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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference 2004(IJTC 2004) vol.1 pt.A; 20041024-27; Long Beach,CA(US) >CALCULATING ROTORDYNAMIC COEFFICIENTS OF A FERROFLUID-LUBRICATED AND HERRINGBONE-GROOVED JOURNAL BEARING VIA FINITE DIFFERENCE ANALYSIS
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CALCULATING ROTORDYNAMIC COEFFICIENTS OF A FERROFLUID-LUBRICATED AND HERRINGBONE-GROOVED JOURNAL BEARING VIA FINITE DIFFERENCE ANALYSIS

机译：用有限差分法计算铁液润滑和人字形沟槽轴承的转子动力系数

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摘要

The objective of this study to conduct finite difference analysis for investigating the rotordynamic characteristics of a hydrodynamic journal bearing (HDJB) filled with ferrofluid for lubrication and with herringbone grooves inside. The small-sized journal bearing serves well as the candidate for supporting high-speed rotating spindles of data-storage drives; such as hard disc drives and optical disc derives. The analysis results are expected to serve for distilling design guidelines of these small HDJBs with main goals of reaching higher stiffnesses and simultaneously owns largest stability margin, the mostly-common design goals of small HDJBs. To fulfill the aforementioned goal, the present study starts with building the mass flux equations of the grooved bearing filled with ferrofluid, which is followed by the discretization over the bearing clearance domain and derivation of finite difference equations based on mass flow balance over the clearance domain. Finally, the pressure distribution of fluid film, stiffnesses, damping coefficients, and critical mass are computed. Results show the capability of the ferrofluid to alter or even improve the general dynamic characteristics of a grooved journal bearing.
机译：这项研究的目的是进行有限差分分析，以研究装有铁磁流体润滑和内部有人字形凹槽的流体动力滑动轴承（HDJB）的转子动力特性。小型轴颈轴承非常适合用于支持数据存储驱动器的高速旋转主轴。如硬盘驱动器和光盘衍生。分析结果有望用于提炼这些小型HDJB的设计指南，其主要目标是达到更高的刚度，同时拥有最大的稳定性裕度，这是小型HDJB的最常见设计目标。为了实现上述目标，本研究首先建立填充有铁磁流体的开槽轴承的质量通量方程，然后对轴承游隙域进行离散化，并根据游隙域上的质量流量平衡推导有限差分方程。 。最后，计算流体膜的压力分布，刚度，阻尼系数和临界质量。结果表明，铁磁流体能够改变甚至改善带槽轴颈轴承的总体动力特性。

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