Installation Method of Embedded Flange for Wind Turbine Blade

Abstract

The present application provides a method for installing a pre-embedded flange for a wind turbine blade, comprising placing the pre-embedded flange at a corresponding position of a blade mold; adjusting the position of the pre-embedded flange according to a first measured coordinate value of the target pitch circle hole center and a first theoretical coordinate value of the target pitch circle hole center; installing the support leg base and adjustment limit of the pre-embedded flange when the deviation between the first measured coordinate value and the first theoretical coordinate value is less than or equal to a first threshold value; adjusting the position of the support leg base and the adjustment limit according to the relative position of the inner plane of the pre-embedded flange relative to the blade mold and the relative position of the theoretical plane relative to the blade mold model, so that the deviation between the inner plane of the pre-embedded flange and the theoretical plane is less than or equal to a second threshold value. The embodiment of the present application uses the theoretical model as a reference for installation positioning, ensuring that the inner plane of the pre-embedded flange is on the same plane in the mold closing state, and also ensuring that the inner plane of the pre-embedded flange is perpendicular to the normal of the blade root, thereby ensuring the installation accuracy of the pre-embedded flange.

Description

Technical Field

[0001] The present application belongs to the technical field of wind turbine blade manufacturing, and in particular relates to a method for installing a pre-embedded flange of a wind turbine blade. Background Art

[0002] At present, wind turbine blades are mostly manufactured in one piece by pre-embedded flanges in the blade mold. The position and angle of the bolt sleeve and bolts at the root of the blade are directly determined by the pre-embedded flanges. Therefore, the installation accuracy of the pre-embedded flanges has a critical impact on the quality of wind turbine blades.

[0003] In the prior art, the installation of the embedded flange mostly only involves adjusting the overall flatness of the embedded flange to ensure that the embedded flanges on the windward side mold and the leeward side mold are aligned. In the mold closing state, the inner planes of the embedded flanges are on the same plane, and it is often impossible to ensure that the inner plane of the embedded flange is perpendicular to the normal of the blade root, making it difficult to ensure the installation accuracy of the embedded flange. Summary of the Invention

[0004] The purpose of this application is to provide a method for installing a pre-embedded flange of a fan blade, aiming to solve the technical problem in the prior art that it is difficult to ensure the installation accuracy of the pre-embedded flange.

[0005] The present invention provides a method for installing a pre-embedded flange on a fan blade, comprising:

[0006] Placing the embedded flange at a corresponding position of the blade mold so that the inner plane of the embedded flange fits in with the blade root end surface of the blade mold, wherein the embedded flange includes a plurality of pitch holes, each of which corresponds to a pitch hole center;

[0007] The position of the embedded flange is adjusted according to a first measured coordinate value of a target pitch circle hole center and a first theoretical coordinate value of the target pitch circle hole center, wherein the target pitch circle hole center is included in a plurality of the pitch circle hole centers, the first measured coordinate value is obtained by measuring with a laser tracker, and the first theoretical coordinate value is obtained by a preset theoretical model, the theoretical model is a model in which at least a theoretical plane of the embedded flange and a pitch circle hole center lattice are established on a blade mold model, the pitch circle hole center lattice includes a plurality of preset pitch circle hole centers, and the first theoretical coordinate value is a coordinate value corresponding to the preset pitch circle hole center;

[0008] When a deviation between the first measured coordinate value and the first theoretical coordinate value is less than or equal to a first threshold value, installing a leg base and an adjustment limit of the embedded flange, wherein the adjustment limit is used to adjust a distance between an inner plane of the embedded flange and the blade mold;

[0009] According to the relative position of the inner plane of the embedded flange relative to the blade mold, and the relative position of the theoretical plane relative to the blade mold model, the position of the support leg base and the adjustment limit are adjusted so that the deviation between the inner plane of the embedded flange and the theoretical plane is less than or equal to a second threshold value. The relative position of the inner plane of the embedded flange relative to the blade mold is measured by a laser tracker.

[0010] According to one aspect of the embodiments of the present application, after adjusting the position of the leg base and the adjustment limit, the method further includes:

[0011] adjusting the position of the leg base according to a first measured coordinate value of the target pitch circle hole center and a first theoretical coordinate value of the target pitch circle hole center so that a deviation between the first measured coordinate value and the first theoretical coordinate value is less than or equal to a third threshold value, wherein the first measured coordinate value is measured by a laser tracker;

[0012] According to the relative position of the inner plane of the embedded flange relative to the blade mold and the relative position of the theoretical plane relative to the blade mold model, the positions of the support leg base and the adjustment limit are adjusted so that the deviation between the inner plane of the embedded flange and the theoretical plane is less than or equal to a fourth threshold value, and the relative position of the inner plane of the embedded flange relative to the blade mold is measured by a laser tracker.

[0013] The third threshold is smaller than the first threshold, and the fourth threshold is smaller than the second threshold.

[0014] According to one aspect of the embodiments of the present application, after adjusting the position of the leg base and the adjustment limit, the method further includes:

[0015] According to each first distance and the corresponding theoretical distance, the positions of the leg base and the adjustment limit are adjusted so that the deviation between each first distance and the corresponding theoretical distance is less than or equal to a fifth threshold value,

[0016] The first distance is the distance between the center of the pitch hole and the cavity of the blade mold, and the first distance is measured by a laser tracker. The theoretical distance is the absolute value of the difference between the cavity radius of the blade mold and the radius of the pitch hole.

[0017] According to one aspect of the embodiment of the present application, a positioning hole center matrix of a pre-embedded flange is further established on the blade mold model, the positioning hole center matrix includes a plurality of preset positioning hole centers, the coordinate values corresponding to the preset positioning hole centers are second theoretical coordinate values, the pre-embedded flange includes a plurality of positioning holes, each of the positioning holes corresponds to a positioning hole center,

[0018] Before adjusting the position of the leg base and the limit adjustment, the method further includes:

[0019] According to the second measured coordinate value of each positioning hole center and the corresponding second theoretical coordinate value of the positioning hole center, the position of the leg base and the adjustment limit is adjusted so that the deviation between the second measured coordinate value and the second theoretical coordinate value is less than or equal to a sixth threshold value, and the second measured coordinate value is measured by a laser tracker.

