Anti-deformation tool and method for blade root pitch circle of wind power generation blade

Abstract

The invention discloses a wind power generation blade root pitch circle anti-deformation tool which comprises a main body circular ring and a tightening device, the tightening device can tighten the main body circular ring into a standard circular ring, and the inner diameter of the standard circular ring is matched with the outer diameter of a blade root; the main body circular ring is fixedly arranged on the outer circumferential surface of a pitch circle of a blade root through a tightening device; and the overall roundness of the blade root pitch circle of the blade is guaranteed, and matching with a hub is facilitated. The invention further provides a wind power generation blade root pitch circle anti-deformation method, the tool is installed on the peripheral face of the blade root pitch circle of the blade, and then a standard circular ring is formed to tightly hoop the outer surface of the blade root pitch circle of the blade to guarantee the overall roundness of the pitch circle. And an external reserved reinforcing area is arranged in the body circular ring to reinforce the mold closing seam at the pitch circle hooping position.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power blade tooling, and in particular to a wind power blade root pitch circle deformation prevention tooling and method. Background Art

[0002] Wind turbine blades are made of fiberglass, which has large thermal deformation. When the blades are demoulded, the deformation of the fiberglass and the weight of the blades will cause the roundness of the blade root pitch circle to deviate. According to the three-dimensional coordinate scanning of the blade root pitch circle, the deformation of the blade root pitch circle often changes from a circle to an ellipse, which makes it impossible to match the main engine hub during installation. This problem is more obvious in large blades of 100 meters. Therefore, in the prior art, an anti-deformation device is generally used to prevent the deformation of the blade root node.

[0003] Through searching, the patents that are related to the present invention mainly include the following patents: 1. The Chinese utility model patent with the authorization announcement number CN213265415U and the authorization announcement date June 18, 2020, entitled "A blade root anti-deformation tooling for wind turbine blades", discloses a blade root anti-deformation tooling for wind turbine blades, comprising: a bracket and an adjustment device connected to the bracket, the adjustment device is used to clamp the blade root of the wind turbine blade. The bracket comprises: a support ring; at least three support rods, one end of which is fixedly connected to the support ring and the other end is fixedly connected to the adjustment device; at least three connecting rods, the two ends of which are respectively fixedly connected to two adjacent support rods. The adjustment device comprises: a main structure, one end of which is fixedly connected to the support rod and the other end is a blade root accommodating portion; an adjustment mechanism, which comprises a baffle and a screw fixedly connected to the baffle, the screw is threadedly connected to the blade root accommodating portion, and the rotating screw drives the baffle to move, so that the baffle supports the blade root to prevent the blade root from deforming. The utility model improves the overall rigidity, reduces the cost, is easy to disassemble and has high reliability.

[0004] 2. The Chinese utility model patent with the authorization announcement number CN216477681U and the authorization announcement date January 5, 2022, and the name "Blade root anti-deformation tooling for wind turbine blades", discloses a blade root anti-deformation tooling for wind turbine blades, the blade root anti-deformation tooling includes a support bracket and an adjustment mechanism, the support bracket includes a support end and a plurality of abutment ends, the plurality of abutment ends are arranged on the outer peripheral side of the support bracket, the abutment end is used to abut the inner peripheral surface of the cavity at the blade root; the support bracket is connected to the adjustment mechanism, the adjustment mechanism is arranged at the support end, and the adjustment mechanism is used to adjust the distance between the abutment end and the support end. By setting a support bracket and setting an adjustment mechanism at the support end of the support bracket to adjust the distance between the abutment end and the support end of the support bracket, not only can the blade root be better supported and fixed, and the anti-deformation effect can be improved, but also the blade root anti-deformation tooling can be easily removed after the blade and the hub are installed.

[0005] However, the anti-deformation devices in the above two documents need to be placed inside the blade root pitch circle, and a supporting device is provided to support the inside of the blade root pitch circle to prevent its deformation, which is different from the technical file of the scheme of the present application. In addition, the supporting devices of the above devices are a limited number of support rods or support frames, and the single-point internal support of the blade root pitch circle cannot guarantee the overall roundness of the blade root pitch circle.

[0006] In summary, how to design a wind turbine blade root pitch circle anti-deformation tooling and method to ensure the overall roundness of the blade root is a technical problem that needs to be solved urgently. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a wind power blade root pitch circle anti-deformation tooling and method in view of the defect in the prior art that the overall roundness of the blade root pitch circle cannot be guaranteed due to blade demoulding and its own weight.

