Nonlinear dynamic behaviour of vertical and horizontal rotors in compliant liner tilting pad journal bearings: Some design considerations

Dynamic behaviour of vertical and horizontal rotors in journal bearings with line pivot pads is investigated. Two bearing designs are compared: one with white metal pads and another with compliant liner pads. The influence of elasticity of the liner on the journal orbits is investigated. Some practi...

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Bibliographic Details
Published in:Tribology international 2015-02, Vol.82, p.142-152
Main Authors: Cha, Matthew, Glavatskih, Sergei
Format: Article
Language:English
Subjects:
Bearing design parameters
Compliant liner
Horizontal
Journal bearings
Journal orbit
Liners
Modulus of elasticity
Nonlinear dynamics
Orbits
Pivots
Rotors
Tilting pad journal bearings
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Summary:Dynamic behaviour of vertical and horizontal rotors in journal bearings with line pivot pads is investigated. Two bearing designs are compared: one with white metal pads and another with compliant liner pads. The influence of elasticity of the liner on the journal orbits is investigated. Some practical aspects of the compliant liner pad design are discussed. Compliant bearing design parameters such as preload factor, pivot offset, radial clearance, viscoelasticity, and pad inclination to control the size of the journal orbit are considered. •There is an angular shift of a vertical rotor orbit in compliant bearings.•Stiffening pad liner towards side edges increases oil film thickness in the midplane.•Lower power loss in compliant bearings are due to the generally thicker oil film.•Combined effect of increased pivot offset and preload is lower power loss.
ISSN:0301-679X
1879-2464
1879-2464
DOI:10.1016/j.triboint.2014.10.011