[0020] According to one aspect of the embodiment of the present application, the blade mold includes a cavity surface,

[0021] Before adjusting the position of the embedded flange, the method further includes:

[0022] A plurality of positioning blocks are provided on the cavity surface to adjust the position of the blade mold according to the measurement result of the blade mold by a laser tracker and the blade mold model;

[0023] When the deviation between the blade mold and the blade mold model meets the preset first condition, the initial position of each positioning block relative to the blade mold is measured by a laser tracker, and the initial position is used to determine the first theoretical coordinate value and the relative position of the theoretical plane relative to the blade mold model.

[0024] According to one aspect of the embodiment of the present application, the blade mold further includes a blade root end face and a parting surface, and the blade mold model includes a preset blade root end face, a preset parting surface and a preset cavity surface.

[0025] The preset first condition includes: the deviation between the blade root end face and the preset blade root end face is less than or equal to the seventh threshold, the deviation between the parting surface and the preset parting surface is less than or equal to the eighth threshold, and the deviation between the cavity surface and the preset cavity surface is less than or equal to the ninth threshold.

[0026] According to one aspect of an embodiment of the present application, placing the embedded flange at a corresponding position of the blade mold so that the inner plane of the embedded flange is aligned with the root end surface of the blade mold includes:

[0027] The dimensional parameters of the embedded flange are obtained by measuring with a laser tracker;

[0028] When the deviation between the dimensional parameters of the embedded flange and the dimensional parameters of the embedded flange model meets the preset second condition, the embedded flange is placed at the corresponding position of the blade mold so that the inner plane of the embedded flange is in contact with the root end face of the blade mold. The dimensional parameters of the embedded flange model include at least the theoretical plane and the pitch circle hole center lattice of the embedded flange.

[0029] According to one aspect of the embodiment of the present application, the blade mold includes a blade root preform mold and a main mold, and the blade root preform mold and the main mold both include a parting surface and a blade root end surface.

[0030] After adjusting the position of the leg base and the adjustment limit, the method further includes:

[0031] Manufacturing a blade root preform according to the blade root preform mold and the embedded flange installed on the blade root preform mold;

[0032] placing the blade root preform in the cavity of the main mold, and detecting the fit between the blade root preform and the cavity of the main mold;

[0033] When the degree of fit between the blade root preform and the cavity of the main mold is less than a preset fit threshold, the parting surface and the blade root end surface are repaired so that the degree of fit between the blade root preform and the cavity of the main mold is greater than or equal to the preset fit threshold.

[0034] According to one aspect of the embodiment of the present application, the blade mold includes a leeward side mold.

[0035] After adjusting the position of the leg base and the adjustment limit, the method further includes:

[0036] In the mold opening state, the cavity surface of the leeward mold and the inner plane of the embedded flange installed on the leeward mold are measured by a laser tracker to obtain first data;

[0037] The first data is fitted into the theoretical model to detect an installation error of the embedded flange installed on the leeward mold relative to the cavity surface of the leeward mold.

[0038] According to one aspect of an embodiment of the present application, after detecting the installation error of the embedded flange installed on the leeward mold relative to the cavity surface of the leeward mold, the method further includes:

[0039] In a mold-closed state, the side surface of the target ball is brought into contact with the cavity surface of the blade mold, and the bottom of the target ball is brought into contact with the inner plane of the embedded flange. A scanning sampling operation is performed around the center of the blade root circle on the cavity surface to obtain second data.

[0040] The first data and the second data are fitted to detect the posture accuracy of the embedded flange in the mold closing state.

[0041] According to one aspect of the embodiment of the present application, after detecting the posture accuracy of the embedded flange in the mold closing state, the method further includes:

[0042] Fitting the second data into a fitting plane to obtain a target flatness of the inner plane of the embedded flange in a mold closing state, wherein the target flatness is the sum of the absolute values of the maximum deviation and the minimum deviation of the fitting plane;

[0043] According to the theoretical model, the deviation degree of the target flatness is detected.

[0044] The method for installing the embedded flange of a wind turbine blade provided in an embodiment of the present application can use a preset theoretical model as a reference for the installation positioning of the embedded flange. During the installation process, the relevant parameters of the embedded flange are measured in real time by a laser tracker, and the measured relevant parameters are matched with the theoretical model. By adjusting the position of the embedded flange, the first measured coordinate value of the center of the target pitch circle hole is matched with the corresponding first theoretical coordinate value. Then, by adjusting the support leg base and the adjustment limit of the embedded flange, the inner plane of the embedded flange is matched with the theoretical plane. This ensures that the inner plane of the embedded flange is on the same plane in the mold closing state, and also ensures that the inner plane of the embedded flange is perpendicular to the normal of the blade root, thereby ensuring the installation accuracy of the embedded flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 This is an assembly diagram of a pre-embedded flange on a blade mold in one embodiment of the present application;

[0047] Figure 2 This is a schematic diagram of the structure of a theoretical model in one embodiment of the present application;

[0048] Figure 3 This is a schematic structural diagram of a blade mold in one embodiment of the present application;

[0049] Figure 4 This is a schematic structural diagram of a pre-buried flange in one embodiment of the present application;

[0050] Figure 5 This is a schematic structural diagram of the embedded flange in a mold closing state in one embodiment of the present application.

[0051] The meanings of the marks in the figure are:

[0052] 11. Blade mold; 111. Blade root end face; 112. Cavity surface; 113. Parting surface; 12. Embedded flange; 121. Pitch circle hole; 122. Flange support leg; 123. Limit plate; 124. Support leg base; 125. Adjustment limit; 126. Positioning hole; 21. Theoretical model; 211. Blade mold model; 212. Theoretical plane; 213. Pitch circle hole center lattice; 214. Preset positioning hole center. DETAILED DESCRIPTION

[0053] The features and exemplary embodiments of various aspects of the present application will be described in detail below. Many specific details are disclosed in the detailed description below to provide a comprehensive understanding of the present application. However, it will be apparent to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples of the present application. The present application is by no means limited to any specific configuration and algorithm proposed below, but rather covers any modification, replacement, and improvement of elements, components, and algorithms without departing from the spirit of the present application. In the accompanying drawings and the following description, well-known structures and techniques are not shown to avoid unnecessary ambiguity in the present application.

