Vacuum infusion forming method for wind power blade component

Abstract

The invention relates to a vacuum infusion forming method for a wind power blade component. The vacuum infusion forming method for the wind power blade component comprises the steps that a blade mold is provided; laying a fiber reinforcement layer on the blade mold; laying demolding cloth on the fiber reinforced layer; a flow guide net is laid on the demolding cloth; an interlayer is laid on the local area of the flow guide net and comprises a bubble dispersion layer and a heat insulation layer, and the bubble dispersion layer is connected with the heat insulation layer; a flow guide pipe is arranged on the interlayer and is positioned on one side, opposite to the flow guide net, of the interlayer; laying a vacuum bag film; a vacuum pump is used for exhausting air, so that negative pressure is formed in the vacuum bag film; and a perfusion material is provided, the perfusion material is injected through the flow guide pipe, and the perfusion material infiltrates the fiber reinforced layer and is subjected to curing treatment to form the blade component. According to the vacuum infusion forming method for the wind power blade component, it can be guaranteed that the formed blade component is not prone to whitening, and meanwhile the number of bubbles in the blade component is small or no bubble exists in the blade component.

Description

Technical Field

[0001] The present application relates to the field of wind power generation, and in particular to a method for vacuum infusion molding of wind power blade components. Background Art

[0002] In recent years, wind energy, as a large-scale commercial clean renewable energy, has attracted widespread attention from all countries. With the rapid development of the wind power industry, wind turbine blades are constantly increasing in size. Wind turbine blades are the core components of wind turbines to capture wind energy, and their operating status is directly related to the efficiency of wind energy utilization. At present, vacuum infusion molding is usually used to manufacture wind turbine blades. Therefore, how to improve the quality of wind turbine blades manufactured by vacuum infusion molding to ensure the structural safety of large wind turbine blades has become a research focus. Summary of the invention

[0003] The present application provides a method for vacuum infusion molding of a wind turbine blade component, which can ensure that the molded blade component is not prone to whitening problems and has a small number of bubbles or no bubbles inside.

[0004] The embodiment of the present application provides a vacuum infusion molding method for a wind turbine blade component, which comprises:

[0005] Provide blade molds;

[0006] Laying fiber reinforcement layers on the blade mold;

[0007] Laying a release cloth on the fiber reinforcement layer;

[0008] Lay the guide net on the release cloth;

[0009] Laying an interlayer on a local area of ​​the guide net, the interlayer comprising an air bubble dispersion layer and an insulation layer, the air bubble dispersion layer and the insulation layer being connected;

[0010] A flow guide pipe is arranged on the partition, and the flow guide pipe is located on the side of the partition facing away from the flow guide net;

[0011] Laying vacuum bag film;

[0012] Use a vacuum pump to extract air to create a negative pressure inside the vacuum bag film;

[0013] A perfusion material is provided, and the perfusion material is injected through the guide tube. The perfusion material infiltrates the fiber reinforcement layer and is cured to form a blade component.

[0014] In the vacuum infusion molding method of the wind turbine blade component of the embodiment of the present application, a partition is provided on one side of the guide net, and a guide pipe is provided on one side of the partition. The guide pipe is used to introduce the infusion material with a relatively high temperature. The infusion material discharged from the guide pipe will release a large amount of heat. The partition can block the infusion material discharged from the guide pipe. A part of the infusion material discharged from the guide pipe can pass through the partition, the guide net and the release cloth and flow to the fiber reinforced layer, and a part of it can flow to the area outside the partition and pass through the guide net and the release cloth and flow to the fiber reinforced layer. The partition can effectively disperse the infusion material discharged from the guide pipe, and reduce the possibility that the infusion material discharged from the guide pipe continuously releases a large amount of heat at the outlet of the guide pipe and forms heat accumulation.

[0015] In addition, the heat insulation layer in the partition can effectively isolate the injection material at the guide tube from the fiber reinforcement layer below. During the curing stage of the injection material, the heat released by the injection material at the guide tube is not easy to be transferred to the fiber reinforcement layer, reducing the possibility that the injection material curing rate or curing effect under the guide tube is affected by the local high temperature and causing the molded blade component to have a local whitening problem.

[0016] Furthermore, during the process of the perfusion material flowing through the interlayer, the bubble dispersion layer in the interlayer can disperse and absorb the bubbles carried in the perfusion material, thereby effectively reducing the number of bubbles in the perfusion material and reducing the number of bubbles in the blade component. At the same time, during the curing process of the perfusion material at the fiber reinforcement layer, small bubbles in the perfusion material can continuously gather to form large bubbles. Large bubbles can move upward toward the interlayer. After the large bubbles enter the bubble dispersion layer, the bubble dispersion layer can disperse the large bubbles into small bubbles and the bubble dispersion layer can absorb the small bubbles, so that the small bubbles are retained in the bubble dispersion layer.

[0017] Therefore, the blade component formed by the vacuum infusion molding method of the wind turbine blade component of the embodiment of the present application is not prone to local whitening problems, and the number of bubbles inside the blade component is small or there are no bubbles. The blade component formed by the vacuum infusion molding method of the wind turbine blade component of the embodiment of the present application has a high product yield and good product quality, effectively reducing the possibility of rework or product scrapping.

[0018] In some achievable embodiments, a heat insulating layer is disposed on one side of the bubble dispersion layer; or, heat insulating layers are disposed on two opposite sides of the bubble dispersion layer.

[0019] In some achievable embodiments, the bubble dispersion layer and the thermal insulation layer are bonded together; or, the bubble dispersion layer and the thermal insulation layer are integrally formed.

