A brush type sealing auxiliary inspection tool

Abstract

This application relates to the technical field of metal brush auxiliary inspection equipment, and more particularly to a brush-type sealing auxiliary inspection fixture. In use, the metal brush to be tested is placed on an annular step, and the bottom of a standard block is inserted into a coaxially arranged centering hole. Since the centering hole and centering groove are coaxial, after installation, the edge of the standard block forms a defined physical reference with the inner diameter of the metal brush and is positioned close to the inner diameter. This insertion and mating structure provides a stable mechanical alignment for measurement, effectively avoiding positioning deviations caused by hand tremors and blurred metal brush boundaries when relying solely on manual caliper measurements in existing technologies. Simultaneously, it replaces the traditional direct contact of the probe with a mechanical reference, eliminating the problem of deformation and distortion caused by the probe touching the filamentous metal brush, and providing a direct assessment of the fit between the metal brush and the edge of the standard block. Therefore, this invention provides a high-precision physical reference for the inner diameter of the metal brush in the initial measurement stage, significantly improving the measurement accuracy of the metal brush.

Description

Technical Field

[0001] This application relates to the technical field of metal brush auxiliary inspection equipment, and in particular to a brush-type sealing auxiliary inspection fixture. Background Technology

[0002] Brush sealing is a sealing technology that uses metal brushes mounted on the APS5000A aircraft's APU (Auxiliary Power Unit) for sealing. Because it relies on direct metal-to-metal contact for sealing, the metal brushes are highly susceptible to wear. According to the maintenance manual, the diameter of the brushes needs to be measured. However, since the brushes are made of filamentous metal, the measurement boundaries are unclear. When the measuring machine probe touches the brush, it deforms severely, leading to significant data distortion. Furthermore, current technology relies solely on manual measurement, which is insufficient for effective measurement.

[0003] Therefore, how to improve the measurement accuracy of metal brushes is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] This application provides a brush-type sealing auxiliary inspection fixture to improve the measurement accuracy of metal brushes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A brush-type sealing auxiliary inspection fixture includes a base, the table surface of which is provided with at least one measuring position. The measuring position includes a centering groove formed in the table surface. The bottom of the centering groove is provided with a positioning boss arranged coaxially with the centering groove. A centering hole is formed in the middle of the positioning boss. The measuring position also includes an annular step formed coaxially with the centering groove. The annular step is used to place a metal brush. It also includes a standard block, the bottom of which is inserted into the centering hole, and the edge of the standard block is arranged close to the inner diameter of the metal brush.

[0006] Optionally, in the above-mentioned brush-type sealing auxiliary inspection fixture, the standard block has a coaxially arranged insertion part and a measuring part. The measuring part is cylindrical, and the diameter of the measuring part is less than or equal to the diameter of the centering groove. When the insertion part is inserted into the centering hole, the outer wall of the measuring part is arranged close to the inner diameter of the metal brush.

[0007] Optionally, in the above-mentioned brush-type sealing auxiliary inspection fixture, the standard block further includes a gripping part, which is fixed to the side of the measuring part away from the insertion part. When the insertion part is engaged with the positioning boss, the gripping part protrudes from the centering groove.

[0008] Optionally, in the above-mentioned brush-type sealing auxiliary inspection fixture, the standard block includes a connecting seat, a measuring component, a driving component, a rotating rod, and a displacement sensor. The connecting seat includes a mounting part, the top of which has a limiting groove. The bottom of the measuring component has a limiting block for slidingly engaging with the limiting groove. The edge of the measuring component extends vertically and has a measuring wall. The bottom of the connecting seat has a mating part for inserting into the centering hole. When the mating part is inserted into the centering hole, the edge of the measuring wall is arranged close to the inner diameter of the metal brush. The mounting part has a connecting hole that passes through the connecting seat in the middle, the rotating rod passes through the connecting hole, and the output end of the driving member is connected to the rotating rod for driving the rotating rod to rotate. The displacement sensor is disposed on the measuring wall and is used to detect the distance between the measuring wall and the inner diameter of the metal brush.

