A blade profile generation method, a blade model generation method, a device and equipment

Abstract

The present application relates to the field of data measurement, and discloses a blade profile generation method, a blade model generation method, a device and equipment, the method comprising: pasting a first auxiliary measurement sheet body of a first preset thickness at a target blade external corner fillet, the first auxiliary measurement sheet body being a sheet body that is not light-transmitting and has a matte surface; optically scanning the external corner fillet profile of the outer surface of the first auxiliary measurement sheet body to generate an external corner fillet curve; and offsetting the external corner fillet curve by the first preset thickness to obtain a first profile corresponding to the target blade external corner fillet, the present application pastes an auxiliary measurement sheet body at an external corner fillet with large blade curvature, enlarges the external corner fillet to facilitate measurement of the external corner fillet, scans the external corner fillet profile of the first auxiliary measurement sheet body, fits an external corner fillet curve, offsets the external corner fillet curve by a distance of the first preset thickness to obtain a fillet profile, and realizes measurement of the external corner fillet, thereby improving measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of data measurement technology, specifically to a method for generating blade contours, a method for generating blade models, an apparatus, and equipment. Background Technology

[0002] Currently, optical 3D scanning, as a measurement technology integrating optics, mechanics, electronics, and computer technology, is widely used. Optical 3D scanning is mainly used to scan the spatial shape and structure of objects to obtain the spatial coordinates of the object's surface. 3D scanning has the advantages of high speed, large information capacity, and wide applicability. However, scanning blade-like components, especially areas with large radii of curvature on the leading and trailing edges, is quite difficult.

[0003] In existing technologies, the blade is scanned by dividing the area with a large radius of curvature, with more scanning points in areas of high curvature and fewer scanning points in areas of low curvature. However, dividing and scanning the blade consumes a lot of manpower and resources, making it difficult to capture the shape of areas with a large radius of curvature. Summary of the Invention

[0004] In view of this, the present invention provides a method for generating blade contours, a method for generating blade models, an apparatus and equipment to solve the problem of difficulty in capturing the shape of regions with large radii of curvature.

[0005] In a first aspect, the present invention provides a method for generating a blade profile, the method comprising:

[0006] A first auxiliary measuring sheet of a first preset thickness is attached to the rounded corner of the target blade. The first auxiliary measuring sheet is an opaque sheet with a matte surface.

[0007] Optical scanning is performed on the outer surface of the first auxiliary measuring sheet to generate the rounded corner profile of the external corner;

[0008] Based on the first preset thickness, the fillet curve of the positive corner is offset accordingly to obtain the first contour corresponding to the fillet of the positive corner of the target blade.

[0009] This invention uses an auxiliary measuring sheet attached to the rounded corner of the blade with a large curvature to magnify the rounded corner and facilitate its measurement. By scanning the outline of the rounded corner on the outer surface of the attached auxiliary measuring sheet to fit the rounded corner curve, and by offsetting the rounded corner curve by a first preset thickness, the first outline of the rounded corner is obtained, thereby achieving the measurement of the rounded corner and improving the measurement accuracy.

[0010] In one optional implementation, the method further includes:

[0011] Optical scanning is performed on the flat sections of the pressure and suction surfaces of the target blade to obtain the second profiles corresponding to the flat sections of the pressure and suction surfaces of the target blade.

[0012] This invention generates a second profile corresponding to the flattened section of the pressure surface and suction surface by scanning the flattened section profile.

[0013] In one optional implementation, the method further includes:

[0014] The rounded corners of the target blade are filled with a wax pattern to obtain the filled model;

[0015] A third auxiliary measuring sheet of a third preset thickness is pasted at the outer corner of the filling model corresponding to the inner corner rounded corner of the target blade. The third auxiliary measuring sheet is an opaque sheet with a matte surface.

[0016] Optical scanning is performed on the outer surface of the third auxiliary measuring piece to generate an auxiliary corner rounding curve;

[0017] Based on the third preset thickness, the auxiliary positive corner rounded curve is offset accordingly to obtain the third contour corresponding to the negative corner rounded corner of the target blade.

[0018] This invention achieves contour scanning of the inner corner rounded corner by filling the inner corner rounded corner of the target blade with a wax pattern, attaching an auxiliary measuring sheet, and then scanning the contour of the outer corner rounded corner of the attached auxiliary measuring sheet.

