A Study on Operating Characteristics of a Small-Sized Spiral Groove Bearing (1st Report) - Investigation on Oil-Keeping Ability of the Bearing -

Yabe H.; Hirayama T.

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A Study on Operating Characteristics of a Small-Sized Spiral Groove Bearing (1st Report) - Investigation on Oil-Keeping Ability of the Bearing -

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The capability of a small-sized spiral groove hydrodynamic journal bearing to keep the lubricating oil in the bearing clearance is one of the most important performances of the bearing, especially when it is applied to an HDD spindle motor system. In this paper, the oil-keeping ability of the bearing is investigated theoretically under an analytical model considering two basic mechanisms concerning the oil flow in the bearing; one is the pumping force to drive the oil flowing axially in the bearing clearance, when the rotor is in a non-concentric and tilting state against bearing center axis, and the other is the compensating force, which is derived by the meniscus of the oil at the bearing ends or by the occurrence of axially asymmetric distribution of the oil film region resulted by the axial oil flow. The tolerable unbalanced mass of the rotor is calculated supposing that the non-concentric and tilting attitude of the rotor is attributed to the synchronous whirl due to the unbalanced mass of the rotor

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《精密工学会誌》 |2000年第7期|1064-1069|共6页
作者
Yabe H.; Hirayama T.;
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CEPE;

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原文格式 PDF
正文语种日语
中图分类机械制造工艺;仪器、仪表;
关键词
spiral groove bearing; oil flow; surface tension; oil leakage; unbalanced mass; HDD spindle motor;

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A Study on Operating Characteristics of a Small-Sized Spiral Groove Bearing (1st Report) - Investigation on Oil-Keeping Ability of the Bearing -

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