涡喷发动机压气机叶轮、主轴以过盈配合的方式联结成一体。合理的过盈量既能保证压气机叶轮与主轴不产生相对滑动,又能保证温差法装配不损伤叶轮和主轴材料。利用Ansys软件采用子结构模型分析过盈量与装配应力、摩擦系数与转子应力、转速与接触面压力的大小关系及接触应力沿轴向分布情况。得出温差法装配合理过盈值,首次提出锥形过盈面模型,对涡喷发动机结构设计过程具有指导作用。

The impeller and the main shaft of the turbojet engine compressor were joined together in an interference fit manner. A reasonable magnitude of interference could not only prevents the relative slippage between the compressor impeller and the main shaft, but also guaranteed that the temperature difference method did not damage the impeller and main shaft material. Using software Ansys, the substructure model was used to analyze the relationship between magnitude of interference and assembly stress, frictional coefficient and rotor stress, rotation rate and interface pressure, and the distribution of contact stress along the axial direction. The reasonable magnitude of interference was obtained by temperature difference method, and the conical interference surface model was proposed for the first time, which had guiding function for the architectural design of turbojet engine.