国外文献 > 1.轴承 > 1. 基础理论与机制 > 摩擦与润滑
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| 标 题： |
3D Numerical investigation of pressure field of an orifice compensated hydrostatic bearing
孔隙补偿静压轴承压力场的三维数值分析 |
| 作 者： |
Ghezali, Faiza
Bouzidane, A.
Thomas, M. |
| 关键词： |
Pressure field [压力场]
ANSYS-CFX [ ANSYS-CFX]
3D-Reynolds averaged Navier Stokes [ 三维雷诺平均纳维-斯托克斯方程]
SST k-omega [ SST k-omega]
Reynolds equation [ 雷诺方程] |
| 出版年： |
2017 |
| 期刊名： |
Mechanics & Industry
机械与工业 |
| 年卷期： |
2017, vol.18, no.1 |
| 摘 要： |
In recent years, much attention has been given to hydrostatic/hybrid journal bearings in research due to their wide spread engineering applications, such as: high speed turbomachinery, machine tools spindles, cryogenic equipment, and precision grinding. However, the activity toward improved understanding of the flow regimes and the associated pressure pattern in the recess flow phenomena is still needed. The objective of this work is to provide an understanding of the influence of regime flow in recess on the pressure field of hydrostatic bearing flat pad fed by orifice restrictor and orifice inertia. 3D Reynolds averaged Navier Stokes equations with the SST-k omega turbulence model are applied in order to investigate the effects of pressure supply, dynamic viscosity and recess depths on the pressure profile. The finite volume method implemented in the ANSYS-CFX software is used. To prove the robustness of CFD code, a comparison of the numerical results and the Reynolds equation is performed at very deep recess. The results exhibit very good agreements between CFD and Reynolds equation methods. On the other hand, the several cases treated in this work contribute also to analyze and to explain the main reasons providing the inertia and the Rayleigh effect in recess flow.
近年来，由于静压/混合式轴向轴承在高速涡轮机械、机床主轴、低温设备和精密磨削等工程应用中的广泛应用，该领域受到了广泛关注。然而，对于凹槽流动现象中不同流动状态及其对应压力分布的研究仍需进一步深入。本研究旨在探讨凹槽内流动状态对由孔口限流器和孔口惯性供给的静压轴承平垫压力场的影响。采用SST-k omega湍流模型，结合三维雷诺平均纳维-斯托克斯方程，分析了压力供给、动态粘度以及凹槽深度对压力分布的影响。使用ANSYS-CFX软件中的有限体积法进行数值模拟。为验证CFD代码的可靠性，在极深凹槽条件下对比了数值结果与雷诺方程计算结果。结果显示，CFD方法与雷诺方程方法具有良好的一致性。另一方面，本文所处理的几个案例也有助于分析和解释导致凹槽流动中惯性力和瑞利效应的主要原因。 |
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