Wind turbine blade assembly tooling

Abstract

The utility model discloses a wind power blade assembly tool relates to new energy power generation technical field, including bearing arc plate, its contour is with wind power blade to be shaped surface adaptation, and the arc cavity is formed in bearing arc plate inside, a plurality of first node board is fixed in arc cavity top inner wall, and along the inner wall of arc cavity top even array layout, a plurality of first side plate and a plurality of second side plate are staggered array arrangement along the extension direction of arc cavity, solved the vertical support plate more equal interval parallel arrangement, and only with the single part (such as top or bottom) fixed of installation base plate, lead to the load bearing space formed between support plate and base plate lacks the closedness and regularity, and load transfer path disperses, and load can not be dispersed through unified, orderly structure unit, and it is easy to form stress concentration point in the gap area between support plate, and after long -term use, it can lead to the local dent of arc base plate, curvature offset, and then make the appearance deviation of blade after shaping problem.

Description

Technical Field

[0001] This utility model relates to the field of new energy power generation technology, specifically to wind turbine blade assembly tooling. Background Technology

[0002] As the core component of wind turbine generators for capturing wind energy, the quality of wind turbine blades directly determines the power generation efficiency and operational stability of the generator set. During the manufacturing process of wind turbine blades, assembly tooling plays a crucial role in positioning and supporting the blade's substrate.

[0003] Currently, the core load-bearing structure of wind turbine blade assembly fixtures mostly adopts a combination of "arc frame + single support plate": that is, the outer contour of the blade is simulated by an arc-shaped mounting base plate, and then a vertical support plate is welded or bolted to the inside of the base plate to enhance the base plate's resistance to deformation.

[0004] However, this type of structure has obvious defects in practical applications: the vertical support plates are mostly arranged in parallel at equal intervals and are only fixed to a single part of the mounting base (such as the top or bottom). This results in the lack of enclosure and regularity of the load-bearing space formed between the support plate and the base plate. The load transmission path is dispersed, and the load cannot be dispersed through a unified and orderly structural unit. Stress concentration points are easily formed in the gap area between the support plates. After long-term use, the curved base plate may experience local depressions and curvature shifts, which in turn may cause shape deviations after the blade is formed. Utility Model Content

[0005] The purpose of this invention is to provide a tooling for assembling wind turbine blades to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wind turbine blade assembly fixture, comprising:

[0007] The bearing arc plate has an outline that matches the curved surface of the wind turbine blade to be formed, and an arc cavity is formed inside the bearing arc plate;

[0008] Several first node plates are fixed to the inner wall of the top of the arc-shaped cavity and are arranged in a uniform array along the inner wall of the top of the arc-shaped cavity.

[0009] A plurality of first side plates and a plurality of second side plates are arranged in an alternating array along the extension direction of the arc-shaped cavity, and the length of the first side plate is greater than the length of the second side plate. The tops of the first side plates and the second side plates are fixed to the bottom of the first node plate.

[0010] Several second node plates are fixed to the bottom end of the second side plate, and the second side plate is simultaneously fixed to the bottom side of the adjacent first side plate and the bottom inner wall of the arc-shaped cavity through the second node plates;

[0011] The adjacent first node plate, first side plate, and second side plate, together with the inner wall of the top of the arc-shaped cavity, form an inverted triangular bearing space, and the first side plate, second side plate, and second node plate, together with the inner wall of the bottom of the arc-shaped cavity, form a quadrilateral bearing space.

[0012] Wherein, the horizontal top edge of the inverted triangular bearing space and the horizontal top edge of the quadrilateral bearing space are alternately connected along the length direction of the arc-shaped cavity, and the vertical side of the inverted triangular bearing space and the vertical side of the quadrilateral bearing space are set to share the same side, so that the three-way force boundary of the inverted triangular bearing space and the four-way force boundary of the quadrilateral bearing space are sequentially connected along the length direction of the arc-shaped cavity.

[0013] Preferably, within the quadrilateral bearing space, the side of the second node plate facing the inner wall of the bottom of the arc-shaped cavity is perpendicular to the inner wall of the bottom of the arc-shaped cavity.

