Field performance of heavily loaded thrust bearings with PTFE faced pads
2008 (English)In: Conference proceedings, STLE annual meeting & exhibition: May 18 - 22, 2008, Cleveland, OH, 2008Conference paper (Refereed)
This paper reports results from the field tests of PTFE (polytetrafluoroethylene) faced thrust bearings operating at heavy loads. The PTFE composite bearing technology allows significant improvements in sliding bearing performance. Traditional white metal coating is substituted by a layer of PTFE composite. There are several advantages of using PTFE composites as a pad facing material, especially for hydroelectric equipment subjected to severe operating conditions. PTFE has a thermal conductivity about 170 times lower than that of white metal. Introduction of a thermal barrier, a layer of PTFE, between the oil film and pad backing reduces pad thermal deflection and, consequently, increases bearing load carrying capacity. Elasticity of the PTFE layer helps in adjusting the oil film shape in such a way that the bearings can carry higher loads. This paper also presents some temperature and oil film data for a bearing operating at a specific load of 11 MPa. The bearing was in operation 20 years. No significant signs of damage were observed when the bearing was dismantled in 2006.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:kth:diva-80648OAI: oai:DiVA.org:kth-80648DiVA: diva2:496729
2008 Annual Meeting of the Society of Tribologists and Lubrication Engineers, STLE 2008; Cleveland, OH; 18 May 2008 through 22 May 2008
QC 201202172012-02-102012-02-102012-02-17Bibliographically approved