Wind turbine blade mounting method and wind turbine blade

Abstract

The embodiment of the present application provides a wind power blade installation method and a wind power blade, and the installation method comprises the following steps: forming a first face shell, a second face shell and a manhole baffle in a mold; demolding the manhole baffle after cooling in a third mold, cutting the manhole baffle into a main baffle and at least one auxiliary baffle; opening the first mold, retaining a part of the first face shell, and connecting the part of the main baffle which is not cut to the first face shell; opening the second mold, splicing the part of the second mold which retains the second face shell with the part of the first mold which retains the first face shell, contacting the first face shell with the second face shell, and connecting the first face shell with the second face shell; connecting the auxiliary baffle to the second face shell; and connecting the main baffle with the auxiliary baffle. The wind power blade installation method and the wind power blade provided by the embodiment of the present application aim to improve the structural reliability of the wind power blade after forming.

Description

Technical Field

[0001] This application belongs to the field of wind turbine blade technology, specifically relating to a wind turbine blade installation method and a wind turbine blade. Background Technology

[0002] Wind turbine blades are the core components of wind turbines that convert natural wind energy into electrical energy, and they are also the main basis for measuring the design and technical level of wind turbines.

[0003] In recent years, with the increasing size of wind turbine blades, their root pitch circle has also become larger. Since wind turbine blades are mainly made of fiberglass, they are subject to heating and cooling during the secondary mold-closing process in the forming stage, making them prone to deformation, especially at the root pitch circle. In the traditional wind turbine blade manufacturing process, the root baffle (manhole baffle) is usually installed after the main structure of the wind turbine blade (suction surface shell and pressure surface shell) has been molded. Therefore, for large blades, this manufacturing process not only increases the difficulty of installing the manhole baffle, but also makes the root pitch circle prone to deformation due to thermal expansion and contraction during the molding of the main structure of the wind turbine blade, resulting in a decrease in the structural reliability of the wind turbine blade. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a wind turbine blade installation method and a wind turbine blade that can improve the structural reliability of wind turbine blades.

[0005] In a first aspect, embodiments of this application provide a wind turbine blade installation method for connecting the suction shell, pressure shell, and manhole baffle of a wind turbine blade, comprising the following steps:

[0006] Step S1: Form the first shell in the first mold, form the second shell in the second mold, and form the manhole baffle in the third mold. The first shell is one of the suction shell and the pressure shell, and the second shell is the other of the suction shell and the pressure shell.

[0007] Step S2: Place the first shell in the first mold to cool and hold, place the second shell in the second mold to cool and hold, demold the manhole baffle after cooling from the third mold, and cut the manhole baffle into a main baffle and at least one secondary baffle.

[0008] Step S3: Open the first mold, retaining the part that holds the first shell, and connect the uncut part of the main baffle to the first shell;

[0009] Step S4: Open the second mold and assemble the part of the second mold that holds the second shell with the part of the first mold that holds the first shell, so that the first shell and the second shell come into contact and connect the first shell and the second shell;

[0010] Step S5: Connect the secondary baffle to the second shell;

[0011] Step S6: Connect the main baffle and the auxiliary baffle.

[0012] According to an embodiment of the first aspect of this application, after connecting the main baffle and the sub-baffle, the following steps are further included:

[0013] The connection between the main baffle and the auxiliary baffle is reinforced using reinforcing components.

[0014] According to one embodiment of the first aspect of this application, the reinforcing member is a biaxial fabric and is disposed at both ends of the manhole baffle in the thickness direction.

[0015] According to an embodiment of the first aspect of this application, the reinforcing member includes a first fabric body and a second fabric body, the first fabric body being close to the manhole baffle and the second fabric body being away from the manhole baffle;

[0016] The orthographic projection of the first fabric body onto the manhole baffle falls within the orthographic projection of the second fabric body onto the manhole baffle.

[0017] According to an embodiment of the first aspect of this application, the reinforcing member further includes a plurality of third fabric bodies, which are sequentially disposed between the first fabric body and the second fabric body along the direction from the first fabric body to the second fabric body;

[0018] Along the direction from the first fabric body to the second fabric body, the projected area of ​​multiple third fabric bodies onto the manhole baffle gradually increases.

[0019] According to an embodiment of the first aspect of this application, cutting a manhole baffle into a main baffle and at least one secondary baffle includes the following steps:

[0020] A preset size is cut inward from the edge of the manhole baffle along the first cutting line, wherein the first cutting line coincides with any diameter of the manhole baffle;

[0021] Bend it 90° and cut it to the edge of the manhole cover. The cut part is a secondary cover, and the remaining part is the main cover.

[0022] The ratio between the preset dimension value W and the diameter L of the manhole baffle is 1 / 4≦W / L≦1 / 3; and the preset dimension value is 0.5m≦W≦1.0m.

[0023] According to one embodiment of the first aspect of this application, there are two auxiliary baffles, which are symmetrically arranged along the diameter of the manhole baffle perpendicular to the first cutting line.

