Method for measuring wear of circumferential floating ring seal for aero-engine

Abstract

The application discloses a kind of determination methods of the wear amount of circumferential floating ring seal for aero-engine, obtains the first surface topography of circumferential sealing surface before floating ring or floating ring seal test piece uses or tests;First surface topography is unfolded to obtain first surface profile;After floating ring or floating ring seal test piece uses or tests, the second surface topography of circumferential sealing surface is obtained;Second surface topography is unfolded to obtain second surface profile;Based on first surface profile and second surface profile, wear depth data and wear area data are obtained;Based on wear depth data and wear area data, calculate wear volume and / or wear mass.The present application is used to solve the problem that the determination method of the wear amount of floating ring seal in the prior art is relatively single, low in precision, and large in error, to provide a new wear amount determination method in addition to the traditional weighing method, to reduce external interference, to improve the wear amount determination precision of the circumferential floating ring seal for aero-engine, and to reduce the purpose of determination error.

Description

Technical Field

[0001] This invention relates to the field of sealing testing technology for aero-engines, specifically to a method for determining the wear of circumferential floating ring seals used in aero-engines. Background Technology

[0002] Floating ring seals are a new type of shaft end seal, characterized by a smaller sealing gap and better self-aligning function, and have attracted widespread attention in the field of aero-engine sealing. The working principle of a floating ring seal is that during normal operation, the floating ring seal uses a rigid fluid membrane to separate the sealing ring from the runway surface, thereby preventing gas leakage. The sealing end face, under the combined action of a spring and the gas pressure difference, adheres to the inner side of the housing to prevent radial gas leakage.

[0003] When a floating ring seal is working normally, its end face experiences friction and wear with the housing, but it does not contact its mating part (rotor). Therefore, the life of the floating ring seal is closely related to friction and wear. In addition, the friction and wear between the inner surface of the floating ring seal and the raceway has a significant impact on the seal's life. Friction and wear in this area can lead to excessive leakage, and in severe cases, it can even cause the floating ring seal to fail.

[0004] In existing technologies, the measurement of wear on sealing rings is mostly focused on the wear of end face seals, and the measurement methods are primarily performed using micrometers. This is not suitable for measuring the wear on the inner circumference of the floating ring. Furthermore, when using a micrometer to measure wear, the measurement is often affected by variations in the clamping force and angle between the micrometer and the sealing surface, which can introduce significant errors in the obtained measurement of seal wear.

[0005] Existing technologies for measuring wear of circumferential seals (cylindrical seal type) are limited to gravimetric methods. This method is affected by different materials. For soft materials, especially graphite commonly used in circumferential floating ring seals of aero-engines, graphite has good adsorption properties, which leads to the adsorption of wear media during the wear process, resulting in inaccurate wear weight differences. Furthermore, for seals used in aero-engines, especially under two-phase oil-gas conditions, if cleaning and drying are performed directly before and after wear, residual test media will always remain in the pores of the soft material, making it impossible to obtain accurate wear measurements, and even leading to a "heavier with wear" phenomenon. In addition, traditional gravimetric methods for measuring wear require disassembly, cleaning, and drying of the floating ring before and after wear. This process is highly susceptible to human and environmental factors, easily resulting in inaccurate and large errors, affecting subsequent research.

[0006] In summary, the existing methods for testing the wear of floating ring seals are relatively simple and mostly target the wear measurement of conventional end face seals. Therefore, the existing technology has significant limitations in measuring the wear of circumferential floating ring seals used in aero engines. Summary of the Invention

[0007] This invention provides a method for measuring the wear of circumferential floating ring seals for aero engines, addressing the problems of existing methods for measuring wear of floating ring seals being relatively simple, having low accuracy, and large errors. It provides a new testing method that breaks through the traditional single weighing method to obtain wear, thereby improving the accuracy of wear measurement of circumferential floating ring seals for aero engines and reducing measurement errors.

