Blade with rain shield, method of manufacture, and wind turbine

Abstract

The application provides a blade with a rain cover, a manufacturing method and a wind turbine, and belongs to the technical field of fan blades. The blade comprises: a blade body, a target mounting area prepared in advance is arranged on a blade root section of the blade body; a rain cover arranged on the target mounting area prepared in advance of the blade body; a reinforcing mechanism arranged on the blade body and fixedly connected with the rain cover, used for increasing the structural strength between the rain cover and the blade body; the reinforcing mechanism comprises: a ring-shaped connecting plate arranged on the blade body; a plurality of connecting pieces arranged at intervals on the ring-shaped connecting plate and having an included angle with the ring-shaped connecting plate, and each connecting piece is fixedly connected with the rain cover. The application has the advantages of accurate installation positioning, simple structure, high stability and effective rain prevention.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fan blades, in particular to a blade with a rain cover, a manufacturing method of the blade with the rain cover and a wind turbine generator. BACKGROUND

[0002] As one of clean and renewable energy, wind energy has unique advantages of large single machine capacity and relatively mature technology. Compared with nuclear energy, wind energy has higher safety; compared with water energy, wind energy has greater development potential; compared with solar energy, wind energy has lower development cost. The installed capacity of wind turbine generators is gradually increasing.

[0003] In a wind turbine generator set, a wind power blade is an important device for converting wind energy into electrical energy. The wind turbine generator set usually operates in complex and harsh conditions, and often encounters strong rainfall and other weather conditions during use. At present, in order to avoid the damage of rainwater flowing into the hub and causing mechanical and electrical components to be damaged and other problems, a rain cover is usually installed on the wind power blade. The rain cover of the blade matches the hub cover of the whole machine, and protects the electrical components from being damaged by rainwater and the like. However, the current rain cover installation generally adopts manual or tool positioning, and then adopts the method of bonding with adhesive for installation. Manual positioning often has inaccurate positioning size, and subsequent rain cover installation positioning may have certain deviation. If the deviation is large, it may cause improper matching with the hub cover, and may cause rain leakage or interference and other problems. In addition, tool positioning also has certain disadvantages. Due to the difference in the size of the blade root airfoil pitch circle of different blades, various specifications of tooling need to be prepared. Especially with the acceleration of the current blade model update and replacement frequency, tooling suitable for installation of rain cover of a single type of blade will inevitably cause waste of resources and cannot meet the requirements. In the prior art, the following patents relate to the installation of the rain cover of the wind power blade: Patent CN220599937U discloses an installation device for the rain cover of the wind power blade. The installation device has the effects of convenient and rapid assembly and positioning installation, by means of the setting of the adjusting box, the positioning block, the round rod, the oval block, the positioning cylinder, the limiting spring, the positioning rod, the horizontal plate and the limiting rod. However, the installation device has a complex structure, and the actual operability is not strong, and cannot meet the installation requirements of various models. Patent CN217440220U discloses a rain cover, a wind power blade and a wind turbine generator set. The rain cover includes a plurality of rain cover units, a connecting piece and a fastener. The rain cover is formed by splicing the plurality of rain cover units into a closed ring-shaped cover body through the connecting piece. By adjusting the position of the fastener in the waist-shaped hole, the inner diameter of the ring-shaped cover body is changed, and the adaptability and adaptive assembly of the rain cover are realized by matching the root size of different wind power blades. However, the method has a complex and trivial structure, and the shape of the rain cover cannot be effectively guaranteed during the splicing process of the plurality of rain cover units. Therefore, accurate positioning and installation cannot be realized. Patent CN109268218A discloses a rain cover for a wind power blade, a wind turbine generator set and a rain cover installation method thereof. The patent mainly realizes complete sealing of the hub cover and the blade by the guide rails on both sides or one side of the main body of the rain cover, and realizes smooth relative rotation, in order to improve the sealing performance and matching performance of the rain cover and the hub cover. However, the guide rails and the sliding blocks are complex, and the actual guide rail positioning is not easy to operate, which leads to the fact that the actual effect cannot reach the expected effect.

[0004] Therefore, the current rain cover installation tool structure or process is complex, cannot meet the accurate positioning and installation requirements of various models, and has installation errors when the manual method is used. Rain leakage and interference problems may occur. SUMMARY

[0005] The embodiment of the present application aims to provide a blade with a rain cover, a manufacturing method and a wind turbine, so as to solve the problems of complex tool structure or process during installation of the rain cover, failure to meet requirements of various models, installation errors, rain leakage and interference.

