Numerical Analysis of Influence on Gas Supply Hole Number and Radial Clearance for the Characteristics of Hydroinertia Gas Journal Bearings

Tomohiko Ise; Sayuri Nakano; Toshihiko Asami; Yuki Endo; Itsuro Honda

doi:doi:10.11648/j.ijmea.20150301.13

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Numerical Analysis of Influence on Gas Supply Hole Number and Radial Clearance for the Characteristics of Hydroinertia Gas Journal Bearings

Tomohiko Ise, Sayuri Nakano, Toshihiko Asami, Yuki Endo, Itsuro Honda

Published in International Journal of Mechanical Engineering and Applications (Volume 3, Issue 1)

Received: 12 November 2014 Accepted: 21 November 2014 Published: 28 February 2015

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Abstract

Hydroinertia gas journal bearings have been applied to solid state nuclear magnetic resonance spectroscopy. These bearings, which require a larger radial clearance than conventional externally pressurized bearings, achieve stable operation for ultra high-speed rotation of spinner shaft at several million rpm. However, their small diameters, which range within 1-6 mm, have limited experimental verifications of their static characteristics. A computational fluid dynamics analysis was therefore performed to fill this gap. The effects of radial clearance and gas supply hole number on bearing characteristics, such as pressure distribution and load capacity, were investigated. This analysis showed that negative and positive pressures generated some clearance. Pressure distribution also changes in the gas supply hole number. A large load capacity was obtained at this clearance. To verify the phenomenon, measurement of pressure distribution was performed using experimental setup. Negative pressure could be confirmed actually in the large radial clearance condition.

Published in	International Journal of Mechanical Engineering and Applications (Volume 3, Issue 1)
DOI	10.11648/j.ijmea.20150301.13
Page(s)	16-21
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Ultra-High-Speed Rotary Machines, Hydroinertia Gas Journal Bearing, Pressure Distribution, Negative Pressure, Load Capacity

References

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[2]	K. Hioka, "Development of Ultra High-Speed 4 Million rpm Hydroinertia Gas Bearing for NMR Equipment." Journal of Japanese Society of Tribologists, Vol.56, No.3, 2011, pp. 143-148, (in Japanese).
[3]	S. Tanaka, K. Hikichi. "Ultra High-Speed Gas Bearings for Ultra-Small Turbomachinery." Journal of Japanese Society of Tribologists, Vol.56, No.3, 2011, pp.137-142, (in Japanese).
[4]	K. Hikichi, K. Shiratori, S. Togo, K. Hikoka, “Hydroinertia Gas Bearings and Their Application to High Speed Micro Spinners,” Journal of the Japanese Society of Tribologists, Vol. 50, No. 6, 2005, pp. 465-470, (in Japanese).
[5]	K. Hikichi, S. Goto, S. Togo, S. Tanaka, K. Isomura, “Hydroinertia gas bearings for micro spinners,” Journal of Micromechanics and Microengineering, Vol. 15, 2005, pp. 228-232.
[6]	K. Isomura, S. Togo, K. Hikichi, S. Goto, S. Tanaka, “Analytical and Experimental Study of Hydroinertia Gas Bearings for micromachine Gasturbines,” Proceedings of ASME Turbo Expo 2005, 2005, No. GT2005-68401.
[7]	K. Isomura, S. Tanaka, S. Togo, M. Esashi, “Development of high-speed micro-gas bearings for three-dimensional micro-turbo machines,” Journal of Micromechanics and Microengineering, 15, 2005, S222-227.
[8]	S. Tanaka, K. Hikichi, S. Togo, M. Esashi, “Turbo test rigwith hydroinertia air bearings for a palmtop gas turbine,” Journal of Micromechanics and Microengineering, Vol. 14, 2004, pp. 1449-1454.
[9]	S. Tanaka, M. Esashi, K. Isomura, K. Hikichi, Y. Endo, S.Togo, “Hydroinertia Gas Bearing System to Achieve 470 m per sec Tip Speed of 10 mm-Diameter Impellers,” Transactions of ASME, Journal of Tribology, Vol. 129, 2007, pp. 655-659.
[10]	T. Waumans, J. Peirs, F. Al-Bender, D. Reynaerts, “Aerodynamic journal bearing with a flexible, damped support operating at 7.2 million DN”, Journal of Micromechanics and Microengineering, Vol.21, No,10, 2011, No.104014.
[11]	S. Yoshimoto, M. Yamamoto, K. Toda, “Numerical Calculations of Pressure Distribution in the Bearing Clearance of Circular Aerostatic Thrust Bearings with a Single Air Supply Inlet,” Transactions of ASME, Journal of Tribology, Vol. 129, Issue 2, 2007, pp. 384-390.
[12]	H. Yabe, “A study on Run-out Characteristics of Externally pressurized Gas Journal Bearing (1st Report, Modified DF Method for Point-Source Solution),” Transactions of the Japan Society of Mechanical Engineers Series C, 1992, Vol. 58, No. 548, pp. 1170-1176 (in Japanese with English abstract).
[13]	S. Togo, Gas Bearing Design Guide Book, 2002, Kyoritsu Shuppan Co., Ltd. (in Japanese).
[14]	S. Togo, I. Kawashima, T. Ise, K. Hikichi, Y. Endo, T. Maeda, Gas Bearing - Technics of design and operation and production-, 2014, Kyoritsu Shuppan Co., Ltd. (in Japanese).

