汽轮机轮盘质量及位置对转子临界转速影响试验研究

发布时间：2018-06-04 21:25

本文选题：临界转速 + 试验研究　；参考：《汽轮机技术》2017年05期

【摘要】：汽轮发电机组在临界转速时转子的振幅急剧增大,造成动静之间碰摩,给机组带来一定的危害。转子临界转速的计算方法多种,但是往往计算结果与实际误差较大。通过伯德图法、频谱分析法和李莎茹图法进行转子临界转速测量,实验结果显示3种方法所测结果基本一致,并确定选取伯德图法测量转子临界转速较为准确;通过改变转子上轮盘的质量和位置变化,利用伯德图进行转子临界转速测量,得出随着质量的增大转子临界转速会减小,在偏离转子中心位置较远处影响不大;相同质量情况下,轮盘偏离转子中心越远,转子临界转速增加得越快。该试验结论可指导工程实践,对现场临界转速的计算、仿真和实验起到一定的借鉴作用。
[Abstract]:The amplitude of the rotor increases sharply at the critical speed of the turbine-generator unit, which results in rub-impact between the dynamic and static, and brings certain harm to the unit. There are many methods to calculate the critical speed of the rotor. The critical speed of rotor is measured by Berdtu method, spectrum analysis method and Lisaru chart method. The experimental results show that the results of the three methods are basically the same, and it is determined that the Birdchart method is more accurate to measure the critical speed of the rotor. By changing the mass and position of the wheel on the rotor, the critical speed of the rotor is measured with the Byrd diagram. It is concluded that the critical speed of the rotor will decrease with the increase of mass, and the influence of the distance from the center of the rotor is not significant. At the same mass, the farther the wheel deviates from the center of the rotor, the faster the critical speed of the rotor increases. The experimental results can guide engineering practice and can be used for reference in the calculation, simulation and experiment of the critical speed in the field.
【作者单位】：沈阳工程学院能源与动力学院;中国国电科学技术研究院;
【分类号】：TM621

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