Assembly method of wind power blade

Abstract

The invention discloses an assembly method of a wind power blade, which comprises the following steps of: presetting a die assembly gap of a web plate, setting a total die assembly gap H of the web plate in the blade, and manufacturing the web plate; a web is pre-installed, a gap cushion block with the thickness being H / 2 is arranged on the side, facing the web, of the first shell, and the web is arranged on the gap cushion block in a cushioned mode and fixed; the web is fixed, the side, facing the second shell, of the web is coated with bonding glue in a blade coating mode, a mold of the second shell and the web are assembled to bond the second shell and the web, and a bonding area is solidified; the first shell is fixed, the web plate pressing tool is adjusted according to the bonding state of the second shell and the web plate, the relative position of the web plate pressing tool and the web plate is fixed, the gap cushion block is removed, bonding glue is coated, and the bonding glue is pressed and solidified through the web plate pressing tool. The gap between the web plate and the first shell is preset through the gap cushion block, so that only the distance between the web plate and the second shell needs to be controlled when the web plate is fixed, the assembly error of the web plate is reduced, and the overall production quality of the blade is improved.

Description

Technical Field

[0001] The present application relates to the technical field of wind power equipment, and particularly relates to an assembly method for wind turbine blades. Background Art

[0002] Wind turbine blades usually have webs inside to fix with the windward shell and the leeward shell on both sides of the blade from the inside, so as to enhance the structural strength of the blade. However, during the connection process of the web with the two side shells, it is difficult to ensure that the gap between the web and the two side shells is within the set range. If the gap between the web and the shell is too small, there will be a problem of mold assembly interference and difficult smooth assembly. If the gap between the web and the shell is too large, it will cause the structural adhesive to be difficult to completely fill the gap and affect the stability of the curing process. For the above gap control, currently, the gap definition between the web and the two shells completely depends on the on-site tooling debugging by operators, which is not only time-consuming and laborious, but also will produce unpredictable errors due to the differences in operator experience, and seriously affect the blade delivery or even cause wind farm accidents during use.

[0003] Therefore, how to improve the operation convenience and assembly accuracy of wind turbine blades during the assembly process is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide an assembly method for wind turbine blades to improve the operation convenience and assembly accuracy of wind turbine blades during the assembly process.

[0005] To achieve the above purpose, the present application provides the following technical solutions:

[0006] An assembly method for wind turbine blades includes:

[0007] Setting the web closing die gap, setting the total closing die gap H of the web inside the blade, and manufacturing the web based on this standard. The set gap between the web and a single shell is H / 2;

[0008] Pre-assembling the web, cleaning the auxiliary materials on the first shell of the blade, and setting a gap spacer with a thickness of H / 2 on the side of the first shell facing the web. The web is placed on the gap spacer and fixed;

[0009] Fixing the web, applying an adhesive on the side of the web facing the second shell, and flipping the mold of the second shell to close the mold with the web to bond the second shell and the web. After bonding, curing the bonding area of the second shell and the web;

[0010] The first housing is fixed. After the adhesive is cured, the web pressing tooling is adjusted according to the bonding state between the second housing and the web to fix the relative position between the web pressing tooling and the web. The clearance spacer is removed and the adhesive is applied, and the adhesive is cured by pressing with the web pressing tooling to fixedly connect the first housing and the web.

[0011] Preferably, in the above-mentioned assembly method of the wind turbine blade, the total mold clearance H is 8 mm - 12 mm, and the thickness of the clearance spacer is 4 mm - 6 mm.

[0012] Preferably, in the above-mentioned assembly method of the wind turbine blade, in the step of fixing the web, the adhesive is a structural adhesive, and after the second housing and the web are bonded, the structural adhesive is heated and cured by a heating device.

[0013] Preferably, in the above-mentioned assembly method of the wind turbine blade, the first housing is the leeward side housing and the second housing is the windward side housing, or

[0014] the first housing is the windward side housing and the second housing is the leeward side housing.

[0015] Preferably, in the above-mentioned assembly method of the wind turbine blade, the clearance spacer is provided only in the area where the first housing is connected to the web, or

[0016] the clearance spacer covers the side of the first housing facing the web.

[0017] Preferably, in the above-mentioned assembly method of the wind turbine blade, in the step of pre-assembling the web, the web is hoisted onto the clearance spacer, and the web is fixedly arranged above the clearance spacer through an auxiliary tooling.

