| NIU Xiao-xia， LONG Yang， LU Wen-biao.Integrated Assembly and Measurement Method for LPT Rotor and Stator Based on Datum Control[J].航空发动机,2024,50(3):122-127 |
| Integrated Assembly and Measurement Method for LPT Rotor and Stator Based on Datum Control |
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| Key Words:concentricity of LPT rotor high-precision measurement integration of assembly and measurement datum control assembling precision aeroengine |
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| Abstract:In order to accurately measure and control the concentricity of the LPT （Low-Pressure Turbine） rotor of a high bypass
ratio engine. Research on high-precision integrated assembly and measurement methods for LPT stator and rotor based on datum control
was conducted according to the structural characteristics of multistage coupling and the requirement of 0.05mm rotor concentricity.
Positioning errors were eliminated by adjusting the measuring datum to coincide with the rotating axis. The influence of assembly opera?
tions on the datum was avoided， and the attitude of the measuring datum was kept consistent by the datum holding technique. By analyzing
the influence of centroid on rotor unbalance， a dedicated testing system was built to control the assembly results of concentricity of the LPT
rotor. This method was successfully applied to the assembly of the LPT rotor and stator， and the results show that the proposed method can
accurately measure the rotor runout of 0.0125mm， effectively avoid the out of tolerance of the LPT rotor initial unbalance， reduce repeti?
tive assembly and disassembly work， and improve assembling quality and efficiency， providing engineering guidance for high-precision
concentricity measurement of multi-stage component. |
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