[0054] In order to illustrate the technical solution described in this application, the following is a detailed description with reference to specific drawings and embodiments.

[0055] See also Figures 1 to 5 The present application provides a method for installing a pre-embedded flange on a fan blade, which may include:

[0056] The embedded flange 12 is placed at the corresponding position of the blade mold 11 so that the inner plane of the embedded flange 12 is in contact with the blade root end surface 111 of the blade mold 11. The embedded flange 12 includes a plurality of pitch holes 121, and each pitch hole 121 corresponds to a pitch hole center.

[0057] The position of the embedded flange 12 is adjusted according to the first measured coordinate value of the target pitch circle hole center and the first theoretical coordinate value of the target pitch circle hole center, wherein the target pitch circle hole center is included in the multiple pitch circle hole centers, the first measured coordinate value is obtained by measuring with a laser tracker, and the first theoretical coordinate value is obtained by a preset theoretical model 21. The theoretical model 21 is a model on a blade mold model 211, in which at least a theoretical plane 212 of the embedded flange 12 and a pitch circle hole center lattice 213 are established. The pitch circle hole center lattice 213 includes multiple preset pitch circle hole centers, and the first theoretical coordinate value is a coordinate value corresponding to the preset pitch circle hole center;

[0058] When the deviation between the first measured coordinate value and the first theoretical coordinate value is less than or equal to the first threshold value, the support leg base 124 and the adjustment limit 125 of the embedded flange 12 are installed. The adjustment limit 125 is used to adjust the distance between the inner plane of the embedded flange 12 and the blade mold 11;

[0059] According to the relative position of the inner plane of the embedded flange 12 relative to the blade mold 11, and the relative position of the theoretical plane 212 relative to the blade mold model 211, the position of the support leg base and the adjustment limit 125 are adjusted so that the deviation between the inner plane of the embedded flange 12 and the theoretical plane 212 is less than or equal to the second threshold value. The relative position of the inner plane of the embedded flange 12 relative to the blade mold 11 is measured by a laser tracker.

[0060] It is understandable that the blade mold 11 of a wind turbine blade may include a main mold and a blade root preform mold, wherein the main mold and the blade root preform may both include a leeward side (SS side) mold and a windward side (PS side) mold in a split state.

[0061] like Figure 1 、 Figure 5 As shown, both the SS surface mold and the PS surface mold of the main mold are installed with embedded flanges 12. When the mold is closed, the embedded flange 12 installed on the SS surface mold of the main mold and the embedded flange 12 installed on the PS surface mold of the main mold will be merged together.

[0062] Similarly, both the SS surface mold and the PS surface mold of the blade root preform mold are installed with embedded flanges 12. When the molds are closed, the embedded flange 12 installed on the SS surface mold of the blade root preform mold and the embedded flange 12 installed on the PS surface mold of the blade root preform mold will be merged together.

[0063] The blade root preform mold and the embedded flange 12 mounted on the blade root preform mold can be used to manufacture the blade root preform. The blade body can be manufactured using the main mold and the embedded flange 12 mounted on the main mold. The blade body and the blade root preform are then combined to form a complete wind turbine blade.

[0064] The method for installing the pre-embedded flange 12 is the same on the SS surface mold of the blade root preform mold, the PS surface mold of the blade root preform mold, the SS surface mold of the main mold, or the PS surface mold of the main mold. To better understand the method for installing the pre-embedded flange of a wind turbine blade provided in the embodiments of the present application, the example of installing the pre-embedded flange 12 on any mold can be used for explanation, for example, the example of installing the pre-embedded flange 12 on the SS surface mold of the blade root preform mold will be used for explanation.

[0065] like Figure 2As shown, in this embodiment of the present application, a theoretical model 21 is pre-established. This theoretical model 21 can be composed of a theoretical plane 212 of the embedded flange 12 and a pitch circle hole center lattice 213 established on a blade mold model 211. The pitch circle hole center lattice 213 includes multiple preset pitch circle hole centers, each corresponding to a first theoretical coordinate value. This theoretical model 21 can represent the installation standard of the embedded flange 12 on the blade mold 11.

[0066] like Figure 3 As shown, the blade mold 11 provided in the embodiment of the present application may include a blade root end surface 111 , a cavity surface 112 and a parting surface 113 .

[0067] like Figure 4 As shown, the embedded flange 12 provided in the embodiment of the present application can include multiple pitch holes 121, which can be used to install bolts, and each pitch hole 121 corresponds to a pitch hole center. The embedded flange 12 can also include multiple flange legs 122 and two side limit plates 123, wherein one end of the flange leg 122 can be provided with a leg base 124, and the limit plate 123 can be provided with an adjustment limit 125.

[0068] After the theoretical model 21 is established, the embedded flange 12 can be installed. The embedded flange 12 is placed at the corresponding position of the blade mold 11. Specifically, the embedded flange 12 can be hoisted onto the blade mold 11 with a sling so that the inner plane of the embedded flange 12 is aligned with the blade root end surface 111 of the blade model.

[0069] Any at least two pitch circle hole centers on the embedded flange 12 can be selected as target pitch circle hole centers, and the first measured coordinate values of the target pitch circle hole centers can be measured by a laser tracker, and the first measured coordinates can be matched with the first theoretical coordinate values corresponding to the target pitch circle hole centers.

[0070] The position of the embedded flange 12 can be adjusted so that the deviation between the first measured coordinate value and the first theoretical coordinate value is less than or equal to a first threshold value, where the first threshold value can be set according to an empirical value, for example, the first threshold value can be 1 mm.

[0071] Specifically, after the inner plane of the embedded flange 12 is fitted with the blade root end face 111 of the blade model, the flange legs 122 on both sides of the embedded flange 12 can be supported by a jack to fix the embedded flange 12, and then the position of the embedded flange 12 can be adjusted by adjusting the jack.

[0072] After adjusting the position of the embedded flange 12 until the deviation between the first measured coordinate value and the first theoretical coordinate value is less than or equal to the first threshold, the support leg base 124 and the adjustment limit 125 of the embedded flange 12 can be installed on the blade mold 11.

