of blades,
the cross lightning protection device according to claim 10 is arranged at the tip of the fan blade (200), the upper end face (11) of the lightning receptor (10) of the cross lightning protection device is flush with the pressure face (201) and the suction face (202) of the fan blade (200), respectively,
and/or between the tip of the fan blade (200) and the middle of the fan blade (200) there is provided a Y-type lightning protection lightning receptor according to claim 9, the upper end face (11) of the lightning receptor (10) of the Y-type lightning protection lightning receptor being flush with the pressure face (201) and the suction face (202) of the fan blade (200), respectively,
and/or, between the middle of the fan blade (200) and the root of the fan blade (200), the L-shaped lightning protection lightning receptor device according to claim 8 is provided in pairs, the upper end faces (11) of the lightning receptors (10) of the paired L-shaped lightning protection lightning receptor device being flush with the pressure face (201) and the suction face (202) of the fan blade (200), respectively.
13. A wind park according to claim 11 or 12, wherein the wind park comprises a fan blade according to claim 11 or 12.
Technical Field
The invention relates to the technical field of wind power generation, in particular to a lightning protection lightning receiving device, a fan blade and a wind generating set.
Background
The wind generating set is used as a high and large metal building and is easy to be struck by lightning. The blade is the highest part in the wind generating set, and the probability of lightning strike is higher. In order to reduce the damage of lightning to the blade, lightning receptor systems are installed inside and on the surface of the blade.
The lightning arrester system comprises a lightning arrester, a lightning arrester base and a down conductor. The lightning receptor is arranged on the outer surface of the blade and is used for intercepting lightning current. The lightning arrester is connected with the down lead through the conductive support and is electrically protected to form an integral lightning arrester system.
At present, the connection between the lightning receptor and the lightning receptor base mostly adopts a scheme of directly connecting threads, and a conduction path of current is established by means of the threaded connection of the lightning receptor and the lightning receptor base.
To ensure a good connection of the conduction path, the threaded surfaces of the lightning receptor and the lightning receptor base must be smooth and flat, while the threads should be in intimate contact. However, it may be difficult to ensure the quality of the thread surface for process reasons, thus resulting in poor contact between the threads and unfavorable conduction of lightning current. And, the lightning arrester is direct through threaded connection to the lightning arrester base, and the anti-looseness measure of no screw thread, is in the not hard up state easily at the fan blade in-process of cycle circumference operation for a long time, neither does not benefit to the conduction of lightning current, also takes place easily and drops the danger.
In addition, because the lightning receptor is directly connected to the lightning receptor base through threads, in the lightning current conduction process, strong current is easily formed at the threaded connection point, local fusion welding is caused, the lightning receptor and the conductive support are fixed, and the lightning receptor is not beneficial to the disassembly and replacement of parts. In addition, the existing lightning receiving system mostly adopts manual thread processing after the blade is formed, so that the thread quality is difficult to ensure, and local fusion welding is more easily caused.
Disclosure of Invention
It is an object of the present invention to provide a lightning protection lightning receptor, a fan blade and a wind turbine generator, which enable a more secure mounting of the lightning receptor, which is less prone to loosening, and which enable easy dismounting and replacement of the lightning receptor.
Another object of the present invention is to provide a lightning protection lightning receptor, a fan blade and a wind turbine generator that can ensure reliable conduction of lightning current.
It is a further object of the present invention to provide a lightning protection lightning receptor, a fan blade and a wind turbine generator which are capable of ensuring the aerodynamic performance of the blade.
It is yet another object of the present invention to provide a lightning protection lightning receptor, a fan blade and a wind turbine generator that can be adapted to varying internal spaces of the fan blade.
According to an aspect of the present disclosure, there is provided a lightning protection lightning receptor, including: the lightning arrester is provided with an upper end surface and a lower end surface which face each other, and is provided with a first combining hole formed from the lower end surface; the flow guide body is arranged below the lightning receptor and is provided with a second combination hole penetrating through the upper end surface and the lower end surface of the flow guide body; the conductive support comprises a mounting end and a connecting end, the mounting end is connected with the current carrier and the lightning arrester by being sequentially inserted into and fixed to the second combination hole and the first combination hole, so that the upper end face of the current carrier is in end face contact with the lower end face of the lightning arrester, and the connecting end is used for being connected with a down conductor.
Optionally, the second combining hole and the first combining hole are both internal threaded holes, the second combining hole and the first combining hole are coaxially arranged and have the same diameter, the mounting end is provided with external threads, and the mounting end is in threaded connection with the first combining hole and the second combining hole.
Optionally, the internal threaded bore is a preformed internal threaded bore and the external thread is a preformed external thread.
Optionally, the distance from the outer wall of the lightning receptor to the centre of the first coupling hole in a horizontal direction perpendicular to the axial direction of the lightning receptor is at least 2mm larger than the radius of the first coupling hole.
