CN211692705U - Blade and wind generating set - Google Patents
Blade and wind generating set Download PDFInfo
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- CN211692705U CN211692705U CN202020211743.4U CN202020211743U CN211692705U CN 211692705 U CN211692705 U CN 211692705U CN 202020211743 U CN202020211743 U CN 202020211743U CN 211692705 U CN211692705 U CN 211692705U
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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 relates to a blade and wind generating set, the blade includes: the shell comprises a shell body and a cavity formed by enclosing the shell body, the shell body is provided with a front edge and a rear edge which are distributed oppositely in the chord direction of the shell body, and the shell body comprises a first area and a second area which are sequentially distributed in the direction from the front edge to the rear edge; a functional device disposed in the first region; the lightning protection device sets up in the shell, and lightning protection device is including electrically conductive connecing to dodge the subassembly and with the ground connection piece that electrically conductive connecing to dodge the subassembly electricity and be connected, electrically conductive connecing to dodge the subassembly and be located the second region and with the function device mutual interval, ground connection piece is used for ground connection. The embodiment of the utility model provides a blade and wind generating set, blade have the lightning protection function, can effectually avoid the regional function device of core to be damaged by the thunder and lightning, and then guarantee wind generating set's economic benefits.
Description
Technical Field
The utility model relates to a wind-powered electricity generation technical field especially relates to a blade and wind generating set.
Background
As thunder can damage high-rise buildings, for example, with the continuous development of the technical field of wind power, the size of a wind generating set is continuously increased, and the damage of blades caused by the attack of thunder is increased. Correspondingly, in order to avoid the blade from being struck by lightning as much as possible, a corresponding protection device needs to be arranged, and the current is guided to the ground through the protection device, so that the operation safety of the wind generating set is ensured.
However, due to the fact that the protective device in the prior art is not reasonable in arrangement position, functional devices in the corresponding area of the blade, such as a deicing functional element, are prone to being damaged by lightning, and economic loss is large.
Therefore, a new blade and a wind turbine generator set are needed.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a blade and wind generating set, blade have the lightning protection function, can effectually avoid the regional function device of core to be damaged by the thunder and lightning, and then guarantee wind generating set's economic benefits.
On the one hand, according to the utility model provides a blade is proposed, include: the shell comprises a shell body and a cavity formed by enclosing the shell body, the shell body is provided with a front edge and a rear edge which are distributed oppositely in the chord direction of the shell body, and the shell body comprises a first area and a second area which are sequentially distributed in the direction from the front edge to the rear edge; a functional device disposed in the first region; the lightning protection device sets up in the shell, and lightning protection device is including electrically conductive connecing to dodge the subassembly and with the ground connection piece that electrically conductive connecing to dodge the subassembly electricity and be connected, electrically conductive connecing to dodge the subassembly and be located the second region and with the function device mutual interval, ground connection piece is used for ground connection.
According to an aspect of the embodiment of the present invention, the blade further includes an insulating member provided in the first region, so that an insulation resistance of the first region is greater than an insulation resistance of the second region.
According to an aspect of the embodiment of the present invention, the insulating member includes a first insulating layer, the first insulating layer and the shell body are of an integral structure, and the first insulating layer is a glass fiber layer or a paint layer; and/or the insulating part comprises a second insulating layer, the second insulating layer is attached to the surface, far away from the cavity, of the shell body, and the second insulating layer is a glass fiber layer or a paint layer.
According to the utility model discloses an aspect, electrically conductive minimum distance more than or equal to 100mm between connecing sudden strain of a muscle subassembly and the functional device.
According to an aspect of an embodiment of the present invention, the conductive lightning receiving component is disposed on a surface of the shell body away from the cavity; the conductive lightning receiving component comprises a lightning receptor and a metal net electrically connected with the lightning receptor, and the conductive lightning receiving component is electrically connected with the grounding piece through the lightning receptor.
