Blade deicing device, heating body, blade and wind generating set

Abstract

The invention relates to a blade deicing device, a heating body, a blade and a wind generating set, the blade deicing device is used on a shell of the blade, the shell comprises a first area and a second area, the deicing device comprises the heating body and an electric conductor, and the heating body comprises a first heating section and a second heating section which are arranged at an interval; the first heating section is arranged in the first area, the second heating section is arranged in the second area, the first heating section and the second heating section are connected in series, and the heating body is configured to provide heat for the shell; the electric conductor comprises a first wire and a second wire, the first wire is connected with one of the first heating section and the second heating section, the second wire is connected with the other one of the first heating section and the second heating section, current is input to the heating body through the first wire, and current is output through the second wire. According to the blade deicing device, multiple positions of the blade shell can be heated and deiced at the same time, the blade deicing capacity is improved, and blade deicing is more sufficient.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly to a blade de-icing device, a heating element, a blade and a wind turbine generator set. Background Art

[0002] In freezing rain and extremely low temperature regions, after the surface of the blades of a wind turbine generator set freezes, the aerodynamic shape is changed, the aerodynamic efficiency is reduced, and thus the power generation is lost. Therefore, it is often necessary to heat the blades to achieve the purpose of de-icing.

[0003] However, icing often occurs simultaneously at multiple different positions on the surface of the blade housing, and the positions of icing have a high degree of randomness. When only a part of the blade housing is heated, it is often impossible to de-ice multiple areas of the blade, resulting in an insufficient de-icing process for the blade and a poor de-icing effect. Summary of the Invention

[0004] Embodiments of the present invention provide a blade de-icing device, a heating element, a blade and a wind turbine generator set, which can simultaneously heat and de-ice multiple positions of the blade housing, improve the de-icing ability of the blade, and make the de-icing of the blade more sufficient.

[0005] In a first aspect, according to an embodiment of the present invention, a blade de-icing device is proposed for a housing of a blade. The housing includes a first region and a second region. The de-icing device includes a heating element and a conductor. The heating element includes a first heating section and a second heating section arranged at intervals. The first heating section is arranged in the first region and the second heating section is arranged in the second region. The first heating section and the second heating section are connected in series through a conductor. The heating element is configured to provide heat to the housing. The conductor includes a first wire and a second wire. The first wire is connected to one of the first heating section and the second heating section, and the second wire is connected to the other. Current is input to the heating element through the first wire and output through the second wire.

[0006] According to an aspect of an embodiment of the present invention, the first region includes a windward region and the second region includes a leeward region.

[0007] According to an aspect of an embodiment of the present invention, the heat power density of the first heating section is greater than the heat power density of the second heating section.

[0008] According to an aspect of an embodiment of the present invention, the first heating section and / or the second heating section includes a prefabricated structure. The prefabricated structure includes a heating part and a protection part arranged in a stacked manner. The protection part covers the heating part, and heat is provided to the housing through the heating part.

[0009] According to one aspect of an embodiment of the present invention, the first heating section and the second heating section include resistance wires, and the number of resistance wires per unit area of the first heating section is greater than that of the second heating section.

[0010] According to one aspect of an embodiment of the present invention, the first heating section and the second heating section include resistance wires, and the heat power of the resistance wires per unit area of the first heating section is greater than that of the second heating section.

[0011] According to one aspect of an embodiment of the present invention, the first heating section and / or the second heating section includes a plurality of heating segments, and the plurality of heating segments are connected in series through conductors.

[0012] According to one aspect of an embodiment of the present invention, the plurality of heating segments are arranged at intervals along the length direction of the blade, and in the direction from the blade root to the blade tip, the heat power density of the plurality of heating segments gradually increases.

[0013] According to one aspect of an embodiment of the present invention, the deicing device includes a plurality of heating elements, and the plurality of heating elements are connected in parallel.

[0014] According to one aspect of an embodiment of the present invention, the first wiring includes a first main path and a plurality of first branch paths, the second wiring includes a second main path and a plurality of second branch paths, one end of any heating element is connected to a first branch path and the other end is connected to a second branch path, and the plurality of first branch paths converge to the first main path and the plurality of second branch paths converge to the second main path.

[0015] According to one aspect of an embodiment of the present invention, the plurality of heating elements are arranged at intervals along the length direction of the blade, and in the direction from the blade root to the blade tip, the heat power density of the plurality of heating elements gradually increases.