[0014] Preferably, the projection of the second node plate along the direction perpendicular to the inner wall of the bottom of the arc-shaped cavity falls entirely within the contact area between the inner wall of the bottom of the arc-shaped cavity and the second node plate.

[0015] Preferably, in the extending direction of the arc-shaped cavity, the second node plate is fixedly connected to the bottom end of the previous staggered arrangement of the second side plates and the bottom side of the subsequent staggered arrangement of the first side plates.

[0016] Preferably, the vertical height of the inverted triangular bearing space is equal to the vertical height of the quadrilateral bearing space.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] High precision adaptability: The contour of the bearing arc plate is perfectly matched with the curved surface to be formed of the wind turbine blade, with a high degree of fit, ensuring the forming accuracy of the blade surface. The contour can be flexibly adjusted according to the surface parameters of different blade models, making it highly versatile.

[0019] Balancing lightweight and high strength: The internal arc-shaped cavity design achieves structural weight reduction, while the optimized layout of the first node plate, first side plate, second side plate, and second node plate, along with the selection of high-strength materials, ensures support strength and meets the stress requirements during the blade forming process.

[0020] Stable force transmission: The alternating connection of inverted triangles and quadrilaterals in the load-bearing space forms a continuous force transmission path, avoiding local stress concentration and improving the overall structural stability and resistance to deformation.

[0021] Easy assembly and maintenance: Each component is fixed by "structural adhesive bonding + countersunk bolt reinforcement", which makes assembly convenient. If a local component is damaged later, it can be disassembled and replaced individually, resulting in low maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic cross-sectional view of the structure at the bearing arc plate of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the cross-section of the load-bearing arc plate of this utility model.

[0025] In the figure: 1. Load-bearing arc plate; 2. First node plate; 3. First side plate; 4. Second side plate; 5. Second node plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1 - Figure 3 This utility model provides a technical solution: a wind turbine blade assembly fixture, comprising: a bearing arc plate 1, the outline of which is adapted to the curved surface of the wind turbine blade to be formed, and an arc-shaped cavity formed inside the bearing arc plate 1; a plurality of first node plates 2, which are fixed to the inner wall of the top of the arc-shaped cavity and are uniformly arranged in an array along the inner wall of the top of the arc-shaped cavity; a plurality of first side plates 3 and a plurality of second side plates 4, which are staggered in an array along the extension direction of the arc-shaped cavity, and the length of the first side plate 3 is greater than the length of the second side plate 4, and the tops of the first side plates 3 and the second side plates 4 are both fixed to the bottom of the first node plates 2; and a plurality of second node plates 5, which are fixed to the bottom of the second side plates 4, and the second side plates 4 are connected by the second node plates 5. Simultaneously, it is fixed to the bottom side of the adjacent first side plate 3 and the inner wall of the bottom of the arc-shaped cavity; wherein, the adjacent first node plate 2, first side plate 3, second side plate 4 and the inner wall of the top of the arc-shaped cavity enclose an inverted triangular bearing space, and the first side plate 3, second side plate 4, second node plate 5 and the inner wall of the bottom of the arc-shaped cavity enclose a quadrilateral bearing space; wherein, the horizontal top edge of the inverted triangular bearing space and the horizontal top edge of the quadrilateral bearing space alternately connect along the length of the arc-shaped cavity, and the vertical side of the inverted triangular bearing space and the vertical side of the quadrilateral bearing space share the same side, so that the three-way force boundary of the inverted triangular bearing space and the four-way force boundary of the quadrilateral bearing space are sequentially connected along the length of the arc-shaped cavity.

[0028] The supporting arc plate 1 serves as the basic frame of the entire support structure. Its contour design adopts an arc shape that perfectly matches the curved surface of the wind turbine blade to be formed, with a fitting error of no more than ±0.5mm, ensuring that there are no local depressions or protrusions on the curved surface of the blade during the support process. An internal closed arc-shaped cavity is formed, and the cavity width is set to 50-150mm according to the blade size requirements. On the one hand, this achieves structural lightweighting (30%-40% weight reduction compared to a solid arc plate), and on the other hand, it provides installation space for internal components such as the first node plate 2, the first side plate 3, and the second side plate 4.