According to one aspect of the embodiment of the present invention, the metal mesh is an integral structure extending along the length direction of the shell body, and the number of the lightning receptors is one;
or the metal net is an integrated structure extending along the length direction of the shell body, the number of the lightning receptors is more than two, the two lightning receptors are arranged at intervals in the length direction, and each lightning receptor is electrically connected with the grounding piece;
or, the metal mesh includes a plurality of netted units, and a plurality of netted units set up along the length direction interval of shell body, and every netted unit is connected with at least one arrester, and every arrester is connected with ground connection piece electricity respectively.
According to an aspect of an embodiment of the present invention, the weight of the metal mesh per square meter is 150g to 800 g; and/or, in the chord direction, the width of the metal net is 100 mm-600 mm; and/or the metal mesh extends 1/3-2/3 of the total length of the shell body in the length direction of the shell body.
According to an aspect of the embodiment of the present invention, the shell body has a tip portion and a root portion in a length direction thereof, the tip portion is an electric conductor and is electrically connected to the ground member, the metal mesh extends a predetermined distance in the length direction, and a distance between one end of the metal mesh near the tip portion and the tip portion is greater than or equal to 3 m; and/or the distance between the edge of the metal mesh facing the trailing edge and the trailing edge is 250 mm-800 mm.
According to an aspect of an embodiment of the present invention, the functional device includes a heating deicing layer integrated in the shell body; and/or the functional device further comprises a main beam which is arranged in the cavity and connected with the shell body, and/or the functional device further comprises a rear edge auxiliary beam which is arranged on the rear edge; and/or the functional device further comprises a pneumatic performance improving device, and the pneumatic performance improving device is arranged on the shell body.
On the other hand, according to the embodiment of the utility model, a wind generating set is proposed, including foretell blade.
According to the embodiment of the utility model provides a blade and wind generating set, the blade includes the shell, functional device and lightning protection device, because the shell body of shell has relative distribution's leading edge and trailing edge on self chord, and the direction by the directional trailing edge of leading edge is including the first region and the second region that distribute in proper order, it is located first region to prescribe a limit to the functional device simultaneously, lightning protection device's electrically conductive lightning receiving subassembly is located the second region and passes through ground connection spare ground connection, can enough satisfy the leading-in earth of electric current that produces when being struck by lightning with the blade through lightning protection device, and simultaneously, owing to place electrically conductive lightning receiving subassembly in the regional and interval setting of difference, can reduce the probability that the functional device is struck by the lightning, and then reduce economic loss, guarantee wind generating set's electricity generation benefit.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a wind turbine generator system according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a blade according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a housing according to an embodiment of the present invention;
FIG. 4 is a simplified structural diagram of a lightning protection device according to an embodiment of the invention;
FIG. 5 is a partial cross-sectional view of a blade according to an embodiment of the present invention;
FIG. 6 is a schematic partial structural view of a blade according to another embodiment of the present invention;
FIG. 7 is a schematic structural view of a blade according to yet another embodiment of the present invention;
FIG. 8 is a schematic structural view of a blade according to yet another embodiment of the present invention;
fig. 9 is a partial structural schematic view of a blade according to yet another embodiment of the present invention.
Wherein:
1-an impeller; x-chord direction; y-length direction;
100-blade; 10-a housing; 11-a shell body; 111-leading edge; 112-trailing edge; 113-tip section; 114-root of leaf; 11 a-a first region; 11 b-a second region; 12-a cavity;
20-a functional device; 21-heating the deicing layer; 22-a main beam;
30-lightning protection means; 31-a conductive lightning receptor component; 311-lightning receptors; 312-metal mesh; 312 a-mesh unit; 32-a ground;
41-a first insulating layer; 42-a second insulating layer;
200-a hub;
2-a generator; 3-a cabin; and 4, tower barrel.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present invention; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The directional terms appearing in the following description are directions shown in the drawings, and do not limit the specific structure of the blade and the wind turbine generator system of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as either a fixed connection, a removable connection, or an integral connection; can be directly connected or indirectly connected. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.
For better understanding of the present invention, a blade and a wind turbine generator set according to embodiments of the present invention will be described in detail below with reference to fig. 1 to 9.
