Device and method for measuring the leading edge of a dynamic diffuser blade

Abstract

This application relates to the field of damage inspection technology, and in particular to a device and method for measuring the leading edge of a power diffuser blade. The device includes a mounting platform, a rotating shaft structure, a measuring probe, and a connecting assembly. The rotating shaft structure is rotatably connected to the mounting platform. The first end of the measuring probe is connected to the rotating shaft structure, and the second end extends outward for measurement. The connecting assembly is disposed between the rotating shaft structure and the measuring probe and is used to adjust the extension length of the measuring probe. This device achieves a stable connection with the part to be measured through the mounting platform, providing a reliable reference for measurement. The design of the rotating shaft structure allows the measuring probe to rotate around a fixed point, simulating the arc trajectory of the blade's leading edge, making operation simple and the motion trajectory accurate. The connecting assembly allows for adjustable length of the measuring probe, adapting to the measurement needs of blades of different models or wear levels, improving the versatility and measurement accuracy of the device, greatly increasing work efficiency, and saving time.

Description

Technical Field

[0001] This application relates to the field of damage inspection technology, and in particular to a device and method for measuring the leading edge of a powered diffuser blade. Background Technology

[0002] The power diffuser is a core component of the APS3200 auxiliary power unit, widely used in aircraft such as commercial airliners. Its primary application is downstream of the compressor, guiding and rectifying the high-speed compressed air to ensure a smooth flow into the next stage of components. Due to the harsh operating conditions of high temperature, high pressure, and high-speed airflow, minute particles or high-speed flow fields in the compressed air inevitably cause slight to severe erosion at the leading edge of the diffuser blades. The aerodynamic profile accuracy of the power diffuser directly affects the overall operating efficiency and safety of the auxiliary power unit. Therefore, after the auxiliary power unit undergoes major overhaul and disassembly, the erosion condition of the power diffuser must be rigorously inspected and precisely quantified to assess whether it meets the airworthiness standards for continued use. This is of paramount importance in aircraft maintenance engineering.

[0003] Existing powered diffusers exhibit highly complex three-dimensional spatial features. Their main body consists of a ring-shaped base and multiple guide vanes distributed circumferentially. These guide vanes are not vertically positioned but are obliquely welded to grooves within the base at specific, tricky angles. Additionally, small bosses are designed below and above the guide vanes. Due to this complex physical structure, current methods for detecting wind erosion in powered diffusers primarily rely on traditional mechanical measuring instruments, such as vernier calipers or feeler gauges. The measurement principle typically involves attempting to fit a template tooling surface onto the leading edge of the guide vanes and the side of the bosses, and indirectly estimating and determining the amount of material lost due to wind erosion at the leading edge of the blades by observing the light-transmitting gap between the tooling and the actual blade surface or by directly reading the feeler gauge thickness.

[0004] However, based on the structure and measurement principles of the aforementioned traditional measuring instruments and tooling, significant obstacles have been encountered in actual operation. On the one hand, due to the extremely narrow internal space and tricky blade angles of the power diffuser, traditional measuring instruments cannot easily be inserted and find the correct measurement angle for effective measurement. On the other hand, for the relatively small upper and lower bosses, even with tooling designed to fit snugly against their sides, slight gaps are easily created due to space constraints and interference from the oblique welding structure. In addition, the obstruction of the guide blades severely affects the observer's line of sight, making it impossible to accurately determine the size of the gap. Therefore, limited by the narrow space and complex oblique structure of the power diffuser, traditional measuring instruments cannot achieve precise fit and angle alignment with the measured surface, making it difficult to accurately measure and quantify the blade erosion. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This part of the invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0007] Therefore, a first aspect of the present invention provides a device for measuring the leading edge of a dynamic diffuser blade.

[0008] A second aspect of the present invention provides a method for measuring the leading edge of a dynamic diffuser blade.

[0009] In view of this, a first aspect of the embodiments of this application provides a measuring device for the leading edge of a dynamic diffuser blade, comprising:

[0010] Installation platform;

[0011] A rotating shaft structure is rotatably connected to the mounting platform.

[0012] A measuring needle, the first end of which is connected to the rotating shaft structure, and the second end which extends outward for measurement;

[0013] A connecting component is disposed between the rotating shaft structure and the measuring needle, and is used to adjust the extension length of the measuring needle.

[0014] In one feasible implementation, the installation platform includes:

[0015] A base, wherein mounting holes are provided on the base;

[0016] Fasteners are provided in the mounting holes for connecting the base and the part to be measured.

