Blade web plate, manufacturing method of die of blade web plate, blade and wind generating set

Abstract

The invention relates to a blade web, a manufacturing method of a die of the blade web, a blade and a wind generating set. The method comprises the steps that a test web is provided; arranging a test web at a preset position of the first shell; a bonding layer is arranged at the preset position of the second shell, the first shell and the second shell are subjected to mold closing, and the height of the web plate is tested to be smaller than the inner wall distance between the first shell and the second shell after mold closing at the preset position; obtaining a gap value between the test web and the bonding layer; when the gap value exceeds the threshold value range, the test web is adjusted until the test web abuts against the bonding layer; and taking out the test web, and manufacturing a blade web mold with the same size according to the size of the test web. The embodiment of the invention provides a blade web plate, a manufacturing method of a die of the blade web plate, a blade and a wind generating set, the web plate can meet the bonding requirement in the die assembly process of the blade, and the production quality of the blade is improved.

Description

Technical Field

[0001] The present application relates to the technical field of wind power generation, and in particular to a method for preparing a blade web and a mold thereof, a blade and a wind power generator set. Background Art

[0002] The web of a wind turbine blade is the main bearing structure of the blade shear force. The web is formed by vacuum infusion in a fiberglass or steel mold, and then bonded to the blade using structural adhesive. The web is connected between the windward shell and the leeward shell of the blade to connect the blade into a whole.

[0003] In the prior art, when the windward shell and the leeward shell of the blade are molded together, if the web is higher, the web will be crushed during the bonding process of the web and the shell; if the web is lower, a large bonding gap will appear between the web and the shell, which does not meet the standard bonding gap requirements and seriously reduces the production quality of the blade. Summary of the invention

[0004] The embodiments of the present application provide a method for preparing a blade web and a mold thereof, a blade and a wind turbine generator set, which can enable the web to meet the bonding requirements during the blade mold closing process and improve the production quality of the blade.

[0005] In a first aspect, according to an embodiment of the present application, a method for preparing a mold of a blade web is provided, wherein the blade web is used to connect between a first shell and a second shell at a predetermined position of the blade, and the preparation method comprises:

[0006] Provide test belly plate;

[0007] Disposing the test web at a predetermined position of the first shell;

[0008] An adhesive layer is provided at a predetermined position of the second shell, and the first shell and the second shell are molded together, and the height of the test web is smaller than the inner wall distance between the first shell and the second shell after the mold is closed at the predetermined position;

[0009] Obtaining the gap value between the test web and the bonding layer;

[0010] When the gap value exceeds the threshold range, the test web is adjusted until the test web abuts against the adhesive layer;

[0011] The test web is taken out, and a mold of a blade web of equal size is made according to the size of the test web.

[0012] According to one aspect of an embodiment of the present application, the step of providing a test web comprises:

[0013] Acquire the inner wall distance between the first shell and the second shell at a predetermined position;

[0014] The inner wall distance is reduced by a predetermined dimension to obtain the height value of the test web;

[0015] A mold of the test web is manufactured according to the height value of the test web;

[0016] The test web is formed using a test web mold.

[0017] According to one aspect of an embodiment of the present application, the step of obtaining the inner wall distance between the first shell and the second shell at a predetermined position includes:

[0018] Simulating a three-dimensional model of a test web at a predetermined position according to the actual structure of the first shell and the second shell;

[0019] The inner wall distance between the first shell and the second shell is obtained according to the three-dimensional model of the test web.

[0020] According to one aspect of an embodiment of the present application, the step of reducing the inner wall distance by a predetermined size includes: reducing the inner wall distance between the first shell and the second shell by 10 mm-30 mm in directions toward each other.

[0021] According to one aspect of an embodiment of the present application, the step of disposing the test web at a predetermined position of the first shell includes:

[0022] A plurality of positioning blocks are arranged in the first housing, and a predetermined position is defined by the plurality of positioning blocks;

[0023] The test web is hoisted to a predetermined position by a pressing tool and is pressed downward to bond the test web to the first shell. The pressing tool can obtain information of the predetermined position.

[0024] According to one aspect of an embodiment of the present application, the step of setting the test web at a predetermined position of the first shell further includes: after the test web is set at the predetermined position, setting a plurality of fixing parts between the test web and the first shell to fix the test web.