[0008] This invention is achieved through the following technical solution:

[0009] A method for determining the wear of a circumferential floating ring seal for an aero-engine, comprising:

[0010] Before the use or testing of the floating ring or floating ring seal test piece, the first surface morphology of the circumferential sealing surface is obtained;

[0011] Unfold the first surface topography into a plane to obtain the first surface contour;

[0012] After the use or testing of the floating ring or floating ring seal test piece, the second surface morphology of the circumferential sealing surface is obtained;

[0013] The second surface topography is unfolded into a plane to obtain the second surface profile;

[0014] Based on the first surface profile and the second surface profile, wear depth data and wear area data are obtained;

[0015] Based on the wear depth data and wear area data, calculate the wear volume and / or wear mass.

[0016] To address the shortcomings of existing methods for measuring the wear of floating ring seals, such as their limited scope, low accuracy, and significant errors, this invention proposes a method for measuring the wear of circumferential floating ring seals used in aero-engines. This method can measure either a formally commissioned floating ring or a floating ring seal test piece. When the object of measurement is a formally commissioned floating ring, a first surface morphology and a second surface morphology are obtained for the floating ring before and after use. When the object of measurement is a floating ring seal test piece, a first surface morphology and a second surface morphology are obtained for the floating ring seal test piece before and after testing. Since the object of measurement in this application is a floating ring used in aero-engines, the sealing surface is a circumferential sealing surface. Therefore, this method requires unfolding the first and second surface morphologies into planes, converting the circumferential curved surface information into planar information, and thus obtaining the first and second surface profiles respectively. This yields the surface morphologies on the circumferential sealing surface before and after use or testing. Subsequently, the two obtained surface morphologies are compared and analyzed to obtain data on wear depth and wear area, ultimately calculating the wear volume and wear mass.

[0017] This application abandons the existing technical approach of using the weighing method to determine wear, and proposes a novel method for measuring the wear of floating ring seals. This proposed method is unaffected by material properties and avoids significant deviations in wear measurement caused by the adsorption properties of graphite in the circumferential floating rings of aero-engines. This significantly improves the accuracy of wear measurement for circumferential floating rings used in aero-engines. Furthermore, this application avoids the complex processes of disassembling, cleaning, and drying the floating ring before and after wear, effectively reducing interference from human and environmental factors, which also contributes to improved measurement accuracy and reduced measurement errors. In addition, this application transforms cylindrical surface wear information into end-face wear problems, greatly simplifying the process and reducing the difficulty of three-dimensional surface morphology analysis of the seal.

[0018] Furthermore, the first surface morphology or the second surface morphology is obtained by the following method:

[0019] The surface morphology of the circumferential sealing surface is replicated using a cured molded material, and the morphology replicated on the surface of the cured molded material is used as the first surface morphology or the second surface morphology.

[0020] Clearly, both the first and second surface morphologies can be obtained using the method described in this scheme; the only difference is that the objects of application are the circumferential sealing surfaces of the floating ring before and after use or testing, respectively. This scheme innovatively employs a cured molded material to replicate the surface morphology of the circular sealing surface, facilitating the efficient and accurate conversion of cylindrical surface information into end-face information, which is beneficial for the subsequent effective extraction of the surface profile.

[0021] It should be noted that the cured material in this solution can be any material with good microscopic surface morphology expression performance and good ductility, and a smooth surface after molding, which is available in the prior art. Those skilled in the art can select any suitable material to achieve its function based on actual needs and existing technology, such as resin materials, polymer materials, silicone rubber materials, etc. that can replicate surface morphology. In addition, the cured material in this solution can be organic or inorganic.

[0022] Preferably, the cured molded product is a resin material; it has good ductility, a smooth surface after molding, and a soft texture, which is conducive to accurately replicating the microscopic surface morphology and maintaining morphological stability after being unfolded into a plane.

[0023] Furthermore, the method for obtaining the first surface profile includes: unfolding the cured molded article with the first surface morphology circumferentially to obtain a first end face, obtaining protrusion information on the first end face, and obtaining the first surface profile.

[0024] The method for obtaining the second surface profile includes: unfolding the cured molded article with the second surface morphology circumferentially to obtain the second end face, obtaining the protrusion information on the second end face, and obtaining the second surface profile.

