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Bearing modulus
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Bearing modulus : ウィキペディア英語版
Bearing modulus
Bearing modulus is a modulus used in journal bearing design. It is a dimensionless number.
==Formula==
Bearing Modulus (C) is C = (Zn/p) where
* Z = oil viscosity
* n = speed of rotation (rpm)
* p = bearing pressure
For any given bearing, there is a value for indicated by C, for which the coefficient of friction is at a minimum. The bearing should not be operated at this value of bearing modulus, since a slight decrease in speed or a slight increase in pressure will make the part of a shaft or axle that rests on bearings operate in partial lubrication state resulting in high friction, heating and wear.
To prevent this, the average value of Bearing modulus should be
* Zn/p >= 3C
or for large fluctuations and heavy impact loads
* Zn/p = 15C (approx)

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Bearing modulus」の詳細全文を読む



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