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叶轮是汽轮机和燃气轮机的重要另件。正确设计叶轮,避免叶轮在运行中发生事故是十分重要的。随着近代汽轮机和燃气轮机向高参数大容量方向发展,着重研究叶轮的应力分析,设计规范和强度的安全判定准则是汽轮机和燃气轮机结构设计的重要任务。过去常用的判定准则,是在弹性理论的基础上制定的。它以计算的最大主应力和材料简单拉伸的强度指标σs(屈服极限),σ_b(抗拉强度)相比较来规范。即安全系数=(σs/σ计)取1.7～2.0。这种判定准则没有全面地反映材料破坏的强度理论,没有概括
Impellers are important components of steam turbines and gas turbines. Correct design of the impeller to avoid impeller accident in operation is very important. With the development of modern steam turbine and gas turbine to high-capacity and large-capacity, it is an important task to study the stress analysis, design criterion and strength of impeller in the structural design of steam turbine and gas turbine. The criteria used in the past are based on the theory of flexibility. It is compared with the calculated maximum principal stress σs (yield limit) and σ_b (tensile strength) of the material simply drawn. The safety factor = (σs / σ meter) to take 1.7 ~ 2.0. This criterion does not fully reflect the strength of the material damage theory, did not summarize