[0024] According to one embodiment of the first aspect of this application, connecting the main baffle to the first faceplate includes the following sub-steps:

[0025] Multiple limiting blocks are provided inside the first shell. Two limiting blocks are arranged in pairs along the stretching direction of the first shell, and multiple pairs of limiting blocks are equidistant along the chord direction of the first shell.

[0026] The main baffle is hoisted between each pair of limit blocks to provide initial positioning for the main baffle using multiple limit blocks;

[0027] Use the first tooling to fix the end of the main baffle away from the limit block;

[0028] The second tooling is used to adjust the spanwise distance of the main baffle between each pair of limit blocks so that the main baffle is perpendicular to the spanwise direction.

[0029] The main baffle and the first shell are fixed together by applying glue.

[0030] According to an embodiment of the first aspect of this application, the spanwise spacing between each group of limiting blocks is D, then: d+1≦D≦d+3, where d is the thickness of the manhole baffle.

[0031] Secondly, embodiments of this application also provide a wind turbine blade, which is installed and shaped using the wind turbine blade installation method of any embodiment of the first aspect of this application.

[0032] The beneficial effects of this application are that by cutting the manhole baffle into a main baffle and at least one auxiliary baffle, the installation process of the manhole baffle is divided into multiple installation processes, thereby reducing the installation difficulty of the manhole baffle in large wind turbine blades, reducing the possibility of deformation of the manhole baffle during hoisting, transportation and installation, and improving the structural reliability of the manhole baffle; by advancing the installation process of the manhole baffle to before the connection between the first shell and the second shell, the manhole baffle can be used to provide support for the blade root pitch circle of the first shell and the second shell, improving the phenomenon of deformation of the blade root pitch circle after heating, thereby further improving the structural reliability of the wind turbine blade. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a flowchart of the wind turbine blade installation method provided in the first aspect of this application;

[0035] Figure 2 This is a flowchart of a sub-step of step S2 in the wind turbine blade installation method provided in the first aspect embodiment of this application;

[0036] Figure 3 This is a flowchart of a sub-step of step S3 in the wind turbine blade installation method provided in the first aspect embodiment of this application;

[0037] Figure 4 This is a schematic diagram of the cutting structure of the manhole baffle in the wind turbine blade installation method provided in the first aspect embodiment of this application;

[0038] Figure 5 This is a schematic diagram of the cooperation structure between the reinforcing member and the manhole baffle in the wind turbine blade installation method provided in the first aspect embodiment of this application;

[0039] Figure 6 This is a front view of the assembly structure of each component in step S3 of the wind turbine blade installation method provided in the first aspect embodiment of this application;

[0040] Figure 7 yes Figure 6 A top view of the assembly structure of each component in the wind turbine blade installation method shown;

[0041] Figure 8 This is a view of a wind turbine blade installed using the wind turbine blade installation method provided in the first aspect of this application, viewed from the blade root towards the blade tip.

[0042] In the figure, 10 is the first shell; 20 is the second shell; 30 is the manhole baffle; 31 is the main baffle; 32 is the secondary baffle; 40 is the reinforcing member; 41 is the first fabric body; 42 is the second fabric body; 43 is the third fabric body; 50 is the limiting block; 60 is the first tooling; 70 is the second tooling; and 101 is the first cutting line. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0045] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0048] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0049] Figure 1 This is a flowchart of the wind turbine blade installation method provided in the first aspect of this application; Figure 2 This is a flowchart of a sub-step of step S2 in the wind turbine blade installation method provided in the first aspect embodiment of this application; Figure 3 This is a flowchart of a sub-step of step S3 in the wind turbine blade installation method provided in the first aspect embodiment of this application; Figure 4This is a schematic diagram of the cutting structure of the manhole baffle in the wind turbine blade installation method provided in the first aspect embodiment of this application; Figure 5 This is a schematic diagram of the cooperation structure between the reinforcing member and the manhole baffle in the wind turbine blade installation method provided in the first aspect embodiment of this application; Figure 6 This is a front view of the assembly structure of each component in step S3 of the wind turbine blade installation method provided in the first aspect embodiment of this application; Figure 7 yes Figure 6 A top view of the assembly structure of each component in the wind turbine blade installation method shown;

[0050] Figure 8 This is a view of a wind turbine blade installed using the wind turbine blade installation method provided in the first aspect of this application, viewed from the blade root towards the blade tip.

[0051] like Figures 1 to 8 As shown in the figure, this application provides a wind turbine blade installation method for connecting the suction shell (SS shell), pressure shell (PS shell), and manhole baffle 30 of the wind turbine blade, including the following steps:

[0052] Step S1: Form the first shell 10 in the first mold, form the second shell 20 in the second mold, and form the manhole baffle 30 in the third mold. The first shell 10 is one of the suction shell and the pressure shell, and the second shell 20 is the other of the suction shell and the pressure shell.

[0053] This step is the forming step of each component of the wind turbine blade, that is, the three components that make up the outer shell structure of the wind turbine blade: the first shell 10, the second shell 20 and the manhole baffle 30 are formed in the first mold, the second mold and the third mold respectively. Among them, the first shell 10 and the second shell 20 together form the main body shape of the outer shell of the wind turbine blade, that is, the first shell 10 and the second shell 20 together form the main structure of the wind turbine blade.