[0019] In an optional implementation, before optically scanning the flat profile of the pressure and suction surfaces of the target blade, the method further includes:

[0020] The surface finish of the target blade is obtained, and the surface finish of the target blade is compared with a preset surface finish threshold.

[0021] If the smoothness of the target blade is not greater than the preset smoothness threshold, then the step of performing optical scanning on the flat section contour of the pressure surface and suction surface of the target blade to obtain the second contour corresponding to the flat section of the pressure surface and suction surface of the target blade is performed.

[0022] If the smoothness of the target blade is greater than the preset smoothness threshold, then a second auxiliary measuring sheet of a second preset thickness is pasted on the flat section of the pressure surface and suction surface of the target blade. The second auxiliary measuring sheet is an opaque sheet with a matte surface.

[0023] Optical scanning is performed on the contour of the flat section to which the second auxiliary measuring sheet is attached to obtain the flat section measurement curve corresponding to the flat section;

[0024] Based on the second preset thickness, the measured curve of the flat section is offset accordingly to obtain the second contour corresponding to the flat section of the pressure surface and suction surface of the target blade.

[0025] This invention performs contour scanning on blades with inconsistent surface finish. Blades with lower surface finish are directly scanned, while blades with higher surface finish are scanned by attaching auxiliary measuring plates. Contour scanning is then performed on the blades with the attached auxiliary measuring plates to obtain the second contour corresponding to the flat sections of the pressure and suction surfaces.

[0026] In one optional embodiment, the first preset thickness satisfies the following conditions: the length of the first auxiliary measuring sheet in the spanwise direction of the target blade is greater than three times the diameter of the outer corner fillet; the angle between the first auxiliary measuring sheet and the adhesive surface on the target blade is an acute angle; the length of the wax pattern filled at the inner corner fillet of the target blade along the blade body direction is greater than or equal to 1.5 times the diameter of the inner corner fillet, and the length of the wax pattern filled along the tenon direction of the root platform of the target blade is greater than or equal to 1.5 times the diameter of the inner corner fillet.

[0027] This invention limits the thickness of the auxiliary measuring sheet, the angle between the auxiliary measuring sheet and the surface to be bonded, and the length of the wax pattern to ensure the accuracy of the target blade radius measurement, thereby improving the accuracy of the blade profile after scanning offset.

[0028] Secondly, the present invention provides a method for generating a blade model, the method comprising:

[0029] Obtain the first profile corresponding to the positive corner fillet of the target blade at different cross-sectional heights, the second profile corresponding to the flat section of the pressure surface and suction surface, and the third profile corresponding to the negative corner fillet;

[0030] The first contour, the second contour, and the third contour are sequentially spliced ​​together using connecting contours according to the cross-sectional height to obtain the three-dimensional blade model of the target blade. The interval length of the connecting contours is less than one-hundredth of the arc length of the pressure surface and the suction surface.

[0031] This invention constructs a three-dimensional blade model of the target blade by connecting the outlines of the positive corner rounded corner, flat section, and negative corner rounded corner, thereby facilitating the analysis of the blade based on the three-dimensional blade model.

[0032] Thirdly, the present invention provides a blade profile generation device, the device comprising:

[0033] The first adhesive module is used to adhesive a first auxiliary measuring sheet of a first preset thickness at the rounded corner of the target blade. The first auxiliary measuring sheet is an opaque sheet with a matte surface.

[0034] The first curve generation module is used to perform optical scanning on the outer surface of the first auxiliary measurement sheet to generate the rounded corner curve of the outer corner.

[0035] The first contour obtaining module is used to offset the corner fillet curve of the positive corner according to the first preset thickness to obtain the first contour corresponding to the corner fillet of the target blade.

[0036] Fourthly, the present invention provides a blade model generation apparatus, the apparatus comprising:

[0037] The acquisition module is used to acquire the first contour corresponding to the positive corner fillet of the target blade at different cross-sectional heights, the second contour corresponding to the flat section of the pressure surface and suction surface, and the third contour corresponding to the negative corner fillet. The interval length between the first contour, the third contour and the connecting contour between the second contour is less than one-hundredth of the arc length of the pressure surface and the suction surface.

[0038] The model acquisition module is used to sequentially splice the first contour, the second contour, and the third contour according to the cross-sectional height to obtain the three-dimensional blade model of the target blade.

[0039] Fifthly, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the blade profile generation method of the first aspect or any corresponding embodiment thereof, or the blade model generation method of the second aspect.

