Study on Oil Film Characteristic of Sliding Bearing based on SDT Roundness Error Model
A dynamic model of journal bearing rotor system with roundness error is established，and a new generalized roundness error equation is derived based on the small displacement theory （SDT）. The Reynolds equation is solved numerically under the Swift-Stieber boundary conditions，and the influence of the...
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Editorial Office of Journal of Mechanical Transmission
2022-04-01
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| Series: | Jixie chuandong |
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| Online Access: | http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2022.04.006 |
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| author | Zhenyu Chen Wubin Xu Bing Li |
| author_facet | Zhenyu Chen Wubin Xu Bing Li |
| author_sort | Zhenyu Chen |
| collection | DOAJ |
| description | A dynamic model of journal bearing rotor system with roundness error is established，and a new generalized roundness error equation is derived based on the small displacement theory （SDT）. The Reynolds equation is solved numerically under the Swift-Stieber boundary conditions，and the influence of the spin parameter of roundness error <italic>d<sub>x</sub></italic>，which is characterized by SDT，on the oil film pressure，bearing capacity，critical speed and stability of sliding bearing is analyzed emphatically. The results show that the maximum oil film pressure is changed by the spin parameter of roundness error， and the oil film pressure increases with the increase of the spin parameter； in addition， the existence of journal roundness error is beneficial to the bearing capacity and stability of sliding bearing rotor system to a certain extent； among them，when eccentricity <italic>ε</italic><0.8， the influence of journal roundness error on the bearing capacity of the system is more obvious，and when Sommerfeld number <italic>S</italic>>0.6， the influence of journal roundness error on the stability is less； at the same time，the critical speed of the system will increase with the increase of screw parameter，especially when eccentricity <italic>ε</italic>>0.6. |
| format | Article |
| id | doaj-art-8375d5920e214ffc86ca3c4398a264e8 |
| institution | Kabale University |
| issn | 1004-2539 |
| language | zho |
| publishDate | 2022-04-01 |
| publisher | Editorial Office of Journal of Mechanical Transmission |
| record_format | Article |
| series | Jixie chuandong |
| spelling | doaj-art-8375d5920e214ffc86ca3c4398a264e82025-01-10T13:59:33ZzhoEditorial Office of Journal of Mechanical TransmissionJixie chuandong1004-25392022-04-0146424730519133Study on Oil Film Characteristic of Sliding Bearing based on SDT Roundness Error ModelZhenyu ChenWubin XuBing LiA dynamic model of journal bearing rotor system with roundness error is established，and a new generalized roundness error equation is derived based on the small displacement theory （SDT）. The Reynolds equation is solved numerically under the Swift-Stieber boundary conditions，and the influence of the spin parameter of roundness error <italic>d<sub>x</sub></italic>，which is characterized by SDT，on the oil film pressure，bearing capacity，critical speed and stability of sliding bearing is analyzed emphatically. The results show that the maximum oil film pressure is changed by the spin parameter of roundness error， and the oil film pressure increases with the increase of the spin parameter； in addition， the existence of journal roundness error is beneficial to the bearing capacity and stability of sliding bearing rotor system to a certain extent； among them，when eccentricity <italic>ε</italic><0.8， the influence of journal roundness error on the bearing capacity of the system is more obvious，and when Sommerfeld number <italic>S</italic>>0.6， the influence of journal roundness error on the stability is less； at the same time，the critical speed of the system will increase with the increase of screw parameter，especially when eccentricity <italic>ε</italic>>0.6.http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2022.04.006Small displacement theory（SDT）Sliding bearingRoundness errorOil film characteristic |
| spellingShingle | Zhenyu Chen Wubin Xu Bing Li Study on Oil Film Characteristic of Sliding Bearing based on SDT Roundness Error Model Jixie chuandong Small displacement theory（SDT） Sliding bearing Roundness error Oil film characteristic |
| title | Study on Oil Film Characteristic of Sliding Bearing based on SDT Roundness Error Model |
| title_full | Study on Oil Film Characteristic of Sliding Bearing based on SDT Roundness Error Model |
| title_fullStr | Study on Oil Film Characteristic of Sliding Bearing based on SDT Roundness Error Model |
| title_full_unstemmed | Study on Oil Film Characteristic of Sliding Bearing based on SDT Roundness Error Model |
| title_short | Study on Oil Film Characteristic of Sliding Bearing based on SDT Roundness Error Model |
| title_sort | study on oil film characteristic of sliding bearing based on sdt roundness error model |
| topic | Small displacement theory（SDT） Sliding bearing Roundness error Oil film characteristic |
| url | http://www.jxcd.net.cn/thesisDetails#10.16578/j.issn.1004.2539.2022.04.006 |
| work_keys_str_mv | AT zhenyuchen studyonoilfilmcharacteristicofslidingbearingbasedonsdtroundnesserrormodel AT wubinxu studyonoilfilmcharacteristicofslidingbearingbasedonsdtroundnesserrormodel AT bingli studyonoilfilmcharacteristicofslidingbearingbasedonsdtroundnesserrormodel |