A Thermal Elastohydrodynamic Lubrication Model for Crowned Rollers and Its Application on Apex Seal-Housing Interfaces

Zhong Liu, David Pickens, Tao He, Xin Zhang, Yuchuan Liu, Takayuki Nishino, Q. Jane Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

This paper presents a thermal elastohydrodynamic lubrication (EHL) model for analyzing crowned roller lubrication performances under the influence of frictional heating. In this thermal EHL model, the Reynolds equation is solved to obtain the film thickness and pressure results while the energy equation and temperature integration equation are evaluated for the temperature rise in the lubricant and at the surfaces. The discrete convolution fast Fourier transform (DC-FFT) method is utilized to calculate the influence coefficients for both the elastic deformation and the temperature integration equations. The influences of the slide-to-roll ratio (SRR), load, crowning radius, and roller length on the roller lubrication and temperature rise are investigated. The results indicate that the thermal effect becomes significant for the cases with high SRRs or heavy loads. The proposed thermal EHL model is used to study the thermal-tribology behavior of an apex seal housing interface in a rotary engine, and to assist the design of the apex seal crown geometry. A simplified crown design equation is obtained from the analysis results, validated through comparison with the optimal results calculated using the current crownedroller thermo-EHL (TEHL) model.

Original languageEnglish (US)
Article number041501
JournalJournal of Tribology
Volume141
Issue number4
DOIs
StatePublished - Apr 1 2019

Keywords

  • Roller contact
  • crowned surface
  • thermal elastohydrodynamic lubrication (TEHL)

ASJC Scopus subject areas

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

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