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首页> 外文会议>International Symposium on Stability Control of Rotating Machinery(ISCORMA-4); 20070827-31; Calgary(CA) >STABILITY IMPROVEMENT OF A ROTOR SYSTEM BY MEANS OF FLEXIBLE SLEEVE FLUID FILM BEARING
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STABILITY IMPROVEMENT OF A ROTOR SYSTEM BY MEANS OF FLEXIBLE SLEEVE FLUID FILM BEARING

机译：柔性套液膜轴承提高转子系统的稳定性

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摘要

This paper presents a newly developed flexible sleeve fluid film bearing for the vibration control of rotating machinery. Compared to a traditional fluid film bearing, the main feature of this bearing is the thin oil film beneath the flexible sleeve. The oil pressure beneath the flexible sleeve can be varied externally to achieve the desired dynamic performance in terms of the stability threshold of the rotor bearing system. Linear and non-linear models have been developed for the rotor system which incorporates this new bearing. Modeling of the rotor and flexible sleeve is based on the finite element method and condensation techniques. The Reynolds equation is solved with the help of the finite difference method. The contribution of different design variables, such as the thickness oil chamber under the flexible sleeve, location of the external oil injection, thickness of the flexible sleeve etc. are investigated by means of the numerical simulations of the system motion. To extend the stability threshold of the rotor bearing system a genetic algorithm based optimization method has been introduced to optimize the design of this new bearing. Experimental work is also presented to verify the theoretical prediction of the stability threshold. The experimental work shows, within acceptable tolerances, that the presented mathematical model can predict the performance of the rotor bearing system in terms of the orbit of the journal, critical speed of the rotor system and the stability threshold.
机译：本文提出了一种新开发的用于旋转机械振动控制的柔性套流体膜轴承。与传统的液膜轴承相比，该轴承的主要特点是柔性套筒下方的薄油膜。根据转子轴承系统的稳定性阈值，可从外部改变柔性套筒下方的油压，以实现所需的动态性能。已经为装有这种新轴承的转子系统开发了线性和非线性模型。转子和挠性套筒的建模基于有限元方法和冷凝技术。雷诺方程借助于有限差分法求解。通过系统运动的数值模拟，研究了不同设计变量的影响，例如柔性套筒下方的油腔厚度，外部注油位置，柔性套筒的厚度等。为了扩展转子轴承系统的稳定性阈值，引入了一种基于遗传算法的优化方法来优化这种新型轴承的设计。还提出了实验工作，以验证稳定性阈值的理论预测。实验工作表明，在可接受的公差范围内，所提出的数学模型可以根据轴颈的轨道，转子系统的临界速度和稳定性阈值预测转子轴承系统的性能。

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