[0025] In this solution, the protrusions replicated on the surface of the cured molded object correspond to the wear on the sealing surface of the floating ring; therefore, by obtaining the protrusion information of the first end face and the second end face, this solution can obtain the first surface profile and the second surface profile respectively.

[0026] Furthermore, by scanning with a 3D ultra-depth surface profiler or a line laser scanner, information on the protrusions on the first and second planes is obtained, thereby obtaining the first and second surface profiles.

[0027] Furthermore, the protrusion information includes the height, contour curve, and projected area of ​​all protrusions. The height of the protrusion characterizes the wear depth; the contour curve characterizes the morphology of each wear area; and the projected area characterizes the size of the wear range. Based on these three parameters, the wear changes before and after use or testing can be clearly identified.

[0028] Furthermore, methods for obtaining wear depth data include:

[0029] Extract the protrusion height data within the first surface contour and the second surface contour, respectively;

[0030] Register the first surface profile and the second surface profile, and calculate the difference in the protrusion height of each region to obtain wear depth data.

[0031] This solution can be understood as extracting wear depth data before and after use or testing, then registering the first surface profile before use or testing with the second surface profile after use or testing to determine which areas are new wear areas caused by use or testing and which areas are wear areas that are aggravated by use or testing. By comparing the depth of each wear area before use or testing, the wear depth data caused by the current use or testing can be obtained.

[0032] Further methods for obtaining wear area data include:

[0033] The wear area is calibrated based on the wear depth data;

[0034] Image data of each wear region on the first surface contour and the second surface contour are acquired respectively, and edge image processing is performed to obtain the first wear region contour dataset and the second wear region contour dataset respectively.

[0035] By comparing the first wear region contour dataset with the second wear region contour dataset, the wear area of ​​each wear region is obtained.

[0036] This solution first identifies all wear areas based on wear depth data, then obtains initial area images before and after wear. Using edge image processing technology, it generates a first wear area contour dataset and a second wear area contour dataset, corresponding to the damaged area contour data before and after this wear event, respectively. By comparing the damaged area contour data before and after wear, the wear area generated during this use or test can be obtained. This solution utilizes mature edge image processing technology to process irregular wear areas into approximately regular shapes, making it easier to obtain the wear width and length of the floating ring seal, thus revealing the changes in the wear area and facilitating the calculation of the wear area.

[0037] Furthermore, the method for calculating the wear volume includes: matching the obtained wear depth data and wear area data, multiplying the corresponding wear depth data by the corresponding wear area data, and summing the results to obtain the wear volume. This scheme can calculate the wear area of ​​each wear region, the corresponding wear depth of each wear region, and thus the wear volume of each wear region, ultimately obtaining the total wear volume.

[0038] Furthermore, methods for calculating wear quality include multiplying the wear volume by the density of the floating ring or floating ring seal test piece to obtain the wear quality.

[0039] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0040] 1. This invention provides a method for determining the wear amount of circumferential floating ring seals used in aero-engines. It abandons the existing method of using gravimetric analysis to determine wear amount and proposes a novel method for measuring the wear amount of floating ring seals. This proposed method overcomes the limitations of traditional gravimetric analysis, is unaffected by uncertainties such as human error, environment, and cleaning during weighing, and is also unaffected by material properties. It avoids serious deviations in wear amount measurement due to the adsorption properties of graphite in the aero-engine circumferential floating ring, thus improving the accuracy of wear amount measurement for aero-engine circumferential floating rings.

[0041] 2. The present invention provides a method for determining the wear of a circumferential floating ring seal for an aero-engine. Compared with the traditional weighing method, this method avoids the complex process of disassembling, cleaning, and drying the floating ring before and after wear, effectively reducing the interference of human and environmental factors. It also helps to improve the measurement accuracy and reduce the measurement error.