[0009] Optionally, the above-mentioned brush-type sealing auxiliary inspection fixture also includes a locking component. The side wall of the limiting groove is provided with a threaded hole, and the limiting block is provided with multiple recesses. The locking component is used to pass through the threaded hole and abut against the recesses. After the measuring component slides along the limiting groove to the preset position, rotating the locking component can lock the measuring component to the connecting seat.

[0010] Optionally, in the above-mentioned brush-type sealing auxiliary inspection fixture, the driving component is a drive motor, which is fixedly installed below the platform of the base. The rotating rod passes downward through the centering hole, and the output shaft of the drive motor is fixedly connected to the bottom end of the rotating rod to drive the rotating rod to drive the connecting seat to rotate circumferentially around the axis of the centering hole.

[0011] Optionally, in the above-mentioned brush-type sealing auxiliary inspection fixture, the outer peripheral surface of the connecting seat is provided with scale lines, and the side wall of the measuring component is provided with an indicator part; As the measuring element slides along the limiting groove, the position of the indicator relative to the scale line changes to indicate the current radial extension distance of the measuring wall or the corresponding inner diameter value of the metal brush.

[0012] Optionally, in the above-mentioned brush-type sealing auxiliary inspection fixture, the side of the measuring wall facing the inner diameter of the metal brush is arc-shaped, and a mounting hole is provided on the arc-shaped surface. The displacement sensor is embedded in the mounting hole, and the detection end of the displacement sensor is located inside the mounting hole and is flush with or recessed on the arc-shaped surface. The displacement sensor is a non-contact displacement sensor used to detect the radial distance between the arc-shaped surface and the inner diameter of the metal brush when the measuring wall is in a rotating state.

[0013] Optionally, in the above-mentioned brush-type sealing auxiliary inspection fixture, the number of measuring positions is two, namely an upper limit position and a lower limit position. The standard block includes an upper limit block and a lower limit block. The upper limit block is disposed inside the upper limit position, and the size of the measuring part of the upper limit block matches the upper limit size of the inner diameter of the metal brush. The lower limit block is disposed inside the lower limit position, and the size of the measuring part of the lower limit block matches the lower limit size of the inner diameter of the metal brush.

[0014] Optionally, the above-mentioned brush-type sealing auxiliary inspection fixture also includes a data acquisition and display terminal. The displacement sensor is electrically connected to the data acquisition and display terminal and is used to transmit the real-time distance data between the measuring wall and the inner diameter of the metal brush to the data acquisition and display terminal during the rotation of the measuring wall, and the data acquisition and display terminal generates a circumferential gap change curve.

[0015] The brush-type sealing auxiliary inspection fixture provided by this invention involves placing the metal brush to be tested on an annular step and inserting the bottom of a standard block into a coaxially arranged centering hole. Since the centering hole and centering groove are coaxial, the edge of the standard block, after installation, forms a defined physical reference with the inner diameter of the metal brush and is positioned close to the inner diameter. This insertion and mating structure provides a stable mechanical alignment for measurement, effectively avoiding positioning deviations caused by hand tremors and blurred metal brush boundaries when relying solely on manual caliper measurements in existing technologies. Simultaneously, by using the standard block's edge close to the metal brush's inner diameter, a mechanical reference can replace the traditional direct contact of the probe, eliminating the problem of deformation and distortion caused by the probe touching the filamentous metal brush. This allows for a direct assessment of the fit between the metal brush and the standard block's edge. Therefore, this invention provides a high-precision physical reference for the metal brush's inner diameter at the initial measurement stage, fundamentally eliminating errors caused by human factors and the soft deformation of the metal brush, significantly improving the measurement accuracy of the metal brush. Attached Figure Description

[0016] The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort. One or more embodiments are illustrated by way of example through the corresponding images in the accompanying drawings. These exemplary descriptions do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0017] Figure 1This is a schematic diagram of the structure of the brush-type sealing auxiliary inspection tool provided in the embodiments of this application; Figure 2 A schematic diagram of the structure of one embodiment of the standard block provided in this application; Figure 3 This is a schematic diagram of another embodiment of the standard block provided in this application.

