Blade machining method, blade and wind generating set

Abstract

The invention relates to a blade machining method, a blade and a wind generating set, and the blade machining method comprises the steps that a mold is provided and provided with a front edge, a rear edge and a cavity located between the front edge and the rear edge, and the front edge and the rear edge are oppositely arranged; a flow guide part, an air exhaust assembly and a reinforcer base material are laid on the mold, the reinforcer base material is laid close to the front edge and is provided with a first side and a second side which are oppositely arranged in the thickness direction of the reinforcer base material, and the flow guide part is arranged on at least one of the first side and the second side. The area of the flow guide part arranged on the first side is larger than that of the flow guide part arranged on the second side, and the air exhaust assembly is arranged on the second side. A runner is laid on the side, away from the mold, of the reinforcer base material; a negative pressure environment is formed through the air exhaust assembly, and the pouring material flows in through the flow channel so as to infiltrate the reinforcer base material and form a to-be-formed base body; and the to-be-formed base body is cured and formed, and the blade is obtained. By means of the blade machining method, the product yield can be increased.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and particularly to a blade processing method, a blade and a wind turbine generator set. Background Art

[0002] In existing wind turbine generator sets, the blade is an important component. To enable a blade with a relatively long length to have good structural strength, a special strengthening structure is usually provided on the leading edge side of the blade. The strengthening structure is usually composed of unidirectional cloth made of unidirectional glass fiber. The multi-layer cloth layers are divided into two groups, and there is usually a layer of core material separating the two groups of inner and outer cloth layers to form a strengthening structure with relatively light weight and high strength. Since the strengthening member is provided at the leading edge position of the blade, if it is made into a prefabricated part and connected to the blade after the blade is formed, it is difficult to position. If it is integrally formed with the blade, due to the different layup structures in the adjacent areas at the strengthening member, high-grade defects such as whitening or dry yarn are likely to occur at this position, resulting in a decrease in product yield and production efficiency.

[0003] Therefore, there is an urgent need for a blade processing method, as well as a corresponding blade and wind turbine generator set, that can improve production efficiency and product yield. Summary of the Invention

[0004] Embodiments of the present application provide a blade processing method, a blade and a wind turbine generator set. Among them, the blade processing method can improve processing efficiency and product yield.

[0005] In a first aspect, according to an embodiment of the present application, a blade processing method is proposed, including: providing a mold, the mold having a relatively arranged leading edge, trailing edge, and a cavity located between the leading edge and the trailing edge; laying a flow guiding member, an air extraction component, and a strengthening member base material on the mold, the strengthening member base material being laid close to the leading edge and having a first side and a second side that are relatively arranged in its own thickness direction, at least one of the first side and the second side being provided with a flow guiding member, and the area of the flow guiding member provided on the first side being larger than the area of the flow guiding member provided on the second side, the air extraction component being provided on the second side; laying a flow channel on the side of the strengthening member base material facing away from the mold; forming a negative pressure environment through the air extraction component, and enabling a perfusion material to flow in through the flow channel to infiltrate the strengthening member base material and form a to-be-formed matrix; and curing and molding the to-be-formed matrix to obtain a blade.

[0006] According to an aspect of an embodiment of the present application, the step of laying a flow guiding member, an air extraction component, and a strengthening member base material on the mold includes: making the strengthening member base material include a core material and multiple strengthening layers, the multiple strengthening layers being respectively provided on opposite sides of the core material in its own thickness direction; and making the air extraction component at least partially made of a glue-resistant breathable film.

[0007] According to one aspect of an embodiment of the present application, the step of making the reinforcement substrate include a core material and multiple reinforcement layers includes: making the number of reinforcement layers on both sides of the core material 5 to 10 layers; the step of laying the guide member, the exhaust assembly and the reinforcement substrate on the mold also includes: laying the first guide member on the mold; laying the reinforcement substrate on the side of the first guide member away from the mold; laying the second guide member and the exhaust assembly on the side of the reinforcement substrate away from the mold, so that the exhaust assembly is located on the side of the second guide member close to the leading edge and is staggered with the second guide member, and the area of the second guide member is smaller than that of the first guide member.

