Blade, wind turbine, and mounting method for blade heating prefabricated component

Abstract

The present application relates to a heating portion, a heating prefabricated component, a deicing apparatus, a blade, a wind turbine, and a mounting method for the blade heating prefabricated component. The heating prefabricated component comprises a heating portion and a first protection portion; the first protection portion is stacked on the heating portion and covers the heating portion, the heating prefabricated component is connected to the blade via the heating portion, and the heating portion is configured to provide heat to the blade.

Description

Blade, wind turbine generator set and blade heating prefabricated part installation method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the priority of Chinese Patent Application No. 202311871844.9 filed on December 29, 2023, entitled “Blade deicing device, heating body, blade and wind turbine generator set”, the priority of Chinese Patent Application No. 202311868952.0 filed on December 29, 2023, entitled “Installation method of blade deicing device, blade and wind turbine generator set”, the priority of Chinese Patent Application No. 202311871748.4 filed on December 29, 2023, entitled “Blade maintenance method and vacuum seal”, and the priority of Chinese Patent Application No. 202323661889.1 filed on December 29, 2023, entitled “Blade heating and conductive preform, blade, wind turbine generator set”, and the entire contents of the above applications are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of wind power generation, and in particular to a heating portion, a heating prefabricated part, a deicing device, a blade, a wind turbine generator set, and a method for installing a blade heating prefabricated part. Background Art

[0004] In freezing rain and extremely low-temperature areas, ice forms on the blades of wind turbines, changing their aerodynamic shape and reducing their efficiency, leading to power generation losses. Therefore, heating the blades is often necessary to remove the ice.

[0005] However, ice often forms simultaneously at multiple locations on the blade shell surface, and the locations of the ice are highly random. When only local heating is performed on the blade shell, de-icing of multiple areas of the blade is often not achieved, resulting in an insufficient de-icing process and poor de-icing effect.

[0006] Placing heating materials on the blades and supplying electricity to them to achieve the goal of de-icing has proven to be an effective solution to blade de-icing.

[0007] There are two main existing solutions for electric blade heating and de-icing. The first involves placing heating material during blade manufacturing and integrating the heating device into the blade shell through an infusion molding process. However, this pre-molding process must be performed within the mold during blade manufacturing. my country has built a large number of wind power plants, and early blades were not equipped with heating and de-icing devices during manufacturing, leaving a large number of in-service blades unable to effectively de-ice. The second solution involves retrofitting the blades of existing turbines by removing them from the turbine and attaching the heating material to the blade surface through vacuum infusion or hand lay-up. However, wind turbines are large-scale equipment. Most domestic wind turbine towers are between 80 and 120 meters tall, with towers exceeding 150 meters for larger units. With blades 40 to 90 meters long, removing the blades from the turbine is extremely costly. Furthermore, lightning damage to the heating portion of blades produced using these two solutions is extremely difficult to repair. Summary of the Invention

[0008] The present application actually provides a heating part, a heating preform, a deicing device, a blade heating preform installation method, a blade and a wind turbine generator set, which can achieve simultaneous heating and deicing of multiple positions of the blade shell, improve the deicing ability of the blade, and make the deicing of the blade more sufficient.

[0009] In a first aspect, an embodiment of the present application provides a heating preform for heating a blade of a wind turbine generator set, wherein the heating preform includes a heating portion and a first protective portion, the first protective portion is stacked with the heating portion and covers the heating portion, the heating preform is connected to the blade through the heating portion, and the heating portion is configured to provide heat to the blade.

[0010] In a second aspect, an embodiment of the present application also provides a heating unit for heating a shell of a blade, the shell including a first area and a second area, the first area including a windward area, the second area including a leeward area, wherein the heating unit includes: a first heating section and a second heating section arranged at intervals, the first heating section being arranged in the first area and the second heating section being arranged in the second area.

[0011] In a third aspect, an embodiment of the present application provides a deicing device comprising a plurality of the above-mentioned heating preforms, which are connected in parallel, or comprising a plurality of the above-mentioned heating parts, which are connected in parallel.

[0012] In a fourth aspect, an embodiment of the present application provides a method for installing a blade heating preform, comprising: providing a housing, wherein the housing has an inner cavity, and the housing includes an inner surface disposed toward the inner cavity and an outer surface disposed away from the inner cavity;

[0013] providing a heating preform, and providing an adhesive portion on at least one of the outer surface and the heating preform, wherein the heating preform is configured to provide heat to the housing;

[0014] bonding the heated preform to the outer surface via the bonding portion;

[0015] The heating preform is fixed to the shell by using the binding portion, so that the heating preform is attached to the outer surface of the shell through the adhesive portion.

[0016] In a fifth aspect, an embodiment of the present application provides a method for installing a blade heating preform, comprising: providing a shell having an inner cavity, the shell comprising an inner surface arranged toward the inner cavity and an outer surface arranged away from the inner cavity; providing a heating preform, and providing an adhesive portion on at least one of the outer surface and the heating preform; bonding the heating preform and the outer surface together through the adhesive portion; covering a vacuum seal on a side of the heating preform away from the adhesive portion, and forming a sealed cavity that encloses the heating preform between the vacuum seal and the outer surface; evacuating the sealed cavity, and allowing external atmospheric pressure to squeeze the heating preform through the vacuum seal, so that the heating preform is bonded to the outer surface through the adhesive portion.

[0017] In a sixth aspect, an embodiment of the present application provides a blade, wherein the blade is provided with a de-icing device installed using the above-mentioned installation method, or the blade is maintained according to the above-mentioned installation method.

[0018] In a seventh aspect, an embodiment of the present application provides a wind turbine generator set, wherein the wind turbine generator set includes the blades as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings, which are not drawn to scale.

[0020] FIG1 is a schematic structural diagram of a deicing device in a blade according to an embodiment of the present application;

[0021] FIG2 is a schematic cross-sectional view of NN in FIG1 ;

[0022] FIG3 is a partial enlarged schematic diagram of point A in FIG2 ;

[0023] FIG4 is another partial enlarged schematic diagram of point A in FIG2 ;

[0024] FIG5 is a schematic structural diagram of another deicing device according to an embodiment of the present application;

[0025] FIG6 is a schematic structural diagram of another deicing device according to an embodiment of the present application;

[0026] FIG7 is a schematic structural diagram of another deicing device according to an embodiment of the present application;

[0027] FIG8 is a schematic structural diagram of another deicing device according to an embodiment of the present application;

[0028] FIG9 is a schematic structural diagram of another deicing device according to an embodiment of the present application;

[0029] FIG10 is a schematic structural diagram of another deicing device according to an embodiment of the present application;

[0030] FIG11 is a schematic structural diagram of another deicing device according to an embodiment of the present application;

[0031] FIG12 is a flow chart of a method for preparing a blade according to an embodiment of the present application;

[0032] FIG13 is a schematic structural diagram of a blade preparation process according to an embodiment of the present application;

[0033] FIG14 is a schematic structural diagram of a blade during preparation according to an embodiment of the present application;

[0034] FIG15 is a schematic structural diagram of a blade during preparation according to an embodiment of the present application;

[0035] FIG16 is a schematic side structural diagram of FIG15;

[0036] FIG17 is a flow chart of another method for preparing a blade according to an embodiment of the present application;

[0037] FIG18 is a schematic structural diagram of a blade during preparation according to an embodiment of the present application;

[0038] FIG19 is a schematic structural diagram of a blade during preparation according to an embodiment of the present application;

[0039] FIG20 is a schematic structural diagram of a blade during preparation according to an embodiment of the present application;

[0040] FIG21 is a flowchart of an installation process of a heated preform according to an embodiment of the present application;

[0041] FIG22 is a schematic structural diagram of a blade during maintenance according to an embodiment of the present application;

[0042] FIG23 is a flowchart of another installation process of a heated preform according to an embodiment of the present application;

[0043] FIG24 is a schematic structural diagram of a blade during maintenance according to an embodiment of the present application;

[0044] FIG25 is a schematic structural diagram of a blade during maintenance according to an embodiment of the present application;

[0045] FIG26 is a schematic structural diagram of a blade during maintenance according to an embodiment of the present application.

[0046] Reference numerals: 100 - blade; 101 - blade root; 102 - blade tip; 103 - housing; 104 - leading edge; 105 - trailing edge; 20 - heating preform; 21 - heating portion; 22 - first connecting portion; 23 - first protective portion; 24 - first layer; 25 - second layer; 30 - conductive preform; 31 - first conductive preform; 32 - second conductive preform; 80 - lightning protection preform. 106 - first region; 107 - second region; 211 - first heating section; 212 - second heating section; 213 - heating section; 214 - conductor; 2141 - first wiring; 2142 - second wiring; 2141a - first main circuit; 2141b - first branch circuit; 2142a - second main circuit; 2142b - second branch circuit. X - length direction; 26 - bonding portion; 40 - binding portion; 41 - binding strip; 50 - crimping portion; 51 - support strip; 60 - connection portion; 70 - vacuum seal; 71 - first docking portion; 72 - second docking portion; 73 - carrier film; 74 - exhaust port; 75 - sealing portion. DETAILED DESCRIPTION

[0047] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are set forth in order to provide a comprehensive understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the well-known structures and technologies are not shown in order to avoid unnecessary ambiguity in the present application; and, for clarity, the sizes 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.

[0048] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the blade heating and conductive preforms, blades, and wind turbine generator sets of this application. In the description of this application, 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 a direct connection or an indirect connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] In order to better understand the present application, the blade heating and conductive preform, blade, and wind turbine generator set according to an embodiment of the present application are described in detail below with reference to FIG. 1 to FIG. 7 .

[0050] Please refer to Figures 1 and 2. According to an embodiment of the present application, a blade 100 is proposed, which has a blade root 101 and a blade tip 102. The blade 100 includes a shell 103, a heating preform 20 and a conductive preform 30. The shell 103 has an inner cavity, and the shell 103 includes an inner surface facing the inner cavity and an outer surface facing away from the inner cavity; the heating preform 20 is laid on at least one of the inner surface and the outer surface and is connected to the shell 103. As shown in Figure 3, the heating preform 20 includes a first protective portion 23 and a heating portion 21. The first protective portion 23 covers the heating portion 21 on the shell 103; the heating preform 20 is configured to provide heat to the shell 103.

[0051] In this embodiment, the shell 103 and the heating preform 20 of the blade 100 are two independent structures and are molded separately. After the shell 103 is molded by the infusion process, the prefabricated heating preform 20 is laid on the surface of the shell 103 so that the two form a stable connection to obtain the final blade 100 structure. The heating capacity of the heating preform 20 is used to heat the shell 103, thereby achieving a de-icing effect on the surface of the shell 103.

[0052] Among them, the shell 103 has a relative inner surface and outer surface. After the prefabricated heating preform 20 is obtained, it can be laid on the inner surface or the outer surface. Generally, laying the heating preform 20 on the outer surface has a better deicing effect. This is because when the external temperature is low, ice usually forms on the outer surface of the shell 103. The heating preform 20 on the outer surface can directly heat the ice. When the heating preform 20 is laid on the inner surface, the heat generated still needs to be conducted by the shell 103, which will cause some heat loss and is not conducive to heat conduction. Therefore, the deicing effect is not good.

[0053] Optionally, a conductive preform 30 is provided in the shell 103 to supply power to the heating preform 20. The present application does not impose any special restrictions on the specific position of the conductive preform 30 in the shell 103, as long as it can ensure that the conductive preform 30 is electrically connected to the heating preform 20 to supply power to them.

[0054] The conductive preform 30 usually needs to be connected to the power supply inside the unit. The first terminal of the conductive preform 30 is connected to the heating preform 20 and the second terminal is connected to the power supply, so that the current can be conducted from the power supply to the heating preform 20. The conductive preform 30 plays the role of transmitting current.

