Blade zero position locating tool

Abstract

The utility model belongs to the technical field of wind power blade, specifically discloses a blade zero scale positioning tool, including positioning base plate, positioning pin and calibration ruler, positioning base plate is provided with the locating plane, positioning pin is installed in the positioning base plate, the positioning base plate is detachable through the positioning pin and is installed in the blade's blade root, the locating plane is in the positioning base plate installation state and is attached to the axial end surface of blade's blade root flange, calibration ruler is set up in the radial outer side of blade root flange, calibration ruler one end is connected to the positioning base plate, the other end extends to the blade tip direction of blade's axial direction, calibration ruler can be limited and slides along the radial blade root flange to be close to or far from the blade's blade root, and calibration ruler is provided with calibration line, the utility model can accurately calibrate the position of the zero angle of blade, has the advantages such as simple operation, high positioning accuracy, can guarantee the consistent of the installation position of multiple blades.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine blade technology, and particularly relates to a blade zero-scale positioning fixture. Background Technology

[0002] With the rapid development of the wind power industry, wind turbine blades are becoming larger and heavier. During blade manufacturing and installation, the precise calibration of the zero-degree angle position directly affects the wind turbine's operating performance. If there is a deviation in the blade's zero-degree angle position, the actual torque at different wind speeds will differ from the design value, thus affecting the precise control of the wind turbine's speed and torque, ultimately reducing power generation efficiency. Furthermore, when the zero-degree installation positions of the blades within the same wind turbine are inconsistent, it will cause dynamic balance problems during turbine operation, exacerbating system vibration, increasing structural loads, and severely impacting the wind turbine's operational stability and service life.

[0003] Currently, the industry mainly uses a combination of blade installation angle scales and hub blade wheel load pointers to determine the zero-position installation angle. However, this method suffers from problems such as complex operation and insufficient positioning accuracy. Especially during the installation of large blades, traditional calibration methods cannot guarantee the consistency of the installation positions of multiple blades, and there is an urgent need to develop dedicated zero-scale inspection fixtures to solve this technical problem.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0005] The purpose of this invention is to provide a blade zero-degree positioning fixture to solve the problems of complex zero-degree angle calibration and insufficient positioning accuracy of wind turbine blades.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: a blade zero-scale positioning fixture, comprising a positioning base plate, a positioning pin, and a calibration ruler. The positioning base plate is provided with a positioning plane, the positioning pin is installed on the positioning base plate, and the positioning base plate is detachably installed on the blade root via the positioning pin. The positioning plane is in contact with the axial end face of the blade root flange when the positioning base plate is installed. The calibration ruler is provided on the radial outer side of the blade root flange. One end of the calibration ruler is connected to the positioning base plate, and the other end extends along the axial direction of the blade towards the blade tip. The calibration ruler can be limited to slide radially along the blade root flange to approach or move away from the blade root. The calibration ruler is provided with calibration lines.

[0007] Furthermore, it also includes a slide plate, which is fixedly mounted on the end of the calibration ruler. The positioning base plate is provided with a first groove extending radially along the blade root flange. The slide plate can be slidably mounted in the first groove, and the calibration ruler and the positioning base plate are slidably connected through the slide plate.

[0008] Furthermore, it also includes a second positioning plate, which is mounted on the working plane and is attached to the radial end face of the blade root flange when the positioning base plate is installed.

[0009] Furthermore, the second positioning plate is provided with a clearance groove at the position corresponding to the calibration line.

[0010] Furthermore, it also includes a handle, which is fixedly mounted on the positioning base plate.

[0011] Furthermore, the positioning base plate is provided with multiple mounting holes, which are arranged along the circumference of the blade root flange. The number of positioning pins is provided in multiple ways corresponding to the number of mounting holes, and the multiple positioning pins are inserted into the mounting holes one by one.

[0012] Furthermore, it also includes a locking member. The slide plate is provided with a second slide groove along the sliding direction. The locking member passes through the second slide groove and is connected to the bottom of the first slide groove. The locking member can be manipulated to move towards the bottom of the first slide groove to press and limit the slide plate within the first slide groove.

[0013] The beneficial effects of this technical solution are as follows:

[0014] Compared with existing technologies, the blade zero-degree positioning fixture of this utility model can quickly and accurately calibrate the position of the blade at zero degree angle by using a positioning base plate and an adjustable calibration ruler. It solves the problems of complex operation and insufficient positioning accuracy of traditional calibration methods, and has the advantages of simple operation, high positioning accuracy, and ensuring the consistency of the installation position of multiple blades. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a blade zero-scale positioning fixture according to the present invention;

[0016] Figure 2 This is a schematic diagram of the positioning substrate.