[0018] Preferably, in the above-mentioned assembly method of the wind turbine blade, the side of the clearance spacer facing the web is provided with an adhesive surface and is adhesively connected to the web.

[0019] Preferably, in the above-mentioned assembly method of the wind turbine blade, the first housing and / or the second housing is provided with positioning blocks in the chord direction of the blade, and the positioning blocks abut and limit the web in the chord direction.

[0020] Preferably, in the above-mentioned assembly method of the wind turbine blade, one or more layers of release cloth are provided on the first housing and / or the second housing and are infused with the housing.

[0021] Preferably, in the above-mentioned assembly method of the wind turbine blade, the material of the clearance spacer is fiberglass, polyethylene or wood.

[0022] As can be seen from the above technical solution, for the assembly method of the wind turbine blade provided by the present disclosure, according to the total mold closing gap requirement of the wind turbine blade, the web is manufactured. The ideal assembly position of the web is equal to the distance between the shell structures on both sides of the blade. When assembling the web, first, the auxiliary materials on the first shell are cleaned to keep the installation position of the web on the first shell clean and accurate. After the first shell is cleaned, a gap spacer with a thickness of half of the total mold closing gap is laid, and the web is arranged on the gap spacer. The gap spacer is used to control the standard gap between the web and the first shell, so that the operator can adjust the unilateral gap between the web and the second shell; on this basis, the web and the second shell are fixed with an adhesive, and the mold closing operation is performed to connect the web and the second shell into a stable integral structure. Then, the web pressing tooling is adjusted to determine the relative position between the web pressing tooling and the web. At this time, the web is in the most ideal assembly position. At the same time, the gap spacer is removed and the positioning and pressing function of the web pressing tooling is utilized to complete the fixation of the web and the first shell to realize the assembly of the wind turbine blade; the above assembly method is easy to operate, and can perform unilateral adjustment on the web to reduce the deviation risk of the web and improve the assembly accuracy of the wind turbine blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic cross-sectional structure diagram during the assembly process of the wind turbine blade provided by the present disclosure;

[0025] Figure 2 It is a schematic flow chart of the assembly method of the wind turbine blade provided by the present disclosure.

[0026] Among them, 10 - web; 20 - first shell; 30 - second shell; 40 - gap spacer; 50 - adhesive. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The core of the present application is to disclose an assembly method of a wind turbine blade to improve the operation convenience and assembly accuracy during the assembly process of the wind turbine blade.

[0028] To enable those skilled in the art to better understand the solution of this application, the embodiments of this application will be described below with reference to the accompanying drawings. In addition, the embodiments shown below do not impose any limitation on the invention described in the claims. Furthermore, all the contents of the configurations shown in the following embodiments are not limited to what is necessary for the solution of the invention described in the claims.

[0029] As Figure 1 and Figure 2 shown, the present disclosure provides an assembly method for a wind turbine blade, which is used to improve the assembly accuracy of the web 10 and the shell in the wind turbine blade through precise gap control, thereby improving the overall performance and service life of the wind turbine blade. Specifically, the assembly method of the wind turbine blade at least includes the following steps:

[0030] S01: Setting the mold closing gap of the web. Set the total mold closing gap H of the web 10 inside the blade, and manufacture the web 10 based on this standard. The set gap between the web 10 and the single-sided shell is H / 2;

[0031] S02: Pre-assembling the web. Clean the auxiliary materials on the first shell 20 of the blade, and set a gap spacer 40 with a thickness of H / 2 on the side of the first shell 20 facing the web 10. The web 10 is placed on the gap spacer 40 and the web 10 is fixed;

[0032] S03: Fixing the web. Apply an adhesive 50 on the side of the web 10 facing the second shell 30, and flip the mold of the second shell 30 to close the mold with the web 10 to bond the second shell 30 and the web 10. After bonding, cure the bonding area of the second shell 30 and the web 10;

[0033] S04: Fixing the first shell. After the adhesive 50 is cured, adjust the web pressing tooling according to the bonding state between the second shell 30 and the web 10, fix the relative position of the web pressing tooling and the web 10, remove the gap spacer 40 and apply the adhesive 50, and press the cured adhesive 50 through the web pressing tooling to fixedly connect the first shell 20 and the web 10.

