Wind power blade root baffle and installation positioning device and installation method thereof

Abstract

The invention belongs to the technical field of wind power blade production and manufacturing, and particularly relates to a wind power blade root baffle and an installation positioning device and an installation method.The baffle comprises a main baffle, one end of the main baffle is matched with the inner wall of a windward side blade root, and the other end of the main baffle is matched with the inner wall of a leeward side blade root; splicing blocks are arranged in the notches of the main baffle to form a complete baffle; the installation positioning device comprises a connecting rod, one end of the connecting rod is provided with a positioning assembly, and the other end of the connecting rod is provided with a locking assembly. The main baffle is mounted on the inner wall of the first blade root of the blade during die assembly, and the main baffle is mounted on the inner wall of the second blade root of the blade during die assembly; by mounting the main baffle, the weight of the baffle mounting part each time can be reduced, and then the mounting risk is reduced; before mold closing, the main baffle is installed, and during mold closing, the main baffle supports the root weight of the windward side and the leeward side of the blade, so that the root of the blade is prevented from deforming.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind turbine blade production and manufacturing, and in particular relates to a wind turbine blade root baffle and an installation and positioning device and an installation method thereof. Background Art

[0002] Wind energy is an environmentally friendly renewable energy source with good development prospects. It is an important component of the future energy structure. Wind turbine blades are the core components for converting wind energy into electrical energy. They are also the main basis for measuring the design and process reliability of wind turbines. The quality of the blades directly affects the life of the unit. There are generally three wind turbine blades. The blades are installed on the variable pitch bearing of the whole machine through the blade root bolts. The blades will deform during operation. The adhesive residues remaining inside the blades will continue to fall and hit the hub, causing damage to the hub. Therefore, in order to avoid the above risks, it is necessary to install a blade root baffle at the root of the blade to prevent debris from falling on the hub and ensure the safety of the hub. The blade root baffle can also effectively prevent the deformation and shrinkage of the blade root. In the existing production process, the blade root baffle is installed in the latter stage of the mold closing process, that is, the windward side and the leeward side of the blade are molded and the inner wall of the mold seam is strengthened. After multiple layers of fiberglass cloth are hand-laid up, the blade root baffle is installed to avoid the inability to achieve hand-laid up reinforcement after the baffle and the inner wall of the mold seam area are matched; and the blade root baffle is installed after demoulding. When demoulding, the blade root has no support and is prone to deformation.

[0003] In recent years, the wind power industry has developed rapidly. The size of blades has shown a trend of getting longer and longer, and the diameter of the blade root has continued to increase. The weight of the blade root baffle has increased accordingly, which has greatly increased the difficulty and danger of personnel installation and reduced installation accuracy. The increase in the weight of the blade root has also made the deformation of the blade root more obvious, seriously affecting the roundness of the blade root and the installation of the blade on the whole machine.

[0004] In a patent with application publication number CN117605628A and invention name "A wind turbine blade root baffle and manufacturing method", a wind turbine blade root baffle is disclosed, the baffle includes a first baffle, a second baffle and an intermediate baffle, the first baffle and the second baffle are respectively fixed to the inner wall of the leeward side and the inner wall of the windward side of the blade, there is a gap between the first baffle and the second baffle after mold closing, the intermediate baffle covers the gap, the first baffle, the second baffle and the intermediate baffle are combined to form a complete baffle and seal the blade root.

[0005] The split setting of the blade root baffle in the above technical scheme can reduce the weight and installation difficulty of the blade root baffle to a certain extent, but the blade root baffle needs to be divided into two arched baffles (the first baffle and the second baffle) and a long strip baffle with arcs at both ends (the middle baffle) in advance. The two arched baffles are respectively installed on the inner wall of the root of the windward side of the blade and the inner wall of the root of the leeward side of the blade. The mold closing after installation can avoid the mold seam, and the mold seam can be hand-laminated to strengthen the mold seam, but the installation workload increases, the installation accuracy is high, and it is difficult to ensure that the installation positions of the two arched plates match exactly. After the two arched baffles are connected through the long strip baffle, steps are easily generated, so that the three baffles are not on the same plane, and the force is uneven, thereby affecting the quality of the blade; and the blade root baffle is divided into three. If they are not on the same plane, they cannot play the due supporting role for the root of the windward side of the blade and the root of the leeward side of the blade, and cannot prevent the blade root from shrinking and deforming. Summary of the invention

[0006] In order to solve the above-mentioned technical problems of difficult installation, low safety and blade root shrinkage and deformation, the present invention provides a wind turbine blade root baffle and an installation and positioning device and an installation method thereof.