[0054] In these embodiments of this application, the first shell 10 and the second shell 20 are respectively a suction shell and a pressure shell, that is, the first shell 10 is one of a suction shell and a pressure shell, and the second shell 20 is the other of a suction shell and a pressure shell. Exemplarily, in some embodiments, the first shell 10 can be set as a suction shell, in which case the corresponding first mold is a mold for forming the suction shell, and correspondingly, the second shell 20 is a pressure shell, and the corresponding second mold is a mold for forming the pressure shell; alternatively, the first shell 10 can be set as a pressure shell, in which case the corresponding first mold is a mold for forming the pressure shell, and the second shell 20 is a suction shell, in which case the corresponding second mold is a mold for forming the suction shell.

[0055] In these embodiments of the present application, the wind turbine blade is a hollow structure. The first shell 10 and the second shell 20 can be shell structures with a certain degree of concavity. During the installation of the first shell 10 and the second shell 20, the peripheries of the first shell 10 and the second shell 20 can be aligned and glued together to form a hollow wind turbine blade with a accommodating space.

[0056] It is understandable that, in order to further improve the structural strength of wind turbine blades, beam structures or reinforcing rib structures can be set in the aforementioned space for wind turbine blades during subsequent installation, so as to improve the structural strength of wind turbine blades when their size is large.

[0057] The manhole baffle 30 is located at the root of the main structure formed by the first shell 10 and the second shell 20. It is a baffle that works with the first shell 10 and the second shell 20 to seal the aforementioned accommodating space. At the same time, when the wind turbine blades malfunction and need repair, maintenance personnel can enter the aforementioned accommodating space through the manhole on the manhole baffle 30 to conduct a comprehensive and detailed inspection and repair of the wind turbine blades from the inside.

[0058] Step S2: Place the first shell 10 in the first mold to cool and hold, place the second shell 20 in the second mold to cool and hold, demold the manhole baffle 30 after cooling from the third mold, and cut the manhole baffle 30 into a main baffle 31 and at least one secondary baffle 32.

[0059] In this step, demolding the manhole baffle 30 after it has cooled in the third mold refers to demolding the manhole baffle 30 after it has cooled in the third mold. In some embodiments, the external environment of the third mold can be artificially altered (e.g., spraying a cooling medium onto the third mold) to increase the cooling and forming speed of the manhole baffle 30 within the third mold, thereby improving the production efficiency of the wind turbine blades.

[0060] Cutting the manhole baffle 30 into a main baffle 31 and at least one secondary baffle 32 means that after the manhole baffle 30 has cooled, formed and demolded, the operator can use a cutting machine or CNC machine tool or other cutting components to cut the manhole baffle 30 to remove at least a part of the structure of the manhole baffle 30. In this way, the removed part is used as the secondary baffle 32 of the manhole baffle 30, and the remaining structure is used as the main baffle 31 of the manhole baffle 30.

[0061] It should be noted that in these embodiments of this application, the main baffle 31 is the main structure of the manhole baffle 30. When cutting the manhole baffle 30, the passage for people to pass through can be retained in the main baffle 31 part of the manhole baffle 30. During the operation of the wind turbine blade, the force on the manhole baffle 30 mainly comes from the radial tension or pressure applied by the first shell 10 or the second shell 20, and there is basically no force along the length of the wind turbine blade. Therefore, in these embodiments of this application, the process of cutting, installing, and reconnecting the manhole baffle 30 will not have too much impact on the stress structure of the manhole baffle 30, thus ensuring the strength of the stress structure of the manhole baffle 30.

[0062] In these embodiments of this application, the manhole baffle 30 is cut into a structure consisting of a main baffle 31 and at least one secondary baffle 32, so that the originally large manhole baffle 30 is divided into at least two parts. This reduces the difficulty of installing the manhole baffle 30 on the first shell 10 or the second shell 20, making it possible to install part of the structure of the manhole baffle 30 (main baffle 31) onto the first shell 10 or the second shell 20 before the first shell 10 and the second shell 20 are molded together. This allows the aforementioned part of the structure of the manhole baffle 30 to provide support when the first shell 10 and the second shell 20 are molded together, reducing the probability of deformation of the first shell 10 and the second shell 20 due to heat during the mold-fitting process. This makes the structure of the first shell 10 and the second shell 20 more complete after connection, and the reliability of the molded structure is better.

[0063] Step S3: Open the first mold, retaining the portion containing the first shell 10, and connect the uncut portion of the main baffle 31 to the first shell 10.

[0064] The first mold is opened, and the part containing the first shell 10 is retained. In these embodiments of the present application, the material of the wind turbine blade can be set as fiberglass. Fiberglass is a reinforced plastic made by infiltrating glass fibers or carbon fibers of different lengths into plastics such as epoxy resin and unsaturated resin. It has the advantages of high strength, light weight and aging resistance, which is conducive to the large-scale wind turbine blade, so that the wind turbine blade has sufficient rigidity and can obtain a larger wind-catching area.