[0016] According to one aspect of an embodiment of the present invention, connection ends are provided at the respective ends of the first heating section and the second heating section, the connection ends protrude from the corresponding ends, and the first wiring and the second wiring are connected to the first heating section and the second heating section through the connection ends.

[0017] In a second aspect, according to an embodiment of the present invention, a heating element is provided for heating a housing of a blade, the housing includes a first region and a second region, the first region includes a windward region and the second region includes a leeward region, and the heating element includes: a first heating section (and a second heating section) arranged at intervals, the first heating section is arranged in the first region and the second heating section is arranged in the second region, and the heat power density of the first heating section is greater than that of the second heating section.

[0018] According to one aspect of an embodiment of the present invention, the first heating section and / or the second heating section includes a plurality of heating segments, and the plurality of heating segments are connected in series through conductors.

[0019] According to one aspect of the embodiments of the present invention, the first heating section and / or the second heating section include a plurality of heating segments, the plurality of heating segments are arranged at intervals along the length direction of the blade, and in the direction from the blade root to the blade tip, the thermal power density of the plurality of heating segments gradually increases.

[0020] According to one aspect of the embodiments of the present invention, the first heating section and / or the second heating section include a prefabricated structure, the prefabricated structure includes a heating part and a protection part arranged in a stacked manner, the protection part covers the heating part, and heat is provided to the housing through the heating part.

[0021] According to one aspect of the embodiments of the present invention, the heating part includes resistance wires, and the number of resistance wires in the first heating section is greater than the number of resistance wires in the second heating section.

[0022] According to one aspect of the embodiments of the present invention, the heating part includes resistance wires, and the thermal power of the resistance wires in the first heating section is greater than the thermal power of the resistance wires in the second heating section.

[0023] In a third aspect, according to an embodiment of the present invention, a blade is provided, including the de-icing device as described above.

[0024] According to an embodiment of the present invention, a blade is provided, including the heating body as described above.

[0025] In a fourth aspect, according to an embodiment of the present invention, a wind turbine generator set is provided, including the blade as described above.

[0026] The embodiments of the present invention provide a blade de-icing device, a heating body, a blade and a wind turbine generator set. By using the heating body in the de-icing device to heat the housing of the blade, and dividing the heating body into a first heating section and a second heating section connected in series to respectively heat the first area and the second area of the housing, and using the first wire and the second wire in the conductor to connect with the heating body to form a current loop, thereby realizing simultaneous electric heating and de-icing of different areas of the blade housing, increasing the de-icing area of the blade housing, improving the overall de-icing ability, making the de-icing of the blade more sufficient, avoiding the phenomenon of uneven de-icing positions, and thus having a better de-icing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The features, advantages and technical effects of the exemplary embodiments of the present invention will be described below with reference to the drawings.

[0028] Figure 1 is a schematic structural diagram of the de-icing device in the blade according to the embodiment of the present invention;

[0029] Figure 2 is a schematic structural diagram of a de-icing device according to an embodiment of the present invention;

[0030] Figure 3 isFigure 1 Schematic cross-sectional view of N-N therein;

[0031] Figure 4 is Figure 3 Partial enlarged schematic view at location A in

[0032] Figure 5 Schematic structural view of another de-icing device according to an embodiment of the present invention;

[0033] Figure 6 Schematic structural view of yet another de-icing device according to an embodiment of the present invention;

[0034] Figure 7 Schematic structural view of yet another de-icing device according to an embodiment of the present invention.

[0035] Reference numerals:

[0036] 10 - housing; 11 - first region; 12 - second region; 13 - blade root; 14 - blade tip;

[0037] 20 - heating element; 21 - first heating section; 22 - second heating section; 23 - heating segment;

[0038] 1 - heating part; 2 - protection part; 3 - connection end;

[0039] 30 - conductor; 31 - first wire path; 32 - second wire path; 31a - first main path; 31b - first branch path; 32a - second main path; 32b - second branch path.

[0040] In the drawings, like parts are denoted by like reference numerals. The drawings are not drawn to actual scale. Detailed Description of the Invention

[0041] The 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. However, it will be apparent to those 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 provided to better understand the present invention by way of illustrating examples of the present invention. In the drawings and the following description, at least some of the well-known structures and technologies are not shown in order to avoid unnecessarily obscuring the present invention; and, for clarity, the dimensions of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0042] The orientation terms used in the following description are all the directions shown in the figures, and do not limit the specific structures of the blade de-icing device, heating element, blade, and wind turbine generator of the present invention. In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] To better understand the present invention, the following Figures 1 to 7 will describe in detail the blade de-icing device, heating element, blade, and wind turbine generator according to the embodiments of the present invention.

