Wind power blade root baffle and mounting and positioning device

Abstract

The utility model belongs to the technical field of wind power blade production and manufacturing, and particularly relates to a wind power blade root baffle and a mounting and positioning device thereof. 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. By installing the main baffle plate, the weight of the baffle plate installation part each time can be reduced, and the installation risk is further 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 utility model belongs to the technical field of wind turbine blade production and manufacturing, and particularly relates to a root baffle and an installation positioning device for a wind turbine blade. Background Art

[0002] Wind energy is an environmentally friendly renewable energy source with good development prospects and is an important part of the future energy structure. Wind turbine blades are the core components for converting wind energy into electrical energy and are also the main basis for measuring the design and process reliability of wind turbines. The quality of the blades directly affects the service life of the turbines. Generally, there are three wind turbine blades, which are installed on the pitch bearing of the whole machine through root bolts. During operation, the blades will deform, and the residual adhesive residues inside the blades will continuously fall and hit the hub, causing damage to the hub. Therefore, in order to avoid the above risks, it is necessary to install a root baffle at the blade root to prevent debris from falling on the hub and ensure the safety of the hub. The root baffle can also effectively prevent the problem of root deformation and shrinkage. In the existing production process, the root baffle is installed in the later-stage mold closing process, that is, after the windward side and the leeward side of the blade are mold closed and the inner wall of the mold joint is strengthened, multiple layers of fiberglass cloth are hand-laid and then the root baffle is installed to avoid the inability to hand-lay and strengthen after the baffle is fitted with the inner wall of the area where the mold joint is located; and the root baffle is installed after demolding. When demolding, there is no support at the blade root, and the blade root is prone to deformation.

[0003] In recent years, the wind power industry has developed rapidly, and the size of the blades has shown a trend of getting longer and the root diameter is constantly increasing. The self-weight of the root baffle increases accordingly, and the operation difficulty and danger during installation by personnel will increase significantly, and the installation accuracy will decrease. The increase in the self-weight of the blade root also makes the problem of root deformation more obvious, seriously affecting the roundness of the blade root and the installation of the blade on the whole machine.

[0004] In the patent with the application publication number CN117605628A and the utility model creation name of a root baffle for a wind turbine blade and a manufacturing method, a root baffle for a wind turbine blade 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 walls of the leeward side and the windward side of the blade. There is a gap between the first baffle and the second baffle after mold closing, and the intermediate baffle covers the gap. The first baffle, the second baffle and the intermediate baffle are combined to form a complete baffle and block the blade root.

[0005] The root baffle in the above technical solution is separately provided, which can reduce the weight and installation difficulty of the root baffle to a certain extent during installation. However, it is necessary to divide the root baffle into two bow-shaped baffles (the first baffle and the second baffle) and a long strip baffle with arc-shaped ends at both ends (the middle baffle) in advance. The two bow-shaped 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. After installation, the mold can be closed to avoid the mold joint, and the hand lay-up reinforcement of the mold joint can be carried out. However, installing the two bow-shaped plates separately increases the installation workload, requires high installation accuracy, and it is difficult to ensure that the installation positions of the two bow-shaped plates exactly match. After the two bow-shaped baffles are butted through the long strip baffle, steps are likely to occur, causing the three baffles not to be in the same plane and the force to be uneven, thus affecting the quality of the blade; and if the root baffle is divided into three parts and not in the same plane, it 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 root from shrinking and deforming. Utility Model Content

[0006] To solve the above technical problems of difficult installation, low safety, and root shrinkage and deformation of the blade, the present utility model provides a root baffle and an installation positioning device for a wind power blade.

[0007] The purpose of the present utility model is achieved by adopting the following technical solutions. A root baffle for a wind power blade according to the present utility model includes a main baffle. One end of the main baffle matches the inner wall of the root of the windward side, and the other end matches the inner wall of the root of the leeward side. Notches are provided on both sides of the main baffle to avoid the mold joint area after the main baffle is installed in the root. After the mold joint area of the main baffle is strengthened, splicing blocks are provided to form a complete baffle.

