Elastohydrodynamic simulation of Rayleigh step bearings in thin film hydrodynamic lubrication

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17 Citations (Scopus)

Abstract

An elastohydrodynamic numerical simulation is conducted for one-dimensional Rayleigh step bearings. The numerical model incorporates the piezoviscous effect of the lubricant and the elastic deformation of the bounding surfaces to solve the one-dimensional Reynolds equation. It is found that a small elastic deformation of less than 200 nm is responsible for film formation in thin film hydrodynamic lubrication. As the film thickness decreases, the divergent shape in the step zone causes delay in pressure growth, resulting in considerable reduction of load capacity while the convergent shape in the land zone improves slightly load capacity in some cases. Rayleigh step bearings have higher load capacity than fixed plane bearings because of the remained step shape.

Original languageEnglish
Pages (from-to)204-214
Number of pages11
JournalTribology International
Volume64
DOIs
Publication statusPublished - May 14 2013

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Bearings (structural)
elastohydrodynamics
Elastohydrodynamics
lubrication
Lubrication
Hydrodynamics
hydrodynamics
Elastic deformation
Thin films
elastic deformation
thin films
Reynolds equation
simulation
Film thickness
Lubricants
Numerical models
lubricants
film thickness
Computer simulation
causes

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Cite this

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abstract = "An elastohydrodynamic numerical simulation is conducted for one-dimensional Rayleigh step bearings. The numerical model incorporates the piezoviscous effect of the lubricant and the elastic deformation of the bounding surfaces to solve the one-dimensional Reynolds equation. It is found that a small elastic deformation of less than 200 nm is responsible for film formation in thin film hydrodynamic lubrication. As the film thickness decreases, the divergent shape in the step zone causes delay in pressure growth, resulting in considerable reduction of load capacity while the convergent shape in the land zone improves slightly load capacity in some cases. Rayleigh step bearings have higher load capacity than fixed plane bearings because of the remained step shape.",
author = "Kazuyuki Yagi and Joichi Sugimura",
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AU - Yagi, Kazuyuki

AU - Sugimura, Joichi

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N2 - An elastohydrodynamic numerical simulation is conducted for one-dimensional Rayleigh step bearings. The numerical model incorporates the piezoviscous effect of the lubricant and the elastic deformation of the bounding surfaces to solve the one-dimensional Reynolds equation. It is found that a small elastic deformation of less than 200 nm is responsible for film formation in thin film hydrodynamic lubrication. As the film thickness decreases, the divergent shape in the step zone causes delay in pressure growth, resulting in considerable reduction of load capacity while the convergent shape in the land zone improves slightly load capacity in some cases. Rayleigh step bearings have higher load capacity than fixed plane bearings because of the remained step shape.

AB - An elastohydrodynamic numerical simulation is conducted for one-dimensional Rayleigh step bearings. The numerical model incorporates the piezoviscous effect of the lubricant and the elastic deformation of the bounding surfaces to solve the one-dimensional Reynolds equation. It is found that a small elastic deformation of less than 200 nm is responsible for film formation in thin film hydrodynamic lubrication. As the film thickness decreases, the divergent shape in the step zone causes delay in pressure growth, resulting in considerable reduction of load capacity while the convergent shape in the land zone improves slightly load capacity in some cases. Rayleigh step bearings have higher load capacity than fixed plane bearings because of the remained step shape.

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