[0044] Please refer to Figures 1 to 3 , according to an embodiment of the present invention, a blade de-icing device is proposed, which is used on the housing 10 of the blade. The housing 10 includes a first area 11 and a second area 12. The de-icing device includes a heating element 20 and a conductor 30. The heating element 20 includes a first heating section 21 and a second heating section 22 arranged at intervals. The first heating section 21 is arranged in the first area 11 and the second heating section 22 is arranged in the second area 12. The first heating section 21 and the second heating section 22 are connected in series through a conductor. The heating element 20 is configured to provide heat to the housing 10; the conductor 30 includes a first wire 31 and a second wire 32. The first wire 31 is connected to one of the first heating section 21 and the second heating section 22, and the second wire 32 is connected to the other. Current is input to the heating element 20 through the first wire 31 and output through the second wire 32.

[0045] To remove the ice on the surface of the blade housing 10, in this embodiment, a de-icing device is provided, which provides heat to the housing 10 through the principle of electric heating, thereby melting the ice to achieve the purpose of de-icing.

[0046] Optionally, in this embodiment, the first heating section 21 and the second heating section 22 in the heating element 20 are respectively used to de-ice two areas, thereby realizing simultaneous de-icing of different areas of the housing 10.

[0047] Optionally, the heating element 20 and the conductor 30 in the de-icing device can be set as a prefabricated structure, so that after the heating element 20 and the conductor 30 are respectively independently formed, they can be laid on the housing 10.

[0048] For the de-icing device disposed on the upper surface of the housing 10, it can be disposed on the inner surface or the outer surface of the housing 10. When the heating element 20 is disposed on the outer surface, it can directly perform electric heating on the outer surface, thereby directly providing heat to the outer surface; when the heating element 20 is disposed on the inner surface, de-icing is performed by conducting heat to the outer surface.

[0049] Of course, the de-icing device in this embodiment can also be integrated into the housing 10 during the injection molding process of the blade housing 10, and integrally formed with the blade housing 10, and can achieve simultaneous heating of different regions of the housing 10.

[0050] In order to ensure that the first heating section 21 and the second heating section 22 in the heating element 20 simultaneously heat the first region 11 and the second region 12, it is necessary to connect them in series. Considering that a short circuit phenomenon will occur after the two heating sections are in direct contact, it is necessary to space them apart, and simultaneous electric heating of different regions is achieved through series connection.

[0051] Regarding the specific structure of the conductor 30, it has a first wire 31 and a second wire 32. The two wires are respectively connected between the heating element 20 and the power supply. The current flow direction of the first wire 31 is from the power supply to the heating element 20, and the second wire 32 conducts the current back to the power supply as a return path. Thus, the heating element 20 and the conductor 30 in the de-icing device together with the power supply form a closed loop. Optionally, the power supply can be disposed at the blade root 13 position of the blade, which is convenient for lead connection.

[0052] The embodiment of the present invention provides a blade de-icing device. By using the heating element 20 in the de-icing device to heat the housing 10 of the blade, and dividing the heating element 20 into a first heating section 21 and a second heating section 22 connected in series to respectively heat the first region 11 and the second region 12 of the housing 10, and using the first wire 31 and the second wire 32 in the conductor 30 to connect with the heating element 20 to form a current loop, simultaneous electric heating de-icing of different regions of the blade housing 10 is achieved, the de-icing area of the blade housing 10 is increased, the overall de-icing ability is improved, the de-icing of the blade is made more sufficient, so that a better de-icing effect is obtained, and the circuit is simple, easy to operate, which is beneficial to the installation of the de-icing device.

[0053] As an alternative embodiment, the first region 11 includes the windward region and the second region 12 includes the leeward region, and the heat power density of the first heating section 21 is greater than the heat power density of the second heating section 22.

[0054] Optionally, the first heating section 21 can be disposed on the windward surface of the housing 10 and the second heating section 22 can be disposed on the leeward surface of the housing 10, so that the heating element 20 can simultaneously heat and de-ice the windward surface and the leeward surface.

[0055] Since the windward area is more affected by wind force than the leeward area, icing is more likely to occur in the windward area. Therefore, in this embodiment, by controlling the difference in the heat power density between the first heating section 21 and the second heating section 22, the heat power density of the first heating section 21 is greater than that of the second heating section 22, thereby achieving more effective de-icing of the windward area.