[0007] The objective of the present invention is achieved by adopting the following technical solutions. According to the present invention, a wind turbine blade root baffle includes a main baffle, one end of the main baffle matches the inner wall of the windward blade root, and the other end matches the inner wall of the leeward blade root, and both sides of the main baffle are provided with notches that avoid the mold seam area after the main baffle is installed in the blade root, and the notch of the main baffle is reinforced in the mold seam area and a splicing block is set to form a complete baffle.

[0008] Furthermore, a manhole is provided near the upper end and the lower end of the main baffle.

[0009] Furthermore, the shape of the bottom of the notch is L-shaped, and the arc length of one end of the main baffle is greater than the arc length of the other end.

[0010] Compared with the prior art, the present invention is beneficial in that:

[0011] Splicing blocks are set on the left and right sides of the baffle to reserve space for hand lay-up operation after the blade is molded. The splicing blocks are installed after the hand lay-up operation, which greatly reduces the difficulty and operational risk of the overall installation of the baffle. The main baffle is installed before mold closing. When the mold is closed, the main baffle is supported between the inner wall of the windward blade root and the inner wall of the leeward blade root, which can effectively prevent the blade root from shrinking and deforming, ensure the roundness of the blade root, and improve the quality of the blade.

[0012] A device for installing and positioning a blade root baffle of a wind turbine blade comprises a connecting rod, one end of which is provided with a positioning component for clamping on a flange mold on the outer side of the blade root and making the connecting rod perpendicular to the flange mold, and the other end of which is provided with a locking component for clamping on the edge of a main baffle so that the main baffle is parallel to the flange mold and can lock the main baffle.

[0013] Furthermore, the connecting rod is a square tube, and two short square tubes distributed in the length direction of the connecting rod are fixed on the side surface of one end thereof, forming a positioning component that is U-shaped as a whole.

[0014] Furthermore, the locking assembly includes a U-shaped plate, a screw, a handle, and a gasket. The bottom of the U-shaped plate is arranged on the side of the connecting tube. One of the side plates of the U-shaped plate is threadedly connected to the screw. The screw vertically penetrates the side plate of the U-shaped plate. The end of the screw located on the inner side of the U-shaped plate is provided with a gasket perpendicular to the screw. The end of the screw located on the outer side of the U-shaped plate is provided with a handle.

[0015] Compared with the prior art, the present invention is beneficial in that:

[0016] The installation and positioning device is simple to manufacture and has low processing cost. In the half-piece mold closing process, before the mold is closed, the installation and positioning device of the present invention is used to ensure that the position and angle of the blade baffle installation meet the requirements, thereby improving the installation accuracy.

[0017] A method for installing a wind turbine blade root baffle comprises the following steps:

[0018] Before the first surface of the blade and the second surface of the blade are molded together, the inner wall of the root of the first surface of the blade is scraped with adhesive at the baffle installation position required by the process parameters;

[0019] Lift the main baffle to the inside of the root of the first surface of the blade and place it above the adhesive;

[0020] Using the installation positioning device for assistance, the positioning assembly is installed on the flange mold of the blade root on the first side of the blade, and the locking assembly is sleeved on the main baffle to limit the main baffle;

[0021] Lower the main baffle until it fits against the inner wall of the root of the first surface of the blade and adheres it with the adhesive;

[0022] Lock the main baffle with the locking assembly;

[0023] Use an inclinometer to verify the angle of the main baffle. Once it is accurate, fix the main baffle and the first surface of the blade by hand-pasting fiberglass cloth between the two side surfaces of the main baffle close to the inner wall of the root of the first surface of the blade and the inner wall of the root of the first surface of the blade near the main baffle;

