现代水轮机发展的趋势是增大单机容量,提高水轮机各项工作参数,将转桨式水轮机推广到更高的水头。因而要求修订多种现行的设计标准和技术条件,要求重新考虑水轮机组振动的允许值问题。标准只确立与转速有关的振动允许值,而且也是根据汽轮机运行经验,并没有考虑水轮机组工作过程的特点。过去对水轮机振动理论很少研究。水轮机组振动的水力原因主要是和蜗壳引水不均匀及绕流水轮机部件时产生涡流而引起的水流干扰有关。此时干扰频率被看作是水轮机转速(即转速、叶、 The trend of modern turbine development is to increase the stand-alone capacity, improve the turbine operating parameters, the paddle-type turbine to a higher head. As a result, a number of current design standards and technical conditions were requested to be revised to require reconsideration of the allowable value of turbine vibration. The standard only establishes the allowable value of the vibration related to the rotational speed, but also does not consider the characteristics of the turbine working process according to the operation experience of the steam turbine. In the past few studies on turbine vibration theory. The hydraulic causes of water turbine vibration are mainly related to the water flow disturbance caused by the non-uniform flow in the volute and the eddy current generated when turbine components are flowing around. At this point the interference frequency is seen as turbine speed (ie, speed, leaves,