沙沱水电站机组振动特性研究  

On the Vibration Characteristics of the Hydro-turbine Units in Shatuo Hydropower Station

作　　者：熊必文 王渊博 许海洋 宫傲 闫文峰 刘成杰 XIONG Biwen;WANG Yuanbo;XU Haiyang;GONG Ao;YAN Wenfeng;LIU Chengjie(Shatuo Hydropower Plant,Guizhou Wujiang Hydropower Development Co.,Ltd.,Yanhe 565300,China;Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou 310000,China;State Key Laboratory of Hydro-Power Equipment,Harbin 150040,China)

机构地区：[1]贵州乌江水电开发有限责任公司沙沱发电厂,贵州沿河565300 [2]华电电力科学研究院有限公司,浙江杭州310000 [3]水力发电设备国家重点实验室,黑龙江哈尔滨150040

出　　处：《水电与新能源》2024年第6期8-11,43,共5页Hydropower and New Energy

摘　　要：沙沱水电站投产后,存在振动区宽、稳定运行区偏窄的问题。以沙沱电站水轮机为研究对象,开展数值模拟计算,分析了沙沱电站机组蜗壳进口、无叶区、尾水管处等部位的压力脉动。计算结果表明,蜗壳进口主要为低频脉动;无叶区的压力脉动呈现明显的动静干涉现象,同时伴有低频的频率出现;尾水管主要由尾水管涡带引起的不同程度的低频脉动。研究成果为机组的防减振措施探索奠定了基础。After the operation of Shatuo Hydropower Station,wide vibration zone and narrow stable operation zone problems are observed.Thus,numerical simulation studies are carried out on the hydro-turbine units.The pressure pulsation at the volute inlet,the bladeless area,and the draft tube is analyzed.The results show that the volute inlet is mainly of low frequency pulsation.The pressure pulsation in the bladeless area exhibits obvious dynamic-static interference phenomena,accompanied by low frequencies.The draft tube is mainly affected by low frequency pulsation caused by the tail water vortex bands.The results provide useful basis for the exploration of vibration alleviation measures for the units.

关 键 词：水轮机 振动 压力脉动 

分 类 号：TM312[电气工程—电机]