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为了更合理地设计套齿结构的配合关系,提高套齿结构配合精度,适应不对中运行工况,降低对加工误差的敏感度,研究了航空发动机套齿结构在倾角不对中的情况下的运动特点以及配合关系,并推导了含有倾角不对中的套齿结构齿侧间隙以及与之相关的套齿特征量的计算公式,对某型航空发动机的压气机轴径套齿结构进行了计算与分析。在此基础上,考虑到参数的随机性,应用果蝇优化算法对套齿结构齿侧间隙进行了稳健性优化设计。结果表明:计算公式中考虑倾角的影响能够有效地避免运动干涉和装配预应力,稳健性优化设计可以有效地避免由于倾角不对中、加工误差等参数随机因素导致齿侧间隙的设计值偏大。证明了所提出的计算和优化方法可以使套齿结构配合关系的设计更加合理,可为套齿结构设计、装配提供参考。
In order to more rationally design the mating relationship between sleeve teeth, improve the precision of sleeve teeth fitting, adapt to the misalignment condition and reduce the sensitivity to machining errors, the motion of the aero-engine sleeve gear in the case of misalignment Characteristics and mating relationship of the aeroengines, and the calculation formulas of the tooth-side clearances of the set-teeth structures with misalignment and the related characteristics of the set of teeth are derived. . On this basis, taking into account the randomness of the parameters, the fruit fly optimization algorithm was applied to optimize the tooth-side clearance of the tooth set structure. The results show that considering the influence of inclination can effectively avoid the movement interference and prestressing, the optimal design of robustness can effectively avoid the large design value of the tooth-side clearance due to random factors such as misalignment and machining error. It is proved that the proposed calculation and optimization method can make the design of the mating relationship of the set of teeth more reasonable and provide a reference for the design and assembly of the set of teeth.