抽水蓄能机组锻件磁轭材料选择及应用

Selection and Application of Magnetic Yoke Materials for Pumped Storage Unit Forgings

随着抽水蓄能电站建设和技术快速发展,机组水头和转速不断提高,对发电电动机转动部件的材料选择要求也越来越严格。转子磁轭作为发电电动机的核心部件,是发电机磁路的重要组成部分,同时承担着机组高速旋转产生的离心力和磁极拉力,其材料选择至关重要。经系统论证研究和实践应用证明,锻件磁轭材料作为一种新型材料在机械性能、焊接性能、应力校核、通风效果、导磁性能、制造工艺、现场安装等有明显优势,可替代传统磁轭材料并成功应用于大型抽水蓄能机组,满足机组长期安全稳定运行要求,且锻件磁轭其整体性和刚性较优。对锻件磁轭材料和钢板磁轭材料的选择应用进行对比分析,为抽水蓄能发电电动机转子磁轭材料深入研究和实际应用提供技术支撑。

With the rapid development of the construction and technology of Pumped-storage hydroelectricity,the head and speed of the unit are continuously improved,and the requirements for the material selection of the rotating parts of the generator motor are also increasingly strict.As the core component of a generator motor,the rotor yoke is an important component of the generator magnetic circuit,and also bears the centrifugal force and magnetic pole tension generated by the high-speed rotation of the unit.The material selection is crucial.Through systematic research and practice,it has been proven that forging magnetic yoke materials have obvious advantages in mechanical performance,welding performance,stress verification,ventilation effect,magnetic conductivity,manufacturing process,on-site installation,etc.They can replace traditional magnetic yoke materials and have been successfully applied to large pumped storage units,meeting the long-term safety and stable operation requirements of the units.Moreover,the integrity and rigidity of forging magnetic yoke materials are better than traditional laminated magnetic yokes and annular thick steel plate magnetic yokes.This article focuses on summarizing and analyzing the selection and application of magnetic yoke materials for ring forgings,providing technical support for in-depth research and practical application of magnetic yoke materials for pumped storage electric motors.