汽轮机主轴和转子锻件热稳定性分析方法研究

Hot-stability Analysis Method for Rotor Forging and Principal Spindle of Steam Turbine

提出一种新的汽轮机主轴和转子锻件热稳定性实验数据处理与分析方法,其首先利用相位校正2RC数据滤波技术来抑制转子测试带表面异物、表面粗糙特性以及环境振动等因素对测试带径向变化测量结果的干扰,然后利用最小二乘法分析技术准确地确定热变形挠度大小及其方向,以期改善现有锻件热稳定性分析方法的分析处理精度。分析及实验表明:利用数字滤波技术和最小二乘法挠度分析技术等可显著改善汽轮机主轴和转子锻件热稳定性试验的测量和处理精度,其为汽轮机主轴和转子锻件热稳定性测试与分析提供一种新的原理方法。

A new method is proposed to analyze and process the hot-stability for rotor forging and principal spindle of steam turbine. The method uses 2RC phase-correction data-filtering technology to suppress the bad effect on radius variation measurements resulted by the foreign body and coarseness property of the rotor surface, and circumstance vibration. And then, it uses the least square method to determine the value and direction of the hot distortion deflection, thereby improving the process accuracy of the existing hot-stability analysis method for forging. The analyses and experiments indicate that the use of digital filtering technology and the least square method deflection analyses method can obviously improve the measurement and process accuracy of hot-stability for rotor forging and principal spindle of steam turbine and it can provide a new method for the hot-stability measurement of rotor forging and principal spindle of steam turbine.