[0024] After the adhesive on the inner wall at the root of the first surface of the blade is cured, the main baffle is installed and fixed to the first surface of the blade, and the adhesive is scraped and applied to the position where the inner wall at the root of the second surface of the blade is opposite to the inner wall at the root of the first surface of the blade;

[0025] The mold of the first side of the blade is turned over to bond the two halves together, and the main baffle is bonded to the inner wall of the root of the second side of the blade at the same time. The main baffle and the second side of the blade are fixed by hand-laid fiberglass cloth between the two side surfaces of the main baffle close to the inner wall of the root of the second side of the blade and the inner wall of the root of the second side of the blade near the main baffle. After the adhesive on the inner wall of the root of the second side of the blade is cured, the main baffle and the second side of the blade are installed and fixed;

[0026] After the first surface of the blade and the second surface of the blade are bonded, a hand lay-up reinforcement operation is performed at the mold seam position;

[0027] After the blades are demoulded, adhesive is used to fix the splicing blocks to the notches on the left and right sides of the main baffle, and hand-laid fiberglass cloth is used to reinforce the splicing blocks and blades on the sides of the splicing blocks close to the inner wall of the corresponding blade root and the inner wall of the blade root near the splicing blocks.

[0028] Compared with the prior art, the present invention is beneficial in that:

[0029] By installing the main baffle plate in this way, the weight of the baffle plate part can be reduced each time it is installed, thereby reducing the risk of installation; the main baffle plate is installed before mold closing, and when the mold is closed, the main baffle plate supports the two blades at the same time to prevent the blades from deforming.

[0030] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of an embodiment of a wind turbine blade root baffle of the present invention;

[0032] Figure 2 It is a three-dimensional schematic diagram of an embodiment of a wind turbine blade root baffle installation and positioning device of the present invention;

[0033] Figure 3 for Figure 2 An enlarged schematic diagram of the middle locking assembly;

[0034] Figure 4 for Figure 2 A top view of

[0035] Figure 5 for Figure 4 An enlarged schematic diagram of the middle locking assembly;

[0036] Figure 6 for Figure 2 Side view of

[0037] Figure 7 for Figure 6 An enlarged schematic diagram of the middle locking assembly;

[0038] Figure 8 A schematic diagram of a wind turbine blade root baffle installation and positioning device for installing and positioning a wind turbine blade root baffle.

[0039] [Reference Signs]

[0040] 1-main baffle, 11-first arched plate, 12-second arched plate, 13-connecting plate, 14-manhole, 15-notch,

[0041] 2-Joining blocks,

[0042] 3-positioning assembly, 31-short square tube,

[0043] 4- Connecting rod,

[0044] 5-locking assembly, 51-U-shaped plate, 52-screw, 53-plum handle, 54-gasket,

[0045] 6-Flange mold. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] An embodiment of a wind turbine blade root baffle according to the present invention is as follows: Figure 1As shown, the baffle includes a main baffle 1 and a splicing block 2. The blade usually includes two surfaces, namely a first surface and a second surface. In this embodiment, the first surface is the windward surface and the second surface is the leeward surface. In other embodiments, the first surface may also be the leeward surface and the second surface may be the windward surface. The baffle is described with the portion that cooperates with the inner wall of the root of the windward surface of the blade as the upper end and the portion that cooperates with the root of the leeward surface of the blade as the lower end. The upper end of the main baffle 1 is a first arched plate 11 that cooperates with the inner wall of the root of the windward surface of the blade, and the lower end is a second arched plate 12 that cooperates with the inner wall of the root of the leeward surface of the blade. The first arched plate 11 and the second arched plate 12 are integrally connected by a connecting plate 13. The main baffle 1 is provided with notches 15 on both sides. The first arched plate 11 of the main baffle 1 is first installed on the inner wall of the root of the windward side of the blade, and then the second arched plate 12 is installed on the inner wall of the root of the leeward side of the blade through mold closing. The notches 15 can avoid the mold seam and the surrounding area, thereby avoiding the impact of the subsequent hand-layup strengthening operation in the mold seam area, ensuring that the strength of the wind turbine blade meets the requirements. After the hand-layup strengthening operation is performed on the mold seam area, the splicing block 2 is added at the notch 15 and bonded and fixed to form a complete baffle with the main baffle 1.

