Aero-engine cone positioning device and surface coating shedding area detection method

Abstract

The application relates to an aero-engine cone positioning device and a surface coating shedding area detection method, and belongs to the technical field of engine cone detection. The device comprises a supporting seat, a first positioning mechanism and a second positioning mechanism are installed on the supporting seat, the second positioning mechanism is located above the first positioning mechanism, a cylinder is further installed on the supporting seat, the cylinder is used for controlling the second positioning mechanism to move close to or away from the first positioning mechanism, one side of the first positioning mechanism close to the supporting seat is installed on the supporting seat, the first positioning mechanism comprises a first limiting body, a mounting portion and a rubber piece, the mounting portion is installed at one end of the first limiting body close to the second positioning mechanism and is rotationally connected with the first limiting body, and the rubber piece is sleeved on the outer surface of the mounting portion. By arranging the first positioning mechanism and the second positioning mechanism, the problem that the overall stability of the cone is low during measurement in the prior art, thereby reducing the measurement accuracy of the surface shedding area of the cone, is solved.

Description

Technical Field

[0001] This invention relates to the field of engine cone inspection technology, specifically to an aero-engine cone positioning device and a method for detecting the area of ​​surface coating peeling. Background Technology

[0002] When engines are used in the aviation field, materials need to be applied to the outer surface of the engine cone. After the materials are applied, the coating formed on the outer surface of the cone can effectively shield radar signals.

[0003] After prolonged use, the coating on the outer surface of a cone may peel off. Therefore, it is necessary to periodically inspect the coating on the outer surface of the cone, mainly by measuring the area of ​​peeling off, in order to determine whether the total area of ​​peeling off has reached the standard for recoating. However, in the existing technology, because the outer surface of the cone is smooth and curved, the positioning component used for measurement and fixation cannot fit the cone perfectly. During measurement, the overall stability of the cone is low, resulting in low accuracy in measuring the area of ​​peeling off the cone surface. Summary of the Invention

[0004] This invention provides an aircraft engine cone positioning device and a method for detecting the area of ​​surface coating peeling, which solves the problem in the prior art that the positioning component used for measurement and fixation cannot completely fit the cone because the outer surface of the cone is smooth and curved.

[0005] This invention is achieved through the following technical solution:

[0006] An aircraft engine cone positioning device is used to position a cone to be inspected. It includes a support base, on which a first positioning mechanism and a second positioning mechanism are mounted, with the second positioning mechanism positioned above the first positioning mechanism. A cylinder is also mounted on the support base to control the second positioning mechanism to move closer to or away from the first positioning mechanism. The first positioning mechanism is mounted to the support base on the side closest to it. The first positioning mechanism includes a first limiting body, a mounting part, and a rubber component. The mounting part is mounted on the end of the first limiting body closest to the second positioning mechanism and is rotatably connected to the first limiting body. The rubber component is sleeved on the outer surface of the mounting part and fixed to it. The rubber component is frustoconical in shape. The diameter of the rubber component is smaller than the diameter of the groove at the large diameter end of the cone. The cone is fitted onto the first positioning mechanism through the groove at the large diameter end of the cone. When the first positioning mechanism is in position, the outer wall of the rubber component abuts against the inner wall of the cone, and the rubber component is used for the initial positioning of the cone. The second positioning mechanism includes a second limiting body and a positioning post. The side of the second limiting body near the support seat is slidably connected to the support seat through a sliding groove under the action of a cylinder. The positioning post is installed on the side of the second limiting body near the first positioning mechanism and is rotatably connected to the second limiting body. When the second positioning mechanism is in position, the positioning post enters the interior of the cone through the groove at the small diameter end of the cone under the action of a cylinder, and the positioning post is used for the secondary positioning of the cone.

[0007] Furthermore, a first storage groove is provided at one end of the mounting part near the second limiting body, and a first airbag structure is installed inside the first storage groove; the first airbag structure includes a first airbag layer and multiple second airbag layers, which form a closed first airbag structure, and the multiple second airbag layers are all connected to the first airbag layer, and the multiple second airbag layers are integrally formed with the first airbag layer; the multiple second airbag layers are arranged around the first airbag layer, and the mounting part is provided with multiple slots corresponding to the second airbag layers, each second airbag layer passing through the corresponding slot and being limited by the mounting part; a compression structure is installed at one end of the positioning post near the first limiting body; during positioning, the compression structure contacts the first airbag structure and compresses the first airbag structure.