[0065] In this way, the portion of the mold used to form the inner surface of the first shell 10 can be removed, allowing the portion of the first mold used to form the outer surface of the first shell 10 to hold the first shell 10 in place. The inner surface refers to the surface near the receiving space after the first shell 10 is connected to the second shell 20. The purpose of this is to hold the first shell 10 partially within the first mold. In the subsequent installation process of the manhole baffle 30, the positioning fixture for the manhole baffle 30 can be installed using the first mold, simplifying the installation difficulty of the positioning fixture. Simultaneously, the first mold can be used to limit the movement of the first shell 10, reducing the probability of deformation during subsequent connection with the second shell 20 and minimizing deformation, thereby improving the reliability of the wind turbine blade manufacturing process.

[0066] Connecting the uncut portion of the main baffle 31 to the first shell 10 means that after the manhole baffle 30 is cut into the main baffle 31 and the auxiliary baffle 32, there will be a gap on the main baffle 31 corresponding to the position of the auxiliary baffle 32. In this step, it is necessary to control that the gap does not contact the first shell 10 in order to increase the contact area between the main baffle 31 and the first shell 10 and strengthen the connection strength between the main baffle 31 and the first shell 10. At the same time, setting the cut portions of the main baffle 31 and the auxiliary baffle 32 away from the first shell 10 allows the auxiliary baffle 32 to be accurately positioned by setting a limiting block on the second shell 20 after the second shell 20 is connected to the first shell 10, thereby improving the connection accuracy between the main baffle 31 and the auxiliary baffle 32 and further improving the structural reliability of the wind turbine blade after molding.

[0067] In these embodiments of the present application, the main baffle 31 is connected to the first shell 10, and the connection method between the two can be, but is not limited to, welding or bonding with structural adhesive.

[0068] Step S4: Open the second mold and assemble the part of the second mold that holds the second shell 20 with the part of the first mold that holds the first shell 10, so that the first shell 10 and the second shell 20 come into contact and connect the first shell 10 and the second shell 20.

[0069] This step is the connection step between the first shell 10 and the second shell 20. In this step, the part of the second mold that holds the second shell 20 is combined with the part of the first mold that holds the first shell 10. A possible implementation is that after positioning the second shell 20 and the part of the second mold that holds the second shell 20, the second mold and the second shell 20 are hoisted and flipped as a whole and connected to the first mold, so that the first shell 10 and the second shell 20 come into contact.

[0070] In these embodiments of this application, the contact between the first shell 10 and the second shell 20 means that the tip of the first shell 10 contacts the tip of the second shell 20, and the root of the first shell 10 contacts the root of the second shell 20, so that the peripheral shapes of the first shell 10 and the second shell 20 fit together to form a cavity structure with a accommodating space.

[0071] The first shell 10 is connected to the second shell 20. In a possible implementation, the first shell 10 and the second shell 20 are fixedly connected by adhesive. In these embodiments of the present application, at least two of epoxy resin adhesive, polyimide adhesive, acrylic adhesive or fluororubber adhesive can be used between the first shell 10 and the second shell 20 to improve the bonding strength between the first shell 10 and the second shell 20 and improve the structural stability of the wind turbine blade.

[0072] Step S5: Connect the secondary baffle 32 to the second shell 20.

[0073] In this step, the second shell 20 is connected to the first shell 10, and at the leaf root of both, the main baffle 31 covers part of the leaf root through hole, leaving some space (the part of the secondary baffle 32 in the manhole baffle 30 that is cut off).

[0074] In this step, several limiting blocks can be placed on the second shell 20 at positions corresponding to the main baffle 31 to provide a limiting effect for the installation of the secondary baffle 32. In these embodiments of this application, since the area and weight of the secondary baffle 32 are smaller than those of the main baffle 31, in some embodiments, the secondary baffle 32 can be directly installed to the second shell 20 manually and then glued to the second shell 20; in other embodiments, positioning fixtures can be used to assist in the installation of the secondary baffle 32 to further improve the installation accuracy of the secondary baffle 32.

[0075] Step S6: Connect the main baffle 31 to the auxiliary baffle 32.

[0076] This step is the repair process of the manhole baffle 30. In step S5, the auxiliary baffle 32 is installed to the second shell 20. Due to the assembly tolerance, there may be a gap between the auxiliary baffle 32 and the main baffle 31. At this time, the auxiliary baffle 32 and the main baffle 31 can be repaired into a whole by applying glue at the connection (cutting point) between the main baffle 31 and the auxiliary baffle 32.

[0077] In these embodiments of this application, by cutting the manhole baffle 30 into a main baffle 31 and at least one secondary baffle 32 in step S2, the structure of the manhole baffle 30 is divided into at least two parts (a main baffle 31 and a secondary baffle 32), thereby reducing the difficulty of handling the manhole baffle 30 and reducing the possibility of deformation of the manhole baffle 30 during transportation or installation. With the trend of wind turbine blades becoming larger, such processing and installation technology can be adapted to the larger size of wind turbine blades, improving the structural stability and reliability of the larger wind turbine blades after installation.

