Blade root pitch circle control tool and blade root pitch circle control method

Abstract

The invention discloses a blade root pitch circle control tool and a blade root pitch circle control method. The blade root pitch circle control tool comprises a mounting frame, the mounting frame comprises a back plate and a supporting ring, and the supporting ring is connected in the circumferential direction of the back plate in a surrounding mode; the telescopic assembly is arranged on the mounting frame in the radial direction of the back plate, the telescopic end of the telescopic assembly is connected with the supporting ring, and the fixed end of the telescopic assembly is connected with the back plate; the position detector can detect the telescopic amount of the telescopic assembly. The control module is electrically connected with the telescopic assembly and the position detector. The problems that manual installation and adjustment are low in efficiency and poor in precision are solved. According to the blade root pitch circle control tool and the blade root pitch circle control method provided by the embodiment of the invention, the telescopic assembly is connected with the mounting frame, so that the blade root pitch circle position is supported, and the deformation of the blade root is controlled; the position sensor detects the telescopic quantity change of the telescopic assembly, the control module controls the telescopic assembly to act, automatic control over the blade root pitch circle is achieved, efficiency is improved, and the adjusting precision is high.

Description

Technical Field

[0001] The present application belongs to the technical field of wind turbine blades, and in particular relates to a blade root pitch circle control tool and a blade root pitch circle control method. Background Art

[0002] With the rapid development of the wind power industry, the demand for wind turbine blades, as the core components of wind turbines, continues to increase, and the requirements for product quality and production efficiency are becoming more stringent. The root of a wind turbine blade is a crucial connecting part in a wind turbine, responsible for tightly combining the blade with the wind turbine rotor hub to ensure stable operation under various complex loads. The root pitch circle refers to the diameter of the wind turbine blade at the root. The size of the root pitch circle is directly related to the stability of the connection between the blade and the hub, as well as the blade's ability to resist bending under extreme wind loads.

[0003] The deformation of the blade root pitch circle directly affects the matching and stability of the connection between the blade and the wind turbine rotor hub. With the trend of larger wind turbine blades, the diameter and size of the blade root pitch circle are gradually increasing, which puts higher requirements on deformation control. Excessive deformation may cause the connection between the blade and the hub to fail, and even cause safety accidents.

[0004] Therefore, it is particularly important to support the blade root to avoid deformation of the blade root pitch circle position. Existing blade root pitch circle support devices are all installed and adjusted manually, which is inefficient and poor in precision. Summary of the invention

[0005] The embodiments of the present application provide a blade root pitch circle control tool and a blade root pitch circle control method, which can automatically adjust the blade root pitch circle in real time and improve the control efficiency and control accuracy of the blade root pitch circle.

[0006] On the one hand, an embodiment of the present application provides a blade root pitch circle control tooling, comprising: a mounting frame, the mounting frame comprising a back plate and a support ring, the support ring being connected to the circumference of the back plate, and the back plate being connectable to the blade root; a telescopic assembly, the telescopic assembly being arranged on the mounting frame at equal angles along the radial direction of the back plate, the telescopic end of the telescopic assembly being connected to the support ring, and the fixed end of the telescopic assembly being connected to the back plate; a position detector, the position detector being able to detect the telescopic amount of the telescopic assembly; and a control module, the control module being electrically connected to the telescopic assembly and the position detector, and the control module controlling the movement of the telescopic assembly based on the telescopic amount to control the blade root pitch circle.

[0007] According to the blade root pitch circle control tooling of the embodiment of the present application, the telescopic assembly includes:

[0008] A guide mechanism, the guide mechanism comprising a guide rail and a slider, the guide rail being arranged on the back plate along the radial direction of the back plate, one end of the slider abutting against the support ring, the slider being fixed on the back plate, and the other end of the slider fitting in the guide rail;

[0009] A telescopic member is disposed in the guide rail, a telescopic end of the telescopic member is connected to the slider, and a fixed end of the telescopic member is connected to the back plate.

[0010] According to the blade root pitch circle control tooling of the embodiment of the present application, the telescopic member is a telescopic cylinder.

[0011] According to the blade root pitch circle control tooling of the embodiment of the present application, it also includes a first pressure sensor, which is installed at the telescopic end of the telescopic assembly. The first pressure sensor obtains the deformation pressure of the blade root and sends the deformation pressure signal to the control module to control the supporting force of the telescopic assembly.

[0012] According to the blade root pitch circle control tooling of the embodiment of the present application, it also includes a second pressure sensor, which is installed at the fixed end of the telescopic cylinder. The second pressure sensor obtains the internal pressure of the telescopic cylinder and sends an internal pressure signal to the control module to issue an alarm signal.

[0013] According to the blade root pitch circle control tooling of the embodiment of the present application, it also includes a locking structure. When the pressure value detected by the first pressure sensor is greater than or equal to the pressure threshold of the control module, the locking structure can lock the telescopic assembly at a position with a specified telescopic amount.

[0014] On the other hand, an embodiment of the present application further provides a blade root pitch circle control method, comprising:

[0015] Acquire a current expansion and contraction amount signal of a blade root pitch circle control tooling, wherein the current expansion and contraction amount signal is the expansion and contraction amount of the blade root pitch circle control tooling generated when the blade root is installed at the blade root and the blade root is deformed by force;

[0016] A telescopic amount adjustment signal is obtained according to the current telescopic amount signal and the telescopic amount threshold, and the telescopic amount adjustment signal is sent to the blade root pitch circle control tooling; wherein the telescopic amount threshold is the telescopic amount of the blade root pitch circle control tooling when the blade root is a target perfect circle.