[0008] According to one aspect of an embodiment of the present application, the step of laying a first flow guide on a mold includes: setting one side edge of the first flow guide to protrude from the side edge of the cavity close to the leading edge, and the dimension of the first flow guide protruding from the edge of the cavity is 50 mm to 100 mm; the step of laying a reinforcement substrate on the side of the first flow guide facing away from the mold includes: positioning multiple reinforcement layers in the cavity, and having one side edge of the multiple reinforcement layers flush with the edge of the cavity.

[0009] According to one aspect of an embodiment of the present application, the step of laying a flow channel on the side of the reinforcement substrate facing away from the mold includes: laying the flow channel on the second guide member, the distance between the flow channel and the edge of the cavity close to the leading edge is L1, the reinforcement layer width is L2, L2≤L1≤1.2L2.

[0010] According to one aspect of an embodiment of the present application, the step of making the reinforcement substrate include a core material and multiple reinforcement layers includes: making the number of reinforcement layers on both sides of the core material greater than 10 layers; the step of laying the guide member, the vacuum assembly and the reinforcement substrate on the mold also includes: laying the vacuum assembly in the mold cavity; laying the reinforcement substrate on the side of the vacuum assembly away from the mold; laying the guide member on the side of the reinforcement substrate away from the mold, so that the guide member covers the multiple reinforcement layers.

[0011] According to one aspect of an embodiment of the present application, the width of the reinforcement layer is L3, the width of the air extraction component is L4, and 0.4L3≤L4≤0.6L3.

[0012] According to one aspect of an embodiment of the present application, the step of laying a flow channel on the side of the reinforcement substrate facing away from the mold includes: laying the flow channel on the guide member, the distance between the flow channel and the edge of the cavity close to the leading edge is L5, the reinforcement layer width is L3, 1.2L3≤L5≤1.3L3.

[0013] In a second aspect, according to an embodiment of the present application, a blade is proposed, which is manufactured by the blade processing method in any embodiment of the first aspect.

[0014] In a third aspect, according to an embodiment of the present application, a wind turbine generator set is proposed, comprising the blades in any embodiment of the second aspect.

[0015] An embodiment of the present application provides a blade processing method. First, a mold is provided, and then a flow guiding member, an air extraction assembly, and a reinforcing member base material are laid in the mold. The reinforcing member base material has opposite first and second sides. A flow guiding member with a larger area is laid on one of the two sides, and at the same time, an air extraction assembly is laid on the other side. Thereby, the flow rate and infiltration rate of the perfusion material at the location of the reinforcing member base material can be artificially regulated, and the air extraction assembly is located on the side with slower infiltration. Thereby, the possibility of completely extracting the gas and making the perfusion material fully infiltrate can be increased, and further the possibility of problems such as dry yarn or whitening can be reduced, the product yield can be improved, rework and trimming can be reduced, and the processing efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0017] Figure 1 is a flowchart of the blade processing method provided by an embodiment of the present application;

[0018] Figure 2 is Figure 1 a schematic structural diagram corresponding to step S3 of the blade processing method shown;

[0019] Figure 3 is Figure 1 another schematic structural diagram corresponding to step S3 of the blade processing method shown;

[0020] Figure 4 is a schematic structural diagram of a wind turbine generator provided by an embodiment of the present application.

[0021] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale.

[0022] Wherein:

[0023] 100 - blade; 200 - wind turbine generator;

[0024] 10 - mold; 20 - flow guiding member; 30 - air extraction assembly; 40 - reinforcing member base material; 50 - flow channel;

[0025] 11 - leading edge; 12 - cavity; 21 - first flow guiding member; 22 - second flow guiding member; 41 - core material; 42 - reinforcing layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely provided to better understand the present application by showing examples of the present application. In the drawings and the following description, at least some of the well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present application; and, for clarity, the dimensions of some structures may be exaggerated. In addition, the features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments.

[0027] The orientation terms used in the following description are all the directions shown in the figures, and do not limit the specific structures in the molding die and molding method of the present application. In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the meaning of "a plurality" is more than two, and the terms "mounting" and "connecting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0029] In existing wind turbines, the blade is a very critical component. To enable a blade with a relatively large length dimension to have good structural strength, the blade usually has main beams provided in two relatively opposite regions of the shell, and a reinforcing member is provided at the leading edge position. This reinforcing member usually includes a part made of unidirectional fiber material, so it is usually simply referred to as "leading edge UD". The characteristic of this constituent material is that the fibers are arranged parallel in one direction, which can provide excellent strength and stiffness, and at the same time has a relatively light weight. In wind turbine blades, UD materials are mainly used in parts that bear important loads, such as the leading edge of the blade skin as described above.

