| 330 MW空冷机组电动给水泵甩负荷过程中泵轮抱死原因分析 |
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| 引用本文： | 张伟江,濮霞,唐广通,南伟亮.330 MW空冷机组电动给水泵甩负荷过程中泵轮抱死原因分析[J].发电设备,2014,28(6):442-444. |
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| 作者姓名： | 张伟江 濮霞 唐广通 南伟亮 |
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| 作者单位： | 1. 河北省电力公司 电力科学研究院,石家庄,050021
2. 军械工程学院 车辆与电气工程系,石家庄,050003 |
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| 摘 要： | 针对某厂300 MW机组电动给水泵在机组甩负荷期间主泵入口压力升高后,出现汽蚀、断流造成泵轮抱死的现象进行了分析.结果表明：水泵转速快速降低过程中,泵水温度快速升高,造成泵轮与密封环的碰摩,产生的热量对泵水进一步加热,出口压力降低后泵水汽化.针对类似问题,提出了预防措施.
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| 关 键 词： | 空冷机组 给水泵 泵轮抱死 汽蚀 最小流量 碰摩 |
Analysis on Core Locking-up of Electric Feed Pump in Load Rejection Process of a 330 MW Air-cooling Unit |
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| Zhang Weijiang,Pu Xia,Tang Guangtong,Nan Weiliang.Analysis on Core Locking-up of Electric Feed Pump in Load Rejection Process of a 330 MW Air-cooling Unit[J].Power Equipment,2014,28(6):442-444. |
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| Authors: | Zhang Weijiang Pu Xia Tang Guangtong Nan Weiliang |
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| Affiliation: | Zhang Weijiang , Pu Xia , Tang Guangtong , Nan Weiliang(1 Electric Power Research Institute, Hebei Electric Power Corporation, Shijiazhuang 050021, China; 2. Department of Vehicle and Electrical Engineering, Ordnance Engineering College, Shijiazhuang 050003, China) |
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| Abstract: | An analysis was carried out on the core locking-up failure of electric feed water pump in a 300 MW unit due to cavitation and cut-off of water caused by pressure rise at pump inlet during load rejection process. Results show that during the fast reduction of water pump speed, the water temperature increases quickly, leading to rub-impact between the pump impeller and the seal ring, where the pump water is further heated, and subsequently gets vaporized with the drop of outlet pressure. Preventive measures are finally proposed for similar problems. |
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| Keywords: | air-cooling unit feed pump core locking-up cavitation minimum flow rub-impact |
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