[0025] According to one aspect of the embodiment of the present application, the adhesive layer includes a first adhesive layer and a second adhesive layer stacked together, the adhesive layer is arranged at a predetermined position of the second shell, and the step of molding the first shell and the second shell includes:

[0026] Arranging a first adhesive layer at a predetermined position of the second shell, closing the mold of the second shell with the first shell, and measuring the distance between the test web and the first adhesive layer;

[0027] When the distance between the test web and the first adhesive layer reaches a threshold range, the second shell and the first shell are opened, and the second adhesive layer is stacked at the first adhesive layer;

[0028] The second shell is molded together with the first shell again so that the test web abuts against the second adhesive layer.

[0029] According to one aspect of an embodiment of the present application, the step of measuring the distance between the test web and the first adhesive layer includes: when the distance is zero, lowering the height of the test web until the distance reaches a threshold range.

[0030] According to one aspect of an embodiment of the present application, the step of making a mold of a blade web of equal size according to the size of the test web comprises:

[0031] Obtain a support plate at the same height as the test web;

[0032] The two flange plates are connected to both sides of the support plate in its height direction according to the flange angle of the test web plate, so as to obtain a blade web mold with the same size as the test web plate.

[0033] According to one aspect of an embodiment of the present application, the step of making a mold of a blade web of equal size according to the size of the test web also includes: providing a support member between the support plate and the flange plate, the support member being capable of supporting the flange plate on the support plate.

[0034] In a second aspect, according to an embodiment of the present application, a method for preparing a blade web is proposed, comprising:

[0035] Obtain a blade web mold according to the preparation method described above;

[0036] The blade web is injection molded in a blade web mold.

[0037] In a third aspect, according to an embodiment of the present application, a blade is proposed, comprising a first shell, a second shell and a blade web as described above, wherein the blade web is connected between the first shell and the second shell after mold closing.

[0038] In a fourth aspect, according to an embodiment of the present application, a wind turbine generator set is proposed, comprising the blades as described above.

[0039] The embodiments of the present application provide a method for preparing a blade web and a mold thereof, a blade and a wind turbine generator set. First, a test web is prepared. After the test web is shortened, it is set at a predetermined position of a first shell to carry out a blade mold test, so that the height of the test web is less than the inner wall distance between the first shell and the second shell after the mold is closed at the predetermined position, thereby avoiding the mold lifting phenomenon during the mold closing process and preventing the problem of being unable to close the mold. At the same time, the test web is tested for mold closing using the adhesive layer of the second shell to ensure that the bonding between the test web and the first shell and the second shell meets the specification requirements. After obtaining a test web that meets the requirements, a blade web mold is prepared. Finally, a blade web suitable for the predetermined position is obtained according to the mold, so that the blade web is easier to meet the bonding requirements and the overall production quality of the blade is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0041] Figure 1 is a flow chart of a method for preparing a blade web mold according to an embodiment of the present application;

[0042] Figure 2 is a schematic structural diagram of a test web according to an embodiment of the present application;

[0043] Figure 3 is a process diagram of a method for preparing a blade web mold according to an embodiment of the present application;

[0044] Figure 4 is a process diagram of a method for preparing a blade web mold according to an embodiment of the present application;

[0045] Figure 5 is a process diagram of a method for preparing a blade web mold according to an embodiment of the present application;

[0046] Figure 6 is a process diagram of a method for preparing a blade web mold according to an embodiment of the present application;

[0047] Figure 7 is a structural diagram of a mold of a blade web in an embodiment of the present application;

[0048] Figure 8 is a flow chart of a method for preparing a blade web mold according to an embodiment of the present application;

[0049] Fig. 9 is a flow chart of a method for preparing a blade web mold according to an embodiment of the present application;

[0050] Fig.10 is a flow chart of a method for preparing a blade web mold according to an embodiment of the present application;

[0051] Fig.11 This is a flow chart of a method for preparing a blade web mold according to an embodiment of the present application.

[0052] Reference numerals:

[0053] 1-first shell; 2-second shell; 3-test web; 4-adhesive layer;

[0054] 10-blade web mold; 11-support plate; 12-flange plate; 13-support member.