[0055] Considering that the power source is usually located at the blade root 101, the conductive preform 30 can be arranged at a position of the shell 103 close to the blade root 101 to facilitate connection with the power source. The conductive preform 30 is usually arranged in the inner cavity of the shell 103 to form better isolation protection for the conductive preform 30. At the same time, considering the effect of airflow, the blade tip 102 of the shell 103 is more prone to ice formation than the blade root 101. Therefore, the heating preform 20 can be laid near the blade tip 102 to perform de-icing more targetedly.

[0056] Optionally, the position and area of ​​the heating preform 20 can be set according to different actual needs and flexibly selected according to the actual icing situation. This application does not impose any special restrictions on the laying position and area size of the heating preform 20.

[0057] One embodiment of the present application provides a blade 100. By laying a heating preform 20 on the inner or outer surface of the shell 103 of the blade 100, the shell 103 and the heating preform 20 are formed as two independent components, thereby simplifying the molding process of the blade 100. The molded heating preform 20 only needs to be laid directly on the shell 103 and heated. On the basis of using the heat from the heating to de-ice the shell 103, the reliability of the connection between the heating preform 20 and the shell 103 is improved, and the problem of unstable connection between the two due to complex processes is avoided, thereby achieving a better de-icing effect. At the same time, laying the heating preform 20 directly on the shell 103 after prefabrication reduces the process difficulty, improves the production efficiency, and also facilitates the completion of operations at high altitudes, providing greater production flexibility, thereby reducing the downtime of the unit and reducing the impact on the unit's power generation, and achieving better economic benefits.

[0058] As an optional embodiment, the heating preform 20 and / or the conductive preform 30 are adhesively connected to at least one of the inner surface and the outer surface.

[0059] Optionally, after the shell 103 and the heating preform 20 are formed separately, the heating preform 20 can be bonded to the surface of the shell 103 using structural adhesive. This application takes bonding the heating preform 20 to the outer surface as an example for explanation.

[0060] Specifically, the structural adhesive can be applied to the surface of the shell 103 first, and then the heating preform 20 can be bonded to the structural adhesive. Then, it can be fixed to the surface of the shell 103 using tools such as vacuum film or binding strips to obtain the final blade 100 structure, so that the blade 100 has the performance of heating and deicing.

[0061] An embodiment of the present application provides a blade 100, which simplifies the molding process of the blade 100 by laying the heating preform 20 on the surface of the shell 103 by bonding, facilitates the preparation of the blade 100, and improves the preparation efficiency. The bonding method has higher flexibility, so that a more reliable connection is formed between the heating preform 20 and the shell 103, thereby improving the de-icing effect on the surface of the blade 100.

[0062] As an optional embodiment, referring to FIG. 3 , the heating preform 20 includes a heating portion 21 and a first connecting portion 22 . The first connecting portion 22 and the heating portion 21 are stacked, and the heating preform 20 is bonded to the shell 103 via the first connecting portion 22 .

[0063] The first connection portion 22 mainly serves to contact the surface of the shell 103. By using the first connection portion 22 in contact with the surface of the shell 103, it is convenient to connect the preform as a whole with the shell 103, preventing the heating portion 21 from directly contacting the surface of the shell 103 and causing damage. At the same time, the first connection portion 22 can form a more reliable connection with the surface of the shell 103.

[0064] An embodiment of the present application provides a blade 100 , which provides a specific structural form of a heating preform 20 , so that the heating preform 20 is easy to shape and forms a more reliable connection with the shell 103 .

[0065] As an optional embodiment, referring to FIG. 3 , the heating preform 20 further includes a first protective portion 23 , which is stacked on a side of the heating portion 21 away from the first connecting portion 22 and covers the heating portion 21 .

[0066] Optionally, a first protective portion 23 may be provided on the heating portion 21 , thereby forming a three-layer structure together with the heating portion 21 and the first connecting portion 22 . The first protective portion 23 covers the heating portion 21 to provide isolation and protection for the heating portion 21 .

[0067] An embodiment of the present application provides a blade 100, which provides another specific structural form of a heating preform 20. By providing a first protective portion 23 on the heating portion 21, a covering protection is formed for the heating portion 21 to prevent the heating portion 21 from being exposed to the external environment, thereby avoiding heat loss and also preventing structural wear.

[0068] As an optional embodiment, the first connecting portion 22 and the first protective portion 23 include glass cloth, and the heating portion 21 includes carbon fiber resistance wire.

[0069] Considering that glass cloth is more in line with the material of the shell 103, the first connecting part 22 and the first protective part 23 can be set to glass cloth material in this embodiment, so that the heating preform 20 and the shell 103 form a more stable connection. At the same time, the heating part 21 adopts carbon fiber resistance wire, which has better electric heating efficiency. Of course, heating materials such as graphene can also be used. This application does not make any special restrictions on the specific materials of the first connecting part 22, the first protective part 23 and the heating part 21, and can be selected according to different actual needs.

[0070] The embodiment of the present application provides a blade 100 in which specific materials are provided for each layer of the heating preform 20, so that the material of the heating preform 20 is more closely fitted to the material of the shell 103, forming a reliable connection, while having higher heating efficiency and improving the de-icing capability of the shell 103 surface.

[0071] As an optional embodiment, referring to FIG. 4 , the first protection portion 23 includes a first layer 24 and a second layer 25 that are stacked, and the first layer 24 is located between the second layer 25 and the heating portion 21 .

[0072] Optionally, the first protective part 23 can be set as a double-layer stacked structure of a first layer 24 and a second layer 25, with the first layer 24 forming direct contact and coverage with the heating part 21, and the second layer 25 directly covering the first layer 24, thereby achieving double isolation protection for the heating part 21.

[0073] In this embodiment, the first protective portion 23 is set as a double-layer structure for illustration, and is not limited to the stacked structure of the first layer 24 and the second layer 25. It can be adjusted according to actual needs. This application does not specifically limit the specific structure of the first protective portion 23.

[0074] The blade 100 provided in the embodiment of the present application forms a double-layer isolation protection for the heating part 21 by setting the first protective part 23 to a stacked structure of a first layer 24 and a second layer 25, while enabling the heating part 21 to better transfer heat to the shell 103, reducing heat loss and having a better de-icing effect.

[0075] As an optional embodiment, the conductive preform 30 is adhesively connected to the housing 103 .

[0076] Optionally, like the heating preform 20 , the conductive preform 30 may be bonded to the surface of the housing 103 to achieve connection between the conductive preform 30 and the housing 103 , so that the connection of the conductive preform 30 has better stability.

[0077] The conductive preform 30 can usually be bonded to the inner surface of the housing 103 to isolate and protect the conductive preform 30 , which also facilitates the connection between the conductive preform 30 and the power supply in the inner cavity.

[0078] The blade 100 provided in the embodiment of the present application facilitates the assembly of the conductive preform 30 by bonding the conductive preform 30 to the shell 103, simplifies the process flow, reduces the process difficulty, and at the same time forms a more stable current conduction for the heating preform 20.

[0079] As an optional embodiment, the conductive preform 30 includes a conductive part and a second connecting part, the second connecting part and the conductive part are stacked, the conductive preform 30 is bonded to the shell 103 through the second connecting part, and the conductive part has a first connecting end and a second connecting end.

[0080] Optionally, the conductive preform 30 can also be set as a preform structure. The specific structure is that the conductive part is stacked on the second connecting part. After obtaining a separately formed preform, the second connecting part is used to form a bond with the shell 103. Since the preform structure of the conductive preform 30 is similar to the structure of the above-mentioned heating preform 20, the specific structural form of the conductive preform 30 can be referred to Figure 3 by analogy, and will not be repeated in the figure.

[0081] Specifically, the conductive portion has the function of conducting current, and the first terminal and the second terminal are specifically on the conductive portion, which is connected between the power source and the heating preform 20 to conduct current.

[0082] An embodiment of the present application provides a blade 100, which further simplifies the molding process of the shell 103 by setting the conductive preform 30 as a preform structure, making it easier to connect the conductive preform 30 and the heating preform 20 by bonding. The connection between the two has better stability, further improving the reliability of the structure.

[0083] As an optional embodiment, the conductive preform 30 further includes a second protective portion, which is stacked on a side of the conductive portion away from the second connecting portion, and covers the conductive portion.

[0084] Similarly, a second protective portion may be provided on the conductive portion, thereby forming a three-layer structure together with the conductive portion and the second connecting portion. The second protective portion covers the conductive portion to provide isolation and protection for the conductive portion.

[0085] The blade 100 provided in the embodiment of the present application provides a specific structural form of a conductive preform 30. By providing a second protective portion on the conductive portion, the conductive portion is covered and protected to prevent the conductive portion from being exposed to the external environment and prevent wear of the structure.

[0086] As an optional embodiment, the second connecting portion and the second protective portion include glass cloth, and the conductive portion includes a wire.

[0087] Also considering that glass cloth is more in line with the material of the shell 103, the second connecting part and the second protective part can be set to glass cloth material in this embodiment, so that the prefabricated conductive preform 30 forms a more stable connection with the shell 103. At the same time, the conductive part adopts a wire. When the conductive preform 30 is bonded to the inner surface of the shell 103, there is no need to consider the flatness of the surface. The conductive part can adopt a round wire to facilitate the conduction of current to the heating preform 20. This application does not make any special restrictions on the specific structural materials of the second connecting part, the second protective part and the conductive part, and can be selected according to different actual needs.

[0088] The blade 100 provided in the embodiment of the present application provides specific materials for each layer of the prefabricated conductive preform 30, so that the material of the conductive preform 30 is more closely matched with the material of the shell 103, forming a reliable connection and further improving the reliability of the structure.

[0089] As an optional embodiment, referring to FIG5 , the blade 100 includes a plurality of conductive preforms 30 , wherein the plurality of conductive preforms 30 include a first conductive preform 31 and a second conductive preform 32 connected to each other. The first conductive preform 31 is disposed in the housing 103 and is located between the heating preform 20 and the second conductive preform 32 . One end of the first conductive preform 31 is connected to the first terminal and the other end is connected to the heating preform 20 .

[0090] Considering that when the distance between the second conductive preform 32 and the heating preform 20 is large, a direct connection between the two cannot be achieved, in order to form a stable connection between the two, a first conductive preform 31 can be set between the two to form a transition, thereby ensuring that the current can continue to be conducted to the heating preform 20 through the first conductive preform 31.

[0091] Optionally, since the second conductive preform 32 is usually arranged at the blade root 101 and the heating preform 20 is usually arranged at the blade tip 102, in order to achieve the transition between the two, the first conductive preform 31 can be arranged at the blade center position of the shell 103, and the specific position can be determined according to actual needs.

[0092] The first conductive preform 31 and the second conductive preform 32 have the same function of transmitting current. According to the distance between the second conductive preform 32 and the heating preform 20, different numbers of first conductive preforms 31 can be provided to realize current transfer, thereby ensuring that the current at the power supply can be stably transmitted to the heating preform 20.

[0093] The blade 100 provided in the embodiment of the present application realizes the connection between the second conductive preform 32 and the heating preform 20 by arranging the first conductive preform 31 on the shell 103, overcoming the problem of the inability to directly connect the two due to the large distance between them, making the conduction of current more stable and providing reliable guarantee for sustainable de-icing capability.

[0094] As an optional embodiment, the first conductive preform 31 is adhesively connected to the housing 103 .

[0095] Optionally, the first conductive preform 31 may also be connected to the housing 103 by bonding, which facilitates the assembly of the first conductive preform 31 and provides better stability.

[0096] Optionally, the first conductive preform 31 may be bonded to the inner surface or outer surface of the housing 103 according to different requirements, as long as it can form a connection with the second conductive preform 32 and the heating preform 20 .