[0034] Specifically, during the process of the above assembly method, gap setting needs to be carried out first. Specifically, according to the design requirements of the wind turbine blade, set the total mold closing gap H of the web 10 inside the blade. It should be noted that the setting of the total mold closing gap H is based on the fitting accuracy between the web 10 and the shell and the requirements of subsequent bonding processes. At the same time, manufacture the web 10 based on the total mold closing gap H, so that the size of the web 10 can match the internal space of the shell. According to the actual assembly requirements, the set gap between the web 10 and the single-sided shell is H / 2. Such a design not only ensures that the web 10 can be smoothly installed inside the shell, but also reserves a suitable space for subsequent bonding operations.

[0035] In the pre-assembly step of the web 10, first, the auxiliary materials of the first housing 20 of the blade are cleaned to remove impurities, dust, etc. on the surface, ensuring the cleanliness of the housing surface and avoiding impurities from affecting the control of the assembly gap. At the same time, a gap spacer 40 with a thickness of H / 2 is provided on the side of the first housing 20 facing the web 10. The function of this gap spacer 40 is to form a fixed gap between the web 10 and the first housing 20 to ensure the accuracy of the relative position between the web 10 and the first housing 20. The web 10 is placed on the gap spacer 40 and fixed to the gap spacer 40 by an appropriate unlockable fixing method to prevent the web 10 from shifting during subsequent operations. For example, tools such as temporary jigs or tapes can be used to fix the web 10 to the gap spacer 40 to ensure its stable position.

[0036] In the fixing step of the web 10, first, an adhesive 50 is applied by scraping on the side of the web 10 facing the second housing 30, so as to form a stable fixing structure between the web 10 and the second housing 30 through the adhesive 50. After connection, the mold of the second housing 30 is flipped to perform a mold closing operation with the web 10. By applying a certain pressure, the adhesive 50 fully fills the gap between the web 10 and the second housing 30 to achieve their bonding. After bonding, the bonding area of the second housing 30 and the web 10 is cured. The curing process can be completed by natural curing or by using other auxiliary curing means to ensure that the adhesive 50 reaches sufficient connection strength, thereby ensuring a firm and reliable connection between the web 10 and the second housing 30.

[0037] After the fixing step of the web 10 is completed, the connection between the first housing 20 and the web 10 needs to be carried out. Specifically, after the adhesive 50 between the second housing 30 and the web 10 is cured, the web pressing tooling is adjusted according to the bonding state between the second housing 30 and the web 10 to adjust the position and pressure of the web pressing tooling, so that it can determine the relative position with the web 10 and the pressure action on the web 10 in the current state, and ensure that their positions remain stable during subsequent operations. Further, the web pressing tooling, the second housing 30, and the web 10 are removed, then the previously set gap spacer 40 is removed, and an adhesive 50 is applied to the gap between the first housing 20 and the web 10. Then, the web pressing tooling drives the second housing 30 and the web 10 to move to the previously determined position, and the adhesive 50 is pressed and cured by the web pressing tooling. Under the action of pressure, the adhesive 50 can better fill the gap and form a firm connection during the curing process, thereby realizing the fixed connection between the first housing 20 and the web 10 and completing the assembly process of the entire wind turbine blade.

[0038] The assembly method of this embodiment, through precise gap setting and reasonable assembly steps, first presets the gap between the first housing 20 and the web 10 through the gap spacer 40. After the web 10 and the second housing 30 are fixedly connected, the position and pressure action of the web pressing tooling are pre-adjusted. Then, the gap spacer 40 is removed and the adhesive 50 is applied. Through the preset position of the web pressing tooling, a preset pressure can be applied to the adhesive 50 and the first housing 20 through the web 10, and the relative position of the web 10 and the first housing 20 is kept fixed, thereby completing the assembly of the blade. The above steps can effectively improve the assembly accuracy and quality of the wind turbine blade, enhance the overall structural strength and stability of the blade, thereby improving the service life and operation reliability of the wind turbine blade, and providing a strong guarantee for the efficient operation of the wind power generation equipment.