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APA Style

Tomohiko Ise, Sayuri Nakano, Toshihiko Asami, Yuki Endo, Itsuro Honda. (2015). Numerical Analysis of Influence on Gas Supply Hole Number and Radial Clearance for the Characteristics of Hydroinertia Gas Journal Bearings. International Journal of Mechanical Engineering and Applications, 3(1), 16-21. https://doi.org/10.11648/j.ijmea.20150301.13

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ACS Style

Tomohiko Ise; Sayuri Nakano; Toshihiko Asami; Yuki Endo; Itsuro Honda. Numerical Analysis of Influence on Gas Supply Hole Number and Radial Clearance for the Characteristics of Hydroinertia Gas Journal Bearings. Int. J. Mech. Eng. Appl. 2015, 3(1), 16-21. doi: 10.11648/j.ijmea.20150301.13

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AMA Style

Tomohiko Ise, Sayuri Nakano, Toshihiko Asami, Yuki Endo, Itsuro Honda. Numerical Analysis of Influence on Gas Supply Hole Number and Radial Clearance for the Characteristics of Hydroinertia Gas Journal Bearings. Int J Mech Eng Appl. 2015;3(1):16-21. doi: 10.11648/j.ijmea.20150301.13

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@article{10.11648/j.ijmea.20150301.13,
  author = {Tomohiko Ise and Sayuri Nakano and Toshihiko Asami and Yuki Endo and Itsuro Honda},
  title = {Numerical Analysis of Influence on Gas Supply Hole Number and Radial Clearance for the Characteristics of Hydroinertia Gas Journal Bearings},
  journal = {International Journal of Mechanical Engineering and Applications},
  volume = {3},
  number = {1},
  pages = {16-21},
  doi = {10.11648/j.ijmea.20150301.13},
  url = {https://doi.org/10.11648/j.ijmea.20150301.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmea.20150301.13},
  abstract = {Hydroinertia gas journal bearings have been applied to solid state nuclear magnetic resonance spectroscopy. These bearings, which require a larger radial clearance than conventional externally pressurized bearings, achieve stable operation for ultra high-speed rotation of spinner shaft at several million rpm. However, their small diameters, which range within 1-6 mm, have limited experimental verifications of their static characteristics. A computational fluid dynamics analysis was therefore performed to fill this gap. The effects of radial clearance and gas supply hole number on bearing characteristics, such as pressure distribution and load capacity, were investigated. This analysis showed that negative and positive pressures generated some clearance. Pressure distribution also changes in the gas supply hole number. A large load capacity was obtained at this clearance. To verify the phenomenon, measurement of pressure distribution was performed using experimental setup. Negative pressure could be confirmed actually in the large radial clearance condition.},
 year = {2015}
}