[0042] 3. The present invention provides a method for measuring the wear of a circumferential floating ring seal for an aero-engine. It uses a cured molding material to replicate the surface morphology of the circular sealing surface, which facilitates the efficient and accurate conversion of cylindrical surface information into end-face information, and is beneficial for the subsequent effective extraction of the surface profile. At the same time, the cured molding material can be used to convert cylindrical surface wear information into end-face wear problems, which greatly simplifies the process and reduces the difficulty of three-dimensional surface morphology analysis of the seal.

[0043] 4. The present invention provides a method for measuring the wear of a circumferential floating ring seal for an aero-engine, which can quickly obtain wear depth information and wear contour area, and can easily obtain wear volume. Combined with the density of the floating ring seal material, accurate wear quality can be obtained. Attached Figure Description

[0044] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0045] Figure 1 This is a flowchart illustrating a specific embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram of the experimental device in a specific embodiment of the present invention;

[0047] Figure 3 This is a schematic diagram of the scraping and rubbing components in the test apparatus of a specific embodiment of the present invention;

[0048] Figure 4 This is a schematic diagram of another embodiment of the scraping and rubbing component in the test apparatus of a specific embodiment of the present invention;

[0049] Figure 5 This is a schematic diagram of the positioning component in the test apparatus of a specific embodiment of the present invention;

[0050] Figure 6 This is a schematic diagram of the power component in the test device of a specific embodiment of the present invention.

[0051] 12-Shell, 13-Floating ring clamp, 14-Cam, 15-Protrusion, 16-Support saddle, 17-Test bench;

[0052] 21-Glander cap, 22-Sleeve, 23-Elastic element;

[0053] 32-Main spindle, 33-End cover, 34-Ventilation hole, 35-Coupling, 36-Motor, 37-Upper housing, 38-Lower housing. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are for explaining the invention only and are not intended to limit the invention. In the description of this application, it should be understood that terms such as "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "high," "low," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application.

[0055] Example 1:

[0056] like Figure 1 The method for determining the wear of a circumferential floating ring seal for an aero-engine, as shown, includes the following steps:

[0057] S1. Before the use or testing of the floating ring or floating ring seal test piece, obtain the first surface morphology of the circumferential sealing surface; specifically, use a cured molded material to replicate the surface morphology of the circumferential sealing surface at this time as the first surface morphology.

[0058] S2. Unfold the first surface morphology into a plane to obtain the first surface contour;

[0059] S3. After the use or testing of the floating ring or floating ring seal test piece, a second surface morphology of the circumferential sealing surface is obtained; specifically, a new cured molded material is used to replicate the surface morphology of the circumferential sealing surface at this time, as the second surface morphology.

[0060] S4. Unfold the second surface topography into a plane to obtain the second surface profile;

[0061] S5. Based on the first surface profile and the second surface profile, use existing instruments such as a three-dimensional ultra-depth surface profiler and / or a line laser scanner to scan and compare the scanning results of the first surface profile and the second surface profile to obtain the depth information of the floating ring before and after friction and wear, and further obtain the wear depth value.

[0062] In addition, the surface contour information of the replicated organic curing molded product was measured. At the same time, the wear contour area information of the floating ring was obtained by combining the actual friction and wear conditions of the floating ring seal and the geometric structural parameters of the floating ring seal. The wear contour area was then processed to obtain the wear area.

[0063] S6. Based on the wear depth data and wear area data, calculate the wear volume and / or wear mass;

[0064] The method for calculating wear volume includes: matching the obtained wear depth data and wear area data, multiplying the corresponding wear depth data by the corresponding wear area data, summing them up, and obtaining the total wear volume.

[0065] Methods for calculating wear mass include multiplying the total wear volume by the density of the floating ring or floating ring seal test piece to obtain the wear mass.

[0066] The cured molded product in this embodiment is made of resin material, preferably a resin material for molding bodies, such as the resin material disclosed in Chinese Patent CN114096571B.

[0067] Preferably, the method of replicating the surface morphology of the circumferential sealing surface by using a cured molded material can be achieved by attaching the uncured cured molded material to the surface of the circumferential sealing surface and pressing it, and waiting for it to cure; or by injecting the cured molded material in a flowing state into the interior of the floating ring structure to achieve the replication of the surface morphology; or by using other methods of replicating the surface morphology that can be achieved by those skilled in the art.