[0039] Further, in some embodiments of the present invention, according to actual production experience and experimental data, the total mold closing gap H is set to 8 mm - 12 mm to be able to balance the assembly accuracy and bonding effect between the web 10 and the housing. It should be noted that when the total mold closing gap H is 8 mm, the fit between the web 10 and the housing is relatively tight, which can effectively reduce the voids inside the blade and improve the overall structural strength of the blade. This tight fit mode is particularly suitable for wind turbine blades with high requirements for blade structural strength, such as blades for large wind turbines. When the total mold closing gap H is 12 mm, it can provide enough space for the filling and curing of the adhesive 50 to ensure that the adhesive 50 can fully fill the gap and achieve a good bonding effect. This larger gap setting is particularly suitable for wind turbine blades with high requirements for bonding technology, such as blades operating in high humidity or low temperature environments.

[0040] Correspondingly, the thickness of the gap spacer 40 is 4 mm - 6 mm, and preferably when the total mold closing gap H is 8 mm, the thickness of the gap spacer 40 is correspondingly set to 4 mm, which can ensure the uniformity of the gap between the web 10 and the first housing 20 and at the same time provide enough space for the filling of the adhesive 50. When the total mold closing gap H is 12 mm, the thickness of the gap spacer 40 is correspondingly set to 6 mm, which can ensure the stability of the web 10 during the assembly process and the uniform distribution of the adhesive 50 during the bonding process.

[0041] It should also be noted that in actual production, according to the specific application scenarios and design requirements of wind turbine blades, an appropriate total mold gap H and the thickness of the spacer block 40 can be selected. For example, for wind turbine blades with medium strength requirements, a total mold gap H of 10 mm and a spacer block 40 thickness of 5 mm can be selected. This setting of intermediate values can balance the bonding effect and assembly efficiency while ensuring structural strength. By limiting the total mold gap H and the thickness of the spacer block 40 within the above range, the assembly process of wind turbine blades can be further optimized, the assembly efficiency and quality can be improved, and the performance and reliability of wind turbine blades during actual operation can be ensured.

[0042] Furthermore, in some embodiments of the present invention, in the step of fixing the web 10, the adhesive 50 used is a structural adhesive. As a high-performance adhesive material, the structural adhesive has high bonding strength and good mechanical properties, and can meet the requirements of various loads and stresses borne by wind turbine blades during operation. At the same time, after the second housing 30 and the web 10 are bonded, the structural adhesive is heated and cured by a heating device. The heating and curing method can accelerate the curing process of the structural adhesive, shorten the curing time, and improve production efficiency. At the same time, heating and curing can also make the structural adhesive form a more uniform molecular structure during curing, further improving the bonding strength and durability.

[0043] Furthermore, for the assembly method of the wind turbine blade provided in the embodiment of the present invention, the blade is usually divided into a pressure side (PS) housing and a suction side (SS) housing. The pressure side housing is the housing part directly facing the oncoming wind, and its shape and structure design have an important impact on the aerodynamic performance of the blade; the suction side housing is the housing part opposite to the pressure side housing, mainly playing a role of support and balance. In this embodiment, the first housing 20 can be the suction side housing, and the second housing 30 is the pressure side housing. During the assembly process, first, the auxiliary materials of the suction side housing are cleaned and the spacer block 40 is set, then the web 10 is pre-installed on the suction side housing, and then the mold of the pressure side housing is flipped to perform mold closing and bonding with the web 10, and finally the connection between the suction side housing and the web 10 is fixed. This assembly sequence can ensure the connection accuracy between the web 10 and the suction side housing, and at the same time, utilize the structural characteristics of the pressure side housing to enhance the overall aerodynamic performance of the blade.

[0044] In some other embodiments of the present invention, the first housing 20 can also be the pressure side housing, and the second housing 30 is the suction side housing. The corresponding assembly process starts from the pressure side housing. First, the pressure side housing is cleaned and the spacer block is set, then the web 10 is pre-installed on the pressure side housing, and then the mold of the suction side housing is flipped to perform mold closing and bonding with the web 10, and finally the connection between the pressure side housing and the web 10 is fixed.

[0045] The assembly method provided in the above embodiment can ensure the accurate assembly and firm connection between the web 10 and the housing for different housing assembly sequences of the web 10.

[0046] Further, in some embodiments of the present invention, the clearance pads 40 are only arranged in the area where the web 10 is connected to the first housing 20. According to the clearance size required by the design, the clearance pads 40 are precisely placed so that the web 10 can be accurately installed at the predetermined position. This way of locally arranging the clearance pads 40 can effectively reduce material waste and improve the assembly efficiency at the same time.