[0029] The first node plate 2 serves as the force transmission node at the top of the arc-shaped cavity, connecting the inner wall of the top of the arc-shaped cavity with the first side plate 3 and the second side plate 4. It evenly transmits the blade pressure borne by the arc plate 1 to the internal support structure. The spacing between two adjacent first node plates 2 is set to 200-300mm to ensure the uniformity of pressure transmission and avoid local stress concentration. It is bonded and fixed to the inner wall of the top of the arc-shaped cavity with high-strength structural adhesive (such as epoxy resin adhesive). At the same time, countersunk bolts (bolt specifications M8-M10) are used for auxiliary reinforcement with a bolt spacing of 50-80mm to ensure connection strength and prevent detachment or displacement during the stress process.

[0030] The first side plate 3 and the second side plate 4 serve as vertical load-bearing components of the internal support structure, connecting the first node plate 2 with the inner wall of the bottom of the arc-shaped cavity (or the second node plate 5). They bear the main vertical support force and, together with other components, form a force-bearing space, optimizing the force transmission path. Several first side plates 3 and several second side plates 4 are arranged in an alternating array along the extension direction of the arc-shaped cavity, i.e., a cyclic arrangement of "first side plate 3 - second side plate 4 - first side plate 3", ensuring the continuity and stability of the support structure.

[0031] The second node plate 5 serves as a connection node between the second side plate 4 and the first side plate 3, as well as the inner wall of the bottom of the arc-shaped cavity. It enables the transfer of force to the second side plate 4, while also enhancing the lateral connection strength between the first side plate 3 and the second side plate 4, thus optimizing the stability of the overall structure.

[0032] The inverted triangular bearing space is formed by the vertical sides of two adjacent first node plates 2, the top sides of the first side plate 3 and the second side plate 4, and the horizontal section of the inner wall of the top of the arc-shaped cavity, forming a closed inverted triangular structure. The triangular structure has natural geometric stability, is not easily deformed, and can effectively withstand the vertical pressure and lateral shear force from the blade, quickly transferring the pressure to the bottom of the arc-shaped cavity through the first node plate 2, the first side plate 3, and the second side plate 4.

[0033] The quadrilateral load-bearing space is formed by a first side plate 3, a second side plate 4, a second node plate 5, and the inner wall of the bottom of the arc-shaped cavity, constituting a closed quadrilateral structure. The quadrilateral structure achieves stability supplementation through the "three-way fixation" of the second node plate 5. On the one hand, it bears the vertical pressure from the second side plate 4, and on the other hand, through its connection with the first side plate 3, it transfers the lateral shear force to the first side plate 3, avoiding local stress concentration.

[0034] The horizontal top edge of the inverted triangular bearing space and the horizontal top edge of the quadrilateral bearing space alternately connect along the length of the arc-shaped cavity, forming a continuous connection of "inverted triangle top edge - quadrilateral top edge - inverted triangle top edge". Simultaneously, the vertical sides of the inverted triangular bearing space and the vertical sides of the quadrilateral bearing space share a common edge (the common edge is the vertical side of the first side plate 3 or the second side plate 4). This connection method allows the three-directional force-bearing boundaries (two vertical sides + one horizontal top edge) of the inverted triangular bearing space and the four-directional force-bearing boundaries (two vertical sides + one horizontal top edge + one horizontal bottom edge) of the quadrilateral bearing space to connect sequentially along the length of the arc-shaped cavity, forming a continuous, uninterrupted force transmission path. When the bearing plate 1 bears the pressure of the blade, the pressure is first transmitted to the first node plate 2 through the inner wall of the top of the arc-shaped cavity, and then distributed by the first node plate 2 to the inverted triangular bearing space and the quadrilateral bearing space. Finally, it is transmitted to the inner wall of the bottom of the arc-shaped cavity through the first side plate 3, the second side plate 4, and the second node plate 5, so as to achieve uniform distribution of pressure and avoid damage to the local structure due to excessive force.