[0048] In this embodiment, a manhole 14 is provided near the upper end and the lower end of the main baffle 1, so that workers can enter the interior of the wind turbine blade to perform operations through the manhole 14, regardless of whether the windward side or the leeward side of the blade is placed on the ground. The two manholes 14 are arranged obliquely, so that the manholes 14 are kept at a certain distance and are not too close to the edge to avoid damaging the overall strength of the main baffle 1.

[0049] In this embodiment, the outer contour of the main baffle 1 is bilaterally symmetrical, and the two manholes 14 are centrally symmetrical, so that the main baffle 1 can be easily kept vertically stable when being hoisted to the root of the windward surface of the blade by a hoisting tool such as an overhead crane.

[0050] In this embodiment, the shape of the bottom of the notch 15 is L-shaped, and the arc length of the first arch plate 11 is greater than the arc length of the second arch plate 12. The two ends of the second arch plate 12 are flush with the corresponding bottom of the notch 15. The notch 15 is located on one side of the two ends of the first arch plate 11, so that the center of gravity of the main baffle 1 is biased toward the first arch plate 11. When the main baffle 1 is hoisted into the root of the windward surface of the blade using a crane or other hoisting tool, the first arch plate 11 is at the bottom, which is convenient for stably hoisting the main baffle 1 into the root of the windward surface of the blade and positioning it; at the same time, when the splicing block 2 is nested in the notch 15, it only needs to be bonded and fixed to the main baffle 1 through two surfaces.

[0051] The position and width of the notch 15 in the vertical direction are determined according to the position of the mold seam and the width of the hand lay-up reinforcement area, as long as the width of the notch 15 is greater than and covers the width of the hand lay-up reinforcement area of ​​the mold seam. Therefore, in other embodiments, the notch 15 can also be other shapes, for example, the notch 15 can be a U-shaped notch with an opening toward the mold seam and symmetrical with the mold seam as the axis, and correspondingly, the shape of the splicing block 2 matches the notch 15.

[0052] Splicing blocks are set on the left and right sides of the baffle to reserve space for hand lay-up operation after the blade is molded. The splicing blocks are installed after the hand lay-up operation, which greatly reduces the difficulty and operational risk of the overall installation of the baffle. The main baffle is installed before mold closing. When the mold is closed, the main baffle is supported between the inner wall of the windward blade root and the inner wall of the leeward blade root, which can effectively prevent the blade root from shrinking and deforming, ensure the roundness of the blade root, and improve the quality of the blade.

[0053] In other embodiments, the main baffle plate 1 may be installed on the leeward side of the blade first, and then the first arch plate 11 may be matched with the inner wall of the leeward blade root. After the main baffle plate 1 is fixed to the leeward side of the blade, the second arch plate 12 may be matched and fixed to the inner wall of the windward blade root.

[0054] An embodiment of a wind turbine blade root baffle installation and positioning device according to the present invention is as follows: Figures 2 to 7 As shown, the device includes a positioning component 3, a connecting rod 4, and a locking component 5. The blade generally includes two surfaces, namely, a first surface and a second surface. In this embodiment, the first surface is the windward surface and the second surface is the leeward surface. In other embodiments, the first surface may also be the leeward surface and the second surface may be the windward surface. In this embodiment, the connecting rod 4 is a square tube, and two short square tubes 31 distributed in the length direction of the connecting rod 4 are fixed on the side of one end thereof to form a positioning component 3 that is U-shaped as a whole. The U-shaped interface size of the positioning component 3 (i.e., the spacing between the two short square tubes 31) matches the thickness of the flange mold 6. The flange mold 6 is arranged on the outside of the end of the windward blade root and matches the shape of the blade root end face. An circumferentially distributed embedded bolt sleeves need to be arranged at the end of the blade root. The positioning of the embedded bolt sleeves is achieved by the semicircular flange mold 6. The positioning component 3 can be clamped on the straight edge of the flange mold 6 and can slide. The flange mold 6 is a prior art and will not be described here. The spacing between the two short square tubes 31 of the positioning component 3 matches the thickness of the flange mold 6 , so that the interface of the positioning component 3 matches the flange mold. After the positioning component 3 is clamped on the flange mold 6 , the connecting rod 4 is perpendicular to the flange mold 6 .

