Combined eccentricity measurement method and system based on simulation axis

Abstract

The invention provides a combined eccentricity measurement method and system based on a simulation axis. The measurement method comprises the steps that the simulation axis of a core engine is obtained according to jumping measurement points of a front shaft reference and a rear shaft reference of the core engine; determining a reference axis as a function of the support of the high-pressure compressor rotor or the support of the high-pressure turbine rotor; and obtaining an eccentric vector of the to-be-measured disc center relative to the reference axis, and converting to the simulation axis to obtain a target eccentric vector of the to-be-measured disc center. According to the combined eccentricity measurement method based on the simulation axis, when the bounce measurement point of the disc center to be measured is detected, the bounce measurement points at the front shaft reference and the rear shaft reference are detected at the same time, and the simulation axis is obtained through the bounce measurement points at the front shaft reference and the rear shaft reference; and then the eccentric vector determined by the disc center relative support to be detected is converted to the simulation axis to finally obtain the target eccentric vector, so that the system error caused by the detection of the traditional method is effectively inhibited, the excessive dependence on the manufacturing precision of the rotary table is not needed, and the machining difficulty is reduced.

Description

Technical Field

[0001] This invention relates to the field of engine assembly technology, and specifically to a combined eccentricity measurement method and system based on simulated axes. Background Technology

[0002] As a core component of aero engines, the core engine assembly involves numerous procedures and process parameters, which have a decisive impact on the overall assembly quality and efficiency.

[0003] Among them, the disc center runout at the high-pressure rotor joint surface reflects the assembly state of the high-pressure rotor. The eccentric vector formed by its runout directly affects the stability of the rotor structure and the magnitude of the overall vibration, and is the most important process parameter in the core machine assembly.

[0004] In traditional methods, various complex specialized tooling and equipment are required to ensure the accuracy of disc center runout measurement. Most mainstream domestic and international models employ a fixed assembly measurement platform based on a high-precision air-bearing turntable. However, this method suffers from problems such as complex equipment, high cost, poor layout flexibility, cumbersome operation, and difficulty in eliminating errors. Its detection accuracy depends on the air-bearing rotation accuracy of the fixed assembly table, making high-precision manufacturing technology a bottleneck in research and production for this detection position.

[0005] Based on this, the inventors of this application propose a combined eccentricity measurement method and system based on simulated axes in order to solve the above-mentioned technical problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of large systematic errors, excessive reliance on the manufacturing precision of the turntable and high cost in the prior art, and to provide a combined eccentricity measurement method and system based on simulated axes.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution:

[0008] This invention provides a combined eccentricity measurement method based on simulated axes, characterized by comprising:

[0009] Step 1: Obtain the simulated axis of the core machine based on the runout measurement points of the front and rear shaft references of the core machine; wherein, the front shaft reference is the first journal reference of the high-pressure compressor rotor, and the rear shaft reference is the second journal reference of the high-pressure turbine rotor;

[0010] Step 2: Determine the reference axis based on the support of the high-pressure compressor rotor or the support of the high-pressure turbine rotor;

[0011] Step 3: Obtain the eccentricity vector of the center of the disk to be tested relative to the reference axis, and convert it to the simulated axis to obtain the target eccentricity vector of the center of the disk to be tested.

[0012] According to one embodiment of the present invention, before step 1, the method further includes:

[0013] The core unit is installed on a support platform; wherein, the support platform is provided with a rotating support, and one end of the high-pressure compressor rotor is rotatably engaged with the rotating support.

[0014] According to one embodiment of the present invention, the support platform is a mobile platform.

[0015] According to one embodiment of the present invention, the stator casing is provided with a rolling support on the outside of the high-pressure turbine rotor, the high-pressure turbine rotor is rotatably engaged with the rolling support, and the reference axis is determined by the rolling support.

[0016] According to an embodiment of the present invention, step 3 includes:

[0017] Step 31: Determine the number of measuring points and the angle value of each measuring point;

[0018] Step 32: Determine the simulated axis of the disk center to be tested based on the runout measurements of the first journal reference and the second journal reference.