[0018] Explanation of reference numerals in the attached figures: Base 100, centering groove 101, positioning boss 102, annular step 103, metal brush 104, insertion part 200, measuring part 201, gripping part 202, connecting seat 300, limiting groove 301, mating part 302, measuring component 400, limiting block 401, measuring wall 402, rotating rod 500. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0021] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0022] See Figures 1-3 This application provides a brush-type sealing auxiliary inspection fixture, including a base 100. The base 100 has at least one measuring position on its surface. The measuring position includes a centering groove 101 formed on the surface. The bottom of the centering groove 101 is provided with a positioning boss 102 arranged coaxially with the centering groove 101. The centering boss 102 has a centering hole in its center. The measuring position also includes an annular step 103 formed coaxially with the centering groove 101. The annular step 103 is used to place a metal brush 104. It also includes a standard block. The bottom of the standard block is inserted into the centering hole, and the edge of the standard block is arranged close to the inner diameter of the metal brush 104.

[0023] Specifically, the base 100 has four support legs connected to the lower part of the platform to support the base 100; a soft rubber pad can be added to the bottom surface of the annular step 103 to protect the metal brush 104.

[0024] The brush-type sealing auxiliary inspection fixture provided by this invention involves placing the metal brush 104 to be tested on the annular step 103, and inserting the bottom of a standard block into a coaxially arranged centering hole. Since the centering hole and centering groove 101 are coaxial, after installation, the edge of the standard block forms a defined physical reference with the inner diameter of the metal brush 104 and is positioned close to the inner diameter. This insertion and mating structure provides a stable mechanical alignment for measurement, effectively avoiding positioning deviations caused by hand tremors and blurred boundaries of the metal brush 104 when relying solely on manual caliper measurement in existing technologies. Simultaneously, by utilizing the arrangement of the standard block's edge close to the inner diameter of the metal brush 104, a mechanical reference can replace the traditional direct contact of the probe, eliminating the problem of deformation and distortion caused by the probe touching the filamentous metal brush 104. This allows for a direct assessment of the fit between the metal brush 104 and the edge of the standard block. Therefore, the present invention provides a high-precision physical reference for the inner diameter of the metal brush 104 at the initial stage of measurement, fundamentally eliminating errors caused by human factors and the soft deformation of the metal brush 104, and significantly improving the measurement accuracy of the metal brush 104.

[0025] To optimize the above technical solution, the standard block has a coaxially arranged insertion part 200 and a measuring part 201. The measuring part 201 is cylindrical, and the diameter of the measuring part 201 is less than or equal to the diameter of the centering groove 101. When the insertion part 200 is inserted into the centering hole, the outer wall of the measuring part 201 is arranged close to the inner diameter of the metal brush 104.

[0026] Specifically, the insertion part 200 is used for precise alignment of the centering hole, and the cylindrical measuring part 201 is used to provide a standard, smooth, and continuous physical contact surface (or a very close-range reference surface).

[0027] In use, the operator takes out a standard block equipped with a coaxial connector 200 and a measuring part 201. First, the lower connector 200 is fully inserted into the centering hole, and the initial guidance and locking are completed by utilizing the gap between the connector 200 and the centering hole. Then, the standard block is pushed downwards, so that the cylindrical measuring part 201 on top of the standard block enters the centering groove 101 area. Since the outer diameter of the cylindrical measuring part 201 is strictly set to be less than or equal to the diameter of the centering groove 101, its cylindrical outer wall will gradually approach the inner diameter of the metal brush 104 when entering the centering groove 101. After the standard block is in place, the operator can check the gap between the outer wall of the cylindrical measuring part 201 and the inner diameter of the metal brush 104 by visual inspection or by using a translucent method along the circumference. If the gap is a uniform ring shape, it indicates that the inner diameter of the metal brush 104 is regular; if the gap on one side is found to be significantly larger or smaller, it can be determined that the metal brush 104 has uneven deformation or uneven wear. The cylindrical measuring part 201 avoids measurement blind spots caused by local sharp corners or non-standard contours, so that every point on the outer wall of the measuring part 201 can serve as a stable reference point, greatly improving the reliability and repeatability of the reference, and improving both the measurement accuracy and measurement efficiency of the metal brush 104.

