A wind power blade leading edge conformal putty scraping and shaping tool

Abstract

The present application relates to a kind of wind power blade leading edge conformal putty scraping dressing tool, including intermediate positioning rod, long positioning rod, short positioning rod, scraper, connecting rod, connecting shaft and universal wheel, long positioning rod and short positioning rod are rotatably connected with intermediate positioning rod by pin shaft;The front end of each positioning rod is provided with first long hole, the first bolt that is passed through first long hole and is locked with first nut to make connecting rod fixed on corresponding positioning rod is fixed in one end of connecting rod, the other end of connecting rod is fixed with connecting shaft, scraper is installed and limited on connecting shaft, the front end of intermediate positioning rod, long positioning rod and short positioning rod is installed with universal wheel, the rear end of a pair of long positioning rod is connected by first tension spring, the rear end of a pair of short positioning rod is connected by second tension spring.The tool of the present application can realize the adhesion blade leading edge airfoil and realize self-adaptation with airfoil change, facilitate manual operation, improve work efficiency, improve the uniformity and quality of scraped putty.

Description

Technical Field

[0001] This invention belongs to the field of non-metallic composite material processing and molding tooling technology, and specifically relates to a tooling for conformal puttying and shaping of the leading edge of a wind turbine blade. Background Technology

[0002] In the post-processing of wind turbine blades, after the leading and trailing edge reinforcement is completed, to ensure a smooth airfoil on the leading and trailing edges of the blade without fabric texture, wrinkles, or steps, putty is often applied evenly to the leading and trailing edges of the blade. This putty should completely cover the reinforcing fabric and extend 50-100mm beyond the reinforced area. The putty fills any uneven areas on either side of the leading and trailing edges. After the putty has cured, further sanding and shaping are performed. In existing processes, because the area requiring putty application on the leading edge of the wind turbine blade is relatively large, and the airfoil gradually changes from the blade root to the tip, multiple people need to use various putty scrapers to apply putty multiple times. This is not only inefficient but also often results in uneven application, increasing the difficulty of subsequent sanding and shaping and negatively impacting the quality of the leading edge airfoil. Summary of the Invention

[0003] To address the technical problems existing in the prior art, this invention provides a tooling for conforming putty application and shaping of wind turbine blade leading edge. This tooling can conform to the airfoil of the blade leading edge and adapt to changes in the airfoil. Furthermore, by contacting the wind turbine blade at multiple points, it facilitates manual operation, improves work efficiency, and enhances the uniformity and quality of putty application.

[0004] The objective of this invention and the technical problem it solves are achieved by the following technical solution. A wind turbine blade leading edge conformal puttying and shaping fixture according to this invention includes a central positioning rod, long positioning rods, short positioning rods, a scraper, a connecting rod, a connecting shaft, and a caster wheel. The central positioning rod is located between a pair of long positioning rods and a pair of short positioning rods. The pair of long positioning rods and the pair of short positioning rods are rotatably connected to the central positioning rod via pins. A first elongated hole is provided at the front end of the central positioning rod, the long positioning rods, and the short positioning rods. One end of the connecting rod is fixed with a first bolt passing through the corresponding first elongated hole and locked with a first nut to fix the connecting rod to the corresponding positioning rod. The other end of the connecting rod... For fixed connection with the connecting shaft, the scraper is provided with several second elongated holes. The connecting shaft is fitted with the second elongated holes through connecting limiting parts to install and limit the scraper on each connecting shaft. The end of the scraper has a scraping end that fits with the leading edge of the blade to realize the scraping of putty. The front ends of the intermediate positioning rod, the long positioning rod and the short positioning rod are all equipped with the universal wheels. The rear ends of a pair of long positioning rods are connected by a first tension spring, and the rear ends of a pair of short positioning rods are connected by a second tension spring. When the two tension springs are in the tension state, they provide a contact force towards the leading edge of the blade for a pair of long positioning rods and a pair of universal wheels on the positioning rods.