[0006] In order to achieve the above-mentioned purpose, in a first aspect, the embodiment of the present application provides a blade with a rain cover, the blade comprising:

[0007] a blade body, a target installation area being provided on a root section of the blade body;

[0008] a rain cover being provided on the target installation area of the blade body;

[0009] a reinforcing mechanism being provided on the blade body and fixedly connected with the rain cover, and used for increasing structural strength between the rain cover and the blade body;

[0010] the reinforcing mechanism comprises:

[0011] a ring-shaped connecting plate being provided on the blade body;

[0012] a plurality of connecting pieces being provided on the ring-shaped connecting plate and having an included angle with the ring-shaped connecting plate, and each of the connecting pieces being fixedly connected with the rain cover.

[0013] Optionally, the rain cover is composed of a ring-shaped installation part, a connecting part and a rainproof part which are sequentially connected;

[0014] the ring-shaped installation part is installed on the target installation area of the blade body and is assembled with an outer surface of the blade body;

[0015] the connecting part and the rainproof part form a containing space with the blade body, the reinforcing mechanism is located in the containing space, and the connecting part is connected with the connecting pieces of the reinforcing mechanism.

[0016] Optionally, the ring-shaped installation part is fixedly connected with the blade body by adhesion.

[0017] Optionally, the included angle between the connecting pieces and the ring-shaped connecting plate is a complementary angle of the included angle between the ring-shaped installation part and the connecting part.

[0018] Optionally, a net pattern is provided on a surface of the rain cover connected with the connecting pieces, so as to increase the contact area.

[0019] In a second aspect, the embodiments of the present application further provide a manufacturing method of a blade with a rain cover, for manufacturing the blade with the rain cover as described above, the method comprising:

[0020] In step S1, a rain cover installation position mark with a preset depth is determined on the blade male mold according to a theoretical installation position of the rain cover, and a blade female mold is turned on the blade male mold to obtain a blade forming mold, the blade forming mold having a reinforcing mechanism installation area and a positioning line, the positioning line being used to form a target installation area on the blade during a blade forming process;

[0021] In step S2, a release agent is applied and a release cloth is laid on the blade forming mold;

[0022] In step S3, after laying a layer of release cloth on the reinforcing mechanism installation area of the blade forming mold, the reinforcing mechanism is laid in the reinforcing mechanism installation area, and a polytetrafluoroethylene film or a vacuum bag film is laid on the area where the connecting piece of the reinforcing mechanism is located, and the connecting piece layer is wrapped to form a sealed space;

[0023] In step S4, a blade lay-up is laid on the blade forming mold, and a release cloth, an isolation film, a flow guide net, a bonding vacuum bag film, a plug-in air pipe and a glue inlet pipe are laid on the lay-up;

[0024] In step S5, the blade is formed by using a vacuum infusion process, and the blade is demolded after a first preset time period;

[0025] In step S6, the connecting piece of the reinforcing mechanism is unfolded to a preset angle;

[0026] In step S7, the rain cover is fixed on the target installation area prepared in advance, and the connecting piece is fixedly connected with the rain cover.

[0027] Optionally, in step S2, the release agent is applied and the release cloth is laid on the blade forming mold, comprising:

[0028] In step S21, the release agent is applied on the blade forming mold;

[0029] In step S22, after a second preset time period from the time when the release agent is applied, the release cloth is laid on the blade forming mold.

[0030] Optionally, in step S2, the release agent is applied and the release cloth is laid on the blade forming mold, comprising:

[0031] In step S21, the release agent is applied on the blade forming mold;

[0032] In step S22, after the release agent forms a film, the release cloth is laid on the blade forming mold.

[0033] Optionally, in step S3, the reinforcing mechanism is placed in front of the reinforcing mechanism mounting area, and the method further comprises:

[0034] The connecting piece of the reinforcing mechanism is wrapped with a polytetrafluoroethylene film or a vacuum bag film.

[0035] In a third aspect, the embodiment of the present application also provides a wind turbine, comprising the blade with the rain cover as described above.