[0008] Furthermore, a limiting post is installed inside the mounting part, and the limiting post is located directly below the positioning post. The first airbag structure has a sleeve hole adapted to the limiting post, and the first airbag structure is sleeved on the limiting post through the sleeve hole. A pushing sleeve is sleeved on the limiting post, and the pushing sleeve is slidably connected to the limiting post through a return spring. A first extrusion plate is installed on the pushing sleeve. The outer diameter of the first extrusion plate is larger than the diameter of the sleeve hole. The extrusion structure is a sleeve, and the inner diameter of the sleeve is larger than the outer diameter of the pushing sleeve. During positioning, the sleeve is sleeved on the outer surface of the pushing sleeve.

[0009] Furthermore, a first external thread is provided on the outer surface of the push sleeve, and the first extrusion plate is threadedly connected to the push sleeve through the first external thread.

[0010] Furthermore, the first airbag structure includes a first airbag layer, a plurality of second airbag layers, a third airbag layer, and a plurality of fourth airbag layers;

[0011] The third airbag layer is located at the center of the first airbag layer, and the thickness of the third airbag layer is less than the thickness of the first airbag layer; each of the fourth airbag layers is located at the center of the side of the corresponding second airbag layer near the inner wall of the cone, and the thickness of the fourth airbag layer is less than the thickness of the second airbag layer.

[0012] Furthermore, a placement component is detachably connected to the first limiting body. The placement component is fixed to the mounting part via a connector, and the outer diameter of the placement component is smaller than the outer diameter of the mounting part. A second placement groove is provided at the end of the placement component away from the mounting part, and a second airbag structure is installed inside the second placement groove. Both the placement component and the second airbag structure are sleeved on the push sleeve. A second extrusion plate is installed on the push sleeve, and the second extrusion plate is located above the second airbag structure. A second external thread is provided on the outer surface of the push sleeve, and the second extrusion plate is threadedly connected to the push sleeve via the second external thread.

[0013] Furthermore, multiple second airbag layers are equidistantly distributed around the outer periphery of the first airbag layer.

[0014] Furthermore, a geared motor is installed inside the first limiting body, and the output end of the geared motor is fixedly connected to the mounting part.

[0015] Furthermore, an elastic sleeve is fitted onto the outer surface of the positioning post.

[0016] A method for detecting the surface coating peeling area of ​​an aero-engine cone includes the following steps:

[0017] S1: Adjustment of the cone, control the cone to rotate 90° in one go, divide the cone into four sides, and calculate the detachment area;

[0018] S2: The area recording method at the intersection of the four dividing lines: For the detached area divided by the four dividing lines, the area of ​​the intersection is recorded only on one side at a time, and the intersection is recorded on the same side for all four times.

[0019] S3: Calculation of the detachment area. Based on the shape of the detachment area on the cone surface, an irregular shape similar to a circle or a triangle is used to calculate the irregular detachment area.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] By setting up a first positioning mechanism and a second positioning mechanism, the problem in the prior art that when positioning the cone to be tested, the outer surface of the cone is smooth and curved, the positioning component used for measurement and fixation cannot completely fit the cone during measurement, resulting in low overall stability of the cone and low accuracy in measuring the area of ​​the cone surface that has fallen off. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a cone positioning device for an aircraft engine.

[0024] Figure 2 for Figure 1 A diagram showing the state of the second positioning mechanism after it moves toward the first positioning mechanism.