[0097] An embodiment of the present application provides a blade 100 that is connected to a shell 103 by bonding, which simplifies the process flow, facilitates reliable connection between the two, and has better structural stability.

[0098] As an optional embodiment, the first conductive preform 31 can also be set as a preform structure. The specific structure is also to stack the conductive part on the second connecting part. After obtaining a separately formed preform, the second connecting part is used to form a bond with the shell 103. Since the preform structure of the first conductive preform 31 is similar to the structure of the above-mentioned heating preform 20, the specific structural form of the first conductive preform 31 can be referred to Figure 3 by analogy and will not be repeated in the figure.

[0099] Specifically, the conductive portion has the function of conducting current. The first terminal is specifically connected to the conductive portion. The conductive portion of the first conductive preform 31 is connected between the second conductive preform 32 and the heating preform 20 to conduct current.

[0100] The blade 100 provided in the embodiment of the present application further simplifies the molding process of the shell 103 by setting the first conductive preform 31 as a preform structure, making it easier to connect the first conductive preform 31 with the heating preform 20 by bonding, so that the connection between the second conductive preform 32 and the heating preform 20 has better stability, further improving the reliability of the structure.

[0101] As an optional embodiment, referring to FIG. 2 to FIG. 4 , the shell 103 includes a leading edge 104 and a trailing edge 105 that are oppositely disposed. In the direction from the leading edge 104 to the trailing edge 105 , the thickness of the heated preform 20 decreases.

[0102] The blade 100 provided in the embodiment of the present application adjusts the thickness of the heated preform 20 so that the thickness of the heated preform 20 gradually decreases in the direction from the leading edge 104 to the trailing edge 105, so that it can better conform to the outer shape of the shell 103, fit the contour shape of the shell 103, and achieve a more reliable connection with the shell 103.

[0103] As an optional embodiment, please refer to Figure 3, the heating preform 20 also includes a first connecting portion 22, which is stacked on the side of the heating portion 21 away from the first protective portion 23, and the first protective portion 23 covers and extends beyond the heating portion 21, and the heating portion 21 covers and extends beyond the first connecting portion 22.

[0104] In this embodiment, in the three-layer structure of the heated preform 20, the size of each layer is adjusted to form a difference in coverage, thereby obtaining a stepped height difference structure, achieving a gradual thinning from the leading edge 104 to the trailing edge 105, and meeting the requirements of fitting the outer contour of the shell 103.

[0105] Specifically, the first protective portion 23 is used to cover the heating portion 21, so that the coverage range of the first protective portion 23 exceeds the coverage range of the heating portion 21, and then the heating portion 21 covers the first connecting portion 22, so that the coverage range of the heating portion 21 exceeds the coverage range of the first connecting portion 22, so that the thickness of the heated preform 20 at the leading edge 104 is larger and the thickness gradually decreases as it extends to the trailing edge 105.

[0106] The blade 100 provided in the embodiment of the present application has a differentiated design for the coverage range of the three-layer structure of the heating preform 20, so that the thickness of the heating preform 20 at the leading edge 104 and the trailing edge 105 tends to be thinner. On the basis of making the heating preform 20 have better connection performance and protection performance, it conforms to the outer contour of the shell 103 to form a more stable fitting connection.

[0107] As an optional embodiment, please refer to Figure 4, the first protective part 23 includes a first layer 24 and a second layer 25 that are stacked, the first layer 24 is located between the second layer 25 and the heating part 21, the first layer 24 covers and extends beyond the heating part 21, and the second layer 25 covers and extends beyond the first layer 24.

[0108] In this embodiment, in the other three-layer structure of the heated preform 20, the size of each layer is adjusted to form a difference in coverage, thereby obtaining a stepped height difference structure, achieving a gradual thinning from the leading edge 104 to the trailing edge 105, and meeting the requirements of fitting the outer contour of the shell 103.

[0109] Specifically, the double-layer structure of the first protective portion 23 is used to cover the heating portion 21, so that the coverage range of the second layer 25 in the first protective portion 23 exceeds the coverage range of the first layer 24, and then the first layer 24 is directly contacted and covered on the heating portion 21, so that the coverage range of the first layer 24 exceeds the coverage range of the heating portion 21, so that the thickness of the heating preform 20 at the leading edge 104 is larger and the thickness gradually decreases when extending to the trailing edge 105.

[0110] The blade 100 provided in the embodiment of the present application has a differentiated design for the coverage of the other three layers of the heating preform 20, so that the thickness of the heating preform 20 at the leading edge 104 and the trailing edge 105 tends to be thinner. On the basis of making the heating preform 20 have better protective performance, it conforms to the outer contour of the shell 103 to form a more stable fitting connection.

[0111] As an optional embodiment, the surface profiles of the heated preform 20 and the shell 103 have the same extension direction.

[0112] The blade 100 provided in the embodiment of the present application is connected by fitting the heating preform 20 to the shell 103, so that the heating preform 20 can conform to the outer surface of the shell 103 and have the same contour as the shell 103 to form a more stable connection with better connection stability.

[0113] As an optional embodiment, the side of the first protective portion 23 facing away from the housing 103 is coated with paint.

[0114] The blade 100 provided in the embodiment of the present application is produced by bonding the heated preform 20 to the shell 103 and then coating the shell 103 with paint. This not only protects the shell 103 but also makes the surface of the shell 103 smoother, which is conducive to the flow of air on the surface of the shell 103 and forms a more stable airflow driving force.

[0115] As an optional embodiment, referring to FIG6 , the blade 100 includes a lightning protection preform 80 , which is bonded to the blade tip 102 . The lightning protection preform 80 includes a lightning receptor connected to the down conductor.

[0116] Considering that the blades 100 are de-iced by electric heating in this embodiment, the shell 103 is provided with a conductive preform 30 and a heating preform 20 and other structures. Therefore, in order to prevent the above components from being disturbed by lightning during the de-icing process, a lightning protection preform 80 is provided in this embodiment to conduct lightning.

[0117] Optionally, the lightning protection prefabricated component 80 can also be a prefabricated structure, which is bonded to the shell 103 after being formed separately, specifically at the blade tip 102 to better absorb lightning. The prefabricated component structure facilitates subsequent assembly and further simplifies the process flow.

[0118] Among them, the lightning protection preform 80 mainly absorbs lightning through the lightning receptor. Optionally, the lightning receptor can adopt a lightning grid structure to absorb lightning over a larger area. The lightning receptor is connected to the down conductor to conduct lightning, thereby avoiding lightning interference with the conductive preform 30 and the heating preform 20 on the shell 103, affecting the heating and de-icing effect.

[0119] The blade 100 provided in the embodiment of the present application has a lightning protection preform 80 bonded to the blade tip 102, thereby providing better lightning protection for the shell 103, preventing lightning from interfering with the electric heating process on the shell 103, providing better lightning protection for the heating and deicing process, having better safety performance, and providing a guarantee for stable and sustainable deicing.

[0120] As an optional embodiment, referring to FIG. 7 , the blade 100 includes a plurality of heating preforms 20 , which are laid on the shell 103 at intervals, and the conductive preforms 30 are connected to the plurality of heating preforms 20 , respectively.

[0121] Considering that different positions of the shell 103 need to be de-iced respectively, in this embodiment, a plurality of heating prefabricated members 20 may be laid on the shell 103 to heat and de-ice the multiple positions respectively.

[0122] The present application does not impose any special limitation on the number of the specific heating preforms 20 , which can be determined according to different actual deicing requirements.

[0123] The blade 100 provided in the embodiment of the present application can heat and de-ice different positions of the shell 103 at the same time by laying multiple heating preforms 20 on the shell 103, thereby achieving a better de-icing effect.

[0124] As an optional embodiment, the conductive preform 30 is disposed at the blade root 101 , and the heating preform 20 is laid on a side of the conductive preform 30 close to the blade tip 102 .

[0125] Considering that the power supply is usually set at the blade root 101, in order to facilitate the connection of the conductive preform 30 to the power supply, the conductive preform 30 can be set at the blade root 101. Compared with the blade root 101, the blade tip 102 is more prone to ice formation. Therefore, the heating preform 20 can be laid at the blade tip 102, and finally the conductive preform 30 and the heating preform 20 are connected to realize the deicing process of electric heating.

[0126] The blade 100 provided in the embodiment of the present application determines the positional relationship between the conductive preform 30 and the heating preform 20 , making it easier to connect the two, completing the deicing process more specifically and achieving a better deicing effect.

[0127] An embodiment of the present application provides a wind turbine generator set, including the blade 100 described above.

[0128] One embodiment of the present application provides a blade heating preform, a conductive preform, a blade, and a wind turbine generator set. By laying the heating preform on the inner or outer surface of the blade shell, the shell and the heating preform are formed as two independent components, thereby simplifying the blade molding process. The formed heating preform only needs to be laid directly on the shell for heating. On the basis of using the heat from the heating to de-ice the shell, the reliability of the connection between the heating preform and the shell is improved, and the problem of unstable connection between the two due to complex processes is avoided, thereby achieving a better de-icing effect. At the same time, laying the heating preform directly on the shell after prefabrication reduces the process difficulty, improves the production efficiency, and is also conducive to completing operations at high altitudes, with better production flexibility, thereby reducing the downtime of the unit and reducing the impact on the unit's power generation, and achieving better economic benefits.

[0129] Referring to Figures 8 to 10 , one embodiment of the present application provides a heating unit 21 disposed on a blade housing 103. The housing 103 includes a first region 106 and a second region 107. The heating unit 21 includes a first heating segment 211 and a second heating segment 212 spaced apart from each other. The first heating segment 211 is disposed in the first region 106, and the second heating segment 212 is disposed in the second region 107. The first heating segment 211 and the second heating segment 212 are connected in series via a conductor. The heating unit 21 is configured to provide heat to the housing 103.

[0130] In order to remove ice on the surface of the blade shell 103, the heating portion 21 provided in this embodiment provides heat to the shell 103 through the principle of electric heating, thereby melting the ice to achieve the purpose of de-icing.

[0131] Optionally, in this embodiment, the first heating section 211 and the second heating section 212 in the heating portion 21 are used to de-ice two areas respectively, thereby achieving simultaneous de-icing of different areas of the shell 103 .

[0132] Optionally, the heating portion 21 may be configured as a prefabricated structure, so that the heating portion 21 and the housing 103 can be independently formed and then laid on the housing 103 .

[0133] As for the heating part 21 being set on the shell 103, it can be set on the inner surface or outer surface of the shell 103. When the heating part 21 is set on the outer surface, it can directly electrically heat the outer surface, thereby directly providing heat to the outer surface; when the heating part 21 is set on the inner surface, de-icing is performed by conducting heat to the outer surface.

[0134] Of course, the heating portion 21 in this embodiment can also be integrated into the shell 103 during the injection molding process of the blade shell 103 and formed integrally with the blade shell 103, so as to achieve simultaneous heating of different areas of the shell 103.

[0135] In order to ensure that the first heating segment 211 and the second heating segment 212 in the heating part 21 are used to heat the first area 106 and the second area 107 at the same time, the two need to be connected in series. Considering that direct contact between the two heating segments will cause a short circuit, the two need to be set at intervals and connected in series to achieve simultaneous electrical heating of different areas.

[0136] As shown in Figures 8 and 9, an embodiment of the present application provides a heating unit 21. The heating unit 21 also includes a conductor 214. The conductor 214 includes a first trace 2141 and a second trace 2142. The first trace 2141 is connected to one of the first heating section 211 and the second heating section 212, and the second trace 2142 is connected to the other. Current is input to the heating unit 21 through the first trace 2141 and output through the second trace 2142. The specific structure of the conductor 214 includes a first trace 2141 and a second trace 2142, each connected between the heating unit 21 and a power source. The current in the first trace 2141 flows from the power source to the heating unit 21, and the second trace 2142 acts as a loop to conduct the current to the power source. The heating unit 21, the conductor 214, and the power source together form a closed loop. Optionally, the power source can be located at the blade root 101 to facilitate lead connection. Optionally, the conductor 214 is a prefabricated part.

