混流式水轮机振动噪声测试分析及处理措施——以上犹江水电站为例  

Vibration and noise test on Francis units and treatment measures in Shangyoujiang Power Plant

作　　者：吴道平[1] 温钦钰 戴勇峰[2] WU Daoping;WEN Qinyu;DAI Yongfeng(Institute of Electric Power Research of Jiangxi Province,Nanchang 330006,China;College of Energy and Power,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]江西省电力科学研究院,江西南昌330006 [2]华中科技大学能源与动力学院,湖北武汉430074

出　　处：《人民长江》2020年第7期218-224,235,共8页Yangtze River

基　　金：国网江西省电力有限公司科技项目(521820180010)。

摘　　要：混流式水轮机在某些工况下会出现较大振动和噪声等问题,这些问题会对机组安全运行产生威胁。为了保障机组稳定运行,以上犹江水电站混流式水轮机组为试验对象,对该机组的振动、噪声和水压力脉动等情况进行了现场测试。试验结果表明:噪声是由补气引起的,机组振动主要是由涡带等低频压力脉动所引起,蝶阀室楼板及坝体的振动则是由动静干涉水力激振而引发的。依据试验数据及机组运行和结构特性,提出了振动噪声初步处理方案。试验结果及处理措施可为机组安全稳定运行提供保障和依据。Fancis turbines often have large vibration and noise problems during operation, threatening the safe operation of units. In order to solve the hidden dangers caused by vibration, taking Shangyoujiang power plant in Jiangxi Province as the test object, we tested the vibration, noise and water pressure pulsation of the unit in the field. According to the test results, it can be concluded that the noise is caused by the air admission, the vibration of the unit is mainly caused by low-frequency pressure fluctuations such as vortex belts, and the vibration of butterfly valve room floor and the dam body is caused by the hydraulic excitation of dynamic and static interference. Based on the test data and the operation and structural characteristics of the unit, a preliminary treatment plan for vibration and noise is proposed, providing guarantee and basis for the safe and stable operation of the unit.

关 键 词：水轮机振动 振动噪声 噪声测试 现场试验 压力脉动 混流式水轮机 上犹江水电站 

分 类 号：TV734.1[水利工程—水利水电工程]