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The Influence of the Centripetal Acceleration on the Temperature Behavior of Rolling Bearings

Title data

Hochrein, David ; Tremmel, Stephan ; Wartzack, Sandro:
The Influence of the Centripetal Acceleration on the Temperature Behavior of Rolling Bearings.
In: Bearing World Journal. Vol. 3 (2018) . - pp. 57-69.
ISSN 2513-1753

Abstract in another language

The bearing temperature is one of the essential variables in order to describe a bearing system. Especially under extreme conditions such as external accelerations, an unsuitable temperature development at the bearing position can cause significant damage. This work examines the temperature behavior under the influence of high centripetal accelerations up to 1 000- times gravity. Therefore, the factors centripetal acceleration, relative speed of the specimen and the oil flow rate were varied systematically. Contrary to our expectations, the temperature does not rise with an increase of the centripetal acceleration. This behavior can essentially be explained by the impact of the acceleration to the supplied oil flow rate. Therefore the increased injection speed of the lubricating and cooling oil leads to a better cooling of the roller bearings and the bearing temperature nearly remains constant. If the relative speed of the specimen increases, the bearing temperature behaves as with bearings, which are not exposed to the influence of high accelerations. E.g. the temperature rises, even if only moderate. The temperature behavior was analyzed and evaluated in the context of the present frictional moment. In order to achieve a sufficient cooling effect by the lubricating oil flow an appropriate amount of lubricant is necessary. The present investigation showed that with roller bearings exposed to centripetal accelerations the necessary amount of oil is about ten times higher than under normal circumstances. Appropriate flow rates depending on the requirements were identified by the variation of the oil flow rate. A look at the overall context shows that the bearing temperature is not an exclusion criterion for the use of roller bearings exposed to high accelerations. With an appropriate design of the oil supply also a self-regulation effect of the oil flow rate can be achieved by the present accelerations.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: roller bearings; centripetal acceleration; temperature behaviour; appropriate oil supply quantity
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
Result of work at the UBT: No
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 21 Sep 2020 11:09
Last Modified: 21 Sep 2020 11:09
URI: https://eref.uni-bayreuth.de/id/eprint/57086