[0005] Furthermore, a second bolt is pre-embedded and fixed at one end of the connecting shaft. After the second bolt passes through the connecting rod, it locks with the second nut to fix the connecting shaft to the corresponding connecting rod.

[0006] Furthermore, the connecting limiting component includes a third bolt and a third nut. The scraper has a rectangular thin plate structure. The scraper has two rows of second elongated holes spaced apart in its width direction. Each row of second elongated holes has five holes spaced apart along the length direction of the scraper. Each connecting shaft has two through holes spaced apart along its axial direction. The third bolt passes through the through holes and the second elongated holes and is connected to the corresponding third nut. The third nut does not press the scraper tightly onto the positioning shaft, so that the third bolt can move within the second elongated holes along the length extension direction of the second elongated holes.

[0007] Furthermore, a fixing bolt is provided at the rear end of the caster wheel. The fixing bolt passes through the opening at the front end of the corresponding positioning rod and is locked in place with the locking nut.

[0008] Furthermore, the intermediate positioning rod includes an intermediate rod body and a handheld crossbar part vertically connected to the intermediate rod body. The handheld crossbar part is located near the front end of the intermediate rod body and is located on the opposite side of the intermediate rod body where the connecting rod is fixed. A caster wheel is also fixed to the front end of the handheld crossbar part.

[0009] Furthermore, each long positioning rod and each short positioning rod has a spring connecting plate at its rear end, and a spring hook on the spring connecting plate. The two ends of the first tension spring are connected to the corresponding spring hooks, and the two ends of the second tension spring are connected to the corresponding spring hooks.

[0010] Furthermore, a clearance groove is provided on the opposite surfaces of the two long positioning rods, and a clearance groove is provided on the opposite surfaces of the two short positioning rods. The clearance grooves are located at the points where the pin shafts of the long and short positioning rods pass through. The two long positioning rods are nested together through the clearance grooves, and the two short positioning rods are nested together through the clearance grooves.

[0011] Furthermore, a handrail is provided on each side of the main body of the middle rod. The handrail is perpendicular to the main body of the middle rod and is located at the rear end of the shaft hole through which the pin shaft passes on the middle positioning rod. One handrail passes through the intersection area of ​​the rear ends of a pair of long positioning rods, and the other handrail passes through the intersection area of ​​the rear ends of a pair of short positioning rods.

[0012] Furthermore, the middle positioning rod, the long positioning rod, and the short positioning rod are all provided with openings that facilitate the locking of the corresponding locking nuts.

[0013] Furthermore, the scraper is made of spring steel plate.

[0014] By means of the above technical solution, the beneficial effects of the present invention are as follows: The present invention can achieve the application of putty in accordance with the airfoil of the blade leading edge and achieve self-adaptation with the change of the airfoil of the blade leading edge. The tooling, through the multi-point stable contact between the universal wheels and the blade leading edge, not only saves effort, but also ensures that the degree of contact or gap between the scraper and the blade leading edge remains unchanged when the putty is applied from the root to the tip or from the tip to the root. This makes it easier for manual operation and achieves the purpose of improving work efficiency, enhancing the uniformity and quality of putty application on the blade leading edge.

[0015] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of a wind turbine blade leading edge conformal puttying and shaping tool according to the present invention.

[0017] Figure 2 This is a rear view structural schematic diagram of a wind turbine blade leading edge conformal puttying and shaping tool according to the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the short positioning rod in this invention.

[0019] Figure 4 This is a front view schematic diagram of the short positioning rod in this invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the long positioning rod in this invention.

[0021] Figure 6 This is a front view schematic diagram of the long positioning rod in this invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the intermediate positioning rod in this invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the intermediate positioning rod in another embodiment.

[0024] Figure 9 This is a schematic diagram of the structure of the connecting rod in this invention having a first elongated hole.

[0025] Figure 10 This is a schematic diagram of the scraper in this invention when it is not bent.