[0020] In some achievable manners, along the thickness direction of the partition, the orthographic projection of the flow guide tube is located within the orthographic projection of the partition.

[0021] In some achievable embodiments, the spacer extends beyond the dimension of the flow guide tube by 1 mm or more.

[0022] In some achievable embodiments, a spacer is provided in a region where the number of fiber-reinforced layers is greater than or equal to 40 layers; and / or,

[0023] A fiber reinforcement layer is laid on the blade mould, a core material is laid on the fiber reinforcement layer, a fiber reinforcement layer is laid on the core material, and the partition layer is arranged corresponding to the core material.

[0024] In some achievable embodiments, the flow guide tube and the partition layer are connected by at least one of bonding and wire binding; or, the partition layer and the flow guide tube are integrally formed.

[0025] In some achievable embodiments, the bubble dispersion layer includes a first fiber layer formed by weaving warp threads and weft threads; or, the bubble dispersion layer includes a first fiber layer and a second fiber layer, the first fiber layer is formed by weaving warp threads and weft threads, the second fiber layer is arranged between the two first fiber layers, and the second fiber layer supports the first fiber layer;

[0026] The thermal insulation layer is connected to the first fiber layer.

[0027] In some achievable embodiments, the flow guide tube includes a first liquid outlet and a second liquid outlet, the first liquid outlet is arranged facing the partition layer, and the second liquid outlets are respectively arranged on two axially opposite end surfaces of the flow guide tube.

[0028] In some achievable embodiments, the thermal insulation layer includes a first through hole, and the first through hole penetrates the thermal insulation layer along a thickness direction of the thermal insulation layer.

[0029] In some achievable embodiments, the cross-sectional area of ​​the first through hole is S1, and the orthographic projection area of ​​the thermal insulation layer along the thickness direction of the insulation layer is S2, wherein the value range of S1 / S2 is 0.000049 to 0.008.

[0030] In some achievable embodiments, the shape of the heat insulation layer is rectangular, and the first through hole is a rectangular hole or a circular hole.

[0031] In some achievable embodiments, the bubble dispersion layer includes a second through hole, and the second through hole penetrates the bubble dispersion layer along the thickness direction of the barrier layer.

[0032] In some achievable embodiments, the cross-sectional area of ​​the second through hole is S11, and the orthographic projection area of ​​the bubble dispersion layer along the thickness direction of the partition layer is S22, wherein the value range of S11 / S22 is 0.00000785 to 0.00003.

[0033] In some achievable embodiments, the bubble dispersion layer is rectangular in shape, the number of the second through holes is two or more, and at least two of the second through holes are interconnected.

[0034] In some achievable embodiments, the thickness of the thermal insulation layer ranges from 3 mm to 10 mm; and / or the thickness of the bubble dispersion layer ranges from 1 mm to 10 mm.

[0035] In some practicable manners, a porous isolation membrane is laid on the release cloth, and a flow guide net is laid on the porous isolation membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0037] Figure 1 A schematic diagram of the structure of a wind turbine generator set provided in some embodiments of the present application;

[0038] Figure 2 A schematic diagram of a process flow of a vacuum infusion molding method for wind turbine blade components provided in some embodiments of the present application;

[0039] Figure 3 A schematic diagram of a vacuum infusion molding process for wind turbine blade components provided in some embodiments of the present application;

[0040] Figure 4 A schematic diagram of a partial structure of a partition provided in some embodiments of the present application;

[0041] Figure 5 A schematic diagram of a local structure of a wind turbine blade component in a vacuum infusion molding process provided in some embodiments of the present application;

[0042] Figure 6 A schematic diagram of a partial structure of a partition provided in some embodiments of the present application;

[0043] Figure 7 A schematic diagram of a partial structure of a connection state between a partition and a flow guide tube provided in some embodiments of the present application;

[0044] Figure 8 A schematic diagram of a local structure of a wind turbine blade component in a vacuum infusion molding process provided in some embodiments of the present application;

[0045] Fig. 9 A schematic diagram of a local structure of a wind turbine blade component in a vacuum infusion molding process provided in some embodiments of the present application;

[0046] Fig.10 A schematic diagram of a partial structure of a flow guide tube provided in some embodiments of the present application;

[0047] Fig.11A schematic diagram of a partial structure of a partition provided in some embodiments of the present application;

[0048] Fig.12 A schematic diagram of a partial structure of a partition provided in some embodiments of the present application;

[0049] Fig.13 A schematic diagram of a partial structure of a heat insulation layer provided in some embodiments of the present application;

[0050] Fig.14 A schematic diagram of a partial structure of a heat insulation layer provided in some embodiments of the present application;

[0051] Fig.15 A schematic diagram of the local structure of the bubble dispersion layer provided in some embodiments of the present application.

[0052] In the drawings, the drawings are not necessarily drawn to scale.

[0053] Description of reference numerals:

[0054] 100, wind turbine generator set; 110, tower; 120, nacelle; 130, wind rotor; 131, hub; 132, blades;

[0055] 10. Blade mold;

[0056] 20. Fiber reinforcement layer;

[0057] 30. Release cloth;

[0058] 40. Diversion net;

[0059] 50. Interlayer;

[0060] 51, thermal insulation layer; 51a, first through hole;

[0061] 52, bubble dispersion layer; 52a, second through hole; 521, first fiber layer; 522, second fiber layer;

[0062] 60. Draft tube;

[0063] 61. First liquid outlet;

[0064] 62. Second liquid outlet;

[0065] 70. Vacuum bag film;

[0066] 80. Porous isolation membrane;

[0067] 90. Core material;

[0068] Z, thickness direction. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0070] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0071] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0072] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0073] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0074] The term "plurality" used in the present application refers to two or more (including two).

