A honeycomb seal structure abrasion depth measuring device and method

Abstract

The application discloses a honeycomb sealing structure grinding trace depth measuring device, which comprises a base plate and probes, wherein the base plate is provided with a reference surface, and a plurality of probes are movably arranged on the base plate along an axial direction and are arranged perpendicularly to the reference surface. The device can perform profile measurement on a surface of the honeycomb sealing structure, avoids interference of pores on the surface of the honeycomb sealing structure on measurement of the grinding trace depth, and effectively improves measurement efficiency and accuracy. The application further provides a honeycomb sealing structure grinding trace depth measuring method.

Description

Technical Field

[0001] This invention belongs to the field of aero-engines, and specifically relates to a device and method for measuring the wear depth of a honeycomb sealing structure. Background Technology

[0002] Aero engines employ multi-stage rotor structures with significant differences in operating pressure between rotors. Therefore, sealing structures are necessary between stages to prevent high-pressure airflow from downstream stages from leaking into upstream stages or lubricating oil from the lubrication chamber. Honeycomb-grip sealing structures are commonly used in aero engines, employing a combination of grip and honeycomb structures to achieve a sealing effect. In actual operation, the tips of the grips frequently cut into the honeycomb structure, creating wear marks. Over long-term service, this leads to significant wear of the honeycomb structure, resulting in a decline in sealing effectiveness. Therefore, measuring the wear mark depth of the honeycomb sealing structure is crucial for assessing its service life. However, the surface of the honeycomb sealing structure itself contains honeycomb-like pores. Conventional depth gauges, laser rangefinders, and coordinate measuring machines can easily confuse the depth of these pores with the wear mark depth of the honeycomb sealing structure, making accurate measurement results difficult to obtain. Summary of the Invention

[0003] The purpose of this invention is to provide a device for measuring the wear depth of a honeycomb sealing structure, capable of accurately measuring the wear depth of the honeycomb structure. This invention also provides a method for measuring the wear depth of a honeycomb sealing structure.

[0004] According to one aspect of the present invention, a device for measuring the wear depth of a honeycomb sealing structure is provided. The device includes a substrate and probes. The substrate has a measurement reference surface, and a plurality of probes are axially movably mounted on the substrate and arranged in a straight line perpendicular to the reference surface.

[0005] The probes arranged in a straight line can mimic the honeycomb structure of the measurement area, thereby distinguishing the bottom of the honeycomb structure pores from the wear area during measurement, achieving rapid and effective measurement, and improving the efficiency and accuracy of wear measurement.

[0006] Furthermore, in some embodiments, the probe diameter is set to 1 / 4 to 1 / 2 of the maximum width of the pores in the honeycomb structure to be tested. A thinner probe can be easily inserted into the bottom of the pores in the sealed honeycomb structure.

[0007] Furthermore, in some embodiments, the gap between the probes is smaller than the wall thickness between the pores of the honeycomb structure to be measured. The probe gap should not be greater than the wall thickness between the pores of the honeycomb structure to avoid the walls of the honeycomb structure becoming embedded between the probes, which would prevent accurate measurement of the wear track depth.

[0008] Furthermore, in some embodiments, the substrate includes two clamping plates, with the probe clamped between the two clamping plates. The clamping plates effectively fix the probe and provide damping for its sliding.

[0009] Furthermore, in some embodiments, a measuring device is provided on the substrate to measure the length by which the probe moves relative to the measuring reference surface. Providing a measuring device on the substrate enables rapid measurement of the depth corresponding to the probe.

[0010] Furthermore, in some embodiments, the measuring device is a mechanical ruler.

[0011] Furthermore, in some embodiments, the probe is provided with scale lines.

[0012] Furthermore, in some embodiments, the measuring device includes multiple substrates and multiple sets of probes arranged in an array. The probe array can perform surface contouring of the honeycomb sealing structure, increasing the measurement range.

[0013] According to another aspect of the present invention, a method for measuring the wear depth of a honeycomb sealing structure is provided. The method includes the following steps: setting multiple measuring points on the sealing surface of the honeycomb sealing structure, such that at least some of the measuring points fall within the area where the wear is located, and the distance between adjacent measuring points does not exceed 1 / 2 of the maximum width of the pores in the honeycomb sealing structure; measuring the distances between the multiple measuring points relative to the surface of the honeycomb sealing structure, taking the maximum value as the pore depth of the honeycomb sealing structure, and taking the values ​​less than the pore depth as the measured wear depth. This method enables contouring and measurement of the honeycomb sealing structure, distinguishing the bottom of the pores from the wear marks, thereby improving measurement efficiency and accuracy.