[0056] Among them, the heat power density refers to the heat work done by the heating section per unit area per unit time. The heat power density of the first heating section 21 is greater than that of the second heating section 22. That is to say, compared with the leeward area, more heat needs to be provided to the windward area per unit time and per unit area, which is beneficial to the de-icing of the windward area.

[0057] As an alternative embodiment, please refer to Figure 4 , the first heating section 21 and / or the second heating section 22 includes a prefabricated structure. The prefabricated structure includes a heating part 1 and a protection part 2 arranged in a stacked manner. The protection part 2 covers the heating part 1, and the heating part 1 provides heat to the housing 10.

[0058] Optionally, the two heating sections provided in this embodiment are respectively prefabricated structures, that is, they are formed as two independent individuals together with the housing 10. The prefabricated structure is mainly formed by laminating the heating part 1 and the protection part 2. The heating part 1 provides heat to the housing 10, and the protection part 2 covers the heating part 1 to provide isolation protection for it.

[0059] Optionally, the heating part 1 can adopt a carbon fiber resistance wire, and the protection part 2 can adopt a glass cloth structure. When the two heating sections are arranged on the blade housing 10, they can be attached to the surface of the housing 10 by means of bonding.

[0060] The embodiment of the present invention provides a blade de-icing device. By setting the two heating sections as prefabricated structures, it is convenient for the process forming of the heating sections, has a more simplified preparation process, and at the same time has higher flexibility and convenience in the connection process with the housing 10. And being set in the form of prefabricated parts can upgrade the de-icing of in-service blades in the air, and at the same time, it is easier to repair and replace the de-icing device after being struck by lightning.

[0061] As an alternative embodiment, the first heating section 21 and the second heating section 2 include resistance wires, and the number of resistance wires per unit area of the first heating section 21 is greater than that of the second heating section 22.

[0062] When it is necessary to satisfy that the heat power density of the first heating section 21 is greater than that of the second heating section 22, in this case, when the areas of the first heating section 21 and the second heating section 22 are equal, the heat power density can be controlled by controlling the number of regulating resistance wires, and it is achieved by the number of resistance wires in the first heating section 21 being greater than that in the second heating section 22.

[0063] Optionally, the heating part 1 includes resistance wires, and the heat power of the resistance wires per unit area of the first heating section 21 is greater than that of the second heating section 22.

[0064] The embodiment of the present invention provides a blade de-icing device. By setting the heating part 1 in the form of resistance wires, it is beneficial to realize the difference in heat power density of different heating sections by controlling the number or heat power of the resistance wires, and the structure is simple and easy to adjust.

[0065] As an optional embodiment, please refer to Figure 5 , the first heating section 21 and / or the second heating section 22 include a plurality of heating sub-sections 23, and the plurality of heating sub-sections 23 are connected in series through conductors.

[0066] Furthermore, the first heating section 21 and the second heating section 22 are respectively divided into a plurality of heating sub-sections 23 and are connected in series with each other, so as to be able to heat each sub-region in the first region 11 and the second region 12 more pertinently.

[0067] In the present invention, there is no special limitation on the number of heating sub-sections 23 specifically divided in the first heating section 21 and the second heating section 22, as long as it can ensure that the heating sub-sections 23 are connected in series to provide heat for each sub-region.

[0068] At the same time, in the present invention, there is no special limitation on the specific arrangement manner of the divided plurality of heating sub-sections 23. The formed plurality of heating sub-sections 23 can be arranged at the corresponding de-icing positions according to different actual de-icing requirements to realize heating and de-icing of multiple sub-regions.

[0069] Optionally, the heat power density of the heating sub-section 23 can be designed according to the de-icing requirements of different regions of the blade.

[0070] The embodiment of the present invention provides a blade de-icing device. By dividing the heating section into a plurality of heating sub-sections 23, heat support is provided for multiple sub-regions in the first region 11 and the second region 12, so as to realize more targeted de-icing of different icing locations. Due to the trend of increasing unit size, the blades are getting longer and longer. By dividing the larger-area heating section into smaller-area heating sub-sections 23 for preparation, it is beneficial to the process forming and convenient to complete the process preparation.

[0071] As an alternative embodiment, a plurality of heating segments 23 are arranged at intervals along the length direction of the blade, and in the direction from the blade root 13 to the blade tip 14, the heat power density of the plurality of heating segments 23 gradually increases.

