Operational experience and scientific investigations results showed that polymer lined hydrodynamic bearings can withstand more severe operating conditions compared than white metal bearings. PTFE and PEEK-based coatings are the most frequently used as Babbitt alternatives. Both polymers differ significantly from the each other in material properties. According to catalogue data compression modulus of PTFE, it is about an order of magnitude smaller compared to PEEK. This seems to have a significant influence on coating deflection (oil gap geometry) during bearing operation and as a consequence on bearing properties. Additionally, in order to bond polymer to pad steel body, it is necessary to apply intermediate layer, which also changes the stiffness of the bearing lining. In this work results of the compression tests of the samples cut out from a bearing pad are presented. Two types of material coatings were tested: PTFE-based and PEEKbased polymers. Tests were carried out for four temperatures varying from 25 to 120 oC. As a result, apparent compression modulus of the coatings as a function of temperature was evaluated. Results proved that both materials show significant differences in behaviour under compression.
Authors
Additional information
- Category
- Aktywność konferencyjna
- Type
- publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
- Language
- angielski
- Publication year
- 2015