[0017] Figure 3 This is a structural diagram of the calibration ruler;

[0018] Figure 4 This is a structural diagram of a locating pin. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method:

[0020] The reference numerals in the accompanying drawings include: positioning base plate 1, first slide groove 101, mounting hole 102, positioning pin 2, insertion section 201, limiting section 202, calibration ruler 3, calibration line 301, sliding plate 4, second slide groove 401, second positioning plate 5, handle 6.

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The basic implementation examples are as follows: Figure 1-4 As shown: A blade zero-scale positioning fixture includes a positioning base plate 1, a positioning pin 2, and a calibration ruler 3. The positioning base plate 1 is provided with a positioning plane, the positioning pin 2 is installed on the positioning base plate 1, the zero-scale line of the blade is set at the blade root position, and the blade root is provided with a blade root flange. The positioning base plate 1 is detachably installed on the blade root through the positioning pin 2. When the positioning base plate 1 is installed, it is in contact with the axial end face of the blade root flange. The calibration ruler 3 is set on the radial outer side of the blade root flange. One end of the calibration ruler 3 is connected to the positioning base plate 1, and the other end extends along the axial direction of the blade towards the blade tip. The calibration ruler 3 can be limited to slide radially along the blade root flange to approach or move away from the blade root. The calibration ruler 3 is provided with a calibration line 301. The positioning pin 2 is inserted into the bolt mounting hole 102 of the blade root flange to position the positioning base plate 1 on the blade root. After the positioning base plate 1 is installed on the blade root, its positioning plane is attached to the axial end face of the blade root flange. At this time, by sliding the calibration ruler 3, the calibration ruler 3 is attached to the radial surface of the blade root. By observing the relative positional relationship between the calibration line 301 and the zero degree line of the blade root, it is possible to quickly and accurately determine whether the zero degree line is accurate. The positioning base plate 1 can be made of metal sheet, and its positioning plane needs to be precision ground to ensure flatness. The positioning pin 2 can be a cylindrical pin or a conical pin, and the quantity can be set to 2-4 as needed. The calibration ruler 3 can be made of stainless steel, and its sliding connection can be achieved through a structure such as a guide rail slider. The sliding limit of the calibration ruler 3 can be achieved by setting a limit block or using a graduated handwheel adjustment mechanism. The calibration line 301 is a through groove extending along the blade axis, which is obtained by machining on the calibration ruler 3. This structure makes calibration and calibration easier. The positioning base plate 1 and the positioning pin 2 achieve quick and accurate connection and positioning with the blade root, and the radially sliding calibration ruler 3 is used for zero-scale calibration. The fit between the positioning plane and the axial end face of the blade root flange ensures the axial positioning reference, and the radial sliding adjustment function of the calibration ruler 3 allows it to adapt to blades of different sizes. This tooling solves the problem of inaccurate zero-degree angle position calibration of blades. Compared with traditional calibration methods, it has the advantages of simple operation and high positioning accuracy, which can effectively ensure the accuracy of blade installation angle, thereby ensuring that the performance parameters of the wind turbine meet the design requirements during operation.

[0023] In this embodiment, a sliding plate 4 is also included. The sliding plate 4 is fixedly disposed at the end of the calibration ruler 3. The positioning base plate 1 is provided with a first groove 101 extending radially along the blade root flange. The sliding plate 4 is slidably mounted in the first groove 101, and the calibration ruler 3 and the positioning base plate 1 are slidably connected through the sliding plate 4. The sliding plate 4 can be made of metal sheet or high-strength engineering plastic, and its thickness must meet the rigidity requirements during sliding. The fixing connection method between the sliding plate 4 and the calibration ruler 3 includes, but is not limited to, bolt connection, welding, or integral molding. The cross-sectional shape of the first groove 101 can be a T-groove, dovetail groove, or rectangular groove. The shape of the sliding plate 4 must match the first groove 101 to ensure sliding stability. The locking mechanism can be a threaded fastener, an eccentric wheel locking device, or a quick-clamping mechanism, which fixes the position of the sliding plate 4 by applying pressure perpendicular to the sliding direction. Additionally, as a preferred embodiment, a wear-resistant pad can be provided between the sliding plate 4 and the first groove 101 to reduce friction loss. By cooperating with the sliding plate 4 and the first sliding groove 101, precise sliding adjustment of the calibration scale 3 along the radial direction of the blade root flange is achieved, solving the problem of traditional tooling making it difficult to quickly adjust the radial position of the calibration scale 3. This structure simplifies the operation steps while ensuring positioning accuracy, avoiding the cumulative errors caused by repeated disassembly. The sliding locking mechanism ensures the positional stability of the calibration scale 3 during the measurement process, making it particularly suitable for zero-scale calibration requirements of blades of different sizes. Compared with the solution of directly moving the calibration scale 3, this design effectively reduces the risk of deformation of the calibration scale 3 by distributing the force through the sliding plate 4, extending the service life of the tooling.