[0017] According to the blade root pitch circle control method of the embodiment of the present application, obtaining a telescopic amount adjustment signal according to the current telescopic amount signal and the telescopic amount threshold, and sending the telescopic amount adjustment signal to the blade root pitch circle control tooling includes:

[0018] Obtaining expansion amount difference adjustment data according to the current expansion amount signal and the expansion amount threshold, wherein the expansion amount difference adjustment data includes a plurality of expansion amount adjustment signals;

[0019] According to the telescopic difference adjustment data, an adjustment sequence and an adjustment range are determined, and an adjustment sequence signal and an adjustment range signal are sent to the blade root pitch circle control tooling.

[0020] According to the blade root pitch circle control method of the embodiment of the present application, the adjusting data according to the telescopic amount difference is adjusted to determine the adjustment sequence, and the adjustment sequence signal is sent to the blade root pitch circle control tooling, including:

[0021] Determine a positive difference group and a negative difference group according to the stretch amount difference adjustment data, wherein the positive difference group is a data group in which the current stretch amount signal is greater than the stretch amount threshold, and the negative difference group is a data group in which the current stretch amount signal is less than the stretch amount threshold;

[0022] The positive difference signal of the positive difference group and the negative difference signal of the negative difference group are sent to the blade root pitch circle control tooling in sequence.

[0023] According to the blade root pitch circle control method of the embodiment of the present application, the adjusting data according to the telescopic amount difference is adjusted to determine the adjustment sequence, and the adjustment sequence signal is sent to the blade root pitch circle control tooling, including:

[0024] Determining, according to the expansion amount difference adjustment data, a magnitude relationship of the absolute values ​​of the expansion amount adjustment signals in the expansion amount difference adjustment data;

[0025] According to the order of the absolute values ​​of the telescopic adjustment signals from large to small, an adjustment sequence signal is generated and sent to the blade root pitch circle control tooling.

[0026] According to the blade root pitch circle control method of the embodiment of the present application, the adjusting data according to the telescopic amount difference is determined to adjust the adjustment range, and the adjustment range signal is sent to the blade root pitch circle control tooling, including:

[0027] According to the telescopic difference adjustment data, each telescopic adjustment signal is segmented to generate a segmented adjustment signal, and the segmented adjustment signal is sent to the blade root pitch circle control tooling.

[0028] According to the blade root pitch circle control method of the embodiment of the present application, segmenting each of the telescopic amount adjustment signals according to the telescopic amount difference adjustment data to generate a segmented adjustment signal includes:

[0029] Each expansion amount adjustment signal is segmented according to the expansion amount difference adjustment data and the temperature difference range to generate a segmented adjustment signal.

[0030] According to the blade root pitch circle control method of the embodiment of the present application, the adjustment sequence is determined according to the telescopic difference adjustment data, and the adjustment sequence signal is sent to the blade root pitch circle control tooling, including:

[0031] Based on the segmented adjustment signal, an adjustment sequence of each segment adjustment signal is determined, and an adjustment sequence signal is sent to the blade root pitch circle control tooling.

[0032] The blade root pitch circle control method according to the embodiment of the present application further includes: obtaining a temperature difference value of the blade root within a preset time;

[0033] determining a springback amount of the blade root based on the temperature difference value, wherein the springback amount is a shrinkage degree of the blade root after the blade root pitch circle control tooling is removed from the blade root;

[0034] A compensation rebound value is determined based on the rebound amount, and the compensation rebound value is sent to the blade root pitch circle control tooling. The compensation rebound value is a telescopic value of a target perfect circle when the blade root pitch circle control tooling is removed from the blade root and the blade root retracts.

[0035] The blade root pitch circle control tooling and blade root pitch circle control method of the embodiments of the present application are connected to the mounting frame through a telescopic component to support the position of the blade root pitch circle, thereby controlling the deformation of the blade root; the position sensor detects the change in the telescopic amount of the telescopic component and sends it to the control module, and the control module controls the telescopic component to act, thereby realizing automatic control of the blade root pitch circle, without the need for manual adjustment, thereby improving efficiency, and having high adjustment accuracy, thereby avoiding excessive human adjustment, which may cause quality problems such as blade root rebound after disassembly; at the same time, the blade root pitch circle can be controlled in real time through the telescopic component when the blade is undergoing large movements such as transportation and lifting, thereby offsetting the stress caused by external forces during large movements, causing blade root deformation, and improving the control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0037] Figure 1 An axonometric view of a blade root pitch circle control tooling according to some embodiments of the present application;

[0038] Figure 2 A front view of a blade root pitch circle control tooling according to some embodiments of the present application;

[0039] Figure 3 A left side view of a blade root pitch circle control tooling according to some embodiments of the present application;

[0040] Figure 4 A rear view of a blade root pitch circle control tooling according to some embodiments of the present application;

[0041] Figure 5 One of the flowchart diagrams showing the blade root pitch circle control method of other embodiments of the present application;

[0042] Figure 6 A second flowchart diagram showing a blade root pitch circle control method according to other embodiments of the present application;

[0043] Figure 7 A third flowchart diagram showing a blade root pitch circle control method according to other embodiments of the present application;

[0044] Figure 8 A fourth flowchart diagram showing a blade root pitch circle control method according to other embodiments of the present application;

[0045] Fig. 9 FIG5 is a flowchart diagram of a blade root pitch circle control method according to other embodiments of the present application.