[0028] To optimize the above technical solution, the standard block also includes a gripping part 202, which is fixed to the side of the measuring part 201 away from the insertion part 200. When the insertion part 200 is engaged with the positioning boss 102, the gripping part 202 protrudes from the centering groove 101.

[0029] In actual maintenance operations, maintenance personnel often wear gloves or have oil on their hands. The insertion part 200 of the standard block needs to be inserted deep into the centering hole. At this time, the grip part 202 provides a mechanical fulcrum located above. The operator can quickly insert, pull out, and finely adjust the standard block inside the centering hole by pinching or holding the grip part 202 with their fingers. When using it, when the operator needs to insert the standard block, they directly pinch the grip part 202 located on the upper part of the standard block with their fingers. By applying downward pressure through the grip part 202, the standard block is smoothly pushed into the centering hole until it is fully in place. After the standard block is fully engaged, due to the physical height of the grip part 202, its top end will protrude significantly beyond the top surface of the centering groove 101 of the base 100. When it is necessary to remove the standard block, the operator only needs to pinch this protruding grip part 202 and pull it vertically upward to easily remove the standard block from the centering hole. In addition, when fine-tuning the standard block (such as when multi-angle alignment is required), the operator can grasp the grip part 202 protruding from the centering groove 101 to rotate it, ensuring that the palm and other parts do not directly contact the measuring part 201 of the standard block, thereby protecting the accuracy of the measuring part 201 from the influence of human hand sweat, oil or thermal expansion, so as to ensure measurement accuracy.

[0030] To optimize the above technical solution, the standard block includes a connecting seat 300, a measuring element 400, a driving element, a rotating rod 500, and a displacement sensor. The connecting seat 300 includes a mounting part with a limiting groove 301 at the top. The bottom of the measuring element 400 has a limiting block 401 for sliding engagement with the limiting groove 301. The edge of the measuring element 400 extends vertically and has a measuring wall 402. The bottom of the connecting seat 300 has a mating part 302 for insertion into the centering hole. When the mating part 302 is inserted into the centering hole, the edge of the measuring wall 402 is close to the inner diameter of the metal brush 104. A connecting hole penetrating the connecting seat 300 is opened in the middle of the mounting part. The rotating rod 500 passes through the connecting hole. The output end of the driving element is connected to the rotating rod 500 for driving the rotating rod 500 to rotate. The displacement sensor is set on the measuring wall 402 for detecting the distance between the measuring wall 402 and the inner diameter of the metal brush 104.

[0031] The operator first vertically aligns the mating part 302 at the bottom of the connecting seat 300 and inserts it into the centering hole of the base 100 to complete the reference positioning between the connecting seat 300 and the base 100. At this time, the driving component remains connected to the rotating rod 500. It should be noted that in this scheme, the rotating rod 500 is dedicated to driving the connecting seat 300 to perform circumferential scanning and does not participate in the radial movement adjustment of the measuring component 400. The radial sliding of the measuring component 400 within the limiting groove 301 is accomplished by a mechanical adjustment mechanism independent of the rotating rod 500 (for example, the operator directly pushes and pulls the measuring component 400 manually, or drives the eccentric wheel to slide through a fine-tuning knob separately provided on the connecting seat 300).

[0032] Once the measuring element 400 is adjusted to a preset position close to the inner diameter of the metal brush 104, the drive unit outputs power to rotate the rotating rod 500. The rotating rod 500 is only responsible for driving the entire connecting seat 300 to rotate circumferentially around the axis of the center hole. As the connecting seat 300 rotates at a uniform speed, the measuring wall 402, which is installed on the edge of the measuring element 400 and extends vertically, and the displacement sensor installed on the measuring wall 402, together perform a 360-degree full-circumference scan of the inner diameter of the metal brush 104. During this process, the displacement sensor collects the physical distance between the measuring wall 402 and the inner diameter of the metal brush 104 in real time and feeds the data back to the subsequent processing system, improving the measurement accuracy of the metal brush 104.