[0030] Specifically, the width of the fabric layer of the leading edge UD is generally in the range of 200 mm to 700 mm, and has a structural form with a core material sandwiched between an inner fabric layer group and an outer fabric layer group. The number of layers of the inner and outer fabric layers is generally in the range of 5 to 15 layers each. The material of the core material is the same as the core material commonly used in the blade manufacturing process, and can be selected as balsa wood, etc.

[0031] On this basis, the applicant found that since the blade is usually made by separately manufacturing the pressure surface and the suction surface using a mold and then bonding the molds together, when manufacturing the split single-sided structure of the blade, the leading edge position usually has a large angle with the horizontal direction, and may even be perpendicular to the horizontal direction. Therefore, if the above-mentioned leading edge UD reinforcement is manufactured independently from the blade, that is, if the reinforcement is independently formed into a prefabricated part and then connected to the blade, it is difficult to position it. Therefore, it is usually only possible to be potted and formed together with the blade skin through a manual laying process.

[0032] Furthermore, during the potting and forming process, due to the certain difference in the fabric layer structure between the reinforcement and the adjacent area, and the large angle between the position where the reinforcement is located and the horizontal direction, and the potting material needs to infiltrate in the bottom-to-top direction in at least some areas, the infiltration speed on both the inner and outer sides is likely to be different, resulting in high-grade defects such as dry yarn and whitening that are difficult to repair. The product yield is low, and the repair workload is large and the production efficiency is low.

[0033] To solve the above problems, the embodiments of the present application provide a blade processing method, a blade and a wind power generating set, and this blade processing method can improve the processing efficiency and the product yield.

[0034] It can be understood that the following embodiments of the present application only take applying this manufacturing method to the leading edge reinforcement of a wind power blade as an example for illustration, but the application of the manufacturing method provided by the embodiments of the present application is not limited to the following embodiments, and can also be used in other occasions where the internal and external infiltration is uneven in the potting and forming process and protect it.

[0035] To better understand the present application, the following combines Figures 1 to 4 to describe in detail the blade processing method, the blade and the wind power generating set provided by the embodiments of the present application.

[0036] Please refer to Figures 1 to 3 , Figure 1 which is a flowchart of the blade processing method provided by an embodiment of the present application, Figure 2 is Figure 1 a schematic structural diagram corresponding to step S3 of the blade processing method shown, Figure 3 is Figure 1 another schematic structural diagram corresponding to step S3 of the blade processing method shown.

[0037] In a first aspect, according to an embodiment of the present application, a blade processing method is proposed, comprising:

[0038] S1. Provide a mold 10, wherein the mold 10 has a front edge 11 and a rear edge that are oppositely disposed, and a cavity 12 located between the front edge 11 and the rear edge;

[0039] S2. Laying the flow guide 20, the air extraction assembly 30, and the reinforcement base material 40 on the mold 10. The reinforcement base material 40 is laid near the leading edge 11 and has a first side and a second side opposite to each other in its thickness direction. The flow guide 20 is provided on at least one of the first side and the second side, and the area of the flow guide 20 provided on the first side is larger than the area of the flow guide 20 provided on the second side. The air extraction assembly 30 is provided on the second side.

[0040] S3, laying the flow channel 50 on the side of the reinforcement substrate 40 facing away from the mold 10;

[0041] S4. A negative pressure environment is formed by the air extraction assembly 30, and the pouring material flows through the flow channel 50 to infiltrate the reinforcement substrate 40 and form a matrix to be formed;

[0042] S5 , solidifying the substrate to be formed to obtain the blade 100 .

[0043] The present embodiment first provides a blade processing method for processing and manufacturing blades 100 for use in a wind turbine generator set 200, which includes a step S1 of providing a mold 10. In this step, a mold 10 is first provided that matches the shape and size of the blade 100 to be processed. The mold 10 has opposing leading edges 11 and trailing edges. Specifically, a cavity 12 matching the outer surface shape of the blade 100 is formed between the leading edges 11 and the trailing edges in the width direction of the blade 100 to be processed, that is, in the chord direction. Subsequently, the material required for processing the blade 100 can be laid in the cavity 12.