[0024] In this embodiment, a second positioning plate 5 is also included. The second positioning plate 5 is installed on the working plane and is attached to the radial end face of the blade root flange when the positioning base plate 1 is installed. As an additional component, the second positioning plate 5 is installed on the working plane and can be fixed by bolt connection or welding. The flatness of the contact surface between the second positioning plate 5 and the radial end face of the blade root flange can be ensured by precision machining. As a preferred embodiment, the second positioning plate 5 can be made of the same metal material as the positioning base plate 1. The setting of the second positioning plate 5 further ensures the accuracy of calibration. This bidirectional positioning structure of the second positioning plate 5 and the positioning plane can ensure the positioning accuracy of the positioning base plate 1 at the blade root, thereby ensuring the positional accuracy of the calibration ruler 3. The second positioning plate 5 can be set as one or two, and its setting position is preferably at the radial end of the positioning plane along the blade root flange, that is, it can be attached to the inner periphery of the blade root flange after installation, or it can be attached to the outer periphery, and the structure is an arc-shaped structure that conforms to the blade root flange.

[0025] In this embodiment, the second positioning plate 5 is provided with a clearance groove corresponding to the calibration line 301. The clearance groove is a through-slot structure opened on the second positioning plate 5, its position corresponding to the calibration line 301 of the calibration ruler 3. The specific shape of the clearance groove can be rectangular, U-shaped, or other suitable shapes, and its size should ensure that the calibration line 301 is clearly visible and not obstructed by the second positioning plate 5, thus ensuring the visibility and measurement accuracy of the blade's zero-scale line during calibration. As a preferred embodiment, the edge of the clearance groove can be chamfered to avoid scratching the operator or damaging the calibration ruler 3. By setting the clearance groove, the obstruction of the blade's zero-scale line by the second positioning plate 5 can be effectively avoided, facilitating the operator to accurately read the zero-scale position. Compared with the prior art, this solution has a simple structure, is easy to implement, and can significantly improve the accuracy and reliability of blade zero-scale positioning. Therefore, the accuracy of blade zero-scale positioning is effectively improved, providing a reliable guarantee for the accurate calibration of the subsequent blade installation angle.

[0026] In this embodiment, a handle 6 is also included, which is fixedly installed on the positioning base plate 1. The handle 6 can be fixed to the positioning base plate 1 by welding, bolting, or riveting. The handle 6 can be U-shaped, ring-shaped, or straight rod-shaped, and its material can be metal or high-strength plastic. As a preferred embodiment, the surface of the handle 6 can be provided with anti-slip textures or a rubber sleeve to improve operating comfort. The handle 6 can be installed on the upper part or side of the positioning base plate 1, and the specific position can be adjusted according to actual usage requirements. By providing the handle 6 on the positioning base plate 1, the tooling can be more easily gripped and operated during installation and disassembly. Specifically, when the positioning base plate 1 needs to be installed to the blade root, the operator can apply a stable force through the handle 6 to ensure a tight fit between the positioning plane and the axial end face of the blade root flange; during disassembly, the handle 6 also provides a reliable force application point. This solves the problem of difficult handling of large blade positioning tooling due to its weight and volume, and improves the convenience and safety of positioning operations. Compared with the prior art, this solution significantly improves the operability of the tooling while maintaining the original positioning accuracy.