[0017] In one feasible implementation, the connection component includes:

[0018] A first stop is disposed at the first end of the measuring needle and is detachably connected to the measuring needle, and the first stop is located on one side of the rotating shaft structure.

[0019] In one feasible implementation, the connection component further includes:

[0020] The second stop is connected to the measuring needle, and the second stop and the first stop are respectively located on both sides of the rotating shaft structure;

[0021] A first elastic element is disposed on the measuring needle and located between the second stop and the rotating shaft structure.

[0022] In one feasible implementation, the first stop includes a nut that is threadedly connected to the measuring needle.

[0023] In one feasible implementation, the rotating shaft structure includes:

[0024] A shaft member, which is rotatably connected to the mounting platform;

[0025] A limiting component is connected to the shaft and is used to axially limit the shaft.

[0026] In one feasible implementation, the limiting component includes:

[0027] The third stop is located at the end of the shaft away from the measuring needle, and the third stop is threadedly connected to the shaft.

[0028] A second elastic element is disposed on the shaft and located between the mounting platform and the measuring needle.

[0029] According to a second aspect of this embodiment, a method for measuring the leading edge of a powered diffuser blade is provided, using the powered diffuser blade leading edge measuring device described in any of the above-described technical solutions. The method includes the following steps:

[0030] Fix the mounting platform to the part to be measured;

[0031] Rotate the shaft structure to move the measuring needle to the position of the leading edge of the blade of the workpiece to be measured;

[0032] Determine whether the measuring needle intersects with the leading edge of the blade:

[0033] If they intersect, it is determined that the wind erosion at the leading edge of the blade meets the requirements for continued use;

[0034] If they do not intersect, it is determined that the wind erosion at the leading edge of the blade exceeds the maximum wind erosion, and the blade cannot continue to be used.

[0035] In one feasible implementation, when it is determined that the measuring needle intersects with the leading edge of the blade, a continuous measurement step is further included:

[0036] Adjust the extension length of the measuring needle to retract it;

[0037] Rotate the shaft structure to move the measuring needle past the current blade to the leading edge of the next blade to be measured;

[0038] Adjust the extension length of the measuring needle to return it to its original extension length, and continue to execute the step of determining whether the measuring needle intersects with the leading edge of the blade.

[0039] In one feasible implementation, if the leading edge of the blade is inclined relative to the rotation plane of the rotating shaft structure, a height adjustment step is further included:

[0040] Adjust the height of the rotating shaft structure extending from the mounting platform to change the distance between the measuring needle and the workpiece to be measured.

[0041] Compared with the prior art, the present invention has at least the following beneficial effects:

[0042] The power diffuser blade leading edge measuring device provided in this application includes a mounting platform, a rotating shaft structure, a measuring needle, and a connecting assembly. The rotating shaft structure is rotatably connected to the mounting platform. The first end of the measuring needle is connected to the rotating shaft structure, and the second end extends outward for measurement. The connecting assembly is disposed between the rotating shaft structure and the measuring needle and is used to adjust the extension length of the measuring needle. This device achieves a stable connection with the part to be measured through the mounting platform, providing a reliable reference for measurement. The design of the rotating shaft structure allows the measuring needle to rotate around a fixed point, simulating the arc trajectory of the blade leading edge, making operation simple and the motion trajectory accurate. The connecting assembly allows the length of the measuring needle to be adjustable, adapting to the measurement needs of blades of different models or wear levels, improving the versatility and measurement accuracy of the device, greatly increasing work efficiency, and saving time.

[0043] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0044] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0045] Figure 1 A schematic structural diagram of a power diffuser blade leading edge measuring device according to an embodiment of this application;

[0046] Figure 2 A schematic structural diagram of the bottom structure of a power diffuser blade leading edge measuring device according to an embodiment of this application;

[0047] Figure 3A reference diagram showing the position of a power diffuser blade leading edge measuring device mounted on a power diffuser according to an embodiment of this application;

[0048] Figure 4 A schematic flowchart illustrating a method for measuring the leading edge of a power diffuser blade according to an embodiment of this application.

[0049] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0050] 100 mounting platform, 200 rotating shaft structure, 300 measuring probes, 400 connecting components;

[0051] 101 Base, 102 Fastener, 201 Shaft, 202 Third Stop, 203 Second Elastic Member, 401 First Stop, 402 Second Stop, 403 First Elastic Member. Detailed Implementation

[0052] The following description provides numerous specific details to offer a more thorough understanding of the technical solutions provided by this invention. However, it will be apparent to those skilled in the art that the technical solutions provided by this invention can be implemented without one or more of these details.