[0044] In step S2, the materials required for processing the blade 100 and the reinforcement are laid on the mold 10, including the guide member 20, the reinforcement substrate 40 and the exhaust assembly 30. The guide member 20 is used to guide and accelerate the infiltration of the injection material into the reinforcement substrate 40, the exhaust assembly 30 is used to form a negative pressure environment during the injection process, and the reinforcement substrate 40 is also used to form the required reinforcement.

[0045] It is understood that in embodiments where the reinforcement member and the blade 100 are integrally formed in the same process step, other materials required to form the main portion of the blade 100, such as a fiber cloth layer and a core material 41 layer, can be laid together in step S2. In embodiments where the reinforcement member includes a core material 41, the core material 41 of the main portion of the blade 100 and the core material 41 of the reinforcement member can be arranged in the same layer and / or laid uniformly, and the core material 41 of both parts can be made of the same material.

[0046] In step S2, the reinforcement substrate 40 is laid at the location where the reinforcement is to be formed, that is, near the leading edge 11 of the mold 10. It may be partially flush with the edge of the cavity 12 near the leading edge 11. The reinforcement substrate 40 and the corresponding air extraction assembly 30 and flow guide 20 extend along the length of the blade 100, that is, the length of the mold 10, so that after infusion, a reinforcement of a predetermined length can be formed.

[0047] The reinforcement substrate 40 has a first side and a second side opposite to each other along its thickness direction. A flow guide 20 is provided on at least one of the two sides, and the area of the flow guide 20 on the first side is larger than the area of the flow guide 20 on the second side. That is, the reinforcement substrate 40 is provided with a flow guide 20 on at least the first side, and the second side may not be provided with a flow guide 20 or may be provided with a flow guide 20 with a smaller area. In this way, when the pouring material is immersed, the flow guide 20 can make the wetting speed on the first side faster than the wetting speed on the second side.

[0048] Furthermore, the exhaust component 30 is arranged on the second side of the reinforcement substrate 40, that is, on the side where the infiltration is slower and air is easily retained. By arranging the exhaust component 30 on this side, the possibility of fully extracting the gas and allowing the filling material to completely and fully infiltrate the reinforcement substrate 40 can be increased, and the possibility of dry yarn, whitening and other problems due to uneven and incomplete infiltration can be reduced, thereby effectively improving the product yield.

[0049] In step S3, a flow channel 50 is laid on the side of the reinforcement facing away from the mold 10. The flow channel 50 is used to transport the potting material, which can be a heat-curing material such as resin. The flow channel 50 can be arranged at a lower position relative to the reinforcement substrate 40 to allow the potting material to fully penetrate from bottom to top.

[0050] In step S4, the gas at the reinforcement substrate 40 is extracted through the exhaust component 30. Optionally, the exhaust component 30 can be connected to a vacuum pump through a pipeline. At the same time, the infusion material flows from the flow channel 50 into the location of the reinforcement substrate 40 and infiltrates the reinforcement substrate 40 to form a uniformly and completely infiltrated matrix to be formed.

[0051] In step S5, the perfusion material in the matrix to be formed is cured and formed by heating and / or placing it in a preset temperature environment, etc., and the reinforcement substrate 40 is wrapped inside to form the required reinforcement. At the same time, the reinforcement and the blade 100 body are perfusion-molded in the same step, and the blade 100 with the reinforcement can be obtained after curing.

[0052] In some alternative embodiments, step S2 of laying the flow guide member 20, the air extraction assembly 30, and the reinforcement substrate 40 on the mold 10 includes:

[0053] Make the reinforcement substrate 40 include a core material 41 and multiple reinforcement layers 42, and the multiple reinforcement layers 42 are respectively arranged on opposite sides of the core material 41 in its own thickness direction;

[0054] Make the air extraction assembly 30 at least partially made of a gel-resistant breathable film.

[0055] In step S2 of the embodiment of the present application, the flow guide member 20, the air extraction assembly 30, and the reinforcement substrate 40 are laid on the mold 10. The reinforcement substrate 40 may include a core material 41 and a reinforcement layer 42. The reinforcement layer 42 may be a fiber cloth layer made of a unidirectional fiber material, and the core material 41 may be balsa wood, PVC foam (Polyvinyl Chloride Foam), PET foam (Polyethylene Terephthalate Foam), etc., which are light in weight and have a certain structural strength.

