Enhancing the lifetime of MoS2-lubricated ball bearings

Solid lubricated ball bearings can be a choice, if standard lubrication cannot be used, as for example because of surroundings like high temperature or vacuum. Law enforcements as well can be a reason for choosing such bearings. Although molybdenum disulfide (MoS2) as one kind of solid lubrication f...

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Bibliographic Details
Published in:Wear 2013-06, Vol.303 (1-2), p.169-177
Main Authors: Marquart, M., Wahl, M., Emrich, S., Zhang, G., Sauer, B., Kopnarski, M., Wetzel, B.
Format: Article
Language:English
Subjects:
Applied sciences
Ball bearings
Bearings
Cage
Coatings
Contact
Exact sciences and technology
Friction, wear, lubrication
Lubrication
Machine components
Mechanical engineering. Machine design
Molybdenum disulfide
Simulation
Solid lubrication
Surface analyses
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Summary:Solid lubricated ball bearings can be a choice, if standard lubrication cannot be used, as for example because of surroundings like high temperature or vacuum. Law enforcements as well can be a reason for choosing such bearings. Although molybdenum disulfide (MoS2) as one kind of solid lubrication for ball bearings has been known for 60 years, a universal valid lifetime prediction has not been developed yet. This paper presents an overview of the possible approaches to get an idea of the lifetime for such systems. Options to enhance the life by redesigning the cage are shown, among others by the use of mulitbody simulation. Furthermore first results of investigating the materials, coatings and the transfer of additional lubrication from the cage to the primary contact between rolling body and raceway are presented. •Enhancing the lifetime of solid lubricated rolling bearings by using the cage as a reservoir.•MoS2 particles which were dispersed in cages serve in friction process as lubricant reservoirs.•MoS2 transfer from cage-reservoir to raceway enhances lifetime of solid lubricated ball bearings.
ISSN:0043-1648
1873-2577
DOI:10.1016/j.wear.2013.03.003