[0046] Reference numerals:

[0047] 100: mounting frame; 101: supporting ring; 102: back plate; 103: lifting ear; 104: fixing hole; 200: telescopic assembly; 201: telescopic member; 202: guiding mechanism; 400: control device; 410: position detector; 420: first pressure sensor; 430: second pressure sensor; 210: slider; 220: guide rail. DETAILED DESCRIPTION

[0048] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating the examples of the present application.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0050] The main material of wind turbine blades is glass fiber reinforced material (i.e. FRP), which has excellent lightness, flexibility and plasticity. However, the excellent material system also brings some tricky disadvantages. Due to the characteristics of FRP, the temperature difference during the production process, storage and transportation brings the problem of pitch circle control.

[0051] During the production process of wind turbine blades, the pitch circle of the blade root is easily deformed due to factors such as material properties, temperature changes, and production processes. Especially in northern regions, where the temperature difference is large in winter, the deformation problem is more prominent. Once the pitch circle of the blade root is deformed, subsequent maintenance work is not only time-consuming and labor-intensive, but also costly. This not only affects production efficiency, but also increases maintenance costs. At present, the pitch circle control of blades mainly relies on internal supports, and 2-3 people operate at the same time. On the one hand, it increases the labor intensity of operators. Secondly, the pitch circle accuracy cannot be guaranteed, and large supports rely on personnel to carry. The most important thing is that there is a great risk to product quality. Manual operation has a high safety risk, and safety accidents have also occurred. Misoperation can cause damage to the product, and also increase the cost of product and mold maintenance. Although there are a variety of equipment and technologies for wind turbine blade root deformation on the market, most of them combine mechanical mechanisms and manual operations, and have the following limitations:

[0052] 1) One-time installation: These technologies can usually only be installed once at the beginning of production, and cannot achieve real-time adjustment and control during the production process.

[0053] 2) Poor environmental adaptability: Under extreme temperature changes, such as the low temperature environment in northern winter, the deformation of the blade root may reach more than 20mm, and the existing control tooling may not be able to be disassembled due to deformation stress.

[0054] 3) Lack of flexibility: Existing technologies cannot be flexibly adjusted according to actual production conditions, resulting in an inability to effectively respond to unexpected problems that arise during the production process.

[0055] The present application uses a wind turbine blade root pitch circle control tooling to intelligently adjust the various matching mechanisms after the tooling is installed, collect and record precise data through real-time analysis, and adjust the pitch circle accuracy based on the real-time status to eliminate quality defects such as wind turbine blade root pitch circle deformation under special environmental conditions.

[0056] In order to solve the problems in the prior art, the embodiments of the present application provide a blade root pitch circle control tool and a blade root pitch circle control method. The blade root pitch circle control tool provided in the embodiments of the present application is first introduced below.

[0057] Figure 1 An axonometric view of a blade root pitch circle control tooling provided by some embodiments of the present application is shown.

[0058] like Figure 1 As shown, the present application provides a blade root pitch circle control tooling, comprising: a mounting frame 100, a telescopic assembly 200, a position detector 410 and a control module, the mounting frame 100 comprises a back plate 102 and a support ring 101, the support ring 101 is connected to the circumference of the back plate 102, and the back plate 102 can be connected to the blade root; the telescopic assembly 200 is arranged on the mounting frame 100 at equal angles along the radial direction of the back plate 102, the telescopic end of the telescopic assembly 200 is connected to the support ring 101, and the fixed end of the telescopic assembly 200 is connected to the back plate 102; the position detector 410 can detect the telescopic amount of the telescopic assembly 200; the control module is electrically connected to the telescopic assembly 200 and the position detector 410, and the control module controls the movement of the telescopic assembly 200 based on the telescopic amount to control the blade root pitch circle.

[0059] In order to better support the blade root pitch circle, the mounting frame 100 is cylindrical as a whole, matching the size of the blade root pitch circle, the back plate 102 is a disc structure, the support ring 101 is a closed annular shape, and the inner circle of the support ring 101 is connected to the outer circumference of the back plate 102, that is, the support ring 101 surrounds the back plate 102. The support ring 101 has a certain width. For example, the back plate 102 is installed in the middle of the support ring 101, and the width of the support ring 101 before and after the back plate 102 is consistent. The support ring 101 is set as a closed annular structure, and the back plate 102 is connected to the blade root. In the process of local deformation of the blade root pitch circle, the support ring 101 can even out the deformation force, avoid excessive local force, and cause excessive local deformation of the blade root, which affects the quality of the wind turbine blade. Since the deformation level of the blade root is small, the telescopic range of the telescopic assembly 200 is less than or equal to 20 mm, and the mounting frame 100 has a certain elasticity to better adapt to the installation and adjustment of the blade root to avoid damage. One blade root pitch circle control tool is adapted to one type of blade root.

[0060] In order to achieve automatic and high-precision adjustment of the blade root pitch circle, on one side of the back plate 102, with the center of the back plate 102 as the center, multiple telescopic components 200 are arranged at equal angles, and the multiple telescopic components 200 are connected to the inner ring surface of the support ring 101 to obtain the deformation of each circumferential position of the support ring 101. The telescopic amount data of the telescopic component 200 is obtained by the position detector 410 arranged on the telescopic component 200, and the telescopic amount data is sent to the control module. The control module adjusts the telescopic amount of each telescopic component 200 after calculation, so that the blade root pitch circle is the target circle. The real-time, fast and accurate automatic adjustment of the blade root pitch circle is achieved to avoid the problems of large errors, low efficiency and inability to adjust in real time caused by manual adjustment. For example, the position detector 410 can be a position sensor, a displacement sensor, etc. The position detector 410 can be installed at the telescopic end of the telescopic component 200.