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TY - JOUR
T1 - Numerical Analysis of Influence on Gas Supply Hole Number and Radial Clearance for the Characteristics of Hydroinertia Gas Journal Bearings
AU - Tomohiko Ise
AU - Sayuri Nakano
AU - Toshihiko Asami
AU - Yuki Endo
AU - Itsuro Honda
Y1 - 2015/02/28
PY - 2015
N1 - https://doi.org/10.11648/j.ijmea.20150301.13
DO - 10.11648/j.ijmea.20150301.13
T2 - International Journal of Mechanical Engineering and Applications
JF - International Journal of Mechanical Engineering and Applications
JO - International Journal of Mechanical Engineering and Applications
SP - 16
EP - 21
PB - Science Publishing Group
SN - 2330-0248
UR - https://doi.org/10.11648/j.ijmea.20150301.13
AB - Hydroinertia gas journal bearings have been applied to solid state nuclear magnetic resonance spectroscopy. These bearings, which require a larger radial clearance than conventional externally pressurized bearings, achieve stable operation for ultra high-speed rotation of spinner shaft at several million rpm. However, their small diameters, which range within 1-6 mm, have limited experimental verifications of their static characteristics. A computational fluid dynamics analysis was therefore performed to fill this gap. The effects of radial clearance and gas supply hole number on bearing characteristics, such as pressure distribution and load capacity, were investigated. This analysis showed that negative and positive pressures generated some clearance. Pressure distribution also changes in the gas supply hole number. A large load capacity was obtained at this clearance. To verify the phenomenon, measurement of pressure distribution was performed using experimental setup. Negative pressure could be confirmed actually in the large radial clearance condition.
VL - 3
IS - 1
ER -

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Author Information

Tomohiko Ise

Graduate School of Mechanical Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan
Sayuri Nakano

Graduate School of Mechanical Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan
Toshihiko Asami

Graduate School of Mechanical Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan
Yuki Endo

JEOL RESONANCE Inc., 1-2, Musashino 3-Chome, Akishima, Tokyo 196-8558, Japan
Itsuro Honda

Graduate School of Mechanical Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan

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APA Style

Tomohiko Ise, Sayuri Nakano, Toshihiko Asami, Yuki Endo, Itsuro Honda. (2015). Numerical Analysis of Influence on Gas Supply Hole Number and Radial Clearance for the Characteristics of Hydroinertia Gas Journal Bearings. International Journal of Mechanical Engineering and Applications, 3(1), 16-21. https://doi.org/10.11648/j.ijmea.20150301.13

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ACS Style

Tomohiko Ise; Sayuri Nakano; Toshihiko Asami; Yuki Endo; Itsuro Honda. Numerical Analysis of Influence on Gas Supply Hole Number and Radial Clearance for the Characteristics of Hydroinertia Gas Journal Bearings. Int. J. Mech. Eng. Appl. 2015, 3(1), 16-21. doi: 10.11648/j.ijmea.20150301.13

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AMA Style

Tomohiko Ise, Sayuri Nakano, Toshihiko Asami, Yuki Endo, Itsuro Honda. Numerical Analysis of Influence on Gas Supply Hole Number and Radial Clearance for the Characteristics of Hydroinertia Gas Journal Bearings. Int J Mech Eng Appl. 2015;3(1):16-21. doi: 10.11648/j.ijmea.20150301.13

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@article{10.11648/j.ijmea.20150301.13,
  author = {Tomohiko Ise and Sayuri Nakano and Toshihiko Asami and Yuki Endo and Itsuro Honda},
  title = {Numerical Analysis of Influence on Gas Supply Hole Number and Radial Clearance for the Characteristics of Hydroinertia Gas Journal Bearings},
  journal = {International Journal of Mechanical Engineering and Applications},
  volume = {3},
  number = {1},
  pages = {16-21},
  doi = {10.11648/j.ijmea.20150301.13},
  url = {https://doi.org/10.11648/j.ijmea.20150301.13},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmea.20150301.13},
  abstract = {Hydroinertia gas journal bearings have been applied to solid state nuclear magnetic resonance spectroscopy. These bearings, which require a larger radial clearance than conventional externally pressurized bearings, achieve stable operation for ultra high-speed rotation of spinner shaft at several million rpm. However, their small diameters, which range within 1-6 mm, have limited experimental verifications of their static characteristics. A computational fluid dynamics analysis was therefore performed to fill this gap. The effects of radial clearance and gas supply hole number on bearing characteristics, such as pressure distribution and load capacity, were investigated. This analysis showed that negative and positive pressures generated some clearance. Pressure distribution also changes in the gas supply hole number. A large load capacity was obtained at this clearance. To verify the phenomenon, measurement of pressure distribution was performed using experimental setup. Negative pressure could be confirmed actually in the large radial clearance condition.},
 year = {2015}
}

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