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Tribology in Machine Components
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Tribology in Machine Components

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Mechanical Engineering".

Deadline for manuscript submissions: closed (30 June 2021) | Viewed by 8408

Special Issue Editor

Prof. Dr. Chul-Hee Lee

E-Mail Website
Guest Editor
Department of Mechanical Engineering, Inha University, Incheon, Incheon, Korea
Interests: component design and optimization; tribology in machine components; dynamics and control of mechanical systems; driveline system/component design and vibration analysis

Special Issue Information

Dear Colleagues,

Most machine components work under various friction conditions, and wear failure is also one of the major failure modes of components. An understanding of the tribological behavior of machine parts is necessary in order to predict the service life of parts and improve their performance. The study of the tribological behavior of components can also be used to monitor and control mechanical equipment. This Special Issue focuses on the latest innovative discoveries and applications in the field of tribology used in machine components. Advances in the cross-correlation of experimental results in machine component applications are highly welcome. Papers dedicated to the simulation and optimization of component tribological characteristics with the use of computer techniques are also highly suitable for this Special Issue. Potential themes include, but are not limited to, the following: processes and phenomena related to component tribology property, tribology of surface coatings, wear mechanisms and durability design, tribological behavior of smart materials, lubrication of machine components, computer simulation in tribology, component tribological behaviors under extreme working conditions, friction behavior control of components, and the influence of material and fabrication processes on tribological behavior.

Prof. Dr. Chul-Hee Lee
Guest Editor

Manuscript Submission Information

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Keywords

  • component
  • tribology
  • wear mechanisms
  • lubrication
  • computer simulation
  • control

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Published Papers (3 papers)

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Research

14 pages, 3082 KiB  
Article
Study on the Performance of Liquid Metal Lubricated V-Groove Bearing Considering Turbulence
by Mingyu Xu and Wei Chen
Appl. Sci. 2021, 11(3), 940; https://doi.org/10.3390/app11030940 - 21 Jan 2021
Cited by 7 | Viewed by 2470
Abstract
To study the application of liquid metal (LM) in the field of practical lubrication, the viscosity of gallium based liquid metal (GBLM) was measured initially, and the relationship between viscosity and temperature was fitted to obtain the viscosity under high temperature. Under the [...] Read more.
To study the application of liquid metal (LM) in the field of practical lubrication, the viscosity of gallium based liquid metal (GBLM) was measured initially, and the relationship between viscosity and temperature was fitted to obtain the viscosity under high temperature. Under the simulated high temperature and vacuum working environment of computed tomography tube (CTT) machines, considering the influence of turbulence, the changes, with eccentricity, of bearing capacity, discharge, friction power consumption, temperature rise, stiffness, and critical mass of the GBLM lubricated V-groove bearing (V-g B) were analyzed. Due to the special structure of V-g B, the coordinate transformation was carried out and the turbulent Reynolds equation was solved by using the finite difference method and the local integral method. The bearing film thickness and pressure distribution under the two coordinate systems were analyzed and compared and the pressure distribution of V-g B under small eccentricity and large eccentricity was studied, respectively. The performance of GBLM lubricated V-g B was studied, which provides theoretical guidance and an analytical method for LM bearing of high-performance CT equipment. Full article
(This article belongs to the Special Issue Tribology in Machine Components)
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16 pages, 6235 KiB  
Article
Investigations of Adhesion under Different Slider-Lube/Disk Contact States at the Head–Disk Interface
by Yuyan Zhang, Ling Jiang, Weixu Yang, Chenbo Ma and Qiuping Yu
Appl. Sci. 2020, 10(17), 5899; https://doi.org/10.3390/app10175899 - 26 Aug 2020
Cited by 1 | Viewed by 2269
Abstract
Adhesion is the key factor influencing the failure of the hard disk drive operating under ultra-low flying height. In order to mitigate the negative effects of adhesion at the head–disk interface (HDI) and promote further development of the thermal flying height control (TFC) [...] Read more.
Adhesion is the key factor influencing the failure of the hard disk drive operating under ultra-low flying height. In order to mitigate the negative effects of adhesion at the head–disk interface (HDI) and promote further development of the thermal flying height control (TFC) technology, an adhesive contact model based on the Lifshitz theory accounting for the thermal protrusion (TP) geometry of TFC slider, the layered structures of the head and disk, and the operation states of the slider was proposed to investigate the static contact characteristics at the HDI. The simulation results demonstrated the undesirable unstable regions during the transitions between different operation states and the necessity of applying TFC technology. The reduction in the head–media spacing (HMS) was found to be achieved by properly increasing the TP height, decreasing the thickness of the lubricant layer or the thickness of the diamond–like carbon (DLC) layer during the flying state or the TP–lube contact state. At the TP–DLC contact regime, the attractive interaction was stronger than other states, and the strong repulsive interaction made the HMS difficult to be further reduced through the increase in the TP height or the decrease in the lubricant thickness. Full article
(This article belongs to the Special Issue Tribology in Machine Components)
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22 pages, 7218 KiB  
Article
Key Factors of the Initiation and Development of Polygonal Wear in the Wheels of a High-Speed Train
by Yue Wu, Xuesong Jin, Wubin Cai, Jian Han and Xinbiao Xiao
Appl. Sci. 2020, 10(17), 5880; https://doi.org/10.3390/app10175880 - 25 Aug 2020
Cited by 17 | Viewed by 3139
Abstract
The polygonal wear of train wheels occurs commonly in rail transport and increases the wheel–rail interaction force dramatically and has a bad effect on the safety and comfort of the train. The mechanism of polygonal wear needs to be studied. The characteristics of [...] Read more.
The polygonal wear of train wheels occurs commonly in rail transport and increases the wheel–rail interaction force dramatically and has a bad effect on the safety and comfort of the train. The mechanism of polygonal wear needs to be studied. The characteristics of test data measured from 47,000 sets of polygonal wheels of high-speed trains were analysed statistically. The analysis shows that, in the entire use life cycle of the wheels, the order (wavelength) and development speed of polygonal wear are different; they correspond to different wheel diameters because of wear and re-profiling. A prediction model, which considered the flexibility of the wheelset for the polygonal wear of the wheels of high-speed trains, was developed to explain this phenomenon. This theoretical model analyses the initiation, development, and characteristics of polygonal wear. The analysis includes the effect of the high-frequency flexible deformation of the wheelset, train operation speed, and wheel diameter variation. This study suggests that, if the wheel perimeter is nearly an integral multiple of the wavelength of severe periodic wear along the wheel circumference, the polygonal wear on the wheel can develop quickly. Furthermore, the wavelength of the periodic wear of the wheel relies on the operation speed of the train and wheelset resonant frequency. Therefore, the initiation and development of polygonal wear on wheels depends on the operation speed, wheel diameter, and the resonant frequencies of the wheelset. This conclusion can be applied to research concerning measures associated with the suppression of polygonal wear development. Full article
(This article belongs to the Special Issue Tribology in Machine Components)
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