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a wind turbine generator system according to an embodiment of the present invention.
The embodiment of the utility model provides a wind generating set, including a tower section of thick bamboo 4, cabin 3, generator 2 and impeller 1, cabin 3 sets up in the top of a tower section of thick bamboo 4, and generator 2 sets up in cabin 3, can be located cabin 3's inside, certainly also can be located cabin 3's outside. The impeller 1 comprises a hub 200 and a plurality of blades 100 connected to the hub 200, the impeller 1 being connected to the rotor of the generator 2 via its hub 200. When wind acts on the blades 100, the entire impeller 1 and the rotor of the generator 2 are driven to rotate, so that wind energy is converted into electric energy.
Because wind generating set's impeller 1 is in higher position, wind generating set is in the thunderstorm weather after in groups, and its blade 100 is easily wounded by thunder and lightning, on this basis, the embodiment of the utility model provides a new blade 100, this blade 100 can be produced alone as independent component and sell, of course, also can be used for wind generating set and as wind generating set's component. For better understanding of the blade 100 provided by the embodiment of the present invention, the blade 100 provided by the embodiment of the present invention will be described in detail below with reference to fig. 2 to 8.
Referring to fig. 2 to 4, fig. 2 shows a schematic structural diagram of a blade 100 according to an embodiment of the present invention, fig. 3 shows a schematic structural diagram of a shell 10 according to an embodiment of the present invention, and fig. 4 shows a schematic structural diagram of a lightning protection device 30 according to an embodiment of the present invention. The embodiment of the utility model provides a blade 100, including shell 10, functional device 20 and lightning protection device 30, shell 10 includes shell 11 and encloses by shell 11 and close the cavity 12 that forms, and shell 11 has leading edge 111 and trailing edge 112 at self chord direction X relative distribution, and by leading edge 111 to trailing edge 112's direction, shell 11 is including the first region 11a and the second region 11b of arranging in proper order. The functional device 20 is disposed in the first region 11a, the lightning protection device 30 is disposed in the shell 10, the lightning protection device 30 includes a conductive lightning receiving component 31 and a grounding component 32 electrically connected to the conductive lightning receiving component 31, the conductive lightning receiving component 31 is disposed in the second region 11b and spaced apart from the functional device 20, and the grounding component 32 is used for grounding.
The embodiment of the utility model provides a blade 100, owing to by the directional trailing edge 112's of leading edge 111 direction including the first region 11a and the second region 11b that distribute gradually, inject functional device 20 simultaneously and be located first region 11a, lightning protection device 30's electrically conductive lightning receptor subassembly 31 is located the second region 11b and through grounding member 32 ground connection, can enough satisfy the leading-in ground of electric current that produces when being struck by lightning with blade 100 through lightning protection device 30. Meanwhile, the functional device 20 and the conductive lightning receiving component 31 are arranged in different areas and at intervals, so that the conductive lightning receiving component 31 and the functional device 20 cannot be overlapped, even if partial current is not conducted into the ground by the lightning protection device 30 or even when the conductive lightning receiving component 31 is broken down, the functional device 20 cannot be damaged, the probability that the functional device 20 is damaged by the lightning can be reduced, the economic loss is reduced, and the power generation benefit of the wind generating set is ensured.
Referring to fig. 3, the blade 100 according to the embodiment of the present invention includes a shell body 11 of the outer shell 10 having a predetermined length, and a root portion 114 and a tip portion 113 in a length direction Y of the shell body, wherein the length direction Y intersects with the chord direction X, and is optionally perpendicular to each other.
Optionally, the first region 11a and the second region 11b divided by the dashed lines in fig. 3 are virtual dividing lines for facilitating the understanding of the scheme, which may not be provided on the actual blade 100 product, but only needs to be ensured to be divided into at least two regions in the direction from the leading edge 111 to the trailing edge 112 in the chord direction X, so that the conductive lightning receiving component 31 and the functional device 20 are located in different regions and spaced apart from each other.
