大型水电机组动平衡试验研究  

Dynamic balance tests of large hydropower unit

作　　者：张海库 陈启卷[1] 耿清华 郑阳[1] 王卫玉 ZHANG Haiku;CHEN Qijuan;GENG Qinghua;ZHENG Yang;WANG Weiyu(School of Power and Mechanical Engineering,Wuhan University,Wuhan 430072,China;Datang Hydropower Science&Technology Research Institute Co.,Ltd.,Chengdu 610074,China;College of Water Resource&Hydropower,Sichuan University,Chengdu 610065,China)

机构地区：[1]武汉大学动力与机械学院,武汉430072 [2]大唐水电科学技术研究院有限公司,成都610074 [3]四川大学水利水电学院,成都610065

出　　处：《振动与冲击》2021年第11期124-127,153,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(51379160);西华大学流体及动力机械教育部重点实验室开放性基金(szjj2013-001);大唐集团公司科研项目。

摘　　要：针对大型水电机组转子质量不平衡引起的振动问题,提出了一种基于动载荷平衡建立离心力方程的分析处理方法。该方法利用大量现场试验样本数据,采用回归分析法对传统经验试配重公式进行了修正,得到了精确的回归系数,确定试配重质量;加试配重块,通过试配重前后变转速试验测试结果对比,找出不同转速下振动相同的平衡点,建立离心力方程;通过对离心力方程的计算求解,得到总的动不平衡质量。以某水电机组为例,对提出方法的有效性进行试验验证。结果表明,与传统方法相比,该研究提出的方法能快速和有效处理动平衡问题。Aiming at the vibration problem caused by rotor mass unbalance of large hydropower unit,a method for analysis and processing based on dynamic load balance to establish centrifugal force equation was proposed.Firstly,a large number of field test sample data and the regression analysis method were used to modify the traditional empirical trial counterweight formula,obtain the accurate regression coefficient and determine the trial counterweight’s mass.Then,the trial counterweight was added on the rotor,the varying rotating speed measuring results before and after adding the trial counterweight were compared to find balance points of the same vibration under different rotating speeds,and establish the centrifugal force equation.Finally,the centrifugal force equation was solved to obtain the total dynamic unbalance mass.Taking a certain hydropower unit as an example,the effectiveness of the proposed method was verified with tests.The results showed that compared with the traditional method,the proposed method can deal with the dynamic balance problem quickly and effectively.

关 键 词：动平衡 水轮机组 动载荷平衡 离心力方程 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3