[0061] The blade root pitch circle control tooling of the present application can be used as a mold tooling. In the blade mold forming stage, the blade root pitch circle control tooling of the present application is connected to the blade root, and the extension of the telescopic component 200 is controlled by the control module to achieve support for the blade root. In the demoulding stage, the retraction of the telescopic component 200 is controlled by the control module to achieve rapid demoulding and improve the blade demoulding efficiency. The control module can control the retraction of the telescopic component 200 in stages to improve the demoulding quality. In addition, the traditional demoulding tooling cannot be installed at the blade root because it cannot be adjusted when the blade root is deformed. Therefore, an additional support device is required to open the blade root, and then the demoulding tooling is installed at the blade root. Then, the additional support device may cause excessive support to the blade and delamination, which is time-consuming, labor-intensive and inefficient. The present application can adjust the installation position of the back plate 102 through the telescopic component 200 to adapt to the installation point of the deformed blade root, so that the blade root pitch circle control tooling is installed at the blade root when the blade root is in a deformed state, with high installation efficiency and high adaptability, and reducing the time of exposure to spatial deformation of the root of a large wind turbine blade after demolding.

[0062] The blade root pitch circle control tooling of the present application further includes an operation panel, which is connected to the control module so as to adjust the telescopic amount of the telescopic assembly 200 in a customized manner.

[0063] Figure 2 A front view of a blade root pitch circle control tooling according to some embodiments of the present application is shown; Figure 3 A left side view of a blade root pitch circle control tooling according to some embodiments of the present application is shown; Figure 4 A rear view of a blade root pitch circle control tooling according to some embodiments of the present application is shown.

[0064] like Figures 2 to 4As shown, in one embodiment of the present application, the telescopic assembly 200 includes: a guiding mechanism 202 and a telescopic member 201, the guiding mechanism 202 includes a guide rail 220 and a slider 210, the guide rail 220 is arranged on the back plate 102 along the radial direction of the back plate 102, one end of the slider 210 abuts against the support ring 101, the slider 210 is fixed on the back plate 102, and the other end of the slider 210 fits in the guide rail 220; the telescopic member 201 is in the guide rail 220, the telescopic end of the telescopic member 201 is connected to the slider 210, and the fixed end of the telescopic member 201 is connected to the back plate 102.

[0065] Specifically, the guide mechanism 202 is used to guide the telescopic movement of the telescopic member 201. Therefore, the guide mechanism 202 is also arranged at equal angles with the center of the circle of the back plate 102 as the center, and the guide rail 220 is arranged parallel to the telescopic member 201. For example, the guide rail 220 includes a first guide plate and a second guide plate, the first guide plate and the second guide plate are placed on both sides of the telescopic member 201 and are parallel to the telescopic member 201. The first guide plate and the second guide plate are higher than the telescopic member 201, which can be used to protect the telescopic member 201, prevent the telescopic member 201 from bumping in a complex environment, and also reduce the dust pollution of the telescopic member 201 to a certain extent, thereby increasing the service life of the telescopic member 201.

[0066] On the one hand, the slider 210 cooperates with the guide rail 220 to provide guidance for the telescopic member 201, and on the other hand, the slider 210 increases the force-bearing area between the telescopic member 201 and the blade root, so that the force is more balanced. The slider 210 is arranged between the support ring 101 and the telescopic end of the telescopic member 201. The slider 210 is an L-shaped plate, including a first connecting plate and a second connecting plate arranged vertically. The first connecting plate is connected to the telescopic end of the telescopic member 201, and the second connecting plate is fitted with the back plate 102 and is opposite to the fixing hole 104 of the back plate 102. The fastener passes through the second connecting plate and the fixing hole 104 and is connected to the blade root. The slider 210 moves linearly along the guide rail 220 during the telescopic process of the telescopic member 201, that is, the slider 210 is placed between the first guide plate and the second guide plate. In addition, the position detector 410 can be installed on the side of the slider 210 relative to the telescopic member 201.

[0067] In order to prevent the slider 210 from being deflected due to a force perpendicular to the back plate 102 , the guide rail 220 is provided with a limiting edge, which is located above the slider 210 to limit the slider 210 .

[0068] Further, in a specific embodiment of the present application, the telescopic member 201 is a telescopic cylinder. For example, it can be an oil cylinder, a jack, etc. Of course, in other embodiments of the present application, the telescopic member 201 can also be a screw nut structure driven by a motor, a gear rack structure, etc.

[0069] Continue to refer Figure 3In some other embodiments of the present application, the blade root pitch circle control tooling also includes a first pressure sensor 420, which is installed at the telescopic end of the telescopic assembly 200. The first pressure sensor 420 obtains the deformation pressure of the blade root and sends the deformation pressure signal to the control module to control the supporting force of the telescopic assembly 200.

[0070] The first pressure sensor 420 is used to detect the pressure applied to the telescopic assembly 200 by the deformation of the blade root. The first pressure sensor 420 is provided with a pressure upper limit to avoid overpressure on the blade root caused by abnormal position sensor. When the pressure value obtained by the first pressure sensor 420 exceeds the pressure upper limit, the blade root pitch circle control tooling can be switched to manual control.

[0071] During the blade transfer and lifting process or when the control panel is manually operated, the first pressure sensor 420 obtains the deformation pressure of the blade root in real time. When the pressure detected by the first pressure sensor 420 changes, the control module controls the output supporting force of the telescopic cylinder based on the deformation pressure of the first pressure sensor 420. For example, when the deformation pressure increases, the supporting force of the telescopic assembly 200 is correspondingly enhanced to offset the stress caused by the external force, so that the telescopic amount remains unchanged and deformation of the blade root is avoided.