[0008] In order to solve the above technical problems, a technical solution adopted by the present invention is: a wind turbine blade root pitch circle anti-deformation tooling, which includes a main ring and a tightening device, the tightening device can tighten the main ring into a standard ring, the inner diameter of the standard ring matches the outer diameter of the blade root; the main ring is fixedly set on the outer circumferential surface of the blade root circle by the tightening device.

[0009] Furthermore, the main body ring is designed as an arc block structure, including a plurality of arc blocks, and the clamping device combines the plurality of arc blocks into a whole metal ring, the inner diameter of the metal ring is adapted to the outer diameter of the blade root pitch circle.

[0010] Furthermore, the tightening device is arranged on the outside of the ends of each two adjacent arc blocks, and the tightening device includes a connecting piece and a tightening block. The tightening block is arranged at both ends of the arc block, and the connecting piece is used to lock the tightening blocks together, thereby fixing the ends of the two adjacent arc blocks together.

[0011] The present invention also provides another technical solution: comprising a main body ring, the main body ring is an integral metal ring, the main body ring is a standard ring, the inner diameter of the standard ring matches the outer diameter of the blade root pitch circle, and the main body ring clamp is arranged on the outer peripheral surface of the blade root pitch circle.

[0012] Furthermore, a guide bevel is provided on one side edge of the inner wall of the metal ring, and the metal ring is inserted into the outer circumference of the blade root pitch circle through the guide bevel, so that the main ring clamp is provided on the outer circumference of the blade root pitch circle.

[0013] Furthermore, the main body ring is also provided with a protective layer, and the protective layer is arranged on the inner wall of the main body.

[0014] Furthermore, two external reinforcement reserved spaces are provided on the main body ring, and the two external reinforcement reserved spaces are symmetrically arranged on the inner wall of the main body ring.

[0015] The present invention also provides a method for preventing deformation of the blade root pitch circle of a wind power generation blade. When tightening the blade root pitch circle, a main body ring is first installed on the outer peripheral surface of the blade root pitch circle, and then a tightening device is used to tighten the main body ring into a standard ring that matches the outer diameter of the blade root pitch circle, thereby tightening the blade root pitch circle; The tightening device is designed to be composed of two parts: a connecting piece and a tightening block, and the main body is designed to be divided into a plurality of arc-shaped blocks; The specific tightening method at this time is: first fix a tightening block at both ends of each arc block, then install multiple arc blocks on the outer circumference of the blade root pitch circle, and then use the connecting piece to lock the tightening block so that the two adjacent arc block ends are fixed together, and then combine the multiple arc blocks into a standard circular ring that matches the blade root pitch circle, thereby tightening the blade root pitch circle to prevent deformation.

[0016] Furthermore, when the main body circular ring is designed to be segmented into a plurality of arc-shaped blocks, the locking position of the main body can be adjusted by designing the positions of the tightening blocks between adjacent arc-shaped blocks.

[0017] The present invention also provides another method for preventing the pitch circle of the blade root of a wind turbine blade from being deformed. When the main body ring is an integral metal ring, the specific method for tightening the ring is as follows: By setting a guide bevel on one edge of the inner wall of the metal ring, the side of the metal ring with the guide bevel is first inserted into the outer circumferential surface of the pitch circle of the blade root along the direction of the blade root to the blade tip, and then the main ring clamp is set on the outer circumferential surface of the pitch circle of the blade root, thereby tightening the blade root pitch circle to prevent deformation.

[0018] The beneficial effects of the present invention are: (1) By arranging the anti-deformation tooling of the present invention outside the blade root pitch circle, on the one hand, for the blade root pitch circle that has not been deformed, the trend of the blade root pitch circle changing from a circle to an ellipse can be prevented; on the other hand, the blade root pitch circle that has been deformed into an ellipse can be corrected, thereby ensuring the overall roundness of the blade root pitch circle, which is convenient for normal matching and installation with the hub in subsequent processes.

[0019] (2) The present invention divides the main circular ring into multiple arc blocks, and each arc block is locked on the outer circumferential surface of the blade root pitch circle by a tightening device, which is helpful to prevent the blade root pitch circle from deforming, especially to correct the blade root pitch circle with large deformation.

[0020] (3) The present invention divides the main circular ring into multiple arc-shaped blocks and designs the positions of the tightening blocks between adjacent arc-shaped blocks, thereby facilitating the adjustment of the locking position of the main circular ring, which is beneficial to the subsequent lifting and transfer of the blade.

