径流式叶轮周期性有限元强度振动数值研究
发布时间：2019-02-16 06:02
【摘要】：径流式叶轮是向心透平、离心压缩机和离心泵等旋转机械的重要部件,在工作状态下承受着巨大的离心力,其安全可靠性至关重要。以某向心透平叶轮为研究对象,基于周期循环对称叶轮强度振动有限元分析理论,建立了向心透平叶轮周期循环对称数值计算模型,分析获得了其在工作转速状态下的变形、应力、固有频率及振型,计算结果表明:向心透平叶轮的最大等效应力为113MPa,位于叶轮本体内环表面靠近进口处,该值远小于材料的屈服极限,说明叶轮满足强度要求;进一步将计算结果与整圈模型计算结果进行对比,不仅验证了周期循环对称模型计算结果的可靠性,还说明采用周期对称模型对径流式叶轮进行强度和振动分析可以在保证计算精度的前提下极大地提高计算效率。
[Abstract]:The run-off impeller is an important part of the rotating machinery, such as centripetal turbine, centrifugal compressor and centrifugal pump. It bears a huge centrifugal force in the working state, and its safety and reliability is very important. Based on the finite element analysis theory of the strength vibration of a concentric turbine impeller and based on the theory of periodic cyclic symmetric impeller strength vibration, a numerical model of cyclic symmetry of a concentric turbine impeller is established, and its deformation under the condition of working speed is analyzed. The calculation results show that the maximum equivalent stress of the concentric turbine impeller is 113 MPA, which is located near the inlet of the inner ring surface of the impeller body, which is far less than the yield limit of the material, indicating that the impeller meets the strength requirement. Furthermore, the calculation results are compared with those of the whole cycle model, which not only verifies the reliability of the calculation results of the periodic cyclic symmetric model, It is also shown that the calculation efficiency can be greatly improved by using the periodic symmetry model to analyze the strength and vibration of the runoff impeller under the premise of ensuring the calculation accuracy.
【作者单位】： 海军驻大连426厂军代表室;
【分类号】：TH113.1
[Abstract]:The run-off impeller is an important part of the rotating machinery, such as centripetal turbine, centrifugal compressor and centrifugal pump. It bears a huge centrifugal force in the working state, and its safety and reliability is very important. Based on the finite element analysis theory of the strength vibration of a concentric turbine impeller and based on the theory of periodic cyclic symmetric impeller strength vibration, a numerical model of cyclic symmetry of a concentric turbine impeller is established, and its deformation under the condition of working speed is analyzed. The calculation results show that the maximum equivalent stress of the concentric turbine impeller is 113 MPA, which is located near the inlet of the inner ring surface of the impeller body, which is far less than the yield limit of the material, indicating that the impeller meets the strength requirement. Furthermore, the calculation results are compared with those of the whole cycle model, which not only verifies the reliability of the calculation results of the periodic cyclic symmetric model, It is also shown that the calculation efficiency can be greatly improved by using the periodic symmetry model to analyze the strength and vibration of the runoff impeller under the premise of ensuring the calculation accuracy.
【作者单位】： 海军驻大连426厂军代表室;
【分类号】：TH113.1
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