[0055] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0056] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0057] The directional words appearing in the following description are all directions shown in the figures, and do not limit the method for preparing the blade web and its mold, the blade and the wind turbine generator set of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0058] In order to better understand this application, Figures 1 to 11 The blade web and its mold preparation method, blade and wind turbine generator set according to the embodiments of the present application are described in detail.

[0059] See also Figure 1 The embodiment of the present application provides a method for preparing a blade web mold 10, wherein the blade web is used to connect between a first shell 1 and a second shell 2 at a predetermined position of the blade, and the preparation method includes:

[0060] S1. Provide a test web 3;

[0061] S2, setting the test web 3 at a predetermined position of the first shell 1;

[0062] S3, setting an adhesive layer 4 at a predetermined position of the second shell 2, closing the mold of the first shell 1 and the second shell 2, and the height of the test web 3 is smaller than the inner wall distance between the first shell 1 and the second shell 2 after closing the mold at the predetermined position;

[0063] S4, obtaining the gap value between the test web 3 and the adhesive layer 4;

[0064] S5. When the gap value exceeds the threshold range, the test web 3 is adjusted until the test web 3 abuts against the adhesive layer 4;

[0065] S6 , taking out the test web 3 , and making a blade web mold 10 of equal size according to the size of the test web 3 .

[0066] There are various web structures in the blade. The blades are mainly divided into single web structure, double web structure, triple web structure, quad web structure, etc. according to the number of webs. The webs have different positions in the blade shell, such as leading edge webs, trailing edge webs, etc.

[0067] The blade ventral plate is connected between the first shell 1 and the second shell 2 of the blade. Optionally, the first shell 1 can be the windward shell of the blade, and the second shell 2 can be the leeward shell of the blade. The blade ventral plate is mainly connected between the first shell 1 and the second shell 2 by bonding.

[0068] Among them, the predetermined position of the blade web can be multiple positions such as the leading edge position or the trailing edge position. Different positions have bonding areas for bonding the blade web. The heights and flange angles of the blade webs at different positions are different. Therefore, it is necessary to conduct separate pre-mold testing on the blade webs at different positions to meet the bonding requirements of the blade webs at the predetermined positions.

[0069] In this embodiment, a test web 3 is first provided, and its structure is as follows: Figure 2 As shown, optionally, in step S1, the mold of the test belly plate 3 can be firstly used to infuse the test belly plate 3 in the mold of the test belly plate 3 through a vacuum infusion process. The test belly plate 3 can be a process belly plate, and its material is glass fiber + resin + core material. The test belly plate 3 has a certain strength but does not play a structural role. It is used to adjust the shape, size and angle of the belly plate, so that the belly plate can meet the bonding requirements at the final predetermined position.

[0070] The function of the test web 3 is to simulate the position and force of the actual blade web in the blade shell, and then adjust the parameters such as the size and flange angle of the test web 3 according to the actual scenario to meet the required specifications of the web. Finally, the actual blade web is obtained according to the shape of the test web 3 to meet the actual bonding requirements of the blade web in the blade shell and improve the process quality.

[0071] After the formed test web 3 is obtained, it needs to be hoisted to a predetermined position of the first shell 1 in order to simulate the application environment of the web. Figure 3 and Figure 4 As shown, optionally, the test web 3 is bonded to the first shell 1 at a predetermined position, that is, a bonding area of ​​the first shell 1 .

[0072] Optionally, in step S2, a 5 mm thick soft rubber is laid in the bonding area at the predetermined position of the first shell 1, a vacuum film or an isolation film is laid on the rubber, a sufficient amount of two-component structural adhesive is placed in the web bonding area on the vacuum film or the isolation film, the test web 3 is placed in the bonding area at the predetermined position of the first shell 1, and the test web 3 is compacted and bonded to the first shell 1 using an adjusted pressing tool.

[0073] Then in step S3, Figure 5 As shown, an adhesive layer 4 is provided at a corresponding position of the second shell 2, and the second shell 2 and the first shell 1 are subjected to a trial mold closing process. It needs to be determined that the height of the test web 3 bonded to the first shell 1 is smaller than the inner wall distance between the first shell 1 and the second shell 2 after the mold closing, so as to avoid the situation in which the mold cannot be closed due to the mold lifting of the test web 3 during the mold closing process. It can be seen that the test web 3 needs to be shortened during the molding design.

