| Citation: | WANG Junxi, REN Jiahai, TANG Fulong. Analysis and control of dummy balance process of aero-engine high pressure rotor[J]. Journal of Aerospace Power, 2023, 38（3）：522-534 doi: 10.13224/j.cnki.jasp.20210460
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In view of the lack of mathematical analysis means of dummy balance process for high pressure rotor of high bypass ratio aero-engine and the lack of basis for technical indexes of dummy rotor, a quantitative analysis method of dummy balance process was proposed. The rotor unbalance state was represented by the static and couple unbalance vector passing through the rotor center of gravity. The dummy rotor model including weight deviation, center of gravity position deviation, moment of inertia deviation and end runout deviation was defined. Combined with the dummy balance process of high pressure rotor and the principle of index balance, the mathematical model of rotor correction unbalance and index compensation was established. And, the initial unbalance of high pressure combined rotor was used to evaluate the dummy balance quality. Results showed that, the dummy balance can replace the combined balance, and the two balanced rotors had the characteristics of assembly interchangeability and unrestricted assembly docking angle; in this case, in order to control the dummy balance quality, the dummy rotor weight deviation should be within ±4%, the center of gravity position deviation should be within ±2 mm, the diameter and polar moment of inertia deviation should be within ±5%, and the end runout deviation should be less than 0.008 mm.
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