[0072] Among them, the formed plurality of heating segments 23 can be arranged along the length direction of the blade. As a whole, they are arranged in the direction from the blade root 13 to the blade tip 14 and are connected in series through conductors.

[0073] Considering the actual air flow law during the rotation of the blade, the wind force acting on the blade tip 14 position is more obvious than that on the blade root 13 position, so it is easier to ice. By arranging heating segments 23 with different heat power densities along the length direction of the blade, it is more conducive to targeted de-icing.

[0074] Specifically, the heating segment 23 closer to the blade tip 14 has a higher heat power density than the heating segment 23 closer to the blade root 13. The overall arrangement rule is that in the direction from the blade root 13 to the blade tip 14, the heat power density of the plurality of heating segments 23 gradually increases, showing a gradual change trend, so as to better meet the actual icing environment on the blade.

[0075] In this way, compared with the blade root 13 side, the heating segment 23 closer to the blade tip 14 can provide more heat to the housing 10 per unit time, so as to adapt to the actual working condition that it is easier to ice at the blade tip 14 and form a better de-icing effect on the blade tip 14.

[0076] Optionally, when the heating section adopts a prefabricated structure, each heating segment 23 at this time is also bonded to the surface of the housing 10 as a prefabricated structure. When reflecting the difference in the heat power density of each heating segment 23, the difference can be specifically realized by adjusting the number of resistance wires per unit area and / or the heat power of the resistance wires per unit area in each heating segment 23, that is, the number of resistance wires per unit area and / or the heat power of the resistance wires per unit area in the heating segment 23 closer to the blade tip 14 is greater than that in the heating segment 23 closer to the blade root 13.

[0077] The embodiment of the present invention provides a blade de-icing device. By arranging a plurality of heating segments 23 along the length direction of the blade, sufficient de-icing is carried out at this position. At the same time, by controlling and adjusting the difference in the heat power density of each heating segment 23 in this direction, more heat is provided to the blade tip 14 position compared with the blade root 13 position, so as to adapt to the actual icing law of the blade and more targeted de-ice the blade tip 14 and blade root 13 positions.

[0078] As an alternative embodiment, please refer to Figure 6 , the de-icing device includes a plurality of heating bodies 20, and the plurality of heating bodies 20 are connected in parallel.

[0079] Optionally, in this embodiment, a plurality of heating bodies 20 are provided in the deicing device, and the plurality of heating bodies 20 are connected in parallel, so that the deicing area can be further increased, and more areas on the surface of the shell 10 can be deiced simultaneously.

[0080] In this embodiment, there is no special limitation on the number of heating bodies 20 provided, and they can be covered and set according to the actual deicing area requirements. There is no special limitation on the relative position relationship between the heating bodies 20, and they can be set according to the actual deicing positions to meet the parallel connection between the heating bodies 20 and form electric heating.

[0081] An embodiment of the present invention provides a blade deicing device. By arranging multiple heating bodies 20 in the deicing device and arranging them in parallel, the coverage range of the heating bodies 20 is increased, and the deicing area of ​​the deicing device is further increased. It is possible to achieve simultaneous heating and deicing of multiple different areas, and deicing of required areas is more targeted. It has a higher deicing ability and improves the overall deicing effect.

[0082] As an alternative embodiment, see Figure 6 The first route 31 includes a first trunk 31a and multiple first branches 31b, the second route 32 includes a second trunk 32a and multiple second branches 32b, one end of any heating body 20 is connected to a first branch 31b and the other end is connected to a second branch 32b, multiple first branches 31b converge to the first trunk 31a and multiple second branches 32b converge to the second trunk 32a.

[0083] In the structure with multiple heaters 20 connected in parallel, for the specific structure of the conductor 30, the first line 31 is divided into a first trunk 31a and multiple first branches 31b, and the second line 32 is divided into a second trunk 32a and multiple second branches 32b.

[0084] Any one of the first branches 31b is connected to one end of the heating body 20, so that the first branch 31b provides current to the heating body 20, and any one of the second branches 32b is connected to the other end of the heating body 20, so that the second branch 32b outputs current. In this way, multiple first branches 31b converge and are connected to the first main road 31a, and multiple second branches 32b converge and are connected to the second main road 32a. The first main road 31a provides current to multiple first branches 31b respectively, and the current is divided at the multiple first branches 31b and corresponds to each heating body 20. At the same time, the current flowing out of multiple heating bodies 20 is converged into the second main road 32a through the corresponding second branches 32b for transmission.