[0074] In step S4, it is necessary to measure the distance between the test web 3 and the adhesive layer 4 on the second shell 2 after mold closing. The staff can use a handheld ruler to measure and obtain the gap value between the two. The gap value here needs to meet the specification requirements. Usually, the gap value is ensured to be greater than 2 mm at all positions.

[0075] If the threshold range requirement is not met, the first shell 1 and the second shell 2 that have been molded need to be opened, and the size structure of the test web 3 therein needs to be adjusted, which may be done through reverse mold adjustment. After multiple mold trials, the second shell 2 is finally bonded to the test web 3 through the adhesive layer 4, and the test web 3 can be abutted against the second shell 2 to obtain the structure of the test web 3 required at the final predetermined position, such as Figure 6 shown.

[0076] Since the test web 3 is only for simulation and has no supporting structure, in step S6, the mold of the first shell 1 and the second shell 2 needs to be opened and the test web 3 is taken out, and the mold 10 of the blade web is made according to the structural contour of the test web 3 to obtain the mold 10 of the blade web at the predetermined position. Figure 7 shown.

[0077] Optionally, the blade web mold 10 is infused using a vacuum infusion process to obtain a blade web with the same structural dimensions as the test web 3, which can meet the bonding requirements required by the specification at a predetermined position, thereby improving the bonding quality of the blade web at the predetermined position.

[0078] The embodiment of the present application provides a method for preparing a mold 10 for a blade web, first preparing a test web 3, and after shortening the test web 3, setting it at a predetermined position of the first shell 1 to carry out a blade mold test, so that the height of the test web 3 is smaller than the inner wall distance between the first shell 1 and the second shell 2 after mold closing at the predetermined position, thereby avoiding the mold lifting phenomenon that occurs during the mold closing process and preventing the problem of being unable to close the mold. At the same time, the adhesive layer 4 of the second shell 2 is used to test the test web 3 to ensure that the bonding between the test web 3 and the first shell 1 and the second shell 2 meets the specification requirements. After obtaining the test web 3 that meets the requirements, a blade web mold is prepared, and finally a blade web suitable for the predetermined position is obtained according to the mold, so that the blade web is easier to meet the bonding requirements and the overall production quality of the blade is improved.

[0079] As an alternative embodiment, see Figure 8 , the step of providing the test web 3 comprises:

[0080] S11, obtaining the inner wall distance between the first shell 1 and the second shell 2 at a predetermined position;

[0081] S12, reducing the inner wall distance by a predetermined dimension to obtain a height value of the test web 3;

[0082] S13, making a mold of the test web 3 according to the height value of the test web 3;

[0083] S14, forming the test web 3 using the mold of the test web 3.

[0084] During the molding process of the test web 3, firstly, the inner wall distance between the first shell 1 and the second shell 2 is measured in step S11 to obtain the height value at the predetermined position. Then, considering that the test web 3 is bonded to the first shell 1, in order to ensure that the test web 3 does not cause adverse effects of mold lifting on the second shell 2 during the mold closing process with the second shell 2, it is necessary to make the height of the test web 3 lower than the inner wall distance between the first shell 1 and the second shell 2, so as to avoid contact between the test web 3 and the second shell 2 during the mold closing.

[0085] Therefore, in step S12, after obtaining the actual spacing between the first shell 1 and the second shell 2, the value is appropriately reduced to obtain the required height value of the test web 3. The present application does not impose any special restrictions on the reduced value, as long as it can avoid structural interference between the test web 3 and the second shell 2 during mold closing.

[0086] After obtaining the required height value of the test web 3 at the predetermined position, the mold required for the test web 3 is manufactured according to the size. Optionally, a web mold frame and a web mold plane are manufactured using steel plates, and the web mold plane is scanned using a detection device to ensure the flatness of the web mold plane. The mold flange edge of the test web 3 is welded to the web mold plane using argon arc welding according to the data measured at the predetermined position, and finally the mold of the test web 3 is obtained.

[0087] In step S14, a test web 3 is manufactured on the mold of the prefabricated test web 3 using a vacuum infusion process, in preparation for the subsequent manufacture of the blade web.