[0008] Further, a manhole is provided at each position near the upper end and the lower end of the main baffle.

[0009] Further, 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 that of the other end.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] Splicing blocks are provided on both the left and right sides of the baffle, reserving the space for hand lay-up operation after the blade mold is closed. After the hand lay-up operation, the splicing blocks are installed, greatly reducing the installation difficulty and operation risk during the overall installation of the baffle; before the mold is closed, the main baffle is installed. During mold closing, the main baffle is supported between the inner wall of the root of the windward side and the inner wall of the root of the leeward side of the blade, which can effectively prevent the root from shrinking and deforming, ensure the roundness of the root, and improve the quality of the blade.

[0012] An installation and positioning device for the root baffle of a wind turbine blade, comprising a connecting rod. One end of the connecting rod is provided with a positioning component for sleeving 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 sleeving on the edge of the main baffle to make the main baffle parallel to the flange mold and capable of locking the main baffle.

[0013] Further, 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 of the connecting rod to form a U-shaped positioning component as a whole.

[0014] Further, the locking component includes a U-shaped plate, a screw rod, a handle, and a gasket. The bottom of the U-shaped plate is arranged on the side surface of the connecting pipe. One side plate of the U-shaped plate is threadedly connected with the screw rod. The screw rod vertically penetrates the side plate of the U-shaped plate. A gasket perpendicular to the screw rod is provided at the end of the screw rod inside the U-shaped plate, and a handle is provided at the end of the screw rod outside the U-shaped plate.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] This installation and positioning device is simple to manufacture and has a low processing cost; in the semi-piece mold closing process, when the mold has not been closed yet, using the installation and positioning device of the present utility model can ensure that the installation position and angle of the blade baffle meet the requirements and improve the installation accuracy.

[0017] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, is described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an embodiment of the root baffle of a wind turbine blade of the present utility model;

[0019] Figure 2 It is a three-dimensional schematic diagram of an embodiment of the installation and positioning device for the root baffle of a wind turbine blade of the present utility model;

[0020] Figure 3 For Figure 2 The enlarged schematic diagram of the locking component in

[0021] Figure 4 For Figure 2 The top view of

[0022] Figure 5 For Figure 4 The enlarged schematic diagram of the locking component in

[0023] Figure 6 For Figure 2Side view;

[0024] Figure 7 is Figure 6 an enlarged schematic view of the locking assembly in

[0025] Figure 8 a schematic diagram of the installation and positioning of the root baffle of a wind turbine blade by the installation and positioning device for the root baffle of a wind turbine blade.

[0026]

Reference numerals

[0027] 1 - Main baffle, 11 - First arcuate plate, 12 - Second arcuate plate, 13 - Connecting plate, 14 - Manhole, 15 - Notch,

[0028] 2 - Splicing block,

[0029] 3 - Positioning assembly, 31 - Short square pipe,

[0030] 4 - Connecting rod,

[0031] 5 - Locking assembly, 51 - U - shaped plate, 52 - Screw, 53 - Plum blossom handle, 54 - Gasket,

