|
|||||
|
|
Experimental and numerical investigation on the behavior of transverse limited micro-grooves in EHL point contacts |
|
| Affiliation: | 1. Institute for Machine Elements and Machine Design, RWTH Aachen, Germany;2. Chair of Functional Materials, Department of Material Science and Engineering, Saarland University, Germany;3. Institute for Engineering Design and Logistics Engineering, TU Vienna, Austria;1. Department of Mechanical Engineering, Laboratory of Surface Phenomena (LFS), Polytechnic School of the University of São Paulo, São Paulo, Brazil;2. Department of Mechanical Engineering, Imperial College London, South Kensington Campus, London, UK;1. Universiteit Twente, Enschede, The Netherlands;2. Qingdao Technological University, Qingdao, PR China;3. Université de Lyon, INSA-Lyon, LaMCoS, CNRS UMR 5259, Villeurbanne F69621, France;1. School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China;2. 713rd Research Institute of China Shipbuilding Industry Corp, Zhengzhou 450015, China |
| Abstract: | This study presents experimental and numerical investigations on the effects of transverse limited micro-grooves on the behavior of film thickness and friction in EHL point contacts. The tribological performance has been compared for smooth and textured surfaces in sliding and reciprocating motion and under starvation. The measurements were conducted by using a ball-on-disk tribometer equipped with a high speed camera and torque sensor. The results show that the transverse shallow micro-grooves with a length less than the diameter of the Hertzian contact are efficiently able to enhance the film thickness under different operating conditions. The beneficial effect under starved lubrication requires a mechanism for filling the depleted micro-grooves entering the contact with fresh lubricant. This mechanism can be attributed to the capillary effect in the inlet zone under starvation. The numerical simulation of the transient behavior of transverse limited micro-grooves shows agreement with experimental results. On the other hand, introducing micro-grooves as closed texture cells on one of rubbing surfaces results in a friction reduction in the reciprocating motion. The reduction of friction is substantially attributed to the film thickness enhancement. |
| Keywords: | Elastohydrodynamic (EHL) Limited micro-grooves Film thickness Reciprocating motion |
| 本文献已被 ScienceDirect 等数据库收录！ | |