[0088] The embodiment of the present application provides a method for preparing a blade belly mold 10, and provides a method for making the height value of the test belly 3 smaller than the distance between the inner walls of the first shell 1 and the second shell 2. By making the mold of the test belly 3, the height of the formed test belly 3 is reduced, thereby avoiding the situation of mold lifting during the mold closing process of the first shell 1 and the second shell 2, improving the success rate of the mold closing, and forming a certain protection for the internal belly structure to prevent damage after mold lifting.

[0089] As an optional embodiment, the step of obtaining the inner wall distance between the first shell 1 and the second shell 2 at a predetermined position includes:

[0090] S111, simulating a three-dimensional model of the test web 3 at a predetermined position according to the actual structure of the first shell 1 and the second shell 2;

[0091] S112 , obtaining the inner wall distance between the first shell 1 and the second shell 2 according to the three-dimensional model of the test web 3 .

[0092] Optionally, a three-dimensional model of the web 3 is simulated and tested, and the shape of the web 3 is three-dimensionally simulated and tested based on the blade shape plus the thickness of the blade shell structure, from the web root to the web tip. The simulation result is based on the root end of the blade web, and a web section with a spacing of 1m is obtained for simulation.

[0093] By simulating the structure of the test web 3 at the predetermined position using a three-dimensional model, the inner wall distance between the first shell 1 and the second shell 2 at the predetermined position is obtained, and the molding height value of the test web 3 is obtained by reduction on this basis.

[0094] An embodiment of the present application provides a method for preparing a blade belly plate mold 10, by performing three-dimensional simulation on a predetermined position of the blade to obtain the inner wall spacing between the first shell 1 and the second shell 2, and adjusting the height value of the test belly plate 3 on this basis, the designed height value can be obtained more accurately, so that the design of the test belly plate 3 is closer to the actual application environment and has higher detection accuracy.

[0095] As an optional embodiment, the step of reducing the inner wall distance by a predetermined size includes: reducing the inner wall distance between the first shell 1 and the second shell 2 by 10 mm-30 mm in directions toward each other.

[0096] Optionally, based on the three-dimensional simulation of the test belly 3, the two ends of the test belly 3 close to the first shell 1 and the second shell 2 are reduced by 10mm to 30mm respectively to make a mold for the test belly 3 whose actual width is 20mm to 60mm lower than the simulated height. In this way, a test belly 3 that is 20mm to 60mm lower than the simulated height can be obtained, which can prevent the manufactured test belly 3 from interfering with the blade shell during the mold closing process.

[0097] As an alternative embodiment, see Fig. 9 Combined with Figure 4 The step of arranging the test web 3 at a predetermined position of the first shell 1 includes:

[0098] S21, setting a plurality of positioning blocks in the first housing 1, and defining a predetermined position by the plurality of positioning blocks;

[0099] S22 , using a pressing tool to lift the test web 3 to a predetermined position and press down the test web 3 to bond the test web 3 to the first shell 1 . The pressing tool can obtain information of the predetermined position.

[0100] Before the formed test web 3 is transferred and bonded to the first shell 1, web chordal positioning blocks are placed at the front and rear edges, starting point and end point of the web bonding area of ​​the first shell 1 according to the horizontal distance between the test web 3 and the front edge of the first shell 1, thereby defining the position trajectory of the test web 3 on the first shell 1 and ensuring the accuracy of the chordal positioning and axial positioning of the bonding of the test web 3. Optionally, the positioning block is D-shaped or has other shapes.

[0101] After positioning the test web 3 using the positioning block, the test web 3 is hoisted to the predetermined position of the first shell 1, and then the web pressing fixture is adjusted to press the test web 3 down to the rubber surface of the first shell 1, ensuring that the pressing point of the web pressing fixture is positioned in the chord direction on the test web 3, the axial position and the contact surface position of the test web 3. Optionally, the web pressing fixture can be a split pressing fixture or an integrated pressing fixture.

[0102] The adjusted pressing tool can press down the finally formed blade web according to the set position information, so as to ensure that the position of the blade web in the first shell 1 has higher accuracy.

[0103] An embodiment of the present application provides a method for preparing a blade web mold 10, by setting a positioning block in the first shell 1 and defining a predetermined position, thereby ensuring the accuracy of the position of the test web 3 in the first shell 1, and then adjusting the common pressing tool according to the position information of the test web 3, so that in the final blade web bonding process, the pressing tool can press down the blade web according to the setting, thereby improving the position accuracy of the blade web and avoiding position offset in the first shell 1.

