Viewpoints on noise in grease lubricated bearings

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Keyword: Engineering and Technology, Mechanical Engineering, Tribology (Interacting Surfaces including Friction, Lubrication and Wear), Teknik och teknologier, Maskinteknik, Tribologi (ytteknik omfattande friktion, nötning och smörjning), Machine Elements, Maskinelement
Publication year: 1994
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The noise level of a rolling element bearing is normally low, compared to the noise from the machine in which the bearing operates. Under certain circumstances, though, the noise caused by the bearing can be crucial and might influence the operation, for example, of very sensitive equipment. When lubricating rolling element bearings with grease, the noise level will depend upon the type of grease used. The relationship between structure and composition of lithium greases, and the noise they cause in rolling element bearings, is the subject of this paper. Different lithium greases have been studied in a model of the contact between ball and race in a bearing, using a ball and disc machine, as well as optical interferometry. The bearing noise levels have also been measured, using the same greases, and their microscopic structure studied, with the bearing noise level. Normal lithium greases cause disturbances in the model contact and also noise in a ball bearing. The noise level and the amount of disturbance is connected, with formations found in the microscopic grease structure. This technical paper can be obtained from the ELGI Office; see page 38 for ELGI address


Henrik Åström

Luleå tekniska universitet
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Erik Höglund

Luleå tekniska universitet; Maskinelement
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