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大型汽轮机组安全运行十分重要,保持汽轮机动静部分有合理间隙则是确保安全运行的一个重要环节。差胀指示器是为监督动静间隙变化而设置的一种保安装置。用有限元法分析东方汽轮机厂300MW汽轮机高中压转子和低压转子,我们得到了转子系统中各点的应力、应变和位移分布情况,从中也得到了差胀指示器突跳现象的物理解释并导出了计算公式。一、差胀指示器突跳现象的描述大型汽轮机组差胀指示器的数值发生较大变化不仅出现在甩负荷时,就是在测量机组的惰走曲线时这种现象也会出现。不过,前一种
The safe operation of large steam turbines is very important. To maintain a reasonable clearance between the static and dynamic parts of the steam turbine is an important part of ensuring safe operation. Differential expansion indicator is to monitor the gap between the movement and set a security device. Finite element method is used to analyze the distribution of stress, strain and displacement at each point of the rotor system of the 300 MW steam turbine high and medium pressure rotors and the low pressure rotors of Dongfang Steam Turbine Works. The physical explanation of the sudden jump of the differential expansion indicator is obtained and derived The calculation formula. First, the description of the phenomenon of sudden expansion indicator sudden jump Large expansion turbine indicator of large changes in the value of not only occurs when the load rejection, that is, when measuring the inertia of the curve unit this phenomenon will occur. However, the first one