Critical Speed of Hyperbolic Disks and Eccentricity Effects on The Stability of The Rotor Bearing System
The critical speed of hyperbolic disks for the selected model is calculatedin three different cases, anisotropic material and thermal case, isotropicmaterial and thermal case finally isotropic material and thermal withgenerated heat case. The second case is found to be the best because thecritical s...
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| Format: | Article |
| Language: | English |
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Unviversity of Technology- Iraq
2007-10-01
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| Series: | Engineering and Technology Journal |
| Subjects: | |
| Online Access: | https://etj.uotechnology.edu.iq/article_25941_3307c030ba0793a66037d178ba89083b.pdf |
| _version_ | 1797325187832610816 |
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| author | Muhannad Zedan Khalifa |
| author_facet | Muhannad Zedan Khalifa |
| author_sort | Muhannad Zedan Khalifa |
| collection | DOAJ |
| description | The critical speed of hyperbolic disks for the selected model is calculatedin three different cases, anisotropic material and thermal case, isotropicmaterial and thermal case finally isotropic material and thermal withgenerated heat case. The second case is found to be the best because thecritical speed occurs above maximum speed values.For recognition of the eccentricity (e) effects on the stability, the originalbearings of the selected model were tilting pads bearing replaced byadjustable hydrodynamic pads bearing. The results proved that stabilitycriteria (Sc), critical mass (Mc), whirling frequency ratio ( - 2fn ) of variablerotational speed of the adjustable hydrodynamic pads bearing are stable forthe range of eccentricity (e) about 0.02 mm to 0.09 mm. Finally thethermohydrodynamic (THD) analysis of eccentricity ratio (e) has effects onthe stability of the rotor-bearing system. |
| first_indexed | 2024-03-08T06:05:58Z |
| format | Article |
| id | doaj.art-cbc7b3f13cd142429a6aab4304e42ed9 |
| institution | Directory Open Access Journal |
| issn | 1681-6900 2412-0758 |
| language | English |
| last_indexed | 2024-03-08T06:05:58Z |
| publishDate | 2007-10-01 |
| publisher | Unviversity of Technology- Iraq |
| record_format | Article |
| series | Engineering and Technology Journal |
| spelling | doaj.art-cbc7b3f13cd142429a6aab4304e42ed92024-02-04T17:54:31ZengUnviversity of Technology- IraqEngineering and Technology Journal1681-69002412-07582007-10-01258998101110.30684/etj.25.8.825941Critical Speed of Hyperbolic Disks and Eccentricity Effects on The Stability of The Rotor Bearing SystemMuhannad Zedan KhalifaThe critical speed of hyperbolic disks for the selected model is calculatedin three different cases, anisotropic material and thermal case, isotropicmaterial and thermal case finally isotropic material and thermal withgenerated heat case. The second case is found to be the best because thecritical speed occurs above maximum speed values.For recognition of the eccentricity (e) effects on the stability, the originalbearings of the selected model were tilting pads bearing replaced byadjustable hydrodynamic pads bearing. The results proved that stabilitycriteria (Sc), critical mass (Mc), whirling frequency ratio ( - 2fn ) of variablerotational speed of the adjustable hydrodynamic pads bearing are stable forthe range of eccentricity (e) about 0.02 mm to 0.09 mm. Finally thethermohydrodynamic (THD) analysis of eccentricity ratio (e) has effects onthe stability of the rotor-bearing system.https://etj.uotechnology.edu.iq/article_25941_3307c030ba0793a66037d178ba89083b.pdfhyperbolic diskrotorbearing systemcritical speedstability criteria |
| spellingShingle | Muhannad Zedan Khalifa Critical Speed of Hyperbolic Disks and Eccentricity Effects on The Stability of The Rotor Bearing System Engineering and Technology Journal hyperbolic disk rotor bearing system critical speed stability criteria |
| title | Critical Speed of Hyperbolic Disks and Eccentricity Effects on The Stability of The Rotor Bearing System |
| title_full | Critical Speed of Hyperbolic Disks and Eccentricity Effects on The Stability of The Rotor Bearing System |
| title_fullStr | Critical Speed of Hyperbolic Disks and Eccentricity Effects on The Stability of The Rotor Bearing System |
| title_full_unstemmed | Critical Speed of Hyperbolic Disks and Eccentricity Effects on The Stability of The Rotor Bearing System |
| title_short | Critical Speed of Hyperbolic Disks and Eccentricity Effects on The Stability of The Rotor Bearing System |
| title_sort | critical speed of hyperbolic disks and eccentricity effects on the stability of the rotor bearing system |
| topic | hyperbolic disk rotor bearing system critical speed stability criteria |
| url | https://etj.uotechnology.edu.iq/article_25941_3307c030ba0793a66037d178ba89083b.pdf |
| work_keys_str_mv | AT muhannadzedankhalifa criticalspeedofhyperbolicdisksandeccentricityeffectsonthestabilityoftherotorbearingsystem |