首页> 外文会议>World Tribology Congress III 2005 vol.2 >CHARACTERIZATION OF OIL FILM CONTROL FORCES UNDER ACTIVE LUBRICATION REGIME
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CHARACTERIZATION OF OIL FILM CONTROL FORCES UNDER ACTIVE LUBRICATION REGIME

机译:主动润滑方式下油膜控制力的表征

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Journal bearings under active lubrication regime are controlled by servo valves and well-tuned feedback control laws. The servo valves dynamically modify the journal pressure distribution generating active oil film forces. Such forces are dependent on the following parameters: Sommerfeld number, bearing pre-load factor, orifice diameter, excitation frequency, feedback control gain and dynamic parameters of the servo valves, i.e. their natural frequencies, damping factors and pressure-flow coefficients. The theoretical and experimental characterization of such active forces is the main focus and the main contribution of this work. The theoretical analyzes are based on the Modified Reynolds' equation for active lubrication. The experimental analyzes are carried out by using a special test rig, designed to investigate the behavior of tilting-pad bearings (TPJB) under active lubrication. Relative good agreement between theoretical and experimental behavior of the active oil film forces as a function of the excitation frequency and control gain is achieved. Limitations of the characterization procedure is critically discussed in order to explain some discrepancies between theoretical and experimental results.
机译:主动润滑状态下的轴颈轴承由伺服阀和经过良好调整的反馈控制律控制。伺服阀可动态修改轴颈压力分布,从而产生有效的油膜力。这些力取决于以下参数:索默费尔德数,轴承预紧系数,孔口直径,励磁频率,反馈控制增益和伺服阀的动态参数,即其固有频率,阻尼系数和压力流量系数。这种作用力的理论和实验表征是这项工作的主要重点和主要贡献。理论分析基于主动润滑的Modified Reynolds方程。通过使用特殊的试验台进行实验分析,该试验台旨在研究主动润滑下可倾瓦轴承(TPJB)的性能。活性油膜力的理论和实验行为之间的相对良好一致性是激励频率和控制增益的函数。为了解释理论和实验结果之间的某些差异,严格讨论了表征过程的局限性。

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