[0068] This embodiment converts cylindrical surface information into end face information, uses existing technical means to measure the three-dimensional morphology of the sealing surface, and obtains wear depth information and wear contour area by comparing and analyzing the three-dimensional surface morphology before and after wear, and finally calculates the wear amount of the floating ring seal.

[0069] In a more preferred embodiment, the method for obtaining wear depth data includes: extracting protrusion height data within the first surface profile and the second surface profile respectively; registering the first surface profile and the second surface profile, and subtracting the protrusion height in each region to obtain wear depth data.

[0070] In a more preferred embodiment, the method for obtaining wear area data includes: calibrating wear areas based on the wear depth data; acquiring image data of each wear area on a first surface contour and a second surface contour, and performing edge image processing to obtain a first wear area contour dataset and a second wear area contour dataset; comparing the first wear area contour dataset and the second wear area contour dataset to obtain the wear area of ​​each wear area.

[0071] In a more preferred embodiment, point cloud data representing the three-dimensional morphology can be scanned, divided into grids, and then the average wear depth can be calculated based on each grid, thereby calculating the wear volume corresponding to each wear region.

[0072] Example 2:

[0073] A method for determining the wear of circumferential floating ring seals for aero engines, based on Example 1:

[0074] The method for obtaining the first surface profile includes: unfolding a solidified molded article with a first surface morphology circumferentially to obtain a first end face, obtaining protrusion information on the first end face, and obtaining the first surface profile.

[0075] The method for obtaining the second surface profile includes: unfolding the cured molded article with the second surface morphology circumferentially to obtain the second end face, obtaining the protrusion information on the second end face, and obtaining the second surface profile.

[0076] In this embodiment, the first surface profile and / or the second surface profile are obtained by scanning with a three-dimensional ultra-depth surface profiler or a line laser scanner.

[0077] The protrusion information obtained in this embodiment includes the height, contour curve, and projected area of ​​all protrusions.

[0078] Preferably, the wear depth in this embodiment is obtained by the following method:

[0079] The surface of the unfolded organic curing molded object was radially scanned using a 3D ultra-depth surface profilometer and a line laser scanner to obtain depth information images corresponding to the float ring before and after wear. Based on the initial depth information images, affine transformation was used to register the images to obtain processed depth information images. The processed post-wear depth information was then registered with the processed pre-wear depth information, and the difference was calculated sequentially to obtain the wear depth distribution map of the float ring sealing surface.

[0080] The wear area in this embodiment is obtained through the following technical means:

[0081] First, based on the wear depth distribution map of the floating ring sealing surface, the wear area is marked, and the wear area of ​​the sealing surface is collected to obtain the corresponding wear area contour images before and after the floating ring wears. The obtained wear area contour images are filtered, denoised, and segmented in sequence, and the contour edges are fitted, corrected, and reconstructed to obtain the target edge contour image. Then, the target edge contour image is processed for out-of-contact points to obtain the final wear area contour. The final wear area contours obtained before and after wear are registered and compared to obtain the wear area.

[0082] It should be noted that the registration, image processing, contour extraction, and other techniques used in this embodiment to calculate wear depth, wear area, and compare data before and after wear can all be implemented using existing mature technologies, which are not difficult for those skilled in the art to implement.

[0083] Example 3:

[0084] A method for determining the wear amount of a circumferential floating ring seal for an aero-engine, based on any of the above embodiments, involves testing the floating ring seal test piece using the following testing apparatus, and determining the wear amount during the test process based on the method of this application. The testing apparatus is as follows: Figures 2 to 6 As shown, it includes:

[0085] Positioning components are used to position the test float ring;

[0086] Scraping and rubbing components are used for scraping and / or rubbing the test float ring;

[0087] A power unit, connected to the scraping and rubbing component, is used to drive the scraping and rubbing component to scrape and / or rub against the test float ring;

[0088] A sensing component is used to monitor the force exerted by the scraping and rubbing components on the test float ring;

[0089] Temperature control components are used to control the temperature of the test environment.

