Wear-in behaviour of polycrystalline diamond thrust bearings

Polycrystalline diamond (PCD) bearings are designed for use in harsh environments, including process-fluid-lubricated applications such as those in oil and gas drilling turbines. This paper discusses the wear-in behaviour of polycrystalline diamond thrust bearings. Laboratory test results are presen...

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Bibliographic Details
Published in:Wear 2011-07, Vol.271 (9), p.2106-2110
Main Authors: Knuteson, C.W., Sexton, T.N., Cooley, C.H.
Format: Article
Language:English
Subjects:
Applied sciences
Bearings
Bearings, bushings, rolling bearings
Coefficient of friction
Drives
Exact sciences and technology
Fluid-film
Friction, wear, lubrication
Hydrodynamic
Laboratory tests
Lubrication
Machine components
Mechanical engineering. Machine design
PCD
Polycrystalline diamond
Thrust bearings
Wear
Wear-in
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Summary:Polycrystalline diamond (PCD) bearings are designed for use in harsh environments, including process-fluid-lubricated applications such as those in oil and gas drilling turbines. This paper discusses the wear-in behaviour of polycrystalline diamond thrust bearings. Laboratory test results are presented that show the roughness, profile, and coefficient of friction of the polycrystalline diamond wear pads as the wear-in of the polycrystalline diamond bearings progresses. Laboratory test results show a significant decrease in the surface roughness and a change in the profile of the wear pads. Measured values of the coefficients of friction reveal that the lubrication regime of PCD thrust bearings can move from boundary to mixed-mode and may even become hydrodynamic after wearing-in for a period of time under the right conditions. This mechanism can provide extended life for PCD thrust bearings in harsh environments.
ISSN:0043-1648
1873-2577
DOI:10.1016/j.wear.2010.12.059