It is understood that the number of the first regions 11a and the second regions 11b divided on the blade 100 along the chord direction X may be one, and is not limited to the above form, for example, in some other examples, the arrangement of the first regions 11a, the second regions 11b, and the first regions 11a may also be adopted, and the first regions 11a and the second regions 11b may be alternately arranged as the size allows. That is, in some examples, the regions where the functional devices 20 are disposed may be each referred to as a first region 11a, and the regions where the functional devices 20 are not disposed may be referred to as a second region 11 b. The mentioned functional device 20 may be a device for optimizing the performance of the envelope 10 of the blade 100, giving the blade 100 functions of high strength, deicing effect, pneumatic performance improvement, etc.
As an alternative embodiment, the minimum distance between the conductive lightning receptor component 31 and the functional device 20 is greater than or equal to 100 mm. Through the setting, the interval size between the conductive lightning receiving assembly 31 and the functional device 20 is ensured at a safe distance, the insulation characteristic between the conductive lightning receiving assembly 31 and the functional device 20 is ensured, and the current generated by lightning is prevented from damaging the functional device 20.
As an alternative embodiment, referring to fig. 2 to fig. 4, in the blade 100 provided in the above embodiments, the conductive lightning receptor 31 is disposed on the surface of the shell body 11 away from the cavity 12, the conductive lightning receptor 31 may include a lightning receptor 311 and a metal mesh 312 electrically connected to the lightning receptor 311, and the conductive lightning receptor 31 is electrically connected to the grounding element 32 through the lightning receptor 311. Electrically conductive lightning receiving component 31 adopts above-mentioned structural style, simple structure, and low cost, and can be reliable with the electric current transmission to ground connection piece 32 of thunder and lightning production, and then leading-in ground, the effectual thunder and lightning that avoids is hit shell 10 and functional device 20.
In some alternative embodiments, the metal mesh 312 may be a one-piece structure extending along the length direction Y of the shell body 11, the number of the lightning receptors 311 may be one, and the projection of the metal mesh 312 on the blade 100 covers the projection of the lightning receptors 311, so as to facilitate the conduction of the current generated by lightning. It is understood that the number of the lightning receptors 311 is limited to one, which is an alternative embodiment, and in some other examples, the number of the lightning receptors 311 may be two or more, and when the number of the lightning receptors is two or more, the two or more lightning receptors 311 may be arranged at intervals along the length direction Y of the shell body 11, and each lightning receptor 311 is electrically connected to the ground connector 32.
By limiting the number of the lightning receptors 311 to be more than two and arranging the lightning receptors at intervals along the length direction Y, the current generated by lightning can be transmitted to the grounding piece 32 through multiple points, and the safety performance of the lightning protection device 30 is improved.
In some optional embodiments, in the chord direction X of the shell body 11, the width of the metal mesh 312 is any value between 100mm and 600mm, including both 100mm and 600mm, and by limiting the width of the metal mesh 312 to any value between 100mm and 600mm, the coverage requirement of the lightning receptor 311 can be better satisfied, so as to optimize the lightning protection performance of the blade 100.
In some optional embodiments, the width of the metal mesh 312 may be any value between 100mm and 400mm, and the width of the metal mesh 312 adopts the above value range, so that the requirement for current transmission between the metal mesh 312 and the lightning receptor 311 can be optimized, and the metal wires in the connection region between the metal mesh 312 and the lightning receptor 311 are prevented from being fused due to a large change in the current conduction cross-sectional area in the transmission process from the metal mesh 312 to the lightning receptor 311, thereby further improving the safety performance.
In some alternative embodiments, the above embodiments provide a blade 100 having a weight per square meter of the metal mesh 312 of any value between 150g and 800g, including both 150g and 800 g. Through the arrangement, the conduction effect of the current generated by the lightning can be ensured, meanwhile, the influence on the performance of the blade 100 due to the overweight of the metal mesh 312 can be avoided, and the power generation benefit of the wind generating set is ensured.