[0075] Figure 1 The structure of the wind turbine generator set 100 is schematically shown. Figure 1 As shown, an embodiment of the present application provides a wind turbine generator set 100 .

[0076] The wind turbine generator set 100 includes a tower 110, a nacelle 120 and a wind rotor 130. The nacelle 120 is arranged at the top of the tower 110. The wind rotor 130 includes a hub 131 and blades 132. The blades 132 are connected to the hub 131. The hub 131 is connected to the main shaft of the nacelle 120. The blades 132 can generate torque under the action of wind. The blades 132 and the hub 131 drive the main shaft of the nacelle 120 to rotate, so that wind energy can be converted into mechanical energy. The main shaft of the nacelle 120 can be connected to the rotor of the generator, so that mechanical energy can be converted into electrical energy. The blade components can be processed and manufactured by vacuum infusion molding. Two blade components can be connected to form a complete blade 132.

[0077] In the related art, a vacuum infusion molding method is used to process and mold blade components. During the molding process, a fiber reinforcement layer, a demoulding cloth and a guide net are laid on the blade mold. A guide pipe is used above the guide net to transport the higher temperature infusion material. The infusion material can pass through the guide net and the demoulding cloth and flow to the fiber reinforcement layer to infiltrate the fiber reinforcement layer. In the process of the infusion material completing the infiltration and curing of the fiber reinforcement layer, the infusion material at the guide pipe will still release a large amount of heat, thereby affecting the curing of the infusion material in the corresponding area below, resulting in the problem of partial whitening of the formed blade component. At the same time, in the case where bubbles are carried in the injected infusion material or bubbles are generated during the curing process of the infusion material, the bubbles will gather in large quantities, resulting in local cavities in the formed blade component, affecting the mechanical properties of the blade component.

[0078] The blade components formed by the vacuum infusion molding method of the wind turbine blade components in the embodiment of the present application are not prone to whitening problems, and the number of bubbles inside is small or there are no bubbles.

[0079] Figure 2 The vacuum infusion molding method of wind turbine blade components is schematically shown. Figure 3 The vacuum infusion molding process of wind turbine blade components is schematically shown. Figure 4 The local structure of the interlayer is schematically shown.

[0080] See also Figure 2 , Figure 3 and Figure 4 As shown, the embodiment of the present application provides a vacuum infusion molding method for a wind turbine blade component, which includes:

[0081] Providing a blade mold 10;

[0082] Laying a fiber reinforcement layer 20 on the blade mold 10;

[0083] Laying a release cloth 30 on the fiber-reinforced layer 20;

[0084] Laying a guide net 40 on the release cloth 30;

[0085] An interlayer 50 is laid on a local area of ​​the guide net 40, wherein the interlayer 50 includes a heat insulation layer 51 and a bubble dispersion layer 52, and the bubble dispersion layer 52 is connected to the heat insulation layer 51;

[0086] A flow guide pipe 60 is disposed on the partition layer 50 , and the flow guide pipe 60 is located on a side of the partition layer 50 facing away from the flow guide net 40 ;

[0087] Laying vacuum bag film 70;

[0088] Use a vacuum pump to evacuate air so that the vacuum bag film 70 is under negative pressure;

[0089] A potting material is provided and injected through the guide tube 60 . The potting material infiltrates the fiber reinforcement layer 20 and is cured to form a blade component.

[0090] In some practicable manners, after the infusion material is cured and the infusion material and the fiber reinforcement layer 20 form a blade component, the release cloth 30 , the guide net 40 , the spacer 50 , the guide tube 60 and the vacuum bag film 70 are removed.

[0091] In some practicable ways, the temperature of the infusion material injected through the flow guide tube 60 is maintained at 130 degrees Celsius (° C.) to 150 degrees Celsius to ensure that the infusion material itself has good fluidity, so that the infusion material has good infiltration speed and infiltration effect. In some examples, the infusion material can be a resin material.

[0092] The heat insulating layer 51 in the barrier layer 50 of the embodiment of the present application has a heat insulating function, so that the heat insulating layer 51 can isolate the injection material at the injection position of the flow guide tube 60 from the fiber reinforced layer 20. The heat insulating layer 51 can disperse and block the heat continuously released by the injection material at the injection position of the flow guide tube 60, and reduce the possibility of the heat released by the injection material at the injection position of the flow guide tube 60 accumulating in the corresponding area of ​​the fiber reinforced layer 20.

[0093] The bubble dispersion layer 52 in the interlayer 50 of the embodiment of the present application has the function of dispersing bubbles and adsorbing bubbles. In the stage of injecting the perfusion material, when the perfusion material contains bubbles, the bubble dispersion layer 52 can disperse large bubbles into small bubbles and the bubble dispersion layer 52 can adsorb small bubbles during the flow of the perfusion material through the bubble dispersion layer 52, so that the small bubbles can be retained in the bubble dispersion layer 52, thereby effectively reducing the number of bubbles in the perfusion material flowing to the fiber reinforced layer 20. In the stage of curing the perfusion material, during the curing process of the perfusion material, small bubbles in the perfusion material can continuously gather to form large bubbles. Large bubbles can move upward toward the interlayer 50. Large bubbles can enter the bubble dispersion layer 52 after passing through the release cloth 30 and the guide net 40. The bubble dispersion layer 52 can disperse large bubbles into small bubbles and the bubble dispersion layer 52 can adsorb small bubbles, so that small bubbles can be retained in the bubble dispersion layer 52.