[0026] Figure 11 This is a schematic diagram of the scraper in the present invention after it has been installed and limited to a bent state. Detailed Implementation

[0027] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0028] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] like Figures 1 to 11 A tooling for conformal puttying and shaping of the leading edge of a wind turbine blade includes a central positioning rod 1, long positioning rods 2, short positioning rods 3, a scraper 4, a connecting rod 5, a connecting shaft 6, a pin 7, a tension spring 8, and a caster wheel 9. A pair of long positioning rods 2 are located on one side of the central positioning rod 1, and a pair of short positioning rods 3 are located on the other side. The pair of long positioning rods and the pair of short positioning rods are rotatably connected to the central positioning rod 1 via the pin 7. That is, the same pin 7 connects the central positioning rod, the pair of long positioning rods, and the pair of short positioning rods, totaling five positioning rods. This also ensures that the two long positioning rods are rotatably connected relative to the pin, and the two short positioning rods are also rotatably connected relative to the pin. Taking the end of each positioning rod closest to the leading edge of the blade in the working state as the front end, a first elongated hole 10 is provided at the front end of the central positioning rod 1, the pair of long positioning rods 2, and the pair of short positioning rods 3. Five connecting rods 5 are provided, each connecting rod 5 being adapted to and connected to a corresponding positioning rod. In this embodiment, a first bolt 51 is pre-embedded at one end of the connecting rod 5. The first bolt 51 on the connecting rod 5 passes through the corresponding first elongated hole 10 and is locked in place by a first nut 52, so that the connecting rod is fixed on the corresponding positioning rod. The purpose of setting the first elongated hole is to allow the connecting rod to be adjusted along the length extension direction of the elongated hole, thereby adjusting the relative distance between the scraper and the positioning rod, so as to adjust the thickness of the putty. A connecting shaft 6 is fixedly connected to the other end of each connecting rod 5. A second bolt 61 is pre-embedded and fixed at one end of the connecting shaft 6. The second bolt 61 on the connecting shaft passes through the connecting rod and is locked in place by a second nut 62, so as to fix the connecting shaft to the corresponding connecting rod. Several connecting shafts are distributed on a curved surface that can conform to the leading edge surface of the blade to facilitate connection with the scraper and to bend the scraper into the required shape.

[0030] In this embodiment, the scraper 4 is preferably made of spring steel plate, which has certain strength and flexibility, long service life, and good putty application effect. However, the present invention does not limit the specific material of the scraper; the scraper 4 has a rectangular thin plate structure, and its unbent state is as follows: Figure 9 After installation and positioning, it can appear as follows Figure 10As shown, the scraper 4 has a scraping end 41 for applying putty, which is adapted to fit the curved leading edge surface of the blade. A second elongated hole 42 is provided on the scraper. The connecting shaft 6 is connected to the scraper 4 via a third bolt 63 and a third nut 64. The axial direction of the third bolt 63 is perpendicular to the axial direction of the connecting shaft 6. Specifically, the scraper 4 has five second elongated holes 42 spaced apart along its length, forming a row of five holes. The scraper also has two rows of second elongated holes spaced apart along its width, resulting in a total of ten second elongated holes on the scraper to accommodate five connecting shafts. Correspondingly, each connecting shaft 6 has two through holes 65 spaced apart along its axial direction. The third bolt 63 passes through the through holes 65 and the second elongated holes 42 and is then connected to the third nut 64.

[0031] The front ends of the intermediate positioning rod 1, the long positioning rod 2, and the short positioning rod 3 are all equipped with casters 9. Specifically, the fixing bolt 91 at the rear end of the caster 9 passes through the opening at the front end of the corresponding positioning rod and is connected to the locking nut 92 to fix the caster to the front end of the corresponding positioning rod. In this embodiment, the intermediate positioning rod 1 includes an intermediate rod body 11 and a hand-held crossbar 12 vertically connected to the intermediate rod body. The hand-held crossbar 12 is located near the front end of the intermediate rod body and is located on the opposite side of the intermediate rod body where the connecting rod is fixed. The hand-held crossbar 12 is the hand-held part that pushes the tooling and makes the tooling slide on the leading edge of the blade. A caster is fixed at the front end of the intermediate rod body 11, and a caster is also fixed at the front end of the hand-held crossbar 12. Therefore, in this embodiment, the tooling is equipped with a total of six casters.