[0047] In some other embodiments of the present invention, the clearance pads 40 are arranged to cover the side of the first housing 20 facing the web 10, so that a uniform clearance can be formed between the web 10 and the entire surface of the first housing 20, and the overall fitting accuracy between the web 10 and the first housing 20 can be better ensured. When the surface of the first housing 20 is relatively complex or the installation position of the web 10 is relatively free, the way of covering the clearance pads 40 can be adopted to improve the assembly efficiency.

[0048] Further, in the assembly method provided in the embodiments of the present invention, in the pre-assembly step of the web 10, the web 10 is first lifted onto the clearance pads 40 by means of hoisting. Hoisting is a mature material handling method, which can ensure the stability of the web 10 during handling and can accurately place it at the predetermined position. After the web 10 is hoisted onto the clearance pads 40, the web 10 is fixedly arranged above the clearance pads 40 by means of an auxiliary tooling. The use of the auxiliary tooling can further improve the installation accuracy and stability of the web 10. For example, positioning jigs or support frames and other auxiliary toolings can be used to firmly arrange the web 10 on the clearance pads 40 to prevent the web 10 from shifting or shaking during subsequent operations. The design of the auxiliary tooling can be customized according to the shape and size of the web 10 to ensure that it can closely cooperate with the web 10 and the clearance pads 40. In actual operation, the auxiliary tooling can be fixed on the clearance pads 40 by means of bolts, buckles or magnetic devices, etc., so as to realize the stable support of the web 10. By adopting the method of hoisting and fixing with the auxiliary tooling for the pre-assembly of the web 10, the operation efficiency and installation accuracy in the wind turbine blade assembly process can be effectively improved, and the quality problems caused by improper installation can be reduced.

[0049] In order to further improve the stability of the web 10 disposed on the gap spacer 40, in some embodiments of the present invention, an adhesive surface may be provided on the side of the gap spacer 40 facing the web 10, so as to be adhesively connected to the web 10, thereby maintaining the relative fixed position effect between the gap spacer 40 and the web 10; and in some other embodiments of the present invention, a recessed groove is provided on the side of the gap spacer 40 facing the web 10, so that the side edge of the web 10 can be embedded in the recessed groove, which not only increases the contact area between the web 10 and the gap spacer 40, thereby improving the stability of the web 10 on the gap spacer 40, but also effectively prevents the web 10 from sliding or shifting on the gap spacer 40 through the limiting action of the recessed groove, ensuring the accurate relative position between the web 10 and the gap spacer 40.

[0050] The shape and size of the recessed groove can be designed according to the shape of the side edge of the web 10 to ensure a tight fit between the two. If the side edge of the web 10 is rectangular, the recessed groove can also be designed as rectangular, and its depth and width can be adjusted according to the thickness of the gap spacer 40 and the size of the web 10, as long as the gap control requirements between the first housing 20 and the web 10 are met.

[0051] Furthermore, in some embodiments of the present invention, a positioning block is further provided on at least one of the first housing 20 and the second housing 30. The positioning block abuts and limits the web 10 in the chord direction of the blade. The positioning block is used to ensure that the web 10 can be accurately positioned at a predetermined position during the assembly process and remain stable during subsequent bonding and curing processes. For example, in some embodiments of the present invention, a positioning block is provided on the first housing 20, and the positioning block can be closely attached to the side edge of the web 10 to limit the web 10 in the chord direction. When the web 10 contacts and is fixed to the first housing 20, the positioning block can play a role of blocking and positioning to prevent the web 10 from moving in the transverse direction. Similarly, providing a positioning block on the second housing 30 can also play a similar limiting role.

[0052] By providing a positioning block on the housing, the assembly accuracy and stability of the web 10 can be effectively improved, and the quality problems caused by the position deviation of the web 10 can be reduced. During the actual assembly process, the positioning block can ensure the accurate relative position between the web 10 and the housing, providing a good basis for subsequent bonding operations.