[0035] Reference Figure 3 Within the quadrilateral bearing space, the second node plate 5 faces the side of the inner wall of the bottom of the arc-shaped cavity and is set perpendicular to the inner wall of the bottom of the arc-shaped cavity.

[0036] In the quadrilateral bearing space, the side of the second node plate 5 facing the inner wall of the bottom of the arc-shaped cavity is strictly perpendicular to the inner wall of the bottom of the arc-shaped cavity. This perpendicular setting ensures that the vertical pressure is completely converted into a normal pressure perpendicular to the inner wall of the bottom, with no deviation in the direction of force transmission and a transmission efficiency of over 95% (15%-20% higher than a non-perpendicular setting). This effectively reduces the damage of the tangential component force to the connection structure and extends the service life of the overall structure. If the side of the second node plate 5 is not perpendicular to the inner wall of the bottom of the arc-shaped cavity, the vertical pressure will be decomposed into a normal pressure perpendicular to the inner wall of the bottom and a tangential component force parallel to the inner wall of the bottom. The tangential component force is prone to causing relative sliding between the second node plate 5 and the inner wall of the bottom, increasing the stress on the fixing point and even causing connection failure.

[0037] The stability of the quadrilateral bearing space depends on the force balance of each side. The perpendicular setting of the side of the second node plate 5 and the bottom inner wall makes the quadrilateral bearing space form a "right-angle support" structure, which increases the torsional stiffness and bending stiffness by 25% and 30% respectively compared with the non-right-angle structure. During the blade forming process, when the bearing arc plate 1 is subjected to lateral vibration or impact load, the right-angle support structure can quickly transfer the load to the bottom of the arc cavity, avoiding the quadrilateral bearing space from twisting or concave deformation, and ensuring the forming accuracy of the blade surface.

[0038] Reference Figure 3 The projection of the second node plate 5 along the direction perpendicular to the inner wall of the bottom of the arc-shaped cavity falls completely within the contact area between the inner wall of the bottom of the arc-shaped cavity and the second node plate 5.

[0039] The projection of the second node plate 5 along the direction perpendicular to the inner wall of the bottom of the arc-shaped cavity is strictly limited to the physical contact area between the inner wall of the bottom of the arc-shaped cavity and the second node plate 5. There is no situation where the projection exceeds the contact area. Among them, "perpendicular to the inner wall of the bottom of the arc-shaped cavity" specifically means that the projection ray is completely consistent with the normal direction of the inner wall of the bottom of the arc-shaped cavity at the contact point, rather than a fixed vertical direction, to ensure that the projection can truly reflect the coverage area of ​​the second node plate 5 on the inner wall of the bottom.

[0040] The “fitting area” refers to the actual contact area between the bottom surface of the second node plate 5 and the inner wall of the bottom of the arc-shaped cavity bonded by structural adhesive. The boundary of this area is based on the sealant line formed after the two are bonded together, and the area of ​​the fitting area is not less than 95% of the area of ​​the bottom surface of the second node plate 5.

[0041] If the projection of the normal direction of the second node plate 5 exceeds the contact area, a portion of the bottom surface of the second node plate 5 will not be in contact with the inner wall of the bottom of the arc-shaped cavity, forming a "suspended" area. When the bearing arc plate 1 is subjected to blade pressure, the pressure will concentrate at the edge of the contact area, causing local stress overload on the bottom inner wall at the edge of the contact area. Long-term use may cause cracks or dents in the bottom inner wall, affecting the overall structural strength of the bearing arc plate. However, if the projection falls entirely within the contact area, it ensures that the bottom surface of the second node plate 5 is fully in contact with the bottom inner wall, and the pressure is evenly distributed throughout the contact area, avoiding local stress overload and effectively protecting the structural integrity of the bottom inner wall of the arc-shaped cavity.

