Blade heating de-icing device and blade electric heating de-icing system of wind turbine generator set

Abstract

The utility model provides a kind of blade heating deicing device and the blade electric heating deicing system of wind turbine generator system for online assembling wind turbine generator set blade.The blade heating deicing device includes electric heating component, which includes heating layer, protective layer and anticorrosive layer arranged in sequence, the heating layer is configured to wrap and heat the leading edge of the blade and includes electric heating film;The blade heating deicing device further includes a first thermal insulation layer, which is arranged between the leading edge of the blade and the heating layer and is configured to prevent the heat of the heating layer from entering the blade. By providing at least one layer of thermal insulation, or double thermal insulation inside and outside, the heating time is shortened, and the effect of deicing and anti-icing the blade is improved. In addition, the above-mentioned blade heating deicing device can be synchronized with the blade production process, avoiding additional costs and uncontrollable factors generated by wind farm construction, reducing the large amount of manpower cost and uncontrollable risk caused by the modification of the blade.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation, and in particular to a blade heating and de-icing device and a blade electrothermal de-icing system for wind turbine generator sets. Background Technology

[0002] my country has a vast territory, and wind resources vary significantly across regions due to geographical conditions. In cold climates, wind turbine blades often face the problem of icing. Once the ice layer on the blades accumulates to a certain thickness, it disrupts the balance between the three blades, causing a decrease in the generator's power output or even shutdown.

[0003] Blade icing can significantly increase the load on the blades, directly shortening their service life. When icing becomes severe, the blades may even break, posing a threat to the safety of wind farm workers. At the same time, icing can also significantly reduce the operating efficiency of the turbine, resulting in substantial energy loss. Utility Model Content

[0004] This disclosure provides a blade heating and de-icing device for online assembly of wind turbine blades. The blade heating and de-icing device is used to heat the leading edge of the wind turbine blade and includes an electric heating component. The electric heating component includes a heating layer, a protective layer, and an anti-corrosion layer stacked sequentially. The heating layer is positioned close to the leading edge of the blade and configured to wrap around and heat the leading edge of the blade. The heating layer includes an electric heating film. The blade heating and de-icing device also includes a first insulation layer, which is disposed between the leading edge of the blade and the heating layer and configured to prevent heat from the heating layer from entering the blade.

[0005] In at least some embodiments, the leading edge of the blade includes a blade body having a hollow structure, the blade body including an inner side facing the hollow structure and an outer side facing away from the hollow structure, the first insulation layer, heating layer, protective layer and anti-corrosion layer are all disposed on the outer side; wherein, the electric heating assembly further includes a second insulation layer, the second insulation layer being disposed on the inner side of the blade body and configured to further prevent heat from the heating layer from entering the hollow structure.

[0006] In at least some embodiments, the first insulation layer and the second insulation layer are positioned opposite each other, such that the first insulation layer and the second insulation layer overlap in the thickness direction of the blade body.

[0007] In at least some embodiments, the blade body is formed by two blade halves joined together, and the second insulation layer includes two insulation layer halves, each insulation layer halves being preset inside one blade halves.

[0008] In at least some embodiments, the number of the first insulation layer is one, the number of the second insulation layer is one or more, and the multiple second insulation layers are laid in a stacked manner on the inner side of the blade body.

[0009] In at least some embodiments, the total thickness of the second insulation layer is greater than the total thickness of the first insulation layer.

[0010] In at least some embodiments, the leading edge of the blade includes a first wing surface located on the windward side of the blade and a second wing surface located on the leeward side of the blade, the first wing surface and the second wing surface being connected to each other to define a parting line, and the first insulation layer and the second insulation layer being arranged with the parting line as the center line.

[0011] In at least some embodiments, the thickness of the first insulation layer is set to gradually decrease from the parting line toward the first wing and the second wing, respectively; and / or, the thickness of the second insulation layer is set to gradually decrease from the parting line toward the first wing and the second wing, respectively.

[0012] In at least some embodiments, the blade heating and de-icing device further includes a power supply component configured to supply power to the electric heating assembly, the power supply component including a power supply cable electrically connected to the heating layer, a portion of the power supply cable being disposed in the blade.