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 for Figure 1 A three-dimensional view of the first positioning mechanism in the middle;

[0027] Figure 5 for Figure 4 A schematic diagram of the structure;

[0028] Figure 6 for Figure 5 Sectional view of AA;

[0029] Figure 7 This is an isometric side sectional view of the first positioning mechanism;

[0030] Figure 8 for Figure 7 A schematic diagram of the structure of the first airbag in the middle;

[0031] Figure 9 for Figure 8 A schematic diagram of the improved structure of the first airbag in the middle;

[0032] Figure 10 for Figure 6 A schematic diagram of the further improved first positioning mechanism;

[0033] Figure 11 for Figure 10Enlarged view of point B in the middle.

[0034] Figure label:

[0035] 10. Support base; 20. First limiting body; 201. Gear motor; 21. Mounting part; 211. Rubber part; 212. First storage slot; 213. Limiting post; 22. Push sleeve; 221. First extrusion plate; 222. First external thread; 223. Return spring; 224. Second external thread; 225. Second extrusion plate; 23. First airbag structure; 231. First airbag layer; 232. Second airbag layer; 233. Sleeve hole; 234. Third airbag layer; 235. Fourth airbag layer; 24. Storage component; 241. Connector; 242. Second storage slot; 25. Second airbag structure; 30. Second limiting body; 31. Cylinder; 32. Positioning post; 321. Sleeve; 40. Cone. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. 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.

[0037] This application provides an aircraft engine cone positioning device and a method for detecting the area of ​​surface coating peeling, which solves the problem in the prior art that, due to the smooth and curved outer surface of the cone, the positioning component used for measurement and fixation cannot completely fit the cone during measurement, thereby improving the accuracy of cone surface peeling area detection.

[0038] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0039] In the prior art, after prolonged use, the coating on the outer surface of a cone will peel off. Therefore, it is necessary to periodically inspect the coating on the outer surface of the cone, mainly by measuring the area of ​​peeling off, in order to determine whether the total area of ​​peeling off has reached the standard for recoating. However, since the outer surface of the cone is smooth and curved, the positioning component used for measurement and fixation cannot fit the cone completely. During measurement, the overall stability of the cone is low, resulting in low accuracy in measuring the area of ​​peeling off the cone surface.

[0040] Research has found that, for example Figures 1-11As shown, by setting up a first positioning mechanism and a second positioning mechanism, the problem in the prior art that when positioning the cone to be tested, the outer surface of the cone is smooth and curved, the positioning component used for measurement and fixation cannot completely fit the cone during measurement, resulting in low overall stability of the cone and low accuracy in measuring the area of ​​the cone surface detachment is solved.

[0041] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0042] like Figures 1-4 As shown, an aircraft engine cone positioning device is used to position a cone 40 to be inspected, including a support base 10.

[0043] The support base 10 is equipped with a first positioning mechanism and a second positioning mechanism, with the second positioning mechanism located above the first positioning mechanism.

[0044] A cylinder 31 is also installed on the support base 10. The cylinder 31 is used to control the second positioning mechanism to move closer to or away from the first positioning mechanism.

[0045] The first positioning mechanism is installed on the side of the support base 10 near the support base 10. The first positioning mechanism includes a first limiting body 20, a mounting part 21 and a rubber part 211. The mounting part 21 is installed on the end of the first limiting body 20 near the second positioning mechanism and is rotatably connected to the first limiting body 20. The rubber part 211 is sleeved on the outer surface of the mounting part 21 and fixed to the mounting part 21.

[0046] The diameter of the rubber part 211 is smaller than the diameter of the large diameter end groove of the cone 40, and the cone 40 is sleeved on the first positioning mechanism through the large diameter end groove of the cone 40.

[0047] When the first positioning mechanism is in place, the outer side wall of the rubber part 211 abuts against the inner side wall of the cone 40, and the rubber part 211 is used for the initial positioning of the cone 40.

[0048] The second positioning mechanism includes a second limiting body 30 and a positioning post 32. The side of the second limiting body 30 closest to the support base 10 is slidably connected to the support base 10 through a sliding groove under the action of the cylinder 31. The positioning post 32 is installed on the side of the second limiting body 30 closest to the first positioning mechanism and is rotatably connected to the second limiting body 30.

[0049] When the second positioning mechanism is in position, the positioning pin 32, under the action of the cylinder 31, enters the interior of the cone 40 through the slot at the small diameter end of the cone 40, and the positioning pin 32 is used for secondary positioning of the cone 40.

