| 大型非线性转子-密封-轴承系统的不平衡响应与稳定性 |
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| 引用本文： | 崔颖,刘占生,叶建槐. 大型非线性转子-密封-轴承系统的不平衡响应与稳定性[J]. 振动与冲击, 2011, 30(5): 205-207. DOI: |
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| 作者姓名： | 崔颖 刘占生 叶建槐 |
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| 作者单位： | 哈尔滨工业大学 能源科学与工程学院，黑龙江，哈尔滨，150001 |
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| 基金项目： | 国家自然科学基金重点项目 |
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| 摘 要： | 对实际大型汽轮机转子-密封-轴承系统建立了具有超大规模维数的非线性动力学模型,该模型考虑了密封的非线性激振力、可倾瓦轴承的弹性支承力、转子的阻尼力、不平衡质量力和重力.采用Newmark方法对其进行数值求解,模拟出转子升速过程中汽流激振现象的典型特征和发生汽流激振的失稳转速,并且得到系统参数对转子不平衡响应和稳定性的影响规律.结果表明:适当的增大转子的阻尼、密封的半径间隙和密封流体轴向流速可提高转子发生汽流激振的失稳转速,这为在设计和运行中提高实际大型汽轮机转子-密封-轴承系统的稳定性提供了参考依据.
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| 关 键 词： | 转子-密封-轴承系统 非线性 高维 不平衡响应 失稳转速 |
| 收稿时间： | 2009-12-21 |
| 修稿时间： | 2010-03-17 |
Dynamic response and stability of a large scale nonlinear rotor-seal-bearing system |
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| CUI Ying,LIU Zhan-sheng,YE Jian-huai. Dynamic response and stability of a large scale nonlinear rotor-seal-bearing system[J]. Journal of Vibration and Shock, 2011, 30(5): 205-207. DOI: |
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| Authors: | CUI Ying LIU Zhan-sheng YE Jian-huai |
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| Affiliation: | School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001 |
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| Abstract: | Nonlinear dynamic model of a rotor-seal-bearing system with ultra-large-scale dimension for an actual steam turbine was proposed considering the non-linear exciting force of seal,the elastic support force of tilting-pad bearing,the damping force,the imbalance force and the gravity of rotor.The unbalance response of the rotor was numerically calculated with Newmark method.The typical characteristic of self-excited vibration and the threshold speed of instability induced by the seal-force were revealed.The ef... |
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| Keywords: | rotor-seal-bearing system nonlinear high-dimensional unbalance response threshold speed of instability |
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