[0013] In at least some embodiments, the power supply cable includes a first power supply cable located in the blade and a second power supply cable located outside the blade, the second power supply cable being electrically connected to the heating layer; the first power supply cable is configured to be embedded in the web centerline of the blade and connected to the second power supply cable through a conductive structure.

[0014] In at least some embodiments, the conductive structure includes a conductive cable connector and a conductive substrate, the conductive substrate being located in the blade and connected to the first power supply cable; one end of the second power supply cable is electrically connected to the heating layer, and the other end is electrically connected to the conductive substrate through the conductive connector, the conductive connector being configured to penetrate the blade body of the blade.

[0015] This disclosure also provides a blade electrothermal de-icing system for a wind turbine generator set, including blades and the aforementioned blade heating and de-icing device.

[0016] In at least some embodiments, the blade electrothermal de-icing system of the wind turbine generator set further includes a copper-mesh-free lightning protection module, which includes a first lightning protection component disposed in the blade and a second lightning protection component disposed outside the blade.

[0017] In at least some embodiments, the blade is provided with a web, the first lightning protection component includes a down conductor embedded in the web of the blade, the down conductor extending from the blade root to the blade tip; the second lightning protection component includes a lightning conductor strip disposed outside the blade, the lightning conductor strip being disposed adjacent to the electric heating component.

[0018] In at least some embodiments, there are multiple lightning rods, which are divided into two groups. The direction from the root of the blade to the tip of the blade is defined as the first direction, and the two groups of lightning rods are close to the opposite sides of the electric heating assembly in a second direction perpendicular to the first direction. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only involve some embodiments of this utility model, and are not intended to limit this utility model.

[0020] Figure 1 This is an overall schematic diagram of the wind turbine power generation equipment provided in the embodiments of this disclosure.

[0021] Figure 2 For along Figure 1 A cross-sectional view of the blade taken by line AA.

[0022] Figure 3 This is a schematic diagram of the blade heating and de-icing device provided in an embodiment of this disclosure.

[0023] Figure 4 This is a schematic diagram of the structure of the heating layer provided in an embodiment of this disclosure.

[0024] Figure 5 Schematic diagram of another blade heating and de-icing device provided in this embodiment of the present disclosure Figure 1 .

[0025] Figure 6 Schematic diagram of another blade heating and de-icing device provided in this embodiment of the present disclosure Figure 2 .

[0026] Figure 7 This is a schematic diagram of the structure of the online assembled blade provided in an embodiment of this disclosure.

[0027] Figure 8 This is a schematic diagram of the structure near the parting line on the blade of a wind turbine generator set provided in an embodiment of this disclosure.

[0028] Figure 9 This is a schematic diagram of the internal structure of the blade according to an embodiment of the present disclosure.

[0029] Figure 10This is a schematic diagram of the structure of the second power supply cable according to an embodiment of the present disclosure.

[0030] Figure 11 This is a schematic diagram of a conductive structure connecting the first power supply cable and the second power supply cable together, according to an embodiment of this disclosure. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] This utility model provides a blade heating and de-icing device for online assembly of wind turbine blades. The blade heating and de-icing device is used to heat the leading edge of the wind turbine blade and includes an electric heating component. The electric heating component includes a heating layer, a protective layer, and an anti-corrosion layer stacked sequentially. The heating layer is positioned close to the leading edge of the blade and configured to wrap around and heat the leading edge of the blade. The heating layer includes an electric heating film. The blade heating and de-icing device also includes a first insulation layer, which is disposed between the leading edge of the blade and the heating layer and configured to prevent heat from the heating layer from entering the blade.

[0034] This utility model provides an online electrothermal de-icing system for wind turbine blades, including blades and the aforementioned blade heating and de-icing device.

[0035] The blade heating and de-icing device for online assembly of wind turbine blades provided by this utility model, by setting at least one insulation layer (i.e., a first insulation layer), can prevent heat from the heating layer from entering the blade, shorten the heating time, and improve the de-icing and anti-icing effect on the blade. Furthermore, the aforementioned blade heating and de-icing device can be laid and bonded together with the blade material, synchronously with the blade production process, avoiding additional costs and uncontrollable factors incurred during wind farm construction, and reducing the significant manpower costs and uncontrollable risks associated with blade modification.