[0021] (4) The present invention provides a guide bevel on one side edge of the inner wall of the metal ring, so as to facilitate the metal ring to be smoothly inserted into the outer peripheral surface of the blade root pitch circle, thereby avoiding the tooling from bumping against the blade root pitch circle and causing a poor appearance.

[0022] (5) The present invention provides an elastic protective layer on the inner wall of the main ring, thereby effectively preventing the surface of the blade root from being damaged when installing the anti-deformation tooling.

[0023] (6) The present invention provides two symmetrical external reinforcement reserved spaces on the inner wall of the main body ring, thereby facilitating the reinforcement of the blade mold seam. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention; Figure 2 for Figure 1 A partial enlarged view of B in the middle; Figure 3 It is a schematic structural diagram of the anti-deformation tooling and the blade root pitch circle matching in the first embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 5 is a schematic cross-sectional view of AA according to the second embodiment of the present invention; Figure 6 A schematic structural diagram of the anti-deformation tooling and the blade root pitch circle in the second embodiment of the present invention; In the figure: 1. main body ring, 11. arc block 1, 12. arc block 2, 13. protective layer, 14. guide bevel, 2. tightening device, 21. tightening block, 22. connecting piece, 3. external reinforcement reserved space, 4. blade root pitch circle. DETAILED DESCRIPTION

[0025] To make the purpose, technical solution and advantages of the embodiments of the invention more clear, the following will be combined with the appended drawings of the embodiments of the invention to Figure 1-6 , clearly and completely describe the technical solutions of the embodiments of the invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0026] It should be noted that all directional indications (such as up, down, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship of the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. Embodiment 1:

[0027] like Figure 1 As shown, the wind turbine blade root pitch circle anti-deformation tooling of this embodiment includes a main ring 1 and a tightening device 2. The tightening device 1 can lock the main ring 2, and the main ring 1 will be tightened into a standard ring.

[0028] like Figure 3 As shown, the inner diameter of this standard ring matches the outer diameter of the blade root pitch circle 4. When the main ring 1 is placed on the outer circumference of the blade root pitch circle 4, the main ring 1 is then locked by the clamping device 2, so that the main ring 1 is clamped on the outer circumference of the blade root pitch circle 4. The standard ring formed by the main ring 1 ensures the roundness of the blade root pitch circle. On the one hand, for the blade root pitch circle that has not been deformed, the trend of the blade root pitch circle 4 changing from a circle to an ellipse can be prevented. On the other hand, the blade root pitch circle 4 that has been deformed into an ellipse is corrected, thereby ensuring the overall roundness of the blade root pitch circle 4, which is convenient for the normal matching and installation with the hub in the subsequent process. The problem of misalignment in the subsequent installation with the main engine hub is avoided, which is not conducive to installation, and the quality of the blade product and the subsequent installation efficiency are guaranteed.

[0029] like Figure 3 As shown, in this embodiment, the main ring 1 is a metal ring, which is segmented into two identical semicircular arc blocks, which are arc block 1 11 and arc block 2 12 respectively, arc block 1 11 and arc block 2 12 are locked into a whole metal ring by a clamping device 2, the inner diameter of the metal ring is matched with the outer diameter of the blade root pitch circle 4, arc block 1 11 and arc block 2 12 are placed on the outer circumference of the blade root pitch circle 4 at a fixed position, and arc block 1 11 and arc block 2 12 are locked into a whole metal ring by the clamping device 2, thereby locking the metal ring to the outer circumference of the blade root pitch circle 4 at a fixed position. The overall roundness of the blade root pitch circle 4 is further ensured to prevent the blade root pitch circle 4 from deforming and affecting the docking installation of the blade and the hub.

[0030] like Figure 1 and Figure 2As shown, the tightening device 2 is arranged at the outside of the end of each two adjacent arc blocks, and the tightening device 2 is arranged at the outside of the end of the arc block 1 11 and the arc block 2 12. The tightening device 2 includes a connecting piece 22 and a tightening block 21. The two ends of the arc block 11 and the arc block 2 12 are both provided with a tightening block 21. The connecting piece locks the tightening block 21 of the arc block 1 11 and the tightening block 21 of the arc block 2 12 adjacent to the tightening block 21 of the arc block 1 11 together, thereby fixing the ends of the two adjacent arc blocks together. By setting the position of the tightening block between the adjacent arc blocks, the locking position of the main ring 1 is adjusted, which is conducive to the subsequent lifting and position transfer operations of the blade.