[0027] In this embodiment, the positioning base plate 1 is provided with multiple mounting holes 102, which are arranged circumferentially along the blade root flange. Multiple positioning pins 2 are provided corresponding to the number of mounting holes 102, and each positioning pin 2 is inserted into a corresponding mounting hole 102. In this embodiment, two mounting holes 102 are provided. The positioning pin 2 has a stepped structure, with an insertion section 201 that inserts into the threaded mounting hole 102 of the blade root flange, and a limiting section 202 for positioning. The diameter of the insertion section 201 is not greater than the diameter of the mounting hole 102 to ensure smooth insertion, while the diameter of the limiting section 202 is greater than the mounting hole 102. This diameter difference allows the positioning pin 2 to be inserted into the mounting hole 102 without passing through it. In this embodiment, the positioning base plate 1 is an arc-shaped ring-shaped plate structure, and its axial end face is the positioning plane. The mounting holes 102 are axially through. After insertion, the axis of the positioning pin 2 is perpendicular to the positioning plane, further positioning and limiting the positioning base plate 1. By using multiple circumferentially distributed locating pins 2 in conjunction with mounting holes 102, the positioning base plate 1 can be fixed at multiple points on the blade root flange, effectively improving installation stability and positioning accuracy. Compared with single-point fixing, this structure can evenly distribute the load, avoid local stress concentration, and prevent the positioning base plate 1 from shifting or rotating during operation. In specific implementation, an appropriate number of locating pins 2 can be selected according to the blade size and weight, ensuring positioning accuracy while also considering ease of assembly and disassembly.

[0028] In this embodiment, a locking component is also included. The slide plate 4 has a second groove 401 along the sliding direction. The locking component passes through the second groove 401 and connects to the bottom of the first groove 101. The locking component can be manipulated to move towards the bottom of the first groove 101 to press and limit the slide plate 4 within the first groove 101. The locking component can be a bolt, an eccentric wheel, or a quick clamp. Bolts can achieve axial movement through threaded engagement; eccentric wheels generate radial displacement by rotating an eccentric shaft, thereby pushing the locking component downwards; quick clamps achieve rapid locking through a lever principle. The cross-sectional shape of the second groove 401 can be designed as a T-groove or a dovetail groove to enhance the stability of the fit between the slide plate 4 and the locking component. The connection methods between the locking component and the bottom of the first groove 101 include, but are not limited to, threaded connection, welding fixation, or using elastic gaskets for buffering and pressing. The precise fixing of the radial position of the calibration ruler 3 is achieved through a mechanical locking mechanism. Once the calibration line 301 is adjusted to the target position, a vertically downward pressure is applied to the slide plate 4 via the locking mechanism, generating sufficient friction between it and the first slide groove 101. This eliminates the risk of displacement of the calibration ruler 3 under blade vibration conditions. Compared to the traditional method of manual fixing, this structure features quantifiable locking force and high repeatability, effectively ensuring that the calibration ruler 3 does not shift during zero-scale calibration, thus ensuring the accuracy of blade zero-position angle detection. In practice, operators only need to rotate the bolt or move the clamps to complete the locking action, significantly improving the ease of operation of the tooling.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A blade zero-scale positioning fixture, characterized in that: The device includes a positioning base plate, a positioning pin, and a calibration ruler. The positioning base plate has a positioning plane, and the positioning pin is mounted on the positioning base plate. The positioning base plate is detachably mounted to the blade root via the positioning pin. When the positioning base plate is installed, the positioning plane is in contact with the axial end face of the blade root flange. The calibration ruler is located radially outside the blade root flange. One end of the calibration ruler is connected to the positioning base plate, and the other end extends along the blade axis towards the blade tip. The calibration ruler can be limited to slide radially along the blade root flange to approach or move away from the blade root. The calibration ruler has calibration lines.

2. The blade zero-scale positioning fixture according to claim 1, characterized in that: It also includes a sliding plate, which is fixedly mounted on the end of the calibration ruler. The positioning base plate is provided with a first sliding groove extending radially along the blade root flange. The sliding plate is slidably mounted in the first sliding groove, and the calibration ruler and the positioning base plate are slidably connected through the sliding plate.

3. The blade zero-scale positioning fixture according to claim 2, characterized in that: It also includes a second positioning plate, which is mounted on the working plane and is attached to the radial end face of the blade root flange when the positioning base plate is installed.

4. The blade zero-scale positioning fixture according to claim 3, characterized in that: The second positioning plate is provided with a clearance groove at the position corresponding to the calibration line.

5. The blade zero-scale positioning fixture according to claim 4, characterized in that: It also includes a handle, which is fixedly mounted on the positioning base plate.

6. The blade zero-scale positioning fixture according to claim 5, characterized in that: The positioning base plate is provided with multiple mounting holes, which are arranged circumferentially along the blade root flange. The number of positioning pins is provided in multiple manner corresponding to the number of mounting holes, and the multiple positioning pins are inserted into the mounting holes one by one.

7. The blade zero-scale positioning fixture according to claim 6, characterized in that: It also includes a locking member. The slide plate is provided with a second slide groove along the sliding direction. The locking member passes through the second slide groove and is connected to the bottom of the first slide groove. The locking member can be manipulated to move towards the bottom of the first slide groove to press and limit the slide plate to the first slide groove.

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