In some optional embodiments, the weight of the metal mesh 312 per square meter is any value between 300g and 600g, so that the cost of the metal mesh 312 is moderate on the basis of ensuring the conduction effect of the current generated by lightning and avoiding the influence on the performance of the blade 100 due to the overweight of the metal mesh 312, and further ensuring that the cost of each blade 100 meets the mainstream trend of the market.
The above embodiments provide the blade 100, the grounding member 32 of which can be in various forms, as an alternative embodiment, the grounding member 32 of which can be in the form of a wire, which is simple in structure, low in cost, and capable of reliably conducting the current generated by the lightning on the conductive lightning receiving assembly 31 to the ground.
In some alternative embodiments, the blade 100 provided in the above embodiments may have the tip portion 113 being an electrical conductor and electrically connected to the grounding member 32, and the tip portion 113 being a metal block structure, such as an aluminum or copper block structure, for example, through the above arrangement, the lightning current collected at the tip portion 113 can be conducted to the ground through the grounding member 32, and the lightning protection effect of the blade 100 is further optimized.
In some alternative embodiments, each of the above embodiments provides the blade 100, the metal mesh 312 extends along the length direction Y by a predetermined distance, and a distance between an end of the metal mesh 312 near the tip portion 113 and the tip portion 113 is greater than or equal to 3 m. Since the blades 100 of the wind turbine generator set protrude from other components of the wind turbine generator set in the erected state during operation of the wind turbine generator set, the tips 113 of the blades are relatively easy to collect lightning current. By limiting the distance between one end of the metal mesh 312 close to the tip part 113 and the tip part 113 to be greater than or equal to 3m, the safety distance between the metal mesh and the tip part 113 can be ensured, so that the current generated by the tip part 113 is directly conducted to the ground through the grounding piece 32, the influence of the current generated by the tip part 113 on the conductive lightning receiving assembly 31 is reduced, and the probability of lightning damage to the blade 100 is reduced.
In some alternative embodiments, the blade 100 provided in the above embodiments has an extension of the metal mesh 312 in the length direction Y of the shell body 11, which is any value between 1/3 and 2/3 of the total length of the shell body 11, including two end values of 1/3 and 2/3. Through the arrangement, the lightning receiving capacity of the metal mesh 312 can be ensured, meanwhile, the weight and the cost of the metal mesh 312 are moderate, the overall performance of the blade 100 cannot be influenced, and the overall cost of the blade 100 can be maintained in a controllable range.
Referring to fig. 2 to 6 together, fig. 5 shows a partial cross-sectional view of a blade 100 according to an embodiment of the present invention, and fig. 6 shows a partial structural schematic view of the blade 100 according to another embodiment of the present invention. As an alternative implementation manner, the blade 100 provided in each of the above embodiments further includes an insulating member disposed in the first region 11a, so that the insulation resistance of the first region 11a is greater than that of the second region 11 b. When the blade 100 enters the lightning shock range, the insulation resistance of the first area 11a is larger than that of the second area 11b, so that the lightning can shock the second area 11b more easily, and the current generated by lightning stroke is conducted to the ground through the lightning protection device 30, even if the lightning protection device 30 is broken down, the damaged part of the blade 100 is only the local area of the shell body 11 because the functional device 20 is not arranged, and the blade is easy to maintain and low in maintenance cost.
As shown in fig. 5, in some alternative embodiments, the insulating member may include a first insulating layer 41, the first insulating layer 41 is a one-piece structure with the shell body 11, and the first insulating layer 41 is a fiberglass layer or a paint layer, and is optionally a fiberglass layer. By restricting the first insulating layer 41 from being included and restricting the structure of being integrated with the shell body 11, the insulating member is easily molded on the basis of increasing the insulation resistance of the first region 11a, and the influence on the performance of the blade 100 itself can be reduced.
