Evaluation of Lubrication Performance of Foil Bearings with New Texturing
Foil bearings have excellent characteristics such as a high damping performance and acceptable dimensional changes caused by installation errors and thermal expansion. However, the problem of large friction losses also occurs at the top foil under the high rotational speed required to support a shaf...
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Japanese Society of Tribologists
2019
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oai:doaj.org-article:2feb25f0c6b148e5992ff0b1e74dadb22021-11-05T09:17:25ZEvaluation of Lubrication Performance of Foil Bearings with New Texturing1881-219810.2474/trol.14.339https://doaj.org/article/2feb25f0c6b148e5992ff0b1e74dadb22019-12-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/trol/14/5/14_339/_pdf/-char/enhttps://doaj.org/toc/1881-2198Foil bearings have excellent characteristics such as a high damping performance and acceptable dimensional changes caused by installation errors and thermal expansion. However, the problem of large friction losses also occurs at the top foil under the high rotational speed required to support a shaft without any contact. In this paper, a new type of foil bearing with a surface texture on the top foil is proposed. The effects of the texture were verified by the rotational motion experimental analysis under a high circumferential speed and dry lubrication. For a bearing with dimples on the contact area, the effect of friction reduction could be observed under boundary lubrication. Moreover, it was also confirmed that the dimples adversely affected the air film formation with the sliding speed increase. For a newly designed F-grooved model, the phenomenon of an early transition from boundary lubrication to fluid lubrication can be seen. However, the friction coefficient increases at the boundary lubrication. In this study, it was also the highest friction reduction effect was confirmed at the maximum sliding speed. Furthermore, an additional friction reduction effect and a small temperature rise were obtained by combining the above textures.Hyuga KikuchiMohd Danial IbrahimMasayuki OchiaiJapanese Society of Tribologistsarticletexturingfoil bearingfibonacci groovedimpledry lubricationhigh sliding speedfluid lubricationmixed lubricationboundary lubricationPhysicsQC1-999Engineering (General). Civil engineering (General)TA1-2040Mechanical engineering and machineryTJ1-1570ChemistryQD1-999ENTribology Online, Vol 14, Iss 5, Pp 339-344 (2019) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
texturing foil bearing fibonacci groove dimple dry lubrication high sliding speed fluid lubrication mixed lubrication boundary lubrication Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 |
| spellingShingle |
texturing foil bearing fibonacci groove dimple dry lubrication high sliding speed fluid lubrication mixed lubrication boundary lubrication Physics QC1-999 Engineering (General). Civil engineering (General) TA1-2040 Mechanical engineering and machinery TJ1-1570 Chemistry QD1-999 Hyuga Kikuchi Mohd Danial Ibrahim Masayuki Ochiai Evaluation of Lubrication Performance of Foil Bearings with New Texturing |
| description |
Foil bearings have excellent characteristics such as a high damping performance and acceptable dimensional changes caused by installation errors and thermal expansion. However, the problem of large friction losses also occurs at the top foil under the high rotational speed required to support a shaft without any contact. In this paper, a new type of foil bearing with a surface texture on the top foil is proposed. The effects of the texture were verified by the rotational motion experimental analysis under a high circumferential speed and dry lubrication. For a bearing with dimples on the contact area, the effect of friction reduction could be observed under boundary lubrication. Moreover, it was also confirmed that the dimples adversely affected the air film formation with the sliding speed increase. For a newly designed F-grooved model, the phenomenon of an early transition from boundary lubrication to fluid lubrication can be seen. However, the friction coefficient increases at the boundary lubrication. In this study, it was also the highest friction reduction effect was confirmed at the maximum sliding speed. Furthermore, an additional friction reduction effect and a small temperature rise were obtained by combining the above textures. |
| format |
article |
| author |
Hyuga Kikuchi Mohd Danial Ibrahim Masayuki Ochiai |
| author_facet |
Hyuga Kikuchi Mohd Danial Ibrahim Masayuki Ochiai |
| author_sort |
Hyuga Kikuchi |
| title |
Evaluation of Lubrication Performance of Foil Bearings with New Texturing |
| title_short |
Evaluation of Lubrication Performance of Foil Bearings with New Texturing |
| title_full |
Evaluation of Lubrication Performance of Foil Bearings with New Texturing |
| title_fullStr |
Evaluation of Lubrication Performance of Foil Bearings with New Texturing |
| title_full_unstemmed |
Evaluation of Lubrication Performance of Foil Bearings with New Texturing |
| title_sort |
evaluation of lubrication performance of foil bearings with new texturing |
| publisher |
Japanese Society of Tribologists |
| publishDate |
2019 |
| url |
https://doaj.org/article/2feb25f0c6b148e5992ff0b1e74dadb2 |
| work_keys_str_mv |
AT hyugakikuchi evaluationoflubricationperformanceoffoilbearingswithnewtexturing AT mohddanialibrahim evaluationoflubricationperformanceoffoilbearingswithnewtexturing AT masayukiochiai evaluationoflubricationperformanceoffoilbearingswithnewtexturing |
| _version_ |
1718444400612212736 |