[0073] The leg base 124 can be used to adjust the position of the flange leg 122, thereby adjusting the position of the embedded flange 12 relative to the blade mold 11, and the adjustment limit 125 can be used to adjust the distance between the limit 125 plate 123 and the blade mold 11, thereby adjusting the distance between the inner plane of the embedded flange 12 and the blade mold 11.

[0074] After the support leg base 124 and the adjustment limit 125 are installed, the relative position of the inner plane of the embedded flange 12 relative to the blade mold 11 is measured by a laser tracker, and the relative position of the inner plane of the embedded flange 12 relative to the blade mold 11 is matched with the relative position of the theoretical plane 212 relative to the blade mold model 211.

[0075] Then, the position of the leg base 124 and the limit adjustment 125 can be adjusted so that the deviation between the inner plane of the embedded flange 12 and the theoretical plane 212 is less than or equal to the second threshold, where the second threshold can be set according to an empirical value, for example, the second threshold can be 1 mm.

[0076] Specifically, the leg base 124 and the adjustment limiter 125 can be welded to the blade mold 11 to secure the embedded flange 12. A slider and a gasket can be provided on the leg base 124, wherein the gasket thickness can be within the range of 2-3 mm. The flange leg 122 can be mounted on the slider and gasket. By adjusting the slider and gasket, the horizontal and vertical position of the embedded flange 12 relative to the blade root end face 111 can be adjusted.

[0077] The adjustment limit 125 may include an adjustment bolt, and the limit plate 123 may abut between the adjustment bolt and the blade root end face 111 . By tightening or loosening the adjustment bolt, the distance between the inner plane of the embedded flange 12 and the blade root end face 111 can be adjusted.

[0078] The wind turbine blade embedded flange installation method provided in the embodiment of the present application can use the preset theoretical model 21 as a reference for the installation positioning of the embedded flange 12. During the installation process, the relevant parameters of the embedded flange 12 are measured in real time by a laser tracker, and the measured relevant parameters are matched with the theoretical model 21. By adjusting the position of the embedded flange 12, the first measured coordinate value of the target pitch circle hole center is matched with the corresponding first theoretical coordinate value. Then, by adjusting the support leg base 124 and the adjustment limit 125 of the embedded flange 12, the inner plane of the embedded flange 12 is matched with the theoretical plane 212, ensuring that the inner plane of the embedded flange 12 is on the same plane in the mold closing state, and also ensuring that the inner plane of the embedded flange 12 is perpendicular to the normal of the blade root, thereby ensuring the installation accuracy of the embedded flange 12.

[0079] In some specific examples, taking the first threshold as 1mm as an example, the first measured coordinate value of the center of the pitch circle hole on both sides of the highest point of the embedded flange 12 can be measured by a laser tracker, and by adjusting the position of the embedded flange 12, the deviation between the first measured coordinate value of the center of the pitch circle hole on both sides of the highest point and the corresponding first theoretical coordinate value is less than or equal to 1mm.

[0080] The laser tracker can then be used to measure the first measured coordinate value of the pitch circle hole center at the lowest point of the embedded flange 12. By adjusting the position of the embedded flange 12, the deviation between the first measured coordinate value of the pitch circle hole center at the lowest point and the corresponding first theoretical coordinate value is less than or equal to 1 mm. The laser tracker can then be used to remeasure the first measured coordinate values of the other pitch circle hole centers. By adjusting the position of the embedded flange 12, the deviation between the first measured coordinate values of the other pitch circle hole centers and the corresponding first theoretical coordinate values is less than or equal to 1 mm.

[0081] In some specific examples, in order to ensure the installation accuracy of the support leg base 124 and the adjustment limit 125, when the support leg base 124 and the adjustment limit 125 are welded to the blade mold 11, they can be spot welded first, and then the two sides can be symmetrically welded at the same time to ensure consistent welding shrinkage.

[0082] In order to further improve the installation accuracy of the embedded flange 12, in one embodiment, after adjusting the position of the support leg base 124 and the limit 125, the fan blade embedded flange installation method may further include:

[0083] According to a first measured coordinate value of the target pitch circle hole center and a first theoretical coordinate value of the target pitch circle hole center, adjusting the position of the leg base 124 so that a deviation between the first measured coordinate value and the first theoretical coordinate value is less than or equal to a third threshold value, wherein the first measured coordinate value is measured by a laser tracker;

[0084] According to the relative position of the inner plane of the embedded flange 12 relative to the blade mold 11, and the relative position of the theoretical plane 212 relative to the blade mold model 211, the support leg base and the position of the adjustment limit are adjusted so that the deviation between the inner plane of the embedded flange 12 and the theoretical plane 212 is less than or equal to the fourth threshold. The relative position of the inner plane of the embedded flange 12 relative to the blade mold 11 is measured by a laser tracker.

[0085] The third threshold is smaller than the first threshold, and the fourth threshold is smaller than the second threshold.

[0086] In this embodiment, after adjusting the position of the support leg base and the adjustment limit 125 so that the deviation between the inner plane of the embedded flange 12 and the theoretical plane 212 is less than or equal to the second threshold, in order to further improve the installation accuracy, the first measured coordinate value of the center of the target pitch circle hole can be measured again by the laser tracker, and the first measured coordinate is matched with the first theoretical coordinate value corresponding to the center of the target pitch circle hole. By adjusting the position of the support leg base 124, the deviation between the first measured coordinate value and the first theoretical coordinate value is less than or equal to the third threshold, wherein the third threshold is less than the first threshold and can be set according to an empirical value. For example, the third threshold can be 0.5 mm.

[0087] Specifically, the slider of the leg base 124 can be adjusted so that the deviation between the first measured horizontal coordinate value and the first theoretical horizontal coordinate value is less than or equal to the third threshold value, and then the gasket of the leg base 124 can be adjusted so that the deviation between the first measured vertical coordinate value and the first theoretical vertical coordinate value is less than or equal to the third threshold value.