[0053] In addition, it should be noted that at least one of the first housing 20 and the second housing 30 is further provided with one or more layers of demolding cloth poured with the housing. The demolding cloth is a commonly used mold demolding material, which has good demolding performance and mechanical strength. It should be noted that in the manufacturing process of wind turbine blades, the housing is usually formed by pouring in a mold, and setting a demolding cloth on the inner surface of the mold can effectively prevent adhesion between the housing and the mold, facilitating the demolding operation of the housing. By setting one or more layers of demolding cloth on the housing, the demolding effect and the surface quality of the housing can be further improved, making it easier for the housing to be demolded from the mold and reducing scratches and damages on the surface of the housing. At the same time, it should be noted that the number of layers of the demolding cloth can be adjusted according to the complexity of the housing and the demolding difficulty. For a housing with a more complex shape, multiple layers of demolding cloth can be set to ensure the smooth progress of the demolding process. The material of the demolding cloth is usually selected from high-temperature resistant and corrosion-resistant fiber materials, such as glass fiber or carbon fiber. These materials not only have good demolding performance but also can remain stable in a high-temperature environment to meet the actual production requirements.

[0054] Furthermore, in the assembly method of the wind turbine blade provided in the embodiment of the present invention, the material of the gap spacer 40 can be selected from fiberglass, polyethylene or wood. When actually selecting the material of the gap spacer 40, comprehensive consideration can be made according to the specific structure and assembly requirements of the wind turbine blade; for the assembly parts that require higher strength and stability, the gap spacer 40 made of fiberglass can be selected; for the parts that require certain flexibility and wear resistance, the gap spacer 40 made of polyethylene can be selected; and for some parts with higher requirements for cost and processing performance, the gap spacer 40 made of wood can be selected, all of which can meet the gap control requirements of the gap spacer 40 for the first housing 20 and the web 10.

[0055] The terms "first", "second", "left side" and "right side" in the specification, claims and above-mentioned drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units not listed.

[0056] The above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for assembling a wind turbine blade, characterized in that: include: Web plate mold clearance setting: setting the total mold clearance H of the web plate inside the blade, and manufacturing the web plate based on this standard. The set clearance between the web plate and the single-side shell is H / 2; The web is pre-installed, the auxiliary materials of the first shell of the blade are cleaned, and a gap pad with a thickness of H / 2 is arranged on the side of the first shell facing the web, and the web is arranged on the gap pad and fixed; The web is fixed, adhesive is applied on the side of the web facing the second shell, and the mold of the second shell is turned over to close the mold with the web to bond the second shell and the web, and after bonding, the bonding area of ​​the second shell and the web is cured; After the first shell is fixed and the adhesive is cured, the web pressing tool is adjusted according to the bonding state of the second shell and the web, the relative positions of the web pressing tool and the web are fixed, the gap pad is removed and the adhesive is applied, and the adhesive is cured by pressing down with the web pressing tool to fix the first shell and the web.

2. The method for assembling a wind turbine blade according to claim 1, characterized in that: The total mold clearance H is 8mm-12mm, and the thickness of the clearance pad is 4mm-6mm.

3. The method for assembling a wind turbine blade according to claim 1, characterized in that: In the web fixing step, the adhesive is a structural adhesive, and after the second shell and the web are bonded, the structural adhesive is heated and cured by a heating device.

4. The method for assembling a wind turbine blade according to claim 1, characterized in that: The first shell is a leeward shell, and the second shell is a windward shell, or the first shell is a windward shell, and the second shell is a leeward shell.

5. The method for assembling a wind turbine blade according to claim 1, characterized in that: The gap spacer is only provided in the area where the first shell is connected to the web, or, The gap pad is arranged to cover a side of the first shell facing the web.

6. The method for assembling a wind turbine blade according to claim 1, characterized in that: In the web pre-installation step, the web is hoisted onto the gap pad, and the web is fixedly disposed above the gap pad by auxiliary tooling.

7. The wind turbine blade assembly method according to claim 6, characterized in that: The gap pad is provided with a bonding surface on one side facing the web and is bonded and connected to the web.

8. The method for assembling a wind turbine blade according to claim 1, characterized in that: The first shell and / or the second shell is provided with a positioning block in the chord direction of the blade, and the positioning block abuts against and limits the web in the chord direction.

9. The method for assembling a wind turbine blade according to claim 1, characterized in that: The first shell and / or the second shell is provided with one or more layers of demoulding cloth poured along with the shell.

10. The method for assembling a wind turbine blade according to any one of claims 1 to 9, characterized in that: The material of the gap pad is glass fiber reinforced plastic, polyethylene or wood.

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