[0019] According to one embodiment of the present invention, the simulated axis is determined by the least squares method, as shown in the following formula:

[0020]

[0021] Where a, b, c, u, v, w are the simulated axis parameters; m is the number of measuring points for one revolution of the core machine; pi is the runout measurement value of the i-th measuring point of the front axle reference; qi is the runout measurement value of the i-th measuring point of the rear axle reference; θ i α is the measuring point angle value; h is the measuring point angle correction value; and h is the axial distance between the front axle reference and the rear axle reference.

[0022] According to one embodiment of the present invention, the formula for obtaining the eccentricity vector of the center of the disk to be measured relative to the reference axis and converting it to the simulated axis is as follows:

[0023]

[0024] Wherein, P is the eccentricity of the center of the disk to be tested relative to the reference axis; β is the eccentricity angle of the center of the disk to be tested relative to the reference axis. z P is the eccentricity of the center of the disk under test relative to the simulated axis; z β is the eccentricity angle of the disk center under test relative to the simulated axis; h0 is the axial distance between the disk center under test and the front axle reference.

[0025] The present invention also provides a combined eccentricity measurement system based on a simulated axis, characterized in that it is used to implement the combined eccentricity measurement method based on a simulated axis as described above, the measurement system comprising:

[0026] The core machine is mounted on the support platform.

[0027] An industrial control computer is connected to a data acquisition mechanism at one end. The data acquisition mechanism includes a first inductive sensor, a second inductive sensor, a third inductive sensor, and an angle sensor.

[0028] The first inductive sensor is used to collect runout measurement data of the front axle reference, the second inductive sensor is used to collect runout measurement data of the rear axle reference, the third inductive sensor is used to collect runout measurement data of the disk center under test, and the angle sensor is used to collect the rotation angle of the core rotor.

[0029] The present invention also proposes an electronic device comprising: a processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions being executed by the processor to implement the combined eccentricity measurement method based on analog axes as described above.

[0030] The present invention also proposes a readable storage medium on which a program or instruction is stored, which, when executed by a processor, implements the combined eccentricity measurement method based on analog axes as described above.

[0031] The positive and progressive effects of this invention are as follows:

[0032] This invention is based on a combined eccentricity measurement method using a simulated axis. While detecting the runout measurement point of the center of the disk to be tested, it also detects the runout measurement points at the front axis reference and the rear axis reference. The simulated axis is obtained through the runout measurement points at the front axis reference and the rear axis reference. Then, the eccentricity vector of the center of the disk to be tested relative to the support is converted to the simulated axis to finally obtain the target eccentricity vector. This effectively suppresses the systematic error caused by traditional detection methods and does not require excessive reliance on the manufacturing precision of the turntable, thus reducing the machining difficulty. Attached Figure Description

[0033] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein:

[0034] Figure 1 This is a schematic diagram of the combined eccentricity measurement system based on simulated axes according to the present invention;

[0035] Figure 2 This is a flowchart of the combined eccentricity measurement method based on simulated axes according to the present invention;

[0036] Figure 3 This is a schematic diagram of the arrangement of the core machine runout measuring points of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of the electronic device of the present invention.

[0038] 1. Support platform;

[0039] 2. Core machine;

[0040] 3. Industrial control computer;

[0041] 4. Data acquisition mechanism; 41. First inductive sensor; 42. Second inductive sensor; 43. Third inductive sensor; 44. Angle sensor;

[0042] 5. The center of the test plate. Detailed Implementation

[0043] The present invention will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0045] Please refer to Figures 1 to 3 This invention proposes a combined eccentricity measurement method based on simulated axes, comprising:

[0046] Step 1: Obtain the simulated axis of the core machine based on the runout measurement points of the front and rear shaft references of the core machine; wherein, the front shaft reference is the first journal reference of the high-pressure compressor rotor, and the rear shaft reference is the second journal reference of the high-pressure turbine rotor.

