900MW汽轮发电机组轴系扭振的研究

Study on torsional vibration in shaft system of 900 MW turbine generators

主要研究了上海外高桥电厂二期工程中的 2台 90 0 MW汽轮发电机组的轴系扭振及疲劳寿命损耗。轴系扭振模型采用集中参数等值模型 ,整个轴系分为 6段。计算结果表明 ,机组扭振频率避开了工频与倍频 ,轴系不会因共振而破坏。

The torsional vibration and fatigue life consumption in shaft system of two 900 MW turbine generators of phase Ⅱ project of Shanghai Wai Gaoqiao Power Plant were studied. Lumped parameter equivalent model is adopted in the shaft system torsional vibration model and the whole shaft system are divided into 6 parts. The calculation result indicates that the torsional vibration frequency will avoid from power frequency and multiple frequency. The shaft system will not be demaged by resonance vibration and the torsional vibration in shaft system are safe during short circuit fault.