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Lubricants 2015, 3(2), 164-180; doi:10.3390/lubricants3020164

Friction and Lubrication of Large Tilting-Pad Thrust Bearings

Faculty of Mechanical Engineering, Gdansk University of Technology, Narutowicza 11/12, Gdańsk 80-233, Poland
Academic Editor: Michel Fillon
Received: 28 November 2014 / Revised: 6 February 2015 / Accepted: 11 March 2015 / Published: 3 April 2015
(This article belongs to the Special Issue Friction and Lubrication of Bearings)
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Abstract

Fluid film bearings have been extensively used in the industry because of their unbeatable durability and extremely low friction coefficient, despite a very low coefficient of friction dissipation of energy being noticeable, especially in large bearings. Lubricating systems of large tilting pad thrust bearings utilized in large, vertical shaft hydrogenerators are presented in this paper. A large amount of heat is generated due to viscous shearing of the lubricant large tilting pad thrust bearings, and this requires systems for forced cooling of the lubricant. In the dominant bath lubrication systems, cooling is realized by internal coolers or external cooling systems, with the latter showing some important advantages at the cost of complexity and also, potentially, lower reliability. Substantial losses in the bearings, reaching 1 MW in extreme cases, are a good motivation for the research and development aimed at reducing them. Some possible methods and their potential efficiency, along with some effects already documented, are also described in the paper. View Full-Text
Keywords: fluid film bearings; tilting pad bearings; energy efficiency; friction losses fluid film bearings; tilting pad bearings; energy efficiency; friction losses
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wasilczuk, M. Friction and Lubrication of Large Tilting-Pad Thrust Bearings. Lubricants 2015, 3, 164-180.

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