Abstract

Aiming at the problem of insufficient research on the concentricity of the third and fifth fulcrum of aeroengine, the prediction of concentricity of the third and fifth fulcrum and its influencing factors are studied. Firstly, the structural characteristics and assembly process of typical aero-engine casing are analyzed, and the three-dimensional model of the casing is established. Then, the assembly deviation model of the concentricity of the aeroengine casing and the third and fifth fulcrum is established by using the professional deviation simulation analysis software 3DCS to predict the concentricity. According to the prediction results and the assembly process of the casing parts in the actual production, the effect of the three factors (deviation size, assembly benchmark and assembly sequence) of the casing on the concentricity of the third and fifth fulcrum is analyzed. The result has certain guiding significance for improving the assembly quality of the concentricity of the third and fifth fulcrum of aeroengine in actual production.

Keywords

Aero-engine, casing, the third and fifth fulcrum, assembly, deviation, concentricity.