[0094] In the vacuum infusion molding method of the wind turbine blade component of the embodiment of the present application, a partition 50 is provided on one side of the guide net 40, and a guide pipe 60 is provided on one side of the partition 50. The guide pipe 60 is used to introduce the infusion material with a relatively high temperature. The infusion material discharged from the guide pipe 60 will release a large amount of heat. The partition 50 can block the infusion material discharged from the guide pipe 60. A part of the infusion material discharged from the guide pipe 60 can pass through the partition 50, the guide net 40 and the release cloth 30 and flow to the fiber reinforced layer 20, and a part of it can flow to the area outside the partition 50 and pass through the guide net 40 and the release cloth 30 and flow to the fiber reinforced layer 20. The partition 50 can effectively disperse the infusion material discharged from the guide pipe 60, and reduce the possibility that the infusion material discharged from the guide pipe 60 continuously releases a large amount of heat at the outlet of the guide pipe 60 and forms heat accumulation.

[0095] In addition, the heat insulating layer 51 in the partition layer 50 can effectively isolate the injection material at the guide tube 60 from the fiber reinforced layer 20 below. During the injection material curing stage, the heat released by the injection material at the guide tube 60 is not easily transferred to the fiber reinforced layer 20, which reduces the possibility that the injection material curing rate or curing effect below the guide tube 60 is affected by the local high temperature and causes the molded blade component to have a local whitening problem.

[0096] Furthermore, during the process of the pouring material flowing through the interlayer 50, the bubble dispersion layer 52 in the interlayer 50 can disperse and absorb the bubbles carried in the pouring material, thereby effectively reducing the number of bubbles in the pouring material and reducing the number of bubbles in the blade component. At the same time, during the curing process of the pouring material at the fiber reinforcement layer 20, small bubbles in the pouring material can continuously gather to form large bubbles. The large bubbles can move upward toward the interlayer 50. After the large bubbles enter the bubble dispersion layer 52, the bubble dispersion layer 52 can disperse the large bubbles into small bubbles and the bubble dispersion layer 52 can absorb the small bubbles, so that the small bubbles are retained in the bubble dispersion layer 52.

[0097] Therefore, the blade component formed by the vacuum infusion molding method of the wind turbine blade component of the embodiment of the present application is not prone to local whitening problems, and the number of bubbles inside the blade component is small or there are no bubbles. The blade component formed by the vacuum infusion molding method of the wind turbine blade component of the embodiment of the present application has a high product yield and good product quality, effectively reducing the possibility of rework or product scrapping.

[0098] In some achievable embodiments, during the curing process of the infusion material at the fiber reinforced layer 20 , the vacuum bag film 70 can be evacuated so that the bubble dispersion layer 52 can be in a negative pressure state, so that large bubbles formed in the infusion material at the fiber reinforced layer 20 can rise and move relatively easily and reach the bubble dispersion layer 52 .

[0099] In some practicable manners, an edge of the vacuum bag film 70 may be bonded to the blade mold 10 using tape or adhesive to form a sealed space under the vacuum bag film 70 .

[0100] In some achievable ways, Figure 5 Schematic diagram showing the local structure of wind turbine blade components during vacuum infusion molding process. Figure 5 As shown, a porous isolation film 80 is laid on the demoulding cloth 30. Then, a guide net 40 is laid on the porous isolation film 80. The porous isolation film 80 is a porous structure, which is conducive to ensuring smooth penetration of the injection material. The porous isolation film 80 can separate the demoulding cloth 30 and the guide net 40. The guide net 40 can be used to disperse the injection material. The porous isolation film 80 can be used to disperse the injection material that passes through the guide net 40 again, so that the injection material can evenly penetrate and infiltrate the fiber reinforced layer 20.

[0101] In some possible implementations, see Figure 4 As shown, a heat insulating layer 51 is disposed on one side of the bubble dispersion layer 52. While meeting the heat insulating performance requirements, the thickness of the interlayer 50 itself can be relatively small, which is beneficial to reducing the flow resistance generated to the injection material.

[0102] In some examples, the heat insulation layer 51 is disposed on the side of the bubble dispersion layer 52 facing the flow guide net 40. The bubble dispersion layer 52 is disposed close to the flow guide tube 60. Alternatively, the heat insulation layer 51 is disposed on the side of the bubble dispersion layer 52 facing away from the flow guide net 40. The heat insulation layer 51 is disposed close to the flow guide tube 60.

[0103] In some achievable ways, Figure 6 The partial structure of the spacer 50 is schematically shown. Figure 6 As shown, the heat insulation layer 51 is respectively arranged on the opposite sides of the bubble dispersion layer 52. The heat insulation layer 51, the bubble dispersion layer 52 and the heat insulation layer 51 are stacked in sequence. The way of respectively arranging the heat insulation layers 51 on the opposite sides of the bubble dispersion layer 52 can effectively isolate the perfusion material and the fiber reinforcement layer 20 through a larger number of heat insulation layers 51, further reducing heat conduction. In some examples, the number of heat insulation layers 51 is two. The bubble dispersion layer 52 is arranged between the two heat insulation layers 51.

