Tilting pad thrust bearings

Dynamic coefficients for a lemon bore journal bearing with a compliant PTFE surface are computed. An efficient method for the calculation of bearing dynamic coefficients proposed by Lund [4] has been extended to compliant bearings. Comparison with a rigid babbitted lemon bore journal bearing in terms of dynamic coefficients and stability is given and discussed. It is shown that it is important to consider perturbations of both the oil film and the compliant lining to obtain realistic results. It is also shown that stability of compliant bearings is improved at some eccentricities compared with conventional babbitted bearings.

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“…By substituting (4) and 17into (1) and simplifying the result, we get the following modifications of equations (5), (7) and 9:…”

Section: Full Perturbation Modelmentioning

confidence: 99%

“…Long term experience with polymer facings in large hydrodynamic thrust bearings has shown significant improvements in bearing performance. More details on such improvements can be found in [1]. The application of polymers as journal bearing linings is also very promising.…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of a Compliant Lemon Bore Journal Bearing

Кузнецов

Glavatskih

2008

Volume 3: Design; Tribology; Education

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“…However, this will come at the expense of lower film thickness and higher peak pressures. Glavatskih 17 discusses various studies using TEHD models and notes that 65% is reported as optimum column location with respect to minimum peak pressure and temperature.…”

Section: Resultsmentioning

confidence: 99%

Geometrical design parameters for journal bearings with flexure pads and compliant liners

Thomsen

Klit

2012

Proceedings of the Institution of Mechanical Engineers, Part J:

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A hydrodynamic journal bearing utilizing flexure pads with a compliant liner is studied and its performance enhanced through a parametric study. The main geometrical dimensions are varied and the affect on pad performance is analyzed. This will put more knowledge into the design and function of flexure pads. Guidelines are given to the design of the pads and are also covering the polymer liner. It is found that the use of flexure pads is an attractive alternative to pivoted pads. Pivot contact-related failure modes are eliminated and load capacity is not restricted by the force that can be transferred through the pivot contact. When combined with a polymer liner, the pad performance is enhanced further, especially when operating at thin lubricant films.

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“…Friction between the sliding contacts results in the generation of localised heat and stress leading to a rise in temperature and generation of wear particles, ultimately causing material damage and premature failure of the bearings 1 . The appropriate employment of bearing materials as well as lubricants can overcome such threats by the reduction of friction with the formation of an adequate lubricating film.…”

Section: Introductionmentioning

confidence: 99%

Tribological behaviour ofUHMWPEcomposites lubricated by polyvinylpyrrolidone‐modified water

Dhakal

Shi

Emami

2021

Lubrication Science

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Tribological characteristics of ultra‐high molecular weight polyethylene (UHMWPE) composites with 10% short carbon fibres (SCF) lubricated in water with polyvinylpyrrolidone (PVP) as a modifier were investigated. The aqueous solutions with varying concentrations of PVP were prepared, and their viscosity‐enhancing action, friction‐reducing properties and anti‐wear performances were studied under different loading conditions equivalent to 10 and 20 MPa of contact pressures at a constant sliding speed of 20 mm/s. The results showed that PVP is an excellent viscosity modifier for water. PVP‐modified water exhibited excellent performance compared to distilled water, reducing the wear and friction coefficient of neat UHMWPE up to 25%. The anti‐wear properties of UHMWPE‐SCF composite were also improved with PVP modified water lubrication, yielding a maximum reduction of wear up to 45%. PVP seems to be a promising additive of modifying the lubricating properties of distilled water for water‐based lubrication.

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Tilting pad thrust bearings

Cited by 9 publications

References 37 publications

Stability Analysis of a Compliant Lemon Bore Journal Bearing

Stability Analysis of a Compliant Lemon Bore Journal Bearing

Geometrical design parameters for journal bearings with flexure pads and compliant liners

Tribological behaviour ofUHMWPEcomposites lubricated by polyvinylpyrrolidone‐modified water

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