[0050] Specifically, when setting the rubber part 211, the rubber part 211 can be set as a frustum shape to further improve the fit between the rubber part 211 and the inner wall of the cone 40. An elastic sleeve is fitted on the outer surface of the positioning post 32 to prevent the positioning post 32 from causing damage to the inner wall of the cone 40.

[0051] By setting up a first positioning mechanism and a second positioning mechanism, the cone 40 is initially positioned using the first positioning mechanism, and a second positioning is achieved after the initial positioning using the second positioning mechanism.

[0052] When the first positioning mechanism positions the cone 40, the rubber part 211 provided on the first positioning mechanism is located inside the cone 40 and abuts against the inner wall of the cone 40, realizing the initial positioning of the cone 40 by the first positioning mechanism. Since the rubber part 211 used for positioning is located inside the cone 40 when the first positioning mechanism is used to position the cone 40, and since the rubber part 211 is deformable, when the rubber part 211 achieves the positioning of the cone 40, the position where the rubber part 211 contacts the inner wall of the cone 40 can be completely fitted with the inner wall of the cone 40. This solves the problem in the prior art that when positioning the cone 40 to be tested, since the outer surface of the cone 40 is smooth and curved, the positioning part used for measurement and fixation cannot be completely fitted with the cone 40 during measurement, resulting in low overall stability of the cone 40 and low accuracy in measuring the surface area of ​​the cone 40.

[0053] Meanwhile, when setting the first positioning mechanism and the second positioning mechanism, the components of the first positioning mechanism and the second positioning mechanism used to position the cone 40 are both located inside the cone 40 and will not contact the outer surface of the cone 40, thus preventing the outer surface from being blocked. This prevents the positioning components from contacting the outer surface of the cone 40 when the first positioning mechanism and the second positioning mechanism position the cone 40, which would cause incomplete detection of the detachment area of ​​the outer surface of the cone 40 and lead to errors in the detection results.

[0054] During operation, the control mounting part 21 rotates, which drives the cone 40 to rotate, thereby facilitating a comprehensive inspection of the outer surface of the cone 40.

[0055] like Figure 6 As shown, a reduction motor 201 is installed inside the first limiting body 20. The output end of the reduction motor 201 is fixedly connected to the mounting part 21. The reduction motor 201 controls the single rotation angle of the cone 40 after positioning, which facilitates the detection of the surface area of ​​the cone 40.

[0056] Based on the above technical solutions, such as Figures 1-8As shown, the mounting part 21 has a first storage groove 212 at one end near the second limiting body 30, and a first airbag structure 23 is installed inside the first storage groove 212.

[0057] The first airbag structure 23 includes a first airbag layer 231 and a plurality of second airbag layers 232. The first airbag layer 231 and the plurality of second airbag layers 232 form a closed first airbag structure 23. The plurality of second airbag layers 232 are all connected to the first airbag layer 231, and the plurality of second airbag layers 232 are integrally formed with the first airbag layer 231.

[0058] Multiple second airbag layers 232 are arranged around the first airbag layer 231. The mounting part 21 has multiple slots that correspond one-to-one with the second airbag layers 232. Each second airbag layer 232 passes through the corresponding slot and is limited by the mounting part 21.

[0059] A compression structure is installed at one end of the positioning post 32 near the first limiting body 20;

[0060] During positioning, the extrusion structure contacts the first airbag structure 23 and extrudes the first airbag structure 23.

[0061] Specifically, multiple second airbag layers 232 are equidistantly distributed around the outer periphery of the first airbag layer 231, thereby improving the stability between the multiple second airbag layers 232 and the cone 40 when they come into contact with the cone 40.

