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本文首先采用有限元数值解法对国产100MW汽轮机高压转子在不稳态工况下的温度场及应力场进行了计算与分析,并针对北京石景山发电厂高井电站3号机——51-100-2型汽轮机组自投运以来,各种启停及负荷变动工况所产生的疲劳寿命损耗进行了数理统计,提出了估算老机组寿命消耗的方法,从而为国产100MW机组参与电网调峰运行的安全性及可靠性提供了理论依据。有限元分析分为三个步骤:首先对整根高压转子进行了不稳定工况下的热应力分析;然后取出温度变化较为剧烈的高压前几级和前轴封段进行计算;最后对弹性槽部位进行了详细
In this paper, the finite element method is used to calculate and analyze the temperature field and stress field of the high-pressured rotor of a domestic 100 MW steam turbine under unsteady conditions. According to the calculation of the temperature field and the stress field of the high- Type steam turbines since the commissioning, various start-stop and load changes in the fatigue life conditions caused by mathematical statistics, the proposed method of estimating the life of the old unit consumption, so as to domestic 100MW units participate in the peak load operation of the power grid safety Sex and reliability provide a theoretical basis. The finite element analysis is divided into three steps: First, the entire high-pressure rotor under unstable conditions of thermal stress analysis; and then remove the more intense temperature changes in the first few stages of high pressure and the front seal section; Finally, the elastic groove The site was detailed