[0036] The present disclosure will now be described through specific embodiments. To keep the following description of the embodiments of the present disclosure clear and concise, detailed descriptions of known functions and components may be omitted. When any component of an embodiment of the present disclosure appears in more than one drawing, the component may be represented by the same reference numerals in each drawing.

[0037] Figure 1 This is an overall schematic diagram of the wind turbine power generation equipment provided in the embodiments of this disclosure. Figure 2 For along Figure 1 A cross-sectional view of the blade taken by line AA. Figure 3 This is a schematic diagram of the blade heating and de-icing device provided in an embodiment of this disclosure. Figure 4 This is a schematic diagram of the structure of the heating layer provided in an embodiment of this disclosure.

[0038] like Figures 1 to 3 As shown, the blade electrothermal de-icing system 100 provided in this embodiment includes blades 10 and blade heating and de-icing devices installed online on the blades 10. Figure 1 (Not shown in the image). The blade includes a leading edge 101, and a blade heating and de-icing device is used to heat the leading edge 101 of the blade 10. Since the leading edge 101 is prone to icing, placing the blade heating and de-icing device around the leading edge of the blade can achieve both anti-icing and de-icing effects.

[0039] For example, the blade heating and de-icing device 200 includes a heating assembly 200, which includes a heating layer 202, a protective layer 204, and an anti-corrosion layer 206 stacked sequentially. The heating layer 202 is positioned near the leading edge 101 of the blade and configured to heat the leading edge 101. Figure 4 For example, the heating layer 202 includes an electric heating film 2011, which is, for example, made of graphene electric heating material. This graphene electric heating material is, for example, graphene fiber, made of graphene semiconductor material, and has advantages such as high sheet resistance, designable power density, rapid heating, low heat loss, and being a poor conductor of lightning. The blade heating and de-icing device 200 also includes a first insulation layer 208, which is disposed between the leading edge 101 of the blade and the heating layer 202 and configured to prevent heat from the heating layer 202 from entering the blade.

[0040] For example, such as Figure 2 As shown, the leading edge 101 of the blade includes a blade body 102, the blade body 102 has a hollow structure V, the blade body 102 includes an inner side 102a facing the hollow structure V and an outer side 102b facing away from the hollow structure V, and the first heat insulation layer 208, the heating layer 202, the protective layer 204 and the anti-corrosion layer 206 are all disposed on the outer side 102b.

[0041] In this embodiment of the present disclosure, by providing a heat insulation layer 208 between the leading edge 101 of the blade and the heating layer 202, the heat of the heating layer 202 can be effectively prevented from entering the interior of the blade, thereby avoiding heat loss, shortening the heating time, and improving the efficiency and effect of the blade's anti-icing and de-icing.

[0042] Figure 5 Schematic diagram of another blade heating and de-icing device provided in this embodiment of the present disclosure Figure 1 . Figure 6 Schematic diagram of another blade heating and de-icing device provided in this embodiment of the present disclosure Figure 2 .

[0043] For example, such as Figure 5 and Figure 6 As shown, the heating assembly 200 also includes a second insulation layer 210, which is disposed on the inner side 102a of the blade body 102 and configured to further prevent heat from the heating layer 202 from entering the hollow structure V. Figure 3 Compared to the blade heating and de-icing device shown, by adding a second insulation layer 210 to the inner side 102, the heat from the heating layer 202 can be further prevented from entering the blade interior, thereby further shortening the heating time and improving the anti-icing and de-icing effect of the blade.

[0044] For example, the first insulation layer 208 and the second insulation layer 210 are positioned opposite each other, such that the first insulation layer 208 and the second insulation layer 210 are aligned in the thickness direction T of the blade body 102 (e.g., ...). Figure 6 As shown, the first insulation layer 208 and the second insulation layer 210 overlap on the blade body 102. This arrangement ensures that the blade body 102 of the blade leading edge 101 is sandwiched between the first insulation layer 208 and the second insulation layer 210, effectively preventing heat from entering the hollow structure and thus avoiding the impact of heat on cables and other components within the hollow structure. For example, if the blade body 102 has a heating zone HR, the orthogonal projections of the first insulation layer 208 and the second insulation layer 210 on the blade body 102 will both fall within this heating zone HR, thereby improving the insulation effect.