[0088] After the deviation between the first measured coordinate value and the first theoretical coordinate value is less than or equal to the third threshold, the relative position of the inner plane of the embedded flange 12 relative to the blade mold 11 can be measured again by the laser tracker, and the relative position of the inner plane of the embedded flange 12 relative to the blade mold 11 is matched with the relative position of the theoretical plane 212 relative to the blade mold model 211. By adjusting the position of the support leg base 124 and the adjustment limit 125, the deviation between the inner plane of the embedded flange 12 and the theoretical plane 212 is less than or equal to the fourth threshold, where the fourth threshold is less than the second threshold and can be set according to an empirical value. For example, the fourth threshold can be 0.5 mm.

[0089] In some specific examples, taking the third threshold value of 0.5 mm as an example, the first measured coordinate value of the center of the pitch circle hole on both sides of the highest point of the embedded flange 12 can be measured by a laser tracker, and the slider of the support leg base 124 can be used to make the deviation between the first measured horizontal coordinate value of the center of the pitch circle hole on both sides of the highest point of the embedded flange 12 and the corresponding first theoretical horizontal coordinate value less than or equal to 0.5 mm, and then the gasket of the support leg base 124 can be adjusted to make the deviation between the first measured vertical coordinate value of the center of the pitch circle hole on both sides of the highest point of the embedded flange 12 and the corresponding first theoretical vertical coordinate value less than or equal to 0.5 mm.

[0090] In order to ensure the fixing strength of subsequent bolts, in one embodiment, after adjusting the position of the leg base 124 and the position of the limiter 125, the fan blade embedded flange installation method may further include:

[0091] According to each first distance and the corresponding theoretical distance, the positions of the leg base 124 and the adjustment limit 125 are adjusted so that the deviation of each first distance and the corresponding theoretical distance is less than or equal to the fifth threshold value.

[0092] The first distance is the distance between the center of the pitch hole and the cavity of the blade mold 11 , which is measured by a laser tracker. The theoretical distance is the absolute value of the difference between the radius of the cavity of the blade mold 11 and the radius of the pitch hole 121 .

[0093] In this embodiment, the first distance between the center of each pitch circle hole and the cavity of the blade mold 11 can also be measured by a laser tracker, and each first distance can be matched with the corresponding theoretical distance. By adjusting the position of the support leg base 124 and the adjustment limit 125, the deviation between each first distance and the corresponding theoretical distance can be less than or equal to the fifth threshold value, where the fifth threshold value can be set according to an empirical value, for example, the fifth threshold value can be 1 mm.

[0094] The theoretical distance can be the absolute value of the difference between the radius of the blade mold 11 cavity and the radius of the pitch hole 121. Specifically, the cross-section of the cavity at the root of the blade mold 11 is circular, which can be described as the blade root circle. The radius of the blade mold 11 cavity can be the radius of the blade root circle. For example, if the blade root circle radius is 1000 mm and the pitch hole 121 radius is 30 mm, the theoretical distance can be 970 mm.

[0095] By matching each first distance with the corresponding theoretical distance, this embodiment further ensures the flatness and posture accuracy of the embedded flange 12 after mold closing. Furthermore, matching each first distance with the corresponding theoretical distance also ensures the positioning accuracy of subsequent bolts, avoiding uneven distribution of bolt positions, thereby preventing uneven force on the fan blades and directly affecting fan blade quality.

[0096] In order to ensure the posture accuracy of the embedded flange 12 after mold closing, in one embodiment, a positioning hole center dot matrix of the embedded flange 12 is also established on the blade mold model 211. The positioning hole center dot matrix can include multiple preset positioning hole centers 214. The coordinate values corresponding to the preset positioning hole centers 214 are the second theoretical coordinate values. The embedded flange 12 includes multiple positioning holes 126. Each positioning hole 126 corresponds to a positioning hole center.

[0097] Before adjusting the position of the leg base 124 and the position of the limiter 125, the fan blade embedded flange installation method may further include:

[0098] According to the second measured coordinate value of each positioning hole center and the corresponding second theoretical coordinate value of the positioning hole center, the position of the leg base 124 and the adjustment limit 125 are adjusted so that the deviation between the second measured coordinate value and the second theoretical coordinate value is less than or equal to the sixth threshold value. The second measured coordinate value is obtained by measuring with a laser tracker.

[0099] In this embodiment, the embedded flange 12 may include a plurality of positioning holes 126, each positioning hole 126 corresponding to a positioning hole center, for example Figure 4 、 Figure 5 As shown, the embedded flange 12 includes two positioning holes 126, and the positioning holes 126 can be installed with positioning pins for mold closing positioning.

[0100] like Figure 2 As shown, corresponding to the two positioning holes 126 on the embedded flange 12, a positioning hole center matrix of the embedded flange 12 is also established on the blade mold model 211. The positioning hole center matrix can include two preset positioning hole centers 214, and each preset positioning hole center 214 corresponds to a second theoretical coordinate value.

[0101] A second measured coordinate value of the positioning hole center can be measured using a laser tracker and matched with the corresponding second theoretical coordinate value. The position of the leg base 124 and the adjustment limit 125 can be adjusted so that the deviation between the second measured coordinate value and the second theoretical coordinate value is less than or equal to a sixth threshold value, where the sixth threshold value can be set based on experience, for example, 0.5 mm.

[0102] To ensure a more accurate reference to the theoretical model 21, in one embodiment, the blade mold 11 may include a cavity surface 112. Before adjusting the position of the embedded flange 12, the wind turbine blade embedded flange installation method may further include:

[0103] A plurality of positioning blocks are provided on the cavity surface 112 to adjust the position of the blade mold 11 according to the measurement result of the blade mold 11 by the laser tracker and the blade mold model 211;

[0104] When the deviation between the blade mold 11 and the blade mold model 211 meets the preset first condition, the initial position of each positioning block relative to the blade mold 11 is measured by a laser tracker. The initial position is used to determine the first theoretical coordinate value and the relative position of the theoretical plane 212 relative to the blade mold model 211.

[0105] In this embodiment, positioning blocks may be provided on the cavity surface 112 . Specifically, the positioning blocks may be provided on both sides of the cavity surface 112 in a detachable manner, for example, by gluing.

[0106] The positioning blocks can be made of through-hole cylinders, the inner hole diameter of the positioning blocks can be 8-16 mm, the number of positioning blocks can be 8-12, the positioning blocks are arranged on both sides of the cavity surface 112, and the positioning blocks can be at an angle of 30-45 degrees to the cavity surface 112 to ensure that the positioning blocks can play a role in locating the position of the blade mold 11.

