Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines

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

doi:doi:10.11648/j.ijmea.20140204.12

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Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines

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

Published in International Journal of Mechanical Engineering and Applications (Volume 2, Issue 4)

Received: 22 August 2014 Accepted: 9 September 2014 Published: 20 September 2014

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Abstract

Hydroinertia gas journal bearings have been applied to solid-state nuclear magnetic resonance (NMR) as an example. This type of bearing can realize a stable operation for the ultra-high-speed rotation of an NMR sample tube as high as several million rpm, because these bearings utilize a large radial clearance compared with conventional externally pressurized bearings. To obtain even higher rotational speeds, inclined supply holes in the direction of shaft rotation have been proposed. The characteristics of these proposed bearings are examined in this study by numerical analysis because the actual NMR sample rotor is thin and long (with a diameter of 1 mm to 4 mm). The numerical analysis results of the hydroinertia journal bearings are reported in this study. Variation of the pressure distribution and the load capacity with respect to the effect of the radial clearance and the angle of the supply holes are described. The results show that a negative pressure is generated at large radial clearance, and the load capacity does not affect the angle. The pressure distribution was experimentally verified using a test rig, which has 10 mm diameter rotor.

Published in	International Journal of Mechanical Engineering and Applications (Volume 2, Issue 4)
DOI	10.11648/j.ijmea.20140204.12
Page(s)	52-57
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), 2014. Published by Science Publishing Group

Keywords

High-Speed Rotary Machines, Hydroinertia Gas Bearing, Pressure Distribution, Negative Pressure

References

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[2]	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.
[3]	Isomura, K. et al., “Development of high-speed micro-gas bearings for three-dimensional micro-turbo machines,” Journal of Micromechanics and Microengineering, 15, 2005, S222-227.
[4]	S. Tanaka, K. Hikichi, S. Togo, M. Esashi, “Turbo test rig with hydroinertia air bearings for a palmtop gas turbine,” Journal of Micromechanics and Microengineering, Vol. 14, 2004, pp. 1449-1454.
[5]	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.
[6]	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.
[7]	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.
[8]	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.
[9]	S. Nakano, T. Ise, T. Asami, “Calculation of the Characteristics and its Verification of the Hydroinertia Gas Bearings with Inclined Supply Holes,” Proceedings of the 12th Machine Design and Tribology Division Meeting in JSME, 2012, pp. 79-80 (in Japanese).
[10]	J. Bennett, H. Marsh, “The Steady State and Dynamic Behavior of the Turbo-Bearing,” Proceedings of the 6th International Gas Bearing Symposium, 1974, Paper No. C4.
[11]	A. Tondl, “Bearings with a Tangential Gas Supply,” Proceedings of Gas Bearing Symposium, University of Southampton, 1967, Paper No. 4.
[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).
[15]	K. Czolczynski, Rotordynamics of Gas-Lubricated Journal Bearing Systems, 2010, Springer.

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APA Style

Tomohiko Ise, Sayuri Nakano, Toshihiko Asami, Yuki Endo, Itsuro Honda. (2014). Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines. International Journal of Mechanical Engineering and Applications, 2(4), 52-57. https://doi.org/10.11648/j.ijmea.20140204.12

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ACS Style

Tomohiko Ise; Sayuri Nakano; Toshihiko Asami; Yuki Endo; Itsuro Honda. Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines. Int. J. Mech. Eng. Appl. 2014, 2(4), 52-57. doi: 10.11648/j.ijmea.20140204.12

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AMA Style

Tomohiko Ise, Sayuri Nakano, Toshihiko Asami, Yuki Endo, Itsuro Honda. Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines. Int J Mech Eng Appl. 2014;2(4):52-57. doi: 10.11648/j.ijmea.20140204.12

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@article{10.11648/j.ijmea.20140204.12,
  author = {Tomohiko Ise and Sayuri Nakano and Toshihiko Asami and Yuki Endo and Itsuro Honda},
  title = {Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines},
  journal = {International Journal of Mechanical Engineering and Applications},
  volume = {2},
  number = {4},
  pages = {52-57},
  doi = {10.11648/j.ijmea.20140204.12},
  url = {https://doi.org/10.11648/j.ijmea.20140204.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmea.20140204.12},
  abstract = {Hydroinertia gas journal bearings have been applied to solid-state nuclear magnetic resonance (NMR) as an example. This type of bearing can realize a stable operation for the ultra-high-speed rotation of an NMR sample tube as high as several million rpm, because these bearings utilize a large radial clearance compared with conventional externally pressurized bearings. To obtain even higher rotational speeds, inclined supply holes in the direction of shaft rotation have been proposed. The characteristics of these proposed bearings are examined in this study by numerical analysis because the actual NMR sample rotor is thin and long (with a diameter of 1 mm to 4 mm). The numerical analysis results of the hydroinertia journal bearings are reported in this study. Variation of the pressure distribution and the load capacity with respect to the effect of the radial clearance and the angle of the supply holes are described. The results show that a negative pressure is generated at large radial clearance, and the load capacity does not affect the angle. The pressure distribution was experimentally verified using a test rig, which has 10 mm diameter rotor.},
 year = {2014}
}