[0047] The process includes the following steps before step 1:

[0048] The core unit is installed on the support platform; the support platform is equipped with a rotating support, and one end of the high-pressure compressor rotor is rotatably engaged with the rotating support.

[0049] Specifically, the supporting platform is a mobile platform.

[0050] That is, the rotating support set on the support platform is used to cooperate with the high-pressure compressor rotor, which facilitates the rotation of the core machine as a whole.

[0051] Using a mobile platform for support makes it more flexible, allowing the measuring device to be moved to a suitable location for testing according to different needs.

[0052] For example, four omnidirectional wheels are provided at the bottom of the support platform. In some other implementations, other optional methods of movement may also be used, which are not limited here.

[0053] Please refer to Figure 3 In this invention, the shaft diameter reference of the high-pressure compressor rotor is used as the first journal reference A, and the shaft diameter reference of the high-pressure turbine rotor is used as the second shaft diameter reference B. The shaft diameter reference of the disk center to be tested is P.

[0054] In traditional measurement processes, the high-pressure rotor is supported in a vertical position. Due to the angular swing of the support at the first journal reference and the second shaft diameter reference, the rotor shaft cannot rotate along the fixed shaft, and the rotation axis is not the shaft of the engine in operation. This will result in the inability to obtain accurate concentricity of the test disc center relative to the front and rear references, and the overall measurement structure will cause significant errors in the measurement results.

[0055] The two supports mentioned above, the first journal reference and the second shaft diameter reference, are respectively: the rotational support on the support platform and the rolling support set on the outside of the stator casing on the high-pressure turbine rotor.

[0056] Step 2: Determine the reference axis based on the support of the high-pressure compressor rotor or the high-pressure turbine rotor.

[0057] The reference axis here can be determined by either a rotary support or a rolling support; no limitation is made here. Furthermore, the specific structural form of the rotary support and the rolling support is also not limited.

[0058] Step 3: Obtain the eccentricity vector of the center of the disk to be tested relative to the reference axis, and convert it to the simulated axis to obtain the target eccentricity vector of the center of the disk to be tested.

[0059] Specifically, step 3 includes:

[0060] Step 31: Determine the number of measuring points and the angle value of each measuring point; the number of measuring points can be determined as needed and is not limited here.

[0061] Step 32: Determine the simulated axis of the disk center to be tested based on the runout measurements of the first journal reference and the second journal reference.

[0062] The simulated axis is determined using the least squares method, as shown in the following formula:

[0063]

[0064] Where a, b, c, u, v, w are the simulated axis parameters; m is the number of measuring points per revolution of the core machine; p i θ represents the runout measurement at the i-th measuring point on the front axle reference; qi represents the runout measurement at the i-th measuring point on the rear axle reference; i α is the angle value of the measuring point; h is the axial distance between the front axle reference and the rear axle reference.

[0065] Furthermore, the formula for obtaining the eccentricity vector of the center of the disk under test relative to the reference axis and converting it to the simulated axis is as follows:

[0066]

[0067] Where P is the eccentricity of the center of the disk to be measured relative to the reference axis; β is the eccentricity angle of the center of the disk to be measured relative to the reference axis. z P is the eccentricity of the disk center under test relative to the simulated axis; z β is the eccentricity angle of the disk center under test relative to the simulated axis; h0 is the axial distance between the disk center under test and the front axle reference.

[0068] This invention, when detecting the runout measurement points of the test disc center, also simultaneously detects the runout measurement points at the front axle and rear axle references. A simulated axis is obtained from these runout measurement points. Then, the eccentricity vector of the test disc center relative to the support is converted to the simulated axis, ultimately yielding the target eccentricity vector. This effectively suppresses the systematic errors introduced by traditional detection methods and eliminates the over-reliance on the manufacturing precision of the turntable, reducing machining difficulty. It solves the problems of large runout detection errors in traditional engine disc centers, the inability to measure effective eccentricity due to turntable systematic errors, high cost, and large, inflexible equipment layout.