[0104] In some achievable ways, the bubble dispersion layer 52 is bonded to the thermal insulation layer 51. An adhesive is provided on the surface of the thermal insulation layer 51, and then the bubble dispersion layer 52 is bonded to the thermal insulation layer 51. The bonded bubble dispersion layer 52 and the thermal insulation layer 51 form an insulation layer 50. In some examples, when not laid on the blade mold 10, the thermal insulation layer 51 and the bubble dispersion layer 52 are both rectangular. Along the length direction of the thermal insulation layer 51, an adhesive is provided on the two long side edges of the thermal insulation layer 51 at intervals of 0.25 meters (m). Then the bubble dispersion layer 52 is bonded to the thermal insulation layer 51. The two long side edges of the thermal insulation layer 51 are bonded to the two long side edges of the bubble dispersion layer 52, respectively, so that most of the areas outside the bonding area do not affect the penetration of the injection material. Exemplarily, the adhesive can be a hot melt adhesive. In some examples, the material of the thermal insulation layer 51 can include, but is not limited to, fiberglass or polypropylene (PP). The material of the bubble dispersion layer 52 can include, but is not limited to, polyethylene (PE) or polypropylene (PP).

[0105] In some achievable ways, the bubble dispersion layer 52 and the heat insulation layer 51 are integrally formed. The bubble dispersion layer 52 and the heat insulation layer 51 are stably connected and are not easily separated. In some examples, the partition layer 50 is manufactured by an integral injection molding process or a 3D printing process. In some examples, the material of the heat insulation layer 51 and the material of the bubble dispersion layer 52 can be the same.

[0106] In some achievable ways, Figure 7 The partial structure of the connection state between the partition 50 and the flow guide tube 60 is schematically shown. Figure 8 Schematic diagram showing the local structure of wind turbine blade components during vacuum infusion molding process. Figure 7 and Figure 8As shown, along the thickness direction Z of the interlayer 50, the orthographic projection of the flow guide tube 60 is located within the orthographic projection of the interlayer 50. The perfusion material at the flow guide tube 60 can be completely blocked by the interlayer 50, further effectively improving the insulation effect of the interlayer 50 on the heat released by the perfusion material at the flow guide tube 60. The perfusion material discharged from the flow guide tube 60 cannot flow directly to the flow guide net 40. A part of the perfusion material discharged from the flow guide tube 60 can flow directly to the flow guide net 40 through the interlayer 50, and a part can flow from the interlayer 50 to the area where the interlayer 50 is not provided and then flow to the flow guide net 40. The interlayer 50 can effectively disperse the perfusion material discharged from the flow guide tube 60, which is conducive to improving the perfusion efficiency.

[0107] In some examples, more than two partitions 50 and more than two flow guide tubes 60 are arranged at intervals along the length direction of the blade mold 10. For example, the number of partitions 50 and the number of flow guide tubes 60 can be arranged in a one-to-one correspondence.

[0108] In some examples, the spacer 50 extends beyond the guide tube 60 by 1 mm or more. When the spacer 50 extends beyond the guide tube 60 by less than 1 mm, the spacer 50 has little effect on dispersing the injection material.

[0109] In some examples, the dimension of the partition 50 beyond the guide tube 60 is less than or equal to 10 mm. When the dimension of the partition 50 beyond the guide tube 60 is greater than 10 mm, the area of ​​the partition 50 itself is relatively large, so that most of the perfusion material needs to penetrate downward through the partition 50, resulting in low perfusion efficiency of the perfusion material, affecting the perfusion effect.

[0110] In some achievable ways, the interlayer 50 is provided in the region where the number of layers of the fiber reinforced layer 20 is greater than or equal to 40. The overall thickness of the region where the number of layers of the fiber reinforced layer 20 is greater than or equal to 40 is relatively large, so that the amount of infiltration of the perfusion material is relatively large, and thus the perfusion material in this region is relatively easily affected by external heat during the curing process. Therefore, the way of providing the interlayer 50 in the region where the number of layers of the fiber reinforced layer 20 is greater than or equal to 40 can effectively reduce the heat released by the perfusion material at the guide tube 60 from being conducted downward, which is conducive to reducing the possibility of local whitening caused by the curing process of the perfusion material being affected by external heat.

[0111] In some achievable ways, Fig. 9 Schematic diagram showing the local structure of wind turbine blade components during vacuum infusion molding process. Fig. 9 As shown, a fiber reinforced layer 20 is laid on a blade mold 10, and then a core material 90 is laid on the fiber reinforced layer 20, and then the fiber reinforced layer 20 is laid on the core material 90. The spacer 50 is arranged corresponding to the core material 90.

[0112] In the area where the core material 90 is arranged, the overall thickness formed by the fiber reinforced layer 20 and the core material 90 is relatively large, so that the amount of infiltration of the potting material is relatively large, so that the potting material in this area is relatively easily affected by external heat during the curing process. Therefore, the method of correspondingly arranging the partition layer 50 above the core material 90 can effectively reduce the heat released by the potting material at the guide tube 60 from being conducted downward, which is conducive to reducing the possibility of local whitening caused by the influence of external heat during the curing process of the potting material.

[0113] In some examples, the interlayer 50 is disposed corresponding to the region where the thickness of the core material 90 itself is greater than or equal to 35 mm.

[0114] In some examples, the core material 90 may be a balsa core material, such as a balsa core material. When the high-temperature infusion material infiltrates the core material 90, the water vapor overflowing from the core material 90 may generate bubbles in the infusion material. The interlayer 50 is arranged in a manner corresponding to the core material 90, and the bubbles generated in the infusion material may move to the bubble dispersion layer 52 and be dispersed and adsorbed by the bubble dispersion layer 52.

[0115] In some examples, core material 90 may be a foam core material.

[0116] In some practicable embodiments, the flow guide tube 60 and the partition layer 50 are connected by at least one of bonding and wire binding.