Optionally, the cross-section of the current carrier tapers in a direction from the upper end surface to the lower end surface of the current carrier.
Optionally, the current carrier is formed in the shape of an inverted circular truncated cone, and a diameter of an upper end surface of the current carrier is equal to a diameter of a lower end surface of the lightning receptor.
Optionally, the lightning protection lightning arrester further includes an insulating protective sheath covering the conductive support.
Optionally, a conductive bracket) is L-shaped to form an L-shaped lightning protection lightning receptor, one end of the L-shaped conductive bracket being a mounting end and the other end of the conductive bracket being a connection end.
Optionally, the conductive bracket is Y-shaped to form a Y-type lightning protection lightning arrester, and the Y-shaped conductive bracket includes a first trunk, and a first branch and a second branch, which extend from one end of the first trunk toward a direction away from the first trunk and are away from each other. The tip of first branch and the tip of second branch are the installation end, all install lightning receptor and baffle on every installation end. The other end of the first trunk is a connecting end.
Optionally, the conductive bracket is cross-shaped to form a cross-shaped lightning protection lightning arrester, the cross-shaped conductive bracket includes a second trunk and a third branch) and a fourth branch, the third branch and the fourth branch extend from the middle of the second trunk towards both sides, respectively. The tip of third branch and the tip of fourth branch are the installation end, all install the arrester and the baffle on every installation end. One end of the second trunk is a connecting end, and the other end of the second trunk is used for connecting the blade tip lightning receptor.
According to another aspect of the present disclosure, a wind turbine blade is provided, the wind turbine blade comprising a lightning protection lightning receptor as above.
According to still another aspect of the present disclosure, a fan blade is provided, wherein the tip of the fan blade is provided with the above cross lightning protection lightning arrester, and the upper end surface of the lightning arrester of the cross lightning protection lightning arrester is flush with the pressure surface and the suction surface of the fan blade respectively. Be provided with such Y type lightning protection lightning arrester between fan blade's pointed end and fan blade's middle part, the up end of Y type lightning protection lightning arrester's arrester flushes with fan blade's pressure surface and suction surface respectively. Between the middle part of fan blade and the root of fan blade, set up L type lightning protection lightning arrester as above in pairs, the up end of the lightning arrester of L type lightning protection lightning arrester device in pairs flushes with the pressure surface and the suction surface of fan blade respectively.
According to a further aspect of the present disclosure, there is provided a wind power plant comprising a fan blade as above.
According to the invention, the flow guide body which is contacted with the end face of the lightning receptor is arranged below the lightning receptor, so that the lightning receptor can be more firmly installed and is not easy to loosen, the lightning receptor is prevented from falling off, and the lightning received by the lightning receptor can be reliably conducted to the flow guide body. In addition, lightning current is conducted to electrically conductive support through the current collector via the baffle and not conducted to electrically conductive support via the threaded connection department of lightning receptor, can prevent that the threaded connection position of lightning receptor from taking place local fusion welding and leading to the lightning receptor to be difficult to dismantle and change.
According to the lightning arrester, the section of the current conductor is gradually reduced, so that lightning current can be gradually conducted to the conductive bracket, and local fusion welding caused by strong current formed at the threaded connection point of the lightning arrester is avoided. In addition, the quality of the thread can be improved by prefabricating internal threads in the first combining hole and the second combining hole and prefabricating external threads at the mounting end, so that local fusion welding at the threaded connection part is avoided, and the quality of threaded connection is improved.
According to the invention, the positions of the current carrier and the lightning receptor on the threads of the mounting end of the electrically conductive support can be adjusted up and down to ensure that the lightning receptor is flush with the outer surface of the blade, thereby ensuring the quality and aerodynamic performance of the outer surface of the blade.
According to the invention, the conductive bracket has various forms to form different types of lightning protection lightning arrester, and different types of lightning protection lightning arrester can be flexibly selected according to the installation position of the fan blade and the corresponding internal space.
Drawings
FIG. 1 is a schematic diagram of an L-shaped lightning protection lightning receptor according to an embodiment of the invention;
FIG. 2 is a partial cross-sectional view of an L-shaped lightning protection lightning receptor according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a Y-type lightning protection lightning receptor according to an embodiment of the invention;
FIG. 4 is a schematic view of a cross-type lightning protection lightning receptor according to an embodiment of the invention;
FIG. 5 is a perspective view of an L-shaped lightning protection receptor including an insulating protective sheath according to an embodiment of the invention;
FIG. 6 is a cross-sectional view of the lightning protection lightning receptor of FIG. 5;
FIG. 7 is a schematic view of a wind turbine blade to which a lightning protection lightning receptor according to an embodiment of the invention is applied;
FIG. 8 is a cross-sectional view taken along line A-A of the fan blade of FIG. 7;
FIG. 9 is a cross-sectional view taken along line B-B of the fan blade of FIG. 7;
FIG. 10 is a cross-sectional view taken along line C-C of the fan blade of FIG. 7.