As an alternative embodiment, as shown in fig. 6, the insulating member further includes a second insulating layer 42, the second insulating layer 42 is attached to the surface of the shell body 11 away from the cavity 12, and the second insulating layer 42 is a glass fiber layer or a paint layer, optionally a paint layer. By limiting the position relationship between the insulating member including the second insulating layer 42 and the housing body 11, another alternative embodiment is provided for the arrangement of the insulating member, and the requirement for increasing the insulation resistance of the first region 11a can also be satisfied. Of course, in practical implementation, the insulating member may include both the first insulating layer 41 and the second insulating layer 42, and may be specifically set according to the resistance requirement of the insulation resistor of the corresponding first region 11 a.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a blade 100 according to another embodiment of the present invention. In some alternative embodiments, the blade 100 provided in the above embodiments may include a heating deicing layer 21, and the heating deicing layer 21 is integrated with the shell body 11. Most of the abundant wind resources in China are distributed in the north of ice, snow and large-moisture mountainous areas and seasides, and the wind generating set is easy to shut down due to icing at low temperature. The heating deicing layer 21 is arranged, so that the problem can be solved, and the normal work of the wind generating set can be ensured. In some optional embodiments, the heating deicing layer 21 may be a carbon fiber layer, and the heating deicing layer 21 is heated by energization, so that the ice layer on the blade melts, and the safe and stable operation of the wind turbine generator system is ensured. The mode that adopts carbon fiber layer heating is easily the shaping, can with 11 formula structures as an organic whole of shell, stability is high, can effectively reduce wind generating set at the generated energy loss of icing period. Or, optionally, the heating deicing layer 21 may also adopt a metal heat conduction film, a metal heat conduction mesh, or the like, and similarly, the heating deicing layer 21 may be heated by electrifying, so that the ice layer on the blade melts, and the safe and stable operation of the wind turbine generator system is ensured.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a blade 100 according to another embodiment of the present invention. As an alternative, the blade 100 provided in the above embodiments may further include a main beam 22, and the main beam 22 is disposed in the cavity 12 and connected to the shell body 11. By providing the main beam 22, the strength of the entire blade 100 can be improved. In some alternative embodiments, the main beams 22 may be carbon fiber main beams, which have light weight and can ensure the strength requirement of the blade 100, so that the shell body 11 is not easy to deform. In particular, the functional device 20 may include both a heated deicing layer 21 and a main beam 22, forming the structure shown in fig. 2.
In some optional embodiments, the functional device 20 of the blade 100 provided in each of the above embodiments may further include a trailing edge auxiliary beam, which is disposed at the position of the trailing edge 112 of the shell body 11, where the area where the trailing edge auxiliary beam is located may also be referred to as the first area 11a, and by disposing the trailing edge auxiliary beam, the strength of the blade 100 may be further improved.
In some other examples, the functional device 20 of the blade 100 provided in the above embodiments may further include an aerodynamic performance enhancing device disposed on the shell body 11, and by disposing the aerodynamic performance enhancing device, the aerodynamic performance of the blade 100 may be adjusted and enhanced.
As an alternative, the above embodiments provide the blade 100, wherein the distance between the edge of the metal mesh 312 facing the trailing edge 112 and the trailing edge 112 is any value between 250mm and 800mm, including both 250mm and 800 mm. Through the arrangement, the metal mesh 312 and the trailing edge auxiliary beam, the heating deicing layer 21 and the main beam 22 which may exist in the blade 100 can respectively keep a safe insulation distance, so that the safety performance of the trailing edge auxiliary beam, the heating deicing layer 21 and the main beam 22 when the conductive lightning receiving assembly 31 generates lightning current or is broken down is ensured.
In some optional embodiments, the distance between the edge of the metal mesh 312 facing the trailing edge 112 and the trailing edge 112 is any value between 400mm and 600mm, and by the arrangement, the safe distance between the metal mesh 312 and functional devices such as the trailing edge auxiliary beam, the heating deicing layer 21 and the main beam 22 can be better balanced.