[0078] By cutting the manhole baffle 30 into a main baffle 31 and at least one auxiliary baffle 32, the installation process of the manhole baffle 30 is divided into multiple installation steps, thereby reducing the installation difficulty of the manhole baffle 30 in large wind turbine blades, reducing the possibility of deformation of the manhole baffle 30 during hoisting, transportation and installation, and improving the structural reliability of the manhole baffle 30. By advancing the installation process of the manhole baffle 30 to before the connection between the first shell 10 and the second shell 20, the manhole baffle 30 can be used to provide support for the blade root pitch circle of the first shell 10 and the second shell 20, improving the phenomenon of deformation of the blade root pitch circle after heating, and further improving the structural reliability of the wind turbine blade.

[0079] For example, this application also provides a set of comparative examples to demonstrate the effect of the wind turbine blade installation method provided in this application. In this set of comparative examples, the installation method provided in the foregoing embodiments of this application is used for blade type A (4600mm pitch circle), and the post-processing installation method of connecting the first shell 10 and the second shell 20 and then installing the manhole baffle 30 in the related art is used for blade type B (2800mm pitch circle). The maximum deformation, minimum deformation, and average deformation at the pitch circle of blade type A and blade type B after installation are measured and calculated respectively, and the results are shown in the table below:

[0080]

[0081]

[0082] Therefore, in this comparative example, although the pitch circle size of blade A is larger than that of blade B, by using the wind turbine blade installation method provided in this application to install the wind turbine blade of blade A, the average deformation at the pitch circle of blade A, which originally deformed more due to its larger pitch circle size, is less than that of blade B, which has a smaller pitch circle size.

[0083] According to an embodiment of the first aspect of this application, after connecting the main baffle 31 and the secondary baffle 32, the following steps are further included:

[0084] Step S7: Use the reinforcing member 40 to reinforce the connection between the main baffle 31 and the auxiliary baffle 32.

[0085] In these embodiments of this application, since the manhole baffle 30 is cut and then restored, there may still be structural weak points at the connection between the main baffle 31 and the auxiliary baffle 32. At the same time, since the manhole baffle 30 is located at the root of the wind turbine blade, and the root of the blade is the area with the greatest stress on the wind turbine blade, it is used to connect the wind turbine blade and the hub to transfer the load of the wind turbine blade to the critical position of the unit.

[0086] Based on this, after connecting the main baffle 31 and the auxiliary baffle 32 in step S6, a reinforcement step in step S7 can be set to further enhance the structural strength of the connection between the main baffle 31 and the auxiliary baffle 32.

[0087] According to one embodiment of the first aspect of this application, the reinforcing member 40 is a biaxial fabric and is disposed at both ends of the manhole baffle 30 in the thickness direction.

[0088] Biaxial fabric, also known as glass fiber biaxial fabric, is used as a reinforcing member 40 in these embodiments of the present application and is disposed at both ends of the manhole baffle 30 in the thickness direction. Since the material is similar to that of the manhole baffle 30, it has good connection performance and can effectively improve the structural consistency between the main baffle 31 and the secondary baffle 32, and reduce the impact of cutting on the structural consistency of the manhole baffle 30.

[0089] The reinforcing member 40 is disposed at both ends of the manhole baffle 30 in the thickness direction, so that the manhole baffle 30 can be reinforced at both ends of the manhole baffle 30 in the thickness direction at the same time, thus improving reliability.

[0090] According to an embodiment of the first aspect of this application, the reinforcing member 40 includes a first fabric body 41 and a second fabric body 42, the first fabric body 41 being close to the manhole baffle 30 and the second fabric body 42 being away from the manhole baffle 30; the orthographic projection of the first fabric body 41 onto the manhole baffle 30 falls within the orthographic projection of the second fabric body 42 onto the manhole baffle 30.

[0091] In these embodiments of this application, the first fabric 41 and the second fabric 42 are made of the same material and can both be set as biaxial fabric. The difference between the first fabric 41 and the second fabric 42 lies in their coverage area. The orthographic projection of the first fabric 41 onto the manhole baffle 30 falls within the orthographic projection of the second fabric 42 onto the manhole baffle 30, meaning that the area of ​​the first fabric 41 is smaller than the area of ​​the second fabric 42, and after the reinforcing member 40 is installed, the second fabric 42 covers the first fabric 41.

[0092] For example, in these embodiments of this application, the first fabric 41 and the second fabric 42 can both be set as strip structures to be attached along the cutting lines of the main baffle 31 and the secondary baffle 32 to reinforce the structural consistency of the main baffle 31 and the secondary baffle 32.

[0093] It should be noted that in these embodiments of this application, a third, fourth, fifth, etc. fabric body can also be provided. The first fabric body 41 is close to the manhole baffle 30, and the second fabric body 42 is far away from the manhole baffle 30. This means that the first fabric body 41 is the part of the reinforcing member 40 that is closest to the manhole baffle 30, and the second fabric body 42 is the part of the reinforcing member 40 that is far away from the manhole baffle 30.

