In order to improve the concentricity level and stability of concentricity measurement results after the assembly of high pressure compressor rotors in aircraft engines

as well as the accuracy of predicting results during the assembly process

research has been conducted on issues such as the inability to optimize the perpendicularity of the rear end face of the components and poor repeatability of concentricity measurement results during the assembly of compressor rotors. By establishing the calculation model of the eccentricity of the middle section of the core machine rotor

found that the influence of the perpendicularity error of the back end face of the compressor rotor on the eccentricity of the middle section of the core machine rotor was 3.4 times that of the concentricity error. By establishing the datum correction model of the concentricity measurement process of the compressor rotor

it is analyzed that the reasons for the poor repeatability of the measurement results and the poor accuracy of prediction results are that the ratio of the rotor height to the radius of the reference end face is large

which makes the corrected results highly sensitive to the slight differences in the fitting surfaces of the reference end faces of the front shaft at different radial positions. Therefore

by reducing the ratio of the rotor height to the radius of the reference end face

taking the back end face as the measurement datum and improving the stack assembly direction

not only could the stability of the rotor concentricity measurement results be improved

but also the influence of the perpendicularity of the back end face could be considered in the stack optimization process. The verification results show that the concentricity error of the rotor is reduced by 68%

and the repeatability error of the measurement results decreases from 32% to 13%.