| 唐拥军,樊玉林.张河湾抽蓄电站3号机组异常振动分析与处理[J].中国水利水电科学研究院学报,2020,18(2):155-160 |
| 张河湾抽蓄电站3号机组异常振动分析与处理 |
| Analysis and treatment on abnormal vibration of 3# unit of Zhanghewan pumped storage hydropower plant |
| 投稿时间：2018-05-13 |
| DOI：10.13244/j.cnki.jiwhr.2020.02.011 |
| 中文关键词: 异常振动 噪声 短时傅里叶变换 卡门涡 转轮叶片 |
| 英文关键词:abnormal vibration noise short-time fourier transform karman vortex runner blade |
| 基金项目:国家电网公司科技项目（525730190006） |
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| 中文摘要: |
| 张河湾抽水蓄能电站3号机组在更换水泵水轮机转轮后，进行了一系列的调试试验。在准备甩75%负荷试验的升负荷过程中出现了异常的振动现象，异常振动主要频率成分为202 Hz和196.5 Hz。通过对压力脉动和顶盖振动在时域、频域及时频联合分析后，得出异常振动是转轮叶片出水边的卡门涡频率与转轮固有频率相接近而引发的水力共振现象。后来对叶片出水边进行了修型处理，处理后卡门涡诱发的共振现象消失。 |
| 英文摘要: |
| A series of debug tests were conducted on unit 3# of Zhanghewan pumped storage hydropower plant after its pump-turbine runner was replaced with a new one. Abnormal vibration happened in the process of load going up with 75% rated load reject test, and the main frequencies of abnormal vibration was 201Hz and 196.5Hz. After a detailed analysis on pressure pulsation and headcover vibration was conducted in time domain, frequency domain and time-frequency analysis, it was found that a resonance vibration happened because the frequencies of Karman vortex at runner blade outer edge was close to the natural frequencies of runner. Later on, the Karman vortex resonance disappeared after some treatment on the outer edge of runner blade. |
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