[0056] The multiple reinforcement layers 42 are respectively laid on both sides of the core material 41. They may have the same width, or, at the position of the edge close to the leading edge 11 of the cavity 12, the reinforcement layer 42 may partially protrude from the core material 41, that is, there is an outward extension area with a certain width, and the reinforcement layers 42 on both sides of the core material 41 in this area may be stacked on top of each other. By setting the reinforcement substrate 40 as the core material 41 and the reinforcement layers 42 on both sides, the structural strength of the reinforcement can be improved.

[0057] The air extraction assembly 30 may include a gel-resistant breathable film, that is, a VAP (Vacuum Assisted Process) film. This film material can allow gas to pass through and prevent the perfusion material from passing through. It is commonly used in the perfusion molding process of wind turbine blades 100. The VAP film can assist in guiding the flow and promoting the uniform infiltration of the perfusion material, and can be used in conjunction with the vacuum bag film to form a sealed space to ensure the stability of the negative pressure environment and prevent air from infiltrating; at the same time, the VAP film can prevent the perfusion material from directly contacting the vacuum pipeline or equipment, thereby reducing the risk of contamination and blockage.

[0058] In some alternative embodiments, the step of making the reinforcement substrate 40 include a core material 41 and multiple reinforcement layers 42 includes:

[0059] The number of layers of the reinforcing layers 42 on both sides of the core material 41 is 5 to 10 layers;

[0060] The step S2 of laying the flow guiding member 20, the air extraction assembly 30 and the reinforcing member base material 40 on the mold 10 further includes:

[0061] Laying a first flow guiding member 21 on the mold 10;

[0062] Laying the reinforcing member base material 40 on the side of the first flow guiding member 21 away from the mold 10;

[0063] Laying a second flow guiding member 22 and the air extraction assembly 30 on the side of the reinforcing member base material 40 away from the mold 10, so that the air extraction assembly 30 is located on the side of the second flow guiding member 22 close to the leading edge 11 and is arranged staggeredly with the second flow guiding member 22, and the area of the second flow guiding member 22 is smaller than the area of the first flow guiding member 21.

[0064] In the present application, the specific laying position of the flow guiding member 20 can be set according to the number of layers of the reinforcing layer 42. Specifically, in the embodiment where the reinforcing layers 42 on both sides of the core material 41 in the reinforcing member base material 40 are both 5 to 10 layers, flow guiding members 20 can be arranged on both sides of the reinforcing member base material 40, and the side of the reinforcing member base material 40 facing the mold 10 can be set as the first side.

[0065] Specifically, in this embodiment, step S2 may first include laying a first flow guiding member 21 on the mold 10. The first flow guiding member 21 can be selected as a continuous mat. The continuous mat can improve the possibility of uniform load distribution, and at the same time can reduce the risk of interlayer delamination. The porous structure of the continuous mat helps the perfusion material to quickly and uniformly penetrate into the fiber layer, reducing bubbles and dry spots, and ensuring the density of the composite material to optimize the distribution of the perfusion material.

[0066] Subsequently, the reinforcing member base material 40 is laid on the first flow guiding member 21, and multiple layers of reinforcing layers 42, the core material 41 and multiple layers of reinforcing layers 42 on the opposite side are laid in sequence. The orthographic projection of the reinforcing member base material 40 on the mold 10 can be located within the contour range of the orthographic projection of the first flow guiding member 21 on the mold 10.

[0067] A second flow guiding member 22 and the air extraction assembly 30 can be arranged on the side of the reinforcing member base material 40 away from the mold 10. Among them, the second flow guiding member 22 covers a part of the surface of the reinforcing member base material 40, and its area should be smaller than the area of the first flow guiding member 21 to leave space for the arrangement of the air extraction assembly 30. The air extraction assembly 30 and the second flow guiding member 22 are laid staggeredly, and can be located at a position above the second flow guiding member 22 in the vertical direction to facilitate the extraction of the gas gathering upward. The air extraction assembly 30 can be selected as a VAP air extraction bag.

[0068] Through this laying method, the perfusion material can have a faster infiltration and climbing speed on one side of the first flow guiding member 21, driving the participating gas at the reinforcing member base material 40 to the location of the second side air extraction assembly 30, facilitating the complete extraction of the gas and improving the product yield.

