This paper introduces a design and manufacturing of mesoscale flexure pivot tilting pad gas bearing with a diameter of 5 mm and a length of 1–2.5 mm for PowerMEMS (micro electromechanical systems for power generation) applications with power ranges of 100–200 W. Potential applications include power source for unmanned air vehicles, small robots, microgas turbines to be harnessed by very small solid oxide fuel cells, microblowers/compressors for microfuel cells, etc. The design studies involve scaling analysis, time-domain orbit simulations for stability analyses, and frequency-domain modal analyses for prediction of rotor-bearing natural frequencies. Scaling analysis indicates that direct miniaturization of macroscale tilting pad gas bearing can result in a large bearing number, which may render the rotor-bearing system unstable. However, the scaling analysis provides the baseline design from which the final design can be derived considering manufacturing issue. The generalized modal analysis using impedance contours predict damped natural frequencies close to those from orbit simulations, providing high fidelity to the developed numerical methods. It was predicted that the designed mesoscale tilting pad gas bearings would show very stable operation up to a maximum simulated speed of 1,000,000 rpm. The designed mesoscale tilting pad gas bearings were manufactured using X-ray lithography and electroplating.
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July 2009
Research Papers
Design and Manufacturing of Mesoscale Tilting Pad Gas Bearings for 100–200 W Class PowerMEMS Applications
Daejong Kim,
Daejong Kim
Mechanical and Aerospace Engineering,
e-mail: daejongkim@uta.edu
University of Texas at Arlington
, 500 West First Street, Woolf Hall, Arlington, TX 76019
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Aaron M. Rimpel,
Aaron M. Rimpel
Department of Mechanical Engineering,
Texas A&M University
, 3123 TAMU, College Station, TX 77843
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Suk Sang Chang,
Suk Sang Chang
Pohang Accelerator Laboratory,
POSTECH
, San31 Hyojadong, Pohang 790-784, Republic of Korea
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Jong Hyun Kim
Jong Hyun Kim
Pohang Accelerator Laboratory,
POSTECH
, San31 Hyojadong, Pohang 790-784, Republic of Korea
Search for other works by this author on:
Daejong Kim
Mechanical and Aerospace Engineering,
University of Texas at Arlington
, 500 West First Street, Woolf Hall, Arlington, TX 76019e-mail: daejongkim@uta.edu
Aaron M. Rimpel
Department of Mechanical Engineering,
Texas A&M University
, 3123 TAMU, College Station, TX 77843
Suk Sang Chang
Pohang Accelerator Laboratory,
POSTECH
, San31 Hyojadong, Pohang 790-784, Republic of Korea
Jong Hyun Kim
Pohang Accelerator Laboratory,
POSTECH
, San31 Hyojadong, Pohang 790-784, Republic of KoreaJ. Eng. Gas Turbines Power. Jul 2009, 131(4): 042503 (11 pages)
Published Online: April 10, 2009
Article history
Received:
December 16, 2007
Revised:
October 27, 2008
Published:
April 10, 2009
Citation
Kim, D., Rimpel, A. M., Chang, S. S., and Kim, J. H. (April 10, 2009). "Design and Manufacturing of Mesoscale Tilting Pad Gas Bearings for 100–200 W Class PowerMEMS Applications." ASME. J. Eng. Gas Turbines Power. July 2009; 131(4): 042503. https://doi.org/10.1115/1.3077646
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