[0033] To optimize the above technical solution, the brush-type sealing auxiliary inspection fixture also includes a locking component. The side wall of the limiting groove 301 is provided with a threaded hole, and the limiting block 401 is provided with multiple recesses. The locking component is used to pass through the threaded hole and abut against the recesses. When the measuring component 400 slides along the limiting groove 301 to the preset position, rotating the locking component can lock the measuring component 400 to the connecting seat 300.

[0034] A threaded hole is made in the wall of the limiting groove 301, and multiple recesses are made at intervals on the limiting block 401. After the locking member passes through the threaded hole, its front end can be precisely embedded in the recess on the limiting block 401. Pick up the locking member (such as a screw with a knob) and screw it into the threaded hole on the side wall of the limiting groove 301. Continue to rotate the locking member so that its front end goes deeper until it passes through the threaded hole and abuts against the wall of the recess. As the front end of the locking member is fully embedded in the recess, the limiting block 401 of the measuring member 400 is physically and rigidly locked in the limiting groove 301. At this time, even if there is a large centrifugal force or gravity, the measuring member 400 cannot produce any radial displacement or sliding in the limiting groove 301, thus ensuring the stability of the locking state. After completing the full circumference scan, loosen the locking member in the opposite direction to remove it from the recess and release the measuring member 400.

[0035] This arrangement ensures that during subsequent 360-degree high-speed circumferential rotation scanning, the measuring wall 402 will not retract or shift radially due to high-speed centrifugal force or gravity, thus guaranteeing the absolute reliability of the scanning data.

[0036] In this scheme, the sliding of the measuring component 400 within the limiting groove 301 is achieved entirely by the maintenance personnel pushing and pulling it directly with their fingers. The operation procedure is as follows: the maintenance personnel manually push the measuring component 400 along the limiting groove 301 until the measuring wall 402 approaches the preset safe position of the inner diameter of the metal brush 104. At this point, the locking component is tightened directly to rigidly lock the measuring component 400 within the limiting groove 301. Subsequently, the operator activates the drive component, which drives the entire locking connecting seat 300 to rotate circumferentially via the rotating rod 500, completing a full circumferential scan. The displacement sensor also automatically collects data during the rotation of the measuring wall 402.

[0037] As an automated alternative to the aforementioned manual solution, the radial sliding of the measuring element 400 can also be achieved by adding an independent electric drive mechanism. Specifically, a micro motor (controllable for forward and reverse rotation) is fixedly installed in the mounting portion of the connecting seat 300. The output shaft of this micro motor is connected to a bidirectional lead screw or gear rack mechanism, and the two measuring elements 400 are respectively engaged with the bidirectional lead screw to drive the measuring elements 400 to slide automatically along the limiting groove 301. When the micro motor rotates forward, it drives the two measuring elements 400 to move outward synchronously along the limiting groove 301; when the micro motor rotates in reverse, it drives the two measuring elements 400 to move inward. The operator only needs to input the target inner diameter value through the control panel, and the micro motor can automatically drive the measuring wall 402 to a safe reference position. Subsequently, the operator also manually locks and fixes the measuring element 400, and then activates the drive mechanism to drive the connecting seat 300 to scan circumferentially. This embodiment achieves fully automatic centering of the measuring element 400, significantly reducing the intensity of manual operation.

[0038] To optimize the above technical solution, the driving component is a drive motor, which is fixedly installed below the platform of the base 100. The rotating rod 500 passes downward through the centering hole, and the output shaft of the drive motor is fixedly connected to the bottom end of the rotating rod 500, so as to drive the rotating rod 500 to drive the connecting seat 300 to rotate circumferentially around the axis of the centering hole.

