排灌机械工程学报2011，Vol.29Issue(5)：423-426,431,5.DOI:10.3969/j.issn.1674-8530.2011.05.011
水轮发电机组主轴系统的水流激励特性
Hydraulic excitation exerting on main shaft system of hydraulic turbine-generator units
摘要
Abstract
By the finite element methods (FEM) , the global coupling dynamic model of the main shaft system of a Francis turbine-generator unit is established, which includes electromagnetic parameters, structural parameters and fluid parameters. Based on the existence of transverse vibration and torsional vibration of the turbine shaft system, the hydraulic excitation exerting on the main shaft system, which is translated by the blades,is derived. According to the dynamic equations of the main shaft system,the internal relations between the hydraulic excitation and the vibration characteristics of the main shaft system are discovered. The studies show that the hydraulic excitation can be transferred by the turbine blades as middle transform components to exert on the main shaft system, and that the hydraulic excitation is not only related to the complicated pressure fluctuation in turbine runner, but also to the structural parameters and the vibration of the main shaft system, and that the hydraulic excitation and the vibration of the main shaft affect with each other. The fluid-solid coupling vibration of the main shaft system of the Francis turbine-generator unit may take place subjected to the hydraulic excitation. An example is presented at last.关键词
水轮机/主轴系统/水流激励/流固耦合/动态特性Key words
hydraulic turbine/main shaft/hydraulic excitation/fluid-solid coupling/dynamic characteristics分类
农业科技引用本文复制引用
李兆军,杨旭娟,蔡敢为,任立昭..水轮发电机组主轴系统的水流激励特性[J].排灌机械工程学报,2011,29(5):423-426,431,5.基金项目
国家自然科学基金资助项目(51065002) （51065002）
广西自然科学基金资助项日(桂科自0991055) （桂科自0991055）