[0117] In some examples, the flow guide tube 60 is connected to the partition layer 50 by bonding. An adhesive may be provided on the partition layer 50, and then the flow guide tube 60 is bonded to the partition layer 50. The bonding method of the partition layer 50 and the flow guide tube 60 does not require an additional connection structure or an additional connector for each of the partition layer 50 and the flow guide tube 60, which is conducive to reducing the difficulty of processing and manufacturing the partition layer 50 and the flow guide tube 60, and is also conducive to reducing the number of parts used.

[0118] In some examples, the guide tube 60 is connected to the partition 50 by wire binding. After the guide tube 60 is placed on the partition 50, a wire is used to wrap the partition 50 and the guide tube 60 to fix the partition 50 and the guide tube 60. The guide tube 60 and the partition 50 are connected by wire, which can improve the connection stability and reliability of the partition 50 and the guide tube 60 and reduce the possibility of separation of the partition 50 and the guide tube 60 due to external force.

[0119] In some examples, the guide tube 60 is connected to the partition 50 by bonding or wire binding. After the partition 50 and the guide tube 60 are bonded, wires are used to wrap the partition 50 and the guide tube 60 to fix the partition 50 and the guide tube 60.

[0120] In some examples, the cross section of the flow guide tube 60 may be semicircular or V-shaped. A cavity is formed between the flow guide tube 60 and the barrier layer 50. An injection pipe may be connected to the middle of the flow guide tube 60 along the axial direction of the flow guide tube 60. The injection pipe is used to transport the injection material.

[0121] In some achievable ways, the partition layer 50 and the flow guide tube 60 are integrally formed. The connection between the partition layer 50 and the flow guide tube 60 is stable and not easy to separate. In some examples, the partition layer 50 and the flow guide tube 60 are manufactured by an integral injection molding process or a 3D printing process. In some examples, the material of the heat insulation layer 51 and the material of the flow guide tube 60 can be the same.

[0122] In some achievable ways, Fig.10 The partial structure of the flow guide tube 60 is schematically shown. Figure 7 and Fig.10 As shown, the flow guide tube 60 includes a first liquid outlet 61 and a second liquid outlet 62. The first liquid outlet 61 is arranged facing the barrier layer 50. The second liquid outlets 62 are respectively arranged on two end surfaces opposite to each other along the axial direction of the flow guide tube 60. The axial direction of the flow guide tube 60 can be perpendicular to the thickness direction Z of the barrier layer 50. The flow guide tube 60 can include a first liquid outlet 61 and two second liquid outlets 62.

[0123] The first liquid outlet 61 and the second liquid outlet 62 of the flow guide tube 60 are both used to discharge the perfusion material. The perfusion material discharged from the first liquid outlet 61 of the flow guide tube 60 can directly pass through the partition 50 to infiltrate the fiber reinforced layer 20 below. The perfusion material discharged from the second liquid outlet 62 of the flow guide tube 60 can first flow to the partition 50, then flow from the partition 50 to the area where the partition 50 is not set, and then infiltrate the fiber reinforced layer 20 below. The flow guide tube 60 and the partition 50 are used in conjunction with each other to effectively disperse the perfusion material, which is conducive to improving the perfusion efficiency.

[0124] In some achievable ways, Fig.11 The partial structure of the spacer 50 is schematically shown. Fig.11 As shown, the bubble dispersion layer 52 includes a first fiber layer formed by weaving warp and weft. The heat insulation layer 51 is connected to the first fiber layer. The bubble dispersion layer 52 is a woven structure. The bubble dispersion layer 52 formed by the weaving process can ensure the smooth penetration of the perfusion material and the effective dispersion and adsorption of bubbles. In some examples, the warp and weft can be fiber filaments or plastic wires. In some examples, the bubble dispersion layer 52 includes a first fiber layer.

[0125] In some achievable ways, Fig.12 The partial structure of the spacer 50 is schematically shown. Fig.12As shown, the bubble dispersion layer 52 includes a first fiber layer 521 and a second fiber layer 522. The first fiber layer 521 is formed by weaving warp and weft. The second fiber layer 522 is arranged between the two first fiber layers 521. The second fiber layer 522 supports the first fiber layer 521. The heat insulation layer 51 is connected to the first fiber layer 521. The bubble dispersion layer 52 can have more pores, which is conducive to improving the dispersion ability of the perfusion material and the bubble dispersion ability. The bubble dispersion layer 52 can have a larger surface area, which is conducive to improving the adsorption ability of small bubbles.

[0126] In some examples, the second fiber layer 522 includes randomly arranged fiber filaments. The randomly arranged fiber filaments are filled between the two first fiber layers 521. Random channels are formed in the second fiber layer 522, so that the second fiber layer 522 can penetrate the injection material.

[0127] In some examples, the first fiber layer 521 and the second fiber layer 522 are connected by bonding. Alternatively, the first fiber layer 521 and the second fiber layer 522 are an integrally formed structure. Exemplarily, the bubble dispersion layer 52 including the first fiber layer 521 and the second fiber layer 522 can be manufactured by 3D printing technology.

[0128] In some achievable ways, Fig.13 The partial structure of the heat insulation layer 51 is schematically shown. Fig.13 As shown, the heat insulating layer 51 includes a first through hole 51a. The first through hole 51a penetrates the heat insulating layer 51 along the thickness direction Z of the heat insulating layer 50. The first through hole 51a of the heat insulating layer 51 can ensure that the injection material can penetrate through the heat insulating layer 51 smoothly, reduce the flow resistance of the heat insulating layer 51 to the injection material, and ensure that the injection material has good injection efficiency.