[0032] 6 - Flange mold. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0034] An embodiment of a root baffle of a wind turbine blade of the present utility model, as Figure 1As shown in the figure, the baffle includes a main baffle 1 and a splicing block 2. The blade generally includes two surfaces, namely the first surface and the second surface. In this embodiment, taking the first surface as the windward surface and the second surface as the leeward surface as an example for illustration, in other embodiments, the first surface can also be the leeward surface and the second surface can be the windward surface. The baffle is described with the part that cooperates with the inner wall of the root of the windward surface of the blade as the upper end and the part that cooperates with the root of the leeward surface of the blade as the lower end. The upper end part of the main baffle 1 is a first arcuate plate 11 that cooperates with the inner wall of the root of the windward surface of the blade, and the lower end part is a second arcuate plate 12 that cooperates with the inner wall of the root of the leeward surface of the blade. The first arcuate plate 11 and the second arcuate plate 12 are integrally connected by a connecting plate 13. There are notches 15 on both the left and right sides of the main baffle 1. First, install the first arcuate plate 11 of the main baffle 1 on the inner wall of the root of the windward surface of the blade, and then install the second arcuate plate 12 on the inner wall of the root of the leeward surface of the blade through mold closing. The notches 15 can avoid the mold closing seam and the nearby area, thereby avoiding affecting the subsequent hand lay-up strengthening operation in the mold closing seam area and ensuring that the strength of the wind power blade meets the requirements. After the hand lay-up strengthening operation is carried out on the mold closing seam area, the splicing block 2 is filled and adhesively fixed at the notches 15 to form a complete baffle with the main baffle 1.

[0035] In this embodiment, a manhole 14 is provided at each of the positions near the upper end and the lower end of the main baffle 1, so that no matter whether the windward surface or the leeward surface of the blade is placed on the ground, the staff can enter the inside of the wind power blade through the manhole 14 for operation. The two manholes 14 are inclined to keep a certain distance between the manholes 14 and ensure that the distance from the edge is not too close to avoid damaging the overall strength of the main baffle 1.

[0036] In this embodiment, the outer contour shape of the main baffle 1 is symmetrically arranged left and right, and the centers of the two manholes 14 are symmetrically arranged, which is convenient for the main baffle 1 to be kept vertical and stable when hoisted to the inside of the root of the windward surface of the blade by a lifting tool such as a crane.

[0037] In this embodiment, the shape of the bottom of the notch 15 is L-shaped, and the arc length of the first arcuate plate 11 is greater than the arc length of the second arcuate plate 12. The two ends of the second arcuate 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 arcuate plate 11, so that the center of gravity of the main baffle 1 is biased towards the first arcuate plate 11. When using a lifting tool such as a crane to hoist the main baffle 1 into the inside of the root of the windward surface of the blade, the first arcuate plate 11 is at the lower part, which is convenient for stably hoisting the main baffle 1 into the inside of 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 adhesively fixed to the main baffle 1 through two surfaces.

[0038] The position and width of the notch 15 in the up-and-down direction are determined according to the position of the mold joint and the width of the hand lay-up strengthening area. As long as the width of the notch 15 is greater than and covers the width of the hand lay-up strengthening area of the mold joint. Therefore, in other embodiments, the notch 15 can also be of other shapes. For example, the notch 15 can be a U-shaped notch with an opening facing the mold joint and symmetric about the axis of the mold joint. Correspondingly, the shape of the splicing block 2 matches that of the notch 15.

[0039] Splicing blocks are arranged on the left and right sides of the baffle, leaving a space for hand lay-up operation after the blade is closed. The splicing blocks are installed after the hand lay-up operation, greatly reducing the installation difficulty and operation risk when the baffle is installed as a whole; the main baffle is installed before closing the mold. When closing the mold, the main baffle supports between the inner walls of the leading-edge root and the trailing-edge root of the windward side, which can effectively prevent the root from shrinking and deforming, ensure the roundness of the root, and improve the quality of the blade.

[0040] In other embodiments, the main baffle 1 can also be installed inside the trailing-edge side of the blade first. At this time, the first bow-shaped plate 11 is matched with the inner wall of the trailing-edge root. After the main baffle 1 is fixed to the trailing-edge side of the blade, the second bow-shaped plate 12 is then matched and fixed with the inner wall of the leading-edge root.