[0072] Continue to refer Figure 2 In some optional embodiments of the present application, the blade root pitch circle control tooling also includes a second pressure sensor 430, which is installed at the fixed end of the telescopic cylinder. The second pressure sensor 430 obtains the internal pressure of the telescopic cylinder and sends an internal pressure signal to the control module to issue an alarm signal.

[0073] The second pressure sensor 430 is used to detect the pressure of the hydraulic system where the telescopic cylinder is located, to avoid damage to the telescopic cylinder caused by abnormal pressure inside the hydraulic system. When the internal pressure detected by the second pressure sensor 430 is greater than the preset pressure, the control module will control the alarm system to send an alarm signal.

[0074] In some specific embodiments of the present application, the blade root pitch circle control tooling also includes a locking structure (not shown in the figure). When the pressure value detected by the first pressure sensor 420 is greater than or equal to the pressure threshold of the control module, the locking structure can lock the telescopic assembly 200 at a position with a specified telescopic amount.

[0075] For example, when the pressure value detected by the first pressure sensor 420 exceeds the pressure threshold (i.e., an abnormal state), the blade root pitch circle control tooling enters the manual mode, and after adjusting the telescopic assembly 200 to a suitable position, it is locked in the position by the locking structure. The locking structure can be locked by adding a hydraulic valve to control the hydraulic circuit.

[0076] Figure 5One of the flowchart diagrams of the blade root pitch circle control method according to other embodiments of the present application is shown.

[0077] like Figure 5 As shown, the present application provides a blade root pitch circle control method, including: steps S1 and S2.

[0078] S1: obtaining a current expansion and contraction signal of a blade root pitch circle control tooling, wherein the current expansion and contraction signal is the expansion and contraction of the blade root pitch circle control tooling caused by the force deformation of the blade root when the blade root pitch circle control tooling is installed at the blade root;

[0079] Specifically, the blade root pitch circle control tooling is installed at the blade root. Since the pitch circle of the blade root is deformed, the telescopic component 200 of the blade root pitch circle control tooling has a certain telescopic amount according to the deformation of the blade root pitch circle. The position detector 410 arranged on the blade root pitch circle control tooling obtains the current telescopic amount of the telescopic component 200 in real time, and sends the current telescopic amount signal to the control module.

[0080] S2: Obtain a telescopic amount adjustment signal according to the current telescopic amount signal and the telescopic amount threshold, and send the telescopic amount adjustment signal to the blade root pitch circle control tooling; wherein the telescopic amount threshold is the telescopic amount of the blade root pitch circle control tooling when the blade root is the target perfect circle.

[0081] The control module obtains the current telescopic amount signal sent by the position detector 410, and compares it with the telescopic amount threshold stored in the control module, obtains the difference between the current telescopic amount signal and the telescopic amount threshold, converts the difference into a telescopic amount adjustment signal of the telescopic component 200, and sends it to the telescopic component 200. The telescopic component 200 telescopes based on the telescopic amount adjustment signal so that the pitch circle of the blade root is the target pitch circle size. A blade root of a certain model has a certain telescopic amount threshold. For example, the control module stores the telescopic amount adjustment signal and draws it into a curve data graph for display and recording.

[0082] Among them, the telescopic amount adjustment signal includes an adjustment value and an adjustment direction. The adjustment value is the telescopic amount value that the telescopic component 200 needs to extend based on the current telescopic amount value in the current telescopic signal. The adjustment direction includes the extension and retraction of the telescopic component 200.

[0083] With respect to the real-time acquisition of the current expansion and contraction amount signal by the position detector 410, after the position detector 410 acquires the current expansion and contraction amount signal, when the position detector 410 receives the adjustment completion signal sent by the control component, the position detector 410 acquires the current expansion and contraction amount signal for the next time. During the transportation process of wind turbine blades, the blade root is deformed due to uneven force. According to the above steps S1 and S2, the real-time remote control of the blade root pitch circle is completed, which reduces the input of labor, improves the quality of blades, reduces the maintenance cost of blades, replaces traditional operations with machines, eliminates the safety risks of manual operations, improves the production efficiency of blades, increases production capacity, improves the working environment of staff, and promotes the improvement of life.

[0084] Figure 6 The second flowchart diagram shows the blade root pitch circle control method according to other embodiments of the present application.

[0085] like Figure 6 As shown, in order to better control the actions of multiple telescopic components 200 to achieve the best adjustment effect of the blade root pitch circle and reduce the impact on the quality of the blade root, in one embodiment of the present application, according to the current telescopic amount signal and the telescopic amount threshold in step S2 of the present application, a telescopic amount adjustment signal is obtained, and the telescopic amount adjustment signal is sent to the blade root pitch circle control tooling, including: steps S21 and S22.

[0086] S21: Obtaining expansion difference adjustment data according to the current expansion signal and the expansion threshold;

[0087] Specifically, each position detector 410 corresponds to a telescopic assembly 200, thereby obtaining a current telescopic amount signal. A model of wind turbine blade has a telescopic amount threshold, and multiple current telescopic amount signals are compared with a telescopic amount threshold to obtain a set of telescopic amount difference adjustment data, which includes multiple telescopic amount adjustment signals.

[0088] S22: According to the telescopic difference adjustment data, the adjustment sequence and adjustment range are determined, and the adjustment sequence signal and adjustment range signal are sent to the blade root pitch circle control tooling. The blade root pitch circle control tooling rhythmically feeds back to the telescopic assembly 200 according to the adjustment sequence and adjustment range to control the telescopic assembly 200 to move.