[0053] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated feature, integral, step, operation, part, and / or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or combinations thereof.

[0054] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0055] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0056] like Figures 1 to 3 As shown in the embodiment of this application, a measuring device for the leading edge of a power diffuser blade is proposed, including a mounting platform 100, a rotating shaft structure 200, a measuring needle 300, and a connecting assembly 400. The rotating shaft structure 200 is rotatably connected to the mounting platform 100. The first end of the measuring needle 300 is connected to the rotating shaft structure 200, and the second end extends outward for measurement. The connecting assembly 400 is disposed between the rotating shaft structure 200 and the measuring needle 300 for adjusting the extension length of the measuring needle 300.

[0057] In this technical solution, the mounting platform 100 can be designed as a circular flange structure, and its material can be aluminum alloy or stainless steel to balance strength and weight; the rotating shaft structure 200 can be connected to the mounting platform 100 using a deep groove ball bearing, or it can be connected by a bushing fit to achieve a rotating connection; the measuring needle 300 can be a high-strength stainless steel needle, or it can be a carbide needle, and its end can be designed as a pointed tip to facilitate alignment with the measuring point; the connecting component 400 can adopt a threaded locking structure or an elastic snap-fit ​​structure. In actual operation, the mounting platform 100 is fixed on the workpiece to be measured as a measurement reference. The rotating shaft structure 200 drives the measuring needle 300 to swing, simulating the theoretical trajectory of the blade leading edge. The connecting component 400 adjusts the extension length of the measuring needle 300 according to the actual wear condition of the blade or the design tolerance, so that it can accurately contact the blade leading edge.

[0058] Understandably, the device achieves a stable connection with the part to be measured through the mounting platform 100, providing a reliable reference for measurement. The design of the rotating shaft structure 200 allows the measuring needle 300 to rotate around a fixed point, simulating the arc trajectory of the blade's leading edge, making operation simple and the motion trajectory accurate. The connection component 400 allows the length of the measuring needle 300 to be adjustable, adapting to the measurement needs of blades of different models or wear levels, improving the device's versatility and measurement accuracy. The device in this application embodiment specifies the APS3200 type auxiliary power unit power diffuser blade leading edge measurement device, method, and operating technology, accurately measuring blade wind erosion, greatly improving work efficiency and saving time.

[0059] like Figure 1 and Figure 3 As shown, in one feasible embodiment, the mounting platform 100 includes a base 101 and a fastener 102. The base 101 is provided with mounting holes, and the fastener 102 is disposed in the mounting holes for connecting the base 101 and the part to be measured.

[0060] In this technical solution, the base 101 has mounting holes on its edges and a central positioning hole in the middle for positioning with the central axis of the workpiece to be measured. The fastener 102 can be a locating pin for fixing the measuring platform base 101 and the power diffuser; alternatively, it can have multiple threaded holes distributed circumferentially as mounting holes. The fastener 102 can also be a hex bolt, socket head cap screw, or quick clamp, fixing the base 101 to the end face or flange of the workpiece to be measured via threaded or snap-fit ​​connections. During installation, the base 101 is placed on the power diffuser and secured together with the locating pin, ensuring no relative displacement between the base 101 and the workpiece to be measured.

[0061] Understandably, the rigid connection between the measuring device and the part to be measured is achieved through the mounting holes on the base 101 and the fasteners 102, ensuring the stability of the reference during the measurement process; it can effectively reduce the measurement error caused by installation eccentricity, ensure the accuracy of the measurement results, and thus accurately measure and salvage some power diffusers that can continue to be used, reducing maintenance costs.

[0062] like Figure 1 As shown, in one feasible embodiment, the connecting assembly 400 includes a first stop 401, which is disposed at the first end of the measuring needle 300 and detachably connected to the measuring needle 300, and the first stop 401 is located on one side of the rotating shaft structure 200.

[0063] In this technical solution, the first stop 401 can specifically be a fixing nut; the measuring needle 300 is inserted into the rotating shaft and fixed on one side by the nut; the first stop 401 can be a sleeve with an internal thread at one end, which is screwed onto the end of the measuring needle 300, or it can be a clamp with an open slot, which is locked onto the measuring needle 300 by screws. In use, the first stop 401 is installed at the designated position of the measuring needle 300 to limit the axial movement range of the measuring needle 300 relative to the rotating shaft structure 200.