[0040] In a sixth aspect, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the blade profile generation method of the first aspect or any corresponding embodiment thereof, or the blade model generation method of the second aspect. Attached Figure Description

[0041] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the structure of various parts of the compressor blade according to an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of an optical scanning blade according to an embodiment of the present invention;

[0044] Figure 3 This is a schematic flowchart of a blade contour generation method according to an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram of the cross-section of a compressor blade bonded to a sheet according to an embodiment of the present invention;

[0046] Figure 5 This is a flowchart illustrating another blade profile generation method according to an embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of the overall blade wax pattern filling according to an embodiment of the present invention;

[0048] Figure 7 This is a schematic diagram of the blade wax pattern filling section according to an embodiment of the present invention;

[0049] Figure 8 This is a schematic diagram of another cross-section of the blade wax pattern filling according to an embodiment of the present invention;

[0050] Figure 9 This is a schematic flowchart of a blade model generation method according to an embodiment of the present invention;

[0051] Figure 10 This is a schematic diagram of the blade and its cut cross-section obtained by scanning according to an embodiment of the present invention;

[0052] Figure 11 This is a schematic diagram of the blade fitting curve connection according to an embodiment of the present invention;

[0053] Figure 12 This is a schematic diagram of another blade fitting curve connection according to an embodiment of the present invention;

[0054] Figure 13 This is a schematic diagram of point cloud data capture according to an embodiment of the present invention;

[0055] Figure 14 This is a structural block diagram of a blade profile generation device according to an embodiment of the present invention;

[0056] Figure 15 This is a structural block diagram of a blade model generation device according to an embodiment of the present invention;

[0057] Figure 16 This is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] Currently, for blade-type components, optical 3D scanning has difficulty capturing the shape of areas with large radii of curvature, such as the leading edge and trailing edge, which leads to relatively large errors.

[0060] This invention takes the compressor blades of a gas turbine as an example. Figure 1 As shown, the compressor blade includes a blade body 1, a blade blade 2, a blade root tenon 3, a leading edge of the blade blade 4, a trailing edge 5, and a tip protrusion 8. Figure 2 As shown, the external dimensions of the blades were measured using an optical three-dimensional scanning device. Due to the large curvature of the leading and trailing edges, the light emitted by the light source was reflected back from the leading and trailing edges in a scattered manner, resulting in a large measurement error.

[0061] According to an embodiment of the present invention, a method for generating blade profiles is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0062] This embodiment provides a method for generating blade contours, which can be used on mobile terminals. Figure 3 This is a flowchart of a blade contour generation method according to an embodiment of the present invention, such as... Figure 3 As shown, the process includes the following steps:

[0063] Step S301: Attach the first auxiliary measuring sheet of the first preset thickness to the rounded corner of the target blade.

[0064] The first auxiliary measuring sheet is an opaque sheet with a matte surface.

[0065] In this embodiment of the invention, a first auxiliary measuring sheet is attached to the leading edge, trailing edge, etc. of the target blade. The first auxiliary measuring sheet is a sheet of equal thickness, opaque, matte surface, and made of flexible material. The first auxiliary measuring sheet is attached to the rounded corner of the external corner to enlarge the rounded corner so as to facilitate the measurement of the external corner.

[0066] Specifically, the length of the first auxiliary measuring piece attached to the leading edge, trailing edge, etc. of the target blade in the spanwise direction is at least three times the diameter of the rounded corner of the outer corner, and the angle between the first auxiliary measuring piece and the surface on the target blade to which it is attached is an acute angle.

[0067] The angle between the first auxiliary measuring sheet and the adhesive surface on the target blade is an acute angle. An optical measuring device can be used to completely scan the corner area at the junction of the auxiliary measuring sheet and the target blade, ensuring the integrity of the blade feature information at the junction of the auxiliary measuring sheet and the target blade.

[0068] like Figure 4 As shown, a first sheet 61 of equal thickness, opaque, matte surface, and made of flexible material is pasted onto the leading edge of the leaf, and a second sheet 62 of equal thickness, opaque, matte surface, and made of flexible material is pasted onto the trailing edge. The first sheet 61 and the second sheet 62 are pasted from the top of the leaf to the platform near the leaf root, covering all the rounded corner areas of the leading and trailing edges. That is, the first sheet 61 and the second sheet 62 are the envelope surfaces that envelop the leading or trailing edge from top to bottom.

