受油器故障激励下转子—轴承—转轮系统稳定性研究  

Research on Rotor-Bearing-Runner System Stability Under Faulty Oil Receiver

作　　者：武菁 张雷克[1] 王雪妮[1] WU Jing;ZHANG Lei-ke;WANG Xue-ni(College of Hydro Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学水利科学与工程学院,山西太原030024

出　　处：《水电能源科学》2023年第1期172-175,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51709196)。

摘　　要：灯泡贯流式机组旋转部件与固定部件碰摩故障将极大影响机组的安全稳定运行。针对含故障受油器部件的灯泡贯流式机组轴系碰摩系统,建立了多振源激励下含故障受油器灯泡贯流式机组转子—转轮弯扭耦合振动模型及其运动微分方程。利用Floquet理论讨论了系统周期解稳定性。结果表明,故障受油器的出现从加剧系统失稳可能及更迭稳态与非稳态频次切换层面显著改变了系统动态特性,加剧了系统非稳态运行范围,需引起足够重视。研究结果可为灯泡贯流式机组安全运行及稳定性分析提供借鉴。Malfunctions resulting from rub-impact between moving and stationary parts of bulb tubular unit will jeopardize the safety and stability of hydropower units. Aiming at the bulb tubular unit shaft rubbing system, a coupled bending-torsional rotor-runner system with faulty oil receiver under multi-vibration source and corresponding differential equation were established. The Floquet theory was applied to investigate the stability of periodic solution. The results reveal that when faulty oil receiver is taken into account, the system dynamic feature alters dramatically, which aggravates the possibility of system instability and alternates frequency transition between steady and non-steady state. This fault aggravates the unsteady vibration characteristics of different rotating parts, especially for the runner structure response trend, which needs to be paid enough attention. The results can provide useful references for safe operation and stability analysis of bulb tubular units.

关 键 词：受油器 弯扭耦合 灯泡贯流式机组 稳定性分析 

分 类 号：TV734[水利工程—水利水电工程]