[0055] The locking assembly 5 is arranged on the side of the other end of the connecting pipe 4, and the angle between the side where the locking assembly 5 is located and the side where the positioning assembly 3 is located is 90°. The locking assembly 5 includes a U-shaped plate 51, a screw 52, ​​a plum handle 53, and a gasket 54. The bottom of the U-shaped plate 51 is arranged on the side of the connecting pipe 4. One side plate of the U-shaped plate 51 is provided with a threaded hole, and the threaded hole is threadedly connected to the screw 52. The screw 52 vertically penetrates the side plate of the U-shaped plate. The end of the screw 52 located on the inner side of the U-shaped plate 51 is provided with a gasket 54 perpendicular to the screw 52, ​​and the end of the screw 52 located on the outer side of the U-shaped plate is provided with a plum handle 53. The shape of the gasket 54 is circular or square or other shapes. The length of the connecting rod 4 matches the spacing between the flange mold 6 and the blade root baffle. After the positioning assembly 3 is matched with the flange mold 6, the width range of the blade root baffle can fall within the width range of the U-shaped plate 51. Select a matching installation and positioning device according to the model of the blade. Since the opening of the U-shaped plate 51 faces one side, when the positioning device is installed on the flange mold 6, it is necessary to ensure that the opening of the U-shaped plate 51 faces the straight edge of the notch on the main baffle 1. The straight edge of the flange mold 6 is flush with the windward blade root mold seam, and the straight edges extending left and right of the notch 15 are located below the plane where the mold seam is located. After the positioning component 3 is installed on the blade mold 6, the locking component 5 is fixed on the straight edge extending vertically from the notch 15, so that the main baffle 1 is vertically set inside the windward blade root. After the mold is closed, the main baffle 1 is vertically set inside the blade root, and the supporting effect is better.

[0056] The main baffle plate 1 is hoisted into the root of the windward surface of the blade and the first arch plate 11 is lowered to fit as close as possible to the inner wall of the root of the windward surface of the blade. Then, the installation and positioning device of the baffle plate is installed on the flange mold 6, so that the positioning component 3 cooperates with the flange mold 6, and the opening of the U-shaped plate 51 of the locking component 5 faces the straight edge vertically extending from the notch of the main baffle plate 1, and the U-shaped plate 51 is clamped on the straight edge vertically extending from the notch of the main baffle plate 1, and the connecting rod 4 is perpendicular to the flange mold 6; then, the plum blossom handle 53 is screwed to make the gasket 54 push the main baffle plate 1 so that the main baffle plate 1 is close to the other side plate of the U-shaped plate 51. If the main baffle plate 1 deviates at a certain angle on the horizontal plane, the main baffle plate 1 can be corrected to make the main baffle plate 1 parallel to the flange mold 6, and then make the main baffle plate 1 parallel to the end face of the blade root to ensure installation The angle is correct. At this time, the gasket 54 and the U-shaped plate 51 do not clamp the main baffle 1; the main baffle 1 continues to descend under the limit of the locking assembly 5 and fits with the adhesive scraped on the inner wall of the root of the windward side of the blade; then tighten the plum blossom handle 53 to lock the main baffle 1 to prevent the main baffle 1 from shaking, and then use the inclinometer to verify the angle of the main baffle 1. After it is accurate, the main baffle 1 and the root of the windward side of the blade are fixed by hand-pasted fiberglass cloth between the two side surfaces of the main baffle 1 close to the inner wall of the root of the windward side of the blade and the inner wall of the root of the windward side of the blade near the main baffle. During the fixing process, the main baffle 1 can be prevented from shaking by installing a positioning device to avoid deviation of the fixed position. After the adhesive is cured, the main baffle 1 and the root of the windward side of the blade are installed and fixed before mold closing (the front stage of the half-piece mold closing process).