[0031] In this embodiment, the tightening block 21 is integrally formed with the arc block and is arranged on the outer circumferential surface of the two ends of each arc block. The connecting piece 22 is a bolt. Corresponding threaded through holes are provided on the two tightening blocks 21 adjacent to the arc block 11 and the arc block 2 12. The bolt passes through the corresponding threaded through holes of the two adjacent tightening blocks 21, and the two tightening blocks 21 are locked together, so that the ends of the arc block 11 and the arc block 2 12 are locked together, thereby connecting the arc block 11 and the arc block 2 12 into a standard circular ring.

[0032] It should be noted that the fastening blocks 21 of this embodiment can also be set on the outer peripheral surfaces of the two ends of each arc block by welding, bolts or other connecting methods; the connecting parts 22 can also adopt hydraulic, snap or hinge connecting parts that can perform locking functions.

[0033] like Figure 1 As shown, a protective layer 13 is also provided on the inner wall of the main ring 2. Figure 2 As shown, it can be clearly seen that the protective layer 13 is set on the inner wall of the arc block 11 and the arc block 2 12, and the protective layer 13 is made of elastic materials such as PP and PU. The purpose of this setting is that when the main ring 1 is tightening the outer circumferential surface of the blade root pitch circle 4, it is inevitable that there will be mutual friction with the outer circumferential surface of the blade root pitch circle 4. The metal inner wall directly contacts the outer circumferential surface of the blade root pitch circle 4 at the fixed position, which may damage the outer circumferential surface of the blade root pitch circle 4 and affect the appearance of the blade product. By setting a layer of elastic protective layer 13 on the inner wall of the metal ring, the adverse effect of rigid contact on the appearance of the blade is effectively avoided.

[0034] The present application also provides a method for preventing the root pitch circle of a wind turbine blade from being deformed. When using the above-mentioned tooling for preventing the root pitch circle of a wind turbine blade from being deformed, a tightening block 21 is first fixedly connected at both ends of each arc block, and then the arc block 11 and the arc block 2 12 are placed on the outer circumferential surface of the fixed position of the blade root pitch circle 4, and then bolts are sequentially passed through the threaded through holes of the two adjacent tightening blocks 21 of the arc block 11 and the arc block 2 12 to be locked, thereby fixing the adjacent ends of the arc block 11 and the arc block 2 12 into a standard circular ring and tightening it on the outer circumferential surface of the fixed position of the blade root pitch circle 4, thereby tightening the blade root pitch circle 4 to prevent it from deforming.

[0035] It should be noted that the number of the arc blocks in this embodiment may be three or more.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, two external reinforcement reserved spaces 3 are also provided on the main body ring 1, and the two external reinforcement reserved spaces 3 are symmetrically arranged on the inner wall of the main body; when the mold seam is reinforced after the anti-deformation tooling tightens the blade root pitch circle 4, the mold seam is reinforced by the two external reinforcement reserved spaces 3 symmetrically arranged in the main body. Since the blade is generally composed of two halves bonded into a whole, a mold seam will be formed at the bonding point of the two blades, and the mold seam generally requires additional reinforcement. The two external reinforcement reserved spaces 3 are arranged at the opposite positions of the main body ring so that when the anti-deformation tooling tightens the blade root pitch circle 4, it will not affect the reinforcement of the mold seam at the blade root pitch circle 4. Embodiment 2:

[0037] like Figure 4 , Figure 5 and Figure 6 As shown, different from the first embodiment, the main body ring 1 is an integral metal ring, the inner diameter of the metal ring matches the outer diameter of the blade root pitch circle, and a guide bevel 14 is provided on one side edge of the inner wall of the metal ring, and the metal ring is inserted into the outer circumference of the blade root pitch circle 4 through the guide bevel 14. The guide bevel is provided on the metal ring to smoothly insert the metal ring into the circumference of the blade root pitch circle, so as to avoid the metal ring from colliding with the periphery of the outer surface of the blade root pitch circle 4 during the insertion process, thereby damaging the appearance of the blade product.

[0038] The method for preventing the pitch circle of the blade root of a wind power generation blade of this embodiment from being deformed is as follows: when using the tool for preventing the pitch circle of the blade root of a wind power generation blade of this embodiment, the side of the metal ring provided with the guide bevel 14 is first inserted into the outer circumference of the pitch circle 4 of the blade root along the direction from the blade root to the blade tip, so that the metal main body ring 1 is tightly clamped on the outer circumference of the blade root pitch circle 4, thereby tightly clamping the blade root pitch circle 4 to prevent deformation. The overall roundness of the blade root pitch circle 4 is ensured, which is convenient for subsequent installation with the main engine hub.

