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针对烧结机星轮轴的改造问题,结合其低速重载的实际工况,采用理论计算、有限元分析及模型试验相结合的方式研究了星轮接轴的结构和过盈配合,传统算法因采用厚壁圆筒的简化结构而使结果比较保守,数值偏小,有限元法由于具有精确的建模技术,能够充分反映零件实际结构对计算变量的影响,因此结果更加真实可靠。有限元分析亦能给出整个装配结构的应力分布和配合面上的接触压力分布情况,突破了传统算法求解的局限性,并能准确地反映出结构件比较敏感的应力集中现象的分布位置及大小,分析结果对于确定合理的过盈量、优化零件结构和改进加工工艺都具有参考价值,为今后烧结机星轮轴改造的工程应用提供了理论支持和数值参考。
According to the reconstruction of the star shaft of the sintering machine and the combination of its theoretical calculation, finite element analysis and model test, the structure and the interference fit of the star shaft are studied in combination with the actual conditions at low speed and heavy load. The simplified structure of the thick-walled cylinder makes the result conservative and the numerical value is small. Due to the accurate modeling technology, the finite element method can fully reflect the influence of the actual structure of the part on the calculated variable, so the result is more realistic and reliable. Finite element analysis can also give the stress distribution of the whole assembly structure and contact pressure distribution on the mating surface, breaking the limitation of the traditional algorithm and accurately reflecting the distribution of the stress concentration phenomena that are sensitive to the structural components and Size and analysis results have reference value for determining reasonable interference amount, optimizing the structure of parts and improving the processing technology, which provides theoretical support and numerical reference for future engineering application of sinter shaft rebuild.