[0014] Furthermore, the method employs the honeycomb structure wear depth measuring device from any of the foregoing embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a honeycomb sealing structure wear depth measuring device in one embodiment;

[0016] Figure 2 This is a schematic diagram of the engine sealing structure in one embodiment;

[0017] Figure 3 This is a schematic diagram of the wear marks on the honeycomb sealing structure in one embodiment;

[0018] Figure 4 This is a schematic diagram of the probe structure in one embodiment;

[0019] Figure 5This is a schematic diagram illustrating the process of measuring wear marks on a honeycomb sealing structure in one embodiment;

[0020] Figure 6 This is a schematic diagram of a device for measuring the depth of wear marks on a honeycomb sealing structure after measurement, as shown in one embodiment.

[0021] The purpose of the above-described drawings is to provide a detailed description of the invention so that those skilled in the art can understand the technical concept of the invention, and not to limit the invention. For the sake of brevity, the above-described drawings only schematically illustrate the structures related to the technical features of the invention, and do not depict the complete device and all details strictly according to actual scale. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0023] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment herein. The phrase appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it limited to mutually exclusive, independent, or alternative embodiments. Those skilled in the art will understand that the embodiments herein can be combined with other embodiments without causing structural conflicts.

[0024] In this description, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," etc., should be interpreted broadly, referring to movable connections, fixed connections, or integration. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this application based on the specific circumstances.

[0025] In this description, terms such as "upper," "lower," "left," "right," "lateral," "longitudinal," "height," "length," and "width," which indicate orientation or positional relationships, are intended to accurately describe the embodiments and simplify the description, rather than limiting the parts or structures involved to have a specific orientation, or to be installed or operated in a specific orientation, and should not be construed as limiting the embodiments in this document.

[0026] In this description, terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating relative importance or limiting the number, specific order, or primary / secondary relationship of the described technical features. In this description, "multiple" means at least two.

[0027] One embodiment of the present invention provides a device for measuring the depth of wear marks on a honeycomb sealing structure.

[0028] In one embodiment, the local structure of the aero-engine to be tested is as follows: Figure 2As shown. 31 is the low-pressure stage rotor blade, 32 is the stator blade, and 33 is the high-pressure stage rotor blade. The low-pressure stage rotor blade 31 is located in the low-pressure chamber 34, and the high-pressure stage rotor blade 33 is located in the high-pressure chamber 35. A sealing structure is needed between the low-pressure chamber 34 and the high-pressure chamber 35 to prevent high-pressure airflow from leaking into the front stage, thus reducing engine power. Therefore, a grate-honeycomb sealing structure composed of grates 36 and a honeycomb structure 4 is provided between the low-pressure chamber 34 and the high-pressure chamber 35. The grate 36 rotates with the engine rotor, while the honeycomb structure 4 is installed on the stator blade and remains stationary relative to the casing. During engine rotation, the sealing structure formed between the ends of the grate 36 and the honeycomb structure 4 obstructs airflow, preventing gas from the high-pressure chamber 35 from leaking into the low-pressure chamber 34. However, simultaneously, during the rotation of the grate 36, the ends of the grate 36 may cut into the surface of the honeycomb structure 4, such as... Figure 3 As shown, wear marks 42 are formed on the surface of the honeycomb structure 4. To detect the wear condition of the honeycomb structure 4, the depth d of the wear marks 42 needs to be measured to determine whether the wear affects the normal function of the honeycomb structure 4. However, since the surface of the honeycomb structure 4 is covered with pores 40, conventional measuring tools can easily reach the bottom of the honeycomb structure 4 and measure the total depth D of the pores 40, leading to confusion in the measurement data and seriously affecting the detection efficiency.

[0029] To address the aforementioned problems, one embodiment of the present invention provides a device for measuring the wear depth of a honeycomb sealing structure, the structure of which is as follows: Figure 1 As shown, the device includes a substrate 1 and probes 2, wherein one end face of the substrate 1 is a measurement reference surface 10, and multiple probes 2 are arranged in a straight line perpendicular to the measurement reference surface 10. Each probe 2 can slide relative to the substrate along its respective axis. This device is used to detect the depth of wear marks in the honeycomb sealing structure of an aero-engine.

[0030] In a preferred embodiment, the diameter of the probe 2 is set to 1 / 4 to 1 / 2 of the maximum width of the pore 40. In other preferred embodiments, the gap between adjacent probes 2 is less than the wall thickness of the wall 41 forming the pore 40.

[0031] In some preferred embodiments, the substrate 1 is formed by splicing two clamping plates 1a and 1b, and the probe 2 is clamped between the clamping plates 1a and 1b. The clamping surfaces of the clamping plates 1a and 1b may be provided with slides for mounting the probe 2 and to provide damping for the sliding of the probe 2 to prevent the probe 2 from slipping off. In some embodiments, the substrate 1 may also be set as a whole, with holes drilled in the reference surface to mount each probe 2.

