CN-122020883-A - Turbine rotor time sequence cooperative life verification method, system and storage medium

CN122020883ACN 122020883 ACN122020883 ACN 122020883ACN-122020883-A

Abstract

The invention discloses a method, a system and a storage medium for verifying the sequential collaborative life of a turbine rotor, which belong to the technical field of aeroengines and comprise the steps of determining stress coefficients of pre-checking parts of turbine disc-baffle assemblies in a fatigue test upper limit rotating speed state, determining the number of test cycles required by the turbine disc-baffle assemblies when the turbine disc-baffle assemblies are verified to a preset target safe life index based on the stress coefficients, determining baffle assembly replacement and reinstallation time nodes based on the test cycle numbers, executing sequential life tests comprising component replacement by the turbine disc-baffle assemblies by the replacement and reinstallation time nodes, and judging whether the turbine disc-baffle assemblies reach the verification target of the preset target safe life index after the sequential life tests are completed. The method for verifying the time sequence cooperative life of the multiple parts of the turbine rotor based on the separation principle is provided, so that the verification of the time sequence cooperative life of the multiple parts of the gas turbine rotor is realized, and the problem of the verification of the turbine disc-baffle plate assembly is effectively solved.

Inventors

CHEN HUANHUAN
LI KEKE
FAN YUQING
HUANG KAIMING
LIU YANG
AI SHUMIN
WU YANGYANG
Tang yiting

Assignees

中国航发湖南动力机械研究所

Dates

Publication Date: 20260512
Application Date: 20260112

Claims (10)

1. A method for verifying a time-series coordinated lifetime of a turbine rotor, the method comprising: Determining a stress coefficient of a pre-checking part of the turbine disc-baffle plate assembly in the upper limit rotating speed state of the fatigue test; Determining a number of test cycles required for the turbine disk-baffle assembly to verify to a predetermined target safe life indicator based on the stress coefficient; determining baffle assembly replacement and reinstallation time nodes based on the number of test cycles; performing a sequential life test including component replacement on the turbine disk-baffle assembly according to the replacement and reinstallation time nodes; After the sequential life test is completed, a determination is made as to whether the turbine disk-baffle assembly has reached a verification target for the predetermined target safe life indicator.
2. The turbine rotor timing coordinated life verification method of claim 1, wherein the turbine disk-baffle assembly pre-assessment site stress coefficient determination comprises: obtaining the equivalent stress of the pre-checking part in the fatigue test upper limit rotating speed state through finite element analysis; And calculating the stress coefficient based on the equivalent stress and the material performance data of the turbine disc-baffle assembly, wherein the stress coefficient represents the fatigue damage rate of the pre-assessment part under the test working condition.
3. The turbine rotor timing cooperative life verification method according to claim 1 or 2, wherein the calculation formula of the test cycle number is: Where N i represents the number of test cycles required for the turbine disk-baffle assembly to verify to a predetermined target safe life indicator, K represents the life dispersion coefficient, N f represents the predetermined target safe life indicator, a represents the stress coefficient, and p represents the fatigue property index.
4. The turbine rotor timing coordinated life verification method of claim 1 or 2, wherein the determination of the baffle assembly replacement and reinstallation time node comprises: and determining the replacement and reinstallation time nodes of the baffle assembly according to the difference of the test cycle numbers required by the baffle assembly and the turbine disk to reach the verification targets respectively.
5. The turbine rotor timing coordinated life verification method of claim 4, wherein said performing sequential life testing comprises: stopping the test when the baffle assembly reaches the test cycle number required by the verification target, disassembling the turbine disc-baffle assembly for nondestructive testing, and verifying the target safety life index of the baffle assembly; and (3) assembling a new baffle, suspending the test when the turbine disk reaches the test cycle number required by the verification target, and disassembling the turbine disk-baffle assembly for nondestructive testing to verify the target safe life index of the turbine disk.
6. The turbine rotor timing coordinated life verification method of claim 1 or 2, wherein the determination of the baffle assembly replacement and reinstallation time node comprises: Setting a plurality of preset target safety life indexes to be verified of the turbine disc-baffle plate assembly, wherein the preset target safety life indexes comprise a previous target safety life index and a subsequent target safety life index; calculating the number of test cycles required by the turbine disc and the baffle assembly to verify each preset target safe life index respectively; When the target safe life index of the next time is verified, determining a replacement and reinstallation time node of the baffle assembly based on the number of test cycles required for the baffle assembly to verify the target safe life index of the next time, the number of test cycles required for the baffle assembly to verify the target safe life index of the previous time and the number of test cycles required for the turbine disk to verify the target safe life index of the previous time; And executing a multi-stage time sequence cooperative life test comprising baffle assembly replacement according to the replacement and reinstallation time nodes.
7. The turbine rotor timing cooperative life verification method of claim 6, wherein the multi-stage timing cooperative life test comprises: stopping the test when the baffle assembly reaches the number of test cycles required by the previous verification target, disassembling the turbine disc-baffle assembly for nondestructive testing, and verifying the previous target safety life index of the baffle assembly; assembling a new baffle, suspending the test when the turbine disk reaches the number of test cycles required by the previous verification target, disassembling the turbine disk-baffle assembly for nondestructive testing, and verifying the previous target safety life index of the turbine disk; Resetting the baffle assembly, suspending the test when the baffle assembly reaches the test cycle number required by the next verification target, disassembling the turbine disc-baffle assembly for nondestructive testing, and verifying the next target safety life index of the baffle assembly; and (3) assembling a new baffle, suspending the test when the turbine disc reaches the number of test cycles required by the next verification target, disassembling the turbine disc-baffle assembly for nondestructive testing, and verifying the next target safety life index of the turbine disc.
8. The turbine rotor timing coordinated life verification method of claim 7, wherein the verification result determination further comprises: after the sequential life test is completed, if the actual safety life of the turbine disk-baffle assembly is required to be verified, reinstalling the baffle assembly and continuing the test along with the turbine disk until the total life test cycle number is reached; and stopping the test when the turbine disc-baffle assembly reaches the full life test cycle number, and verifying the actual life of the turbine disc-baffle assembly.
9. A turbine rotor time sequence cooperative life test system is characterized by comprising a coefficient determination module, a cycle number determination module, a time determination module, a test module and a verification module, The coefficient determining module is configured to determine a stress coefficient of a pre-checking part of the turbine disc-baffle plate assembly in the fatigue test upper limit rotating speed state; A cycle number determination module configured to determine a number of test cycles required for the turbine disk-baffle assembly to verify to a predetermined target safe life indicator based on the stress coefficient; a time determination module configured to determine a baffle assembly replacement and reinstallation time node based on the number of trial cycles; a test module configured to perform a sequential life test including component replacement on the turbine disk-baffle assembly according to the replacement and reinstallation time nodes; A verification module configured to determine, after completion of the sequential life test, whether the turbine disk-baffle assembly meets a verification target of the predetermined target safe life indicator.
10. A computer storage medium storing one or more instructions which, when executed by one or more computers, cause the one or more computers to implement the method of any one of claims 1-8.