[0104] As an optional embodiment, the step of setting the test belly plate 3 at a predetermined position of the first shell 1 also includes: after the test belly plate 3 is set at the predetermined position, a plurality of fixing parts are set between the test belly plate 3 and the first shell 1 to fix the test belly plate 3.

[0105] Optionally, at the bonding surface between the test web 3 and the first shell 1, four layers of 0.5m long and 0.2m wide fiberglass cloth are hand-laid on the outer sides of all the test webs 3 every 2m to 3m along the length direction of the test web 3 by hand-layup process to fix the test web 3 on the first shell 1, and heat and cure.

[0106] An embodiment of the present application provides a method for preparing a mold 10 for a blade belly plate, wherein a fixing portion is provided between the test belly plate 3 and the first shell 1, so that the test belly plate 3 is reinforced on the first shell 1, thereby improving the stability of the bonding of the test belly plate 3, avoiding the instability of the test belly plate 3, and providing reliable protection for the subsequent trial molding process.

[0107] As an alternative embodiment, see Fig.10 Combined with Figure 5 and Figure 6 The adhesive layer 4 includes a first adhesive layer and a second adhesive layer which are stacked, and the adhesive layer 4 is arranged at a predetermined position of the second shell 2. The steps of molding the first shell 1 and the second shell 2 include:

[0108] S31, setting a first adhesive layer at a predetermined position of the second shell 2, closing the second shell 2 with the first shell 1, and measuring the distance between the test web 3 and the first adhesive layer;

[0109] S32, when the distance between the test web 3 and the first adhesive layer reaches a threshold range, the second shell 2 and the first shell 1 are opened, and a second adhesive layer is stacked on the first adhesive layer;

[0110] S33, closing the second shell 2 and the first shell 1 again so that the test web 3 abuts against the second adhesive layer.

[0111] Optionally, in step S31, the first adhesive layer provided on the second shell 2 is a single-component adhesive, and after the test web 3 is bonded to the first shell 1, the web pressing tool is removed, and the first adhesive layer is placed in the bonding area of ​​the second shell 2, and a single-component adhesive pressing experiment is used to check the bonding gap between the test web 3 and the second shell 2.

[0112] When the above gap is zero, it is proved that there is a contact point between the test web 3 and the second shell 2, so the height of the test web 3 needs to be lowered until the distance reaches the threshold range.

[0113] Optionally, when there is a mold support point, the end of the test web 3 close to the second shell 2 is polished or cut off to reduce the height of the mold support point of the test web 3, and the mold is retested to detect the gap until all the mold gaps on the test web 3 are ≥2mm.

[0114] When the first adhesive layer is used for single-component lamination, plasticine is placed every 1m in the length direction of the first adhesive layer. The purpose is to be able to use a vernier caliper and a ruler to detect the actual bonding gap and provide a glue application amount benchmark for the subsequent two-component structural adhesive lamination on the first adhesive layer and the second adhesive layer.

[0115] After the bonding gap between the tested web 3 and the first adhesive layer on the second shell 2 is ≥2mm, steps S32 and S33 are performed. Optionally, a 5mm thick rubber is placed on the entire bonding area of ​​the second shell 2, and then a vacuum film or an isolation film is placed on the rubber. Then a second adhesive layer is applied on the vacuum film or the isolation film to form a two-component structural adhesive with the first adhesive layer. The second shell 2 is turned over to perform a trial mold of the two-component adhesive, so that after the trial mold, the two-component adhesive is bonded to the test web 3 and heated to cure, finally forming an abutment between the test web 3 and the second adhesive layer, so that the test web 3 is bonded between the first shell 1 and the second shell 2, and the bonding requirements are met.

[0116] An embodiment of the present application provides a method for preparing a mold 10 for a blade belly plate. By setting a first adhesive layer and a second adhesive layer on the second shell 2, a trial mold closing process for a test belly plate 3 is realized, so that the test belly plate 3 meets the bonding requirements of the mold closing after adjustment, reaches the bonding specification standards, and has higher molding quality.