[0069] In some alternative embodiments, the step of laying the first flow guiding member 21 on the mold 10 includes:

[0070] Making one side edge of the first flow guiding member 21 protrude from one side edge of the cavity 12 close to the leading edge 11, and the size of the first flow guiding member 21 protruding from the edge of the cavity 12 is 50 mm to 100 mm;

[0071] The step of laying the reinforcing member base material 40 on the side of the first flow guiding member 21 away from the mold 10 includes:

[0072] Making the multi-layer reinforcing layer 42 located inside the cavity 12, and one side edge of the multi-layer reinforcing layer 42 flush with the edge of the cavity 12.

[0073] Optionally, the first flow guiding member 21 may have a partially outward extending area relative to the reinforcing member base material 40 and the cavity 12. The mold 10 may have inner edges and outer edges spaced at a certain interval along the chord direction of the blade 100, and the cavity 12 is located on the side of the inner edge away from the outer edge and is connected to the inner edge. The first flow guiding member 21 is optionally laid in a partial area between the inner edge and the outer edge of the mold 10 by extending the part that extends outward, that is, protrudes from the boundary line between the cavity 12 and the inner edge, so as to facilitate other connections.

[0074] Furthermore, the width dimension of the area where the first flow guiding member 21 protrudes from the edge of the cavity 12 may be 50 mm to 100 mm, for example, it may be any one of 50 mm, 65 mm, 80 mm, 100 mm or between any two of them. Along the length direction of the blade 100, the protruding widths of each part of the first flow guiding member 21 may be the same or similar.

[0075] At the same time, the multi-layer reinforcing layer 42 may be all arranged inside the cavity 12 and flush with the edge of the cavity 12, that is, at the same height as the boundary line between the cavity 12 and the inner edge, and does not extend to the area between the inner edge and the outer edge, so that the formed reinforcing member can be accurately located at the preset position.

[0076] In some alternative embodiments, the step of laying the runner 50 on the side of the reinforcing member base material 40 away from the mold 10 includes:

[0077] Laying the runner 50 on the second flow guiding member 22, the distance between the runner 50 and one side edge of the cavity 12 close to the leading edge 11 is L1, and the width of the reinforcing layer 42 is L2, where L2 ≤ L1 ≤ 1.2L2.

[0078] In the embodiment where the reinforcing layers 42 on both sides of the foregoing core material 41 are both 5 to 10 layers, the runner 50 can be laid on the side of the second flow guiding member 22 away from the mold 10, and can be optionally arranged at a relatively lower position, that is, a position far from the leading edge 11 side edge of the cavity 12. On this basis, the distance between the runner 50 and this edge of the cavity 12 is denoted as L1, and the dimension of the reinforcing layer 42 in the width direction perpendicular to its own extending direction is denoted as L2. Then L1 can be optionally between L2 and 1.2L2, and further optionally about 1.1L2, so that the perfusion material can be more complete and uniformly strengthen the substrate 40 from bottom to top.

[0079] It can be understood that the foregoing distance L1 and L2 can be optionally the straight-line distance. Or, optionally, a connecting line is made along the cavity wall of the cavity 12, and the dimension of the shortest connecting line between the edge of the cavity 12 and the orthographic projection of the runner 50 on the mold 10 is denoted as the distance L1, and the width dimension between the two side edges of the orthographic projection of the reinforcing layer 42 on the mold 10 is denoted as the distance L2.

[0080] In some alternative embodiments, the steps of making the reinforcing member substrate 40 include a core material 41 and multiple reinforcing layers 42 include:

[0081] Make the number of layers of the reinforcing layers 42 on both sides of the core material 41 be greater than 10 layers;

[0082] The steps of laying the flow guiding member 20, the air extraction assembly 30 and the reinforcing member substrate 40 on the mold 10 further include:

[0083] Lay the air extraction assembly 30 in the cavity 12;

[0084] Lay the reinforcing member substrate 40 on the side of the air extraction assembly 30 away from the mold 10;

[0085] Lay the flow guiding member 20 on the side of the reinforcing member substrate 40 away from the mold 10, so that the flow guiding member 20 covers the arrangement of multiple reinforcing layers 42.

[0086] Corresponding to the foregoing embodiment where the reinforcing layer 42 is 5 to 10 layers, more than 10 layers of reinforcing layers 42 can be respectively arranged on both sides of the core material 41, and a laying structure with certain differences from the foregoing embodiment is adopted.