[0045] For example, the area of ​​the second insulation layer 210 is set to be greater than or equal to the area of ​​the first insulation layer 208, which can enhance the insulation effect of the second insulation layer 210 and effectively prevent heat from entering the hollow structure V of the blade.

[0046] Figure 7 This is a schematic diagram of the structure of an online-assembled blade provided in an embodiment of this disclosure. During online assembly, for example, the blade body 102 is formed by joining two blade halves 1021 (also known as mold assembly). To achieve online assembly, the second insulation layer 210 includes two insulation layer halves 2101, each pre-installed on the inner side 102a of one blade half 1021. Thus, after the two blade halves 1021 are joined to form the blade body 102, the two insulation layer halves 2101 are also joined to form the second insulation layer 210. By adopting the above structural design, the insulation layer halves can be pre-laid on the inner side of the blade body before the blade mold is assembled, which is beneficial for achieving synchronous production with online blade assembly, avoiding additional costs and uncontrollable factors incurred during wind farm construction, and reducing the large manpower costs and uncontrollable risks associated with blade modification. In some embodiments, a second insulation layer 210 is laid on the inner surface of the leading edge of the blade. The molding process is not limited to being laid and cast together with the fiberglass cloth or hand-laid onto the inner side of the leading edge of the blade after the blade has cured.

[0047] For example, considering the impact of layer thickness on the aerodynamic shape of the blade, the first insulation layer 208 should not be too thick. Therefore, there is only one first insulation layer 208. There are one or more second insulation layers 210, which are stacked on the inner side 102a of the blade body 102. Since the second insulation layer does not affect the aerodynamic shape of the blade, its thickness and coverage area can be increased. By setting the second insulation layer 210 to multiple layers, the insulation effect of the second insulation layer 210 can be further improved, effectively preventing heat from entering the hollow structure V of the blade.

[0048] For example, the total thickness of the second insulation layer 210 is greater than the total thickness of the first insulation layer 208. As mentioned earlier, the first insulation layer 208 is a single layer, while the second insulation layer 210 can be multi-layered. Therefore, there are two possible configurations: 1) the first insulation layer 208 is a single layer, and the second insulation layer 210 is a single layer; 2) the first insulation layer 208 is a single layer, and the second insulation layer 210 is multi-layered. Regardless of which configuration is used, the total thickness of the second insulation layer 210 is greater than the total thickness of the first insulation layer 208, which strengthens the heat barrier against heat entering the hollow structure V.

[0049] In some embodiments, when the second insulation layer 210 and the first insulation layer 208 are single layers, the thickness of the leading edge of the blade is 10-30 mm, the thickness of the first insulation layer is 1-2 mm, and the thickness of the second insulation layer is 3-5 mm.

[0050] Figure 8 This is a schematic diagram of the structure near the mold line on the wind turbine blade provided in an embodiment of this disclosure. Figure 8 As shown, for example, the leading edge 101 of the blade includes a first airfoil 100a located on the windward side of the blade and a second airfoil 100b located on the leeward side of the blade. The first airfoil 100a and the second airfoil 100b are connected to each other to define a parting line O1O2 (the parting line is formed by...). Figure 7 The two blade halves are joined together to form the first insulation layer 208 and the second insulation layer 210, which are set with the parting line O1O2 as the center line. Figure 8 Only the first insulation layer 208 is shown in the diagram. Since the mold parting line O1O2 is prone to icing, the above-mentioned design can further improve the insulation effect of the insulation layer and further ensure good anti-icing and de-icing effects.

[0051] For example, the thickness of the first insulation layer 208 is uniform, meaning the thickness is the same everywhere, or the thickness of the first insulation layer 208 is non-uniform. In some embodiments, the thickness of the first insulation layer 208 is set to gradually decrease from the parting line O1O2 towards the first airfoil 100a and the second airfoil 100b, respectively. This prevents heat from entering the blade at the parting line O1O2, further improving the anti-icing and de-icing effect at the parting line O1O2. Similarly, the thickness of the second insulation layer 210 is uniform, meaning the thickness is the same everywhere, or the thickness of the second insulation layer 210 is non-uniform. In some embodiments, the thickness of the second insulation layer 210 is set to gradually decrease from the parting line O1O2 towards the first airfoil 100a and the second airfoil 100b, respectively. This prevents heat from further entering the hollow structure of the blade at the parting line O1O2, further improving the anti-icing and de-icing effect at the parting line O1O2.

