Analysis of a Hydrodynamic Bearing of a HDD Spindle Motor at Elevated Temperature
Analysis of a Hydrodynamic Bearing of a HDD Spindle Motor at Elevated Temperature
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DOI：
10.1115/1.1611500
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发表时间：
2004-04
影响因子：
2.5
通讯作者：
G. Jang;Ki-Youn Kim;H. Lee;Chung-hee Kim
中科院分区：
文献类型：
--
作者：
G. Jang;Ki-Youn Kim;H. Lee;Chung-hee Kim
本文提出了一种研究HDD主轴电机动压轴承特性的方法，该方法考虑了游隙的变化以及高温引起的润滑油粘度的变化。通过热传导和热变形的迭代有限元分析，确定了动压轴承在高温下的粘度和游隙，直至轴承区温度收敛。通过将高温和室温下的计算温度与实测值进行比较，验证了该方法的有效性。研究表明，温度升高会改变硬盘主轴电机动压轴承的游隙和润滑剂粘度。在确定了硬盘主轴电机动压轴承的粘度和游隙后，利用雷诺方程的有限元分析方法研究了高温下硬盘主轴电机动压轴承的静、动态特性。研究还表明，由于温度升高而引起的间隙变化是影响硬盘主轴电机动压轴承静动态特性的另一个重要设计考虑因素。
This paper presents a method to investigate the characteristics of hydrodynamic bearings of a HDD spindle motor considering the variation of the clearance as well as the lubricant viscosity due to elevated temperature. Iterative finite element analysis of heat conduction and thermal deformation is performed to determine the viscosity and clearance of hydrodynamic bearings at elevated temperature until the temperature in the bearing area converges. The proposed method is verified by comparing the calculated temperature with the measured one at elevated surrounding temperature as well as in room temperature. This research shows that elevated temperature changes the clearance as well as the lubricant viscosity of the hydrodynamic bearings of a HDD spindle motor. Once the viscosity and clearance of hydrodynamic bearings of a HDD spindle motor are determined, finite element analysis of the Reynolds equation is performed to investigate the static and dynamic characteristics of hydrodynamic bearings of a HDD spindle motor at elevated temperature. It also shows that the variation of clearance due to elevated temperature is another important design consideration which affects the static and dynamic characteristics of the hydrodynamic bearings of a HDD spindle motor