Numerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant support
A type of foil journal bearings with double-layer protuberant foils as elastic support was studied by numerical analysis and experiments. Two kinds of material (beryllium bronze and stainless steel) with different elasticity were used for the protuberant foils of the bearings. The analyzing model co...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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The Japan Society of Mechanical Engineers
2016-05-01
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| Series: | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/jamdsm/10/2/10_2016jamdsm0027/_pdf/-char/en |
| _version_ | 1811296879668887552 |
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| author | Yueqing ZHENG Shuangtao CHEN Tianwei LAI Xingqun ZHANG Yu HOU |
| author_facet | Yueqing ZHENG Shuangtao CHEN Tianwei LAI Xingqun ZHANG Yu HOU |
| author_sort | Yueqing ZHENG |
| collection | DOAJ |
| description | A type of foil journal bearings with double-layer protuberant foils as elastic support was studied by numerical analysis and experiments. Two kinds of material (beryllium bronze and stainless steel) with different elasticity were used for the protuberant foils of the bearings. The analyzing model couples the hydrodynamics pressure of the gas film to the elastic deflection of the top foil and the underlying protuberant foils. The hydrodynamics of gas film is described by the Reynolds equation. The top foil and the protuberant foils are modeled as thin plates and the protuberances are treated as rigid support. For calculating the deflection of the top foil, the deflection of the protuberant layer beneath the top foil is taken into account. With a given load, the gas film thickness and pressure are obtained by using finite element method and finite difference method. The key static and dynamic parameters are presented. In experiments, both of the two foil bearings run well in a turbo-expander. The new takeoff and shutoff pressure and speed are proposed for practical operation of the hydrodynamic lubricated high speed turbo-expander. In addition, the synchronous and subsynchronous rotor motions have been tested and analyzed. The experimental tests of the two bearings in a high-speed turbo-expander suggest that the bearing using stainless steel as the foil material shows higher stiffness, which agrees well with the numerical predictions. |
| first_indexed | 2024-04-13T05:56:10Z |
| format | Article |
| id | doaj.art-966962f2f6f949e590c3616c2cedd102 |
| institution | Directory Open Access Journal |
| issn | 1881-3054 |
| language | English |
| last_indexed | 2024-04-13T05:56:10Z |
| publishDate | 2016-05-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Journal of Advanced Mechanical Design, Systems, and Manufacturing |
| spelling | doaj.art-966962f2f6f949e590c3616c2cedd1022022-12-22T02:59:38ZengThe Japan Society of Mechanical EngineersJournal of Advanced Mechanical Design, Systems, and Manufacturing1881-30542016-05-01102JAMDSM0027JAMDSM002710.1299/jamdsm.2016jamdsm0027jamdsmNumerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant supportYueqing ZHENG0Shuangtao CHEN1Tianwei LAI2Xingqun ZHANG3Yu HOU4School of Energy and Power Engineering Xi'an Jiaotong UniversitySchool of Energy and Power Engineering Xi'an Jiaotong UniversitySchool of Energy and Power Engineering Xi'an Jiaotong UniversitySchool of Energy and Power Engineering Xi'an Jiaotong UniversitySchool of Energy and Power Engineering Xi'an Jiaotong UniversityA type of foil journal bearings with double-layer protuberant foils as elastic support was studied by numerical analysis and experiments. Two kinds of material (beryllium bronze and stainless steel) with different elasticity were used for the protuberant foils of the bearings. The analyzing model couples the hydrodynamics pressure of the gas film to the elastic deflection of the top foil and the underlying protuberant foils. The hydrodynamics of gas film is described by the Reynolds equation. The top foil and the protuberant foils are modeled as thin plates and the protuberances are treated as rigid support. For calculating the deflection of the top foil, the deflection of the protuberant layer beneath the top foil is taken into account. With a given load, the gas film thickness and pressure are obtained by using finite element method and finite difference method. The key static and dynamic parameters are presented. In experiments, both of the two foil bearings run well in a turbo-expander. The new takeoff and shutoff pressure and speed are proposed for practical operation of the hydrodynamic lubricated high speed turbo-expander. In addition, the synchronous and subsynchronous rotor motions have been tested and analyzed. The experimental tests of the two bearings in a high-speed turbo-expander suggest that the bearing using stainless steel as the foil material shows higher stiffness, which agrees well with the numerical predictions.https://www.jstage.jst.go.jp/article/jamdsm/10/2/10_2016jamdsm0027/_pdf/-char/enhydrodynamic gas lubricationfoil journal bearingdynamic performancenatural frequencyturbo-expander |
| spellingShingle | Yueqing ZHENG Shuangtao CHEN Tianwei LAI Xingqun ZHANG Yu HOU Numerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant support Journal of Advanced Mechanical Design, Systems, and Manufacturing hydrodynamic gas lubrication foil journal bearing dynamic performance natural frequency turbo-expander |
| title | Numerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant support |
| title_full | Numerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant support |
| title_fullStr | Numerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant support |
| title_full_unstemmed | Numerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant support |
| title_short | Numerical and experimental study on the dynamic characteristics of the foil journal bearing with double-layer protuberant support |
| title_sort | numerical and experimental study on the dynamic characteristics of the foil journal bearing with double layer protuberant support |
| topic | hydrodynamic gas lubrication foil journal bearing dynamic performance natural frequency turbo-expander |
| url | https://www.jstage.jst.go.jp/article/jamdsm/10/2/10_2016jamdsm0027/_pdf/-char/en |
| work_keys_str_mv | AT yueqingzheng numericalandexperimentalstudyonthedynamiccharacteristicsofthefoiljournalbearingwithdoublelayerprotuberantsupport AT shuangtaochen numericalandexperimentalstudyonthedynamiccharacteristicsofthefoiljournalbearingwithdoublelayerprotuberantsupport AT tianweilai numericalandexperimentalstudyonthedynamiccharacteristicsofthefoiljournalbearingwithdoublelayerprotuberantsupport AT xingqunzhang numericalandexperimentalstudyonthedynamiccharacteristicsofthefoiljournalbearingwithdoublelayerprotuberantsupport AT yuhou numericalandexperimentalstudyonthedynamiccharacteristicsofthefoiljournalbearingwithdoublelayerprotuberantsupport |