[0032] In this embodiment, the tension spring 8 includes a first tension spring and a second tension spring. The rear ends of the two long positioning rods 2 are connected by the first tension spring, and the rear ends of the two short positioning rods 3 are connected by the second tension spring. The two tension springs 8 are in a stretched state when all the casters are in contact with the leading edge of the blade. The tension springs in the stretched state provide a contact force facing the leading edge of the blade to the front ends of the pair of long positioning rods and the pair of short positioning rods, so that the casters at the front ends of the pair of long positioning rods and the pair of short positioning rods always maintain contact with the leading edge of the blade when sliding on the surface of the leading edge of the blade. When each caster contacts the surface of the leading edge of the blade, a uniform gap is formed between the scraper and the leading edge of the blade. The gap is set according to the required thickness of the putty layer. Preferably, each long positioning rod has a spring connecting plate 13 at its rear end. The angle between the spring connecting plate 13 and the long positioning rod it is connected to is an obtuse angle. Each of the two spring connecting plates of the pair of long positioning rods is provided with a spring hook 14. The two ends of the tension spring are respectively connected to the spring hook to realize the detachable installation and positioning of the tension spring. Similarly, each short positioning rod also has a spring connecting plate 13 and a spring hook 14 on the spring connecting plate at its rear end, which will not be described in detail here. In order to ensure that the two spring connecting plates at the rear ends of a pair of long positioning rods / a pair of short positioning rods are in the same plane, and thus the tension spring and the universal wheel connected to the front end of the corresponding positioning rod are in the same plane, clearance grooves 15 can be provided on the part of the pair of long positioning rods / a pair of short positioning rods where the pin shaft passes through. A clearance groove is provided on the opposite side of the two long positioning rods, and a clearance groove is provided on the opposite side of the two short positioning rods. The clearance grooves have a certain length along the length of the positioning rod, so that the two long positioning rods nest or fit together, and the two short positioning rods nest or fit together. This does not affect the relative rotation of the two long positioning rods (or the two short positioning rods) around the pin shaft, and also makes the direction of the contraction force of the tension spring and the direction of the contact force applied by the corresponding universal wheel to the leading edge of the blade as close to the same plane as possible. The tension spring will not tilt excessively (the central axis of the tension spring can be perpendicular to the spring connecting plate), making the overall structural design of the tooling more reasonable. When the long positioning rod and short positioning rod are viewed without the spring connecting plate, both the long positioning rod and the short positioning rod are L-shaped. If the main body 16 of the positioning rod is defined as the long / short positioning rod rotatably connected to the pin shaft, then the crossbar 17 of the positioning rod is perpendicularly connected to the front end of the main body 16. The crossbar is shorter than the corresponding main body 16, and the first long hole and the universal wheel are both set on the corresponding crossbar.

[0033] In this embodiment, the third nut and the third bolt cooperate to form a connecting limiting component, realizing the connection and cooperation between the scraper and all positioning shafts. The third nut 64 does not need to be locked to press and fix the scraper on each positioning shaft. The third nut 64 only needs to limit the scraper in the thickness direction of the scraper to ensure that the scraper will not detach from the connecting shaft. Therefore, the third bolt 63 can move along the length extension direction of the second long hole 42 during the tooling movement construction. The purpose of this setting is that: during the movement of the tooling from the blade root to the blade tip (or from the blade tip to the blade root) of the blade leading edge, the curvature of the blade leading edge changes. Under the action of the tension spring 8, the long / short positioning rod always contacts the blade leading edge through the universal wheel 9. Therefore, during the movement of the tooling along the blade curvature, the unfolding stroke of the long / short positioning rod and the unfolding stroke of the scraper may be inconsistent. The second long hole on the scraper provides a margin for this inconsistency of stroke. That is, the second long hole 42 is opened to release a certain degree of freedom for the scraper in the process of adapting to different curvature blade shapes.