[0062] By setting an installation part 21 on the first limiting body 20 and setting a first airbag structure 23 inside the installation part 21, and setting the first airbag structure 23 as a first airbag layer 231 and multiple second airbag layers 232, during positioning, after the first positioning mechanism and the second positioning mechanism perform initial positioning and secondary positioning of the cone 40, the cylinder 31 continues to control the positioning column 32 to move towards the first limiting body 20 inside the cone 40. During the movement, the extrusion structure on the positioning column 32 gradually contacts the first airbag structure 23 and extrudes the first airbag structure 23. After being extruded by the extrusion structure, the second airbag layer 232 on the first airbag structure 23 gradually adheres to the inner wall of the cone 40, which strengthens the adhesion between the first positioning mechanism and the cone 40, and further improves the overall stability of the cone 40 after positioning.

[0063] like Figures 1-8 As shown, a limiting post 213 is installed inside the mounting part 21. The limiting post 213 is located directly below the positioning post 32. The first airbag structure 23 has a sleeve hole 233 that is adapted to the limiting post 213. The first airbag structure 23 is sleeved on the limiting post 213 through the sleeve hole 233.

[0064] A push sleeve 22 is fitted on the limiting post 213. The push sleeve 22 is slidably connected to the limiting post 213 through a return spring 223. A first pressing plate 221 is installed on the push sleeve 22.

[0065] The outer diameter of the first extrusion plate 221 is larger than the diameter of the sleeve hole 233;

[0066] The extrusion structure is a sleeve 321, the inner diameter of which is larger than the outer diameter of the push sleeve 22;

[0067] During positioning, sleeve 321 is fitted onto the outer surface of push sleeve 22.

[0068] By setting a first extrusion plate 221, a limiting post 213, a pushing sleeve 22, and a return spring 223, the sleeve 321 is used to extrude the first extrusion plate 221, thereby achieving the extrusion operation of the first extrusion plate 221 on the first airbag structure 23. The outer diameter of the first extrusion plate 221 is set to be larger than the diameter of the sleeve hole 233, and the first airbag structure 23 is sleeved on the limiting post 213. This can achieve the limitation of the first extrusion plate 221 on the first airbag structure 23, preventing the first airbag structure 23 from easily running away when it is extruded, and improving the stability of the first airbag structure 23 in limiting the cone 40 when it is extruded.

[0069] It should be noted that by setting the position of the first extrusion plate 221 on the push sleeve 22 and setting the sliding distance of the push sleeve 22 on the limiting post 213, it can be ensured that the first extrusion plate 221 fully extrudes the first airbag structure 23.

[0070] Specifically, the outer surface of the push sleeve 22 is provided with a first external thread 222, and the first extrusion plate 221 is threadedly connected to the push sleeve 22 through the first external thread 222, thereby facilitating the disassembly of the first extrusion plate 221 and making it easier for the first airbag structure 23 to detach from the inside of the first storage slot 212, thus realizing the replacement operation of the first airbag structure 23.

[0071] like Figures 8-9 As shown, the first airbag structure 23 includes a first airbag layer 231, a plurality of second airbag layers 232, a third airbag layer 234 and a plurality of fourth airbag layers 235;

[0072] The third airbag layer 234 is disposed at the center of the first airbag layer 231, and the thickness of the third airbag layer 234 is less than the thickness of the first airbag layer 231.

[0073] Each of the fourth airbag layers 235 is disposed at the center of the side of the corresponding second airbag layer 232 near the inner wall of the cone 40, and the thickness of the fourth airbag layer 235 is less than the thickness of the second airbag layer 232.

[0074] By setting the first airbag structure 23 into a closed form consisting of a first airbag layer 231, multiple second airbag layers 232, a third airbag layer 234, and multiple fourth airbag layers 235, and setting the thickness of the side near the inner wall of the cone 40 and the thickness in contact with the first extrusion plate 221 to be thinner than other parts, it is possible to ensure the overall stability of the first airbag structure 23 while facilitating the contact between the multiple fourth airbag layers 235 and the inner wall of the cone 40.

[0075] like Figures 10-11 As shown, a placement component 24 is detachably connected to the first limiting body 20, and the placement component 24 is fixed to the mounting part 21 by a connector 241;

[0076] The storage component 24 has a second storage slot 242 at the end away from the mounting part 21, and a second airbag structure 25 is installed inside the second storage slot 242;

[0077] The object placement 24 and the second airbag structure 25 are both sleeved on the push sleeve 22;

[0078] A second extrusion plate 225 is installed on the push sleeve 22, and the second extrusion plate 225 is located above the second airbag structure 25;

[0079] The outer surface of the push sleeve 22 is provided with a second external thread 224, and the second extrusion plate 225 is threadedly connected to the push sleeve 22 through the second external thread 224.

