To obtain the foil bearing characteristics, the fluid film pressure must be coupled with the elastic deformation of the foil structure. However, all of the structural models thus far have simplified the foil structure without consideration of its three-dimensional shape. In this study, a finite element foil structural model is proposed that takes into consideration the three-dimensional foil shape. Using the proposed model, the deflections of interconnected bumps are compared to those of separated bumps, and the minimum film thickness determined from the proposed structural models is compared to those of previous models. In addition, the effects of the top foil and bump foil thickness on the foil bearing static performance are evaluated. The results of the study show that the three-dimensional shape of the foil structure should be considered for accurate predictions of foil bearing performances and that too thin top foil or bump foil thickness may lead to a significant decrease in the load capacity. In addition, the foil stiffness variation does not increase the load capacity much under a simple foil structure.
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e-mail: dhyun@kaist.ac.kr
e-mail: kyc@kimm.re.kr
e-mail: taeho@kaist.ac.kr
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July 2008
Research Papers
The Static Performance Analysis of Foil Journal Bearings Considering Three-Dimensional Shape of the Foil Structure
Dong-Hyun Lee,
Dong-Hyun Lee
School of Mechanical, Aerospace & Systems Engineering,
e-mail: dhyun@kaist.ac.kr
Korea Advanced Institute of Science and Technology (KAIST)
, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Korea
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Young-Cheol Kim,
e-mail: kyc@kimm.re.kr
Young-Cheol Kim
Korea Institute of Machinery and Materials (KIMM)
, 17 Jang-Dong, Yuseong-Gu, Daejeon 305-343, Republic of Korea
Search for other works by this author on:
Kyung-Woong Kim
Kyung-Woong Kim
School of Mechanical, Aerospace & Systems Engineering,
e-mail: taeho@kaist.ac.kr
Korea Advanced Institute of Science and Technology (KAIST)
, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Korea
Search for other works by this author on:
Dong-Hyun Lee
School of Mechanical, Aerospace & Systems Engineering,
Korea Advanced Institute of Science and Technology (KAIST)
, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Koreae-mail: dhyun@kaist.ac.kr
Young-Cheol Kim
Korea Institute of Machinery and Materials (KIMM)
, 17 Jang-Dong, Yuseong-Gu, Daejeon 305-343, Republic of Koreae-mail: kyc@kimm.re.kr
Kyung-Woong Kim
School of Mechanical, Aerospace & Systems Engineering,
Korea Advanced Institute of Science and Technology (KAIST)
, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Koreae-mail: taeho@kaist.ac.kr
J. Tribol. Jul 2008, 130(3): 031102 (10 pages)
Published Online: June 23, 2008
Article history
Received:
November 20, 2007
Revised:
March 24, 2008
Published:
June 23, 2008
Citation
Lee, D., Kim, Y., and Kim, K. (June 23, 2008). "The Static Performance Analysis of Foil Journal Bearings Considering Three-Dimensional Shape of the Foil Structure." ASME. J. Tribol. July 2008; 130(3): 031102. https://doi.org/10.1115/1.2913538
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