[0069] Step S302: Optical scanning is performed on the outer surface of the first auxiliary measuring sheet to generate the rounded corner profile of the outer corner.

[0070] In this embodiment of the invention, an optical scanner or similar device is used to scan the rounded corner contour of the outer surface of the first auxiliary measuring sheet. Alternatively, a laser scanner can be used to scan the rounded corner contour. This is merely an example and is not intended to limit the scope.

[0071] Step S303: Based on the first preset thickness, the corner fillet curve is offset accordingly to obtain the first contour corresponding to the corner fillet of the target blade.

[0072] In this embodiment of the invention, based on the first preset thickness of the first auxiliary measuring sheet attached to the rounded corner of the target blade, the magnified rounded corner curve contour is offset inward by the first preset thickness to obtain the first contour corresponding to the magnified rounded corner of the target blade.

[0073] The blade contour generation method provided in this embodiment involves attaching an auxiliary measuring sheet to the rounded corner of the blade with a large curvature, thereby enlarging the rounded corner to facilitate measurement. The rounded corner contour of the outer surface of the blade with the first auxiliary measuring sheet attached is scanned to fit the rounded corner curve. By offsetting the rounded corner curve by a distance of a first preset thickness, the first contour of the rounded corner is obtained, thereby realizing the measurement of the rounded corner and improving the measurement accuracy.

[0074] This embodiment provides a method for generating blade contours. Figure 5 This is a flowchart of a blade contour generation method according to an embodiment of the present invention, such as... Figure 5 As shown, the process includes the following steps:

[0075] Step S501: Attach the first auxiliary measuring sheet of the first preset thickness to the rounded corner of the target blade.

[0076] Please see details Figure 3 Step S301 of the illustrated embodiment will not be described again here.

[0077] Step S502: Optical scanning is performed on the outer surface of the first auxiliary measuring sheet to generate the rounded corner profile of the outer corner.

[0078] Please see details Figure 3 Step S302 of the illustrated embodiment will not be described again here.

[0079] Step S503: Based on the first preset thickness, the corner fillet curve is offset accordingly to obtain the first contour corresponding to the corner fillet of the target blade.

[0080] Please see details Figure 3 Step S303 of the illustrated embodiment will not be described again here.

[0081] Step S504: Obtain the surface finish of the target blade and compare the surface finish of the target blade with a preset surface finish threshold.

[0082] Step S505: If the smoothness of the target blade is not greater than the preset smoothness threshold, then perform optical scanning on the flat section contours of the pressure surface and suction surface of the target blade to obtain the second contours corresponding to the flat sections of the pressure surface and suction surface of the target blade.

[0083] Step S506: If the smoothness of the target blade is greater than the preset smoothness threshold, then a second auxiliary measuring sheet of a second preset thickness is pasted on the flat section of the pressure surface and suction surface of the target blade. The second auxiliary measuring sheet is an opaque sheet with a matte surface.

[0084] Step S507: Optical scanning is performed on the contour of the flat section with the second auxiliary measuring sheet attached to it to obtain the flat section measurement curve corresponding to the flat section.

[0085] Step S508: Based on the second preset thickness, the flat section measurement curve is offset accordingly to obtain the second contour corresponding to the flat section of the pressure surface and suction surface of the target blade.

[0086] In this embodiment of the invention, the smoothness refers to the degree of smoothness and gloss of the blade surface. Taking a preset smoothness threshold Ra of 1.6 as an example, the smaller the smoothness, the smoother the surface. When the smoothness of the target blade is not greater than the preset smoothness threshold, the surface of the target blade is relatively smooth, and the flat section contours of the pressure surface and suction surface of the target blade can be directly optically scanned to obtain the second contours corresponding to the flat sections of the pressure surface and suction surface.

[0087] If the surface finish of the target blade is greater than the preset surface finish threshold, for example, for components with high surface finish such as axial compressor blades and centrifugal impeller blades, a second auxiliary measuring sheet of a second preset thickness is also attached to the pressure surface and suction surface. The second auxiliary measuring sheet and the first auxiliary measuring sheet are both sheets of equal thickness, opaque, matte surface, and made of flexible material.

[0088] The measured curve of the flat section of the target blade is offset by a distance of the second preset thickness, and the contour of the flat section after offset is scanned to obtain the second contour.