[0052] For example, in actual production, considering that an increase in the thickness of the blade's outer surface would affect the starting shape and thus the power generation, the thickness of the first insulation layer 208 and the second insulation layer 210 should be as small as possible. Furthermore, it is preferable to set both to have the same thickness to reduce manufacturing difficulty.

[0053] In this embodiment, the first and second insulation layers are made of a material with a low thermal conductivity that can be effectively combined with fiberglass. Through thermal simulation and laboratory test results, it has been verified that the material can effectively reduce heat loss, extend the anti-icing period, and shorten the melting time after the blades are iced.

[0054] Figure 9 This is a schematic diagram of the internal structure of the blade according to an embodiment of the present disclosure; Figure 10 This is a schematic diagram of the structure of the second power transmission cable according to an embodiment of the present disclosure; Figure 11 This is a schematic diagram of a conductive structure connecting the first power supply cable and the second power supply cable together, according to an embodiment of this disclosure.

[0055] Combination Figure 4 , Figures 9 to 11 The blade heating and de-icing device also includes a power supply assembly 300 configured to supply power to the heating assembly 200. The power supply assembly 300 includes a power supply cable electrically connected to the heating layer 202, with a portion of the power supply cable disposed within the blade 10. For example, the power supply cable includes a first power supply cable 301 located within the blade 10 and a second power supply cable 302 located outside the blade 10, the second power supply cable 302 being connected to the electrodes of the heating layer 202.

[0056] See Figure 9 and Figure 11 The first power supply cable 301 is located inside the blade body 102 of the blade leading edge 100. One end of the first power supply cable 301 is connected to the main power supply cable disposed on the web 104, and the other end is electrically connected to the conductive substrate (e.g., metal substrate 402). The first power supply cable 301 can be pre-embedded in the blade 10, thereby achieving synchronous production with the online blade and avoiding the complex construction process caused by placing the first power supply cable 301 on the outside of the blade, reducing uncontrollable risks. For example, the first power supply cable 301 can be pre-embedded at the center line of the web of the blade. Since the deformation at the center line of the web is small, placing the first power supply cable at the center line of the web can avoid deformation of the first power supply cable under stress.

[0057] See Figure 4 , Figure 10 , Figure 11 The second power supply cable 302 is substantially located outside the blade body 102. The heating layer 202 includes an electric heating film 2011 and an electrode 2012, on which a copper foil 2013 is disposed, and the copper foil 2013 is connected to one end of the second power supply cable 302. The second power supply cable 302 includes a metal wire 311, an outer insulating sheath 312 wrapping the metal wire 311, and a metal ring 313 (e.g., a copper ring, commonly known as a copper lug) disposed at the other end of the second power supply cable 302. The metal ring 313 is connected to the metal wire 311. By providing the metal ring 313, it is beneficial to realize the electrical connection between the second power supply cable 302 and the first power supply cable 301.

[0058] For example, such as Figure 11As shown, the first power supply cable 301 is electrically connected to the second power supply cable 302 via a conductive structure. This conductive structure includes a conductive connector (e.g., a countersunk screw 401) and a conductive substrate (e.g., a metal substrate 402). The metal substrate 402 is located within the blade 10 and is electrically connected to the first power supply cable 301. One end of the second power supply cable 302 is electrically connected to the heating layer 202 (e.g., to the copper foil 2013 on the electrode 2012), and the other end is electrically connected to the metal substrate 402 via the countersunk screw 401, which is configured to penetrate the blade body 102 of the blade 10. This arrangement allows for the pre-installation of some power supply cables within the blade 10 (i.e., installation before blade mold closing), enabling synchronous production with the online blade production. This avoids the complex construction process caused by placing the first power supply cable 301 on the outside of the blade and reduces uncontrollable risks.

