By Piet M. Lugt

The definitive publication at the technological know-how of grease lubrication for curler and needle bearings in commercial and motor vehicle engineering.

Grease Lubrication in Rolling Bearings provides an summary of the present wisdom at the a variety of features of grease lubrication (including lubrication platforms) and the cutting-edge types that exist at the present time. The publication stories the actual and chemical facets of grease lubrication, basically directed in the direction of lubrication of rolling bearings.

The first a part of the booklet covers grease composition, houses and rheology, together with thermal and dynamics homes. Later chapters disguise the dynamics of greased bearings, together with grease lifestyles, bearing existence, reliability and checking out. the ultimate bankruptcy covers lubrications structures – the structures that convey grease to the parts requiring lubrication.

Grease Lubrication in Rolling Bearings:

  • Describes the underlying actual and chemical houses of grease.
  • Discusses the influence of load, pace, temperature, bearing geometry, bearing fabrics and grease style on bearing wear.
  • Covers either bearing and grease functionality, together with thermo-mechanical getting old and checking out methodologies.

It is meant for researchers and engineers within the petro-chemical and bearing undefined, industries regarding this (e.g. wind turbine undefined, car undefined) and for software engineers. it is going to even be of curiosity for educating in post-graduate courses.

Content:
Chapter 1 creation (pages 1–4):
Chapter 2 Lubrication Mechanisms (pages 5–21):
Chapter three Grease Composition and homes (pages 23–69): P.M. Lugt and D.M. Pallister
Chapter four Grease lifestyles in Rolling Bearings (pages 71–98):
Chapter five Lubricating Grease Rheology (pages 99–136):
Chapter 6 Grease and Base Oil move (pages 137–155):
Chapter 7 Grease Bleeding (pages 157–170): P.M. Lugt and P. Baart
Chapter eight Grease getting older (pages 171–190): P.M. Lugt and D.M. Pallister
Chapter nine movie Thickness thought for Single Contacts (pages 191–226): P.M. Lugt, M.T. van Zoelen and C.H. Venner
Chapter 10 movie Thickness in Grease Lubricated Rolling Bearings (pages 227–243): P.M. Lugt, M.T. van Zoelen and C.H. Venner
Chapter eleven Grease Dynamics (pages 245–255):
Chapter 12 Reliability (pages 257–282): J.H. Tripp and P.M. Lugt
Chapter thirteen Grease Lubrication and Bearing lifestyles (pages 283–308): P.M. Lugt and A. Gabelli
Chapter 14 Grease Lubrication Mechanisms in Bearing Seals (pages 309–326): P.M. Lugt and P. Baart
Chapter 15 situation tracking and upkeep (pages 327–337):
Chapter sixteen Grease Qualification trying out (pages 339–375):
Chapter 17 Lubrication platforms (pages 377–411): P.M. Lugt, R. Stockhammer and P. Conley
Chapter A features of Paraffinic Hydrocarbons (page 413):

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Extra resources for Grease Lubrication in Rolling Bearings

Example text

In this chapter, the composition and properties of lubricating greases will be described. The definition of grease is diverse. Grease is defined by the National Lubricating Grease Institute (NLGI) [450] and the American Society for Testing and Materials in ASTM D288 [195] as ‘a solid to semi-fluid product or dispersion of a thickening agent in a liquid lubricant. ˇ epina [560] defines Other ingredients imparting special properties may also be included’. Stˇ grease as ‘lubricating greases are colloidal systems (dispersions), mostly gels, rarely sols, in which the dispersive (continuous) phase is formed of lubricating oil and the dispersed phase (thickener) is an anisotropic solid which penetrates the liquid phase so that the gel produced acquires properties characteristic of the plastic (solid) state’.

Booster and Wilcock [97]). This was also clearly found in the spherical roller bearings test from Wilstr¨om and H¨oglund [611, 612] where both grease and base oil were used and where equal friction torque was measured. Mas and Magnin [402] investigated grease before and after running in tapered roller bearings and found an increased viscosity of the grease and reduced oil content under the cages. This implies that grease bleeding occurs from grease located under the cage bar. However, they also show by means of SEM the destruction of fibres in the raceway, confirming once more Cann et al.

They are hydrophobic, repelling water and protecting metal components from rust and corrosion. Mineral oils are compatible with a wide range of grease thickener and additive systems [471, 480]. 2 27 API (American Petroleum Institute) Group Base Oil Classification [471, 507]. 01 – 80–120 80–120 >120 >120 – typically contain hydrocarbons with 25 or more carbon atoms. 154 nm, such a molecule would be approximately 3 nm long. 17 nm. 2 nm. Typical EHL films are in the order of 500 nm, which means that a maximum of about 2500 molecules would fit over the height of such a film.

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