[0137] The heating unit 21 provided in the embodiment of the present application heats the shell 103 of the blade by utilizing the heating unit 21, and divides the heating unit 21 into a first heating segment 211 and a second heating segment 212 connected in series to heat the first area 106 and the first area 107 of the shell 103 respectively, and utilizes the first trace 2141 and the second trace 2142 in the conductor 214 to connect with the heating unit 21 to form a current loop, thereby realizing simultaneous electric heating and deicing of different areas of the blade shell 103, increasing the deicing area of ​​the blade shell 103, improving the overall deicing capability, making the deicing of the blade more sufficient, thereby having a better deicing effect, and the circuit is simple and easy to operate, which is conducive to the installation of the heating unit 21.

[0138] As an optional embodiment, the first region 106 includes a windward region and the second region 107 includes a leeward region, and the thermal power density of the first heating section 211 is greater than the thermal power density of the second heating section 212 .

[0139] Optionally, the first heating section 211 may be disposed on the windward side of the housing 103 and the second heating section 212 may be disposed on the leeward side of the housing 103 , so that the heating unit 21 can heat and de-ice both the windward side and the leeward side simultaneously.

[0140] Since the windward area is more affected by the wind than the leeward area, icing is more likely to occur in the windward area. Therefore, in this embodiment, the difference in thermal power density between the first heating section 211 and the second heating section 212 is controlled, and the thermal power density of the first heating section 211 is greater than the thermal power density of the second heating section 212, thereby achieving more effective de-icing of the windward area.

[0141] Among them, the thermal power density refers to the thermal work done by the heating section per unit area per unit time. The thermal power density of the first heating section 211 is greater than the thermal power density of the second heating section 212. That is, 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 de-icing in the windward area.

[0142] As an optional embodiment, the first heating segment 211 and the second heating segment 212 include resistance wires, and the number of resistance wires per unit area of ​​the first heating segment 211 is greater than the number of resistance wires of the second heating segment 212 .

[0143] When it is necessary to satisfy that the thermal power density of the first heating section 211 is greater than the thermal power density of the second heating section 212, at this time, when the areas of the first heating section 211 and the second heating section 212 are equal, the thermal power density can be controlled by controlling the number of resistance wires, and this is achieved by having the number of resistance wires in the first heating section 211 be greater than the number of resistance wires in the second heating section 212.

[0144] Optionally, the heating portion 21 includes a resistance wire, and the heating power per unit area of ​​the resistance wire of the first heating section 211 is greater than the heating power per unit area of ​​the resistance wire of the second heating section 212 .

[0145] As an optional embodiment, referring to FIG. 9 , the first heating section 211 and / or the second heating section 212 includes a plurality of heating segments 213 , and the plurality of heating segments 213 are connected in series via conductors.

[0146] Furthermore, the first heating section 211 and the second heating section 212 are respectively divided into a plurality of heating sub-segments 213 and connected in series with each other, so that each sub-region in the first area 106 and the second area 107 can be heated more specifically.

[0147] In the embodiment of the present application, there is no special limitation on the number of heating segments 213 into which the first heating segment 211 and the second heating segment 212 are specifically divided, as long as it is ensured that the heating segments 213 are connected in series to provide heat to each sub-area.

[0148] At the same time, in the embodiment of the present application, there is no special limitation on the specific arrangement of the multiple heating segments 213. The multiple heating segments 213 formed can be set at corresponding deicing positions according to different actual deicing requirements to achieve heating and deicing of multiple sub-areas.

[0149] Optionally, the thermal power density of the heating segment 213 may be designed according to the deicing requirements of different regions of the blade.

[0150] The heating portion 21 provided in one embodiment of the present application divides the heating section into a plurality of heating segments 213, thereby providing heat support to a plurality of sub-areas in the first area 106 and the second area 107, thereby achieving more targeted de-icing of different icing locations. As the blades become longer and longer with the trend of larger units, the larger heating section is divided into smaller heating segments 213 for preparation, which is beneficial to process molding and facilitates the completion of process preparation.

[0151] As an optional embodiment, the plurality of heating segments 213 are arranged at intervals along the length direction of the blade, and the thermal power density of the plurality of heating segments 213 gradually increases in the direction from the blade root 101 to the blade tip 102 .

[0152] The multiple heating segments 213 formed can be arranged along the length direction of the blade, and the whole is arranged in the direction from the blade root 101 to the blade tip 102, and connected in series through conductors.

[0153] Taking into account the actual airflow patterns during the rotation of the blade, the tip 102 of the blade is more significantly affected by the wind than the root 101, so it is more prone to ice formation. By arranging heating segments 213 with different thermal power densities along the length of the blade, it is more conducive to targeted de-icing.

[0154] Specifically, the heating segment 213 close to the blade tip 102 has a higher thermal power density than the heating segment 213 close to the blade root 101. The overall arrangement pattern is that the thermal power density of multiple heating segments 213 gradually increases in the direction from the blade root 101 to the blade tip 102, showing a gradual trend, thereby better meeting the actual icing environment on the blade.

[0155] In this way, compared with the blade root 101 side, the heating segment 213 close to the blade tip 102 side can provide more heat to the shell 103 per unit time, thereby adapting to the actual working conditions where ice is more likely to form at the blade tip 102 and forming a better deicing effect on the blade tip 102.

[0156] Optionally, when the heating section adopts a prefabricated structure, each heating segment 213 is also bonded to the surface of the shell 103 as a prefabricated structure. When reflecting the difference in thermal power density of each heating segment 213, the difference can be achieved by adjusting the number of resistance wires per unit area and / or the thermal power of resistance wires per unit area in each heating segment 213, that is, the number of resistance wires per unit area and / or the thermal power of resistance wires per unit area in the heating segment 213 close to the blade tip 102 is greater than that in the heating segment 213 close to the blade root 101.

[0157] The heating portion 21 provided in the embodiment of the present application arranges multiple heating segments 213 along the length direction of the blade, thereby fully de-icing the position. At the same time, by controlling and adjusting the difference in thermal power density of each heating segment 213 in this direction, more heat is provided to the blade tip 102 position compared to the blade root 101 position, thereby adapting to the actual icing pattern of the blade and de-icing the blade tip 102 and blade root 101 positions in a more targeted manner.

[0158] This embodiment further provides a deicing device. Please refer to FIG. 10 . The deicing device includes a plurality of heating units 21 , and the plurality of heating units 21 are connected in parallel.

[0159] Optionally, in this embodiment, the deicing device is provided with a plurality of heating parts 21 , and the plurality of heating parts 21 are connected in parallel, thereby further increasing the deicing area and achieving simultaneous deicing of more areas on the surface of the shell 103 .

[0160] In this embodiment, there is no special limitation on the number of heating parts 21 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 parts 21, and they can be set according to the actual deicing positions to meet the parallel connection between the heating parts 21 and form electric heating.

[0161] The blade deicing device provided in the embodiment of the present application increases the coverage range of the heating part 21 by arranging multiple heating parts 21 in the deicing device and arranging them in parallel, further increasing the deicing area of ​​the deicing device, and can achieve simultaneous heating and deicing of multiple different areas, more targeted deicing of required areas, with higher deicing capacity, and improved overall deicing effect.

[0162] As an optional embodiment, please refer to Figure 10, the first line 2141 includes a first main road 2141a and multiple first branches 2141b, the second line 2142 includes a second main road 2142a and multiple second branches 2142b, one end of any heating part 21 is connected to a first branch 2141b and the other end is connected to a second branch 2142b, multiple first branches 2141b converge to the first main road 2141a and multiple second branches 2142b converge to the second main road 2142a.

[0163] In the structure with multiple heating units 21 connected in parallel, for the specific structure of the conductor 214, the first line 2141 is divided into a first main line 2141a and multiple first branches 2141b, and the second line 2142 is divided into a second main line 2142a and multiple second branches 2142b.

[0164] Any one of the first branches 2141b is connected to one end of the heating part 21, so that the first branch 2141b provides current to the heating part 21, and any one of the second branches 2142b is connected to the other end of the heating part 21, so that the second branch 2142b outputs current. In this way, multiple first branches 2141b converge and are connected to the first main road 2141a and multiple second branches 2142b converge and are connected to the second main road 2142a. The first main road 2141a provides current to multiple first branches 2141b respectively, and the current is divided at the multiple first branches 2141b and corresponds to each heating part 21. At the same time, the current flowing out of multiple heating parts 21 is converged into the second main road 2142a through the corresponding second branches 2142b for transmission.

[0165] The blade deicing device provided in the embodiment of the present application realizes the parallel connection of multiple heating parts 21 by dividing the wiring into main and branch connections, which is conducive to completing the transmission of the parallel circuit and providing a guarantee for further improving the coverage area of ​​the heating part 21.

[0166] As an optional embodiment, the plurality of heating parts 21 are arranged at intervals along the length direction of the blade, and the thermal power density of the plurality of heating parts 21 gradually increases in the direction from the blade root 101 to the blade tip 102 of the blade.

[0167] Optionally, while multiple heating parts 21 are connected in parallel, the multiple heating parts 21 are arranged along the length direction of the blade. As mentioned above, the blade tip 102 and the blade root 101 have different icing conditions, and it is necessary to design the thermal power density of the heating part 21 differently based on the parallel structure.

[0168] From the above analysis, it can be seen that the thermal power density of the heating part 21 at the blade tip 102 needs to be greater than the thermal power density of the heating part 21 at the blade root 101. Therefore, in the parallel structure, the thermal power density of the heating part 21 shows an increasing trend in the direction from the blade root 101 to the blade tip 102.

[0169] Optionally, the heating unit 21 is used as the heating unit for heating the preform 20 . When the heating unit 21 is used as the heating unit for heating the preform 20 , the conductor 214 is optionally in electrical communication with the conductive preform 30 .

[0170] Optionally, when the heating part 21 is used as the heating part for heating the preform 20, the thermal power density can also be adjusted by controlling the number of resistance wires therein, and a larger number of resistance wires can be set in the heating part 21 near the blade tip 102 to reflect the structural difference.

[0171] Referring to FIG. 12 , an embodiment of the present application provides a method for installing a blade heating preform. Optionally, the blade heating preform is the heating preform 20 in the above embodiment. The method includes:

[0172] S1. Provide a housing 103, wherein the housing 103 has an inner cavity and includes an inner surface facing the inner cavity and an outer surface facing away from the inner cavity;

[0173] S2, providing a heating preform 20, and providing an adhesive portion 26 on at least one of an outer surface and the heating preform 20, wherein the heating preform 20 is configured to provide heat to the housing 103;

[0174] S3, bonding the heated preform 20 to the outer surface via the bonding portion 26;

[0175] S4. Fix the heating preform 20 on the shell 103 using the binding portion 40 so that the heating preform 20 is attached to the outer surface of the shell 103 through the adhesive portion 26.

[0176] In step S1 , the provided housing 103 is usually pre-formed by using a mold through a resin infusion process, and the initial housing 103 is obtained after the upper and lower molds are clamped.

[0177] Optionally, the shell 103 itself has an inner cavity, in which structures such as a web are usually provided to support the shell 103. The shell 103 has relative inner and outer surfaces after the mold is closed. The present application is directed to an installation method for bonding the heating preform 20 to the outer surface, thereby utilizing the heating performance of the heating preform 20 to provide heat to the shell 103, and ultimately achieving the purpose of de-icing the surface of the shell 103.

[0178] Optionally, the heated preform 20 bonded in this embodiment belongs to a prefabricated structure, that is, the heated preform 20 and the shell 103 are two independent components. After being formed separately, the heated preform 20 is bonded to the outer surface of the shell 103 to form an integral blade structure.