[0039] The above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Technicians in the relevant technical field may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the protection scope of the present invention, and the protection scope of the present invention should be defined by the claims.

Claims

1. A wind turbine blade root pitch circle deformation prevention tool, characterized in that: It comprises a main body ring and a clamping device, wherein the clamping device can clamp the main body ring into a standard ring, the inner diameter of the standard ring matches the outer diameter of the blade root pitch circle; the main body ring is fixedly arranged on the outer peripheral surface of the blade root pitch circle by the clamping device.

2. The wind turbine blade root pitch circle deformation prevention tooling according to claim 1, characterized in that: The main body ring is designed as an arc block structure, including a plurality of arc blocks. The clamping device combines the plurality of arc blocks into a whole metal ring, and the inner diameter of the metal ring is adapted to the outer diameter of the blade root pitch circle.

3. The wind turbine blade root pitch circle deformation prevention tooling according to claim 2 is characterized by: The tightening device is arranged at the outside of the ends of each two adjacent arc blocks. The tightening device includes a connecting piece and a tightening block. The tightening block is arranged at both ends of the arc block. The connecting piece is used to lock the tightening blocks together, thereby fixing the ends of the two adjacent arc blocks together.

4. A wind turbine blade root pitch circle deformation prevention tool, characterized in that: It comprises a main body ring, which is an integral metal ring and a standard ring. The inner diameter of the standard ring matches the outer diameter of the blade root pitch circle. The main body ring clamp is arranged on the outer peripheral surface of the blade root pitch circle.

5. The wind turbine blade root pitch circle deformation prevention tooling according to claim 4 is characterized by: A guide bevel is arranged on one side edge of the inner wall of the metal ring, and the metal ring is inserted into the outer circumference of the blade root pitch circle through the guide bevel, so that the main ring clamp is arranged on the outer circumference of the blade root pitch circle.

6. The wind turbine blade root pitch circle deformation prevention tooling according to any one of claims 1 to 5, characterized in that: The main body ring is also provided with a protective layer, and the protective layer is arranged on the inner wall of the main body.

7. The method for preventing the pitch circle of a wind turbine blade root from being deformed according to claim 6, characterized in that: Two external reinforcement reserved spaces are also arranged on the main body circular ring, and the two external reinforcement reserved spaces are symmetrically arranged on the inner wall of the main body circular ring.

8. A method for preventing the pitch circle of a wind turbine blade root from being deformed, using the wind turbine blade root pitch circle deformation preventing tooling as claimed in any one of claims 1 to 3, characterized in that: When tightening the blade root pitch circle, the main body ring is first installed on the outer circumference of the blade root pitch circle, and then the main body ring is tightened into a standard ring matching the outer diameter of the blade root pitch circle by using a tightening device, thereby tightening the blade root pitch circle; The tightening device is designed to be composed of two parts: a connecting piece and a tightening block, and the main body is segmented into a plurality of arc-shaped blocks; The specific tightening method at this time is: first fix a tightening block at both ends of each arc block, then install multiple arc blocks on the outer circumference of the blade root pitch circle, and then use the connecting piece to lock the tightening block so that the two adjacent arc block ends are fixed together, and then combine the multiple arc blocks into a standard circular ring that matches the blade root pitch circle, thereby tightening the blade root pitch circle to prevent deformation.

9. The method for preventing the pitch circle of a wind turbine blade root from deforming according to claim 8, characterized in that: When the main circular ring is designed to be segmented into a plurality of arc-shaped blocks, the locking position of the main circular ring is adjusted by designing the positions of the tightening blocks between adjacent arc-shaped blocks.

10. A method for preventing the pitch circle of a wind turbine blade root from being deformed, using the wind turbine blade root pitch circle deformation preventing tooling as claimed in claim 4 or 5, characterized in that: When the main ring is an integral metal ring, the specific tightening method is: By setting a guide bevel on one edge of the inner wall of the metal ring, the side of the metal ring with the guide bevel is first inserted into the outer circumferential surface of the pitch circle of the blade root along the direction of the blade root to the blade tip, and then the main ring clamp is set on the outer circumferential surface of the pitch circle of the blade root, thereby tightening the blade root pitch circle to prevent deformation.

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