[0129] In some examples, the heat insulating layer 51 includes more than two first through holes 51a. The more than two first through holes 51a may be distributed in an array.

[0130] In some examples, the cross-sectional area of ​​the first through hole 51a is S1. The orthographic projection area of ​​the heat insulating layer 51 along the thickness direction Z of the spacer 50 is S2. The value range of S1 / S2 is 0.000049 to 0.008, thereby ensuring that the heat insulating layer 51 has good penetration ability of the injection material and good heat insulation ability.

[0131] Exemplarily, the shape of the heat insulation layer 51 is rectangular. For example, the shape of the heat insulation layer 51 is rectangular. The axial direction of the flow guide tube 60 is the same as the length direction of the heat insulation layer 51. The first through hole 51a is a rectangular hole, for example, the first through hole 51a is a rectangular hole.

[0132] Exemplarily, the length of the thermal insulation layer 51 may range from 1 meter (m) to 4 meters. The width of the thermal insulation layer 51 may be 100 millimeters (mm). The thickness of the thermal insulation layer 51 may range from 3 millimeters to 10 millimeters. The length of the first through hole 51a may be 80 millimeters. The width of the first through hole 51a may be 10 millimeters. The length direction of the first through hole 51a is the same as the width direction of the thermal insulation layer 51. Along the length direction of the thermal insulation layer 51, more than two first through holes 51a are spaced apart. The hole spacing between two adjacent first through holes 51a is 20 millimeters. The distance between the first through hole 51a and the edge of the thermal insulation layer 51 may be 10 millimeters.

[0133] For example, Fig.14 The partial structure of the heat insulation layer 51 is schematically shown. Fig.14 As shown, the shape of the heat insulating layer 51 is rectangular. For example, the shape of the heat insulating layer 51 is rectangular. The first through hole 51a is a circular hole.

[0134] Exemplarily, the length of the thermal insulation layer 51 may range from 1 meter (m) to 4 meters. The width of the thermal insulation layer 51 may range from 100 millimeters (mm). The thickness of the thermal insulation layer 51 may range from 3 millimeters to 10 millimeters. The diameter of the first through hole 51a may range from 5 millimeters to 10 millimeters. More than two first through holes 51a are spaced apart. The hole spacing between two adjacent first through holes 51a is 10 millimeters. The dimension between the first through hole 51a closest to the edge of the thermal insulation layer 51 and the edge of the thermal insulation layer 51 may be 10 millimeters.

[0135] In some achievable ways, Fig.15 The local structure of the bubble dispersion layer 52 is schematically shown. Fig.15 As shown, the bubble dispersion layer 52 includes a second through hole 52a. Along the thickness direction Z of the interlayer 50, the second through hole 52a penetrates the bubble dispersion layer 52. The first through hole 51a of the heat insulating layer 51 is connected to the second through hole 52a of the bubble dispersion layer 52. The second through hole 52a of the bubble dispersion layer 52 can ensure that the perfusion material can penetrate through the bubble dispersion layer 52 smoothly, reduce the flow resistance of the bubble dispersion layer 52 to the perfusion material, and ensure that the perfusion material has a good perfusion efficiency. At the same time, during the perfusion material injection stage, the second through hole 52a of the bubble dispersion layer 52 can be used to disperse large bubbles so that the large bubbles are dispersed into small bubbles.

[0136] In some examples, the cross-sectional area of ​​the second through hole 52a is S11. The orthographic projection area of ​​the bubble dispersion layer 52 along the thickness direction Z of the barrier layer 50 is S22. The value range of S11 / S22 is 0.00000785 to 0.00003, thereby ensuring that the bubble dispersion layer 52 has good permeability of the injection material and good dispersion ability.

[0137] In some examples, the shape of the bubble dispersion layer 52 is rectangular. For example, the shape of the bubble dispersion layer 52 is rectangular. The number of the second through holes 52a is two or more. At least two second through holes 52a are interconnected, which is conducive to improving the permeability of the perfusion material of the bubble dispersion layer 52. Exemplarily, the shape of the bubble dispersion layer 52 can be the same as the shape of the thermal insulation layer 51. Along the thickness direction Z of the insulation layer 50, the orthographic outer contour of the bubble dispersion layer 52 coincides with the orthographic outer contour of the thermal insulation layer 51.

[0138] For example, the length of the bubble dispersion layer 52 may range from 1 meter (m) to 4 meters, the width of the bubble dispersion layer 52 may range from 100 millimeters (mm), and the thickness of the bubble dispersion layer 52 may range from 1 millimeter to 10 millimeters.

[0139] Exemplarily, the cross section of the second through hole 52a is circular. The diameter of the second through hole 52a is 2 mm. Two or more second through holes 52a are arranged at intervals. The hole spacing between two adjacent second through holes 52a ranges from 2 mm to 10 mm.

[0140] In some achievable methods, the thickness of the thermal insulation layer 51 ranges from 3 mm to 10 mm. When the thickness of the thermal insulation layer 51 is less than 3 mm, the structural strength of the thermal insulation layer 51 itself is relatively small, so that when the thermal insulation layer 51 is subjected to a pulling force, the thermal insulation layer 51 is prone to breakage and failure. When the thickness of the thermal insulation layer 51 is greater than 10 mm, the flow resistance of the thermal insulation layer 51 to the pouring material increases, affecting the pouring efficiency of the pouring material. Therefore, the method in which the thickness of the thermal insulation layer 51 ranges from 3 mm to 10 mm can effectively solve the above problems.

[0141] In some achievable embodiments, the bubble dispersion layer 52 has a thickness ranging from 1 mm to 10 mm.