[0034] The working principle of this invention is as follows: During use, the mixed putty is applied intermittently to the leading edge area of ​​the blade. Then, the wind turbine blade leading edge conformal putty shaping tool is held and pushed onto the leading edge of the blade, ensuring the six universal wheels are in contact with the blade airfoil. Next, the position of the connecting rod on the corresponding positioning rod is adjusted so that the scraper (spring steel plate) and the leading edge of the blade are as close as possible to each other according to the required putty thickness. The first nut is then tightened to secure the connecting rod. It should be noted that adjusting the position of the connecting rod in the first elongated hole is to adjust the required putty thickness. Therefore, the "closest contact" between the scraper and the leading edge of the blade in this step refers to maintaining the required gap between the scraper and the leading edge of the blade. The size of this gap is the required putty layer thickness. Furthermore, through this adjustment, the curvature of the scraper's scraping end matches the blade curvature at the initial working position and will continue to match during subsequent movements. The scraper forms an acute angle with the leading edge of the blade when scraping the putty, i.e., the scraper and the tool's advancing direction form an acute angle. Then, the wind turbine blade leading edge conformal putty trimming tool is pushed from the blade root to the blade tip (or from the blade tip to the blade root) to perform putty application. A pair of long positioning rods and a pair of short positioning rods remain in contact with the blade leading edge surface under the action of tension springs, so that the gap between the spring steel plate and the blade leading edge remains unchanged (i.e., the fit between the scraper and the blade leading edge remains unchanged). Specifically, because the six casters are always pressed against the blade under the action of springs, no matter how much force is applied to the tool in the direction of the blade leading edge, it is only the contact force between the six casters and the blade leading edge surface. Since the gap between the scraper and the blade leading edge is constant, the putty layer thickness is highly uniform, thus achieving the purpose of uniformly and efficiently applying putty to the leading edge of the wind turbine blade.

[0035] As an optimization, such as Figure 11As shown, a handrail 17 can also be provided on both sides of the main body 11 of the intermediate rod. The handrail 17 is perpendicular to the main body of the intermediate rod and is located at the rear end of the shaft hole 18 through which the pin shaft passes on the intermediate positioning rod. One handrail extends from the intersection area of ​​the rear ends of a pair of long positioning rods, and the other handrail extends from the intersection area of ​​the rear ends of a pair of short positioning rods. It can be seen that the handrails have a similar function to the handrail, increasing the number of handholds in actual use and making it easier to handle various working conditions. In addition, combined with 7 to Figure 9 Considering the short length of the main body 11 of the intermediate rod, it is inconvenient to set the first elongated hole on the main body 11 of the intermediate rod. Therefore, the second elongated hole can also be set on the connecting rod 5, and the first bolt is pre-embedded in the main body of the intermediate rod. In this case, the connecting rod is as follows: Figure 9 As shown, the first elongated hole is located on the perforated plate extending from the connecting rod. This method can still achieve position adjustment of the connecting rod relative to the length extension direction of the intermediate positioning rod.