[0094] Based on this, in these embodiments of the present application, the first fabric 41 and the second fabric 42 are both reinforcing components that can directly connect the main baffle 31 and the secondary baffle 32. The structural consistency between the main baffle 31 and the secondary baffle 32 can be improved at least through the first fabric 41 and the second fabric 42.

[0095] According to an embodiment of the first aspect of this application, the reinforcing member 40 further includes a plurality of third fabric bodies 43, which are sequentially disposed between the first fabric body 41 and the second fabric body 42 along the direction from the first fabric body 41 to the second fabric body 42.

[0096] Along the direction from the first fabric body 41 to the second fabric body 42, the projected area of ​​the multiple third fabric bodies 43 onto the manhole baffle 30 gradually increases.

[0097] The function of the multiple third fabric elements 43 is to further enhance the structural consistency between the main baffle 31 and the secondary baffle 32. Furthermore, in these embodiments of this application, the projected area of ​​the multiple third fabric elements 43 onto the manhole baffle 30 gradually increases along the direction from the first fabric element 41 to the second fabric element 42. That is, each layer of third fabric elements 43 can cover the previous layer and directly connect to the main baffle 31 and the secondary baffle 32, thereby further improving the structural consistency between the main baffle 31 and the secondary baffle 32, and thus making the structural reliability of the wind turbine blade better.

[0098] Exemplary examples in these embodiments of this application show that the first fabric body 41, the second fabric body 42, and the third fabric body 43 are all elongated strips, with two third fabric bodies 43. Thus, the structure of the reinforcing member 40 can be such that the first fabric body 41 is disposed at the connection between the main baffle 31 and the secondary baffle 32, directly acting on the main baffle 31 and the secondary baffle 32 to improve the structural consistency between the main baffle 31 and the secondary baffle 32; the smaller third fabric body 43 covers the side of the first fabric body 41 facing away from the manhole baffle 30, and this third fabric body... 43 acts directly on the main baffle 31 and the secondary baffle 32; another third fabric 43 with a larger area covers the aforementioned smaller third fabric 43, and this larger third fabric 43 also acts directly on the main baffle 31 and the secondary baffle 32; finally, a second fabric 42 covers the aforementioned larger third fabric 43, and this second fabric 42 also acts directly on the main baffle 31 and the secondary baffle 32, ultimately forming a structure in which the first fabric 41, the two third fabrics 43, and the second fabric 42 jointly connect the main baffle 31 and the secondary baffle 32. Simultaneously, on the other side of the manhole baffle 30 in the thickness direction, the same structure of the aforementioned reinforcing member 40 is also provided, which will not be described in detail here.

[0099] According to an embodiment of the first aspect of this application, cutting the manhole baffle 30 into a main baffle 31 and at least one secondary baffle 32 includes the following steps:

[0100] Step S21: Cut a preset size inward from the edge of the manhole baffle 30 along the first cutting line 101, wherein the first cutting line 101 coincides with any diameter of the manhole baffle 30;

[0101] Step S22: Bend 90° and cut to the edge of the manhole baffle 30. The cut part is a secondary baffle 32, and the remaining part is the main baffle 31.

[0102] The ratio between the preset dimension value W and the diameter L of the manhole baffle is 1 / 4≦W / L≦1 / 3; and the preset dimension value is 0.5m≦W≦1.0m.

[0103] In these embodiments of this application, the manhole baffle 30 cutting process of step S2 is further refined into sub-steps of steps S21 and S22.

[0104] In step S21, the manhole baffle 30 is cut inward from the edge of the manhole baffle 30 along the first cutting line 101. This is intended to increase the area of ​​the auxiliary baffle 32 as much as possible, thereby reducing the area of ​​the main baffle 31, which facilitates the subsequent hoisting, transportation and installation of the main baffle 31.

[0105] Meanwhile, after cutting the preset size along the first cutting line 101, in step S22, the manhole baffle 30 is bent at 90° and cut to the edge, so that the cutting angle between the main baffle 31 and the auxiliary baffle 32 in the manhole baffle 30 is right angle, which is beneficial for the subsequent splicing of the main baffle 31 and the auxiliary baffle 32.

[0106] The ratio between the preset size value W and the diameter L of the manhole baffle is 1 / 4≦W / L≦1 / 3; and the preset size value is 0.5m≦W≦1.0m. The purpose is to control the area of ​​the sub-baffle 32, so that the sub-baffle 32 can be spliced ​​with the main baffle 31 in the subsequent installation process, while minimizing the area of ​​the main baffle 31 so that the main baffle 31 can be installed on the first shell 10.

[0107] According to an embodiment of the first aspect of this application, there are two sub-baffles 32, which are symmetrically arranged along the diameter of the manhole baffle 30 perpendicular to the first cutting line 101.

[0108] In these embodiments of the present application, two secondary baffles 32 are provided. The purpose of this is to balance the area of ​​the main baffle 31 and the area of ​​the secondary baffle 32, so that the main baffle 31 can be installed onto the first shell 10 more easily, while the area of ​​the secondary baffle 32 is not too large, so that the secondary baffle 32 can also be installed onto the second shell 20 more easily.