[0089] That is, the adjustment sequence of the multiple telescopic adjustment signals is confirmed, for example, a single telescopic assembly 200 is used to act in sequence; or the telescopic assemblies 200 are grouped, and each group of telescopic assemblies 200 is acted in sequence. Also, the adjustment range of each telescopic assembly 200 action is confirmed, for example, the equally divided telescopic amounts of the telescopic adjustment signals corresponding to each telescopic assembly 200 are used to act multiple times, or one telescopic adjustment signal is completed in one action.

[0090] Figure 7 A third flowchart diagram showing a blade root pitch circle control method according to other embodiments of the present application.

[0091] like Figure 7 As shown, in some embodiments of the present application, in step S22, the data is adjusted according to the telescopic difference, an adjustment sequence is determined, and an adjustment sequence signal is sent to the blade root pitch circle control tooling, including: steps S221 and S222.

[0092] S221: determining a positive difference group and a negative difference group according to the telescopic amount difference adjustment data, wherein the positive difference group is a data group in which the current telescopic amount signal is greater than the telescopic amount threshold, and the negative difference group is a data group in which the current telescopic amount signal is less than the telescopic amount threshold;

[0093] That is, among the telescopic amount difference adjustment data, the data that requires the telescopic component 200 to perform a retracting action adjustment is taken as positive difference data, and the data that requires the telescopic component 200 to perform an extending action adjustment is taken as negative difference data.

[0094] S222: Send the positive difference signal of the positive difference group and the negative difference signal of the negative difference group to the blade root pitch circle control tooling in sequence.

[0095] In other words, the control module first sends a signal to the blade root pitch circle control tooling, and the blade root pitch circle control tooling executes first. For example, the positive difference signal line of the positive difference group is sent to the blade root pitch circle control tooling, and the telescopic components 200 in the blade root pitch circle control tooling that need to be retracted are actuated. After all the telescopic components 200 that have retracted are actuated, the negative difference signal of the negative difference component is sent to the blade root pitch circle control tooling, so that the telescopic components 200 in the blade root pitch circle control tooling that need to be extended are actuated. Retracting first and then extending avoids excessive support of the blade root pitch circle, thereby ensuring the quality of the blade root and improving the control accuracy.

[0096] Figure 8 A fourth flowchart diagram showing a blade root pitch circle control method according to other embodiments of the present application.

[0097] like Figure 8 As shown, in some embodiments of the present application, the adjustment data is adjusted according to the telescopic difference in step S22, the adjustment sequence is determined, and the adjustment sequence signal is sent to the blade root pitch circle control tooling, including: steps S223 and S224.

[0098] S223: determining the magnitude relationship of the absolute values ​​of the stretch amount adjustment signals in the stretch amount difference adjustment data according to the stretch amount difference adjustment data;

[0099] That is, when the movement direction of the telescopic component 200 is ignored, the telescopic amount adjustment signals are arranged in a sequence from large to small or from small to large.

[0100] S224: Generate an adjustment sequence signal according to the order of the absolute values ​​of the telescopic adjustment signals from large to small and send it to the blade root pitch circle control tooling.

[0101] For example, based on the order of the absolute values ​​of the telescopic adjustment signals from large to small, the telescopic adjustment signal with the largest absolute value is sent to the corresponding telescopic component 200, so that the corresponding telescopic component 200 takes action first, and then among the remaining data, the telescopic adjustment signal with the largest absolute value is sent to the corresponding telescopic component 200, and then the absolute values ​​are sent from large to small in sequence to the corresponding telescopic component 200 for action.

[0102] In some embodiments of the present application, in order to achieve flexible adjustment and ensure blade quality, the adjustment range is determined according to the adjustment data of the telescopic difference in step S22, and the adjustment range signal is sent to the blade root pitch circle control tooling, including:

[0103] According to the expansion and contraction difference adjustment data, each expansion and contraction adjustment signal is segmented to generate a segmented adjustment signal, and the segmented adjustment signal is sent to the blade root pitch circle control tooling.

[0104] For example, each telescopic adjustment signal in the telescopic difference adjustment data is equally divided, and the generated segmented adjustment signal includes the adjustment times and the adjustment value, that is, the control module sends the first adjustment value to the telescopic component 200, and after the adjustment is completed, the control module sends the second adjustment value to the telescopic component 200, until the Nth time, each adjustment value is the same, so that the telescopic component 200 can achieve graded flexible adjustment to avoid one adjustment affecting the final shape of the blade root. Of course, the adjustment value each time can be the same or different.

[0105] The thermal expansion coefficient of the FRP used in the blades is different from that of traditional metals. This difference causes the material to expand or contract to different degrees when the temperature changes, thus affecting its dimensional stability. The uneven expansion or contraction caused by temperature changes will produce stress inside the FRP. These internal stresses may cause micro cracks or other forms of damage to the material. Due to the thermal expansion and contraction effects, the FRP will expand when the temperature rises and contract when the temperature drops.

[0106] In order to consider the influence of temperature difference on the blade root pitch of FRP, in an optional embodiment of the present application, the step of adjusting the data according to the expansion difference, segmenting each expansion adjustment signal, and generating a segmented adjustment signal includes:

[0107] According to the expansion amount difference adjustment data and the temperature difference range, each expansion amount adjustment signal is segmented to generate a segmented adjustment signal. In the control module, the temperature difference range can be pre-stored. When the temperature sensor in the control module detects the temperature of the blade, when the temperature difference within a certain period of time reaches the preset temperature difference range of the control module, the corresponding segmented adjustment signal is output. For example, the larger the temperature difference, the smaller the value in the segmented adjustment signal, that is, the smaller the expansion amount of the expansion assembly 200 adjusted in a single time, thereby avoiding irreversible damage to the blade root and improving the adjustment accuracy.