[0085] An embodiment of the present invention provides a blade de-icing device. By dividing the wire routing into a main path and a branched path connection method, the parallel connection of multiple heating elements 20 is achieved, which is beneficial to complete the transmission of the parallel circuit and provides a guarantee for further increasing the coverage area of the heating elements 20.

[0086] As an optional embodiment, multiple heating elements 20 are arranged at intervals along the length direction of the blade. In the direction from the blade root 13 to the blade tip 14, the thermal power density of the multiple heating elements 20 gradually increases.

[0087] Optionally, while paralleling multiple heating elements 20, the multiple heating elements 20 are arranged along the length direction of the blade. As described above, different icing conditions exist at the blade tip 14 and the blade root 13 of the blade. Based on the parallel structure, it is necessary to differentially design the thermal power density of the heating elements 20 therein.

[0088] From the above analysis, it can be seen that it is necessary to make the thermal power density of the heating element 20 at the blade tip 14 greater than the thermal power density of the heating element 20 at the blade root 13. Therefore, in the parallel structure, in the direction from the blade root 13 to the blade tip 14, the thermal power density of the heating element 20 shows an increasing trend.

[0089] Optionally, when the heating element 20 adopts a prefabricated structure, the thermal power density can also be adjusted by controlling the number of resistance wires therein. More resistance wires are arranged in the heating element 20 near the blade tip 14 to reflect the structural difference.

[0090] An embodiment of the present invention provides a blade de-icing device. By arranging multiple heating elements 20 in parallel along the length direction of the blade, while increasing the de-icing area of the blade surface, the thermal power density of the heating element 20 on the side facing the blade tip 14 gradually increases, thus adapting to the actual icing conditions of the blade and more specifically de-icing different positions of the blade to ensure the de-icing effect at each position.

[0091] As an optional embodiment, please refer to Figure 7 , connection ends 3 are provided at the respective ends of the first heating section 21 and the second heating section 22. The connection ends 3 protrude from the corresponding ends. The first wire routing 31 and the second wire routing 32 are connected to the first heating section 21 and the second heating section 22 through the connection ends 3.

[0092] To ensure the reliability of the connection between the heating sections, connection ends 3 can be provided at the ends of each heating section. Optionally, the connection ends 3 can be made of a metal conductor. The connection ends 3 protrude from the ends on the heating sections. Each heating section is connected to the first wire routing 31 and the second wire routing 32 through the connection ends 3.

[0093] An embodiment of the present invention provides a blade de-icing device. By providing a connection end 3 at the end of the heating section and using the connection end 3 to form a connection with the wire routing, the stability of the electrical connection between the two is improved, facilitating the connection between the heating body 20 and the conductor 30.

[0094] According to an embodiment of the present invention, a heating body 20 is provided for heating the housing 10 of the blade. The housing 10 includes a first region 11 and a second region 12. The first region 11 includes the windward region, and the second region 12 includes the leeward region. The heating body 20 includes a first heating section 21 and a second heating section 22 arranged at intervals. The first heating section 21 is arranged in the first region 11 and the second heating section 22 is arranged in the second region 12. The thermal power density of the first heating section 21 is greater than that of the second heating section 22.

[0095] Since the windward region is more affected by wind force than the leeward region and icing is more likely to occur in the windward region, in this embodiment, by controlling the difference in thermal power density between the first heating section 21 and the second heating section 22, the thermal power density of the first heating section 21 is made greater than that of the second heating section 22, thereby achieving more effective de-icing of the windward region.

[0096] As an optional embodiment, please refer to Figure 5 , the first heating section 21 and / or the second heating section 22 include a plurality of heating segments 23, and the plurality of heating segments 23 are connected in series through a conductor.

[0097] Furthermore, the first heating section 21 and the second heating section 22 are respectively divided into a plurality of heating segments 23 and connected in series through a conductor, so as to be able to heat each sub-region in the first region 11 and the second region 12 more pertinently.

[0098] In the present invention, there is no special limitation on the number of heating segments 23 specifically divided in the first heating section 21 and the second heating section 22, as long as it can ensure that the heating segments 23 are connected in series to provide heat for each sub-region.