[0069] Please continue to refer to Figure 1 The present invention also proposes a combined eccentricity measurement system based on a simulated axis, characterized in that, for implementing the above-mentioned combined eccentricity measurement method based on a simulated axis, the measurement system includes:

[0070] Support platform 1, core machine 2 is installed on support platform 1; support platform 1 can be a non-mobile platform or a mobile platform, which is not limited here.

[0071] The industrial computer 3 is connected to a data acquisition mechanism 4 at one end. The data acquisition mechanism 4 includes a first inductive sensor 41, a second inductive sensor 42, a third inductive sensor 43, and an angle sensor 44.

[0072] The first inductive sensor 41 is used to collect runout measurement data of the front axle reference, the second inductive sensor 42 is used to collect runout measurement data of the rear axle reference, the third inductive sensor 43 is used to collect runout measurement data of the disk center 5 under test, and the angle sensor 44 is used to collect the rotation angle of the rotor of the core machine 2.

[0073] The first inductive sensor 41, the second inductive sensor 42, and the third inductive sensor 43 can be distributed at the same angle along the circumference of the engine or distributed at a fixed angle along the circumference. The measurement positions are the front axle reference, the rear axle reference, and the disk center 5 to be measured, respectively. The two ends of the disk center 5 to be measured are respectively engaged with the rotating support 6 and the rolling support 7.

[0074] Angle sensors 44 are located at the rear of the system and are used to detect the rotation angle phase.

[0075] The measurement system provided by this invention achieves high-precision detection through measurement algorithms, reducing the dependence on the machining accuracy of mechanical structures.

[0076] Reference Figure 4 The present invention also provides an electronic device 900, including a processor 901 and a memory 902. The memory 902 stores programs or instructions that can run on the processor 901. The programs or instructions are executed by the processor 901 to perform the aforementioned combined eccentricity measurement method based on analog axes. When the program or instructions are executed by the processor 901, they implement the various processes of the aforementioned implementation of the combined eccentricity measurement method based on analog axes and achieve the same technical effects. To avoid repetition, further details are omitted here.

[0077] The present invention also provides a readable storage medium storing a program or instructions, which, when executed by a processor, implement the combined eccentricity measurement method based on analog axes as described above. When the program or instructions are executed by the processor, they implement each process of the above-described implementation of the combined eccentricity measurement method based on analog axes, and achieve the same technical effects; therefore, to avoid repetition, they will not be described in detail here.

[0078] For those skilled in the art, the above disclosure is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0079] Furthermore, this application uses specific terms to describe its embodiments. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of this application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0080] Some aspects of this application can be executed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The aforementioned hardware or software may be referred to as a "data block," "module," "engine," "unit," "component," or "system." The processor may be one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DAPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or combinations thereof. Furthermore, aspects of this application may manifest as computer products residing in one or more computer-readable media, including computer-readable program code. For example, computer-readable media may include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, magnetic tapes, etc.), optical discs (e.g., compressed CDs, digital multifunction DVDs, etc.), smart cards, and flash memory devices (e.g., cards, sticks, key drives, etc.).

[0081] A computer-readable medium may contain a propagated data signal containing computer program code, for example, on baseband or as part of a carrier wave. This propagated signal may take various forms, including electromagnetic, optical, and so on, or suitable combinations thereof. A computer-readable medium can be any computer-readable medium other than a computer-readable storage medium, which can be connected to an instruction execution system, apparatus, or device to enable communication, propagation, or transmission of a program for use. The program code located on the computer-readable medium can be propagated through any suitable medium, including radio, cable, fiber optic cable, radio frequency signals, or similar media, or any combination of the above media.

