Surface Roughness Effect on Elastohytrodynamic Lubrication Point Contact Considering Dynamic Change of Interface Roughness

SHEN Jinlong; XU Jimin; JIAO Yunlong; LIU Kun; LIU Xiaojun

doi:10.16078/j.tribology.2019138

TRIBOLOGY > 2021 > 41(1): 47-55. > DOI: 10.16078/j.tribology.2019138

SHEN Jinlong, XU Jimin, JIAO Yunlong, LIU Kun, LIU Xiaojun. Surface Roughness Effect on Elastohytrodynamic Lubrication Point Contact Considering Dynamic Change of Interface Roughness[J]. TRIBOLOGY, 2021, 41(1): 47-55. DOI: 10.16078/j.tribology.2019138

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Surface Roughness Effect on Elastohytrodynamic Lubrication Point Contact Considering Dynamic Change of Interface Roughness

1.
Institute of Tribology, Hefei University of Technology, Anhui Hefei 230009, China
2.
Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Anhui Hefei 230026, China

Funds: The project was supported by the National Natural Science Foundation of China (51875152) and the Youth Program of National Natural Science Foundation of China(51805508)

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Corresponding author:
LIU Xiaojun, E-mail: liuxjunhf@163.com, Tel: +86-13965129642
Received Date: July 24, 2019
Revised Date: June 01, 2020
Accepted Date: June 23, 2020
Available Online: January 07, 2021
Published Date: January 27, 2021

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Abstract

Abstract

A fast rough EHL point contact method considering dynamic change of roughness has been established to study the rougness effect in EHL point contact. Qualitative and quantitative analysis then was carried out to discuss the influences of load, speed, slip ratio and RMS roughness on the maximum contact stress and minimum film thickness. The results showed that, surface roughness changed the shape of pressure distribution and film thickness. In general, the maximum contact pressure was increased and the minimum film thickness was reduced comparing with results under smooth condition. The effect of surface roughness on film thickness was more significant under low load condition. The influence of roughness at different velocities was basically the same and shows a linear trend of change. The film thickness ratio increased firstly and then decreased with the increase of load, and reached its peak at about 25 N.
- poitnt EHL,
- surface topography,
- dynamic change of roughness,
- slip ratio,
- film thickness ratio

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