Improvement of calcuration on mixing inlet temperatures in bearing thermo-hydrodyanamic lubrication analysis and its evaluation
In this study, we intended to predict bearing temperature of oil bath tilting bearings with high degrees of accuracy, and developed a more detailed formula estimating mixing temperature at the inlet of the oil film on the pad. In order to consider the complicated flow in terms of the fluid and heat...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | Japanese |
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The Japan Society of Mechanical Engineers
2019-02-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/85/871/85_18-00385/_pdf/-char/en |
| _version_ | 1811317700006248448 |
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| author | Motoki SATO Makoto HEMMI Tomoaki YAMASHITA Naohiko TAKAHASHI |
| author_facet | Motoki SATO Makoto HEMMI Tomoaki YAMASHITA Naohiko TAKAHASHI |
| author_sort | Motoki SATO |
| collection | DOAJ |
| description | In this study, we intended to predict bearing temperature of oil bath tilting bearings with high degrees of accuracy, and developed a more detailed formula estimating mixing temperature at the inlet of the oil film on the pad. In order to consider the complicated flow in terms of the fluid and heat between pads, we precisely solved the conservation laws of the flow and energy at the control volume adding effects of rise of temperature due to agitation loss and leak between the shaft and the seal, and we got the accurate temperature of the mixing inlet oil. Moreover, we measured the bearing temperature distributions under various conditions with a test bearing bored 280mm in diameter to validate the analysis. Eventually, we got the following conclusions. (1) Compared with the analysis using the conventional model, the proposed model can reduce the errors of the oil film temperature distribution by one third. (2) In terms of prediction of the mixing inlet temperature that affects degrees of precision of the oil film distribution, the proposed model can improve 2 oC of variability and 10 oC of average errors, compared with He's model, and it found the fact that the method can improve the accuracy of the calcuration of bearing temperature. (3) The proposed model can predict temperature at the evaluation point within -8.6~+5.4 oC. |
| first_indexed | 2024-04-13T12:12:53Z |
| format | Article |
| id | doaj.art-74f24146658e4fce91fb22ffeceaef57 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-13T12:12:53Z |
| publishDate | 2019-02-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-74f24146658e4fce91fb22ffeceaef572022-12-22T02:47:27ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612019-02-018587118-0038518-0038510.1299/transjsme.18-00385transjsmeImprovement of calcuration on mixing inlet temperatures in bearing thermo-hydrodyanamic lubrication analysis and its evaluationMotoki SATO0Makoto HEMMI1Tomoaki YAMASHITA2Naohiko TAKAHASHI3Hitachi, Ltd. Research and Development GroupHitachi, Ltd. Research and Development GroupHitachi, Ltd. Research and Development GroupHitachi, Ltd. Industrial Products CompanyIn this study, we intended to predict bearing temperature of oil bath tilting bearings with high degrees of accuracy, and developed a more detailed formula estimating mixing temperature at the inlet of the oil film on the pad. In order to consider the complicated flow in terms of the fluid and heat between pads, we precisely solved the conservation laws of the flow and energy at the control volume adding effects of rise of temperature due to agitation loss and leak between the shaft and the seal, and we got the accurate temperature of the mixing inlet oil. Moreover, we measured the bearing temperature distributions under various conditions with a test bearing bored 280mm in diameter to validate the analysis. Eventually, we got the following conclusions. (1) Compared with the analysis using the conventional model, the proposed model can reduce the errors of the oil film temperature distribution by one third. (2) In terms of prediction of the mixing inlet temperature that affects degrees of precision of the oil film distribution, the proposed model can improve 2 oC of variability and 10 oC of average errors, compared with He's model, and it found the fact that the method can improve the accuracy of the calcuration of bearing temperature. (3) The proposed model can predict temperature at the evaluation point within -8.6~+5.4 oC.https://www.jstage.jst.go.jp/article/transjsme/85/871/85_18-00385/_pdf/-char/entilting pad bearingcentrifugal compressornumerical analysismixing temeraturecarry over oil |
| spellingShingle | Motoki SATO Makoto HEMMI Tomoaki YAMASHITA Naohiko TAKAHASHI Improvement of calcuration on mixing inlet temperatures in bearing thermo-hydrodyanamic lubrication analysis and its evaluation Nihon Kikai Gakkai ronbunshu tilting pad bearing centrifugal compressor numerical analysis mixing temerature carry over oil |
| title | Improvement of calcuration on mixing inlet temperatures in bearing thermo-hydrodyanamic lubrication analysis and its evaluation |
| title_full | Improvement of calcuration on mixing inlet temperatures in bearing thermo-hydrodyanamic lubrication analysis and its evaluation |
| title_fullStr | Improvement of calcuration on mixing inlet temperatures in bearing thermo-hydrodyanamic lubrication analysis and its evaluation |
| title_full_unstemmed | Improvement of calcuration on mixing inlet temperatures in bearing thermo-hydrodyanamic lubrication analysis and its evaluation |
| title_short | Improvement of calcuration on mixing inlet temperatures in bearing thermo-hydrodyanamic lubrication analysis and its evaluation |
| title_sort | improvement of calcuration on mixing inlet temperatures in bearing thermo hydrodyanamic lubrication analysis and its evaluation |
| topic | tilting pad bearing centrifugal compressor numerical analysis mixing temerature carry over oil |
| url | https://www.jstage.jst.go.jp/article/transjsme/85/871/85_18-00385/_pdf/-char/en |
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