[0090] In this embodiment, the positioning assembly includes a housing 12 for accommodating a test floating ring, a plurality of floating mechanisms connected to the housing 12, and a floating ring clamp 13 connected to the floating end of the floating mechanism; the floating ring clamp 13 is located inside the housing 12, and the plurality of floating ring clamps 13 are arranged in a ring. The floating mechanism includes a sleeve 22 connected to the housing 12, a pressure cap 21 connected inside the sleeve 22, and an elastic element 23 located between the pressure cap 21 and the floating ring clamp 13; the floating ring clamp 13 is located at one radially inward end of the sleeve 22. It also includes a preload adjustment mechanism for adjusting the relative position of the pressure cap 21 and the sleeve 22.

[0091] In this embodiment, the sleeves 22 are evenly arranged in the four directions of top, bottom, left and right along the circumference of the housing 12, and the adjacent sleeves 22 maintain a 90° angle. The four spring sleeves are provided with springs of the same model and specifications as elastic elements 23.

[0092] Preferably, the outer wall of the pressure cap 21 is provided with external threads, and the inner wall of the sleeve 22 is provided with matching internal threads. The pressure cap 21 is partially screwed into the sleeve 22 through the threads, and the screwing depth of the pressure cap 21 can be flexibly adjusted, thereby adjusting the preload of the spring. More preferably, a scale can also be provided on the pressure cap 21 to ensure that the force applied in all directions is basically consistent.

[0093] In this embodiment, the scraping and abrasion component is eccentrically arranged inside the housing 12, and the scraping and abrasion component is radially aligned with one of the floating ring clamps 13. Figure 3 and Figure 4 As shown, the scraping and rubbing component includes a cam 14, which has 1 to 3 protrusions 15.

[0094] In a more preferred embodiment, the housing 12 is cylindrical, the sleeve 22 is fixedly passed through the housing 12, the housing 12 is fixed on the support saddle 16, and the support saddle 16 is fixed on the test bench 17.

[0095] In a more preferred embodiment, the sensing component includes a force sensor disposed in each sleeve 22, the force sensor being used to monitor the force of the spring acting on the pressure cap 21 inside the corresponding sleeve.

[0096] The power components, such as Figure 6 As shown, the device includes a main shaft 32 connected to the cam 14 and a motor 36 for driving the main shaft 32 to rotate. One end of the main shaft 32 is connected to the motor 36 via a coupling 35, and the other end is connected to the cam 04. The main shaft 32 is eccentrically mounted relative to the housing 12 to ensure the required eccentricity.

[0097] The main shaft 32 passes through the bearing housing and is rotatably connected to the bearing housing; the bearing housing includes an upper housing 37, a lower housing 38, an end cover 33, a vent 34, and other structures.

[0098] In practical use, the eccentricity of the floating ring seal during the test process can be set according to the actual operating conditions of the floating ring seal in the aero-engine, and the main shaft can be installed in an eccentric position to ensure the required eccentricity.

[0099] In a more preferred embodiment, the cam 14 is detachably connected to the main shaft 32, making it easy to replace the cam 14 with different numbers of protrusions 15 as needed.

[0100] In a more preferred embodiment, the sensing component is also used to monitor the frequency of the scraping and / or rubbing of the test float by the scraping and / or rubbing component, and / or the sensing component is also used to monitor the temperature and / or humidity of the test environment.

[0101] In a more preferred embodiment, the temperature control component includes a temperature regulating device and a heat insulation device. The heat insulation device comprises, from the inside out, a refractory brick layer, a rock wool layer, and a stainless steel layer. The heat insulation device is disposed outside the scraping and abrasion components and the floating mechanism, enclosing them within the internal space.

[0102] In a more preferred embodiment, the temperature control assembly further includes a temperature regulating device and a shaft-end heat dissipation system. The temperature regulating device includes a resistance wire for heating the test environment, preferably Cr. 20 Ni 80 The heating resistance wire is made of a material with a heating power of not less than 1000W; the shaft end heat dissipation system adopts a combination of finned heat dissipation and fan heat dissipation to dissipate heat inside the bearing housing, so as to ensure that the temperature of the corresponding bearing front end meets the working requirements.