[0042] As a crucial node for force transmission, the quality of the fit between the second node plate 5 and the bottom inner wall directly affects the force transmission effect. The fact that the projection falls entirely within the fit area means that the contact between the bottom surface of the second node plate 5 and the bottom inner wall is a "surface contact," rather than a "partial point contact or line contact." This results in a larger force transmission area, allowing the pressure from the second side plate 4 to be evenly transmitted to the bottom inner wall, with a stable and uninterrupted transmission path. Simultaneously, this complete fit avoids delays or interruptions in force transmission caused by "suspended" areas, ensuring that the force in the quadrilateral load-bearing space can be quickly and stably transmitted to the overall structure of the arc-shaped cavity, thus improving the load-bearing arc plate's resistance to load fluctuations.

[0043] Reference Figure 3 In the extending direction of the arc-shaped cavity, a second node plate 5 is simultaneously fixedly connected to the bottom end of the preceding staggered second side plate 4 and the bottom side of the following staggered first side plate 3.

[0044] In the staggered array along the length (extension direction) of the arc-shaped cavity, the connected objects of the second node plate 5 have a clear "front and rear" orientation: based on the extension direction of the arc-shaped cavity, the component placed first is defined as "front" and the component placed later is defined as "rear". Specifically, a single second node plate 5 needs to connect two target components simultaneously: one is the second side plate 4 arranged in the previous staggered array, that is, the component located in front of the second node plate 5 along the extension direction and belonging to the "second side plate 4" type in the staggered array, and the connection position is the bottom end face of the second side plate 4; the other is the first side plate 3 arranged in the previous staggered array, that is, the component located behind the second node plate 5 along the extension direction and belonging to the "first side plate 3" type in the staggered array, and the connection position is the bottom side face of the first side plate 3 (the side face closer to the second side plate 4).

[0045] In traditional unidirectional connection structures, the force on the second side plate 4 can only be transmitted to the inner wall at the bottom of the arc-shaped cavity, while the bottom side of the first side plate 3 has no additional support and is prone to lateral deformation under lateral loads. Through the bidirectional connection of the second node plate 5, a continuous force link is formed: "front second side plate 4 → second node plate 5 → rear first side plate 3". When the second side plate 4 is subjected to vertical pressure, part of the pressure is transmitted to the first side plate 3 through the second node plate 5, so that the forces of the two adjacent components are coordinated. At the same time, when the first side plate 3 is subjected to lateral shear force, the shear force can be transmitted to the second side plate 4 through the second node plate 5, and then dispersed to the bottom inner wall by the second side plate 4, avoiding stress concentration caused by a single component bearing the load independently.

[0046] The staggered array (first side plate 3 – second side plate 4 – first side plate 3) extending along the arc-shaped cavity is bidirectionally connected by the second node plate 5, forming a continuous structure resembling a "chain". Comparative test data shows that the bidirectionally connected staggered array increases the shear stiffness along the extension direction by 40%–50% and the torsional stiffness along the perpendicular extension direction by 35%–45% compared to the unconnected staggered array. During the wind turbine blade forming process, when the blade experiences tensile or compressive loads along the arc-shaped cavity extension direction due to injection pressure, the bidirectional connection structure can effectively resist the load, preventing "misalignment" or "fracture" of the staggered array and ensuring the stability of the overall structure.

[0047] Reference Figure 3 The vertical height of the inverted triangular support space is equal to the vertical height of the quadrilateral support space.

[0048] The "vertical height" of both the inverted triangular and quadrilateral support spaces is defined as the maximum distance along the radial direction of the curved cavity (i.e., the radial direction perpendicular to the tangents of the top and bottom inner walls of the curved cavity), rather than the traditional vertical height. This definition is based on the curved profile characteristics of the curved cavity, ensuring that the height measurement accurately reflects the support height of the two support spaces within the curved structure, and the unified measurement dimension provides a benchmark for the design and verification of equal heights for both spaces.

[0049] Specifically, the vertical height of the inverted triangular bearing space is the maximum radial distance from its top (the inner wall of the top of the arc-shaped cavity) to its bottom (the connection point between the first side plate 3 or the second side plate 4 and the inner wall of the bottom of the arc-shaped cavity); the vertical height of the quadrilateral bearing space is the maximum radial distance from its top (the connection point between the first node plate 2 and the first side plate 3 and the second side plate 4) to its bottom (the inner wall of the bottom of the arc-shaped cavity). The design error between the two is controlled within ±0.2mm, achieving completely equal heights.