[0108] Furthermore, in order to improve the adjustment efficiency under the condition of ensuring flexible adjustment, in a specific embodiment of the present application, the adjustment sequence is determined according to the adjustment data of the telescopic difference in step S22, and the adjustment sequence signal is sent to the blade root pitch circle control tooling, including:

[0109] Based on the segmented adjustment signal, the adjustment sequence of each segment adjustment signal is determined, and the adjustment sequence signal is sent to the blade root pitch circle control tooling.

[0110] Specifically, the multiple segmented adjustment signals obtained by each telescoping adjustment signal are uniformly sorted. For example, the telescoping adjustment signal corresponding to the telescoping component 2001 includes the first segmented adjustment signal, the second segmented adjustment signal, and the third segmented adjustment signal; the telescoping adjustment signal corresponding to the telescoping component 2002 includes the fourth segmented adjustment signal and the fifth segmented adjustment signal; and the telescoping adjustment signal corresponding to the telescoping component 2003 includes the sixth segmented adjustment signal.

[0111] The adjustment sequence is determined to be the first action group, the second action group and the third action group, the first action group includes the first segment adjustment signal; the second action group includes the second segment adjustment signal and the fourth segment adjustment signal; the third action group includes the third segment adjustment signal, the fifth segment adjustment signal and the sixth segment adjustment signal. The signals in each action group are sent out at the same time, and the corresponding telescopic components 200 act at the same time.

[0112] Fig. 9 FIG5 is a flowchart diagram of a blade root pitch circle control method according to other embodiments of the present application.

[0113] In order to avoid the influence of springback on the blade root pitch circle, Fig. 9 As shown, in some embodiments of the present application, the blade root pitch circle control method further includes: steps S3 to S5.

[0114] S3: Obtain the temperature difference value of the blade root within a preset time;

[0115] S4: determining the springback amount of the blade root based on the temperature difference value, where the springback amount is the shrinkage degree of the blade root after the blade root pitch circle control tooling is removed from the blade root;

[0116] S5: Determine a compensation springback value based on the springback amount, and send the compensation springback value to the blade root pitch circle control tooling. The compensation springback value is the expansion and contraction value of the target perfect circle after the blade root is retracted by removing the blade root pitch circle control tooling from the blade root.

[0117] In other words, before disassembling the blade root pitch circle control tooling, the springback amount under the current temperature difference is determined based on the temperature difference change, so as to control the telescopic assembly 200 to extend by the excessive deformation amount to compensate for the springback and ensure high-precision control of the blade root.

[0118] For the control module of the present application, the control module is an automatic calculation and real-time detection calculation control system, which collects and outputs pulse signals in real time, inputs them into the PLC programmable controller for logical calculation, performs independent real-time calculations according to the PID intelligent calculation module, and controls the supply system output electrical signals according to the calculation results to achieve intelligent power output.

[0119] Working process:

[0120] A lifting lug 103 is provided on the mounting frame 100, and the lifting equipment lifts the blade root pitch circle control tooling to the designated position through the lifting lug 103. The blade root pitch circle control tooling is installed at the blade root position, and the telescopic oil cylinder is manually adjusted so that the fixing hole 104 corresponds to the hole position at the blade root position, and then installed by bolts. At this time, the blade root pitch circle control tooling is in a non-target perfect circle state.

[0121] The position detector 410 obtains the current telescopic amount signal of the current telescopic cylinder, and compares it with the telescopic amount threshold to obtain the telescopic amount difference adjustment data, such as -1mm, -2mm, -3mm. Determine the adjustment order: first adjust the -3mm with a relatively large difference, and perform graded flexible adjustment (i.e. determine the adjustment range). The corresponding telescopic cylinder first moves -1mm, and then only -1mm, -2mm, and -2mm are left. Then the telescopic cylinders corresponding to the two -2mm are moved -1mm. Finally, it becomes -1mm, -1mm, and -1mm. At this time, all telescopic cylinders move -1mm, so that the difference of all telescopic oil cylinders is zero, so that the blade root is driven by the telescopic cylinder of the blade root pitch circle control tooling to restore the target perfect circle.

[0122] During the transportation and lifting process, the first pressure sensor 420 obtains the pressure value in real time. When the pressure detected by the first pressure sensor 420 increases, the control module controls the output supporting force of the telescopic cylinder based on the pressure value of the first pressure sensor 420, thereby increasing the output supporting force accordingly, so that the telescopic amount remains unchanged and the deformation of the blade root is avoided.

[0123] When a local position is subjected to greater force during the production process, the position detector 410 obtains the variable value of the local position and calculates the variable, and obtains the deformation and rebound of the blade root through calculation based on the variable, pressure and temperature difference; the telescopic cylinder is extended by a first extension amount according to the deformation amount, and then the telescopic cylinder is further extended by a second extension amount based on the rebound amount, so that after this work is completed, the size and shape of the blade root are maintained in the target perfect circle state after the tooling is disassembled.

[0124] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A blade root pitch circle control tool, characterized in that: include: A mounting frame, the mounting frame comprising a back plate and a support ring, the support ring is connected around the circumference of the back plate, and the back plate can be connected to the blade root; A telescopic assembly, wherein the telescopic assembly is arranged on the mounting frame at equal angles along the radial direction of the back plate, the telescopic end of the telescopic assembly is connected to the support ring, and the fixed end of the telescopic assembly is connected to the back plate; A position detector capable of detecting the telescopic amount of the telescopic assembly; A control module is electrically connected to the telescopic assembly and the position detector, and the control module controls the movement of the telescopic assembly based on the telescopic amount to control the blade root pitch circle.