[0041] An embodiment of the installation and positioning device for the root baffle of a wind turbine blade of the present utility model is as Figures 2 to 7 shown. The device includes a positioning component 3, a connecting rod 4, and a locking component 5. A blade generally includes two surfaces, namely a first surface and a second surface. In this embodiment, taking the first surface as the windward side and the second surface as the trailing-edge side as an example for description. In other embodiments, the first surface can also be the trailing-edge side, and the second surface can be the windward side. In this embodiment, the connecting rod 4 is a square tube. Two short square tubes 31 distributed in the length direction of the connecting rod 4 are fixed to the side surface of one end of the connecting rod 4, forming a positioning component 3 with a U-shaped overall shape. The U-shaped interface dimension of the positioning component 3 (i.e., the distance between the two short square tubes 31) matches the thickness of the flange mold 6. The flange mold 6 is arranged outside the end of the leading-edge root of the blade and matches the shape of the root end face. A circumferentially distributed embedded bolt sleeve needs to be arranged at the end of the root. The positioning of the embedded bolt sleeve is realized through the semi-circular flange mold 6. The positioning component 3 can be sleeved on the straight edge of the flange mold 6 and can slide. The flange mold 6 is a prior art and will not be elaborated here. The distance 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 sleeved on the flange mold 6, the connecting rod 4 is perpendicular to the flange mold 6.

[0042] A locking assembly 5 is provided on the side of the other end of the connecting pipe 4. 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 blossom handle 53, and a gasket 54. The bottom of the U-shaped plate 51 is provided on the side of the connecting pipe 4. A threaded hole is provided in one of the side plates of the U-shaped plate 51, and the threaded hole is threadedly connected to the screw 52. The screw 52 vertically penetrates the side plate of the U-shaped plate. A gasket 54 perpendicular to the screw 52 is provided at the end of the screw 52 inside the U-shaped plate 51, and a plum blossom handle 53 is provided at the end of the screw 52 outside the U-shaped plate 51. The shape of the gasket 54 is circular, square or other shapes. The length of the connecting rod 4 matches the distance between the flange mold 6 and the blade root baffle. After the positioning assembly 3 cooperates 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 blade model. Since the opening of the U-shaped plate 51 faces one side, when installing the positioning device 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 mold joint of the blade root on the windward side. The straight edges extending left and right of the notch 15 are located below the plane where the mold joint is located. After the positioning assembly 3 is installed on the blade mold 6, the locking assembly 5 is fixed on the straight edge extending vertically of the notch 15, so that the main baffle 1 is vertically arranged inside the blade root on the windward side. After closing the mold, the main baffle 1 is vertically arranged inside the blade root, and the supporting effect is better.

[0043] Lift the main baffle 1 and hoist it into the root of the windward side of the blade, and lower the first bow-shaped plate 11 to be as close as possible to the inner wall of the root of the windward side of the blade. Then install the installation positioning device of the baffle on the flange mold 6, make the positioning component 3 cooperate with the flange mold 6, and make the opening of the U-shaped plate 51 of the locking component 5 face the straight edge where the notch of the main baffle 1 extends vertically, and make the U-shaped plate 51 sleeved on the straight edge where the notch of the main baffle 1 extends vertically. The connecting rod 4 is perpendicular to the flange mold 6. Then turn the plum blossom handle 53 to push the main baffle 1 with the gasket 54, so that the main baffle 1 approaches the other side plate of the U-shaped plate 51. If the main baffle 1 is skewed at a certain angle on the horizontal plane, the main baffle 1 can be corrected to make the main baffle 1 parallel to the flange mold 6, and further make the main baffle 1 parallel to the root end face of the blade to ensure the correct installation angle. At this time, the gasket 54 and the U-shaped plate 51 do not clamp the main baffle 1. Make the main baffle 1 continue to descend under the limit of the locking component 5 and fit with the adhesive coated 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. Then use an angle gauge to verify the angle of the main baffle 1. After it is accurate, fix the main baffle 1 and the root of the windward side of the blade by hand-laying fiberglass cloth between the two side faces 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 installation positioning device can prevent the main baffle 1 from shaking and avoid the deviation of the fixing position. After the adhesive is cured, the installation and fixation of the main baffle 1 and the root of the windward side of the blade before mold closing (the first stage of the half-piece mold closing process) are realized.