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TY  - JOUR
T1  - Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines
AU  - Tomohiko Ise
AU  - Sayuri Nakano
AU  - Toshihiko Asami
AU  - Yuki Endo
AU  - Itsuro Honda
Y1  - 2014/09/20
PY  - 2014
N1  - https://doi.org/10.11648/j.ijmea.20140204.12
DO  - 10.11648/j.ijmea.20140204.12
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  - 52
EP  - 57
PB  - Science Publishing Group
SN  - 2330-0248
UR  - https://doi.org/10.11648/j.ijmea.20140204.12
AB  - Hydroinertia gas journal bearings have been applied to solid-state nuclear magnetic resonance (NMR) as an example. This type of bearing can realize a stable operation for the ultra-high-speed rotation of an NMR sample tube as high as several million rpm, because these bearings utilize a large radial clearance compared with conventional externally pressurized bearings. To obtain even higher rotational speeds, inclined supply holes in the direction of shaft rotation have been proposed. The characteristics of these proposed bearings are examined in this study by numerical analysis because the actual NMR sample rotor is thin and long (with a diameter of 1 mm to 4 mm). The numerical analysis results of the hydroinertia journal bearings are reported in this study. Variation of the pressure distribution and the load capacity with respect to the effect of the radial clearance and the angle of the supply holes are described. The results show that a negative pressure is generated at large radial clearance, and the load capacity does not affect the angle. The pressure distribution was experimentally verified using a test rig, which has 10 mm diameter rotor.
VL  - 2
IS  - 4
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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Plain Text BibTeX RIS

APA Style

Tomohiko Ise, Sayuri Nakano, Toshihiko Asami, Yuki Endo, Itsuro Honda. (2014). Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines. International Journal of Mechanical Engineering and Applications, 2(4), 52-57. https://doi.org/10.11648/j.ijmea.20140204.12

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ACS Style

Tomohiko Ise; Sayuri Nakano; Toshihiko Asami; Yuki Endo; Itsuro Honda. Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines. Int. J. Mech. Eng. Appl. 2014, 2(4), 52-57. doi: 10.11648/j.ijmea.20140204.12

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AMA Style

Tomohiko Ise, Sayuri Nakano, Toshihiko Asami, Yuki Endo, Itsuro Honda. Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines. Int J Mech Eng Appl. 2014;2(4):52-57. doi: 10.11648/j.ijmea.20140204.12

Copy | Download

@article{10.11648/j.ijmea.20140204.12,
  author = {Tomohiko Ise and Sayuri Nakano and Toshihiko Asami and Yuki Endo and Itsuro Honda},
  title = {Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines},
  journal = {International Journal of Mechanical Engineering and Applications},
  volume = {2},
  number = {4},
  pages = {52-57},
  doi = {10.11648/j.ijmea.20140204.12},
  url = {https://doi.org/10.11648/j.ijmea.20140204.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmea.20140204.12},
  abstract = {Hydroinertia gas journal bearings have been applied to solid-state nuclear magnetic resonance (NMR) as an example. This type of bearing can realize a stable operation for the ultra-high-speed rotation of an NMR sample tube as high as several million rpm, because these bearings utilize a large radial clearance compared with conventional externally pressurized bearings. To obtain even higher rotational speeds, inclined supply holes in the direction of shaft rotation have been proposed. The characteristics of these proposed bearings are examined in this study by numerical analysis because the actual NMR sample rotor is thin and long (with a diameter of 1 mm to 4 mm). The numerical analysis results of the hydroinertia journal bearings are reported in this study. Variation of the pressure distribution and the load capacity with respect to the effect of the radial clearance and the angle of the supply holes are described. The results show that a negative pressure is generated at large radial clearance, and the load capacity does not affect the angle. The pressure distribution was experimentally verified using a test rig, which has 10 mm diameter rotor.},
 year = {2014}
}

Copy | Download

TY  - JOUR
T1  - Numerical Analysis of Hydroinertia Gas Bearings with Inclined Supply Holes for High-Speed Rotary Machines
AU  - Tomohiko Ise
AU  - Sayuri Nakano
AU  - Toshihiko Asami
AU  - Yuki Endo
AU  - Itsuro Honda
Y1  - 2014/09/20
PY  - 2014
N1  - https://doi.org/10.11648/j.ijmea.20140204.12
DO  - 10.11648/j.ijmea.20140204.12
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  - 52
EP  - 57
PB  - Science Publishing Group
SN  - 2330-0248
UR  - https://doi.org/10.11648/j.ijmea.20140204.12
AB  - Hydroinertia gas journal bearings have been applied to solid-state nuclear magnetic resonance (NMR) as an example. This type of bearing can realize a stable operation for the ultra-high-speed rotation of an NMR sample tube as high as several million rpm, because these bearings utilize a large radial clearance compared with conventional externally pressurized bearings. To obtain even higher rotational speeds, inclined supply holes in the direction of shaft rotation have been proposed. The characteristics of these proposed bearings are examined in this study by numerical analysis because the actual NMR sample rotor is thin and long (with a diameter of 1 mm to 4 mm). The numerical analysis results of the hydroinertia journal bearings are reported in this study. Variation of the pressure distribution and the load capacity with respect to the effect of the radial clearance and the angle of the supply holes are described. The results show that a negative pressure is generated at large radial clearance, and the load capacity does not affect the angle. The pressure distribution was experimentally verified using a test rig, which has 10 mm diameter rotor.
VL  - 2
IS  - 4
ER  -

Copy | Download