[0087] Specifically, in an embodiment where the number of reinforcing layers 42 on both sides of the core material 41 is greater than 10 layers, and can be optionally 10 - 15 layers, the air extraction assembly 30 can be first laid on the mold 10. The air extraction assembly 30 can include a VAP film. Subsequently, the reinforcing member substrate 40 is laid on the side of the air extraction assembly 30 facing away from the mold 10, and then the flow guide member 20 is laid on the side of the reinforcing member substrate 40 facing away from the mold 10. The flow guide member 20 can be optionally a flow media, and the flow media can be made of materials such as polypropylene or polyethylene, and provides the function of accelerating the resin flow and ensuring uniform wetting of the fiber layer.

[0088] The flow guide member 20 can be optionally arranged to cover the reinforcing member substrate 40, that is, the orthographic projection of the flow guide member 20 on the mold 10 can cover the orthographic projection of the reinforcing member substrate 40 on the mold 10, so that the perfusion material can climb uniformly and cover the side of the reinforcing member substrate 40 facing away from the mold 10.

[0089] In this embodiment, the side of the reinforcing member substrate 40 facing away from the mold 10 is the first side, and the side facing the mold 10 is the second side. The flow guide member 20 can make the infiltration speed of the perfusion material on the first side faster, so as to drive the residual gas to the second side facing the mold 10, and is extracted by the air extraction assembly 30 arranged on this side, ensuring the integrity of the infiltration of the perfusion material.

[0090] In this embodiment, the upper edges of the reinforcing member substrate 40, the air extraction assembly 30, and the flow guide member 20 can all be flush with the side edge of the cavity 12 near the front edge 11.

[0091] In some alternative embodiments, the width of the reinforcing layer 42 is L3, and the width of the air extraction assembly 30 is L4, where 0.4L3 ≤ L4 ≤ 0.6L3.

[0092] In the foregoing embodiment with a relatively large number of layers of the reinforcing layer 42, the width of the reinforcing member, that is, the dimension of the reinforcing layer 42 in the width direction perpendicular to its own extension direction, is denoted as L3, and the width of the air extraction assembly 30 is denoted as L4. Then L4 can be between 0.4L3 and 0.6L3, and further optionally about 0.5L3. Exemplarily, the two side edges in the width direction of the air extraction assembly 30 can be respectively arranged opposite to the side edge of the reinforcing layer 42 near the inner edge of the mold 10 and the midline of the reinforcing layer 42.

[0093] By defining the size of the air extraction assembly 30 and arranging it upwards, it is convenient to extract the gas, and further reduces the risk of poor infiltration.

[0094] In some alternative embodiments, the step S3 of laying the flow channel 50 on the side of the reinforcing member substrate 40 facing away from the mold 10 includes:

[0095] The flow channel 50 is laid on the flow guide 20 , and the distance between the flow channel 50 and the edge of the cavity 12 close to the leading edge 11 is L5 . The width of the reinforcement layer 42 is L3 , and 1.2L3≤L5≤1.3L3 .

[0096] In the aforementioned embodiment with a large number of reinforcing layers 42, the runner 50 can be positioned on the side of the flow guide 20 facing away from the mold 10, and vertically close to the lower edge. Based on this, the distance between the runner 50 and the edge of the cavity 12 near the leading edge 11 is denoted as L5. Given a width of L3 for the reinforcing layer 42, L5 can be set between 1.2L3 and 1.3L3, for example, any one of 1.2L3, 1.25L3, 1.3L3, or any two thereof.

[0097] By positioning the flow channel 50 downward and ensuring that the dimension between it and the edge of the cavity 12 is greater than the width of the reinforcement layer 42 , the pouring material can flow in from below the reinforcement substrate 40 and fully infiltrate the reinforcement substrate 40 , thereby avoiding uneven distribution of the pouring material and insufficient filling at the bottom of the reinforcement substrate 40 , thereby improving the product yield.

[0098] See also Figure 4 , Figure 4 2 is a structural diagram of a wind turbine generator set 200 provided in one embodiment of the present application. In a second aspect, according to an embodiment of the present application, a blade 100 is provided, which is manufactured by the blade processing method of any embodiment of the first aspect.

[0099] In a third aspect, according to an embodiment of the present application, a wind turbine generator set 200 is proposed, comprising the blade 100 in any embodiment of the second aspect.

[0100] The blade 100 and the wind turbine generator set 200 in the embodiment of the present application have all the beneficial effects of the blade processing method in the first aspect. For details, please refer to the specific description of the blade processing method in the above embodiments, and this embodiment will not be repeated here.