[0179] In step S2, an adhesive portion 26 may be provided between the provided shell 103 and the heated preform 20. Specifically, the adhesive portion 26 may be provided on the outer surface of the shell 103, or on the surface of the provided heated preform 20, or on the shell 103 and the heated preform 20, respectively. The purpose is to use the adhesive portion 26 to bond the heated preform 20 and the shell 103. Please refer to Figure 13. In this embodiment, the adhesive portion 26 is provided on the provided shell 103. Optionally, the adhesive portion 26 may be made of a material such as structural adhesive, and the adhesive portion 26 is applied to the outer surface of the shell 103, specifically at the position to be bonded of the heated preform 20.

[0180] Then, in step S3 , the heating preform 20 is bonded to the outer surface via the bonding portion 26 , so that a preliminary connection is formed between the heating preform 20 and the housing 103 , as shown in FIG. 14 .

[0181] Optionally, according to different actual needs, multiple heating preforms 20 can be bonded to the outer surface to cover a larger area of ​​the outer surface and achieve large-area heating and deicing. The specific number and area need to be determined according to actual deicing needs.

[0182] In order to further bond and fix the heating preform 20 to the shell 103 so as to form a stable connection with the shell 103, in step S4, the binding portion 40 can be used to fix the initially bonded heating preform 20 to the shell 103, so that the heating preform 20 and the shell 103 form a tighter connection and the bonding between the two is more sufficient, please refer to Figures 15 and 16. Optionally, the binding portion 40 can adopt a belt-like structure or a strip-like structure, which can be used to bind the heating preform 20 to the shell 103.

[0183] Optionally, after it is determined that the heated preform 20 is sufficiently bonded to the shell 103 , the binding portion 40 may be removed to separate it from the shell 103 , thereby obtaining the final blade structure.

[0184] The embodiment of the present application provides a method for installing a blade heating preform. The method adheres the heating preform 20 to the outer surface of the blade shell 103 by using the adhesive portion 26, and fixes the heating preform 20 by using the binding portion 40, thereby attaching the heating preform 20 to the outer surface of the shell 103. This achieves heating the blade shell 103 by electric heating, thereby achieving the purpose of de-icing the surface of the shell 103. The installation method has simple steps, a simplified process flow, and reduced difficulty. It is conducive to the molding of the blade, convenient for the staff to operate, and more efficiently achieves the de-icing performance of the blade itself. At the same time, the tools used in the method are simple, which reduces the process preparation cost and has better economic benefits. The installation method can be constructed on a wind turbine without disassembling the blade. After the heating and de-icing device laid by this installation method is damaged by lightning, the heating preform 20 can be repaired and replaced.

[0185] As an optional embodiment, referring to FIG. 17 in conjunction with FIG. 16 and FIG. 18 , before the step of fixing the heating preform 20 to the housing 103 using the binding portion 40 so that the heating preform 20 is adhered to the outer surface of the housing 103 via the adhesive portion 26 , the installation method further includes:

[0186] S4 ′, providing a pressing portion 50 on the side of the heated preform 20 facing away from the bonding portion 26 .

[0187] Optionally, the crimping portion 50 may be of various structural forms, and its main function is to form a certain degree of crimping on the heating preform 20 so that the heating preform 20 can be further bonded to the shell 103 through the bonding portion 26 .

[0188] Therefore, after the heating preform 20 is bonded to the housing 103 via the bonding portion 26 , the crimping portion 50 can also be bonded to the heating preform 20 by bonding, preparing for the next step of crimping the heating preform 20 .

[0189] The embodiment of the present application provides a method for installing a blade heating preform by setting a crimping portion 50 on the heating preform 20, and utilizing the crimping performance of the crimping portion 50 to further crimp the heating preform 20 so that it can be more fully bonded to the outer surface of the shell 103.

[0190] As an optional embodiment, referring to FIG. 17 in conjunction with FIG. 16 , FIG. 18 , and FIG. 19 , the steps of fixing the heating preform 20 to the housing 103 using the binding portion 40 so that the heating preform 20 is adhered to the outer surface of the housing 103 via the adhesive portion 26 include:

[0191] S41, covering at least a portion of the crimping portion 50 with the binding portion 40;

[0192] S42 , using the binding portion 40 to fix the crimping portion 50 on the heating preform 20 , so that the crimping portion 50 crimps the heating preform 20 onto the bonding portion 26 .

[0193] In steps S41 and S42, after the crimping portion 50 is set on the heated preform 20, at least part of the crimping portion 50 is bundled using the binding portion 40, so that the tightening force formed on the binding portion 40 is transmitted to the heated preform 20 through the crimping portion 50. The crimping portion 50 indirectly forms a crimping force on the heated preform 20, squeezing it onto the bonding portion 26 to form bonding with the shell 103.

[0194] An embodiment of the present application provides a method for installing a blade heating preform, by using a binding portion 40 to fix a crimping portion 50 on the heating preform 20, thereby indirectly providing an extrusion force to the heating preform 20 through the crimping portion 50, and more fully bonding the heating preform 20 to the shell 103, forming a more stable bond.

[0195] As an optional embodiment, the step of providing a crimping portion 50 on a side of the heated preform 20 facing away from the bonding portion 26 includes:

[0196] A crimping portion 50 is provided, comprising a curved plate and a plurality of crimping teeth disposed on the curved plate. The shape of the curved plate matches the shape of the surface of the heated preform 20 facing away from the bonding portion 26. The plurality of crimping teeth extend along a length direction X of the curved plate, with adjacent crimping teeth at least partially spaced apart in the direction in which the curved surface of the curved plate extends.

[0197] The curved plate of the pressing portion 50 is arranged to cover the heating preform 20 and is bonded to the heating preform 20 .

[0198] In this embodiment, a structural form of a crimping portion 50 is provided, in which the crimping portion 50 is set to a curved plate-like structure, and the extension direction of the curved plate structure matches the curved surface of the shell 103 where the heating preform 20 is located, so that the curved plate structure of the crimping portion 50 can be bonded to the shell 103 where the heating preform 20 is located.

[0199] A plurality of pressing teeth are provided on the curved plate of the crimping portion 50. The pressing teeth are in a strip-shaped structure on the curved plate. Each pressing tooth is arranged at intervals and extends along the length direction X, so that it can cover the shell 103 in the length direction X and have a larger contact area with the initially bonded heated preform 20.

[0200] When the binding portion 40 is used to bind the crimping portion 50 , the binding portion 40 comes into contact with the plurality of pressing teeth on the curved plate, thereby transmitting a tightening force through the pressing teeth to adhere the heating preform 20 to the shell 103 .

[0201] An embodiment of the present application provides an installation method for a blade heating preform, which provides a structural form of a crimping portion 50, which forms a better bond with the heating preform 20 through the curved plate and realizes crimping of the heating preform 20 through the pressing teeth, so that the heating preform 20 can be more tightly bonded to the shell 103.

[0202] As an optional embodiment, referring to FIG. 15 to FIG. 17 , the step of providing a crimping portion 50 on a side of the heated preform 20 facing away from the bonding portion 26 includes:

[0203] Providing a crimping portion 50, the crimping portion 50 includes a plurality of support bars 51;

[0204] Each support bar 51 is bonded to the heating preform 20 along the length direction X of the shell 103 , and adjacent support bars 51 are arranged at intervals in the extension direction of the curved surface of the shell 103 .

[0205] Optionally, the crimping portion 50 can be set to a structural form of multiple support bars 51. When the support bars 51 are bonded to the heated preform 20, each support bar 51 is bonded along the length direction X of the shell 103. Adjacent support bars 51 are spaced apart from each other in the direction of extension of the curved surface of the shell 103. The support bars 51 can adopt a wooden square structure.

[0206] Optionally, the number and distribution of the support bars 51 may be determined according to the actual coverage area of ​​the heated preform 20 , and the present application does not impose any special limitation on the number of the support bars 51 .

[0207] When the binding portion 40 is used to bind the support strips 51, the binding portion 40 is in direct contact with the side of the support strips 51 facing away from the heated preform 20. After gradually tightening, the binding portion 40 provides a tightening force to the multiple support strips 51, and uses the support strips 51 to form an extrusion force on the heated preform 20, so that it is tightly bonded to the bonding portion 26.

[0208] An embodiment of the present application provides an installation method for a blade heating preform. The installation method provides another structural form of the crimping portion 50. By utilizing the structure of multiple support bars 51, it can better and more evenly contact the binding portion 40, so that the extrusion force on the heating preform 20 is more uniform, and has a better crimping effect.

[0209] As an optional embodiment, as shown in FIG18 , the support bar 51 includes a prism structure, and the cross-section of the support bar 51 in the thickness direction of the shell 103 is trapezoidal.

[0210] Taking into account that when the binding part 40 is used to bind the support bar 51, the binding part 40 will be in direct contact with the support bar 51, in order to protect the binding part 40 and prevent stress concentration from forming at the contact point between the binding part 40 and the support bar 51, causing the binding part 40 to break, in this embodiment, the cross-section of the support bar 51 is set to be trapezoidal, so that the contact position between the binding part 40 and the support bar 51 is a plane, reducing the stress in this part.

[0211] The installation method of the blade heating preform provided in the embodiment of the present application is such that the contact point between the binding portion 40 and the support bar 51 is a plane by setting the support bar 51 to a prism structure. During the tightening process of the binding portion 40, the breakage of the binding portion 40 caused by excessive stress at the local contact point is avoided, thereby providing better safety protection for the binding portion 40.

[0212] As an optional embodiment, please refer to Figure 19. In the direction from the leading edge 104 of the shell 103 to the trailing edge 105, the distance from one end of each of the multiple support bars 51 away from the shell 103 to the shell 103 is in a decreasing trend. The step of fixing the crimping portion 50 on the heating preform 20 using the binding portion 40 includes: using the binding portion 40 to contact each support bar 51 in turn in the direction from the leading edge 104 to the trailing edge 105 and crimping them on the heating preform 20.

[0213] Optionally, the heating preform 20 is usually bonded to the front edge 104 of the shell 103. Since multiple support strips 51 need to be bonded to the heating preform 20, the support strips 51 at the front edge 104 protrude from the shell 103. When bundling is performed using the binding portion 40, the support strip 51 closest to the front edge 104 will first contact the support strip 51 at this location.

[0214] In this embodiment, the thickness dimensions of the multiple support bars 51 are designed with differentiation, that is, the thickness of the support bars 51 gradually decreases from the leading edge 104 to the trailing edge 105, so that the support bars 51 at the leading edge 104 first contact with the binding portion 40 during bundling. The binding portion 40 will first squeeze the support bars 51 at the leading edge 104, and then gradually bind them toward the trailing edge 105, contacting and bundling the support bars 51 close to the trailing edge 105 in turn.

[0215] That is to say, when the binding part 40 is bundling, it first starts to squeeze the heated preform 20 at the front edge 104, and gradually squeezes the heated preform 20 at the rear edge 105. There is a sequence of pressing, and finally the heated preform 20 is pressed onto the shell 103 as a whole.

[0216] The installation method of the blade heating preform provided in the embodiment of the present application utilizes the differentiated design of the thickness of multiple support bars 51. During the binding process, the support bars 51 are contacted and squeezed in sequence from the leading edge 104 position to the trailing edge 105 position, making the pressing process of the heating preform 20 more uniform, ensuring uniform force everywhere.

[0217] As an optional embodiment, referring to FIG. 15 , the step of fixing the heated preform 20 on the housing 103 using the binding portion 40 includes:

[0218] The binding portion 40 is wrapped around the shell 103 along the chord direction of the shell 103 so that the binding portion 40 covers at least a portion of the heated preform 20 ;

[0219] The binding portion 40 is tightened, and the heated preform 20 is attached to the shell 103 via the adhesive portion 26 .

