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首页> 外文会议>ASME Power Conference 2005: Includes Papers from the 2005 International Conference on Power Engineering(ICOPE) pt.A >CASE HISTORY: GENERATOR ROTOR SHORTED TURN INDUCED VIBRATION EXCURSION
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CASE HISTORY: GENERATOR ROTOR SHORTED TURN INDUCED VIBRATION EXCURSION

机译：案例历史：发电机转子偏斜引起的振动偏移

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摘要

The diagnosis of a generator rotor vibration in a 1,000 MW nuclear plant unit is presented. Several vibration excursions were recorded between July and August 2002. The excursions were somewhat repetitive in shape, but erratic and presented a clearly worsening trend, which threatened the continuous operation of the unit. In addition to high bearing vibration levels, the vibration force was transmitted to the Generator's Current Transformers showing vibration levels in excess of 18 mils. The diagnosis of the rotor vibration excursions was simultaneously conducted by the Original Equipment Manufacturer (OEM) and a third party. An existing rubbing condition in the exciter and the generator hydrogen seals is presumed to have contributed to the elevated vibration levels reached during the excursion. A flat orbit in the generator side of the low pressure rotor LP-C was also recorded during the investigation. The existing rubbing condition caused discrepancy in the diagnostic between both parties. The OEM attributed the excursions to that rubbing condition while the third party attributed it to Generator Rotor Shorted Turns. Later inspection of the generator rotor revealed that the second diagnostic was correct. The characteristics of the vibration condition, the trouble shooting approach and the solution are described in this article.
机译：提出了对1,000 MW核电站机组中发电机转子振动的诊断方法。在2002年7月至2002年8月之间记录了几次振动偏移。这些偏移在形状上有些重复，但不稳定，呈现明显恶化的趋势，这威胁到设备的连续运行。除了较高的轴承振动等级外，振动力还传递到发电机的电流互感器，其振动等级超过18密耳。原始设备制造商（OEM）和第三方同时进行了转子振动偏移的诊断。假定激振器和发电机氢密封件之间存在摩擦，这会导致漂移过程中达到较高的振动水平。在研究期间还记录了低压转子LP-C发电机侧的平坦轨道。现有的摩擦条件导致双方之间的诊断存在差异。 OEM将偏移归因于该摩擦条件，而第三方则将其归因于发电机转子短路。后来检查了发电机转子，发现第二次诊断是正确的。本文介绍了振动条件的特征，解决问题的方法和解决方案。

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