Analysis of a grease-lubricated roller bearing under arctic conditions

• This paper summarizes measurements of starting torque and motion of the rollers in a roller bearing during start-up at a temperature of -30 °C. The bearing was lubricated with three different greases and the tests were carried out after a running-in procedure at +20 °C. The results were compared with measurements obtained at +20 °C and with results from one base oil at +20 °C. A model for the roller motion was also built and simulations of the roller motion were compared with the measurements. Independent of temperature and lubricant the rollers rolled in the loaded zone and slipped, more or less, in the unloaded zone. The degree of sliding in the unloaded zone was found to be governed mainly by the local lubricant distribution and the position of the roller in the cage pocket. Some differences are also seen in the slide-roll ratio between the lubricants. A roller diameter difference of 1.3 μm gave a significant difference in roller motion, with the slightly thinner roller slides more in the unloaded zone of the bearing.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Maskinteknik -- Tribologi (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Mechanical Engineering -- Tribology (hsv//eng)

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Machine Elements

Maskinelement

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