[0107] The blade mold 11 is measured by a laser tracker, and the measurement result is matched with the blade mold model 211, and the position of the blade mold 11 is adjusted so that the deviation between the blade mold 11 and the blade mold model 211 meets the preset first condition.

[0108] In a specific embodiment, the blade mold 11 may further include a blade root end surface 111 and a parting surface 113, and the blade mold model 211 may include a preset blade root end surface 111, a preset parting surface 113 and a preset cavity surface 112.

[0109] The preset first condition can be that the deviation between the blade root end face 111 and the preset blade root end face 111 is less than or equal to the seventh threshold, the deviation between the parting surface 113 and the preset parting surface 113 is less than or equal to the eighth threshold, and the deviation between the cavity surface 112 and the preset cavity surface 112 is less than or equal to the ninth threshold.

[0110] The seventh threshold, the eighth threshold, and the ninth threshold may be set according to empirical values. For example, the seventh threshold may be 2 mm, the eighth threshold may be 2 mm, and the ninth threshold may be 1 mm.

[0111] After the deviation between the blade mold 11 and the blade mold model 211 satisfies a preset first condition, the initial position of each positioning block relative to the blade mold 11 may be measured by a laser tracker.

[0112] It is understandable that during the installation of the embedded flange 12, a laser tracker needs to be set inside the blade mold 11 to measure the relevant parameters of the embedded flange 12 in real time and detect the installation position of the embedded flange 12. At this time, due to the position of the laser tracker, the position of the blade mold 11 may be measured.

[0113] In this embodiment, during the installation of the embedded flange 12, the position of the blade mold 11 can be determined by measuring the measured position of the positioning block and then matching it with the initial position. The position of the blade mold 11 is imported into the theoretical model 21 to determine the first theoretical coordinate value and the relative position of the theoretical plane 212 with respect to the blade mold model 211, which can be used as a reference during the installation of the embedded flange 12.

[0114] In one embodiment, placing the embedded flange 12 at a corresponding position of the blade mold 11 so that the inner plane of the embedded flange 12 is aligned with the blade root end surface 111 of the blade mold 11 may include:

[0115] The dimensional parameters of the embedded flange 12 are measured by a laser tracker;

[0116] When the deviation between the dimensional parameters of the embedded flange 12 and the dimensional parameters of the embedded flange 12 model meets the preset second condition, the embedded flange 12 is placed at the corresponding position of the blade mold 11 so that the inner plane of the embedded flange 12 is in contact with the blade root end face 111 of the blade mold 11. The dimensional parameters of the embedded flange 12 model include at least the theoretical plane 212 and the pitch circle hole center lattice 213 of the embedded flange 12.

[0117] Before installing the embedded flange 12 , a laser tracker may be used to detect whether the size parameters of the embedded flange 12 meet the installation requirements, so as to ensure the subsequent installation accuracy of the embedded flange 12 .

[0118] The dimensional parameters of the embedded flange 12 model may include the theoretical plane 212 of the embedded flange 12, the position accuracy of the preset pitch circle hole center, the preset diameter, and the position accuracy of the preset positioning hole center 214. Correspondingly, the inner plane, pitch circle hole center position accuracy, diameter, and positioning hole center position accuracy of the embedded flange 12 can be measured using a laser tracker.

[0119] The dimensional parameters of the embedded flange 12 are matched with the dimensional parameters of the embedded flange 12 model. When the deviation between the dimensional parameters of the embedded flange 12 and the dimensional parameters of the embedded flange 12 model meets the preset second condition, it is determined that the embedded flange 12 meets the installation requirements.

[0120] To facilitate understanding, a specific scenario example can be used for illustration.

[0121] The inner plane of the embedded flange 12 is measured by a laser tracker, and the deviation between the flatness of the inner plane and the flatness of the theoretical plane 212 is required to be less than or equal to 0.5mm; the position of the center of the pitch circle hole of the embedded flange 12 is measured by a laser tracker, and the deviation between the center of the pitch circle hole and the preset center of the pitch circle hole is required to be less than or equal to 0.5mm; the position of the center of the positioning hole of the embedded flange 12 is measured by a laser tracker, and the deviation between the center of the positioning hole and the preset center of the positioning hole 214 is required to be less than or equal to 0.3mm; the diameter of the embedded flange 12 is measured by a laser tracker, and the deviation between the diameter and the preset diameter is required to be less than or equal to 0.2mm.

[0122] In some examples, the dimensional parameters of the embedded flange 12 model may also include the coaxiality of the flange leg 122 hole, the flatness of the limit plate 123, etc.

[0123] In one embodiment, the blade mold 11 may include a blade root preform mold and a main mold, and both the blade root preform mold and the main mold may include a parting surface 113 and a blade root end surface 111.

[0124] After adjusting the position of the leg base 124 and the position of the limiter 125, the fan blade embedded flange installation method may further include:

[0125] According to the blade root preform mold and the embedded flange 12 installed on the blade root preform mold, a blade root preform is manufactured;

[0126] Place the blade root preform in the cavity of the main mold and check the fit between the blade root preform and the cavity of the main mold;

[0127] When the degree of fit between the blade root preform and the cavity of the main mold is less than a preset fit threshold, the parting surface 113 and the blade root end surface 111 are repaired to make the degree of fit between the blade root preform and the cavity of the main mold greater than or equal to the preset fit threshold.

[0128] In this embodiment, after the pre-set flange of the blade root preform mold is installed, a set of blade root preforms is produced. The blade root preforms are then placed in the cavities of the main mold. Specifically, the blade root preforms are hoisted into the cavities of the PS and SS surface molds of the main mold, respectively, to check the fit of the blade root preforms within the cavities.

[0129] If the blade root preform does not fit tightly against the mold cavity, it indicates that there is a deviation between the blade root end face 111 and the parting surface 113 of the blade mold 11. The parting surface 113 and the blade root end face 111 can be repaired to make the blade root preform fit tightly against the mold cavity of the main mold.

