【摘要】 对某电厂50MW汽轮机转子裂纹车削前后不同运行条件下的温度场、热应力场和机械应力进行了有限元分析计算,计算分析结果表明裂纹位于转子最大应力发生处;裂纹部位的弹性槽车削后,转子最大应力有所降低;弹性槽尺寸的变化对应力集中系数有很大的影响。计算结果对转子裂纹车削加工方案以及安全性评定提供了技术数据。更多还原

【Abstract】 The temperature field, thermal stress field, and mechanical stress under different operating conditions before and after crack[CD*2-ing of the rotor for 50 MW steam turbine in one power plant have been calculated through the finite element analysis. The results of calculation show that the crack to be situated at location of max. stress occurred on the rotor. After turning, the elastic slot at the crack position makes the max. stress on the rotor to be lowered, the size of elastic slot affects greatly the factor of stress concentration. The results of calculation provide technical data for rotor’s crack-turning fabricating scheme and for safety assessment.更多还原