山东电力技术2025，Vol.52Issue(6)：86-94,9.DOI:10.20097/j.cnki.issn1007-9904.2025.06.009
碰摩诱发大型同步调相机转子低频振动故障机理研究
Study on Mechanism of Low Frequency Vibration Fault of Large Synchronous Condenser Rotor Induced by Rubbing
摘要
Abstract
Sub-synchronous low-frequency vibration causing rotor dynamic instability is a major vibration fault in rotating machinery.General experience suggests that the low-frequency vibrations of sub-synchronously unstable rotors are mainly caused by bearing instability(film whirl and oil film oscillation)and airflow excitation.This paper conducts a modeling analysis of the low-frequency vibration fault occurring in large synchronous condensers due to sub-synchronous instability.The Riccati transfer matrix method is applied to calculate the natural frequencies and stability of the condenser rotor.Subsequently,numerical simulations based on Hertz's contact theory are performed to analyze the vibration response waveforms and spectra of the condenser rotor under contact conditions.This study investigates the mechanism and fault characteristics of rotor sub-synchronous low-frequency vibration faults induced by contact and non-contact interactions,eliminating the commonly held belief regarding the instability fault of the condenser bearings.Additionally,it corrects the traditional understanding that contact mainly leads to rotor operating frequency vibrations,confirming that contact interactions are the primary cause of low-frequency vibrations in condensers.The findings guide on-site repairs to eliminate contact faults,allowing the condenser to return to normal operation.This deepens the understanding of sub-synchronous low-frequency vibration faults in condensers and provides useful references for vibration management in equipment.关键词
调相机/低频振动/转子失稳/动静碰摩Key words
condenser/low frequency vibration/rotor instability/dynamic and static rubbing分类
动力与电气工程引用本文复制引用
汪海洋,刘晓锋,刘一丹,何小锋,蔡丹..碰摩诱发大型同步调相机转子低频振动故障机理研究[J].山东电力技术,2025,52(6):86-94,9.基金项目
国家电网有限公司科技项目"调相机组高可靠性非电量保护关键技术研究及应用"(5500-202316163A-1-1-ZN). Science and Technology Project of State Grid Corporation of China"Research and Application of Key Technologies for High-Reliability Non-Electrical Quantity Protection in Phase-Shifting Units"(5500-202316163A-1-1-ZN). （5500-202316163A-1-1-ZN）