[0080] It should be noted that the second airbag structure 25 is a scaled-down version of the first airbag structure 23. Except for the size, it is the same as the first airbag structure 23. The object holder 24 is also provided with a groove on the side of the mounting part 21 to facilitate the limiting of the side of the second airbag structure 25. The outer diameter of the object holder 24 is smaller than the outer diameter of the mounting part 21.

[0081] By setting the second airbag structure 25, when the second positioning mechanism pushes the push sleeve 22, the first airbag structure 23 and the second airbag structure 25, which are distributed at different depths in the cone 40, can limit the cone 40 at different depths, thereby further improving the stability of the cone 40 during the positioning process.

[0082] A method for detecting the area of ​​coating peeling off the surface of an aero-engine cone, comprising the following steps, using an aero-engine cone positioning device to position the cone 40 to be inspected:

[0083] S1: Adjustment of cone 40, control cone 40 to rotate 90° in one go, divide cone 40 into four sides, and calculate the detachment area;

[0084] S2: The area recording method at the intersection of the four dividing lines: For the detached area divided by the four dividing lines, the area of ​​the intersection is recorded only on one side at a time, and the intersection is recorded on the same side for all four times.

[0085] S3: Calculation of the detachment area. Based on the shape of the detachment area on the surface of cone 40, an irregular shape similar to a circle or a triangle is used to calculate the irregular detachment area.

[0086] It should be noted that by setting the mounting part 21 and the placement part 24, when the rubber part 211 limits the cone 40, the mounting part 21 and the placement part 24 will not interfere with the positioning of the inner wall of the cone 40. At the same time, by reasonably setting the length of the mounting part 21 and the sleeve 321, the first positioning mechanism and the second positioning mechanism can meet the detection of cones 40 at different depths. No matter how deep the cone 40 is, it should be noted that the diameter of the rubber part 211 is always smaller than the inner diameter of the large diameter end of the cone 40.

[0087] Furthermore, when setting the positioning post 32, the diameter of the positioning post 32 can be smaller than the diameter of the small diameter end slot of the cone 40;

[0088] Throughout the process, the positioning post 32 and sleeve 321 ensure that the cone 40 remains vertical after positioning, which facilitates subsequent measurement operations.

[0089] During operation, the large-diameter end of the cone 40 is fitted onto the first positioning mechanism. As the smaller inner diameter end of the cone 40 gradually approaches the rubber part 211, the rubber part 211 gradually contacts the inner wall of the cone 40 until the outer wall of the rubber part 211 on the mounting part 21 is completely in contact with the inner wall of the cone 40, thus achieving the initial positioning of the cone 40 by the first positioning mechanism.

[0090] Next, under the action of the cylinder 31, the second positioning mechanism causes the second limiting body 30 to move the positioning post 32 closer to the first limiting body 20. The positioning post 32 gradually extends from the slot at the small diameter end of the cone 40 into the interior of the cone 40. As the positioning post 32 gradually extends into the cone 40, the sleeve 321 on the positioning post 32 gradually fits onto the push sleeve 22 until it gradually contacts the second extrusion plate 225 and extrudes the second extrusion plate 225. At this time, the second airbag structure 25 is extruded by the second extrusion plate 225.

[0091] During the process of the second extrusion plate 225 being extruded, the push sleeve 22 slides along the outer surface of the limiting post 213, causing the first extrusion plate 221 to extrude the first airbag structure 23.

[0092] After the first airbag structure 23 and the second airbag structure 25 are compressed, the thinner bladder layer on the side of the first airbag structure 23 and the second airbag structure 25 near the cone 40 bulges up and supports the inner wall of the cone 40, thereby improving the multi-layer stability of the cone 40 during the positioning process.