[0064] Understandably, the detachable connection of the first stop 401 facilitates the replacement and position adjustment of the measuring needle 300, and allows for the quick replacement of measuring needles 300 of different specifications according to different measurement needs, thereby improving the maintenance convenience and applicability of the device.

[0065] like Figure 1 As shown, in one feasible embodiment, the connecting assembly 400 further includes a second stop 402 and a first elastic member 403. The second stop 402 is connected to the measuring needle 300, and the second stop 402 and the first stop 401 are respectively located on both sides of the rotating shaft structure 200. The first elastic member 403 is disposed on the measuring needle 300 and is located between the second stop 402 and the rotating shaft structure 200.

[0066] In this technical solution, both the first elastic element 403 and the second elastic element 203 can be compression springs, serving as supports and rebound mechanisms. The second stop 402 can be a shoulder, snap ring, or lock nut fixedly mounted on the measuring needle 300. The first stop 401 and the second stop 402 are located on both sides of the rotating shaft structure 200, forming a clamping structure. The first elastic element 403 is compressed between the second stop 402 and the rotating shaft structure 200, constantly applying axial thrust or tension to the measuring needle 300. When it is necessary to retract the measuring needle 300, the elastic force of the first elastic element 403 is overcome to push the measuring needle 300, causing it to temporarily retract. After being released, it automatically resets under the action of the elastic force.

[0067] Understandably, the cooperation of the first stop 401, the second stop 402 and the first elastic member 403 achieves the elastic floating connection of the measuring needle 300, which not only ensures the positional stability of the measuring needle 300 under normal measurement conditions, but also allows the measuring needle 300 to automatically retract and avoid interference, thus avoiding damage to the device or scratches on the blades caused by hard collisions. At the same time, it facilitates quick reset for continuous measurement, greatly improving work efficiency.

[0068] In one possible implementation, the first stop 401 includes a nut that is threadedly connected to the measuring needle 300.

[0069] In this technical solution, the nut can be a hexagonal nut, a round nut, or a wing nut, and the measuring needle 300 has corresponding external threads. A single nut can be used, or a double-nut locking method can be employed to prevent loosening. When adjusting the extension length of the measuring needle 300, the nut is rotated to move it along the axial direction of the measuring needle 300, changing the position of the first stop 401 relative to the rotating shaft structure 200, thereby changing the effective working length of the measuring needle 300.

[0070] Understandably, the threaded connection method has a simple structure, high adjustment accuracy, and can achieve fine adjustment of the 300mm extension length of the measuring needle, meeting the needs of high-precision measurement; at the same time, the nut is easy to disassemble and assemble, has low cost, and is convenient for industrial production and widespread application.

[0071] like Figure 1 and Figure 2 As shown, in one feasible embodiment, the rotating shaft structure 200 includes a shaft 201 and a limiting component. The shaft 201 is rotatably connected to the mounting platform 100, and the limiting component is connected to the shaft 201 to limit the shaft 201 axially.

[0072] In this technical solution, the shaft 201 is specifically a rotating shaft that can rotate the measuring component 360° to fix the measuring needle 300. The limiting component can be a snap ring, shaft end retaining ring, or locking nut installed on the shaft 201 to limit the axial movement of the shaft 201 relative to the mounting platform 100. During measurement, the shaft 201 rotates within the mounting platform 100, causing the measuring needle 300 to swing. The limiting component ensures that the shaft 201 does not move up and down, guaranteeing the stability of the rotation center.

[0073] Understandably, the setting of the limiting component effectively eliminates the axial clearance of the shaft 201 during rotation, ensures the stability of the rotation center of the measuring needle 300, avoids measurement errors caused by axial movement, and improves the repeatability of the measurement.

[0074] like Figure 1 and Figure 2 As shown, in one feasible embodiment, the limiting component includes a third stop 202 and a second elastic member 203. The third stop 202 is disposed at the end of the shaft 201 away from the measuring needle 300 and is threadedly connected to the shaft 201. The second elastic member 203 is disposed on the shaft 201 and is located between the mounting platform 100 and the measuring needle 300.

[0075] In this technical solution, the third stop 202 can be a round nut or an adjusting knob, located at the bottom end of the shaft 201; the second elastic element 203 can be a compression spring, fitted onto the shaft 201, with one end abutting against the mounting platform 100 and the other end abutting against the measuring needle 300 or other components of the rotating shaft structure 200. By rotating the third stop 202, the extension height of the shaft 201 relative to the mounting platform 100 can be adjusted, thereby changing the rotation center height of the measuring needle 300. At this time, the second elastic element 203 plays a supporting and buffering role, maintaining the stability of the height position.