[0032] In some embodiments, a measuring device is provided on the substrate 1 to measure the sliding distance of each probe 2. In a preferred embodiment, such as Figure 5As shown, the measuring device is configured as a mechanical scale 11 fixed to the surface of the substrate 1. In a further preferred embodiment, as... Figure 4 As shown, the surface of probe 2 is provided with scale lines 21 to determine the relative position of probe 2. In other embodiments, electronic measuring devices, such as resistive displacement sensors or capacitive displacement sensors, can also be used to determine the position of probe 2. In other embodiments, the measuring device can be omitted, and other general-purpose measuring tools, such as vernier calipers, can be used to determine the position of probe 2 one by one.

[0033] In some embodiments, multiple substrates 1 are provided, and probes 2 on each substrate 1 are distributed in an array.

[0034] In a preferred embodiment, such as Figure 5 The method of using the honeycomb seal structure wear depth measuring device shown is as follows:

[0035] First, return each probe 2 to its original position and align them. Then, bring the measuring device close to the honeycomb structure 4 to be measured, with each probe 2 corresponding to a measurement point.

[0036] Next, bring the measuring device close to the measuring surface of the honeycomb structure 4 until the measuring reference surface 10 is completely flat against the surface of the honeycomb structure 4, so that each probe 2 conforms to the shape of the measuring surface.

[0037] Subsequently, the measuring device was removed vertically, and its state diagram was obtained. Figure 6 As shown. After the measurement is completed, probe 2 is positioned in one of three devices. Type 2a probe moves the shortest distance, penetrating the pores 40 of the honeycomb structure 4 and contacting the bottom of the pores 40. Type 2b probe moves the longest distance, its end flush with the reference surface, contacting the unworn wall 41. Type 2c probe moves between types 2a and 2b, contacting the remaining wall within the wear mark 42; its distance reflects the wear mark depth of the honeycomb structure 4. By comparing the readings of the scale line 21 on probe 2c relative to the mechanical scale 11, the specific depth of the wear mark 42 can be obtained.

[0038] In other embodiments, the above method may employ the honeycomb sealing structure wear depth measuring device provided in any of the foregoing embodiments.

[0039] In other embodiments, other methods may also be used, such as arranging multiple measurement points with a spacing not exceeding 1 / 2 of the width of the pore 40 to measure the sealing surface of the honeycomb structure 40, analyzing the data of each measurement point, comparing the measured value with the distance to the surface of the honeycomb structure 40, where the largest value is the depth D of the pore 40, and the resin depth less than the pore depth D is the depth d of the wear mark 42.

[0040] The purpose of the above embodiments is to provide a further detailed description of the present invention in conjunction with the accompanying drawings, so that those skilled in the art can understand the technical concept of the present invention. Within the scope of the claims of the present invention, any optimization or equivalent substitution of the involved part structures or method steps falls within the protection scope of the present invention.

Claims

1. A device for measuring the depth of wear marks on a honeycomb sealing structure, characterized in that, The device includes a substrate and probes. The substrate has a measurement reference surface, and a plurality of probes are axially movably mounted on the substrate and arranged in a straight line perpendicular to the reference surface. The probe diameter is set to 1 / 4 to 1 / 2 of the maximum width of the pores in the honeycomb sealing structure to be tested. The gap between the probes is smaller than the wall thickness between the pores of the honeycomb sealing structure to be tested; The substrate provides sliding damping for the probe.

2. The device for measuring the depth of wear marks on a honeycomb sealing structure according to claim 1, characterized in that, The substrate includes two clamping plates, and the probe is clamped between the two clamping plates.

3. The device for measuring the depth of wear marks on a honeycomb sealing structure according to claim 1, characterized in that, A measuring device is provided on the substrate to measure the length of the probe moving relative to the measuring reference surface.

4. The device for measuring the depth of wear marks on a honeycomb sealing structure according to claim 3, characterized in that, The measuring device is a mechanical ruler.

5. The device for measuring the depth of wear marks on a honeycomb sealing structure according to claim 4, characterized in that, The probe is equipped with scale lines.

6. The device for measuring the depth of wear marks on a honeycomb sealing structure according to claim 1, characterized in that, It includes multiple substrates and multiple sets of probes, the probes being arranged in an array.

7. A method for measuring the wear depth of a honeycomb sealing structure, characterized in that, The method employs the honeycomb sealing structure wear depth measuring device as described in any one of claims 1 to 6, and includes the following steps: Multiple measuring points are set on the sealing surface of the honeycomb sealing structure, such that at least some of the measuring points fall in the area where the wear marks are located, and the distance between adjacent measuring points does not exceed 1 / 2 of the maximum width of the pores in the honeycomb sealing structure; The distances between the plurality of measurement points and the surface of the honeycomb sealing structure are measured, and the maximum value measured is the pore depth of the honeycomb sealing structure, and the values ​​less than the pore depth are the measured wear depths.

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