[0109] At the same time, the number of secondary baffles 32 should not be excessive to reduce the possibility that the manhole baffle 30 may be affected by cutting it into too many panels, thus compromising the structural consistency of the manhole baffle 30. For example, in these embodiments of this application, the number of secondary baffles 32 may be three or four.

[0110] According to an embodiment of the first aspect of this application, step S3, connecting the main baffle 31 to the first shell 10, includes the following sub-steps:

[0111] Step S31: Multiple limiting blocks 50 are set inside the first shell 10. Two limiting blocks 50 are set in pairs along the stretching direction of the first shell 10, and multiple pairs of limiting blocks 50 are set at equal intervals along the chord direction of the first shell 10.

[0112] Step S32: The main baffle 31 is hoisted between each pair of limit blocks 50 to provide initial positioning for the main baffle 31 using multiple limit blocks 50.

[0113] Step S33: Use the first tooling 60 to fix the end of the main baffle 31 away from the limit block 50;

[0114] Step S34: Use the second tooling 70 to adjust the spanwise distance of the main baffle 31 between each pair of limit blocks 50 so that the main baffle 31 is perpendicular to the spanwise direction.

[0115] Step S35: Apply glue to fix the main baffle 31 and the first shell 10.

[0116] In these embodiments of this application, the limiting block 50 includes, but is not limited to, items that can limit the position, such as adhesive angles or wooden blocks. The first tooling 60 can be a rigid clip-type fixing device to be installed on the first mold and to fix the main baffle 31. In some embodiments, the first tooling 60 can also be a manual positioning tool such as a strap or rope.

[0117] In step S31, setting multiple limiting blocks 50 inside the first shell 10 means setting multiple limiting blocks 50 on the surface of the first shell 10 that is used to form an accommodating space with the second shell 20. In these embodiments of the present application, the limiting blocks 50 can be fixedly connected to the first shell 10 by adhesive.

[0118] The two limiting blocks 50 are arranged in pairs along the span of the first shell 10. This means that in these embodiments of the present application, the multiple limiting blocks 50 are divided into multiple groups, and each group of limiting blocks 50 includes two limiting blocks 50 arranged opposite each other along the span of the first shell 10. During the installation of the main baffle 31, different parts of the main baffle 31 can be placed between the groups of limiting blocks 50 to provide initial positioning of the main baffle 31 using multiple groups of limiting blocks 50.

[0119] It is understood that in these embodiments of this application, the spacing between each set of limiting blocks 50 is equal and should be greater than or equal to the thickness of the main baffle 31.

[0120] In step S32, the main baffle 31 is suspended between each set of limiting blocks 50 so that the multiple limiting blocks 50 provide initial positioning for the main baffle 31. Since each set of limiting blocks 50 is equidistant along the chord direction of the first shell 10, when the main baffle 31 is placed between each set of limiting blocks 50, its approximate orientation can be restricted to be perpendicular to the span direction of the first shell 10.

[0121] In these embodiments of the present application, a truss can be used to hoist the main baffle 31, and when the main baffle 31 is installed, the second shell 20 is not connected to the first shell 10, so that the space above the first shell 10 is not blocked, and the main baffle 31 can be easily hoisted to the first shell 10.

[0122] In step S33, the first tooling 60 is used to fix the end of the main baffle 31 away from the limiting block 50. That is, the first tooling 60 is used in conjunction with the first shell 10 to restrict the degree of freedom of the main baffle 31 in the chord direction of the first shell 10, and the limiting blocks 50 are used to restrict the degree of freedom of the main baffle 31 in the spanwise direction of the first shell 10. Thus, the coarse positioning of the main baffle 31 is completed.

[0123] Step S34 is the fine positioning step for the main baffle 31. Its purpose is to use the second tooling 70 to adjust the spanwise distance of the main baffle 31 between each pair of limit blocks 50 so that the main baffle 31 is perpendicular to the spanwise direction. This helps to enhance the stability and reliability of the connection between the main baffle 31 and the first shell 10, and also facilitates the subsequent positioning and installation of the secondary baffle 32.

[0124] Step S35 is the fixing step of the main baffle 31. In this step, it should be noted that in each set of limiting blocks 50, the distance between two limiting blocks 50 along the longitudinal direction may be greater than the thickness of the main baffle 31. When installing the limiting blocks 50 in this step, in addition to applying glue between the main baffle 31 and the first shell 10, glue can also be applied in the gap between the limiting blocks 50 and the main baffle 31 to further strengthen the connection strength between the main baffle 31 and the first shell 10.

[0125] It should be noted that in these embodiments of this application, in the subsequent installation process of the sub-baffle 32, the aforementioned limiting block 50 can also be provided on the surface of the second shell 20 near the receiving space. In this case, multiple limiting blocks 50 can also be provided in a group structure, that is, two limiting blocks 50 are arranged in pairs along the span of the first shell 10, and multiple pairs of limiting blocks 50 are equidistant along the chord of the first shell 10, so as to provide positioning for the installation of the sub-baffle 32.