[0142] When the thickness of the bubble dispersion layer 52 is less than 1 mm, the structural strength of the bubble dispersion layer 52 itself is relatively small, so that when the bubble dispersion layer 52 is subjected to a pulling force, the bubble dispersion layer 52 is easy to break and fail. When the thickness of the bubble dispersion layer 52 is greater than 10 mm, the flow resistance of the bubble dispersion layer 52 to the injection material increases, affecting the injection efficiency of the injection material. Therefore, the method of setting the thickness of the bubble dispersion layer 52 in the range of 1 mm to 10 mm can effectively solve the above problem.

[0143] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A vacuum infusion molding method for wind turbine blade components, characterized in that: include: Provide blade molds; Laying a fiber reinforcement layer on the blade mold; Laying a release cloth on the fiber-reinforced layer; Laying a guide net on the release cloth; Laying an interlayer on a local area of ​​the guide net, wherein the interlayer comprises an air bubble dispersion layer and an insulation layer, and the air bubble dispersion layer and the insulation layer are connected; A flow guide pipe is arranged on the partition layer, and the flow guide pipe is located on a side of the partition layer facing away from the flow guide net; Laying vacuum bag film; Using a vacuum pump to evacuate air so that the vacuum bag film is under negative pressure; A potting material is provided, and the potting material is injected through the guide tube. The potting material infiltrates the fiber reinforcement layer and is cured to form a blade component.

2. The vacuum infusion molding method for wind turbine blade components according to claim 1, characterized in that: The heat insulating layer is disposed on one side of the bubble dispersion layer; or, the heat insulating layers are disposed on two opposite sides of the bubble dispersion layer.

3. The vacuum infusion molding method for wind turbine blade components according to claim 1, characterized in that: The bubble dispersion layer and the heat insulation layer are bonded together; or, the bubble dispersion layer and the heat insulation layer are integrally formed.

4. The vacuum infusion molding method for wind turbine blade components according to claim 1, characterized in that: Along the thickness direction of the partition layer, the orthographic projection of the flow guide tube is located within the orthographic projection of the partition layer.

5. The vacuum infusion molding method for wind turbine blade components according to claim 4, characterized in that: The dimension of the partition layer exceeding the guide tube is greater than or equal to 1 mm.

6. The vacuum infusion molding method for wind turbine blade components according to claim 1, characterized in that: The interlayer is correspondingly arranged in the region where the number of layers of the fiber reinforced layer is greater than or equal to 40 layers; and / or, The fiber reinforced layer is laid on the blade mold, the core material is laid on the fiber reinforced layer, the fiber reinforced layer is laid on the core material, and the partition layer is arranged corresponding to the core material.

7. The vacuum infusion molding method for wind turbine blade components according to claim 1, characterized in that: The guide tube and the partition layer are connected by at least one of bonding and wire binding; or the partition layer and the guide tube are integrally formed.

8. The vacuum infusion molding method for wind turbine blade components according to claim 1, characterized in that: The bubble dispersion layer includes a first fiber layer formed by weaving warp and weft; or, the bubble dispersion layer includes a first fiber layer and a second fiber layer, the first fiber layer is formed by weaving warp and weft, the second fiber layer is arranged between two first fiber layers, and the second fiber layer supports the first fiber layer; The heat insulating layer is connected to the first fiber layer.

9. The vacuum infusion molding method for wind turbine blade components according to claim 1, characterized in that: The flow guide tube comprises a first liquid outlet and a second liquid outlet, wherein the first liquid outlet is arranged facing the partition layer, and the second liquid outlet is respectively arranged on two end surfaces opposite to each other along the axial direction of the flow guide tube.

10. The vacuum infusion molding method for wind turbine blade components according to claim 1, characterized in that: The heat insulating layer comprises a first through hole, and the first through hole penetrates the heat insulating layer along the thickness direction of the heat insulating layer.

11. The vacuum infusion molding method for wind turbine blade components according to claim 10, characterized in that: The cross-sectional area of ​​the first through hole is S1, and the orthographic projection area of ​​the thermal insulation layer along the thickness direction of the insulation layer is S2, wherein the value range of S1 / S2 is 0.000049 to 0.

008.

12. The vacuum infusion molding method for wind turbine blade components according to claim 10 or 11, characterized in that: The heat insulation layer is in a rectangular shape, and the first through hole is a rectangular hole or a circular hole.

13. The vacuum infusion molding method for wind turbine blade components according to claim 1, characterized in that: The bubble dispersion layer includes a second through hole, and the second through hole penetrates the bubble dispersion layer along the thickness direction of the partition layer.

14. The vacuum infusion molding method for wind turbine blade components according to claim 13, characterized in that: The cross-sectional area of ​​the second through hole is S11, and the orthographic projection area of ​​the bubble dispersion layer along the thickness direction of the partition layer is S22, wherein the value range of S11 / S22 is 0.00000785 to 0.00003.

15. The vacuum infusion molding method for wind turbine blade components according to claim 13 or 14, characterized in that: The bubble dispersion layer is in a rectangular shape, the number of the second through holes is two or more, and at least two of the second through holes are interconnected.

16. The vacuum infusion molding method for wind turbine blade components according to claim 1, characterized in that: The thickness of the heat insulation layer ranges from 3 mm to 10 mm; and / or the thickness of the bubble dispersion layer ranges from 1 mm to 10 mm.

17. The vacuum infusion molding method for wind turbine blade components according to claim 1, characterized in that: A porous isolation membrane is laid on the release cloth, and a flow guide net is laid on the porous isolation membrane.

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