[0220] Optionally, in order to ensure that the binding portion 40 fully binds the heating preform 20 , the binding portion 40 may be wrapped around the shell 103 along the chord direction of the shell 103 , thereby binding the heating preform 20 to the shell 103 .

[0221] After bundling using the binding portion 40, the binding portion 40 can be tightened to form an extrusion pressure on the heated preform 20 to ensure that the heated preform 20 is fully bonded to the bonding portion 26. After tightening the binding portion 40, the entire structure is allowed to stand for a period of time so that the bonding between the heated preform 20 and the bonding portion 26 is more firmly established.

[0222] The installation method of the blade heating preform provided in the embodiment of the present application forms a tighter bond to the heating preform 20 by wrapping the binding portion 40 around the shell 103 and tightening the binding portion 40, thereby improving the stability of the bond between the heating preform 20 and the shell 103.

[0223] As an optional embodiment, referring to FIG. 16 , the step of wrapping the binding portion 40 around the shell 103 along the chord direction of the shell 103 comprises:

[0224] A tying portion 40 is provided, the tying portion 40 includes a plurality of tying strips 41;

[0225] A plurality of lashing strips 41 are sequentially wound around the shell 103 along the chord direction, and adjacent lashing strips 41 are spaced apart from each other in the length direction X of the shell 103 .

[0226] Optionally, the binding portion 40 can adopt a structural form of multiple binding strips 41. When using the binding portion 40 for binding, the binding strips 41 are used to wrap around the shell 103 in sequence in the length direction X of the shell 103, and adjacent binding strips 41 are spaced from each other in the length direction X.

[0227] In this embodiment, the number of binding strips 41 is determined based on the coverage of the heated preform 20 on the shell 103. At the same time, the uniformity of the spacing between the binding strips 41 must also be considered to ensure that the heated preform 20 at each location can be evenly stressed and bound.

[0228] Optionally, the spacing between adjacent binding strips 41 in the length direction X is usually 30 cm. This is mainly due to the fact that the binding strips 41 need to cover the entire heating preform 20 in consideration of the covering length of the heating preform 20 on the shell 103. At the same time, in order to ensure that each section of the heating preform 20 is force-bound and the force at each section is uniform, the force at each section is averaged by making the adjacent binding strips 41 equidistant, so that the heating preform 20 as a whole is firmly bonded to the shell 103.

[0229] The embodiment of the present application provides a method for installing a blade heating preform by using multiple binding strips 41 to wrap around the shell 103 to bundle the heating preform 20, fully covering the entire heating preform 20, ensuring that all parts of the preform can be evenly stressed and form a tight bond with the shell 103, preventing local detachment caused by unstable bonding, reducing the risk of heating and deicing failure, and having better reliability.

[0230] As an optional embodiment, the step of tightening the binding portion 40 and fitting the heated preform 20 to the shell 103 through the adhesive portion 26 includes: each binding strip 41 is contracted toward the shell 103 using its own tightener to bind the heated preform 20 to fit tightly to the shell 103.

[0231] The installation method of the blade heating preform provided in the embodiment of the present application provides a way to tighten the binding portion 40. By utilizing the tightener carried on each binding strip 41, each binding strip 41 is contracted toward the shell 103, thereby providing an extrusion force for the heating preform 20, and having a better tightening effect.

[0232] As an optional embodiment, after the step of fixing the heating preform 20 on the shell 103 using the binding portion 40 so that the heating preform 20 is in contact with the adhesive portion 26 , the installation method further includes: heating and curing the adhesive portion 26 .

[0233] After the heated preform 20 is tightly fitted to the shell 103 , the adhesive portion 26 needs to be cured so that the overall structure is made of a hard material with better structural stability. Usually, heating curing can be used to accelerate the curing speed of the adhesive portion 26 .

[0234] The present application does not impose any special restrictions on the curing method of the adhesive portion 26, and it can also be directly left to cure. After the adhesive portion 26 is cured, the heated preform 20 is now fixed on the shell 103, and the binding portion 40 can be removed to complete the bonding process of the heated preform 20.

[0235] The installation method of the blade heating preform provided in the embodiment of the present application heats and cures the adhesive portion 26, so that the heating preform 20 forms a more stable connection with the shell 103, further preventing the heating preform 20 from falling off, and having higher structural strength.

[0236] As an optional embodiment, the step of heating and curing the adhesive portion 26 includes:

[0237] An electric blanket is provided on the outer surface of the housing 103, and the electric blanket covers the adhesive portion 26 on the outer surface;

[0238] The electric blanket is powered on so that the temperature of the electric blanket is above a first threshold and continues to heat the adhesive portion 26 within a first preset time period.

[0239] Optionally, the first threshold value includes 70°C, and the first preset time period includes 5 hours. The first threshold value and the first preset time period depend on the material of the adhesive portion 26 . Different temperature values ​​and heating times are used for adhesive portions 26 made of different materials. This application does not impose any particular limitations on the specific values ​​of the first threshold value and the first preset time period.

[0240] The installation method of the blade heating preform provided in the embodiment of the present application provides a way to heat and cure the adhesive portion 26. By heating and curing the adhesive portion 26, a more stable connection is formed between the heating preform 20 and the shell 103, further preventing the heating preform 20 from falling off, and having higher structural strength.

[0241] As an optional embodiment, before providing the heating preform 20 and setting the adhesive portion 26 on at least one of the outer surface and the heating preform 20, the installation method further includes: polishing the outer surface.

[0242] Before setting the adhesive portion 26 on the outer surface of the shell 103 , in order to allow the adhesive portion 26 to better adhere to the outer surface, the outer surface can be polished to provide a clean and flat surface for the adhesive portion 26 to form a better bond with the shell 103 .

[0243] The installation method of the blade heating preform provided in the embodiment of the present application polishes the outer surface of the shell 103 to form a more stable bond between the bonding portion 26 and the shell 103, thereby improving the bonding ability of the bonding portion 26 and making the bonding between the heating preform 20 and the shell 103 more reliable.

[0244] As an optional embodiment, a heated preform 20 is provided, and the step of providing an adhesive portion 26 on at least one of the outer surface and the heated preform 20 includes:

[0245] Applying adhesive portion 26 on the outer surface;

[0246] The bonding portion 26 is ground flat so that the bonding portion 26 facing away from the surface of the housing 103 forms a flat surface and reaches a first predetermined thickness;

[0247] Alternatively, the adhesive portion 26 may be applied to the outer surface of the heated preform 20;

[0248] The bonding portion 26 is ground flat so that the bonding portion 26 close to the surface of the housing 103 forms a flat surface and the bonding portion 26 reaches a first predetermined thickness;

[0249] Alternatively, a first adhesive portion is provided on the outer surface of the heating preform 20 and a second adhesive portion is provided on the outer surface of the shell 103;

[0250] The surface of the first adhesive portion facing away from the heated preform 20 is ground flat, and the outer surface of the second adhesive portion facing away from the shell 103 is ground flat, so that the surfaces where the first adhesive portion and the second adhesive portion contact each other form a plane, and the first adhesive portion and the second adhesive portion constitute the adhesive portion 26, and the adhesive portion 26 reaches a first preset thickness.

[0251] Optionally, after the bonding portion 26 is provided on the outer surface of the shell 103 , the surface of the bonding portion 26 may be smoothed using a tool to make it have a smoother surface, which facilitates bonding of the heating preform 20 thereto.

[0252] Optionally, the first preset thickness range includes 2-5 mm. Controlling the thickness of the bonding portion 26 within this range can ensure bonding with the heated preform 20 while preventing unnecessary loss caused by excessive bonding portion 26, thereby meeting the basic bonding conditions for the heated preform 20.

[0253] The installation method of the blade heating preform provided in the embodiment of the present application adjusts the structure of the adhesive portion 26 so that it can better bond with the heating preform 20, thereby improving the reliability of the bonding with the heating preform 20.

[0254] As an optional embodiment, referring to FIG. 20 , the installation method provides a connecting portion 60 between the edge of the heating preform 20 and the shell 103 so that the heating preform 20 and the shell 103 are seamlessly bonded.

[0255] Optionally, the connecting portion 60 can be made of putty, mainly after the heating preform 20 is bonded to the shell 103, the connecting portion 60 is connected between the heating preform 20 and the shell 103. Its main function is to perform transition shaping on the corners of the heating preform 20 to form a better connection between the heating preform 20 and the shell 103.

[0256] The installation method of the blade heating preform provided in the embodiment of the present application forms a better connection between the heating preform 20 and the shell 103 by setting a connecting portion 60 at the edge of the heating preform 20, thereby improving the appearance of the overall structure while ensuring structural stability.

[0257] An embodiment of the present application provides a method for installing a blade heating preform, a blade, and a wind turbine generator set. The heating preform is bonded to the outer surface of the blade shell by using an adhesive portion, and the heating preform is fixed by using a binding portion, so that the heating preform is attached to the outer surface of the shell, thereby heating the blade shell by electric heating, thereby achieving the purpose of de-icing the shell surface. The installation method has simple steps, a simplified process flow, and reduced difficulty, which is conducive to the molding of the blade, facilitates the operation of the staff, and more efficiently realizes the de-icing performance of the blade itself. At the same time, the tools used in the method are simple, which reduces the process preparation cost and has better economic benefits.

[0258] Referring to FIG. 21 , an embodiment of the present application provides a method for installing a heating preform. Optionally, the blade heating preform is the heating preform 20 in the above embodiment. The method includes:

[0259] S1. Provide a housing 103, wherein the housing 103 has an inner cavity and includes an inner surface facing the inner cavity and an outer surface facing away from the inner cavity;

[0260] S2, providing a heated preform 20, and providing an adhesive portion 26 on at least one of the outer surface and the heated preform 20;

[0261] S3, bonding the heated preform 20 and the outer surface together through the bonding portion 26;

[0262] S4, covering the vacuum seal 70 on the side of the heated preform 20 facing away from the adhesive portion 26, so that a sealed cavity enclosing the heated preform 20 is formed between the vacuum seal 70 and the outer surface;

[0263] S5 , the sealed cavity is vacuumed, and the external atmospheric pressure squeezes the heated preform 20 through the vacuum seal 70 , so that the heated preform 20 is bonded to the outer surface through the bonding portion 26 .

[0264] In step S1 , the provided housing 103 is usually pre-formed by using a mold through a resin infusion process, and the initial housing 103 is obtained after the upper and lower molds are clamped.

[0265] Optionally, the shell 103 itself has an inner cavity, in which structures such as a web are usually provided to support the shell 103. The shell 103 has relative inner and outer surfaces after the mold is closed. The present application is directed to an installation method for bonding the heating preform 20 to the outer surface, and its purpose is to bond the heating preform 20 to the outer surface of the shell 103 to complete subsequent maintenance work.

[0266] Optionally, the heated preform 20 bonded in this embodiment belongs to a prefabricated structure, that is, the heated preform 20 and the shell 103 are two independent components. After being formed separately, the heated preform 20 is bonded to the outer surface of the shell 103 to form an integral blade structure.

[0267] In step S2, please refer to Figure 13. Optionally, an adhesive portion 26 can be set on the provided shell 103, or an adhesive portion 26 can be pre-set on the provided heating preform 20. The purpose is to bond the heating preform 20 to the outer surface of the shell 103. Optionally, the adhesive portion 26 can be made of a material such as structural adhesive, and the adhesive portion 26 is applied to the outer surface of the shell 103, specifically at the position to be bonded of the heating preform 20.

[0268] Then, in step S3 , referring to FIG. 14 , the prefabricated heating preform 20 is bonded to the outer surface via the middle bonding portion 26 , so that a preliminary connection is formed between the heating preform 20 and the housing 103 .