[0039] After the measuring element 400 is fixed to the preset radial position by the locking device, the operator activates the automatic rotation scanning mode. At this time, the drive motor, which is fixedly installed under the table surface of the base 100, receives the start command and begins to run. The output shaft of the drive motor rotates, and since the output shaft is fixedly connected to the bottom end of the rotating rod 500 passing through the centering hole, the rotational force of the motor is directly transmitted to the rotating rod 500. The rotating rod 500 generates a circumferential torsional force, driving the connecting seat 300, which is fitted with it, to rotate circumferentially around its own central axis within the centering hole. When the connecting seat 300 rotates, the measuring element 400 and the measuring wall 402 with displacement sensor mounted on it also perform a unified circumferential motion. The drive motor continuously drives the connecting seat 300 to rotate (usually set to at least one complete rotation, i.e., more than 360 degrees), causing the measuring wall 402 to perform uninterrupted automatic full-circumferential scanning along the inner diameter of the metal brush 104. In this solution, the cooperation between the drive unit and the rotating rod 500 avoids the uneven force caused by manually pushing and pulling the measuring arm, and the introduction of the displacement sensor realizes the quantification and automation of measurement data.

[0040] The preferred number of limiting grooves 301 in this application is two, and correspondingly, the number of limiting blocks 401 is two. The two limiting grooves 301 are arranged in a straight line relative to each other. At this time, the tooling has two displacement sensors, and the detection of a metal brush 104 can be completed by rotating the connecting seat 300 180 degrees.

[0041] To optimize the above technical solution, the outer peripheral surface of the connecting seat 300 is provided with scale lines, and the side wall of the measuring component 400 is provided with an indicator; when the measuring component 400 slides along the limiting groove 301, the position of the indicator relative to the scale lines changes, so as to indicate the current radial extension distance of the measuring wall 402 or the corresponding inner diameter value of the metal brush 104.

[0042] When the operator manually (or via a micro-motor) moves the measuring element 400, the indicator mounted on the side wall of the measuring element 400 moves synchronously. During adjustment, the operator needs to observe in real time the position of the indicator on the scale line on the outer circumference of the connecting seat 300. As the indicator moves, the scale value it points to is updated in real time. Through these scale values, the operator can intuitively read the actual radial extension distance of the measuring wall 402 from the central axis of the connecting seat 300. Alternatively, the operator can directly determine the specific value of the inner diameter of the metal brush 104 corresponding to the current measuring wall 402 by referring to the lookup table or calculation formula pre-printed next to the scale line. Based on this value, the operator can precisely adjust the measuring wall 402 to the target inner diameter reference point specified in the maintenance manual, avoiding blind adjustment. This facilitates the operator in setting a preset safety distance or reference positioning before measurement, further improving measurement efficiency.

[0043] To optimize the above technical solution, the side of the measuring wall 402 facing the inner diameter of the metal brush 104 is arc-shaped, and a mounting hole is provided on the arc-shaped surface. The displacement sensor is embedded in the mounting hole, and the detection end of the displacement sensor is located inside the mounting hole and is flush with or recessed on the arc-shaped surface. The displacement sensor is a non-contact displacement sensor, which is used to detect the radial distance between the arc-shaped surface and the inner diameter of the metal brush 104 when the measuring wall 402 is in a rotating state.

[0044] When the measuring wall 402 is pushed close to the inner diameter of the metal brush 104, the arc-shaped surface of the measuring wall 402 facing the inner diameter of the metal brush 104 first approaches the inner wall of the metal brush 104. Since the curvature of this arc-shaped surface matches the curvature of the inner diameter of the metal brush 104, the two are in a nearly parallel fit. The non-contact displacement sensor embedded in the mounting hole of the arc-shaped surface starts working. Because the sensing end of the displacement sensor is designed to be flush with or recessed from the arc-shaped surface, it neither protrudes from the arc-shaped surface during operation nor makes any physical contact with the bristles of the metal brush 104. During the subsequent full-circumference rotation scan, the displacement sensor continuously probes the radial distance between the arc-shaped surface and the inner diameter of the metal brush 104 through the mounting hole without contact, thus ensuring that the displacement sensor is not scratched or damaged by the soft bristles of the metal brush 104 during the scan, and that the metal brush 104 is not deformed due to the rebound force of the physical probe, thereby ensuring the purity of the measurement data.