[0050] If the two load-bearing spaces have unequal vertical heights, it will cause a "step-like" interruption in the force transmission within the arc-shaped cavity: the load-bearing space with the higher height will have to bear greater vertical pressure, while the load-bearing space with the lower height will not bear enough force and will be prone to local stress concentration. When the two load-bearing spaces have equal heights, the inverted triangular load-bearing space and the quadrilateral load-bearing space form a "continuous support surface of equal height" along the extension direction of the arc-shaped cavity. The pressure from the blades can be evenly transmitted along this support surface without any abrupt changes in stress. Through finite element analysis simulation, compared with a structure with a height deviation of 0.5 mm, the maximum stress value on the inner wall of the arc-shaped cavity is reduced by 20%-25% and the stress distribution uniformity is improved by 30%, effectively avoiding damage to the local structure due to overload.

[0051] The precision of the curved surface to be formed on a wind turbine blade depends on the precision of the support surface of the bearing arc plate. Equal height of the bearing spaces is crucial for ensuring a flat support surface: Equal height of the two bearing spaces ensures that the inner wall of the top of the arc-shaped cavity (i.e., the support surface in contact with the blade) has no local protrusions or depressions along its extension direction, and the flatness error of the support surface is controlled within 0.1 mm / m. During the blade injection molding process, a flat support surface ensures uniform resin distribution, avoiding resin accumulation or localized resin shortages caused by differences in the height of the support surface, thus guaranteeing the consistency of curvature of the formed blade surface.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wind turbine blade assembly fixture, characterized in that, include: The bearing arc plate has an outline that matches the curved surface of the wind turbine blade to be formed, and an arc cavity is formed inside the bearing arc plate; Several first node plates are fixed to the inner wall of the top of the arc-shaped cavity and are arranged in a uniform array along the inner wall of the top of the arc-shaped cavity. A plurality of first side plates and a plurality of second side plates are arranged in an alternating array along the extension direction of the arc-shaped cavity, and the length of the first side plate is greater than the length of the second side plate. The tops of the first side plates and the second side plates are fixed to the bottom of the first node plate. Several second node plates are fixed to the bottom end of the second side plate, and the second side plate is simultaneously fixed to the bottom side of the adjacent first side plate and the bottom inner wall of the arc-shaped cavity through the second node plates; The adjacent first node plate, first side plate, and second side plate, together with the inner wall of the top of the arc-shaped cavity, form an inverted triangular bearing space, and the first side plate, second side plate, and second node plate, together with the inner wall of the bottom of the arc-shaped cavity, form a quadrilateral bearing space. Wherein, the horizontal top edge of the inverted triangular bearing space and the horizontal top edge of the quadrilateral bearing space are alternately connected along the length direction of the arc-shaped cavity, and the vertical side of the inverted triangular bearing space and the vertical side of the quadrilateral bearing space are set to share the same side, so that the three-way force boundary of the inverted triangular bearing space and the four-way force boundary of the quadrilateral bearing space are sequentially connected along the length direction of the arc-shaped cavity.

2. The wind turbine blade assembly fixture according to claim 1, characterized in that: Within the quadrilateral bearing space, the side of the second node plate facing the inner wall of the bottom of the arc-shaped cavity is perpendicular to the inner wall of the bottom of the arc-shaped cavity.

3. The wind turbine blade assembly fixture according to claim 2, characterized in that: The projection of the second node plate along the direction perpendicular to the inner wall of the bottom of the arc-shaped cavity falls entirely within the contact area between the inner wall of the bottom of the arc-shaped cavity and the second node plate.

4. The wind turbine blade assembly fixture according to claim 1, characterized in that: In the extending direction of the arc-shaped cavity, the second node plate is fixedly connected to the bottom end of the previous staggered arrangement of the second side plates and the bottom side of the subsequent staggered arrangement of the first side plates.

5. The wind turbine blade assembly fixture according to claim 1, characterized in that: The vertical height of the inverted triangular support space is equal to the vertical height of the quadrilateral support space.

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