[0089] By performing contour scanning on blades with inconsistent surface finish, blades with lower surface finish are directly scanned, while blades with higher surface finish are scanned with an auxiliary measuring plate attached. Contour scanning is then performed on the blades with the attached auxiliary measuring plate to obtain the second contour corresponding to the flat sections of the pressure and suction surfaces. For blades with high surface finish, this method overcomes the problem of reduced measurement accuracy caused by local specular reflection of light emitted from optical measuring instruments, thus improving measurement accuracy.

[0090] Step S509: Fill the rounded corners of the target blade with a wax pattern to obtain the filled model.

[0091] Step S510: Paste the third auxiliary measuring sheet of the third preset thickness at the convex corner of the filling model corresponding to the convex corner of the target blade.

[0092] The third auxiliary measurement sheet is an opaque sheet with a matte surface.

[0093] Step S511: Optical scanning is performed on the outer surface of the third auxiliary measuring piece to generate the auxiliary corner rounded curve.

[0094] Step S512: Based on the third preset thickness, the auxiliary positive corner rounded curve is offset accordingly to obtain the third contour corresponding to the negative corner rounded corner of the target blade.

[0095] In this embodiment of the invention, for the inner corner rounded corner at the intersection of the target blade's leaf shape and the blade root platform, the inner corner rounded corner of the blade tip platform and the protruding component, wax pattern is filled into the inner corner rounded corner area to transform the inner corner rounded corner and the leaf shape segment and the blade root tenon segment close to the inner corner rounded corner into the outer corner rounded corner segment.

[0096] A third auxiliary measuring sheet of a third preset thickness is pasted at the corresponding convex corner of the infill model and the target blade to obtain a rounded corner shape. The third auxiliary measuring sheet, the second auxiliary measuring sheet, and the first auxiliary measuring sheet are all sheets of equal thickness, opaque, matte surface, and made of flexible material to obtain a rounded corner shape.

[0097] The auxiliary positive corner fillet curve is offset inward by a third preset thickness, and the offset negative corner fillet is scanned to obtain the third contour. The first, second, and third preset thicknesses all satisfy the condition that the length of the corresponding auxiliary measurement blade in the spanwise direction of the target blade is greater than three times the fillet diameter. The first, second, and third preset thicknesses can be the same or set according to the actual application scenario; no limitation is made here.

[0098] Specifically, for the wax pattern of the rounded corner at the intersection of the blade shape and the blade root platform tenon of the target blade, the length of the wax pattern along the blade body direction of the target blade is greater than or equal to 1.5 times the diameter of the rounded corner, and the length of the wax pattern along the blade root platform tenon direction of the target blade is greater than or equal to 1.5 times the diameter of the rounded corner.

[0099] When filling the wax pattern, for the rounded corners at the intersection of the leaf shape and the leaf root platform tenon, and the rounded corners between the leaf tip platform and the protrusion, the wax pattern needs to be filled around the leaf shape. At the leading edge and trailing edge of the leaf, the wax pattern is divided into two halves, and the third auxiliary measuring sheet is attached to the two halves of the wax pattern near the leaf side.

[0100] like Figure 6 As shown, first fill the inside corner with wax pattern 12, as... Figure 7 and Figure 8 As shown, wax pattern 12 is divided into a first wax pattern 63 and a second wax pattern 64 from the leading edge and trailing edge. A third auxiliary measuring sheet is attached to the blade side of each half of the wax pattern. Sheet 631 is attached to the outside of the first wax pattern 63 and sheet 641 is attached to the outside of the second wax pattern 64. Then, optical scanning is performed on the rounded corners of 631 and 641.

[0101] The blade contour generation method provided in this embodiment involves filling the rounded corners of the target blade with a wax pattern, attaching an auxiliary measurement sheet, and scanning the outline of the rounded corners of the attached auxiliary measurement sheet to obtain the outline of the rounded corners of the inner corners, thereby achieving the scanning of the outline of the rounded corners of the inner corners.

[0102] According to an embodiment of the present invention, another embodiment of a blade model generation method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0103] This embodiment provides a method for generating a blade model, which can be used on mobile terminals. Figure 9 This is a flowchart of a blade model generation method according to an embodiment of the present invention, such as... Figure 9 As shown, the process includes the following steps:

[0104] Step S901: Obtain the first profile corresponding to the positive corner fillet of the target blade at different cross-sectional heights, the second profile corresponding to the flat section of the pressure surface and suction surface, and the third profile corresponding to the negative corner fillet.

[0105] Step S902: According to the cross-sectional height, the first contour, the second contour, and the third contour are spliced ​​together by connecting contours to obtain the three-dimensional blade model of the target blade.

