Low Viscosity Medium-Lubricated Bearing

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

Deadline for manuscript submissions: closed (31 December 2025) | Viewed by 1201

Special Issue Editor


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Guest Editor
Department of Mechanics, Northwestern Polytechnical University, Xi’an 710072, China
Interests: bearing lubrication; friction dynamics; rotor dynamics
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Special Issue Information

Dear Colleagues,

In recent years, under the guidance of the “emission peak" and "carbon neutrality”, the international community has set off an upsurge of research on green and clean energy. Therefore, the traditional bearing with oil as a lubricant has begun to withdraw from the stage of shipping. Novel low-viscosity medium-lubricated bearings possess plenty of advantages, such as high cleanliness, high reliability, high specific heat capacity, high efficiency, and high vibration resistance. Following the experimental and numerical research on the bearings, the main performances were mastered, and the mature structural design and standardization system were also established. At present, novel low-viscosity medium-lubricated bearings are widely employed in ships, submarines, pumps, and other fields. As the crucial support component of power systems, the performances and service life of bearings directly determine the efficiency and safety of ships in navigating. When the ship works on the sea, the shaft is at a high-speed condition. After being disturbed by the stern shaft and bearing’s weight, the problems of poor lubrication, load capacity reduction, poor stability, and serious friction still exist.

We are pleased to invite you to submit a reseach paper to this Special Issue.

  • The journal plans to collect 10-15 papers about the lubrication and friction performance of such bearings and will print them in book form if this number is reached.
  • Suggested themes and article types for submissions.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

lubrication mechanism, structural design, fluid–structure coupling, friction and wear, optimization analysis, dynamic characteristics, surface texture treatment, groove design, lubrication regime, dynamic behaviros, tribological performances, and bionic application.

Prof. Dr. Zhongliang Xie
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 250 words) can be sent to the Editorial Office for assessment.

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

  • plain journal/thrust bearing
  • lubrication regime
  • dynamic behaviros
  • tribological performances
  • rotor dynamics

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Published Papers (1 paper)

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Research

15 pages, 3660 KB  
Article
Dynamic Stiffness Characteristics of Bearings Under Combined Loads with Rotor Excitation
by Wei Dou, Shengdi Sun, Xinjie Zang, Xi Kuang and Zhilei Jin
Lubricants 2026, 14(3), 128; https://doi.org/10.3390/lubricants14030128 - 17 Mar 2026
Viewed by 726
Abstract
The unbalanced excitation of a rotor has a significant impact on the dynamic stiffness of the bearing. Traditional unbalanced excitation force models for the calculation of bearing stiffness are usually simplified as single-directional excitation models, which cannot fully reflect the impact of unbalanced [...] Read more.
The unbalanced excitation of a rotor has a significant impact on the dynamic stiffness of the bearing. Traditional unbalanced excitation force models for the calculation of bearing stiffness are usually simplified as single-directional excitation models, which cannot fully reflect the impact of unbalanced excitation of the rotor on the dynamic stiffness of the bearing. A bidirectional excitation model based on orthogonal decomposition is used in this paper and is introduced into the finite element model of the bearing based on ABAQUS. The proposed bearing mechanics model is verified through numerical software and a bearing rotor system test rig. The effects of single/bidirectional excitation models on the dynamic stiffness of bearings were compared. The variation in bearing dynamic stiffness characteristics under rotor excitation and axial load were discussed. The results show that the presented model has good consistency with experimental results (the proposed model yields a maximum stress deviation of only 2.42% compared to MESYS numerical results and a maximum dynamic stiffness difference of 9.12% against experimental data). The traditional unidirectional excitation force model can only consider the influence of excitation frequency on the dynamic stiffness of bearings. However, the unbalanced excitation force model considering bidirectional excitation can further take into account the influence of excitation amplitude on the dynamic stiffness of bearings. Under the combined effect of excitation frequency and excitation amplitude, the radial dynamic stiffness of bearings shows a quadratic nonlinear hardening trend with rotational speed. As the rotational speed increases, the contribution of axial load to the radial stiffness significantly enhances: in the low-speed zone, its influence is only approximately 8%, while in the high-speed zone, it increases to 34%. Although the modeling method formed in this paper does not take into account the thermal–fluid dynamic coupling effect of the lubricating oil film, the obtained laws can provide a basis for the dynamic design of rotor systems of actual liquid rocket engines and have certain engineering application value. Full article
(This article belongs to the Special Issue Low Viscosity Medium-Lubricated Bearing)
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