[0082] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the invention, the foregoing description of the embodiments of the present application sometimes combines multiple features into one embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the number of features in an embodiment is less than all the features of a single embodiment disclosed above. Some embodiments use numbers describing the quantity of components and attributes. It should be understood that such numbers used in the description of embodiments are modified in some examples with the modifiers "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the number is allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by the individual embodiment. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of the present application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0083] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

[0084] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation", "connection", "joining", and "fixing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can also refer to mechanical connections. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0085] This application uses specific terms to describe embodiments of the application. Terms such as "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0086] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A combined eccentricity measurement method based on simulated axes, characterized in that, include: Step 1: Obtain the simulated axis of the core machine based on the runout measurement points of the front and rear shaft references of the core machine; wherein, the front shaft reference is the first journal reference of the high-pressure compressor rotor, and the rear shaft reference is the second journal reference of the high-pressure turbine rotor; Step 2: Determine the reference axis based on the support of the high-pressure compressor rotor or the support of the high-pressure turbine rotor; Step 3: Obtain the eccentricity vector of the center of the disk to be tested relative to the reference axis, and convert it to the simulated axis to obtain the target eccentricity vector of the center of the disk to be tested.

2. The combined eccentricity measurement method based on simulated axes according to claim 1, characterized in that, Before step 1, the following is also included: The core unit is installed on a support platform; wherein, the support platform is provided with a rotating support, and one end of the high-pressure compressor rotor is rotatably engaged with the rotating support.

3. The combined eccentricity measurement method based on simulated axes according to claim 2, characterized in that, The support platform is a mobile platform.

4. The combined eccentricity measurement method based on simulated axes according to claim 1, characterized in that, The stator casing is provided with a rolling support on the outside of the high-pressure turbine rotor. The high-pressure turbine rotor is rotatably engaged with the rolling support, and the reference axis is determined by the rolling support.

5. The combined eccentricity measurement method based on simulated axes according to claim 1, characterized in that, Step 3 includes: Step 31: Determine the number of measuring points and the angle value of each measuring point; Step 32: Determine the simulated axis of the disk center to be tested based on the runout measurements of the first journal reference and the second journal reference.

6. The combined eccentricity measurement method based on simulated axes according to claim 5, characterized in that, The simulated axis is determined using the least squares method, as shown in the following formula: Where a, b, c, u, v, w are the simulated axis parameters; m is the number of measuring points for one revolution of the core machine; pi is the runout measurement value of the i-th measuring point of the front axle reference; qi is the runout measurement value of the i-th measuring point of the rear axle reference; θ i α is the measuring point angle value; h is the measuring point angle correction value; and h is the axial distance between the front axle reference and the rear axle reference.

7. The combined eccentricity measurement method based on simulated axes according to claim 1, characterized in that, The formula for obtaining the eccentricity vector of the center of the disk to be tested relative to the reference axis and converting it to the simulated axis is as follows: Wherein, P is the eccentricity of the center of the disk to be tested relative to the reference axis; β is the eccentricity angle of the center of the disk to be tested relative to the reference axis. z P is the eccentricity of the center of the disk under test relative to the simulated axis; z β is the eccentricity angle of the disk center under test relative to the simulated axis; h0 is the axial distance between the disk center under test and the front axle reference.

8. A combined eccentricity measurement system based on simulated axes, characterized in that, For implementing the combined eccentricity measurement method based on simulated axes as described in any one of claims 1-7, the measurement system comprises: The core machine is mounted on the support platform. An industrial control computer is connected to a data acquisition mechanism at one end. The data acquisition mechanism includes a first inductive sensor, a second inductive sensor, a third inductive sensor, and an angle sensor. The first inductive sensor is used to collect runout measurement data of the front axle reference, the second inductive sensor is used to collect runout measurement data of the rear axle reference, the third inductive sensor is used to collect runout measurement data of the disk center under test, and the angle sensor is used to collect the rotation angle of the core rotor.

9. An electronic device, characterized in that, include: A processor and a memory, the memory storing a program or instructions executable on the processor, the program or instructions being executed by the processor to implement the combined eccentricity measurement method based on any one of claims 1-7.

10. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the combined eccentricity measurement method based on any one of claims 1-7.

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