Detailed Description
First, a lightning protection device according to an embodiment of the present invention will be described with reference to fig. 1 to 6.
As shown in fig. 1 to 6, a
In order to describe the positional relationship of the lightning
Fig. 1 and 2 show a lightning protection lightning receptor according to an embodiment of the invention.
As shown in fig. 1 and 2, a lightning protection lightning receptor according to an embodiment of the invention comprises a
According to an embodiment of the present invention, the
According to an embodiment of the invention, the
An upper end face 11 of the
According to an embodiment of the invention, the
According to an embodiment of the invention, the
According to an embodiment of the present invention, the
In addition, according to an embodiment of the present invention, since
According to an embodiment of the present invention, as shown in fig. 1, the
According to an embodiment of the present invention, the mounting
When installing the
According to the embodiment of the present invention, by properly tightening the
In addition, by the multi-part threaded coupling of the
Furthermore, according to an embodiment of the present invention, the position of
In addition, according to an embodiment of the present invention, a cross-section of
It is understood that lightning current has a skin effect that conducts along the metal surface. The skin effect is a thin layer with current conduction concentrated on the outer surface of the conductor, and the closer to the surface of the conductor, the higher the current density is, and the smaller the current is actually in the conductor.
According to an embodiment of the present invention, lightning current may be conducted along a thin layer of the outer surface of the
On the
Therefore, according to the embodiment of the present invention, by contacting the
As described above, according to the embodiment of the present invention, the
Further, according to the embodiment of the present invention, the
In the above, an L-shaped lightning protection device according to an embodiment of the invention is described, and in the following, a Y-shaped lightning protection device and a cross-shaped lightning protection device according to an embodiment of the invention will be described with reference to fig. 3 and 4, respectively. In order to avoid repetitive descriptions, only the differences between the Y-shaped lightning protection receptor and the cross-shaped lightning protection receptor and the L-shaped lightning protection receptor will be described.
As shown in fig. 3, the
According to an embodiment of the invention, the end of the
According to an embodiment of the invention, the other end of the
As shown in fig. 4, the
According to an embodiment of the invention, the end of the
According to an embodiment of the invention, one end of the
Fig. 5 is a perspective view of an L-shaped lightning protection receptor including an insulating protective sheath according to an embodiment of the invention, and fig. 6 is a cross-sectional view of the lightning protection receptor of fig. 5. In fig. 5 and 6, the
According to an embodiment of the present invention, as shown in fig. 5 and 6, the
The Y-type lightning protection device and the cross-type lightning protection device shown in fig. 3 and 4 may also include an insulating protective sheath as described above, which is not described in detail herein.
The L-type lightning protection lightning arrester, the Y-type lightning protection lightning arrester, and the cross lightning protection lightning arrester have been described above with reference to the drawings, and the L-type lightning protection lightning arrester, the Y-type lightning protection lightning arrester, or the cross lightning protection lightning arrester can be flexibly selected according to the installation position of the
Fig. 7 shows a
As shown in fig. 8-10, the
As shown in fig. 7 and 8, according to the embodiment of the present invention, at a position close to the tip of the
As shown in fig. 7 and 9, the internal installation space of the
As shown in fig. 7 and 10, between the middle of the
The upper end face 11 of the
Although it is illustrated above with reference to fig. 7 to 10 that the lightning protection device is installed in the above manner according to the position of the fan blade, the present invention is not limited thereto. The lightning protection lightning arrester can be flexibly selected or freely combined by a person skilled in the art according to the internal space characteristics of the fan blade.
Another embodiment of the present invention also provides a wind park comprising a wind turbine blade as shown in fig. 7.
As described above, according to the present invention, at least the following technical effects can be achieved.
The flow guide body in contact with the end face of the lightning arrester is arranged below the lightning arrester, so that the lightning arrester can be installed more firmly and is not easy to loosen, the lightning arrester is prevented from falling off, and the lightning current received by the lightning arrester can be reliably conducted to the flow guide body.
Through making the cross-section of baffle convergent, consequently can conduct the lightning current to the baffle from the arrester, the rethread baffle transmits for electrically conductive support, can avoid forming the strong current at the threaded connection's between arrester and electrically conductive support point position, causes local fusion welding.
The positions of the current carrier and the lightning receptor on the threads of the mounting end of the conductive support can be adjusted up and down to ensure that the lightning receptor is flush with the outer surface of the blade, thereby ensuring the quality and aerodynamic performance of the outer surface of the blade.
The conductive support has multiple forms to form the lightning protection lightning arrester of different grade type to can be according to the mounted position of fan blade and the inner space that corresponds, the lightning protection lightning arrester of different grade type is selected in a flexible way.
Although a few embodiments of the present invention have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
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