[0103] In a more preferred embodiment, a test analysis system is also included, which receives all data monitored by the sensing components for subsequent display and analysis.

[0104] The test apparatus provided in this embodiment can be used to conduct radial scraping and rubbing tests on test floating rings, effectively simulating the scraping of the inner side of the floating ring seal against the runway under engine operating conditions; by controlling the frequency of scraping and / or rubbing, the wear resistance performance of the floating ring seal under service conditions can be tested in a short period of time; it can quickly and effectively excite design defects in the test floating ring, thereby facilitating the determination of the performance of the tested product and providing a scientific and reasonable basis for the verification of floating ring seal products; it can effectively simulate the floating state of the sealing floating ring used in aero-engines, thereby effectively simulating the actual operating conditions of the floating ring gas film seal in aero-engines, making the test results more accurate and reliable; the scraping and rubbing components can continuously scrape and rub the test floating ring at a designated location, which helps to shorten the test time and more quickly and effectively excite possible design defects; it can effectively simulate the harsh high-temperature operating conditions of the aero-engine floating ring seal, thereby making the test results closer to the real service conditions.

[0105] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0106] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Additionally, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.

Claims

1. A method for determining the wear amount of a circumferential floating ring seal for an aero-engine, characterized in that, The application relates to a method for obtaining wear data of a floating ring or floating ring seal test piece, comprising the following steps: obtaining a first surface profile of a circumferential sealing surface before the floating ring or floating ring seal test piece is used or tested; developing the first surface profile into a plane to obtain a first surface contour; obtaining a second surface profile of the circumferential sealing surface after the floating ring or floating ring seal test piece is used or tested; developing the second surface profile into a plane to obtain a second surface contour; obtaining wear depth data and wear area data based on the first surface contour and the second surface contour; calculating wear volume and / or wear mass based on the wear depth data and the wear area data; the first surface profile or the second surface profile is obtained by the following method: reproducing the surface profile of the circumferential sealing surface by using a solidified molding; taking the surface-reproduced profile of the solidified molding as the first surface profile or the second surface profile; the solidified molding is a resin material; the method for obtaining the first surface contour comprises the following steps: developing the solidified molding with the first surface profile in the circumferential direction to obtain a first end face, obtaining protrusion information on the first end face, and obtaining the first surface contour; the method for obtaining the second surface contour comprises the following steps: developing the solidified molding with the second surface profile in the circumferential direction to obtain a second end face, obtaining protrusion information on the second end face, and obtaining the second surface contour.

2. The method of claim 1, wherein the first surface contour and / or the second surface contour is obtained by scanning through a three-dimensional super-depth surface profiler or a line laser scanner.

3. The method of claim 1, wherein the method is used for an aeroengine. the protrusion information comprises the height, contour curve and projection area of all protrusions.

4. The method of claim 1, wherein the method is used for an aeroengine. the method for obtaining the wear depth data comprises the following steps: extracting the protrusion height data in the first surface contour and the second surface contour respectively; aligning the first surface contour and the second surface contour, and subtracting the protrusion height of each region to obtain the wear depth data.

5. The method of claim 1, wherein the method is used for an aeroengine. the method for obtaining the wear area data comprises the following steps: calibrating the wear region based on the wear depth data; obtaining image data of each wear region on the first surface contour and the second surface contour respectively, and performing edge image processing to obtain a first wear region contour data set and a second wear region contour data set respectively; comparing the first wear region contour data set and the second wear region contour data set to obtain the wear area of each wear region.

6. The method of claim 1, wherein the method for calculating the wear volume comprises the following steps: matching the obtained wear depth data and wear area data, multiplying the corresponding wear depth data by the corresponding wear area data, and summing to obtain the wear volume.

7. The method of claim 1, wherein the method is used for an aeroengine. the method for calculating the wear mass comprises the following steps: multiplying the wear volume by the density of the floating ring or floating ring seal test piece to obtain the wear mass.

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