[0269] Optionally, according to different actual needs, heating preforms 20 of different areas can be bonded on the outer surface, so as to cover a larger area of ​​the outer surface to meet actual needs. The specific number and area need to be determined according to actual needs.

[0270] After the heating preform 20 is initially bonded to the shell 103, in step S4, please refer to Figure 22, the heating preform 20 is covered with a vacuum seal 70, thereby forming a sealed cavity with the shell 103. The heating preform 20 is in the sealed cavity. The function of the sealed cavity is to vacuum the sealed cavity in step S5. After the negative pressure is formed, the external atmospheric pressure squeezes the vacuum seal 70, and then squeezes the internal heating preform 20 onto the shell 103, completing the bonding process of the heating preform 20.

[0271] The installation method of the heating preform provided in the embodiment of the present application completes the sealing of the heating preform 20 pre-bonded to the shell 103 by arranging the vacuum seal 70 on the shell 103 and enclosing it with the outer surface to form a sealed cavity. In the subsequent process of evacuating the sealed cavity, the vacuum negative pressure in the sealed cavity is used to make the external atmospheric pressure squeeze the heating preform 20 in the cavity until the heating preform 20 is tightly fitted with the adhesive portion 26, so that the heating preform 20 is stably bonded to the shell 103, thereby completing the maintenance process of the blade. In this process, when the vacuum seal 70 is used to enclose the sealed cavity, it is only necessary to The sealing parts 75 are bonded on both sides upward to form a sealed cavity, and then the heating preform 20 is vacuumed using the vacuum seal 70, thereby avoiding bonding the shell 103 at multiple locations to form a sealed cavity during aerial operations, reducing the use of the sealing part 75, simplifying the process steps, reducing the process difficulty, and facilitating the use of the vacuum seal 70 to form a sealed cavity, which has higher efficiency in blade maintenance. At the same time, the principle of vacuum sealing extrusion is used to make the bonding of the heating preform 20 more sufficient to make the structure more reliable, and the bonding of the heating preform 20 has higher stability, reducing the risk of unstable structural bonding.

[0272] The installation method of the heating preform provided in the embodiment of the present application is to set up the heating preform 20 and use the vacuum formed by the above-mentioned vacuum seal 70 to bond the heating preform to the shell 103, so that the blade has the function of heating and deicing, which is convenient for maintenance in the freezing season.

[0273] As an optional embodiment, after the step of vacuuming the sealing cavity, the installation method further includes: heating and curing the adhesive portion 26 .

[0274] Considering that after the heated preform is bonded to the shell 103 by vacuuming, in order to improve the bonding stability between the preform and the shell 103, the bonding portion 26 between the two needs to be heated and cured so as to form a reliable bond between the two.

[0275] Optionally, the adhesive portion 26 may be heated by covering it with an electric blanket, for example, maintaining the temperature above 70° C. for more than 5 hours to achieve curing of the adhesive portion 26 . The present application does not impose any particular limitation on the specific curing method.

[0276] The installation method of the heating preform provided in the embodiment of the present application improves the stability of the bonding between the heating preform and the shell 103 by heating and curing the adhesive portion 26, has higher structural strength, and reduces the risk of the preform falling off during operation.

[0277] As an optional embodiment, referring to Figures 23 to 26 , the vacuum seal 70 includes a carrier film 73 and a connecting assembly. The connecting assembly is disposed on the carrier film 73 . The steps of enclosing the vacuum seal 70 on the side of the heated preform 20 facing away from the adhesive portion 26 and forming a sealed cavity between the vacuum seal 70 and the outer surface to enclose the heated preform 20 include:

[0278] S41, respectively providing sealing portions 75 on both sides of the heated preform 20 along the length direction of the shell 103, with the sealing portions 75 being provided around the outer surface along the chord direction of the shell 103;

[0279] S42, covering the heated preform 20 with a carrier film 73 and surrounding the outer surface along the chord direction, wherein the carrier film 73 is bonded to the outer surface via the sealing portion 75 to seal both sides of the heated preform 20 in the longitudinal direction;

[0280] S43 , wrapping the carrier film 73 around the outer surface on both sides in the chord direction and docking them together through a connecting assembly, so that the vacuum seal 70 forms a closed annular surface arranged around the shell 103 , and the closed annular surface and the outer surface enclose a sealed cavity.

[0281] In the process of forming a sealed cavity using a vacuum seal 70, specifically in step S41, please refer to Figure 25, first, a sealing portion 75 is set on both sides of the pre-bonded heating preform 20. Optionally, the sealing portion 75 can be made of sealant material, and the sealing portion 75 is set around the outer surface of the shell 103.

[0282] Then in step S42, the carrier film 73 of the vacuum seal 70 is covered on the outer surface and bonded to the shell 103 through the provided sealing portion 75, ensuring that the carrier film 73 is tightly fitted to the shell 103 at the sealing portion 75 to form a seal. In this way, both sides of the heated preform 20 in the length direction are sealed under the action of the carrier film 73 and the sealing portion 75.

[0283] On this basis, in step S43, please refer to Figure 26, continue to surround the shell 103 with the supporting film 73, so that it is connected end to end on both sides in the chord direction using connecting components. The connecting components play the role of connecting and sealing, and the final vacuum seal 70 forms a closed ring surface.

[0284] The specific structure of the sealed cavity is as follows: the supporting film 73 of the vacuum seal 70 covers the heated preform 20 and surrounds the outer surface of the shell 103. The supporting film 73 is bonded to the shell 103 on both sides in the length direction using the sealing portion 75 to form a seal. The connecting components on the supporting film 73 are then used to connect the end to end in the chord direction to finally form a closed annular surface and enclose the shell 103 to form a sealed cavity. The heated preform 20 is located in the sealed cavity.

[0285] The installation method of the heated preform provided in the embodiment of the present application provides a molding method for forming a sealed cavity on the shell 103 using a vacuum seal 70, which ensures the sealing effect of the sealed cavity and is beneficial to the subsequent vacuuming process of the sealed cavity. At the same time, in the process of forming the sealed cavity, a seal can be formed by only setting sealing parts 75 on both sides of the carrier film 73 in the length direction, thereby reducing the total number of sealing parts 75 set, thereby simplifying the process steps, making the operation process more convenient, reducing the labor workload during aerial operations, and improving the overall bonding efficiency.

[0286] As an optional embodiment, referring to Figures 24 to 26, the connecting assembly includes a first docking portion 71 and a second docking portion 72 provided on both sides of the carrier film 73 in the chord direction. The steps of wrapping the carrier film 73 around the outer surface on both sides in the chord direction and docking the two sides include:

[0287] One of the first docking portion 71 and the second docking portion 72 is moved around the outer surface relative to the other along the chord direction until the two are in contact;

[0288] The first docking portion 71 and the second docking portion 72 cooperate with each other to form a docking connection.

[0289] Optionally, the specific structure of the connecting component is a first docking portion 71 and a second docking portion 72 arranged on both sides of the supporting film 73. After the supporting film 73 is arranged around the shell 103, the first docking portion 71 and the second docking portion 72 are specifically docked with each other, so that the supporting film 73 forms a closed annular surface, thereby obtaining the final closed structure of the sealed cavity.

[0290] An embodiment of the present application provides a method for installing a heated preform. By utilizing the end-to-end docking of the first docking portion 71 and the second docking portion 72, the sealing cavity is sealed, which facilitates the staff to complete the sealing process of the sealing cavity. The structure is simple and easy to operate, and has high feasibility.

[0291] The structures of the first docking portion 71 and the second docking portion 72 can adopt various forms to ensure that a connection can be formed between the two to obtain a closed supporting film 73 connected end to end. Optionally, the first docking portion 71 and the second docking portion 72 respectively include a clamp chain structure, and the step of using the first docking portion 71 and the second docking portion 72 to cooperate with each other to form a connection includes: buckling the two clamp chain structures together.

[0292] The installation method of the heating preform provided in the embodiment of the present application is convenient for workers to connect the end to end of the carrier film 73 by setting the first docking part 71 and the second docking part 72 as a clamp chain structure, thereby improving the convenience of sealing and meeting the sealing requirements.

[0293] As an optional embodiment, please refer to Figure 24, the vacuum seal 70 includes an exhaust pump and an exhaust port 74 is provided on the surface of the vacuum seal 70, and the exhaust pump is plugged into the exhaust port 74. The step of vacuuming the sealed cavity includes: turning on the exhaust pump, and the exhaust pump discharges the internal air of the sealed cavity.

[0294] In this embodiment, the vacuum seal 70 is pre-set with an air extraction port 74, and an air extraction pump is plugged into the air extraction port 74. Optionally, the air extraction pump can be a micro pump. When the air extraction pump starts working, it can automatically extract air without the need for operator intervention or support from the work platform. The work platform can then be moved to another work area, thereby improving the utilization rate of the work platform.

[0295] After the shell 103 is surrounded by the vacuum seal 70 to form a sealed cavity, the vacuum pump carried by the vacuum seal 70 can be turned on to discharge the air in the sealed cavity through the vacuum port 74, thereby forming a vacuum negative pressure state in the sealed cavity. The vacuum seal 70 gradually squeezes the internal heating preform 20, causing it to bond with the shell 103.

[0296] The installation method of the heating preform provided in the embodiment of the present application provides an exhaust port 74 and an exhaust pump on the vacuum seal 70. After the sealed cavity is formed, the exhaust pump can be directly used to vacuum the sealed cavity, avoiding the need for subsequent external pipes and driving components, thereby reducing the space occupied by external equipment, saving more space on the work platform, providing sufficient space for staff to move around, and saving the staff's operation workload. At the same time, the vacuum seal 70 has a higher degree of integration, simplifies the process steps, reduces the process difficulty, and improves the overall maintenance efficiency.

[0297] As an optional embodiment, please refer to Figure 24, the vacuum seal 70 includes multiple vacuum pumps and a plurality of vacuum ports 74 are provided on the surface of the vacuum seal 70, and the multiple vacuum ports 74 are arranged at intervals from each other. The step of vacuuming the sealed cavity includes: turning on all the vacuum pumps at the same time to discharge the internal air of the sealed cavity.

[0298] Optionally, in this embodiment, a plurality of vacuum ports 74 and vacuum pumps are provided on the vacuum seal 70. After the sealed cavity is formed, all the vacuum pumps can be turned on simultaneously during the vacuuming process so that the sealed cavity can be evacuated at the same time, thereby speeding up the vacuuming rate.

[0299] The installation method of the heated preform provided in the embodiment of the present application increases the vacuum rate by arranging multiple vacuum pumps on the vacuum seal 70 and performing the vacuuming process simultaneously, thereby having higher exhaust efficiency, so that it can be extruded into the heated preform 20 more quickly.

[0300] As an optional embodiment, before providing the heated preform 20 and setting the adhesive portion 26 on at least one of the outer surface and the heated preform 20 , the preparation method further includes: polishing the outer surface.

[0301] Before setting the adhesive portion 26 on the outer surface of the shell 103 , in order to allow the adhesive portion 26 to better adhere to the outer surface, the outer surface can be polished to provide a clean and flat surface for the adhesive portion 26 to form a better bond with the shell 103 .

[0302] The blade preparation method provided in one embodiment of the present application polishes the outer surface of the shell 103 to form a more stable bond between the bonding portion 26 and the shell 103, thereby improving the bonding ability of the bonding portion 26 and making the bonding between the heated preform and the shell 103 more reliable.

[0303] As an optional embodiment, a heated preform 20 is provided, and the step of providing an adhesive portion 26 on at least one of the outer surface and the heated preform 20 includes:

[0304] Applying an adhesive portion 26 having a first predetermined thickness range on the outer surface;

[0305] The bonding portion 26 is ground flat so that the surface of the bonding portion 26 facing away from the housing 103 forms a flat surface.

