Application of multi-leaf foil bearings in high-speed turbo-machinery
Foil bearings, featuring various advantages (such as high-speed, good operation stability, low friction, long life, strong adaptability, wide temperature range, and oil-free), are promised to have good development prospects and application in high-speed centrifugal machinery. In order to evaluate th...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2020-07-01
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| Series: | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jamdsm/14/6/14_2020jamdsm0085/_pdf/-char/en |
| _version_ | 1818532656728506368 |
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| author | Yu GUO Yu HOU Qi ZHAO Xionghao REN Tianwei LAI |
| author_facet | Yu GUO Yu HOU Qi ZHAO Xionghao REN Tianwei LAI |
| author_sort | Yu GUO |
| collection | DOAJ |
| description | Foil bearings, featuring various advantages (such as high-speed, good operation stability, low friction, long life, strong adaptability, wide temperature range, and oil-free), are promised to have good development prospects and application in high-speed centrifugal machinery. In order to evaluate the actual performance of the multi-leaf foil bearings and promote their further application in the high-speed turbo-machinery, the experimental research of multi-leaf foil bearings with rotor diameter of 25 mm are conducted in this paper. The static and transient tests of the multi-leaf journal bearings with different foil thickness are initiated on the journal bearing test rig to analyze their characteristics, such as the load-deflection, bearing Coulomb friction, start-up and operating friction torque, which could provide guidance for the structural parameter design and exploitation of the bearing. Afterwards, two different bearing combinations are adopted as the supporting components, namely A-type: multi-leaf foil journal bearing with aerostatic thrust bearing and B-type: multi-leaf foil journal bearing with multi-leaf foil thrust bearing. They are applied in the high-speed turbo machinery with the rotor diameter of 25 mm to assess the direct application of the multi-leaf foil bearings in high-speed turbo-machinery. The transient speed-up, high speed, and speed-down experiments of the rotor-bearing system are conducted and their transient characteristics and stability are compared. The experimental results indicate that the start-up (0.6x10-2~1.8x10-2N·m) and steady operation frictional torque (0.25x10-2~0.5x10-2N·m) of the multi-leaf foil journal bearing is relative small; the impeller-rotor system operates steadily and smoothly with good repeatability, supported by A-type and B-type, the maximum rotor speed at about 94krpm achieved in the tests is close under the support of A-type and B-type. However, there are smaller main frequency amplitude, nonsynchronous amplitude and better rotor orbit in the transient processes with the support of B-type, which indicates better stability. |
| first_indexed | 2024-12-11T17:48:23Z |
| format | Article |
| id | doaj.art-9ab0b24e626b4f3592bd1ff0ccba863d |
| institution | Directory Open Access Journal |
| issn | 1881-3054 |
| language | English |
| last_indexed | 2024-12-11T17:48:23Z |
| publishDate | 2020-07-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| spelling | doaj.art-9ab0b24e626b4f3592bd1ff0ccba863d2022-12-22T00:56:17ZengThe Japan Society of Mechanical EngineersJournal of Advanced Mechanical Design, Systems, and Manufacturing1881-30542020-07-01146JAMDSM0085JAMDSM008510.1299/jamdsm.2020jamdsm0085jamdsmApplication of multi-leaf foil bearings in high-speed turbo-machineryYu GUO0Yu HOU1Qi ZHAO2Xionghao REN3Tianwei LAI4State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityState Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityState Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityState Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityState Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityFoil bearings, featuring various advantages (such as high-speed, good operation stability, low friction, long life, strong adaptability, wide temperature range, and oil-free), are promised to have good development prospects and application in high-speed centrifugal machinery. In order to evaluate the actual performance of the multi-leaf foil bearings and promote their further application in the high-speed turbo-machinery, the experimental research of multi-leaf foil bearings with rotor diameter of 25 mm are conducted in this paper. The static and transient tests of the multi-leaf journal bearings with different foil thickness are initiated on the journal bearing test rig to analyze their characteristics, such as the load-deflection, bearing Coulomb friction, start-up and operating friction torque, which could provide guidance for the structural parameter design and exploitation of the bearing. Afterwards, two different bearing combinations are adopted as the supporting components, namely A-type: multi-leaf foil journal bearing with aerostatic thrust bearing and B-type: multi-leaf foil journal bearing with multi-leaf foil thrust bearing. They are applied in the high-speed turbo machinery with the rotor diameter of 25 mm to assess the direct application of the multi-leaf foil bearings in high-speed turbo-machinery. The transient speed-up, high speed, and speed-down experiments of the rotor-bearing system are conducted and their transient characteristics and stability are compared. The experimental results indicate that the start-up (0.6x10-2~1.8x10-2N·m) and steady operation frictional torque (0.25x10-2~0.5x10-2N·m) of the multi-leaf foil journal bearing is relative small; the impeller-rotor system operates steadily and smoothly with good repeatability, supported by A-type and B-type, the maximum rotor speed at about 94krpm achieved in the tests is close under the support of A-type and B-type. However, there are smaller main frequency amplitude, nonsynchronous amplitude and better rotor orbit in the transient processes with the support of B-type, which indicates better stability.https://www.jstage.jst.go.jp/article/jamdsm/14/6/14_2020jamdsm0085/_pdf/-char/enturbo machinerymulti-leaf foil bearingaerodynamic lubricationstability studyengineering application |
| spellingShingle | Yu GUO Yu HOU Qi ZHAO Xionghao REN Tianwei LAI Application of multi-leaf foil bearings in high-speed turbo-machinery Journal of Advanced Mechanical Design, Systems, and Manufacturing turbo machinery multi-leaf foil bearing aerodynamic lubrication stability study engineering application |
| title | Application of multi-leaf foil bearings in high-speed turbo-machinery |
| title_full | Application of multi-leaf foil bearings in high-speed turbo-machinery |
| title_fullStr | Application of multi-leaf foil bearings in high-speed turbo-machinery |
| title_full_unstemmed | Application of multi-leaf foil bearings in high-speed turbo-machinery |
| title_short | Application of multi-leaf foil bearings in high-speed turbo-machinery |
| title_sort | application of multi leaf foil bearings in high speed turbo machinery |
| topic | turbo machinery multi-leaf foil bearing aerodynamic lubrication stability study engineering application |
| url | https://www.jstage.jst.go.jp/article/jamdsm/14/6/14_2020jamdsm0085/_pdf/-char/en |
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