Test device and method for eliminating residual stress through pre-rotation of turbine blank disc

Abstract

The invention discloses a test device and method for eliminating residual stress through pre-rotation of a turbine blank disc, and belongs to the technical field of aero-engines and gas turbines. A driving main shaft in the device drives a switching tool to rotate, the switching tool comprises a core shaft, a turbine blank disc and a pressing part, a limiting protection mechanism is arranged on the outer side of the core shaft, the top of the core shaft is connected with the driving main shaft, a flange base for installing the turbine blank disc is arranged at the bottom of the core shaft, andthe turbine blank disc is fixed through the pressing part. In the testing process, the rotating speed, vibration and deformation of the turbine blank disc are monitored and displayed in real time through the monitoring system, and the pre-selected rotating speed increasing and decreasing process is controlled by setting the target rotating speed, the target deformation amount and the vibration limiting value. The purpose of eliminating overspeed pre-rotation of the residual stress of the turbine blank disc of the aero-engine and the gas turbine is achieved, the residual stress in the turbineblank disc is greatly reduced, the mechanical performance of the turbine blank disc is improved, machining deformation is reduced, and the production period is shortened.

Description

technical field [0001] The invention relates to a test device and method for overspeed pre-rotation of blank disks to eliminate residual stress, which are used in the technical fields related to the production, processing and application of turbine disks of aeroengines and gas turbines. Background technique [0002] The turbine discs of aero-engines and gas turbines work in a high-temperature and high-stress environment for a long time, and have extremely high requirements on material performance. They need to have high temperature resistance and high strength characteristics at the same time. For this reason, special forging and heat treatment processes are required. In addition, the high energy conversion efficiency requirements of aero-engines make the turbine rotor structure must have extremely high dimensional accuracy and long-term dimensional stability. [0003] The complex forging and heat treatment process of the turbine disk material will generate extremely large r...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problem that it is difficult to eliminate the residual stress of the existing aero-engine and gas turbine turbine blank disk, and provides a test device and method for pre-rotating the turbine blank disk to eliminate the residual stress. The present invention uses the pre-rotation method to achieve the purpose of eliminating the residual stress , first install the blank turbine disc

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