2. The blade root pitch circle control tooling according to claim 1, characterized in that: The telescopic assembly comprises: A guide mechanism, the guide mechanism comprising a guide rail and a slider, the guide rail being arranged on the back plate along the radial direction of the back plate, one end of the slider abutting against the support ring, the slider being fixed on the back plate, and the other end of the slider fitting in the guide rail; A telescopic member is disposed in the guide rail, a telescopic end of the telescopic member is connected to the slider, and a fixed end of the telescopic member is connected to the back plate.

3. The blade root pitch circle control tooling according to claim 2, characterized in that: The telescopic member is a telescopic cylinder.

4. The blade root pitch circle control tooling according to claim 1, characterized in that: It also includes a first pressure sensor, which is installed at the telescopic end of the telescopic assembly. The first pressure sensor obtains the deformation pressure of the blade root and sends the deformation pressure signal to the control module to control the supporting force of the telescopic assembly.

5. The blade root pitch circle control tooling according to claim 3, characterized in that: It also includes a second pressure sensor, which is installed at the fixed end of the telescopic cylinder. The second pressure sensor obtains the internal pressure of the telescopic cylinder and sends an internal pressure signal to the control module to issue an alarm signal.

6. The blade root pitch circle control tooling according to claim 4, characterized in that: It also includes a locking structure, which can lock the telescopic assembly at a position with a specified telescopic amount when the pressure value detected by the first pressure sensor is greater than or equal to a pressure threshold of the control module.

7. A blade root pitch circle control method, characterized in that: include: Acquire a current expansion and contraction amount signal of a blade root pitch circle control tooling, wherein the current expansion and contraction amount signal is the expansion and contraction amount of the blade root pitch circle control tooling generated when the blade root is installed at the blade root and the blade root is deformed by force; A telescopic amount adjustment signal is obtained according to the current telescopic amount signal and the telescopic amount threshold, and the telescopic amount adjustment signal is sent to the blade root pitch circle control tooling; wherein the telescopic amount threshold is the telescopic amount of the blade root pitch circle control tooling when the blade root is a target perfect circle.

8. The blade root pitch circle control method according to claim 7, characterized in that: The method of obtaining a telescopic amount adjustment signal according to the current telescopic amount signal and the telescopic amount threshold, and sending the telescopic amount adjustment signal to the blade root pitch circle control tooling includes: Obtaining expansion amount difference adjustment data according to the current expansion amount signal and the expansion amount threshold, wherein the expansion amount difference adjustment data includes a plurality of expansion amount adjustment signals; According to the telescopic difference adjustment data, an adjustment sequence and an adjustment range are determined, and an adjustment sequence signal and an adjustment range signal are sent to the blade root pitch circle control tooling.

9. The blade root pitch circle control method according to claim 8, characterized in that: The step of adjusting the data according to the telescopic difference, determining an adjustment sequence, and sending an adjustment sequence signal to the blade root pitch circle control tooling comprises: Determine a positive difference group and a negative difference group according to the stretch amount difference adjustment data, wherein the positive difference group is a data group in which the current stretch amount signal is greater than the stretch amount threshold, and the negative difference group is a data group in which the current stretch amount signal is less than the stretch amount threshold; The positive difference signal of the positive difference group and the negative difference signal of the negative difference group are sent to the blade root pitch circle control tooling in sequence.

10. The blade root pitch circle control method according to claim 8, characterized in that: The step of adjusting the data according to the telescopic difference, determining an adjustment sequence, and sending an adjustment sequence signal to the blade root pitch circle control tooling comprises: Determining, according to the expansion amount difference adjustment data, a magnitude relationship of the absolute values ​​of the expansion amount adjustment signals in the expansion amount difference adjustment data; According to the order of the absolute values ​​of the telescopic adjustment signals from large to small, an adjustment sequence signal is generated and sent to the blade root pitch circle control tooling.

11. The blade root pitch circle control method according to claim 8, characterized in that: The method of adjusting the data according to the telescopic difference, determining the adjustment range, and sending the adjustment range signal to the blade root pitch circle control tooling includes: According to the telescopic difference adjustment data, each telescopic adjustment signal is segmented to generate a segmented adjustment signal, and the segmented adjustment signal is sent to the blade root pitch circle control tooling.

12. The blade root pitch circle control method according to claim 11, characterized in that: The step of segmenting each of the expansion amount adjustment signals according to the expansion amount difference adjustment data to generate segmented adjustment signals comprises: Each expansion amount adjustment signal is segmented according to the expansion amount difference adjustment data and the temperature difference range to generate a segmented adjustment signal.

13. The blade root pitch circle control method according to claim 11, characterized in that: According to the telescopic difference adjustment data, an adjustment sequence is determined, and an adjustment sequence signal is sent to the blade root pitch circle control tooling, including: Based on the segmented adjustment signal, an adjustment sequence of each segment adjustment signal is determined, and an adjustment sequence signal is sent to the blade root pitch circle control tooling.

14. The blade root pitch circle control method according to any one of claims 7 to 10, characterized in that: Also includes: Get the temperature difference value of the blade root within the preset time; determining a springback amount of the blade root based on the temperature difference value, wherein the springback amount is a shrinkage degree of the blade root after the blade root pitch circle control tooling is removed from the blade root; A compensation rebound value is determined based on the rebound amount, and the compensation rebound value is sent to the blade root pitch circle control tooling. The compensation rebound value is a telescopic value of a target perfect circle when the blade root pitch circle control tooling is removed from the blade root and the blade root retracts.

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