[0093] Next, control the cone 40 to rotate 90° in one go, and divide the outer surface of the cone 40 into four surfaces for inspection. During the inspection, the above-mentioned inspection method is used to detect and calculate the area of ​​the coating peeling off the outer surface of the cone 40. The total area after calculation is compared with the standard area. If the peeling area exceeds the area specified by the standard, the outer surface of the cone 40 needs to be fully repaired for the coating peeling off.

[0094] It should be noted that the cone 40 positioned by the positioning device is a hollow cone.

[0095] In summary, compared with existing technologies, it has the following beneficial effects:

[0096] 1. By setting up a first positioning mechanism and a second positioning mechanism, the cone 40 is initially positioned using the first positioning mechanism, and a second positioning is performed after the initial positioning using the second positioning mechanism. This solves the problem in the prior art where, when positioning the cone 40 to be tested, the outer surface of the cone 40 is smooth and curved, and the positioning component used for measurement and fixation cannot fully fit the cone 40 during measurement, resulting in low overall stability of the cone 40 and low accuracy in measuring the surface area of ​​the cone 40.

[0097] 2. At the same time, when setting the first positioning mechanism and the second positioning mechanism, the components of the first positioning mechanism and the second positioning mechanism used to position the cone 40 are located inside the cone 40 and will not contact the outer surface of the cone 40, thus preventing the outer surface from being blocked. This prevents the positioning components from contacting the outer surface of the cone 40 when the first positioning mechanism and the second positioning mechanism position the cone 40, which would cause incomplete detection of the detachment area of ​​the outer surface of the cone 40 and lead to errors in the detection results.

[0098] 3. By setting an installation part 21 on the first limiting body 20 and setting a first airbag structure 23 inside the installation part 21, and setting the first airbag structure 23 as a first airbag layer 231 and multiple second airbag layers 232, during positioning, the second airbag layers 232 on the first airbag structure 23 gradually fit with the inner sidewall of the cone 40, which strengthens the fit between the first positioning mechanism and the cone 40, and further improves the overall stability of the cone 40 after positioning.

[0099] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0100] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aircraft engine cone positioning device for positioning a cone (40) to be inspected, comprising a support base (10), characterized in that: The support base (10) is equipped with a first positioning mechanism and a second positioning mechanism, with the second positioning mechanism located above the first positioning mechanism. The support base (10) is also equipped with a cylinder (31), which controls the second positioning mechanism to move closer to or away from the first positioning mechanism. The first positioning mechanism is installed on the side of the support base (10) closest to it. The first positioning mechanism includes a first limiting body (20), a mounting part (21), and a rubber component (211). The mounting part (21) is installed on the end of the first limiting body (20) closest to the second positioning mechanism and is rotatably connected to the first limiting body (20). The rubber component (211) is sleeved on the outer surface of the mounting part (21) and fixed to it. 211) is frustum-shaped; the diameter of the rubber part (211) is smaller than the diameter of the large diameter end groove of the cone (40), and the cone (40) is sleeved on the first positioning mechanism through the large diameter end groove of the cone (40); when the first positioning mechanism is positioned, the outer side wall of the rubber part (211) abuts against the inner side wall of the cone (40), and the rubber part (211) is used for the initial positioning of the cone (40); the second positioning mechanism includes a second limiting body (30) and a positioning post (32), the side of the second limiting body (30) near the support seat (10) is slidably connected to the support seat (10) through a sliding groove under the action of the cylinder (31), and the positioning post (32) is installed on the side of the second limiting body (30) near the first positioning mechanism and is rotatably connected to the second limiting body (30); When the second positioning mechanism is in position, the positioning pin (32) is under the action of the cylinder (31) and enters the interior of the cone (40) through the slot at the small diameter end of the cone (40). The positioning pin (32) is used for the secondary positioning of the cone (40). The mounting part (21) has a first storage slot (212) at one end near the second limiting body (30), and a first airbag structure (23) is installed inside the first storage slot (212); the first airbag structure (23) includes a first airbag layer (231), a plurality of second airbag layers (232), a third airbag layer (234) and a plurality of fourth airbag layers (235); The first airbag layer (231) and multiple second airbag layers (232) form a closed first airbag structure (23). The multiple second airbag layers (232) are all connected to the first airbag layer (231), and the multiple second airbag layers (232) are integrally formed with the first airbag layer (231). The multiple second airbag layers (232) are arranged around the first airbag layer (231). The mounting part (21) has multiple slots that correspond one-to-one with the second airbag layers (232). Each second airbag layer (232) passes through the corresponding slot and is limited by the mounting part (21). The positioning post (32) has a compression structure installed at one end near the first limiting body (20). During positioning, the compression structure contacts the first airbag structure (23) and compresses the first airbag structure (23). The third airbag layer (234) is disposed at the center of the first airbag layer (231), and the thickness of the third airbag layer (234) is less than the thickness of the first airbag layer (231); each of the fourth airbag layers (235) is disposed at the center of the side of the corresponding second airbag layer (232) near the inner wall of the cone (40), and the thickness of the fourth airbag layer (235) is less than the thickness of the second airbag layer (232).

