Experimental and analytical determination of friction torque of a double row roller slewing bearing

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2015

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Dindar, Ahmet

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Friction at low speeds is accepted as the most dominant destabilizing factor in gun turrets, since precise aiming to the target is conducted at low speeds. So, the causes and mechanisms of friction in gun turrets should be investigated. The friction is mainly caused by the bearings in the rotation axes. In this thesis, investigation on the friction torque of a double row roller slewing bearing which is operated in the azimuth axis of a gun turret is performed. For this purpose, a friction measurement test setup is designed and friction torque measurements are conducted. Tests are performed at various speeds and loading conditions. Friction sources are decoupled and examined separately in order to fully understand effect of each component on friction torque of the slewing bearing. Therefore, friction caused by rolling motion and friction caused by two different types of lip seals are investigated. In addition, friction identification analyses are performed. In the analysis, load distribution of the bearing is calculated by finite element analysis software and rolling motion is simulated with a multibody dynamic analysis program. Consequently, analyses results are compared and verified with the test results.

Subject Keywords

Friction., Torque., Roller bearings., Bearings (Machinery).

URI

http://etd.lib.metu.edu.tr/upload/12619573/index.pdf
https://hdl.handle.net/11511/25305

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Dindar, “Experimental and analytical determination of friction torque of a double row roller slewing bearing,” M.S. - Master of Science, Middle East Technical University, 2015.