[0036] The technical solution of the present application forms a target mounting area on the blade body during the manufacturing of the blade body to indicate the installation position of the rain cover, ensures the accuracy of the installation position, and increases the structural strength of the connecting part by setting the reinforcing mechanism to improve the service life, has a simple overall structure, high stability, effectively improves the strength and reliability of the hub cover assembly, and avoids the risks of rain leakage and interference.

[0037] Other features and advantages of the embodiment of the present application will be described in detail in the following specific implementation part. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings are used to provide a further understanding of the embodiment of the present application, and constitute a part of the specification, and are used to explain the embodiment of the present application together with the following specific implementation, but do not constitute a limitation on the embodiment of the present application. In the drawings:

[0039] Figure 1 is a structural schematic diagram of the blade with the rain cover provided by the present application;

[0040] Figure 2 is a front view of the blade with the rain cover provided by the present application;

[0041] Figure 3 is a structural schematic diagram of the rain cover provided by the present application;

[0042] Figure 4 is a structural schematic diagram of the reinforcing mechanism provided by the present application;

[0043] Figure 5 is a flowchart of the manufacturing method of the blade with the rain cover provided by the present application.

[0044] EXPLANATION OF REFERENCE NUMERALS

[0045] 1 - blade body; 2 - rain cover; 21 - annular mounting part

[0046] 22 - connecting part; 23 - rainproof part; 3 - reinforcing mechanism

[0047] 31 - annular connecting plate; 32 - connecting piece. DETAILED DESCRIPTION

[0048] The specific embodiments of the present application will be described in detail hereinafter with reference to the drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory and are not intended to limit the present application.

[0049] In the embodiments of the present application, the orientation words such as "upper", "lower", "left", "right" used without the contrary description generally refer to the orientation or position relationship shown in the drawings or the orientation or position relationship commonly used when the product is used.

[0050] The terms "first", "second", "third" and the like are only used for description and cannot be understood as indicating or implying relative importance.

[0051] The terms "parallel", "vertical" and the like do not mean that the components must be absolutely parallel or vertical, but can be slightly inclined. For example, "parallel" only means that its direction is relatively more parallel to "vertical", and does not mean that the structure must be completely parallel, but can be slightly inclined.

[0052] The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal, vertical or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0053] In addition, the terms "approximately", "substantially" and the like are intended to describe the relevant content and not to require absolute accuracy, but there can be some deviation. For example, "approximately equal" does not mean only absolute equality, because in actual production and operation process, it is difficult to achieve absolute "equality", and generally there is a certain deviation. Therefore, in addition to absolute equality, "approximately equal" also includes the above-mentioned case of having a certain deviation. For example, in other cases, unless otherwise specified, the terms "approximately" and "substantially" have similar meanings as described above.

[0054] In the description of the present application, it should be further pointed out that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] Figure 1 is a structural schematic view of a blade with a rain cover provided by the present application; Figure 2 is a front view of a blade with a rain cover provided by the present application; Figure 3is a structural schematic view of a rain cover provided by the present application; Figure 4 is a structural schematic view of a reinforcing mechanism provided by the present application; Figure 5 is a flow chart of a manufacturing method of a blade with a rain cover provided by the present application.

[0056] As shown in Figures 1-4 , the embodiment provides a blade with a rain cover, which comprises:

[0057] a blade body 1, which is provided with a pre-prepared target mounting area on a blade root section;

[0058] a rain cover 2, which is arranged on the pre-prepared target mounting area of the blade body 1;

[0059] a reinforcing mechanism 3, which is arranged on the blade body 1 and fixedly connected with the rain cover 2, and used for increasing the structural strength between the rain cover 2 and the blade body 1;

[0060] The reinforcing mechanism 3 comprises:

[0061] a ring-shaped connecting plate 31, which is arranged on the blade body 1;

[0062] a plurality of connecting pieces 32, which are arranged on the ring-shaped connecting plate 31 at intervals and have an included angle with the ring-shaped connecting plate 31, and each of the connecting pieces 32 is fixedly connected with the rain cover 2.

