An Empirical Investigation of the Impact of an Axially Oscillating Shaft on Friction and Lubrication in Cylindrical Roller Bearings

Title data

Meinel, Andreas ; Tremmel, Stephan:
An Empirical Investigation of the Impact of an Axially Oscillating Shaft on Friction and Lubrication in Cylindrical Roller Bearings.
In: Bearing World Journal. Vol. 3 (2018) . - pp. 41-55.
ISSN 2513-1753

Official URL:

Abstract in another language

Rolling element bearings experience dynamic axial thrust and oscillating shaft movements of various frequencies and amplitudes in a multitude of applications, especially in heavy-duty machinery. These operating conditions can cause significant friction losses which entails higher operating temperatures and lower lubricant operating viscosities. Dynamic axial shaft movements increase shearing between rollers and raceways excessively which impairs the mechanical stability of the lubricant. In consequence, this results in accelerated lubricant degradation and may cause insufficient lubrication or even premature bearing failure. In order to choose a suitable lubricant for such a bearing application that experiences axial shaft movements or to be able to adequately schedule lubricant maintenance intervals, the occurring shear- or friction forces between rollers and raceways due to the axial oscillations are of particular interest. Therefore, in an experimental study, an oil-lubricated cylindrical roller bearing NU210 has been subjected to dynamic axial shaft movements of various frequencies and amplitudes. Two specifically designed bearing test rigs are introduced within the scope of this paper and the experimental procedure is presented. The results obtained which include measurements of axial friction forces between rollers and raceways, steady-state operating temperatures, bearing friction losses as well as cage slippage are discussed in detail and an axial friction coefficient is derived from the results. Concluding, a short assessment is given, to what extend axial shaft movements might exhibit a critical impact on lubricant performance, friction and wear.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Keywords:	cylindrical roller bearings; oscillations; bearing friction; lubrication
Institutions of the University:	Faculties > Faculty of Engineering Science > Chair Engineering Design and CAD Profile Fields > Advanced Fields > Advanced Materials Profile Fields > Emerging Fields > Energy Research and Energy Technology Faculties Faculties > Faculty of Engineering Science Profile Fields Profile Fields > Advanced Fields Profile Fields > Emerging Fields
Result of work at the UBT:	No
DDC Subjects:	600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited:	21 Sep 2020 11:13
Last Modified:	21 Sep 2020 11:13
URI:	https://eref.uni-bayreuth.de/id/eprint/57179