[0059] like Figure 8 As shown, for example, the blade electrothermal de-icing system 100 also includes a copper-mesh-less lightning protection module, which is suitable for situations where traditional copper mesh lightning protection is not feasible. For example, the copper-mesh-less lightning protection module includes a first lightning protection component disposed within the blade 10 and a second lightning protection component disposed outside the blade 10. For example, the blade 10 has a web 104, and the first lightning protection component includes a down conductor 404 pre-embedded in the web 104 of the blade 10, extending from the blade root 10A to the blade tip 10B. The second lightning protection component includes a lightning conductor 404 disposed outside the blade 10, positioned adjacent to the heating component 200 to provide lightning protection for the heating component 200. For example, the lightning conductor 404 is laid starting from the heating component 200 closest to the blade root and extending to the blade tip.

[0060] For example, there are multiple mine-conducting strips 404, and these multiple mine-conducting strips 404 can be divided into two groups (e.g.) Figure 8 As shown, the direction from the blade root 10A to the blade tip 10B of the blade 10 is defined as the first direction D1. Two sets of lightning conductors 404 are positioned close to opposite sides of the heating assembly 200 in a second direction D2 perpendicular to the first direction D1. This improves the lightning protection effect. The lightning conductors 404 are, for example, gold-plated copper strips, installed around the electrothermal film according to the aerodynamic shape of the blade, receiving lightning strikes and transmitting them to the ground through down conductors.

[0061] For example, the lightning protection module also includes a surge protector (not shown), a charge suppressor 405, and a lightning arrester 406. The surge protector is connected in parallel to the power supply cable at the blade root, protecting the power supply from lightning strikes when current flows through the cable. The charge suppressor 405 is connected to the down conductor 404 at the blade root, reducing charge emission from the lightning conductor, cable, and lightning arrester. The lightning arrester 406 can utilize the original blade tip lightning arrester to connect the lightning conductor 404 to the down conductor 403.

[0062] For example, the blade electrothermal de-icing system 100 also includes a sensing device and a control device, which can be installed inside or outside the wind turbine generator blades. For example, the sensing device can be an icing sensor or a temperature and humidity sensor. When icing and melting of the blades are detected, information is sent to the control module. The control module is a module independent of the main control system of the wind turbine generator set, which instructs the power supply system of the electric heating film for blade electrothermal de-icing to start and stop.

[0063] In this embodiment, electrode 2012 is, for example, a plasma electrode that contacts the graphene fiber, serving as a connection carrier between the power transmission cable and the graphene fiber electrical signal. The protective layer is made of insulating fiberglass cloth, acting as a protective material to isolate the graphene heating system from the external environment and prevent current breakdown. The anti-corrosion layer is made of polyurethane material to prevent wind and rain erosion from corroding and damaging the electric heating film.

[0064] This utility model is a further improvement based on Chinese Patent Application No. 202420062541.6, mainly involving the following aspects: 1) This application involves the installation of cables, wiring, and electric heating films during the online state, i.e., the blade production process, utilizing the state before the blade is delivered. 2) Further thermal simulation verification shows that, without changing the main structure of the original electric heating film, the flame-retardant layer is removed and replaced with a double-layer insulation layer laid on the inner and outer surfaces of the blade's leading edge, effectively reducing heat loss, improving anti-icing and de-icing effects, and saving energy. In addition, the double-layer insulation layer corresponds to the placement position of the electric heating film and wraps the bottom layer of the leading edge of the blade surface with the electric heating film, which can improve thermal efficiency and shorten the de-icing heating time. 3) The design and installation of the power supply cable inside the blade in the online system, through the pre-embedded cable and the structure of connecting the plastic-encapsulated conductive substrate with the electric heating film, avoids the influence of external devices on the aerodynamic shape of the blade, and avoids in-service construction deviations and high-altitude operation risks. 4) For certain types of long and flexible blades that cannot be protected by copper mesh lightning protection, lightning protection components are installed on the inner and outer sides of the blades, and a down conductor connected to a charge suppressor is installed to connect to a lightning rod, so that the lightning received by the lightning rod is transmitted to the ground.

[0065] The following points need to be clarified in this article: (1) The accompanying drawings of the embodiments of this application only involve the structures involved in the embodiments of this application. Other structures can be referred to the general design.

[0066] (2) Where there is no conflict, features of the same embodiment and different embodiments of this application may be combined with each other.

