Experimental and Numerical Analysis on the Seizure of a Carbon-Filled PTFE Central Groove Journal Bearing during Start-Up Period
During the start-up period, if the journals bearing bushing and shaft materials have different heat conductivities, the thermal expansion of the shaft might be more rapid than that of the bushing. This reduces the radial clearance between the bearing components and generates higher shear stresses in...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-01-01
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| Series: | Lubricants |
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| Online Access: | http://www.mdpi.com/2075-4442/6/1/14 |
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| author | Bálint Pap Michel Fillon Maxence Guillemont Lionel Bauduin Joseph Chocron Patrice Gédin Ludwig Biadalla |
| author_facet | Bálint Pap Michel Fillon Maxence Guillemont Lionel Bauduin Joseph Chocron Patrice Gédin Ludwig Biadalla |
| author_sort | Bálint Pap |
| collection | DOAJ |
| description | During the start-up period, if the journals bearing bushing and shaft materials have different heat conductivities, the thermal expansion of the shaft might be more rapid than that of the bushing. This reduces the radial clearance between the bearing components and generates higher shear stresses in the lubricating fluid, which can lead to bearing seizure, resulting in the deterioration of the journal bearing. (1) First, we present an experimental case study of the seizure of a central groove journal bearing with a carbon-filled polytetrafluoroethylene (PTFE) bushing and a steel shaft; (2) Then, a static thermoelastohydrodynamic (TEHD) simulation is compared to Cristea’s experiments (Cristea, A.-F., 2012); (3) Then, a pseudo-transient TEHD simulation is performed in order to numerically predict the observed phenomena on the test rig; (4) Finally, the evolution of the oil flow rate and the bushing temperatures during the start-up period determined with the pseudo-transient TEHD modelling are compared to the experimental data of the test rig. The pressure field is determined with the thermohydrodynamic (THD) Elrod’s modelling, with Vijayaraghvan’s robust solver algorithm. The pseudo-transient temperature field in the bearing components as well as the thermal and mechanical deformations are calculated with a commercial software. |
| first_indexed | 2024-04-11T22:29:27Z |
| format | Article |
| id | doaj.art-9243c8be89d14ea58180faa6f836c54e |
| institution | Directory Open Access Journal |
| issn | 2075-4442 |
| language | English |
| last_indexed | 2024-04-11T22:29:27Z |
| publishDate | 2018-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj.art-9243c8be89d14ea58180faa6f836c54e2022-12-22T03:59:33ZengMDPI AGLubricants2075-44422018-01-01611410.3390/lubricants6010014lubricants6010014Experimental and Numerical Analysis on the Seizure of a Carbon-Filled PTFE Central Groove Journal Bearing during Start-Up PeriodBálint Pap0Michel Fillon1Maxence Guillemont2Lionel Bauduin3Joseph Chocron4Patrice Gédin5Ludwig Biadalla6Safran Transmission Systems, 18, Boulevard Louis Seguin, 92707 Colombes, FranceInstitut Pprime, CNRS Université de Poitiers—ISAE-ENSMA, GMSC, SP2MI—Téléport 2, 11 Boulevard Marie et Pierre Curie, 86962 Futuroscope Chasseneuil CEDEX, FranceSafran Transmission Systems, 18, Boulevard Louis Seguin, 92707 Colombes, FranceInstitut Pprime, CNRS Université de Poitiers—ISAE-ENSMA, GMSC, SP2MI—Téléport 2, 11 Boulevard Marie et Pierre Curie, 86962 Futuroscope Chasseneuil CEDEX, FranceSafran Transmission Systems, 18, Boulevard Louis Seguin, 92707 Colombes, FranceSafran Transmission Systems, 18, Boulevard Louis Seguin, 92707 Colombes, FranceSafran Transmission Systems, 18, Boulevard Louis Seguin, 92707 Colombes, FranceDuring the start-up period, if the journals bearing bushing and shaft materials have different heat conductivities, the thermal expansion of the shaft might be more rapid than that of the bushing. This reduces the radial clearance between the bearing components and generates higher shear stresses in the lubricating fluid, which can lead to bearing seizure, resulting in the deterioration of the journal bearing. (1) First, we present an experimental case study of the seizure of a central groove journal bearing with a carbon-filled polytetrafluoroethylene (PTFE) bushing and a steel shaft; (2) Then, a static thermoelastohydrodynamic (TEHD) simulation is compared to Cristea’s experiments (Cristea, A.-F., 2012); (3) Then, a pseudo-transient TEHD simulation is performed in order to numerically predict the observed phenomena on the test rig; (4) Finally, the evolution of the oil flow rate and the bushing temperatures during the start-up period determined with the pseudo-transient TEHD modelling are compared to the experimental data of the test rig. The pressure field is determined with the thermohydrodynamic (THD) Elrod’s modelling, with Vijayaraghvan’s robust solver algorithm. The pseudo-transient temperature field in the bearing components as well as the thermal and mechanical deformations are calculated with a commercial software.http://www.mdpi.com/2075-4442/6/1/14carbon-filled PTFEcentral groove journal bearingstart-up periodbearing seizurepseudo-transient thermoelastohydrodynamic (TEHD) regime |
| spellingShingle | Bálint Pap Michel Fillon Maxence Guillemont Lionel Bauduin Joseph Chocron Patrice Gédin Ludwig Biadalla Experimental and Numerical Analysis on the Seizure of a Carbon-Filled PTFE Central Groove Journal Bearing during Start-Up Period Lubricants carbon-filled PTFE central groove journal bearing start-up period bearing seizure pseudo-transient thermoelastohydrodynamic (TEHD) regime |
| title | Experimental and Numerical Analysis on the Seizure of a Carbon-Filled PTFE Central Groove Journal Bearing during Start-Up Period |
| title_full | Experimental and Numerical Analysis on the Seizure of a Carbon-Filled PTFE Central Groove Journal Bearing during Start-Up Period |
| title_fullStr | Experimental and Numerical Analysis on the Seizure of a Carbon-Filled PTFE Central Groove Journal Bearing during Start-Up Period |
| title_full_unstemmed | Experimental and Numerical Analysis on the Seizure of a Carbon-Filled PTFE Central Groove Journal Bearing during Start-Up Period |
| title_short | Experimental and Numerical Analysis on the Seizure of a Carbon-Filled PTFE Central Groove Journal Bearing during Start-Up Period |
| title_sort | experimental and numerical analysis on the seizure of a carbon filled ptfe central groove journal bearing during start up period |
| topic | carbon-filled PTFE central groove journal bearing start-up period bearing seizure pseudo-transient thermoelastohydrodynamic (TEHD) regime |
| url | http://www.mdpi.com/2075-4442/6/1/14 |
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