噪声与振动控制2024，Vol.44Issue(3)：88-94,7.DOI:10.3969/j.issn.1006-1355.2024.03.014
倾斜偏心对同步发电机转子力学特性的影响
Impact of Inclined Eccentricity on Rotor Mechanical Characteristics of Synchronous Generators
摘要
Abstract
Air gap eccentricity is a common mechanical fault in generators.Previous researches are mainly focused on the influence of normal and uniform eccentricity of axial air gap on the loading and vibration characteristic of rotors.However,rare of studies have considered the axial air gap of non-uniform eccentricity,i.e.rotor inclination eccentricity.As a supplement,this paper comprehensively analysis the effect of the degree of failure difference on rotor mechanical characteristic in synchronous generators under rotor inclination eccentricity.The rotor mechanical characteristics include rotor unbalanced magnetic pull excitation characteristics and vibration characteristics.The theoretical analysis,finite element analysis calculation and experimental verification are performed respectively for a 5 kVA double-pole fault simulated generator.It is shown that the rotor unbalanced magnetic pull is zero in normal conditions,the rotor vibration has small amplitudes and the vibration frequency is dominated by the conventional fundamental frequency and some other even-order secondary harmonics transmitted from the stator.After rotor inclination eccentricity occurs,the unbalanced magnetic pull/vibration of the rotor is dominated by the second-order harmonic.With the increase of eccentricity degree,the second-order harmonic amplitude of the unbalanced magnetic pull/vibration of the rotor will increase.In addition,the rotor unbalance magnetic pull is non-uniformly distributed along the axial direction,the smaller the air gap is,the greater the rotor unbalanced magnetic pull is.关键词
振动与波/同步发电机/转子倾斜偏心/不平衡磁拉力/转子振动/力学特性Key words
vibration and wave/synchronous generator/rotor inclination eccentricity/unbalanced magnetic pull/rotor vibration/mechanical characteristics分类
信息技术与安全科学引用本文复制引用
何玉灵,徐明星,代德瑞,郑文杰,李勇,唐贵基..倾斜偏心对同步发电机转子力学特性的影响[J].噪声与振动控制,2024,44(3):88-94,7.基金项目
国家自然科学基金资助项目(52177042) （52177042）
河北省自然科学基金资助项目(E2020502031) （E2020502031）
中央高校基 本 科 研 业 务 费 专 项 基 金 资 助 项 目(2020MS114) （2020MS114）
河北省第三批青年拔尖人才支持计划资助项目([2018]-27) （[2018]-27）
河北省研究生创新能力培养资助项目(CXZZBS2023149) （CXZZBS2023149）
苏州市社会发展科技创新资助项目(SS202134) （SS202134）
