基于实测数据的航空发动机转子叶尖装配间隙预测

Taking the multi-stage rotor and stator assembly process as the research object, and based on the spatial geometric transformation theory and the shape and position tolerance theory, a multi-stage rotor blade tip clearance prediction method was proposed. Specifically, the rotor and stator system was divided into three subsystems: rotor, stator and support. The submodels of assembly deviation were established for each subsystem. The coordinates of each sub-model were unified. The measured deviation data of fitting surface were taken as the input to calculate the rotor blade tip coordinates and casing coordinates at the same axial position, so as to calculate the rotor blade tip clearance. The test results showed that the prediction model could accurately predict the rotor blade tip clearance, and the maximum relative error of prediction was 11%, thus providing a reference for the assembly quality analysis.