[0044] The installation positioning device is simple to manufacture and has low processing costs. In the first stage of the half-piece mold closing process, when the mold has not been closed yet, using the installation positioning device of the present utility model can ensure that the installation position and angle of the blade baffle meet the requirements and improve the installation accuracy.

[0045] In other embodiments, the cross-section of the connecting rod 4 can also be other shapes. For example, the connecting rod 4 can be made of angle steel, U-shaped steel, round steel, etc., as long as the interface directions of the locking component 5 and the positioning component 3 are 90°.

[0046] In other embodiments, the locking component 5 can also adopt other forms of clamping devices.

[0047] In other embodiments, the positioning component can adopt structures such as U-shaped plates.

[0048] In other embodiments, the plum blossom handle can also be replaced with other-shaped handles such as cross handles.

[0049] The installation process of a wind turbine blade root baffle includes the following steps:

[0050] (1) Before the mold closing of the windward side and the leeward side of the blade, draw a line on the inner wall of the root of the windward side of the blade according to the installation position of the baffle required by the process parameters, and scrape a certain thickness of adhesive at the drawn position;

[0051] (2) Use a lifting tool such as a crane to hoist the main baffle 1 into the inside of the root of the windward side of the blade and place it above the adhesive;

[0052] (3) With the assistance of an installation positioning device, install the positioning component 3 on the flange mold 6 of the blade root, put the locking component 5 on the main baffle 1, limit the main baffle 1 to prevent it from tilting, and ensure the correct installation angle;

[0053] (4) Lower the main baffle 1 until it fits the inner wall of the root of the windward side of the blade and bond it with the adhesive at the same time;

[0054] (5) Lock the main baffle 1 with the locking component 5 to prevent it from shaking;

[0055] (6) After locking the main baffle 1, use an angle gauge to verify the angle of the main baffle 1. After it is accurate, fix the main baffle 1 and the windward side of the blade by hand-laying 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;

[0056] (7) After the adhesive on the inner wall of the root of the windward side of the blade cures, the main baffle 1 is installed and fixed to the windward side of the blade. Scrape adhesive at the position on the inner wall of the root of the leeward side of the blade opposite to the inner wall of the root of the windward side of the blade;

[0057] (8) Flip the mold of the windward side of the blade to bond the two half pieces of the windward side and the leeward side of the blade. At the same time, bond the main baffle 1 to the inner wall of the root of the leeward side of the blade, and fix the main baffle 1 and the leeward side of the blade by hand-laying fiberglass cloth between the two side surfaces of the main baffle 1 close to the inner wall of the root of the leeward side of the blade and the inner wall of the root of the leeward side of the blade near the main baffle. After the adhesive on the inner wall of the root of the leeward side of the blade cures, the main baffle 1 is installed and fixed to the leeward side of the blade;

[0058] (9) After the windward side and the leeward side of the blade are bonded, carry out hand-laying strengthening operation at the mold joint position to strengthen the fixing strength between the windward side and the leeward side of the blade;

[0059] (10) After the blade is demolded, it can be transferred to the post-treatment workshop. Use adhesive to fixedly bond the splicing block 2 at the left and right notches of the main baffle 1, and reinforce the splicing block 2 and the blade by hand-laying fiberglass cloth on the side surface of the splicing block 2 close to the corresponding inner wall of the blade root and the inner wall of the blade root near the splicing block, so as to realize the installation and fixation of the baffle and the blade.

[0060] In actual operation, the above steps can be adjusted as needed, as long as it is ensured that the installation of the baffle can ensure safety and operational convenience and prevent the root of the blade from deforming.

[0061] The blade generally includes two surfaces, namely the first surface and the second surface. In this embodiment, taking the first surface as the windward surface and the second surface as the leeward surface as an example for illustration, in other embodiments, the first surface can also be the leeward surface and the second surface can be the windward surface.

[0062] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present 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 4, 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 overall U-shaped.

6. The installation and positioning device for a wind turbine blade root baffle according to claim 4, 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.

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