Referring to fig. 9, fig. 9 is a schematic structural view of a blade 100 according to another embodiment of the present invention. It is understood that the blade 100 provided in the foregoing embodiments is exemplified by the metal mesh 312 as an integral structure extending along the length direction Y of the shell body 11, which is an alternative implementation manner, but is not limited to the foregoing manner, in some other examples, the metal mesh 312 may include a plurality of mesh units 312a, the plurality of mesh units 312a are arranged at intervals along the length direction Y of the shell body 11, each mesh unit 312a is connected with at least one lightning receptor 311, and each lightning receptor 311 is connected with the ground connector 32, which may also meet the lightning protection requirement of the blade 100. Meanwhile, under the condition of the same weight, price and other parameters of the metal mesh 312, the metal mesh 312 adopts the structural form of a plurality of mesh units 312a, so that the span of the metal mesh 312 in the length direction Y of the shell body 11 is larger, and the lightning protection range is larger.
Accordingly, the blade 100 according to the embodiment of the present invention includes the shell 10, the functional device 20 and the lightning protection device 30, meanwhile, the shell body 11 of the outer shell 10 has a leading edge 111 and a trailing edge 112 which are oppositely distributed in the self chord direction X, and the direction from the leading edge 111 to the trailing edge 112 comprises a first region 11a and a second region 11b distributed in sequence, while the functional device 20 is defined to be located in the first area 11a, and the electrically conductive lightning receptor component 31 of the lightning protection means 30 is located in the second area 11b and is grounded via the grounding member 32, it is sufficient to conduct the current generated when the blade 100 is struck by lightning to the ground via the lightning protection means 30, meanwhile, the functional device 20 and the conductive lightning receiving assembly 31 are placed in different areas and arranged at intervals, so that the probability that the functional device 20 is damaged by lightning can be reduced, the economic loss is reduced, and the power generation benefit of the wind generating set is ensured.
And the embodiment of the utility model provides a wind generating set because of it includes the blade 100 that each above-mentioned embodiment provided, makes it have better lightning protection effect, and the maintenance cost is low, has better power generation benefit, easily uses widely.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. A blade (100), comprising:
the shell (10) comprises a shell body (11) and a cavity (12) formed by enclosing the shell body (11), wherein the shell body (11) is provided with a front edge (111) and a rear edge (112) which are oppositely distributed in the chord direction (X) of the shell body, and the shell body (11) comprises a first area (11a) and a second area (11b) which are sequentially arranged from the front edge (111) to the rear edge (112);
a functional device (20) provided in the first region (11 a);
lightning protection device (30), set up in shell (10), lightning protection device (30) including electrically conductive lightning receptor subassembly (31) and with ground connection (32) that electrically conductive lightning receptor subassembly (31) electricity is connected, electrically conductive lightning receptor subassembly (31) are located second region (11b) and with functional device (20) are spaced each other, ground connection (32) are used for ground connection.
2. Blade (100) according to claim 1, wherein the blade (100) further comprises an insulation, which is arranged in the first region (11a) such that the insulation resistance of the first region (11a) is larger than the insulation resistance of the second region (11 b).
3. Blade (100) according to claim 2, characterized in that the insulation comprises a first insulation layer (41), the first insulation layer (41) being of one-piece construction with the shell body (11), the first insulation layer (41) being a fiberglass layer or a paint layer;
and/or the insulating piece comprises a second insulating layer (42), the second insulating layer (42) is attached to the surface of the shell body (11) far away from the cavity (12), and the second insulating layer (42) is a glass fiber layer or a paint layer.
4. Blade (100) according to claim 1, wherein the minimum distance between the electrically conductive lightning receptor component (31) and the functional device (20) is equal to or greater than 100 mm.
5. Blade (100) according to claim 1, wherein the electrically conductive lightning receptor component (31) is arranged at a surface of the shell body (11) remote from the cavity (12);
the conductive lightning arrester assembly (31) comprises a lightning arrester (311) and a metal mesh (312) electrically connected with the lightning arrester (311), and the conductive lightning arrester assembly (31) is electrically connected with the grounding piece (32) through the lightning arrester (311).