[0036] The above description is merely a preferred embodiment of the present invention, and all aspects not detailed herein are existing technologies. Any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A wind turbine blade leading edge conformal putty trimming tooling, characterized in that, The utility model provides a kind of long and short positioning rod for plastering, including middle positioning rod, long positioning rod, short positioning rod, scraper, connecting rod, connecting shaft and universal wheel, middle positioning rod is located between a pair of long positioning rod and a pair of short positioning rod, a pair of long positioning rod and a pair of short positioning rod are rotatably connected with middle positioning rod by pin shaft;The front end of middle positioning rod, long positioning rod and short positioning rod is equipped with first long hole, one end of connecting rod is fixedly provided with first bolt passing through first long hole and being locked with first nut to make connecting rod be fixed on corresponding positioning rod, the other end of connecting rod is fixed with connecting shaft, scraper is equipped with several second long holes, connecting shaft is connected with second long hole by connecting limiting piece to install and limit scraper on each connecting shaft, the end of scraper has the cooperation with blade leading edge to realize the scraping end of plastering, the front end of middle positioning rod, long positioning rod and short positioning rod is equipped with universal wheel, the rear end of a pair of long positioning rod is connected by first tension spring, the rear end of a pair of short positioning rod is connected by second tension spring, two tension springs provide contact force towards blade leading edge for universal wheel on a pair of long positioning rod and a pair of positioning rod when being in tension state; Connecting limiting piece includes third bolt and third nut, scraper is rectangular thin plate structure, scraper is provided with two columns of second long holes in width direction, and five second long holes are provided in each column along the length direction of scraper;Every connecting shaft is provided with two through holes along its axial direction, and the third bolt is connected with the corresponding third nut after passing through the through hole and the second long hole;Third nut does not press tightly and fix the scraper on positioning shaft, so that the third bolt can move in the second long hole along the length direction of the second long hole.

2. A wind turbine blade leading edge conformal putty squeegee tooling according to claim 1, wherein: One end of connecting shaft is pre-buried and fixed with second bolt, and the second bolt is locked with second nut after passing through connecting rod to realize the fixation of connecting shaft and corresponding connecting rod.

3. A wind turbine blade leading edge conformal putty shaving tooling according to claim 1, characterized in that: The rear end of universal wheel is provided with fixed bolt, and the fixed bolt is locked and connected with locking nut after penetrating into the opening of the front end of corresponding positioning rod.

4. A wind turbine blade leading edge conformal putty squeegee tooling according to claim 1, wherein: The middle positioning rod includes a middle rod main body and a hand-held cross rod connected perpendicularly to the middle rod main body, the hand-held cross rod is arranged near the front end of the middle rod main body, and the hand-held cross rod is arranged on the opposite side of the middle rod main body where the connecting rod is fixed, and the front end of the hand-held cross rod is also fixed with a universal wheel.

5. A wind turbine blade leading edge conformal putty shaving tooling according to claim 1, characterized in that: The rear end of each long positioning rod and the rear end of each short positioning rod are provided with a spring connecting plate, the spring connecting plate is provided with a spring hook, the two ends of the first tension spring are respectively connected with the corresponding spring hooks, and the two ends of the second tension spring are respectively connected with the corresponding spring hooks.

6. A wind turbine blade leading edge conformal putty shaving tooling according to claim 5, characterized in that: Opposite surfaces of the two long positioning rods are respectively provided with an avoiding slot, and opposite surfaces of the two short positioning rods are respectively provided with an avoiding slot, the avoiding slot is located at a position where the pin shaft passes through the long positioning rod and the short positioning rod, the two long positioning rods are nested with each other through the avoiding slot, and the two short positioning rods are nested with each other through the avoiding slot.

7. A wind turbine blade leading edge conformal putty shaving tooling according to claim 4, characterized in that: One handrail is arranged on each side of the middle rod main body, the handrails are perpendicular to the middle rod main body, the handrails are located at the rear end of the shaft hole through which the pin shaft passes on the middle positioning rod, one handrail passes out from the rear end rod part intersection area of the pair of long positioning rods, and the other handrail passes out from the rear end rod part intersection area of the pair of short positioning rods.

8. A wind turbine blade leading edge conformal putty squeegee tooling according to claim 3, wherein: The middle positioning rod, the long positioning rod and the short positioning rod are provided with windows for locking the corresponding locking nuts.

9. A wind turbine blade leading edge conformal putty squeegee tooling according to claim 1, wherein: The scraper is made of spring steel plate.

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