[0126] According to an embodiment of the first aspect of this application, the spanwise distance between each group of limiting blocks 50 is D, then: d+1≦D≦d+3, where d is the thickness of the manhole baffle.

[0127] In these embodiments of the present application, the value of the spanwise distance D between each group of limiting blocks 50 is limited so that the spanwise distance D between each group of limiting blocks 50 is greater than or equal to the thickness of the manhole baffle 30 by 1 to 3 cm, so as to leave enough space for the installation of the main baffle 31, which can reduce the time for the main baffle 31 to be connected to the first shell 10 and effectively improve production efficiency.

[0128] The second aspect of this application also provides a wind turbine blade, which is installed and shaped using the wind turbine blade installation method of any embodiment of the first aspect of this application.

[0129] In these embodiments of the present application, the manhole baffle 30 is a split structure including a main baffle 31 and a secondary baffle 32. At the same time, it can be installed separately to the main structure (first shell 10 and second shell 20) of the wind turbine blade before the main structure is molded. This can alleviate the impact of the heat generated when the main structure of the wind turbine blade is molded on the connection structure of the manhole baffle 30, and the structural reliability is higher.

[0130] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0131] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A method for installing wind turbine blades, used to connect the suction shell, pressure shell, and manhole baffle of a wind turbine blade, characterized in that, Includes the following steps: The first shell is formed in the first mold, the second shell is formed in the second mold, and the manhole baffle is formed in the third mold, wherein the first shell is one of the suction shell and the pressure shell, and the second shell is the other of the suction shell and the pressure shell. The first faceplate is placed in the first mold to cool and hold, the second faceplate is placed in the second mold to cool and hold, the manhole baffle is cooled and demolded from the third mold, and the manhole baffle is cut into a main baffle and at least one secondary baffle. The first mold is opened, and the portion containing the first face shell is retained. The uncut portion of the main baffle is then connected to the first face shell. The second mold is opened, and the part of the second mold that holds the second face shell is joined with the part of the first mold that holds the first face shell, so that the first face shell and the second face shell come into contact and are connected; Connect the sub-baffle to the second face shell; Connect the main baffle to the secondary baffle.

2. The wind turbine blade installation method according to claim 1, characterized in that, After connecting the main baffle and the sub-baffle, the following steps are also included: The connection between the main baffle and the secondary baffle is reinforced using reinforcing components.

3. The wind turbine blade installation method according to claim 2, characterized in that, The reinforcing member is a biaxial fabric and is disposed at both ends of the manhole baffle in the thickness direction.

4. The wind turbine blade installation method according to claim 3, characterized in that, The reinforcing member includes a first fabric body and a second fabric body, wherein the first fabric body is close to the manhole baffle and the second fabric body is away from the manhole baffle; The orthographic projection of the first fabric onto the manhole baffle falls within the orthographic projection of the second fabric onto the manhole baffle.

5. The wind turbine blade installation method according to claim 4, characterized in that, The reinforcing member also includes a plurality of third fabric bodies, which are sequentially disposed between the first fabric body and the second fabric body along the direction from the first fabric body to the second fabric body; Along the direction from the first fabric to the second fabric, the projected area of ​​the plurality of third fabrics onto the manhole baffle gradually increases.

6. The wind turbine blade installation method according to claim 1, characterized in that, The step of cutting the manhole baffle into a main baffle and at least one secondary baffle includes the following steps: A preset size is cut inward from the edge of the manhole baffle along a first cutting line, wherein the first cutting line coincides with any diameter of the manhole baffle; The manhole baffle is bent at 90° and cut to the edge of the manhole baffle. The cut part is a secondary baffle, and the remaining part is the main baffle. The ratio between the preset dimension value W and the diameter L of the manhole baffle is 1 / 4≦W / L≦1 / 3; and the preset dimension value is 0.5m≦W≦1.0m.

7. The wind turbine blade installation method according to claim 6, characterized in that, The number of the auxiliary baffles is two, and the two auxiliary baffles are symmetrically arranged along the diameter of the manhole baffle perpendicular to the first cutting line.

8. The wind turbine blade installation method according to claim 1, characterized in that, Connecting the main baffle to the first faceplate includes the following sub-steps: Multiple limiting blocks are provided inside the first shell. Two limiting blocks are arranged in pairs along the stretching direction of the first shell, and multiple pairs of limiting blocks are equidistant along the chord direction of the first shell. The main baffle is suspended between each pair of limiting blocks to provide initial positioning for the main baffle using the multiple limiting blocks; The first tooling is used to fix the end of the main baffle away from the limiting block; The second tooling is used to adjust the spanwise distance of the main baffle between each pair of the limiting blocks so that the main baffle is perpendicular to the spanwise direction. The main baffle and the first faceplate are fixed together by applying adhesive.

9. The wind turbine blade installation method according to claim 8, characterized in that, If the spanwise distance between each group of limiting blocks is D, then: d+1≦D≦d+3, where d is the thickness of the manhole baffle.

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