[0067] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A blade heating de-icing device for in-line assembly of a wind turbine blade, characterized in that, The blade heating and de-icing device is used to heat the leading edge of the wind turbine blade and includes an electric heating component. The electric heating component includes a heating layer, a protective layer and an anti-corrosion layer stacked in sequence. The heating layer is positioned close to the leading edge of the blade and is configured to wrap around and heat the leading edge of the blade. The heating layer includes an electric heating film. The blade heating and de-icing device further includes a first insulation layer, which is disposed between the leading edge of the blade and the heating layer and configured to prevent heat from the heating layer from entering the blade.

2. The vane heating de-icing device according to claim 1, characterized in that The leading edge of the blade includes a blade body, the blade body has a hollow structure, the blade body includes an inner side facing the hollow structure and an outer side facing away from the hollow structure, and the first heat insulation layer, heating layer, protective layer and anti-corrosion layer are all disposed on the outer side; The electric heating assembly further includes a second insulation layer, which is disposed on the inner side of the blade body and configured to further prevent heat from the heating layer from entering the hollow structure.

3. The vane heating de-icing device according to claim 2, characterized in that The first insulation layer and the second insulation layer are positioned opposite each other, such that the first insulation layer and the second insulation layer overlap in the thickness direction of the blade body.

4. The vane heating de-icing device according to claim 3, characterized in that The blade body is formed by two blade halves joined together, and the second insulation layer includes two insulation layer halves, each insulation layer halves being pre-set inside one blade halves.

5. The vane heating de-icing device according to claim 3, characterized in that The first insulation layer is one, and the second insulation layer is one or more, with multiple second insulation layers laid in a stacked manner on the inner side of the blade body.

6. The vane heating de-icing device according to claim 5, characterized in that The total thickness of the second insulation layer is greater than the total thickness of the first insulation layer.

7. The vane heating de-icing device according to claim 5, characterized in that The leading edge of the blade includes a first wing surface located on the windward side of the blade and a second wing surface located on the leeward side of the blade. The first wing surface and the second wing surface are connected to each other to define a parting line. The first insulation layer and the second insulation layer are arranged with the parting line as the center line.

8. The blade heating and de-icing device according to claim 7, characterized in that, The thickness of the first insulation layer is set to gradually decrease from the parting line toward the first wing surface and the second wing surface, respectively; and / or, The thickness of the second insulation layer is set to gradually decrease from the parting line towards the first wing surface and the second wing surface, respectively.

9. The vane heating de-icing device according to claim 1, characterized in that The blade heating and de-icing device further includes a power supply component configured to supply power to the electric heating assembly. The power supply component includes a power supply cable electrically connected to the heating layer, and a portion of the power supply cable is disposed in the blade.

10. The blade heating and de-icing device according to claim 9, characterized in that, The power supply cable includes a first power supply cable located in the blade and a second power supply cable located outside the blade, the second power supply cable being electrically connected to the heating layer; The first power supply cable is configured to be embedded in the center line of the web of the blade and is electrically connected to the second power supply cable through a conductive structure.

11. The blade heating and de-icing device according to claim 10, wherein, The conductive structure includes a conductive connector and a conductive substrate. The conductive substrate is located in the blade and is electrically connected to the first power supply cable; One end of the second power supply cable is electrically connected to the heating layer, and the other end is electrically connected to the conductive substrate through the conductive connector, wherein the conductive connector is configured to penetrate the blade body of the blade.

12. A blade electro-thermal de-icing system for a wind turbine generator system, characterized in that, Includes blades and the blade heating and de-icing device according to any one of claims 1 to 11.

13. The vane electrothermal de-icing system of claim 12, wherein, The blade electrothermal de-icing system also includes a copper-mesh-free lightning protection module, which includes a first lightning protection component disposed in the blade and a second lightning protection component disposed outside the blade.

14. The vane electrothermal de-icing system of claim 13, wherein, The blade is provided with a web. The first lightning protection component includes a down conductor embedded in the web of the blade, the down conductor extending from the root of the blade to the tip of the blade; The second lightning protection component includes a lightning guide bar disposed outside the blade, the lightning guide bar being positioned adjacent to the electric heating component.

15. The vane electrothermal de-icing system of claim 14, wherein, The number of lightning guide strips is multiple, and the multiple lightning guide strips are divided into two groups. The direction from the root of the blade to the tip of the blade is defined as the first direction. The two groups of lightning guide strips are close to the opposite sides of the electric heating assembly in a second direction perpendicular to the first direction.

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