[0063] Specifically, in the embodiment, the target mounting area is formed on the blade when the blade is shaped, so as to guide the position when the rain cover 2 is subsequently mounted, to ensure the accuracy of the mounting position, and to ensure the rain prevention and avoid interference and the like. In addition, since the working environment of the blade is relatively harsh, the reinforcing mechanism 3 is arranged to connect the rain cover 2 and the blade body 1, so as to ensure the overall strength of the connecting part and improve the service life. According to the shape structure of the blade, the reinforcing mechanism 3 is arranged to comprise the ring-shaped connecting plate 31 and the plurality of connecting pieces 32, the ring-shaped connecting plate 31 is sleeved on the blade body 1 and can be integrally formed with the blade or fixed by pasting; the connecting pieces 32 are arranged in plurality, which can be determined according to the use environment, and generally, the more the connecting pieces 32, the greater the structural strength.

[0064] Further, in the embodiment, the rain cover 2 is arranged to comprise a ring-shaped mounting portion 21, a connecting portion 22 and a rain-preventing portion 23 which are sequentially connected;

[0065] the ring-shaped mounting portion 21 is subsequently mounted on the pre-prepared target mounting area of the blade body and assembled with the outer surface of the blade body 1;

[0066] The connecting portion 22 and the rainproof portion 23 form a containing space with the blade body 1, the reinforcing mechanism 3 is located in the containing space, and the connecting portion 22 is connected with the connecting sheet 32 of the reinforcing mechanism 3.

[0067] Specifically, the connecting portion 22 can have a certain included angle with the annular mounting portion 21, or can be directly vertically arranged.

[0068] In an embodiment, the annular mounting portion 21 and the rainproof portion 23 adopt a hollow cylindrical thin-walled structure, the diameter of the annular mounting portion 21 is smaller than the diameter of the rainproof portion 23, and the connecting portion 22 adopts an internally hollow variable-diameter pipe structure.

[0069] In an embodiment, the annular mounting portion 21 adopts a hollow cylindrical thin-walled structure, and the rainproof portion 23 and the connecting portion 22 adopt an internally hollow variable-diameter pipe structure.

[0070] Further, the annular mounting portion 21 is fixed with the blade body 1 by pasting or hand laying.

[0071] Specifically, in the embodiment, the connection is stable, the operation is convenient, and the cost is low by the pasting mode.

[0072] Further, the included angle between the connecting sheet 32 and the annular connecting plate 31 is a complementary angle to the included angle between the annular mounting portion 21 and the connecting portion 22.

[0073] Specifically, in the embodiment, the included angle between the connecting sheet 32 and the annular connecting plate 31 is a complementary angle to the included angle between the annular mounting portion 21 and the connecting portion 22, so that the connecting sheet 32 and the connecting portion 22 are parallel to each other, the contact area of the part can be ensured, and thus the structural strength of the connecting part is enhanced and the service life is improved.

[0074] Further, a mesh pattern is arranged on the surface of the rainproof cover 2 connected with the connecting sheet 32, and the connecting part is in contact with each other when the connecting sheet 32 is connected with the rainproof cover 2. Therefore, the mesh pattern arranged on the surface of the rainproof cover 2 connected with the connecting sheet 32 can increase the contact area and ensure the bonding effect.

[0075] As shown in Figure 5 The embodiment provides a manufacturing method of a blade with a rainproof cover, which is used for manufacturing the blade with the rainproof cover, and the method comprises the following steps:

[0076] Step S1, according to the theoretical installation position of the rain cover, determine the rain cover installation position mark with a preset depth on the blade male mold, and perform the turning of the blade female mold mold on the blade male mold to obtain a blade forming mold, the blade forming mold has a reinforcing mechanism installation area and a positioning line, the positioning line is used to form a target installation area on the blade during the blade forming process;

[0077] Step S2, apply a release agent and lay a release cloth on the blade forming mold;

[0078] Step S3, lay a layer of release cloth on the reinforcing mechanism installation area of the blade forming mold, so that the surface of the subsequently formed annular reinforcing plate becomes a rough bonding surface, which is beneficial for bonding. Then lay the reinforcing mechanism in the reinforcing mechanism installation area, and lay a polytetrafluoroethylene film or a vacuum bag film on the area where the connecting piece of the reinforcing mechanism is located, and wrap the connecting piece layer area with the polytetrafluoroethylene film or the vacuum bag film, so that the connecting piece layer area forms a closed space;

[0079] Step S4, lay the blade layer on the blade forming mold, and lay the release cloth, the isolation film, the flow guide net, the bonding vacuum bag film, the plug-in air pipe and the glue inlet pipe on the layer;

[0080] Step S5, perform blade forming by using a vacuum infusion process, and perform blade demolding after a first preset time;

[0081] Step S6, unfold the connecting piece of the reinforcing mechanism to a preset angle;

[0082] Step S7, fix the rain cover in the target installation area prepared in advance, and fix the connecting piece with the rain cover.