[0117] As an alternative embodiment, see Fig.11 Combined with Figure 7 The steps of making a mold 10 of a blade web of equal size according to the size of the test web 3 include:

[0118] S61, obtaining a support plate 11 having the same height as the test web 3;

[0119] S62 , connecting two flange plates 12 to both sides of the support plate 11 in its own height direction according to the flange angle of the test web 3 , so as to obtain a blade web mold 10 with the same size as the test web 3 .

[0120] Place the taken out test web 3 on the mold surface, first use an iron block or a fiberglass block to support the flange surface of one end of the test web 3 every 1 meter in the length direction, and use a flange plate 12 to press against the test web 3 on the other side, use a tool to bend the flange plate 12 to follow the flange of the test web 3, and then press against the flange edge of the test web 3, and weld the flange plate 12 of the blade web mold 10 to the support plate 11. The flange plate 12 at the other end of the mold 10 for making the blade web can be adjusted by the same method to follow the flange of the mold and weld the flange plate 12 at this end.

[0121] In summary, the blade web mold 10 can be welded and manufactured according to the height dimension and flange angle of the test web 3 obtained above, and after the support plate 11 and the flange plate 12 are welded, a blade web mold 10 with the same size as the test web 3 is obtained.

[0122] An embodiment of the present application provides a method for preparing a blade web mold 10, by performing conformal molding of the blade web 10 in equal size according to the size of a test web 3, so that the blade web mold 10 is closer to the test web 3, and the formed blade web can better meet the bonding requirements at a predetermined position in the blade shell, thereby making the blade web mold 10 more accurate.

[0123] As an alternative embodiment, see Figure 7 The step of making a mold 10 of a blade web of equal size according to the size of the test web 3 also includes: arranging a support member 13 between the support plate 11 and the flange plate 12, and the support member 13 can support the flange plate 12 on the support plate 11.

[0124] Optionally, the support member 13 is a triangular iron structure, and a triangular iron is welded every 1m between the flange plate 12 of the mold and the support plate 11 to fix and strengthen the web mold flange plate 12 to prevent the web mold flange from being deformed due to repeated heating, cooling and web demolding.

[0125] An embodiment of the present application provides a method for preparing a blade belly plate mold 10. By setting a support member 13 between a support plate 11 and a flange plate 12 of the mold, better support and protection can be provided to the flange plate 12, preventing the mold from deforming during use, avoiding failure of the mold structure, and improving the stability of the mold.

[0126] According to an embodiment of the present application, a method for preparing a blade web is proposed, comprising: obtaining a blade web mold 10 according to the preparation method described above; and pouring and molding the blade web in the blade web mold 10 .

[0127] Optionally, after the blade web mold 10 is obtained according to the above steps, vacuum infusion is performed on it to obtain a blade web with the same size and angle as the test web 3 to meet the bonding requirements at the predetermined position.

[0128] According to an embodiment of the present application, a blade is proposed, comprising a first shell 1, a second shell 2 and a blade web as described above, wherein the blade web is connected between the first shell 1 and the second shell 2 after mold closing.

[0129] According to an embodiment of the present application, a wind turbine generator set is proposed, comprising the blades as described above.

[0130] The embodiments of the present application provide a method for preparing a blade web and a mold thereof, a blade and a wind turbine generator set. First, a test web is prepared. After the test web is shortened, it is set at a predetermined position of a first shell to carry out a blade mold test, so that the height of the test web is less than the inner wall distance between the first shell and the second shell after the mold is closed at the predetermined position, thereby avoiding the mold lifting phenomenon during the mold closing process and preventing the problem of being unable to close the mold. At the same time, the test web is tested for mold closing using the adhesive layer of the second shell to ensure that the bonding between the test web and the first shell and the second shell meets the specification requirements. After obtaining a test web that meets the requirements, a blade web mold is prepared. Finally, a blade web suitable for the predetermined position is obtained according to the mold, so that the blade web is easier to meet the bonding requirements and the overall production quality of the blade is improved.