[0106] The interval length of the connecting contour is less than one-hundredth of the arc length of the pressure surface and the suction surface.

[0107] In this embodiment of the invention, a first contour, a second contour, and a third contour scanned by an optical scanner or other device are obtained. The first contour corresponding to the offset positive corner rounded corner, the second contour corresponding to the flat section, and the third contour corresponding to the negative corner rounded corner are spliced ​​together by bridging to form a complete blade cross-sectional contour.

[0108] like Figure 10 As shown, an optical scanner is used to scan and measure the shape of the target blade to obtain point cloud 11. Several cross-sectional point cloud data are then extracted from point cloud 11 according to the preset blade height.

[0109] like Figure 11 As shown, Figure 11 For one of the cross-sectional views, the point data of each segment on this cross-section are fitted into a spline curve. Generally, there should be a leading edge segment 73, a pressure side segment 72, a trailing edge segment 74, and a suction side segment 71. The leading edge segment 73 and the trailing edge segment 74 are offset inward according to the thickness of the attached auxiliary measurement sheet, respectively, to obtain the curves of segments 75 and 76. The segments 75 and 71, 75 and 76, 72 and 75, and 72 and 76 are connected by bridging to form complete tangent contour lines.

[0110] If the compressor blades are new parts with a high surface finish, then auxiliary measuring plates also need to be attached to the flat sections of the pressure and suction surfaces, such as... Figure 12As shown, segments 71, 72, 73, and 74 of the fitted curve are shifted inward to form segments 77, 75, 78, and 76. These four segments are then connected end to end in pairs using the bridging curve method to form complete, tangent contour lines.

[0111] like Figure 13 As shown, for the obtained optical scanning data, point cloud data is extracted at various positions along the blade by using a rounded normal section 121 at the intersection of the blade shape and the blade root. The measured data is then fitted, offset, and curve bridging to form a continuous set of curves. A solid model is formed by connecting the lofted curve sets.

[0112] After obtaining the blade profiles of different blade height sections, the blades of multiple heights are lofted and connected from top to bottom in the 3D modeling software to form a complete blade surface model.

[0113] The blade model generation method provided in this embodiment constructs a three-dimensional blade model of the target blade by connecting the outlines of the positive corner rounded corner, flat section and negative corner rounded corner of the target blade, thereby facilitating the analysis of the blade based on the three-dimensional blade model.

[0114] This embodiment also provides a blade profile generation device, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0115] This embodiment provides a blade contour generation device, such as... Figure 14 As shown, it includes:

[0116] The first adhesive module 1401 is used to adhesive a first auxiliary measuring sheet of a first preset thickness at the rounded corner of the target blade. The first auxiliary measuring sheet is an opaque sheet with a matte surface.

[0117] The first curve generation module 1402 is used to optically scan the outer surface of the first auxiliary measuring sheet to generate the outer corner rounded contour and generate the outer corner rounded curve.

[0118] The first contour acquisition module 1403 is used to offset the corner fillet curve of the positive corner according to the first preset thickness to obtain the first contour corresponding to the corner fillet of the target blade.

[0119] In some alternative embodiments, the device further includes:

[0120] The second profile acquisition module is used to optically scan the profiles of the flat sections of the pressure and suction surfaces of the target blade to obtain the second profiles corresponding to the flat sections of the pressure and suction surfaces of the target blade.

[0121] In some alternative embodiments, the device further includes:

[0122] The infill model module is used to fill the rounded corners of the target blade with a wax pattern, thus obtaining the infill model.

[0123] The second pasting module is used to paste a third auxiliary measuring sheet of a third preset thickness at the outer corner of the infill model corresponding to the inner corner rounded corner of the target blade. The third auxiliary measuring sheet is an opaque sheet with a matte surface.

[0124] The second curve generation module is used to optically scan the outer surface of the third auxiliary measuring piece to generate the auxiliary corner rounded curve.

[0125] The third contour acquisition module is used to offset the auxiliary positive corner fillet curve according to the third preset thickness to obtain the third contour corresponding to the negative corner fillet of the target blade.

[0126] In some alternative embodiments, the device further includes:

[0127] The comparison module is used to obtain the surface finish of the target blade and compare the surface finish of the target blade with a preset surface finish threshold.

