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CN-122015632-A - Combined eccentric measurement method and system based on simulation axis

CN122015632ACN 122015632 ACN122015632 ACN 122015632ACN-122015632-A

Abstract

The invention provides a combined eccentric measurement method and a combined eccentric measurement system based on an analog axis, wherein the measurement method comprises the steps of obtaining the analog axis of a core machine according to jumping measuring points of a front shaft reference and a rear shaft reference of the core machine; and obtaining an eccentric vector of the disc center to be measured relative to the reference axis, and converting the eccentric vector to the analog axis to obtain a target eccentric vector of the disc center to be measured. According to the combined eccentric measurement method based on the simulation axis, when the jumping measurement points of the disc center to be measured are detected, the jumping measurement points at the front axle reference and the rear axle reference are detected at the same time, the simulation axis is obtained through the jumping measurement points at the front axle reference and the rear axle reference, and then the eccentric vector determined by the relative support of the disc center to be measured is converted to the simulation axis, so that the target eccentric vector is finally obtained, the systematic error caused by the detection of the traditional method is effectively restrained, the manufacturing precision of a transition dependence turntable is not needed, and the machining difficulty is reduced.

Inventors

  • LI JIBAO
  • SU QIAOLING
  • FAN MINGZHENG

Assignees

  • 中国航发商用航空发动机有限责任公司

Dates

Publication Date
20260512
Application Date
20241112

Claims (10)

  1. 1. A combined eccentricity measurement method based on an analog axis, comprising: Step 1, obtaining a simulation axis of a core machine according to jumping measuring points of a front shaft reference and a rear shaft reference of the core machine, wherein the front shaft reference is a first journal reference of a high-pressure compressor rotor, and the rear shaft reference is a second journal reference of the high-pressure turbine rotor; Step 2, determining a reference axis according to the support of the high-pressure compressor rotor or the support of the high-pressure turbine rotor; And step 3, obtaining an eccentric vector of the disc center to be detected relative to the reference axis, and converting the eccentric vector to the analog axis to obtain a target eccentric vector of the disc center to be detected.
  2. 2. The method for combined eccentricity measurement based on simulated axes according to claim 1, further comprising, prior to said step 1: The core machine is mounted on a supporting platform, wherein a rotating support is arranged on the supporting platform, and one end of the high-pressure compressor rotor is in rotating fit with the rotating support.
  3. 3. The method of claim 2, wherein the support platform is a mobile platform.
  4. 4. The combined eccentricity measurement method based on a simulated axis according to claim 1, characterized in that a stator casing is provided with a rolling support outside the high-pressure turbine rotor, the high-pressure turbine rotor being in running fit with the rolling support, the reference axis being determined by the rolling support.
  5. 5. The method for combined eccentricity measurement based on simulated axes according to claim 1, characterized in that said step 3 comprises: Step 31, determining the number of measuring points and the angle value of each measuring point; And step 32, determining the simulation axis of the disc core to be tested according to the jitter measured values of the first journal reference and the second journal reference.
  6. 6. The method of claim 5, wherein the simulated axis is determined by least squares method, as follows: The device comprises a core machine, a front axle reference ith measuring point, a rear axle reference ith measuring point, a simulation axis parameter, wherein a, b, c, u, v and w are the simulation axis parameter, m is the number of measuring points for one circle of the core machine, pi is the jumping measuring value of the front axle reference ith measuring point, qi is the jumping measuring value of the rear axle reference ith measuring point, theta i is the measuring point angle value, alpha is the measuring point angle correction value, and h is the axial distance between the front axle reference and the rear axle reference.
  7. 7. The method for combined eccentricity measurement based on an analog axis according to claim 1, wherein the formula for obtaining an eccentricity vector of a hub to be measured with respect to the reference axis and converting the eccentricity vector to the analog axis is as follows: Wherein P is the eccentric amount of the disc center to be measured relative to the reference axis, beta is the eccentric angle phase of the disc center to be measured relative to the reference axis, z P is the eccentric amount of the disc center to be measured relative to the simulation axis, z beta is the eccentric angle phase of the disc center to be measured relative to the simulation axis, and h 0 is the distance between the disc center to be measured and the front axle reference along the axial direction.
  8. 8. A combined eccentricity measurement system based on a simulated axis for implementing a combined eccentricity measurement based on a simulated axis according to any of claims 1-7, said measurement system comprising: The core machine is arranged on the supporting platform; One end of the industrial personal computer is connected with a data acquisition mechanism, and the data acquisition mechanism comprises a first inductance measuring head, a second inductance measuring head, a third inductance measuring head and an angle sensor; the first inductance measuring head is used for collecting the jumping measuring point data of the front axle reference, the second inductance measuring head is used for collecting the jumping measuring point data of the rear axle reference, the third inductance measuring head is used for collecting the jumping measuring point data of the disc core to be measured, and the angle sensor is used for collecting the rotation angle of the core machine rotor.
  9. 9. An electronic device comprising a processor and a memory storing a program or instructions executable on the processor, the program or instructions being executable by the processor to implement the combined analog axis-based eccentricity measurement method of any one of claims 1-7.
  10. 10. A readable storage medium, characterized in that it has stored thereon a program or instructions, which when executed by a processor, implements the combined eccentricity measurement based on simulation axis according to any of claims 1-7.