[0099] At the same time, in the present invention, there is no special limitation on the specific arrangement manner of the divided plurality of heating segments 23. The formed plurality of heating segments 23 can be arranged at the corresponding de-icing positions according to different actual de-icing requirements to achieve heating and de-icing of multiple sub-regions.

[0100] Optionally, the thermal power density of the heating segment 23 can be designed according to the de-icing requirements of different regions of the blade.

[0101] An embodiment of the present invention provides a blade de-icing device. By dividing the heating section into multiple heating segments 23, heat support is provided for multiple sub-regions in the first region 11 and the second region 12, thereby achieving more targeted de-icing at different icing locations. Due to the trend of increasing unit size, the blades are getting longer. By dividing a larger-area heating section into smaller-area heating segments 23 for preparation, it is beneficial for process forming and facilitates the completion of process preparation.

[0102] As an alternative embodiment, the first heating section 21 and / or the second heating section 22 include multiple heating segments 23, and the multiple heating segments 23 are arranged at intervals along the length direction of the blade. In the direction from the blade root 13 to the blade tip 14, the heat power density of the multiple heating segments 23 gradually increases.

[0103] An embodiment of the present invention provides a heating body 20. By dividing the heating section into multiple heating segments 23, more targeted heat support is provided for multiple sub-regions in the first region 11 and the second region 12, thereby achieving more targeted de-icing at different icing locations. At the same time, by dividing a larger-area heating section into smaller-area heating segments 23 for preparation, it is beneficial for process forming and facilitates the completion of process preparation.

[0104] As an alternative embodiment, the first heating section 21 and / or the second heating section 22 include a prefabricated structure, and the prefabricated structure includes a heating part 1 and a protection part 2 arranged in a stacked manner. The protection part 2 covers the heating part 1, and heat is provided to the housing 10 through the heating part 1.

[0105] An embodiment of the present invention provides a heating body 20. By setting at least one of the two heating sections as a prefabricated structure, it is convenient for the process forming of the heating section, has a more simplified preparation process, and at the same time, has higher flexibility and convenience during the connection process with the housing 10.

[0106] As an alternative embodiment, the heating part 1 includes resistance wires, and the number of resistance wires per unit area of the first heating section 21 is greater than that of the second heating section 22.

[0107] Optionally, the heat power of the resistance wires per unit area of the first heating section 21 is greater than that of the second heating section 22.

[0108] An embodiment of the present invention provides a heating body 20. By setting the heating part 1 in the structural form of resistance wires, the difference in heat power density of different heating sections is achieved by controlling the number or heat power of the resistance wires, and the structure is simple and easy to adjust.

[0109] According to an embodiment of the present invention, a blade is provided, which includes a housing 10 and the ice removing device as described above. The housing 10 includes a first region 11 and a second region 12. The first heating section 21 is disposed in the first region 11 and the second heating section 22 is disposed in the second region 12.

[0110] According to an embodiment of the present invention, a wind turbine generator set is provided, which includes the blade as described above.

[0111] The embodiment of the present invention provides an ice removing device for a blade, a heating element, a blade and a wind turbine generator set. By using the heating element in the ice removing device to heat the housing of the blade, and dividing the heating element into a first heating section and a second heating section connected in series with each other to heat the first region and the second region of the housing respectively, and using the first wire and the second wire in the conductor to connect with the heating element to form a current loop, the simultaneous electric heating and ice removing of different regions of the blade housing are realized, the ice removing area of the blade housing is increased, the overall ice removing ability is improved, the ice removing of the blade is made more sufficient, the phenomenon of uneven ice removing position is avoided, and thus a better ice removing effect is achieved.

[0112] Although the present invention has been described with reference to the preferred embodiments, various modifications can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any manner. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A blade de-icing device is used on a housing (10) of a blade. The housing (10) includes a first region (11) and a second region (12), and is characterized in that, The de-icing device includes: A heating body (20), including a first heating section (21) and a second heating section (22) arranged at intervals. The first heating section (21) is arranged in the first area (11) and the second heating section (22) is arranged in the second area (12). The first heating section (21) and the second heating section (22) are connected in series through a conductor. The heating body (20) is configured to provide heat to the housing (10); A conductor (30), including a first wire (31) and a second wire (32). The first wire (31) is connected to one of the first heating section (21) and the second heating section (22), and the second wire (32) is connected to the other. Current is input to the heating body (20) through the first wire (31) and output through the second wire (32).

2. The de-icing device according to claim 1, characterized in that, The first area (11) includes the windward area and the second area (12) includes the leeward area.