[0128] The execution module is used to perform an optical scan of the flat section contours of the pressure surface and suction surface of the target blade if the smoothness of the target blade is not greater than a preset smoothness threshold, so as to obtain the second contour corresponding to the flat section of the pressure surface and suction surface of the target blade.

[0129] The third pasting module is used to paste a second auxiliary measuring sheet of a second preset thickness on the flat section of the pressure surface and suction surface of the target blade if the smoothness of the target blade is greater than the preset smoothness threshold. The second auxiliary measuring sheet is an opaque sheet with a matte surface.

[0130] The third curve generation module is used to optically scan the contour of the flat section with the second auxiliary measurement piece pasted on it to obtain the flat section measurement curve corresponding to the flat section.

[0131] The third contour acquisition module is used to offset the flat section measurement curve according to the second preset thickness to obtain the second contour corresponding to the flat section of the pressure surface and suction surface of the target blade.

[0132] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0133] In this embodiment, the blade profile generation device is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0134] This embodiment also provides a blade model generation device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0135] This embodiment provides a blade model generation device, such as... Figure 15 As shown, it includes:

[0136] The acquisition module 1501 is used to acquire the first profile corresponding to the positive corner fillet of the target blade at different cross-sectional heights, the second profile corresponding to the flat section of the pressure surface and suction surface, and the third profile corresponding to the negative corner fillet. The interval length between the first profile, the third profile and the connecting profile between the second profile is less than one-hundredth of the arc length of the pressure surface and the suction surface.

[0137] The model obtains module 1502, which is used to splice the first contour, the second contour and the third contour in sequence according to the cross-sectional height to obtain the three-dimensional blade model of the target blade.

[0138] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0139] In this embodiment, the blade profile generation device is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0140] This invention also provides a computer device having the above-described features. Figure 14 The blade profile generation device shown or Figure 15 The blade model generation device shown.

[0141] Please see Figure 16 , Figure 16 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 16As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 16 Take a processor 10 as an example.

[0142] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GPA), or any combination thereof.

[0143] The memory 20 stores instructions executable by at least one processor 10 to cause at least one processor 10 to perform the method shown in the above embodiments.

[0144] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0145] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0146] The computer device also includes an input device 30 and an output device 40. The processor 10, memory 20, input device 30, and output device 40 can be connected via a bus or other means. Figure 16 Taking the example of a connection between China and Israel via a bus.

[0147] Input device 30 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the computer device, such as a touch screen. Output device 40 may include display devices. These display devices include, but are not limited to, liquid crystal displays, light-emitting diodes (LEDs), displays, and plasma displays. In some alternative embodiments, the display device may be a touch screen.

[0148] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0149] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for generating a blade outline, characterized in that, The method includes: A first auxiliary measuring sheet of a first preset thickness is attached to the rounded corner of the target blade. The first auxiliary measuring sheet is an opaque sheet with a matte surface. Optical scanning is performed on the outer surface of the first auxiliary measuring sheet to generate the rounded corner profile of the external corner; Based on the first preset thickness, the corner fillet curve is offset accordingly to obtain the first contour corresponding to the corner fillet of the target blade; Optical scanning is performed on the flat section contours of the pressure surface and suction surface of the target blade to obtain the second contours corresponding to the flat section of the pressure surface and suction surface of the target blade. Prior to optically scanning the flat profile of the pressure and suction surfaces of the target blade, the method further includes: The surface finish of the target blade is obtained, including the smoothness and gloss of the blade surface. The surface finish of the target blade is compared with a preset surface finish threshold. If the surface finish of the target blade is not greater than the preset surface finish threshold, the step of optically scanning the flat section contours of the pressure and suction surfaces of the target blade to obtain the second contours corresponding to the flat sections of the pressure and suction surfaces of the target blade is performed. If the surface finish of the target blade is greater than the preset surface finish threshold, a second auxiliary measuring sheet of a second preset thickness is attached to the flat section of the pressure and suction surfaces of the target blade. The second auxiliary measuring sheet is a sheet of the same thickness as the first auxiliary measuring sheet, opaque, matte, and made of flexible material. The flat section contour with the attached second auxiliary measuring sheet is optically scanned to obtain the flat section measurement curve corresponding to the flat section. According to the second preset thickness, the flat section measurement curve is offset accordingly to obtain the second contours corresponding to the flat sections of the pressure and suction surfaces of the target blade.