[0101] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A blade processing method, characterized in that, include: Providing a mold, the mold having a leading edge and a trailing edge disposed opposite to each other, and a cavity located between the leading edge and the trailing edge; A flow guide, an air extraction component, and a reinforcement substrate are laid on the mold. The reinforcement substrate is laid near the leading edge and has a first side and a second side that are oppositely disposed in the thickness direction thereof. A flow guide is disposed on at least one of the first side and the second side, and the area of the flow guide disposed on the first side is larger than the area of the flow guide disposed on the second side. The air extraction component is disposed on the second side, so that the reinforcement substrate includes a core material and multiple reinforcement layers, and the multiple reinforcement layers are respectively disposed on two opposite sides of the core material in the thickness direction thereof. Laying a flow channel on a side of the reinforcement substrate facing away from the mold; A negative pressure environment is formed by the air extraction component, and the pouring material is allowed to flow through the flow channel to infiltrate the reinforcement substrate and form a matrix to be formed; solidifying the matrix to be formed to obtain a blade; The step of making the reinforcement substrate include a core material and multiple reinforcement layers includes: The number of layers of the reinforcement layers on both sides of the core material is 5 to 10; The step of laying the guide member, the air extraction assembly and the reinforcement substrate on the mold further comprises: laying a first flow guide on the mold; Laying the reinforcement substrate on the side of the first flow guide facing away from the mold; Laying a second flow guide and the air extraction component on a side of the reinforcement substrate facing away from the mold, so that the air extraction component is located on a side of the second flow guide close to the leading edge and is staggered with the second flow guide, and the area of the second flow guide is smaller than that of the first flow guide; Alternatively, the step of making the reinforcement substrate include a core material and multiple reinforcement layers includes: The number of the reinforcement layers on both sides of the core material is greater than 10; The step of laying the guide member, the air extraction assembly and the reinforcement substrate on the mold further comprises: Laying the exhaust assembly in the cavity; Laying the reinforcement substrate on the side of the exhaust assembly facing away from the mold; The guide member is laid on the side of the reinforcement member substrate facing away from the mold, so that the guide member covers the multiple reinforcement layers.

2. The blade processing method according to claim 1, characterized in that, The step of laying the guide member, the air extraction assembly and the reinforcement substrate on the mold includes: The air extraction component is at least partially made of a glue-resistant breathable membrane.

3. The blade processing method according to claim 1, characterized in that: The step of laying the first flow guide on the mold includes: One side edge of the first flow guide is arranged to protrude from the side edge of the cavity close to the leading edge, and the first flow guide protrudes from the edge of the cavity by a dimension of 50 mm to 100 mm; The step of laying the reinforcement substrate on the side of the first flow guide facing away from the mold comprises: The multiple layers of reinforcing layers are located in the mold cavity, and one side edge of the multiple layers of reinforcing layers is flush with the edge of the mold cavity.

4. The blade processing method according to claim 1, wherein, The step of making the reinforcement substrate include a core material and multiple reinforcement layers includes: The number of layers of the reinforcement layers on both sides of the core material is 5 to 10; The step of laying a runner on the side of the reinforcing member substrate facing away from the mold includes: Laying the runner on the second flow guiding member, with a spacing of L1 between the runner and the side edge of the cavity near the leading edge, and the width of the reinforcing layer being L2, where L2 ≤ L1 ≤ 1.2L2.

5. The blade processing method according to claim 1, characterized in that The step of making the reinforcing member substrate include a core material and multiple reinforcing layers includes: Making the number of layers of the reinforcing layers on both sides of the core material greater than 10 layers; The width of the reinforcing layer is L3, and the width of the air extraction assembly is L4, where 0.4L3 ≤ L4 ≤ 0.6L3.

6. The blade processing method according to claim 1, wherein The step of making the reinforcing member substrate include a core material and multiple reinforcing layers includes: Making the number of layers of the reinforcing layers on both sides of the core material greater than 10 layers; The step of laying a runner on the side of the reinforcing member substrate facing away from the mold includes: Laying the runner on the flow guiding member, with a spacing of L5 between the runner and the side edge of the cavity near the leading edge, and the width of the reinforcing layer being L3, where 1.2L3 ≤ L5 ≤ 1.3L3.

7. A blade, characterized in that, Obtained by the blade processing method according to any one of claims 1 to 6.

8. A wind turbine generator, characterized in that, Including the blade according to claim 7.

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