基于MRD优化布置的水轮发电机组碰摩系统振动抑制

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (13) : 1-11.

论文

张雷克1，聂梁1，张金剑2,3，王雪妮1,4，马震岳2

作者信息 +

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

ZHANG Leike1, NIE Liang1, ZHANG Jinjian2,3, WANG Xueni1,4, MA Zhenyue2

Author information +

文章历史 +

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 Fluid 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s1与s2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。

Abstract

Aiming at the rotor-runner system with rubbing problem of hydro-generator set, the Magneto-Rheological Fluid Damper ( MRD ) is adopted to control the shaft vibration, in order to investigate the influence of MRD on vibration pattern of unit shaft system and corresponding effect on suppression of system rubbing faults. Firstly, the unit axial position function is introduced into MRD nonlinear dynamics model, and the dynamic model of MRD-rotor-runner system with axial distribution parameter under rubbing fault is established. Secondly, based on numerical simulation method, the nonlinear dynamic behavior of rotor-runner system with or without considering MRD is comparatively analyzed using unit speed as control parameter. Finally, the effects of different MRD axial arrangement parameters on the dynamic behavior of rubbing rotor-runner system are investigated. The results show that the addition of MRD has a good restraining effect on unsteady motion of rotor and runner, which can significantly reduce vibration amplitude of rotor and runner, and effectively avoid the occurrence of rubbing faults in unit shaft system. The vibration dampening effect of MRD on the system is the best when damping parameters s1 and s2 are taken to be 0.25 and 0.95, respectively. By reasonably arranging MRD in unit shaft system, the system vibration can be effectively improved, thus providing useful guidance for vibration control of hydro-generator set.

导出引用

张雷克1，聂梁1，张金剑2,3，王雪妮1,4，马震岳2. 基于MRD优化布置的水轮发电机组碰摩系统振动抑制[J]. 振动与冲击, 2024, 43(13): 1-11

ZHANG Leike1, NIE Liang1, ZHANG Jinjian2,3, WANG Xueni1,4, MA Zhenyue2. Vibration suppression of rubbing system in water turbine generator set based on MRD optimization arrangement[J]. Journal of Vibration and Shock, 2024, 43(13): 1-11

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