[0076] Understandably, the cooperation of the third stop 202 and the second elastic element 203 enables the elastic adjustment of the height of the rotating shaft structure 200, which can adapt to the measurement needs of the leading edge of the blade at different heights. In particular, for cases where the wind erosion at the leading edge of the blade is different at different vertical positions, the measurement height can be flexibly adjusted, expanding the applicability of the device. At the same time, the elastic support reduces the impact of vibration on the measurement.

[0077] like Figure 4 As shown, according to an embodiment of this application, a method for measuring the leading edge of a powered diffuser blade is proposed, using the powered diffuser blade leading edge measuring device in any of the above embodiments. The method includes:

[0078] Step 501: Fix the mounting platform 100 to the part to be measured;

[0079] Step 502: Rotate the shaft structure 200 to move the measuring needle 300 to the position of the leading edge of the blade of the workpiece to be measured;

[0080] Step 503: Determine whether the measuring needle 300 intersects with the leading edge of the blade:

[0081] If they intersect, it is determined that the wind erosion at the leading edge of the blade meets the requirements for continued use;

[0082] If they do not intersect, it is determined that the wind erosion at the leading edge of the blade exceeds the maximum wind erosion, and the blade cannot continue to be used.

[0083] In practical operation, the measuring needle 300 and the rotating shaft structure 200 rotate synchronously to rotate the measuring needle 300 to the position corresponding to the leading edge of the blade with the measuring component. This confirms whether the measuring needle 300 intersects with the leading edge of the power diffuser blade. If they intersect, it indicates that the wind erosion at the leading edge of the power diffuser meets the requirements for continued use; if they do not intersect, it indicates that the wind erosion at the leading edge of the power diffuser exceeds the maximum wind erosion, and the component cannot continue to be used. The mounting platform 100 can be fixed by bolts or magnetic adsorption. The rotating shaft structure 200 can be rotated manually or by a motor. Whether the measuring needle 300 intersects with the leading edge of the blade can be determined by visual observation or by setting a contact sensor or proximity switch for automatic detection. Specifically, using the theoretical contour line of the blade leading edge as a reference, the rotation radius of the measuring needle 300 corresponds to the minimum allowable remaining thickness of the blade. When the rotation trajectory of the measuring needle 300 is blocked by the blade (i.e., intersecting), it indicates that the remaining thickness of the blade is greater than the minimum value; otherwise, it indicates that the wear exceeds the limit.

[0084] Understandably, this measurement method utilizes the geometric principles of relative motion to transform complex blade profile detection into simple position interference judgment. It is simple and intuitive to operate, and can quickly draw conclusions without complex computing equipment. This method can effectively screen out blades with excessive wind erosion and prevent the use of some slightly excessive power diffusers after accurate measurement, reducing the risk of performance degradation or failure after installation. At the same time, it can also save some power diffusers that can continue to be used, reducing maintenance costs.

[0085] In one feasible implementation, when it is determined that the measuring needle 300 intersects with the leading edge of the blade, the method further includes a continuous measurement step: adjusting the extension length of the measuring needle 300 to retract the measuring needle 300; rotating the rotating shaft structure 200 to move the measuring needle 300 past the current blade to the leading edge of the next blade to be measured; adjusting the extension length of the measuring needle 300 to reset the measuring needle 300 to its original extension length, and continuing to execute the step of determining whether the measuring needle intersects with the leading edge of the blade.

[0086] In this technical solution, when the measuring needle 300 intersects with the leading edge of the blade, it pushes the measuring needle 300 to compress the spring along the nut direction, rotating the measuring needle 300 to the next blade. The spring's rebound force returns the measuring needle 300 to its original length to continue measuring the next blade. Adjusting the extension length of the measuring needle 300 can be achieved by pulling the measuring needle 300 to compress the spring or by rotating the adjustment knob. After the measuring needle 300 retracts, the rotating shaft structure 200 avoids the blade obstruction, enters the measurement area of ​​the next blade, and then extends again. This process can be performed manually sequentially or automatically and continuously using a cam mechanism or an automatic control program.

[0087] Understandably, the design of this continuous measurement step allows the device to inspect all blades one by one without disassembly, greatly improving work efficiency and saving time. By using a shrinking and avoidance method, the problem of limited movement of the measuring needle 300 in a multi-blade structure is solved, ensuring the continuity and integrity of the measurement.