[0057] The installation and positioning device is simple to manufacture and has low processing cost. In the front stage of the half-piece mold closing process, before the mold is closed, the installation and positioning device of the present invention is used to ensure that the position and angle of the blade baffle installation meet the requirements and improve the installation accuracy.

[0058] In other embodiments, the cross-section of the connecting rod 4 may also be other shapes. For example, the connecting rod 4 may be made of angle steel, U-shaped steel, round steel, etc., as long as the interface of the locking component 5 and the interface of the positioning component 3 are oriented at 90°.

[0059] In other embodiments, the locking assembly 5 may also adopt other forms of clamping devices.

[0060] In other embodiments, the positioning assembly may adopt a structure such as a U-shaped plate.

[0061] In other embodiments, the plum blossom handle may also be replaced by a handle of other shapes such as a cross handle.

[0062] An embodiment of a method for installing a wind turbine blade root baffle of the present invention comprises the following steps:

[0063] (1) Before the windward side and the leeward side of the blade are molded together, the inner wall of the root of the windward side of the blade is marked with a line according to the baffle installation position required by the process parameters, and a certain thickness of adhesive is scraped on the marked position;

[0064] (2) Use a crane or other lifting tool to lift the main baffle 1 to the inside of the root of the windward side of the blade and place it above the adhesive;

[0065] (3) Using the installation positioning device to assist, install the positioning assembly 3 on the flange mold 6 of the blade root, and put the locking assembly 5 on the main baffle 1 to limit the main baffle 1 to prevent the main baffle 1 from tilting and ensure the correct installation angle;

[0066] (4) Lower the main baffle 1 until it fits against the inner wall of the root of the windward side of the blade and bond it with the adhesive;

[0067] (5) Lock the main baffle 1 with the locking assembly 5 to prevent shaking;

[0068] (6) After locking the main baffle 1, use an inclinometer to verify the angle of the main baffle 1. When it is accurate, fix the main baffle 1 and the windward surface of the blade by hand-pasting fiberglass cloth between the two side surfaces of the main baffle 1 close to the inner wall of the root of the windward surface of the blade and the inner wall of the root of the windward surface of the blade near the main baffle;

[0069] (7) After the adhesive on the inner wall of the root of the windward side of the blade is cured, the main baffle 1 is installed and fixed to the windward side of the blade, and the adhesive is scraped and applied to the position where the inner wall of the root of the leeward side of the blade is opposite to the inner wall of the root of the windward side of the blade;

[0070] (8) Flip the mold of the windward side of the blade, so that the windward side and the leeward side of the blade are bonded together, and at the same time, the main baffle 1 is bonded to the inner wall of the leeward blade root, and the main baffle 1 and the leeward side of the blade are fixed by hand-laid fiberglass cloth between the two side surfaces of the main baffle 1 close to the inner wall of the leeward root of the blade and the inner wall of the leeward root of the blade near the main baffle. After the adhesive on the inner wall of the leeward root of the blade is cured, the main baffle 1 and the leeward side of the blade are installed and fixed;

[0071] (9) After the windward side and the leeward side of the blade are bonded, a hand-layup strengthening operation is performed at the mold seam position to strengthen the fixing strength of the windward side and the leeward side of the blade;

[0072] (10) After the blade is demoulded, it can be transferred to the post-processing workshop, where the splicing block 2 is fixedly bonded to the notches on the left and right sides of the main baffle 1 using an adhesive, and the splicing block 2 and the blade are reinforced by hand-pasting glass fiber cloth on the side of the splicing block 2 close to the inner wall of the corresponding blade root and the inner wall of the blade root near the splicing block, thereby achieving the installation and fixation of the baffle and the blade.

[0073] In actual operation, the above steps can be adjusted as needed, as long as the installation of the baffle can ensure safety and ease of operation and prevent deformation of the blade root.