Description

Turbine rotor time sequence cooperative life verification method, system and storage medium Technical Field The invention belongs to the technical field of aeroengines, and particularly relates to a method, a system and a storage medium for verifying the time sequence cooperative life of a turbine rotor. Background The turbine disc and the baffle are in a commonly adopted structural form of the gas turbine rotor of the advanced aeroengine, the low-cycle fatigue test of the turbine disc is usually carried out on a vertical rotary tester, and as the component tester is difficult to simulate the temperature load of the real working state of the engine, the test is usually carried out by adopting a uniform temperature field, and the non-uniform temperature distribution and thermal stress in the engine are difficult to completely reproduce. The uniform temperature field eliminates the thermal stress influence of the temperature gradient on the wheel center, and generally the test rotating speed needs to be increased to ensure that the stress level of the wheel center is equivalent to the working state of the engine under the test condition. Because the local stress of key parts on the baffle is not obviously influenced by the temperature gradient, the stress level of the parts is higher, and the parts are often in a checking state. In addition, the gas turbine disk and the baffle are usually tested as a complete rotor test piece according to the same life index, so that the inspected baffle is relatively more prone to fatigue failure. In order to verify the safety life reserve of a gas turbine rotor, after the test verification of the design life index is completed, a life-sinking test is also typically performed to gradually verify the safety life of the gas turbine rotor. If the center, the mortise and the eccentric hole of the turbine disk, the spigot, the bolt hole, the vent slot and the like on the baffle plate are to be checked at the same time, the baffle plate is more checked, and the risk of fatigue failure is high. Disclosure of Invention In order to solve the above problems, the present invention provides a method for verifying the time sequence cooperative lifetime of a turbine rotor, the method comprising: Determining a stress coefficient of a pre-checking part of the turbine disc-baffle plate assembly in the upper limit rotating speed state of the fatigue test; Determining a number of test cycles required for the turbine disk-baffle assembly to verify to a predetermined target safe life indicator based on the stress coefficient; determining baffle assembly replacement and reinstallation time nodes based on the number of test cycles; performing a sequential life test including component replacement on the turbine disk-baffle assembly according to the replacement and reinstallation time nodes; After the sequential life test is completed, a determination is made as to whether the turbine disk-baffle assembly has reached a verification target for the predetermined target safe life indicator. Further, the determining of the turbine disk-baffle assembly pre-assessment site stress coefficient includes: obtaining the equivalent stress of the pre-checking part in the fatigue test upper limit rotating speed state through finite element analysis; And calculating the stress coefficient based on the equivalent stress and the material performance data of the turbine disc-baffle assembly, wherein the stress coefficient represents the fatigue damage rate of the pre-assessment part under the test working condition. Further, the calculation formula of the test cycle number is as follows: Where N i represents the number of test cycles required for the turbine disk-baffle assembly to verify to a predetermined target safe life indicator, K represents the life dispersion coefficient, N f represents the predetermined target safe life indicator, a represents the stress coefficient, and p represents the fatigue property index. Further, the determination of the baffle assembly replacement and reinstallation time node includes: and determining the replacement and reinstallation time nodes of the baffle assembly according to the difference of the test cycle numbers required by the baffle assembly and the turbine disk to reach the verification targets respectively. Further, the performing the sequential life test includes: stopping the test when the baffle assembly reaches the test cycle number required by the verification target, disassembling the turbine disc-baffle assembly for nondestructive testing, and verifying the target safety life index of the baffle assembly; and (3) assembling a new baffle, suspending the test when the turbine disk reaches the test cycle number required by the verification target, and disassembling the turbine disk-baffle assembly for nondestructive testing to verify the target safe life index of the turbine disk. Further, the determination of the baffle assembly replacement and reinstallation time