[0045] Furthermore, the curved surface of the measuring wall 402 can be detachably connected to the measuring wall 402. For different APU models or different design sizes of brush seals, maintenance personnel do not need to replace the entire set of connectors 300 and standard blocks. They only need to snap and plug to replace the curved surface, thereby reducing tooling manufacturing costs.

[0046] To optimize the above technical solution, there are two measurement positions, namely an upper limit position and a lower limit position. The standard block includes an upper limit block and a lower limit block. The upper limit block is set inside the upper limit position. The size of the measuring part 201 of the upper limit block matches the upper limit size of the inner diameter of the metal brush 104. The lower limit block is set inside the lower limit position. The size of the measuring part 201 of the lower limit block matches the lower limit size of the inner diameter of the metal brush 104.

[0047] Specifically, the base 100 is equipped with two measuring positions. The upper limit position is used to detect whether the inner diameter of the metal brush 104 is the minimum inner diameter of the standard part. If it is, the metal brush 104 is not worn and is a normal workpiece. If not, the metal brush 104 is worn. In this case, the upper limit position can also be used to detect the difference between the inner diameter of the metal brush 104 and the standard part to help determine the degree of wear. When the wear degree of the metal brush 104 exceeds the preset value, the operator can use the lower limit position for judgment. The size of the measuring part 201 of the lower limit position can be the maximum inner diameter of the metal brush 104. That is, when the inner diameter of the metal brush 104 is the same as the size of the measuring part 201 of the lower limit position, it can be determined that the metal brush 104 is severely worn. In other words, when checking the inner diameter tolerance of the brush seal, the operator needs to use the upper and lower limit measuring positions for cross-verification to quickly complete the verification.

[0048] To optimize the above technical solution, the brush-type sealing auxiliary inspection fixture also includes a data acquisition and display terminal. The displacement sensor is electrically connected to the data acquisition and display terminal and is used to transmit the real-time distance data between the inner diameter of the measuring wall 402 and the metal brush 104 to the data acquisition and display terminal during the rotation of the measuring wall 402. The data acquisition and display terminal then generates a circumferential gap change curve.

[0049] During the full-circumference rotation scanning process of the connecting seat 300 driven by the drive component, a non-contact displacement sensor installed on the measuring wall 402 continuously detects the real-time distance data between the measuring wall 402 and the inner diameter of the metal brush 104 at an extremely high sampling frequency. These dense data points are collected and transmitted in real-time to an external data acquisition and display terminal via cable or wireless transmission. Upon receiving the massive amount of distance data, the data acquisition terminal, combined with the rotation angle information of the connecting seat 300, continuously stitches these discrete data points together according to angle in the data processing unit, generating a continuous circumferential gap change curve on the screen in real time. When the operator observes the curve, if a significant downward trough (i.e., a sudden increase in gap) is observed at certain specific angles, a clear and precise location can be made of an uneven wear area on the circumference of the metal brush 104, thus guiding subsequent maintenance or replacement decisions. The data acquisition terminal can also be directly connected to an industrial printer to output a paper curve report on-site for maintenance record keeping.

[0050] It should be noted that the brush-type sealing auxiliary inspection fixture provided by this invention can be used in the field of metal brush auxiliary inspection equipment technology or other fields. Other fields refer to any field other than the field of metal brush auxiliary inspection equipment technology. The above is merely an example and does not limit the application field of the brush-type sealing auxiliary inspection fixture provided by this invention.

[0051] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0052] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0053] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A brush-type sealing auxiliary inspection fixture, characterized in that, The device includes a base, and the platform of the base has at least one measuring position. The measuring position includes a centering groove formed on the platform. The bottom of the centering groove is provided with a positioning boss arranged coaxially with the centering groove. The centering boss has a centering hole in the middle. The measuring position also includes an annular step formed coaxially with the centering groove. The annular step is used to place a metal brush. It also includes a standard block, the bottom of which is inserted into the centering hole, and the edge of the standard block is arranged close to the inner diameter of the metal brush; The standard block has a coaxially arranged insertion part and a measuring part. The measuring part is cylindrical and its diameter is less than or equal to the diameter of the centering groove. When the insertion part is inserted into the centering hole, the outer wall of the measuring part is arranged close to the inner diameter of the metal brush.