6. Blade (100) according to claim 5, wherein the metal mesh (312) is a one-piece structure extending in the length direction (Y) of the shell body (11), the number of lightning receptors (311) being one;
or, the metal mesh (312) is an integrated structure extending along the length direction (Y) of the shell body (11), the number of the lightning receptors (311) is two or more, the two or more lightning receptors (311) are arranged at intervals in the length direction (Y), and each lightning receptor (311) is electrically connected with the grounding piece (32) respectively;
or, the metal net (312) comprises a plurality of net-shaped units (312a), the net-shaped units (312a) are arranged at intervals along the length direction (Y) of the shell body (11), each net-shaped unit (312a) is connected with at least one lightning receptor (311), and each lightning receptor (311) is electrically connected with the grounding piece (32) respectively.
7. Blade (100) according to claim 5, wherein the weight per square meter of the metal mesh (312) is between 150g and 800 g;
and/or, in the chord direction (X), the width of the metal mesh (312) is 100 mm-600 mm;
and/or the metal net (312) extends 1/3-2/3 of the total length of the shell body (11) in the length direction (Y) of the shell body (11).
8. Blade (100) according to claim 5, wherein the shell body (11) has a tip portion (113) and a root portion (114) in its own length direction (Y), the tip portion (113) being electrically conductive and electrically connected to the ground member (32), the metal mesh (312) extending along the length direction (Y) for a predetermined distance, the distance between one end of the metal mesh (312) close to the tip portion (113) and the tip portion (113) being equal to or greater than 3 m;
and/or the distance between the edge of the metal mesh (312) facing the trailing edge (112) and the trailing edge (112) is 250-800 mm.
9. Blade (100) according to any of claims 1 to 8, characterized in that said functional means (20) comprise a heated deicing layer (21), said heated deicing layer (21) being integral to said shell body (11);
and/or the functional device (20) further comprises a main beam (22), wherein the main beam (22) is arranged in the cavity (12) and is connected with the shell body (11);
and/or the functional device (20) further comprises a trailing edge secondary beam arranged at the trailing edge (112);
and/or the functional device (20) further comprises a pneumatic performance improving device which is arranged on the shell body (11).
10. A wind park comprising a blade (100) according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020211743.4U CN211692705U (en) | 2020-02-26 | 2020-02-26 | Blade and wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020211743.4U CN211692705U (en) | 2020-02-26 | 2020-02-26 | Blade and wind generating set |
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| Publication Number | Publication Date |
|---|---|
| CN211692705U true CN211692705U (en) | 2020-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020211743.4U Active CN211692705U (en) | 2020-02-26 | 2020-02-26 | Blade and wind generating set |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796935A (en) * | 2021-03-25 | 2021-05-14 | 中材科技风电叶片股份有限公司 | Wind power blade |
| CN115977867A (en) * | 2023-03-20 | 2023-04-18 | 新创碳谷集团有限公司 | Sectional type blade module structure and forming method thereof |
| CN115972713A (en) * | 2022-12-06 | 2023-04-18 | 国网湖南省电力有限公司 | Lightning-protection anti-icing film, wind blade and preparation method of lightning-protection anti-icing film |
| CN116292070A (en) * | 2022-11-30 | 2023-06-23 | 江苏金风科技有限公司 | Blade and wind generating set |
-
2020
- 2020-02-26 CN CN202020211743.4U patent/CN211692705U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796935A (en) * | 2021-03-25 | 2021-05-14 | 中材科技风电叶片股份有限公司 | Wind power blade |
| CN116292070A (en) * | 2022-11-30 | 2023-06-23 | 江苏金风科技有限公司 | Blade and wind generating set |
| CN115972713A (en) * | 2022-12-06 | 2023-04-18 | 国网湖南省电力有限公司 | Lightning-protection anti-icing film, wind blade and preparation method of lightning-protection anti-icing film |
| CN115977867A (en) * | 2023-03-20 | 2023-04-18 | 新创碳谷集团有限公司 | Sectional type blade module structure and forming method thereof |
| CN115977867B (en) * | 2023-03-20 | 2023-06-09 | 新创碳谷集团有限公司 | Sectional type blade module structure and forming method thereof |
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Address after: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee after: Jinfeng Technology Co.,Ltd. Address before: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee before: XINJIANG GOLDWIND SCIENCE & TECHNOLOGY Co.,Ltd. |