基于MRD优化布置的水轮发电机组碰摩系统振动抑制  

Vibration suppression of rubbing system in water turbine generator set based on MRD optimization arrangement

作　　者：张雷克[1] 聂梁 张金剑 王雪妮[1,4] 马震岳 ZHANG Leike;NIE Liang;ZHANG Jinjian;WANG Xueni;MA Zhenyue(College of Water Resources Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;School of Hydraulic Engineering,Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116023,China;State Key Lab of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300354,China;Henan Provincial Key Lab of Water Resources Conservation and Intensive Utilization in Yellow River Basin,Zhengzhou 450046,China)

机构地区：[1]太原理工大学水利科学与工程学院,太原030024 [2]大连理工大学建设工程学部水利工程学院,辽宁大连116023 [3]天津大学水利工程仿真与安全国家重点实验室,天津300354 [4]河南省黄河流域水资源节约集约利用重点实验室,郑州450046

出　　处：《振动与冲击》2024年第13期1-11,共11页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(52379091);山西省基础研究计划项目(202103021224086,202203021222112);河南省黄河流域水资源节约集约利用重点实验室开放研究基金项(HAKF202104)。

摘　　要：针对水轮发电机组转子-转轮系统碰摩故障问题,采用磁流变液阻尼器(magneto-rheological damper,MRD)对轴系振动进行抑制,旨在探究MRD对机组轴系振动的影响规律及其对系统碰摩故障的抑制效果。首先,将机组轴向位置函数引入MRD非线性动力学模型,推导了碰摩故障下含轴向分布参数的MRD-转子-转轮系统动力学方程。其次,基于数值模拟方法,以机组转速为控制参数对比分析了是否考虑MRD的转子-转轮系统非线性动力学行为。最后,研究了不同MRD轴向布置参数对碰摩转子-转轮系统动力学行为的影响。研究结果表明:MRD的加入对转子、转轮非稳态运动具有良好约束作用,能够显著减小转子、转轮振动幅值,有效避免了机组轴系碰摩故障的发生;当阻尼器位置参数s_(1)、s_(2)分别取0.25与0.95时,MRD对系统的减振效果最佳。通过在机组轴系合理布置MRD,可有效改善系统振动情况,从而为水轮发电机组振动控制提供有益指导。Here,aiming at the problem of rubbing faults in rotor-runner system of water turbine generator set,magneto-rheological damper(MRD)was used to suppress shafting vibration of the set,and explore effects of MRD on shafting vibration of the set and their suppression effect on the set’s rubbing faults.Firstly,the set’s axial position function was introduced into MRD nonlinear dynamic model,and dynamic equations of a MRD-rotor-runner system with axial distribution parameters under rubbing faults were derived.Secondly,based on numerical simulation methods,nonlinear dynamic behaviors of the rotor-runner system with MRD and that without MRD were analyzed contrastively taking the set’s rotating speed as the control parameter.Finally,effects of different axial arrangement parameters of MRD on dynamic behavior of the rubbing rotor-runner system were studied.The study results showed that MRD’s joining has a good constraint effect on unsteady state motion of rotor and runner,MRD can significantly reduce vibration amplitudes of rotor and runner,and effectively avoid occurrence of rubbing faults in the set shafting;when MRD position parameters s_(1) and s_(2) are taken as 0.25 and 0.95,respectively,MRD have the optimal vibration reduction effect on the set;by reasonably arranging MRD in the set’s shafting,vibration situation of the set can be effectively improved to provide useful guidance for vibration control of water-turbine generator units.

关 键 词：水轮发电机组 转子-转轮系统 碰摩 磁流变液阻尼器(MRD) 振动优化控制 

分 类 号：TV734[水利工程—水利水电工程] TH213[机械工程—机械制造及自动化]