[0130] In this embodiment, a set of blade root preforms is manufactured to match the cavity of the main mold, and the fit between the blade root preforms and the cavity of the main mold is tested so that the parting surface 113 and the blade root end surface 111 can be repaired in time, effectively avoiding batch quality problems.

[0131] In one embodiment, the blade mold 11 may include a leeward mold,

[0132] After adjusting the position of the leg base 124 and the position of the limiter 125, the fan blade embedded flange installation method may further include:

[0133] In the mold open state, the cavity surface 112 of the leeward mold and the inner plane of the embedded flange 12 installed on the leeward mold are measured by a laser tracker to obtain first data;

[0134] The first data is fitted into the theoretical model 21 to detect the installation error of the embedded flange 12 installed on the leeward mold relative to the cavity surface 112 of the leeward mold.

[0135] In this embodiment, after the embedded flange 12 is installed, in the mold open state, the cavity surface 112 of the SS surface mold 0-15m and the inner plane of the embedded flange 12 installed on the SS surface mold are measured by a laser tracker to obtain first data, and the first data is fitted into the theoretical model 21 to check the fitting deviation result of the inner plane of the embedded flange 12. The fitting deviation result can characterize the installation position error of the embedded flange 12 relative to the cavity surface 112.

[0136] It is understandable that the same method can also be used to detect the installation error of the embedded flange 12 relative to the cavity surface 112 of the PS surface mold and the embedded flange 12 installed on the PS surface mold.

[0137] In one embodiment, after detecting the installation error of the embedded flange 12 installed on the leeward side mold relative to the cavity surface 112 of the leeward side mold, the wind turbine blade embedded flange installation method may further include:

[0138] In the mold-closed state, the side of the target ball is brought into contact with the cavity surface 112 of the blade mold 11, and the bottom of the target ball is brought into contact with the inner plane of the embedded flange 12. The cavity surface 112 is scanned and sampled around the center of the blade root circle to obtain the second data.

[0139] The first data and the second data are fitted to detect the posture accuracy of the embedded flange 12 in the mold closing state.

[0140] In this embodiment, the cavity surface 112 may be the cavity surface 112 at the blade root. The target sphere scans and samples the cavity surface 112 around the center of the blade root circle to obtain second data. After radially and axially compensating the target sphere radius, this second data can be used to obtain the blade root circle profile of the inner plane of the embedded flange 12. After fitting the circumference, a blade root circle coordinate system can be established based on the plane of the circumference to obtain the coordinate value of the blade root circle center.

[0141] After fitting the first data and the second data, the position of the inner plane of the embedded flange 12 in the first data can be matched with the circumference of the blade root circle contour fitting, so that the posture accuracy of the embedded flange 12 in the mold closing state can be detected based on the matching result.

[0142] In one embodiment, after detecting the posture accuracy of the embedded flange 12 in the mold closing state, the fan blade embedded flange installation method may further include:

[0143] Fitting the second data into a fitting plane to obtain a target flatness of the inner plane of the embedded flange 12 in the mold closing state, where the target flatness is the sum of the absolute values of the maximum deviation and the minimum deviation of the fitting plane;

[0144] According to the theoretical model 21, the degree of deviation from the target flatness is detected.

[0145] In this embodiment, based on the blade root circle coordinate system established above, the second data is fitted into a fitting plane. The sum of the absolute values of the maximum and minimum deviations is used as the target flatness of the inner plane of the embedded flange 12 in the mold-closed state. The target flatness can be matched with the theoretical model 21 to determine the degree of deviation from the target flatness.

[0146] In this embodiment, the installation accuracy of the embedded flange 12 at the blade root can be standardized using the fitting results of the first data. The overall posture accuracy of the embedded flange 12 after mold closing can then be standardized based on the fitting results of the first and second data. Simultaneously, a corresponding blade root circle coordinate system is generated. The second data is then fitted to a fitting plane based on this blade root circle coordinate system. The deviation of the target flatness of the fitted plane is then used to characterize the deviation of the inner plane of the embedded flange 12.

[0147] This embodiment tests the installation of the embedded flange 12. The flatness of the inner surface of the embedded flange 12 is measured relative to the cavity of the blade mold 11, resulting in higher accuracy. In the prior art, the deviation error of the inner surface of the embedded flange 12 is typically less than 2 mm. However, in this embodiment, the deviation error can be reduced to less than 1 mm, achieving even higher accuracy.

[0148] Those skilled in the art should understand that the above embodiments are exemplary rather than restrictive. Different technical features appearing in different embodiments can be combined to achieve beneficial effects. Based on a study of the drawings, specifications and claims, those skilled in the art should be able to understand and implement other variations of the disclosed embodiments. In the claims, the term "comprising" does not exclude other devices or steps; when an item is not modified by a quantifier, it is intended to include one / kind or more / kinds of items and can be used interchangeably with "one / kind or more / kinds of items"; the terms "first" and "second" are used to identify names rather than to indicate any specific order. Any figure marks in the claims should not be understood as limiting the scope of protection. The functions of multiple parts appearing in the claims can be implemented by a separate hardware or software module. The fact that certain technical features appear in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A method for installing a pre-embedded flange on a fan blade, comprising: Placing the embedded flange at a corresponding position of the blade mold so that the inner plane of the embedded flange fits in with the blade root end surface of the blade mold, wherein the embedded flange includes a plurality of pitch holes, each of which corresponds to a pitch hole center; The position of the embedded flange is adjusted according to a first measured coordinate value of a target pitch circle hole center and a first theoretical coordinate value of the target pitch circle hole center, wherein the target pitch circle hole center is included in a plurality of the pitch circle hole centers, the first measured coordinate value is obtained by measuring with a laser tracker, and the first theoretical coordinate value is obtained by a preset theoretical model, the theoretical model is a model in which at least a theoretical plane of the embedded flange and a pitch circle hole center lattice are established on a blade mold model, the pitch circle hole center lattice includes a plurality of preset pitch circle hole centers, and the first theoretical coordinate value is a coordinate value corresponding to the preset pitch circle hole center; When a deviation between the first measured coordinate value and the first theoretical coordinate value is less than or equal to a first threshold value, installing a leg base and an adjustment limit of the embedded flange, wherein the adjustment limit is used to adjust a distance between an inner plane of the embedded flange and the blade mold; According to the relative position of the inner plane of the embedded flange relative to the blade mold, and the relative position of the theoretical plane relative to the blade mold model, the position of the support leg base and the adjustment limit are adjusted so that the deviation between the inner plane of the embedded flange and the theoretical plane is less than or equal to a second threshold value. The relative position of the inner plane of the embedded flange relative to the blade mold is measured by a laser tracker.