[0083] Specifically, in the process of manufacturing the blade mold, according to the positions of the rain cover and the reinforcing mechanism, make installation position marks of the rain cover and the reinforcing mechanism on the male mold area, and consider a certain thickness, and then perform the turning of the blade female mold mold on the male mold. Through the positioning marks, the blade mold thus turned has clear positioning lines and reinforcing mechanism installation areas at the positions of the rain cover installation.

[0084] In one embodiment, steps S2-S7 specifically include: applying a layer of release agent in the mold, after drying, then laying a layer of release cloth in the area of the mold with the positioning line, laying a layer of annular release cloth at the position of the reinforcing mechanism, then laying a layer of polytetrafluoroethylene film or vacuum bag film at the position of the connecting piece of the reinforcing mechanism, then laying the reinforcing mechanism such as the biaxial cloth annular structure and its connecting piece on the mold in turn, and wrapping the connecting piece of the reinforcing mechanism with the polytetrafluoroethylene film or the vacuum bag film, so that each connecting piece area forms a closed space, and then laying the normal blade layer on top.

[0085] Secondly, the plurality of connecting pieces of the reinforcing mechanism are unfolded and folded outwards and upwards along the thickness direction of the blade before the mold is removed and before painting. The prefabricated rain cover is positioned according to the positioning position, and then the plurality of connecting pieces of the erected reinforcing mechanism and the rain cover are bonded together to make the reinforcing mechanism and the prefabricated rain cover into an integrated body, which becomes the reinforcing mechanism of the rain cover. Then, the prefabricated rain cover is installed and locked along the pre-formed positioning position of the outer surface of the blade by using the adhesive and the shrinkage tape, so as to realize the accurate positioning and installation of the rain cover.

[0086] In an embodiment, the step S2 of applying the release agent and laying the release cloth on the blade forming mold comprises:

[0087] Step S21, applying the release agent on the blade forming mold;

[0088] Step S22, laying the release cloth on the blade forming mold at the subsequent bonding position after a second preset time period from the time when the release agent is applied.

[0089] The drying time can be set according to the specification or experience, and the release cloth is laid after drying for a certain time.

[0090] In another embodiment, the step S2 of applying the release agent and laying the release cloth on the blade forming mold comprises:

[0091] Step S21, applying the release agent on the blade forming mold;

[0092] Step S22, laying the release cloth on the blade forming mold after the release agent is formed into a film.

[0093] Specifically, after the release agent is applied on the blade forming mold, in order to ensure the release effect, the release cloth can be laid at the subsequent bonding position only after the surface of the release agent is dried and formed into a film, therefore, the determination is directly made according to the experience.

[0094] Further, before the reinforcing mechanism is placed in the reinforcing mechanism installation area in step S3, the method further comprises:

[0095] A layer of release cloth is laid on the reinforcing mechanism laying area of the blade forming mold; polytetrafluoroethylene film is laid on the connecting piece area of the reinforcing mechanism, and the connecting piece laying layer of the reinforcing mechanism is subsequently wrapped, so as to form a closed space in the connecting piece laying area and avoid resin from infiltrating into the connecting piece during the blade pouring process.

[0096] The embodiment provides a wind turbine, which comprises the blade with the rain cover.

[0097] Embodiment 1:

[0098] Firstly, during the manufacturing process of the blade mold, according to the position of the rain cover and the area of 805-900mm requirement, the position of the rain cover is installed in the male mold area, the distance is measured from the blade root and the positioning line of 805mm and 900mm is drawn, with a certain thickness of 0.59mm, and then the turning of the blade female mold is carried out on the male mold. The female mold turned by the male mold has a clear positioning line depth of about 0.59mm at the position of the rain cover installation. Secondly, a layer of release agent is applied in the blade mold, and after drying, a layer of release cloth is laid in the area of the mold with 805mm-900mm positioning line, and then a layer of polytetrafluoroethylene film or vacuum bag film is laid in the connecting piece position of the reinforcing mechanism in turn, and then the reinforcing mechanism layer is laid on the mold in turn, the double-axial cloth 2AX800, the laying sequence is 3 layers ±45°, among them the connecting piece length of the double-axial reinforcing mechanism is 100mm, then the connecting piece layer of the reinforcing mechanism is wrapped with polytetrafluoroethylene film or vacuum bag film, so that the connecting piece layer forms a closed space. Then the normal blade layer is laid on it, after the completion of the laying, the release cloth, isolation film and flow guide net are laid on the laying structure in turn; the vacuum bag film is bonded, the air pipe and the glue pipe are inserted, and the epoxy resin system is introduced into the laying by vacuum infusion process. After curing, demolding. Among them, the annular connecting plate 31 of the reinforcing mechanism and the blade are cured into one body.

[0099] Then, after the mold is removed, the reinforcing mechanism is protected from being painted, the connecting piece 32 of the reinforcing mechanism without pouring resin is unfolded and erected along the thickness direction of the blade outward and upward. Then, on the positioning position 805-900mm of the blade forming, polyurethane or epoxy resin adhesive is applied, the part of the prefabricated rain cover is installed by using the retraction belt, and then the connecting piece of the reinforcing mechanism is installed on the vertical surface of the prefabricated rain cover by hand lay-up process, as the rain cover reinforcing mechanism, and the positioning area is formed together, which can realize the accurate positioning and installation of the rain cover.

[0100] Example 2:

[0101] In the manufacturing process of the blade mold, according to the position and area of 700mm-900mm required by the rain cover installation, the rain cover installation position is prepared in the male mold area, the distance is measured from the blade root and the positioning lines of 700mm and 900mm are drawn, and according to the positioning requirements of different rain covers of the whole machine, a plurality of positioning lines can be copied and marked. There is a certain thickness of 0.2mm, and then the female mold of the blade mold is copied on the male mold. The female mold copied through the male mold has a clear positioning line depth of about 0.2mm at the installation position of the rain cover. Secondly, a layer of release agent is applied in the blade mold, and after drying, a layer of release cloth is laid in the area of the 700mm-900mm positioning line in the mold, and then a layer of polytetrafluoroethylene film or vacuum bag film is laid in the connecting piece position of the reinforcing mechanism in turn, and then the reinforcing mechanism is laid in turn according to the shape of the cutting layer on the mold, and the three-axis cloth 3AX973 is laid in turn. The laying sequence is 4 layers ±45 / 0°, and the connecting piece length of the three-axis reinforcing mechanism is 85mm, and then the connecting piece layer of the reinforcing mechanism is wrapped with polytetrafluoroethylene film or vacuum bag film to form a closed space. Then lay the normal blade layer on top. After the laying is completed, release cloth, isolation film and flow guide net are laid in turn on the laying structure; vacuum bag film, air pipe and glue pipe are bonded in turn, and the epoxy resin system is introduced into the laying layer by vacuum infusion process. After curing, demoulding. The annular connecting plate 31 of the reinforcing mechanism and the blade are cured together as a whole.

[0102] Then, after demoulding, the reinforcing mechanism is protected from painting, and the multiple connecting pieces 32 of the reinforcing mechanism without pouring resin are unfolded and erected along the thickness direction of the blade outward and upward. Then, at the positioning position 700-900mm of the blade forming, polyurethane or epoxy resin adhesive is applied, the rain cover is installed by using the retracted belt, and then the multiple connecting pieces of the reinforcing mechanism are installed on the vertical surface of the preformed rain cover by hand lay-up process as the rain cover reinforcing mechanism together with the positioning area of the forming, so that the accurate positioning and installation of the rain cover are realized.

[0103] The resin is epoxy resin or polyurethane resin.

[0104] The above describes the optional implementation of the embodiments of the application in detail in combination with the drawings, but the embodiments of the application are not limited to the specific details in the above implementation, and various simple modifications can be made to the technical solutions of the embodiments of the application within the technical concept of the embodiments of the application, and these simple modifications all belong to the protection scope of the embodiments of the application.

[0105] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented by instructing the relevant hardware through a program. The program is stored in a storage medium and includes a number of instructions for causing a microcontroller, chip, or processor to execute all or part of the steps in the method embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0106] The above describes in detail the optional embodiments of the present invention in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details of the above embodiments. Within the technical concept of the embodiments of the present invention, the technical solutions of the embodiments of the present invention can be subjected to a variety of simple modifications, and these simple modifications all fall within the scope of protection of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner unless there is any contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not further describe the various possible combinations.