[0306] Optionally, after the bonding portion 26 is provided on the outer surface of the shell 103 , the surface of the bonding portion 26 may be smoothed using a tool to make it have a smoother surface, which facilitates bonding of the heated preform thereto.

[0307] Optionally, the first preset thickness range includes 2-5 mm. Controlling the thickness of the bonding portion 26 within this range can ensure bonding with the heated preform while preventing unnecessary loss caused by excessive bonding portion 26, thereby meeting basic bonding conditions for the heated preform.

[0308] The method for preparing the blade provided in the embodiment of the present application adjusts the structure of the bonding portion 26 so that it can better bond with the heated preform, thereby improving the reliability of the bonding with the heated preform.

[0309] An embodiment of the present application provides a vacuum seal 70, please refer to Figure 24, including a carrier film 73 and a connecting component, the carrier film 73 has an exhaust port 74, and the vacuum seal 70 is exhausted through the exhaust port 74; the connecting component includes a first docking portion 71 and a second docking portion 72, and the first docking portion 71 and the second docking portion 72 are respectively arranged on both sides of the carrier film 73 in its own width direction; wherein, the vacuum seal 70 has a first state and a second state, in the first state, the first docking portion 71 and the second docking portion 72 are arranged relative to each other in the width direction; in the second state, the carrier film 73 is wound along the width direction and the first docking portion 71 and the second docking portion 72 are docked with each other, so that the carrier film 73 forms a closed ring surface.

[0310] Optionally, the width of one side of the carrier film 73 along its length is greater than the width of the other side. In the first state, the carrier film 73 has a trapezoidal structure. This is primarily because during the process of wrapping the shell 103 with the carrier film 73, the shell 103 gradually changes in size along its length, gradually shrinking from the blade root to the blade tip. To better adapt to the actual structure of the shell 103, the carrier film 73 is configured as a gradually changing trapezoidal structure in this embodiment.

[0311] Through the trapezoidal structure of the supporting film 73, its short side is close to the blade tip side and the long side is close to the blade root side, covering the shell 103, and finally forming a tight fit with the shell 103 at all positions of the shell 103, so that the sealing cavity has a better sealing effect.

[0312] Optionally, the vacuum seal 70 further includes an air pump, which is plugged into the air extraction port 74 . The air pump is configured to extract air from the closed annular surface of the carrier film 73 in the second state.

[0313] In this embodiment, the vacuum pump is integrated into the vacuum port 74 of the carrier film 73, so that the vacuum seal 70 forms an integrated structure with a vacuum pumping function, has the multifunctionality of vacuum pumping, avoids the process of external vacuum equipment, and has higher vacuuming efficiency.

[0314] Optionally, the first docking portion 71 and the second docking portion 72 include a clip-chain structure. In the second state, the first docking portion 71 and the second docking portion 72 are interlocked to form a docking connection. When the carrier film 73 is docked end to end around the housing 103, the clip-chain structure of the first docking portion 71 and the second docking portion 72 can be used to achieve docking. This simple structure facilitates the sealing of the sealed cavity.

[0315] Optionally, the carrier film 73 has a plurality of spaced apart exhaust ports 74. To increase the vacuuming rate of the sealed cavity, the plurality of exhaust ports 74 on the carrier film 73 can be used to simultaneously vacuum the sealed cavity, thereby increasing maintenance efficiency and speeding up the maintenance process.

[0316] An embodiment of the present application provides a method for installing a heating preform and a vacuum seal, which completes the sealing of the heating preform pre-bonded to the shell by arranging the vacuum seal on the shell and enclosing it with the outer surface to form a sealed cavity. In the subsequent process of evacuating the sealed cavity, the vacuum negative pressure in the sealed cavity is used to make the external atmospheric pressure squeeze the heating preform in the cavity until the heating preform is tightly fitted with the adhesive portion, so that the heating preform is stably bonded to the shell, thereby completing the maintenance process of the blade. The vacuum seal is used to vacuum the additional parts, which simplifies the process steps and has higher efficiency in the maintenance of the blade. At the same time, the principle of vacuum sealing extrusion is used to make the bonding of the heating preform more sufficient to make the structure more reliable. The bonding of the heating preform has higher stability, which reduces the risk of unstable structural bonding.

[0317] Those skilled in the art should understand that the above embodiments are exemplary rather than restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on a study of the drawings, specifications and claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other devices or steps; when an item is not modified by a quantifier, it is intended to include one / kind or more / kinds of items and can be used interchangeably with "one / kind or more / kinds of items"; the terms "first" and "second" are used to identify names rather than to indicate any specific order. Any figure marks in the claims should not be understood as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a separate hardware or software module. The fact that certain technical features appear in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A heating preform for heating the blades of a wind turbine generator, wherein, The heating preform (20) comprises a heating portion (21) and a first protective portion (23), wherein the first protective portion (23) is stacked with the heating portion (21) and covers the heating portion (21), the heating preform (20) is connected to the blade (100) via the heating portion (21), and the heating portion (21) is configured to provide heat to the blade (100).

2. The heated preform according to claim 1, wherein, The heating preform (20) further comprises a first connecting portion (22), wherein the first connecting portion (22) is stacked and arranged on a side of the heating portion (21) facing away from the first protective portion (23).

3. The heated preform according to claim 2, wherein, The first protection part (23) and the first connection part (22) include glass cloth, and the heating part (21) includes a resistance wire.

4. The heating preform according to claim 1 further comprises a conductive preform (30), wherein the conductive preform (30) comprises a conductive portion and a second protective portion, wherein the second protective portion is stacked with the conductive portion and covers the conductive portion, and the conductive portion is configured to be connected to the heating preform (20) and transmit current.

5. The heated preform according to claim 4, wherein, The conductive preform (30) further comprises a second connecting portion, which is stacked on a side of the conductive portion away from the second protective portion, the second protective portion and the second connecting portion comprise glass cloth, and the conductive portion comprises a wire.

6. A heating unit for heating a shell (100) of a blade of a wind turbine generator set, the shell (100) comprising a first area (106) and a second area (107), the first area (106) comprising a windward area, and the second area (107) comprising a leeward area; Among them, The heating unit (21) comprises: A first heating section (211) and a second heating section (212) are arranged at intervals, wherein the first heating section (211) is arranged in the first area (106) and the second heating section (212) is arranged in the second area (107).

7. The heating unit according to claim 6, wherein, The thermal power density of the first heating section (211) is greater than the thermal power density of the second heating section (212).

8. The heating unit according to claim 6, wherein The first heating section (211) and / or the second heating section (212) comprises a plurality of heating subsections (213), and the plurality of heating subsections (213) are connected in series.

9. The heating unit according to claim 7, wherein, The first heating section (211) and / or the second heating section (212) comprises a plurality of heating segments (213), wherein the plurality of heating segments (213) are arranged at intervals along the length direction of the blade, and in a direction from the blade root (101) to the blade tip (102) of the blade, the thermal power density of the plurality of heating segments (213) gradually increases.

10. A deicing device, comprising a plurality of heating preforms (20) according to any one of claims 1 to 5, wherein the plurality of heating preforms (20) are connected in parallel, or comprising a plurality of heating units (21) according to any one of claims 7 to 9, wherein the plurality of heating units (21) are connected in parallel.

11. A method for installing a heated prefabricated component, comprising: Provide a housing (103), wherein the housing (103) has an inner cavity, and the housing (103) includes an inner surface facing the inner cavity and an outer surface facing away from the inner cavity; Provide a heating preform (20), and a bonding portion (26) is provided on at least one of the outer surface and the heating preform (20), and the heating preform (20) is configured to provide heat to the housing (103); Bond the heating preform (20) to the outer surface through the bonding portion (26); and Fix the heating preform (20) on the housing (103) by using a lashing portion (40) so that the heating preform (20) fits against the outer surface of the housing (103) through the bonding portion (26).

12. The installation method according to claim 11, wherein, Before the heating preform (20) is fixed on the housing (103) by using the lashing portion (40) so that the heating preform (20) fits against the outer surface of the housing (103) through the bonding portion (26), the installation method further includes: Providing a crimping portion (50) on a side of the heating preform (20) facing away from the bonding portion (26).

13. According to the installation method described in claim 12, wherein, The fixing of the heating preform (20) on the housing (103) by using the lashing portion (40) so that the heating preform (20) fits against the outer surface of the housing (103) through the bonding portion (26) includes: Covering at least a part of the crimping portion (50) with the lashing portion (40); and Fixing the crimping portion (50) on the heating preform (20) by using the lashing portion (40) so that the crimping portion (50) presses the heating preform (30) against the bonding portion (26).

14. The installation method according to claim 12, wherein, The providing of the crimping portion (50) on a side of the heating preform (20) facing away from the bonding portion (26) includes: Providing the crimping portion (50), and the crimping portion (50) includes a plurality of support bars (51); and Bonding each of the support bars (51) to the heating preform (20) along the length direction (X) of the housing (103) respectively, and adjacent support bars (51) are arranged at intervals in the curved surface extension direction of the housing (103).

15. The installation method according to claim 11, wherein, After the heating preform (20) is fixed on the housing (103) by using the lashing portion (40) so that the heating preform (20) fits against the bonding portion (26), the installation method further includes: heating and curing the bonding portion (26).

16. The installation method according to claim 15, wherein, The heating and curing of the bonding portion (26) includes: Providing an electric heating blanket on the outer surface of the housing (103), and the electric heating blanket covers the bonding portion (26) on the outer surface; and Powering on the electric heating blanket so that the temperature of the electric heating blanket is above a first threshold and continuously heats the bonding portion (26) within a first preset time period.

17. An installation method for a blade heating preform, including: Provide a housing (103) having an inner cavity, the housing (103) including an inner surface facing the inner cavity and an outer surface facing away from the inner cavity; Provide a heating preform (20), and provide an adhesive portion (26) on at least one of the outer surface and the heating preform (20); Bond the heating preform (20) and the outer surface together through the adhesive portion (26); Cover a vacuum seal (70) on a side of the heating preform (20) facing away from the adhesive portion (26), and form a sealed cavity enclosing the heating preform (20) between the vacuum seal (70) and the outer surface; and Perform a vacuum pumping process on the sealed cavity, and the external atmospheric pressure presses the heating preform (20) through the vacuum seal (70), so that the heating preform (20) is bonded to the outer surface through the adhesive portion (26).

18. The installation method according to claim 17, wherein, After the step of performing the vacuum pumping process on the sealed cavity, the installation method further includes: heating and curing the adhesive portion (26).

19. The installation method according to claim 17, wherein, The vacuum seal (70) includes a carrier film (73) and a connection assembly, and the connection assembly is disposed on the carrier film (73); The step of covering the vacuum seal (70) on a side of the heating preform (20) facing away from the adhesive portion (26) and forming a sealed cavity enclosing the heating preform (20) between the vacuum seal (70) and the outer surface includes: Provide sealing portions (75) on both sides of the heating preform (20) in the length direction of the housing (103), and the sealing portions (75) are disposed around the outer surface in the circumferential direction of the housing (103); Cover the carrier film (73) on the heating preform (20) and dispose it around the outer surface in the circumferential direction, and the carrier film (73) is bonded to the outer surface through the sealing portions (75) to seal both sides of the heating preform (20) in the length direction; and Dock both sides of the carrier film (73) in the circumferential direction around the outer surface through the connection assembly, so that the vacuum seal (70) forms a closed toroidal surface disposed around the housing (103), and the closed toroidal surface and the outer surface enclose the sealed cavity.

20. A blade, wherein, An ice removal device installed by using the heating preform according to any one of claims 1-5, or the heating portion according to any one of claims 6-9, or the installation method according to any one of 11-16 is provided on the blade, or the blade is maintained according to the installation method according to any one of claims 17-19.

21. A wind power generating set, wherein, The wind turbine generator set includes a blade as claimed in claim 20.

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