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首页> 外文期刊>Mechanical systems and signal processing >Stability and sensitivity analysis of the bending-torsional coupled vibration with the arcuate whirl of hydro-turbine generator unit
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Stability and sensitivity analysis of the bending-torsional coupled vibration with the arcuate whirl of hydro-turbine generator unit

机译：水轮发电机单元弧形旋转弯曲耦合振动的稳定性及敏感性分析

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摘要

The vibrational stability and the shafting vibration sensitivity to some parameters of the unbalanced rotor bending-torsional coupling vibration of the hydro-turbine generator unit (HTCU) with the arcuate whirl were investigated in this study. First, a novel mathematical model of the unbalanced rotor bending-torsional coupling vibration considering the arcuate whirl of the shafting for the HTGU was proposed. Second, the vibrational stability of the shafting was studied using the phase trajectory, Poincare map, and frequency spectrum. Third, the shafting vibration sensitivity to some parameters was observed using the parameter bifurcation diagrams. Some shafting vibration phenomena were investigated by comparing the dynamic characteristics of three models, and the phenomena showed that the vibration amplitude of the hydro-turbine runner and generator increased, the torsional vibration angle of the spindle decreased, the generator vibration and the torsional vibration of the spindle sensitivity range to the hydro-turbine runner mass eccentricity changed, and the angular speed that mutates the dynamic vibration characteristic of the HTGU decreased when considering the arcuate whirl. The shafting vibration became stable, but the hydro-turbine runner vibration sensitivity range to the generator mass eccentricity and the generator vibration sensitivity range to the hydro-turbine runner mass eccentricity changed when considering the torsional vibration of the spindle. The vibrations of the generator and hydro-turbine runner are sensitive to the torsional damping coefficient in some ranges, the vibrations of the hydro-turbine runner and the spindle are sensitive to the generator mass eccentricity in some ranges, and the vibrations of the generator and the spindle are sensitive to the hydro-turbine runner mass eccentricity in some ranges.
机译：在本研究中研究了振动稳定性和对某些参数的施加稳定性和施工振动振动与弧形旋转旋转耦合振动的一些参数，在该研究中研究了弧形旋转的旋转耦合振动。首先，提出了考虑到HTGU的轴切轴承弧形旋转耦合振动的不平衡转子弯曲耦合振动的新颖数学模型。其次，使用相位轨迹，庞的地图和频谱研究了备件的振动稳定性。第三，使用参数分叉图观察到一些参数的轴系振动敏感性。通过比较三种模型的动态特性来研究一些轴系振动现象，并且该现象表明水轮机流道和发电机的振动幅度增加，主轴的扭转振动角度降低，发电机振动和扭转振动主轴灵敏度范围改变了水轮机转换器质量偏心，并且在考虑弧形旋转时突变HTGU的动态振动特性的角速度。朝切振动变得稳定，但是当考虑主轴的扭转振动时，水轮机转速器振动灵敏度范围与发电机质量偏心和发电机振动灵敏度范围变为水轮机转换器质量偏心。发电机和水轮机转换器的振动对一些范围内的扭转阻尼系数敏感，水轮机流道的振动和主轴对一些范围内的发电机质量偏心敏感，以及发电机的振动和发电机的振动主轴对某些范围内的水轮机转轮质量偏心敏感。

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  • 来源
    《Mechanical systems and signal processing》 |2021年第2期|107306.1-107306.20|共20页
  • 作者

    Yousong Shi; Jianzhong Zhou; Xinjie Lai; Yanhe Xu; Wencheng Guo; Baonan Liu;

  • 作者单位

    School of Hydropower and Digital Engineering Hua Zhong University of Science and Technology Wuhan 430074 China;

    School of Hydropower and Digital Engineering Hua Zhong University of Science and Technology Wuhan 430074 China;

    School of Hydropower and Digital Engineering Hua Zhong University of Science and Technology Wuhan 430074 China;

    School of Hydropower and Digital Engineering Hua Zhong University of Science and Technology Wuhan 430074 China;

    School of Hydropower and Digital Engineering Hua Zhong University of Science and Technology Wuhan 430074 China;

    School of Hydropower and Digital Engineering Hua Zhong University of Science and Technology Wuhan 430074 China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Arcuate whirl; Hydro-turbine generator unit; Shafting vibration; Stability; Sensitivity;

    机译：arcate旋转;水轮发电机单元;皱折的振动;稳定;灵敏度;

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