2. The method according to claim 1, characterized in that, The method further includes: The rounded corners of the target blade are filled with a wax pattern to obtain the filled model; A third auxiliary measuring sheet of a third preset thickness is pasted at the outer corner of the filling model corresponding to the inner corner rounded corner of the target blade. The third auxiliary measuring sheet is an opaque sheet with a matte surface. Optical scanning is performed on the outer surface of the third auxiliary measuring piece to generate an auxiliary corner rounding curve; Based on the third preset thickness, the auxiliary positive corner rounded curve is offset accordingly to obtain the third contour corresponding to the negative corner rounded corner of the target blade.

3. The method according to claim 2, characterized in that, The first preset thickness satisfies the requirement that the length of the first auxiliary measuring sheet in the spanwise direction of the target blade is greater than three times the diameter of the rounded corner. The angle between the first auxiliary measuring sheet and the surface on the target blade that is adhered to is an acute angle; The length of the wax pattern filling the rounded corner of the target blade along the direction of the blade body is greater than or equal to 1.5 times the diameter of the rounded corner, and the length of the wax pattern filling along the direction of the tenon of the target blade root platform is greater than or equal to 1.5 times the diameter of the rounded corner.

4. A method for generating a blade model, characterized in that, The method includes: The first profile corresponding to the positive corner fillet of the target blade at different cross-sectional heights, the second profile corresponding to the flat section of the pressure surface and suction surface, and the third profile corresponding to the negative corner fillet are obtained. The first profile, the second profile, and the third profile are generated by the blade profile generation method according to any one of claims 1-3. The first contour, the second contour, and the third contour are sequentially spliced ​​together using connecting contours according to the cross-sectional height to obtain the three-dimensional blade model of the target blade. The interval length of the connecting contours is less than one-hundredth of the arc length of the pressure surface and the suction surface.

5. A blade profile generation device, characterized in that, The device includes: The first adhesive module is used to adhesive a first auxiliary measuring sheet of a first preset thickness at the rounded corner of the target blade. The first auxiliary measuring sheet is an opaque sheet with a matte surface. The first curve generation module is used to perform optical scanning on the outer surface of the first auxiliary measurement sheet to generate the rounded corner curve of the outer corner. The first contour obtaining module is used to offset the corner fillet curve of the positive corner according to the first preset thickness to obtain the first contour corresponding to the corner fillet of the target blade. The second profile acquisition module is used to optically scan the profile of the flat section of the pressure surface and suction surface of the target blade to obtain the second profile corresponding to the flat section of the pressure surface and suction surface of the target blade. Before optically scanning the flat section contours of the pressure and suction surfaces of the target blade: the surface finish of the target blade is acquired, including the smoothness and gloss of the blade surface, and the surface finish of the target blade is compared with a preset surface finish threshold; if the surface finish of the target blade is not greater than the preset surface finish threshold, the step of optically scanning the flat section contours of the pressure and suction surfaces of the target blade to obtain the second contour corresponding to the flat section of the pressure and suction surfaces of the target blade is performed; if the surface finish of the target blade is greater than the preset surface finish threshold, a second auxiliary measuring sheet of a second preset thickness is attached to the flat section of the pressure and suction surfaces of the target blade. The second auxiliary measuring sheet is a sheet of the same thickness as the first auxiliary measuring sheet, opaque, matte, and made of flexible material; the flat section contour with the attached second auxiliary measuring sheet is optically scanned to obtain the flat section measurement curve corresponding to the flat section; according to the second preset thickness, the flat section measurement curve is offset accordingly to obtain the second contour corresponding to the flat section of the pressure and suction surfaces of the target blade.

6. A blade model generation device, characterized in that, The device includes: The acquisition module is used to acquire the first contour corresponding to the positive corner fillet of the target blade at different cross-sectional heights, the second contour corresponding to the flat section of the pressure surface and suction surface, and the third contour corresponding to the negative corner fillet. The interval length between the first contour, the third contour and the connecting contour between the second contour is less than one-hundredth of the arc length of the pressure surface and the suction surface. The model acquisition module is used to sequentially splice the first contour, the second contour, and the third contour according to the cross-sectional height to obtain a three-dimensional blade model of the target blade. The first contour, the second contour, and the third contour are generated by the blade contour generation method according to any one of claims 1-3.

7. A computer device, characterized in that, include: The system includes a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes the computer instructions to perform the blade profile generation method of any one of claims 1-3 or the blade model generation method of claim 4.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the blade profile generation method of any one of claims 1-3 or the blade model generation method of claim 4.

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