叶轮部装结构的装配性能分析

为了研究大型压缩机组用闭式叶轮在装配过程中及装配完成后主轴抱弯的产生机理,减少事故的发生,以某大型压缩机组用闭式叶轮部装结构为研究对象,以有限元法为基础,利用非线性接触理论,分析叶轮部装结构在装配过程结束达到稳态后,轮毂与轴接触处的应力大小与分布情况,并根据分析结果对部装结构进行优化,使接触应力分布更加合理,优化了部装结构的装配工艺性。经整机运行试验验证使用优化后的部装结构,大幅度降低了弯轴事故的发生率。

Analysis on Assemblability of Impeller Assembly Structure

In order to understand mechanism ofbending shaftduring and after assembly occurred in the closed impeller assembly of large turbine compressor and to avoid this fault,an impeller assembly was studied by using FEM and the nonlinear contact theory.The magnitude and distribution of stress on the contact area between the hub and shaft were examined from end of assembly process until it became steady. Based on the obtained data,the structure of the impeller assembly was optimized to rationalize the contact stres...