2. The brush-type sealing auxiliary inspection fixture according to claim 1, characterized in that, The standard block also includes a gripping part, which is fixed to the side of the measuring part away from the plug-in part. When the plug-in part is engaged with the positioning boss, the gripping part protrudes from the centering groove.

3. The brush-type sealing auxiliary inspection fixture according to claim 1, characterized in that, The standard block includes a connecting seat, a measuring component, a driving component, a rotating rod, and a displacement sensor. The connecting seat includes a mounting part with a limiting groove at the top. The bottom of the measuring component has a limiting block for slidingly engaging with the limiting groove. The edge of the measuring component extends vertically and has a measuring wall. The bottom of the connecting seat has a mating part for inserting into the centering hole. When the mating part is inserted into the centering hole, the edge of the measuring wall is arranged close to the inner diameter of the metal brush. The mounting part has a connecting hole that passes through the connecting seat in the middle, the rotating rod passes through the connecting hole, and the output end of the driving member is connected to the rotating rod for driving the rotating rod to rotate. The displacement sensor is disposed on the measuring wall and is used to detect the distance between the measuring wall and the inner diameter of the metal brush.

4. The brush-type sealing auxiliary inspection fixture according to claim 3, characterized in that, It also includes a locking component, wherein a threaded hole is provided on the side wall of the limiting groove, and a plurality of recesses are provided on the limiting block, and the locking component is used to pass through the threaded hole and abut against the recesses; After the measuring component slides along the limiting groove to the preset position, rotating the locking component can lock the measuring component to the connecting seat.

5. The brush-type sealing auxiliary inspection fixture according to claim 3, characterized in that, The driving component is a drive motor, which is fixedly installed below the platform of the base. The rotating rod passes downward through the centering hole, and the output shaft of the drive motor is fixedly connected to the bottom end of the rotating rod to drive the rotating rod to drive the connecting seat to rotate circumferentially around the axis of the centering hole.

6. The brush-type sealing auxiliary inspection fixture according to claim 3, characterized in that, The outer circumferential surface of the connector is provided with scale lines, and the side wall of the measuring component is provided with an indicator. As the measuring element slides along the limiting groove, the position of the indicator relative to the scale line changes to indicate the current radial extension distance of the measuring wall or the corresponding inner diameter value of the metal brush.

7. The brush-type sealing auxiliary inspection fixture according to claim 3, characterized in that, The measuring wall has an arc-shaped surface on the side facing the inner diameter of the metal brush. A mounting hole is provided on the arc-shaped surface. The displacement sensor is embedded inside the mounting hole, and the detection end of the displacement sensor is located inside the mounting hole and is flush with or recessed on the arc-shaped surface. The displacement sensor is a non-contact displacement sensor used to detect the radial distance between the arc-shaped surface and the inner diameter of the metal brush when the measuring wall is in a rotating state.

8. The brush-type sealing auxiliary inspection fixture according to claim 1, characterized in that, The number of measuring positions is two, namely an upper limit position and a lower limit position. The standard block includes an upper limit block and a lower limit block. The upper limit block is disposed inside the upper limit position, and the size of the measuring part of the upper limit block matches the upper limit size of the inner diameter of the metal brush. The lower limit block is disposed inside the lower limit position, and the size of the measuring part of the lower limit block matches the lower limit size of the inner diameter of the metal brush.

9. The brush-type sealing auxiliary inspection fixture according to claim 3, characterized in that, It also includes a data acquisition and display terminal. The displacement sensor is electrically connected to the data acquisition and display terminal and is used to transmit the real-time distance data between the inner diameter of the measuring wall and the metal brush to the data acquisition and display terminal during the rotation of the measuring wall. The data acquisition and display terminal then generates a circumferential gap change curve.

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