Research Trends in Hydrodynamic Journal and Thrust Bearings

A special issue of Lubricants (ISSN 2075-4442).

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 8822

Special Issue Editor


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Guest Editor
Pprime Institute, CNRS-University of Poitiers-ISAE ENSMA, Mechanical Engineering and Complex Systems Dept., SP2MI – Bat H1, 11 Bd Marie et Pierre Curie, TSA 41123, 86073 Poitiers CEDEX 9, France
Interests: theoretical and experimental studies of hydrodynamic and thrust bearings working under adverse conditions; mixed lubrication; textures; XPHD lubrication; experiments: steady-state and transient operating conditions of fixed geometry and tilting pad bearings with different materials (Babbitt, PEEK, PTFE) and lubricants (oil, water, contaminated lubricants)

Special Issue Information

Dear Colleagues,

Energy production machinery is one of the main subjects of current engineering research. Manufacturers and users are seeking to increase the performance of these machines and, thus, to extend the maintenance intervals as far as possible. In these types of machines, bearings are one of the most common elements. Therefore, predicting their behavior as precisely as possible according to their wear and scheduling maintenance operations is essential. Bearings are also used in many other devices where rotating shafts need to be guided and supported, such as cars, boats, etc. Their role is to guide and support surfaces in relative motion and, at the same time, to reduce friction. Even if it seems very simple, studying the performance of bearings involves complex, physical, chemical, mechanical, and energetic phenomena.

This Special Issue will pay special attention to the latest developments concerning lubrication mechanisms and lubricants and the effect of operating parameters on their performance, with both experimental and numerical studies of their behavior.

Dr. Jean Bouyer
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Lubricants is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Advanced bearings (new materials, lubricants, operating conditions, etc.)
  • Resistance of the coatings during the start-up and shutdown phases
  • Performance of polymer coatings
  • Static and dynamic behavior of bearings in degraded situations (scratches, starvation, misalignment, etc.)
  • Multiphysics coupling: dynamic and thermal behavior
  • Health indicators and new monitoring techniques for bearings mixing sensors and digital model

Published Papers (3 papers)

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Research

9 pages, 2550 KiB  
Article
Determination of the Natural Frequency of the Model Spindle System with Active Regulation of the Initial Tension of the Bearings
by Paweł Turek
Lubricants 2021, 9(7), 68; https://0-doi-org.brum.beds.ac.uk/10.3390/lubricants9070068 - 13 Jul 2021
Cited by 1 | Viewed by 2332
Abstract
This article presents a test stand with a model high-speed spindle equipped with a system of active control of the preload of the bearings. This preload was changed by means of three piezo actuators. The work presents the results of tests during which [...] Read more.
This article presents a test stand with a model high-speed spindle equipped with a system of active control of the preload of the bearings. This preload was changed by means of three piezo actuators. The work presents the results of tests during which the commercial Abacus measuring equipment from Data Physics was used. Its application has shown that the spindle system with angular contact ball bearings is responsive to changes in the preload value of these bearings. The change preload resulted in a change in the value of the resonant frequency of the system and its amplitude. This article presents the dependence between the variable value of the preload of the bearings and the corresponding values of the resonance frequency and amplitude of the spindle system. The use of the Abacus measuring equipment for testing allowed for the preparation of a model showing the dynamic behavior of the spindle. The system was forced by a signal with known parameters, and the response to this excitation was recorded at eleven points located on the surface of the entire spindle. Full article
(This article belongs to the Special Issue Research Trends in Hydrodynamic Journal and Thrust Bearings)
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26 pages, 60924 KiB  
Article
Towards Ecological Alternatives in Bearing Lubrication
by Bachir Bouchehit, Benyebka Bou-Saïd and John Tichy
Lubricants 2021, 9(6), 62; https://0-doi-org.brum.beds.ac.uk/10.3390/lubricants9060062 - 09 Jun 2021
Cited by 2 | Viewed by 2469
Abstract
Hydrogen is the cleanest fuel available because its combustion product is water. The internal combustion engine can, in principle and without significant modifications, run on hydrogen to produce mechanical energy. Regarding the technological solution leading to compact engines, a question to ask is [...] Read more.
Hydrogen is the cleanest fuel available because its combustion product is water. The internal combustion engine can, in principle and without significant modifications, run on hydrogen to produce mechanical energy. Regarding the technological solution leading to compact engines, a question to ask is the following: Can combustion engine systems be lubricated with hydrogen? In general, since many applications such as in turbomachines, is it possible to use the surrounding gas as a lubricant? In this paper, journal bearings global parameters are calculated and compared for steady state and dynamic conditions for different gas constituents such as air, pentafluoropropane, helium and hydrogen. Such a bearing may be promising as an ecological alternative to liquid lubrication. Full article
(This article belongs to the Special Issue Research Trends in Hydrodynamic Journal and Thrust Bearings)
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19 pages, 7268 KiB  
Article
Numerical Study of a Journal Bearing with Scratches: Validation with Literature and Comparison with Experimental Data
by Anh T. Vo, Michel Fillon and Jean Bouyer
Lubricants 2021, 9(6), 61; https://0-doi-org.brum.beds.ac.uk/10.3390/lubricants9060061 - 05 Jun 2021
Cited by 3 | Viewed by 3170
Abstract
The lifespan of journal bearings is directly related to the operating conditions they have to face and reducing their maintenance intervals allows one to have a clear idea about their performance when issues occur. The presence of scratches on one of its surfaces [...] Read more.
The lifespan of journal bearings is directly related to the operating conditions they have to face and reducing their maintenance intervals allows one to have a clear idea about their performance when issues occur. The presence of scratches on one of its surfaces degrades the performance of a journal bearing. These effects have already been assessed in experiments; however, numerical studies on this subject are still scarce. This work develops a numerical thermohydrodynamic (THD) program using the finite volume method to simulate the effects of scratches on the performance of journal bearings. To test the validity of the program, the numerical results are compared with the scientific literature and with experimental measurements conducted using the Pprime Institute journal bearing test rig. Some minor discrepancies are observed, but the overall results are in good agreement. Full article
(This article belongs to the Special Issue Research Trends in Hydrodynamic Journal and Thrust Bearings)
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