高速滚动轴承-转子系统的摩擦阻尼减振 |
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作者姓名: | 王黎钦 李文忠 古乐 郑德志 |
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作者单位: | 哈尔滨工业大学机电工程学院,哈尔滨150001 |
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基金项目: | 国家自然科学基金;黑龙江省哈尔滨市科技攻关计划 |
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摘 要: | 为了抑制高速滚动轴承-转子系统在通过临界转速时的过大振动,本文采用了摩擦阻尼弹性支承结构.分析了该支承的减振机理和支承特性,设计了摩擦阻尼器,研究了其对转子系统不平衡响应的影响.结果表明,采用适当的机械结构,阻尼器的刚度因子和摩阻因子只与内环的锥角和接触面摩擦因数有关.通过改变这两个参数和外壳轴向刚度,可改变其刚度和阻尼特性.在转子系统支承中引入摩擦阻尼器能够降低支承刚度,从而降低系统的临界转速,避开工作转速.此外,还可增大支承阻尼,抑制临界振幅,减小系统的振动外传力.
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关 键 词: | 高速转子系统 滚动轴承 摩擦阻尼 减振 临界转速 high-speed rotor system rolling-element bearing friction-damping vibration reduction critical speed 高速滚动轴承 转子系统 摩擦 阻尼减振 ROTOR SYSTEM forces suppress resonant response decreasing avoid operating speed increase damping characteristic parameters Results show stiffness friction factor |
修稿时间: | 2006/7/24 0:00:00 |
REDUCING VIBRATION WITH FRICTION-DAMPING IN HIGH-SPEED ROTOR SYSTEM |
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Authors: | Wang Liqin Li Wenzhong Gu Le Zheng Dezhi |
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Institution: | School of Meehatronies Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China |
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Abstract: | To reduce the excessive vibration of a high-speed rotor system at the critical speed, a friction damper with a flexible support structure is introduced. The mechanism of vibration reduction and support characteristics are analyzed and a friction damper is designed. The effect on an unbalanced response is studied. Results show that the stiffness factor and the friction-damping factor of the damper are related to the cone angle and the friction factor of the inner-ring when adopting a proper structure. By changing these parameters and the Z-directional stiffness of the outer-ring, the stiffness and the damping characteristic of the damper can be varied. Introducing a friction damper into the support can reduce the stiffness and increase the damping of the support, thus decreasing the critical speed to avoid the operating speed, suppress the resonant response of a rotor system, and attenuate vibration forces to the outside. |
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Keywords: | high-speed rotor system rolling-element bearing friction-damping vibration reduction critical speed |
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