3. The de-icing device according to claim 2, characterized in that, The thermal power density of the first heating section (21) is greater than that of the second heating section (22).

4. The de-icing device according to claim 1, characterized in that, The first heating section (21) and / or the second heating section (22) includes a prefabricated structure, which includes a heating part (1) and a protection part (2) arranged in layers. The protection part (2) covers the heating part (1) and provides heat to the housing (10) through the heating part (1).

5. The de-icing device according to claim 3, characterized in that, The first heating section (21) and the second heating section (22) include resistance wires, and the number of resistance wires per unit area of the first heating section (21) is greater than that of the second heating section (22).

6. The de-icing device according to claim 3, characterized in that, The first heating section (21) and the second heating section (22) include resistance wires, and the thermal power of the resistance wires per unit area of the first heating section (21) is greater than that of the second heating section (22).

7. The de-icing device according to claim 1, wherein The first heating section (21) and / or the second heating section (22) includes a plurality of heating segments (23), and the plurality of heating segments (23) are connected in series through a conductor.

8. The de-icing device according to claim 7, characterized in that, The plurality of heating segments (23) are arranged at intervals along the length direction of the blade. In the direction from the blade root (13) to the blade tip (14), the thermal power density of the plurality of heating segments (23) gradually increases.

9. The de-icing device according to claim 1, characterized in that, The de-icing device includes a plurality of the heating bodies (20), and the plurality of heating bodies (20) are connected in parallel.

10. The de-icing device according to claim 9, characterized in that, The first wire (31) includes a first main path (31a) and a plurality of first branch paths (31b), and the second wire (32) includes a second main path (32a) and a plurality of second branch paths (32b). One end of any heating body (20) is connected to a first branch path (31b) and the other end is connected to a second branch path (32b). The plurality of first branch paths (31b) converge to the first main path (31a) and the plurality of second branch paths (32b) converge to the second main path (32a).

11. The de-icing device according to claim 9, characterized in that, A plurality of the heating elements (20) are arranged at intervals along the length direction of the blade, and in the direction from the blade root (13) to the blade tip (14), the heat power density of the plurality of the heating elements (20) gradually increases.

12. The de-icing device according to claim 1, characterized in that, Connection ends (3) are arranged at the ends of the first heating section (21) and the second heating section (22) respectively. The connection ends (3) protrude from the corresponding ends. The first wire (31) and the second wire (32) are connected to the first heating section (21) and the second heating section (22) through the connection ends (3).

13. A heating element (20) for heating the housing (10) of a blade, the housing (10) comprising a first region (11) and a second region (12), the first region (11) including a windward region, the second region (12) including a leeward region, characterized in that, The heating element (20) includes: A first heating section (21) and a second heating section (22) arranged at intervals. The first heating section (21) is arranged in the first area (11), and the second heating section (22) is arranged in the second area (12). The heat power density of the first heating section (21) is greater than that of the second heating section (22).

14. The heating element (20) according to claim 13, characterized in that, The first heating section (21) and / or the second heating section (22) includes a plurality of heating segments (23), and the plurality of heating segments (23) are connected in series.

15. The heating element (20) according to claim 14, characterized in that, The first heating section (21) and / or the second heating section (22) includes a plurality of heating segments (23), and the plurality of heating segments (23) are arranged at intervals along the length direction of the blade. In the direction from the blade root (13) to the blade tip (14), the heat power density of the plurality of heating segments (23) gradually increases.

16. The heating element (20) according to claim 13, characterized in that, The first heating section (21) and the second heating section (22) include a prefabricated structure. The first heating section (21) and / or the second heating section (22) includes a heating part (1) and a protection part (2) arranged in a stacked manner. The protection part (2) covers the heating part (1), and heat is provided to the housing (10) through the heating part (1).

17. The heating element (20) according to claim 13, characterized in that, The heating part (1) includes resistance wires, and the number of resistance wires in the first heating section (21) is greater than that in the second heating section (22).

18. The heating element (20) according to claim 13, characterized in that, The heating part (1) includes resistance wires, and the heat power of the resistance wires in the first heating section (21) is greater than that of the resistance wires in the second heating section (22).

19. A blade, characterized in that, It includes: The de-icing device according to any one of claims 1 to 12.

20. A blade, characterized in that, It includes: The heating element (20) according to any one of claims 13 to 18.

21. A wind turbine generator, characterized in that, It includes the blade according to any one of claims 19 - 20.

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