2. The method according to claim 1, wherein After adjusting the position of the leg base and the adjustment limit, the method further includes: adjusting the position of the leg base according to a first measured coordinate value of the target pitch circle hole center and a first theoretical coordinate value of the target pitch circle hole center so that a deviation between the first measured coordinate value and the first theoretical coordinate value is less than or equal to a third threshold value, wherein the first measured coordinate value is measured by a laser tracker; According to the relative position of the inner plane of the embedded flange relative to the blade mold and the relative position of the theoretical plane relative to the blade mold model, the positions of the support leg base and the adjustment limit are adjusted so that the deviation between the inner plane of the embedded flange and the theoretical plane is less than or equal to a fourth threshold value, and the relative position of the inner plane of the embedded flange relative to the blade mold is measured by a laser tracker. The third threshold is smaller than the first threshold, and the fourth threshold is smaller than the second threshold.

3. The method according to claim 1, wherein After adjusting the position of the leg base and the adjustment limit, the method further includes: According to each first distance and the corresponding theoretical distance, the positions of the leg base and the adjustment limit are adjusted so that the deviation between each first distance and the corresponding theoretical distance is less than or equal to a fifth threshold value, The first distance is the distance between the center of the pitch hole and the cavity of the blade mold, and the first distance is measured by a laser tracker. The theoretical distance is the absolute value of the difference between the cavity radius of the blade mold and the radius of the pitch hole.

4. The method according to claim 2, wherein: A positioning hole center matrix of a pre-embedded flange is also established on the blade mold model. The positioning hole center matrix includes a plurality of preset positioning hole centers. The coordinate values corresponding to the preset positioning hole centers are second theoretical coordinate values. The pre-embedded flange includes a plurality of positioning holes, and each positioning hole corresponds to a positioning hole center. Before adjusting the position of the leg base and the limit adjustment, the method further includes: According to the second measured coordinate value of each positioning hole center and the corresponding second theoretical coordinate value of the positioning hole center, the position of the leg base and the adjustment limit is adjusted so that the deviation between the second measured coordinate value and the second theoretical coordinate value is less than or equal to a sixth threshold value, and the second measured coordinate value is measured by a laser tracker.

5. The method according to claim 1, wherein The blade mold includes a cavity surface, Before adjusting the position of the embedded flange, the method further includes: A plurality of positioning blocks are provided on the cavity surface to adjust the position of the blade mold according to the measurement result of the blade mold by a laser tracker and the blade mold model; When the deviation between the blade mold and the blade mold model meets the preset first condition, the initial position of each positioning block relative to the blade mold is measured by a laser tracker, and the initial position is used to determine the first theoretical coordinate value and the relative position of the theoretical plane relative to the blade mold model.

6. The method according to claim 5, wherein: The blade mold further includes a blade root end face and a parting surface, and the blade mold model includes a preset blade root end face, a preset parting surface and a preset cavity surface. The preset first condition includes: the deviation between the blade root end face and the preset blade root end face is less than or equal to the seventh threshold, the deviation between the parting surface and the preset parting surface is less than or equal to the eighth threshold, and the deviation between the cavity surface and the preset cavity surface is less than or equal to the ninth threshold.

7. The method according to claim 1, wherein Placing the embedded flange at a corresponding position of the blade mold so that the inner plane of the embedded flange fits with the blade root end surface of the blade mold includes: The dimensional parameters of the embedded flange are obtained by measuring with a laser tracker; When the deviation between the dimensional parameters of the embedded flange and the dimensional parameters of the embedded flange model meets the preset second condition, the embedded flange is placed at the corresponding position of the blade mold so that the inner plane of the embedded flange is in contact with the root end face of the blade mold. The dimensional parameters of the embedded flange model include at least the theoretical plane and the pitch circle hole center lattice of the embedded flange.

8. The method according to claim 1, wherein The blade mold includes a blade root preform mold and a main mold, and both the blade root preform mold and the main mold include a parting surface and a blade root end surface. After adjusting the position of the leg base and the adjustment limit, the method further includes: Manufacturing a blade root preform according to the blade root preform mold and the embedded flange installed on the blade root preform mold; placing the blade root preform in the cavity of the main mold, and detecting the fit between the blade root preform and the cavity of the main mold; When the degree of fit between the blade root preform and the cavity of the main mold is less than a preset fit threshold, the parting surface and the blade root end surface are repaired so that the degree of fit between the blade root preform and the cavity of the main mold is greater than or equal to the preset fit threshold.

9. The method according to claim 1, wherein The blade mold includes a leeward side mold, After adjusting the position of the leg base and the adjustment limit, the method further includes: In the mold opening state, the cavity surface of the leeward mold and the inner plane of the embedded flange installed on the leeward mold are measured by a laser tracker to obtain first data; The first data is fitted into the theoretical model to detect an installation error of the embedded flange installed on the leeward mold relative to the cavity surface of the leeward mold.

10. The method according to claim 9, wherein: After detecting the installation error of the embedded flange installed on the leeward mold relative to the cavity surface of the leeward mold, the method further includes: In a mold-closed state, the side surface of the target ball is brought into contact with the cavity surface of the blade mold, and the bottom of the target ball is brought into contact with the inner plane of the embedded flange. A scanning sampling operation is performed around the center of the blade root circle on the cavity surface to obtain second data. The first data and the second data are fitted to detect the posture accuracy of the embedded flange in the mold closing state.

11. The method according to claim 10, wherein: After detecting the posture accuracy of the embedded flange in the mold closing state, the method further includes: Fitting the second data into a fitting plane to obtain a target flatness of the inner plane of the embedded flange in a mold closing state, wherein the target flatness is the sum of the absolute values of the maximum deviation and the minimum deviation of the fitting plane; According to the theoretical model, the deviation degree of the target flatness is detected.

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