[0107] In addition, various implementations of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A method for manufacturing a blade with a rain cover, characterized in that: The blade comprises: a blade body (1), wherein a pre-prepared target installation area is provided on a blade root section of the blade body (1); a rain cover (2), which is provided on the pre-prepared target installation area of ​​the blade body (1); a reinforcing mechanism (3), which is provided on the blade body (1) and fixedly connected to the rain cover (2), and is used to increase the structural strength between the rain cover (2) and the blade body (1); the reinforcing mechanism (3) comprises: an annular connecting plate (31), which is provided on the blade body (1); a plurality of connecting pieces (32), which are arranged at intervals on the annular connecting plate (31) and have an angle with the annular connecting plate (31), and each connecting piece (32) is fixedly connected to the rain cover (2); the method comprises: Step S1: Determine a rain shield installation position mark with a preset depth on a blade male mold according to a theoretical installation position of the rain shield, and perform a replica of a blade female mold on the blade male mold to obtain a blade forming mold, wherein the blade forming mold has a reinforcement mechanism installation area and a positioning line, wherein the positioning line is used to form a target installation area on the blade during the blade forming process; Step S2: applying a release agent and laying a release cloth on the blade forming mold; Step S3: After laying a layer of release cloth on the reinforcement mechanism installation area of ​​the blade forming mold, the reinforcement mechanism is laid in the reinforcement mechanism installation area, and polytetrafluoroethylene film or vacuum bag film is laid in the area where the connecting piece of the reinforcement mechanism is located, and wrapped to form a sealed space. Step S4: laying a blade layer on the blade forming mold, and laying a release cloth, an isolation film, a guide net, a bonding vacuum bag film, and plugging an exhaust pipe and a rubber inlet hose on the layer; Step S5: forming the blade using a vacuum infusion process, and demoulding the blade after a first preset time; Step S6: unfolding the connecting piece of the reinforcing mechanism to a preset angle; Step S7: fix the rain cover to the pre-prepared target installation area, and connect and fix the connecting piece to the rain cover.

2. The method for manufacturing a blade with a rain cover according to claim 1, characterized in that: The rainproof cover (2) is composed of an annular mounting portion (21), a connecting portion (22) and a rainproof portion (23) connected in sequence; The annular mounting portion (21) is mounted on a pre-prepared target mounting area of ​​the blade body and assembled with the outer surface of the blade body (1); An accommodating space is formed between the connecting portion (22), the rainproof portion (23) and the blade body (1); the reinforcing mechanism (3) is located in the accommodating space; and the connecting portion (22) is connected to a connecting piece (32) of the reinforcing mechanism (3).

3. The method for manufacturing a blade with a rain cover according to claim 2, characterized in that: The annular mounting portion (21) and the blade body (1) are fixed by gluing.

4. The method for manufacturing a blade with a rain cover according to claim 2, characterized in that: The included angle between the connecting piece (32) and the annular connecting plate (31) and the included angle between the annular mounting portion (21) and the connecting portion (22) are complementary angles.

5. The method for manufacturing a blade with a rain cover according to claim 1, characterized in that: The surface where the rain cover (2) is connected to the connecting piece (32) is provided with a mesh pattern for increasing the contact area.

6. The method for manufacturing a blade with a rain cover according to claim 1, characterized in that: In step S2, applying a release agent and laying a release cloth on the blade forming mold includes: Step S21: applying a release agent on the blade forming mold; Step S22: Laying a release cloth on the blade forming mold after a second preset time has passed since the release agent is applied.

7. The method for manufacturing a blade with a rain cover according to claim 1, characterized in that: In step S2, applying a release agent and laying a release cloth on the blade forming mold includes: Step S21: applying a release agent on the blade forming mold; Step S22: After the release agent forms a film, a release cloth is laid on the blade forming mold.

8. The method for manufacturing a blade with a rain cover according to claim 1, characterized in that: In step S3, before placing the reinforcement mechanism in the reinforcement mechanism installation area, the method further includes: The connecting piece of the reinforcing mechanism is wrapped with a polytetrafluoroethylene film or a vacuum bag film.

Images