[0088] In one feasible implementation, if the leading edge of the blade is tilted relative to the rotation plane of the rotating shaft structure, a height adjustment step is further included: adjusting the height of the rotating shaft structure 200 extending out of the mounting platform 100 to change the distance between the measuring needle 300 and the workpiece to be measured.

[0089] In this technical solution, if the erosion at the leading edge of the blade is not at the same vertical position, the height of the measuring needle 300 can be adjusted by pressing down the rotating shaft to compress the spring to an appropriate height and fixing it with a nut or loosening the nut, and then continuing the measurement. Height adjustment can be achieved by rotating the adjusting nut at the end of the shaft 201 to compress or release the second elastic element 203, or by adding or removing shims between the mounting platform 100 and the rotating shaft structure 200. Based on the erosion differences at different blade heights, the height of the measuring needle 300 is adjusted, and measurements are taken at different leading edges to obtain the overall erosion distribution of the blade.

[0090] Understandably, this height adjustment step enables differentiated detection of different height positions of the blade leading edge, avoiding misjudgments caused by measuring only a single position, improving the comprehensiveness and accuracy of the measurement, and ensuring accurate assessment of the state of the power diffuser blades.

[0091] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0092] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0093] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0094] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. 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.

Claims

1. A device for measuring the leading edge of a dynamic diffuser blade, characterized in that, include: Installation platform; A rotating shaft structure is rotatably connected to the mounting platform. A measuring needle, the first end of which is connected to the rotating shaft structure, and the second end which extends outward for measurement; A connecting component is disposed between the rotating shaft structure and the measuring needle, and is used to adjust the extension length of the measuring needle; The connection component includes: The first stop is disposed at the first end of the measuring needle and is detachably connected to the measuring needle, and the first stop is located on one side of the rotating shaft structure. The second stop is connected to the measuring needle, and the second stop and the first stop are respectively located on both sides of the rotating shaft structure; A first elastic element is disposed on the measuring needle and located between the second stop and the rotating shaft structure.

2. The dynamic diffuser blade leading edge measuring device according to claim 1, characterized in that, The installation platform includes: A base, wherein mounting holes are provided on the base; Fasteners are provided in the mounting holes for connecting the base and the part to be measured.

3. The dynamic diffuser blade leading edge measuring device according to claim 1, characterized in that, The first stop includes a nut, which is threadedly connected to the measuring needle.

4. The dynamic diffuser blade leading edge measuring device according to claim 1, characterized in that, The rotating shaft structure includes: A shaft member, which is rotatably connected to the mounting platform; A limiting component is connected to the shaft and is used to axially limit the shaft.

5. The dynamic diffuser blade leading edge measuring device according to claim 4, characterized in that, The limiting component includes: The third stop is located at the end of the shaft away from the measuring needle, and the third stop is threadedly connected to the shaft. A second elastic element is disposed on the shaft and located between the mounting platform and the measuring needle.

6. A method for measuring the leading edge of a dynamic diffuser blade, characterized in that, The method, using the power diffuser blade leading edge measuring device as described in any one of claims 1 to 5, comprises: Fix the mounting platform to the part to be measured; Rotate the shaft structure to move the measuring needle to the position of the leading edge of the blade of the workpiece to be measured; Determine whether the measuring needle intersects with the leading edge of the blade: If they intersect, it is determined that the wind erosion at the leading edge of the blade meets the requirements for continued use; If they do not intersect, it is determined that the wind erosion at the leading edge of the blade exceeds the maximum wind erosion, and the blade cannot continue to be used.

7. The method for measuring the leading edge of a dynamic diffuser blade according to claim 6, characterized in that, When it is determined that the measuring needle intersects with the leading edge of the blade, the method further includes a continuous measurement step: Adjust the extension length of the measuring needle to retract it; Rotate the shaft structure to move the measuring needle past the current blade to the leading edge of the next blade to be measured; Adjust the extension length of the measuring needle to return it to its original extension length, and continue to execute the step of determining whether the measuring needle intersects with the leading edge of the blade.

8. The method for measuring the leading edge of a dynamic diffuser blade according to claim 6, characterized in that, If the leading edge of the blade is tilted relative to the rotation plane of the shaft structure, a height adjustment step is also included: Adjust the height of the rotating shaft structure extending from the mounting platform to change the distance between the measuring needle and the part to be measured.

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