[0131] 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 are no structural conflicts. 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 method for preparing a mold (10) for a blade web, wherein the blade web is used to connect between a first shell (1) and a second shell (2) at a predetermined position of a blade, the method comprising: Providing a test web (3); Arranging the test web (3) at the predetermined position of the first shell (1); An adhesive layer (4) is provided at the predetermined position of the second shell (2), and the first shell (1) and the second shell (2) are molded together, wherein the height of the test web (3) is smaller than the inner wall distance between the first shell (1) and the second shell (2) after the molds are closed at the predetermined position; Obtaining a gap value between the test web (3) and the adhesive layer (4); When the gap value exceeds a threshold range, the test web (3) is adjusted until the test web (3) abuts against the adhesive layer (4); The test web (3) is taken out, and a mold (10) of the blade web of equal size is manufactured according to the size of the test web (3).

2. The preparation method according to claim 1, characterized in that: The step of providing a test web (3) comprises: Acquiring the inner wall distance between the first shell (1) and the second shell (2) at the predetermined position; Reducing the inner wall distance by a predetermined dimension to obtain a height value of the test web (3); Making a mold of the test web (3) according to the height value of the test web (3); The test web (3) is formed using the mold of the test web (3).

3. The preparation method according to claim 2, characterized in that: The step of obtaining the inner wall distance between the first shell (1) and the second shell (2) at the predetermined position comprises: Simulating a three-dimensional model of the test web (3) at the predetermined position according to the actual structure of the first shell (1) and the second shell (2); The inner wall distance between the first shell (1) and the second shell (2) is obtained according to the three-dimensional model of the test web (3).

4. The preparation method according to claim 2, characterized in that: The step of reducing the inner wall distance by a predetermined size comprises: The inner wall distance between the first shell (1) and the second shell (2) is reduced by 10 mm to 30 mm in the direction toward each other.

5. The preparation method according to claim 1, characterized in that: The step of arranging the test web (3) at the predetermined position of the first shell (1) comprises: A plurality of positioning blocks are arranged in the first housing (1), and the predetermined position is defined by the plurality of positioning blocks; The test web (3) is hoisted to the predetermined position by means of a pressing tool and the test web (3) is pressed downwards so that the test web (3) is bonded to the first shell (1), and the pressing tool is capable of acquiring information of the predetermined position.

6. The preparation method according to claim 1, characterized in that: The step of arranging the test web (3) at the predetermined position of the first shell (1) further comprises: after the test web (3) is arranged at the predetermined position, arranging a plurality of fixing parts between the test web (3) and the first shell (1) to fix the test web (3).

7. The preparation method according to claim 1, characterized in that: The adhesive layer (4) comprises a first adhesive layer and a second adhesive layer which are stacked, and the adhesive layer (4) is arranged at the predetermined position of the second shell (2). The step of molding the first shell (1) and the second shell (2) comprises: Providing a first adhesive layer at the predetermined position of the second shell (2), moulding the second shell (2) and the first shell (1), and measuring the distance between the test web (3) and the first adhesive layer; When the distance between the test web (3) and the first adhesive layer reaches a threshold range, the second shell (2) and the first shell (1) are opened, and a second adhesive layer is stacked at the first adhesive layer; The second shell (2) and the first shell (1) are molded together again so that the test web (3) abuts against the second adhesive layer.

8. The preparation method according to claim 7, characterized in that: The step of measuring the distance between the test web (3) and the first adhesive layer comprises: when the distance is zero, lowering the height of the test web (3) until the distance reaches the threshold range.

9. The preparation method according to claim 1, characterized in that: The step of making a mold (10) of the blade web of equal size according to the size of the test web (3) comprises: Obtaining a support plate (11) having the same height as the test web (3); Two flange plates (12) are connected to both sides of the support plate (11) in its own height direction according to the flange angle of the test web (3) to obtain a mold (10) of the blade web with the same size as the test web (3).

10. The preparation method according to claim 9, characterized in that: The step of manufacturing the mold (10) of the blade web of equal size according to the size of the test web (3) further comprises: arranging a support member (13) between the support plate (11) and the flange plate (12), wherein the support member (13) is capable of supporting the flange plate (12) on the support plate (11).

11. A method for preparing a blade web, characterized in that: include: Obtain a blade web mold according to the preparation method according to any one of claims 1 to 10; The blade web is injection molded in a mold of the blade web.

12. A blade, characterized in that: The invention comprises a first shell, a second shell and a blade web as claimed in claim 11, wherein the blade web is connected between the first shell and the second shell after mold closing.

13. A wind turbine generator set, characterized in that: Comprising the blade of claim 12.

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