Experimental Identification of the Void Fraction in a Large Hydrodynamic Offset Halves Bearing
A common approach to optimising hydrodynamic journal bearings for power loss is to reduce the lubricant supply and direct the oil to specific bearing areas where it is needed to guarantee safe operation. This requires information on the processes in the gap and the surrounding pocket areas for both...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-12-01
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| Series: | Lubricants |
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| Online Access: | https://www.mdpi.com/2075-4442/13/1/7 |
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| author | Alexander Engels Sören Wettmarshausen Michael Stottrop Thomas Hagemann Christoph Weißbacher Hubert Schwarze Beate Bender |
| author_facet | Alexander Engels Sören Wettmarshausen Michael Stottrop Thomas Hagemann Christoph Weißbacher Hubert Schwarze Beate Bender |
| author_sort | Alexander Engels |
| collection | DOAJ |
| description | A common approach to optimising hydrodynamic journal bearings for power loss is to reduce the lubricant supply and direct the oil to specific bearing areas where it is needed to guarantee safe operation. This requires information on the processes in the gap and the surrounding pocket areas for both pre-design and simulation. In this paper, a system consisting of a total of eight cameras is used to determine the void fraction in deep grooves outside the lubricant film. The void fraction in the lubrication gap is determined using a novel method for the evaluation of two proximity measurements. While the variation of the deep groove void fraction is realised by a special oil supply and radially adjustable deep groove elements, the gap void fraction is adjusted by the oil supply in the lube oil pockets at the pad leading edges. On the one hand, the experimental investigations show that the void fraction of the deep groove areas has hardly any influence on the general operating behaviour. On the other hand, the void fraction in the lubrication gap can be measured quantitatively for the first time, and the operating point-dependent gas fractions can be visualised. It is also shown that gaseous cavitation is the main mechanism in partially filled regions of the lubrication gap. |
| format | Article |
| id | doaj-art-6d74491fdd76409caed7469a45f5437d |
| institution | Kabale University |
| issn | 2075-4442 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Lubricants |
| spelling | doaj-art-6d74491fdd76409caed7469a45f5437d2025-01-24T13:38:57ZengMDPI AGLubricants2075-44422024-12-01131710.3390/lubricants13010007Experimental Identification of the Void Fraction in a Large Hydrodynamic Offset Halves BearingAlexander Engels0Sören Wettmarshausen1Michael Stottrop2Thomas Hagemann3Christoph Weißbacher4Hubert Schwarze5Beate Bender6Product Development, Ruhr-University Bochum, 44801 Bochum, GermanyInstitute of Tribology and Energy Conversion Machinery, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, GermanyProduct Development, Ruhr-University Bochum, 44801 Bochum, GermanyInstitute of Tribology and Energy Conversion Machinery, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, GermanyGleitlagertechnik Weißbacher GmbH, 46519 Alpen, GermanyInstitute of Tribology and Energy Conversion Machinery, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, GermanyProduct Development, Ruhr-University Bochum, 44801 Bochum, GermanyA common approach to optimising hydrodynamic journal bearings for power loss is to reduce the lubricant supply and direct the oil to specific bearing areas where it is needed to guarantee safe operation. This requires information on the processes in the gap and the surrounding pocket areas for both pre-design and simulation. In this paper, a system consisting of a total of eight cameras is used to determine the void fraction in deep grooves outside the lubricant film. The void fraction in the lubrication gap is determined using a novel method for the evaluation of two proximity measurements. While the variation of the deep groove void fraction is realised by a special oil supply and radially adjustable deep groove elements, the gap void fraction is adjusted by the oil supply in the lube oil pockets at the pad leading edges. On the one hand, the experimental investigations show that the void fraction of the deep groove areas has hardly any influence on the general operating behaviour. On the other hand, the void fraction in the lubrication gap can be measured quantitatively for the first time, and the operating point-dependent gas fractions can be visualised. It is also shown that gaseous cavitation is the main mechanism in partially filled regions of the lubrication gap.https://www.mdpi.com/2075-4442/13/1/7large hydrodynamic journal bearingsturbomachinery applicationspower lossoperational safetybearing efficiencyvoid fraction |
| spellingShingle | Alexander Engels Sören Wettmarshausen Michael Stottrop Thomas Hagemann Christoph Weißbacher Hubert Schwarze Beate Bender Experimental Identification of the Void Fraction in a Large Hydrodynamic Offset Halves Bearing Lubricants large hydrodynamic journal bearings turbomachinery applications power loss operational safety bearing efficiency void fraction |
| title | Experimental Identification of the Void Fraction in a Large Hydrodynamic Offset Halves Bearing |
| title_full | Experimental Identification of the Void Fraction in a Large Hydrodynamic Offset Halves Bearing |
| title_fullStr | Experimental Identification of the Void Fraction in a Large Hydrodynamic Offset Halves Bearing |
| title_full_unstemmed | Experimental Identification of the Void Fraction in a Large Hydrodynamic Offset Halves Bearing |
| title_short | Experimental Identification of the Void Fraction in a Large Hydrodynamic Offset Halves Bearing |
| title_sort | experimental identification of the void fraction in a large hydrodynamic offset halves bearing |
| topic | large hydrodynamic journal bearings turbomachinery applications power loss operational safety bearing efficiency void fraction |
| url | https://www.mdpi.com/2075-4442/13/1/7 |
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