[0074] The blade usually includes two surfaces, namely a first surface and a second surface. In this embodiment, the first surface is the windward surface and the second surface is the leeward surface. In other embodiments, the first surface may also be the leeward surface and the second surface may be the windward surface.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A wind turbine blade root baffle, characterized in that: It includes a main baffle, one end of which matches the inner wall of the windward blade root and the other end matches the inner wall of the leeward blade root. Notches are provided on both sides of the main baffle to avoid the mold seam area after the main baffle is installed in the blade root. The notch of the main baffle is reinforced in the mold seam area and a splicing block is set to form a complete baffle.

2. A wind turbine blade root baffle according to claim 1, characterized in that: A manhole is respectively arranged near the upper end and the lower end of the main baffle.

3. The wind turbine blade root baffle according to claim 1, characterized in that: The shape of the bottom of the notch is L-shaped, and the arc length of one end of the main baffle is greater than the arc length of the other end.

4. A device for installing and positioning a blade root baffle of a wind turbine blade, comprising a connecting rod, characterized in that: One end of the connecting rod is provided with a positioning component for clamping on the flange mold outside the blade root and making the connecting rod perpendicular to the flange mold, and the other end is provided with a locking component for clamping on the edge of the main baffle so that the main baffle is parallel to the flange mold and can lock the main baffle.

5. The installation and positioning device for a wind turbine blade root baffle according to claim 1, characterized in that: The connecting rod is a square tube, and two short square tubes distributed in the length direction of the connecting rod are fixed on the side surface of one end thereof to form a positioning component that is U-shaped as a whole.

6. The installation and positioning device for a wind turbine blade root baffle according to claim 1, characterized in that: The locking assembly includes a U-shaped plate, a screw, a handle, and a gasket. The bottom of the U-shaped plate is arranged on the side of the connecting pipe. One of the side plates of the U-shaped plate is threadedly connected to the screw. The screw vertically penetrates the side plate of the U-shaped plate. The end of the screw located on the inner side of the U-shaped plate is provided with a gasket perpendicular to the screw. The end of the screw located on the outer side of the U-shaped plate is provided with a handle.

7. A method for installing a wind turbine blade root baffle, characterized in that: The following steps are involved: Before the first surface of the blade and the second surface of the blade are molded together, the inner wall of the root of the first surface of the blade is scraped with adhesive at the baffle installation position required by the process parameters; Lift the main baffle to the inside of the root of the first surface of the blade and place it above the adhesive; Using the installation positioning device for assistance, the positioning assembly is installed on the flange mold of the blade root on the first side of the blade, and the locking assembly is sleeved on the main baffle to limit the main baffle; Lower the main baffle until it fits against the inner wall of the root of the first surface of the blade and adheres it with the adhesive; Lock the main baffle with the locking assembly; Use an inclinometer to verify the angle of the main baffle. Once it is accurate, fix the main baffle and the first surface of the blade by hand-pasting fiberglass cloth between the two side surfaces of the main baffle close to the inner wall of the root of the first surface of the blade and the inner wall of the root of the first surface of the blade near the main baffle; After the adhesive on the inner wall at the root of the first surface of the blade is cured, the main baffle is installed and fixed to the first surface of the blade, and the adhesive is scraped and applied to the position where the inner wall at the root of the second surface of the blade is opposite to the inner wall at the root of the first surface of the blade; The mold of the first side of the blade is turned over to bond the two halves together, and the main baffle is bonded to the inner wall of the root of the second side of the blade at the same time. The main baffle and the second side of the blade are fixed by hand-laid fiberglass cloth between the two side surfaces of the main baffle close to the inner wall of the root of the second side of the blade and the inner wall of the root of the second side of the blade near the main baffle. After the adhesive on the inner wall of the root of the second side of the blade is cured, the main baffle and the second side of the blade are installed and fixed; After the first surface of the blade and the second surface of the blade are bonded, a hand lay-up reinforcement operation is performed at the mold seam position; After the blades are demoulded, adhesive is used to fix the splicing blocks to the notches on the left and right sides of the main baffle, and hand-laid fiberglass cloth is used to reinforce the splicing blocks and blades on the sides of the splicing blocks close to the inner wall of the corresponding blade root and the inner wall of the blade root near the splicing blocks.

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