2. The aircraft engine cone positioning device as described in claim 1, characterized in that: The mounting part (21) is equipped with a limiting post (213), which is located directly below the positioning post (32). The first airbag structure (23) has a sleeve hole (233) that is adapted to the limiting post (213). The first airbag structure (23) is sleeved on the limiting post (213) through the sleeve hole (233). A push sleeve (22) is sleeved on the limiting post (213). The push sleeve (22) is slidably connected to the limiting post (213) through a return spring (223). A first extrusion plate (221) is installed on the push sleeve (22). The outer diameter of the first extrusion plate (221) is larger than the diameter of the sleeve hole (233). The extrusion structure is a sleeve (321), and the inner diameter of the sleeve (321) is larger than the outer diameter of the push sleeve (22). During positioning, the sleeve (321) is sleeved on the outer surface of the push sleeve (22).

3. The aircraft engine cone positioning device as described in claim 2, characterized in that: The outer surface of the push sleeve (22) is provided with a first external thread (222), and the first extrusion plate (221) is threadedly connected to the push sleeve (22) through the first external thread (222).

4. The aircraft engine cone positioning device as described in claim 3, characterized in that: The first limiting body (20) is detachably connected to a placement component (24), which is fixed to the mounting part (21) by a connector (241). The outer diameter of the placement component (24) is smaller than the outer diameter of the mounting part (21). A second placement groove (242) is provided at one end of the placement component (24) away from the mounting part (21). A second airbag structure (25) is installed inside the second placement groove (242). The placement component (24) and the second airbag structure (25) are both sleeved on the push sleeve (22). A second extrusion plate (225) is installed on the push sleeve (22). The second extrusion plate (225) is located above the second airbag structure (25). A second external thread (224) is provided on the outer surface of the push sleeve (22). The second extrusion plate (225) is threadedly connected to the push sleeve (22) through the second external thread (224).

5. The aircraft engine cone positioning device as described in claim 1, characterized in that: Multiple second airbag layers (232) are equidistantly distributed around the outer periphery of the first airbag layer (231).

6. The aircraft engine cone positioning device as described in claim 1, characterized in that: The first limiting body (20) is equipped with a geared motor (201), and the output end of the geared motor (201) is fixedly connected to the mounting part (21).

7. The aircraft engine cone positioning device as described in claim 1, characterized in that: The outer surface of the positioning post (32) is fitted with an elastic sleeve.

8. A method for detecting the surface coating peeling area of ​​an aero-engine cone, comprising using the aero-engine cone positioning device according to any one of claims 1-6 for positioning, characterized in that: Includes the following steps: S1: Adjustment of cone (40): Control cone (40) to rotate 90° in one go, divide cone (40) into four sides, and calculate the area of ​​detachment; S2: The area recording method at the intersection of the four dividing lines: For the detached area divided by the four dividing lines, the area of ​​the intersection is recorded only on one side at a time, and the intersection is recorded on the same side for all four times. S3: Calculation of the area of ​​detachment. Based on the shape of the detachment area on the surface of the cone (40), an irregular shape similar to a circle or a triangle is used to calculate the irregular detachment area.

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