Description

Combined eccentric measurement method and system based on simulation axis Technical Field The invention relates to the technical field of engine assembly, in particular to a combined eccentricity measurement method and system based on an analog axis. Background As a core component of the aeroengine, the assembly procedures and process parameters of the core machine are numerous, and the assembly quality and efficiency of the whole aeroengine are decisively influenced. The disk heartbeat at the joint surface of the high-pressure rotor reflects the combination state of the high-pressure rotor, and the eccentricity vector formed by the runout of the disk heartbeat directly influences the structural stability of the rotor and the vibration of the whole machine, so that the disk heartbeat is the most important technological parameter in the assembly of the core machine. In the traditional scheme, various complex special tools and equipment are needed for ensuring the accuracy of disc heartbeat measurement. The main stream machine types at home and abroad mostly adopt fixed assembly measuring platforms with high-precision air-float rotary tables as bases, but the mode has the problems of complex equipment, high cost, poor arrangement flexibility, complex operation, difficult elimination of errors and the like, the detection precision is dependent on the air-float rotary precision of the fixed assembly platforms, and the high-precision manufacturing and processing technology becomes the bottleneck of scientific research production of the detection position. Based on the above, the present inventors have proposed a combined eccentricity measurement method and system based on an analog axis, so as to solve the above-mentioned technical problems. Disclosure of Invention The invention aims to overcome the defects of large systematic error, excessive dependence on the manufacturing precision of a turntable and high cost in the prior art, and provides a combined eccentric measurement method and system based on an analog axis. The invention solves the technical problems by the following technical proposal: The invention provides a combined eccentricity measurement method based on an analog axis, which is characterized by comprising the following steps of: Step 1, obtaining a simulation axis of a core machine according to jumping measuring points of a front shaft reference and a rear shaft reference of the core machine, wherein the front shaft reference is a first journal reference of a high-pressure compressor rotor, and the rear shaft reference is a second journal reference of the high-pressure turbine rotor; Step 2, determining a reference axis according to the support of the high-pressure compressor rotor or the support of the high-pressure turbine rotor; And step 3, obtaining an eccentric vector of the disc center to be detected relative to the reference axis, and converting the eccentric vector to the analog axis to obtain a target eccentric vector of the disc center to be detected. According to one embodiment of the present invention, before the step 1, the method further includes: The core machine is mounted on a supporting platform, wherein a rotating support is arranged on the supporting platform, and one end of the high-pressure compressor rotor is in rotating fit with the rotating support. According to one embodiment of the invention, the support platform is a mobile platform. According to one embodiment of the invention, the stator casing is provided with a rolling support outside the high-pressure turbine rotor, which is in running fit with the rolling support, the reference axis being determined by the rolling support. According to one embodiment of the present invention, the step 3 includes: Step 31, determining the number of measuring points and the angle value of each measuring point; And step 32, determining the simulation axis of the disc core to be tested according to the jitter measured values of the first journal reference and the second journal reference. According to one embodiment of the invention, the simulation axis is determined by a least squares method, the formula: The device comprises a core machine, a front axle reference ith measuring point, a rear axle reference ith measuring point, a simulation axis parameter, wherein a, b, c, u, v and w are the simulation axis parameter, m is the number of measuring points for one circle of the core machine, pi is the jumping measuring value of the front axle reference ith measuring point, qi is the jumping measuring value of the rear axle reference ith measuring point, theta i is the measuring point angle value, alpha is the measuring point angle correction value, and h is the axial distance between the front axle reference and the rear axle reference. According to one embodiment of the present invention, the formula for obtaining the eccentric vector of the hub to be measured relative to the reference axis and converting the eccentric vector to the