Experimental verification of externally pressurized gas journal bearings with asymmetric gas supply (Supply gas pressure control operation using a small size test rig)
Externally pressurized gas journal bearings with an asymmetric gas supply mechanism have been developed by one of the authors. This bearing has a large load capacity compared with conventional symmetric gas supply bearings because low and high pressurized gases are supplied to loaded and counter-loa...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2014-09-01
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| Series: | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jamdsm/8/3/8_2014jamdsm0029/_pdf/-char/en |
| _version_ | 1828191670027419648 |
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| author | Tomohiko ISE Kazuya IMANISHI Toshihiko ASAMI Takahiro TOKUMIYA Naoyuki TAKADA Fumiyoshi KIMURA Yoshiyuki YAMAGUCHI |
| author_facet | Tomohiko ISE Kazuya IMANISHI Toshihiko ASAMI Takahiro TOKUMIYA Naoyuki TAKADA Fumiyoshi KIMURA Yoshiyuki YAMAGUCHI |
| author_sort | Tomohiko ISE |
| collection | DOAJ |
| description | Externally pressurized gas journal bearings with an asymmetric gas supply mechanism have been developed by one of the authors. This bearing has a large load capacity compared with conventional symmetric gas supply bearings because low and high pressurized gases are supplied to loaded and counter-loaded side bearing surfaces, respectively. It has been proposed that this type of bearing has advantageous characteristics applicable for use in a general purpose X-ray computed tomography scanner gantry. The adaptation of this gas bearing to the device can conceivably contribute to an improved performance by increasing the rotational speed and decreasing the operating noise. This is effective for higher precision scanning and for reduction of the level of stress on a patient. Numerical calculations of this bearing were conducted and the resulting characteristics were compared with those of a conventional symmetric supply gas journal bearing. The effectiveness of the bearing for this application was demonstrated by conducting rotation tests using a small size test rig. The bearing diameter and length were 60 and 120 mm, respectively. The test bearing was operated under supply gas pressure controlled conditions. The rotor vibration amplitude decreased under the controlled pressure supply conditions, although the amplitude increased under conventional symmetric gas supply conditions with an increase in rotational frequency. The gas flow rate decreased by 21.4% under controlled supply pressure conditions compared with conventional supply pressure conditions. The rotor of the test rig was safely supported by this bearing, and effective data for the practical operation was obtained. |
| first_indexed | 2024-04-12T08:42:44Z |
| format | Article |
| id | doaj.art-66e4f7a700c44812bc8502eb125630f2 |
| institution | Directory Open Access Journal |
| issn | 1881-3054 |
| language | English |
| last_indexed | 2024-04-12T08:42:44Z |
| publishDate | 2014-09-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| spelling | doaj.art-66e4f7a700c44812bc8502eb125630f22022-12-22T03:39:49ZengThe Japan Society of Mechanical EngineersJournal of Advanced Mechanical Design, Systems, and Manufacturing1881-30542014-09-0183JAMDSM0029JAMDSM002910.1299/jamdsm.2014jamdsm0029jamdsmExperimental verification of externally pressurized gas journal bearings with asymmetric gas supply (Supply gas pressure control operation using a small size test rig)Tomohiko ISE0Kazuya IMANISHI1Toshihiko ASAMI2Takahiro TOKUMIYA3Naoyuki TAKADA4Fumiyoshi KIMURA5Yoshiyuki YAMAGUCHI6Department of Mechanical and System Engineering, University of HyogoDepartment of Mechanical and System Engineering, University of HyogoDepartment of Mechanical and System Engineering, University of HyogoSamsung R&D Institute Japan Co. Ltd.Samsung R&D Institute Japan Co. Ltd.Department of Mechanical and System Engineering, University of HyogoDepartment of Mechanical and System Engineering, University of HyogoExternally pressurized gas journal bearings with an asymmetric gas supply mechanism have been developed by one of the authors. This bearing has a large load capacity compared with conventional symmetric gas supply bearings because low and high pressurized gases are supplied to loaded and counter-loaded side bearing surfaces, respectively. It has been proposed that this type of bearing has advantageous characteristics applicable for use in a general purpose X-ray computed tomography scanner gantry. The adaptation of this gas bearing to the device can conceivably contribute to an improved performance by increasing the rotational speed and decreasing the operating noise. This is effective for higher precision scanning and for reduction of the level of stress on a patient. Numerical calculations of this bearing were conducted and the resulting characteristics were compared with those of a conventional symmetric supply gas journal bearing. The effectiveness of the bearing for this application was demonstrated by conducting rotation tests using a small size test rig. The bearing diameter and length were 60 and 120 mm, respectively. The test bearing was operated under supply gas pressure controlled conditions. The rotor vibration amplitude decreased under the controlled pressure supply conditions, although the amplitude increased under conventional symmetric gas supply conditions with an increase in rotational frequency. The gas flow rate decreased by 21.4% under controlled supply pressure conditions compared with conventional supply pressure conditions. The rotor of the test rig was safely supported by this bearing, and effective data for the practical operation was obtained.https://www.jstage.jst.go.jp/article/jamdsm/8/3/8_2014jamdsm0029/_pdf/-char/enexternally pressurized gas bearingslarge load rotorload capacitygas flow ratepressure controlx-ray ct gantry |
| spellingShingle | Tomohiko ISE Kazuya IMANISHI Toshihiko ASAMI Takahiro TOKUMIYA Naoyuki TAKADA Fumiyoshi KIMURA Yoshiyuki YAMAGUCHI Experimental verification of externally pressurized gas journal bearings with asymmetric gas supply (Supply gas pressure control operation using a small size test rig) Journal of Advanced Mechanical Design, Systems, and Manufacturing externally pressurized gas bearings large load rotor load capacity gas flow rate pressure control x-ray ct gantry |
| title | Experimental verification of externally pressurized gas journal bearings with asymmetric gas supply (Supply gas pressure control operation using a small size test rig) |
| title_full | Experimental verification of externally pressurized gas journal bearings with asymmetric gas supply (Supply gas pressure control operation using a small size test rig) |
| title_fullStr | Experimental verification of externally pressurized gas journal bearings with asymmetric gas supply (Supply gas pressure control operation using a small size test rig) |
| title_full_unstemmed | Experimental verification of externally pressurized gas journal bearings with asymmetric gas supply (Supply gas pressure control operation using a small size test rig) |
| title_short | Experimental verification of externally pressurized gas journal bearings with asymmetric gas supply (Supply gas pressure control operation using a small size test rig) |
| title_sort | experimental verification of externally pressurized gas journal bearings with asymmetric gas supply supply gas pressure control operation using a small size test rig |
| topic | externally pressurized gas bearings large load rotor load capacity gas flow rate pressure control x-ray ct gantry |
| url | https://www.jstage.jst.go.jp/article/jamdsm/8/3/8_2014jamdsm0029/_pdf/-char/en |
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